European Space Agency Research and Science Support Department Planetary Missions Division Huygens-DISR NASA PDS and ESA PSA Interface Control Document [HP-DISR-EAICD-1] Version 1.1 Prepared by: Charles (Chuck) See Instrument PI: Martin Tomasko PDS Interface: Lyle Huber Table of Contents 1. Introduction 4 1.1 Purpose and Scope 4 1.2 Contents 4 1.3 Intended Readership 4 1.4 Applicable Documents 4 1.5 Relationships to Other Interfaces 4 1.6 Acronyms and Abbreviations 5 1.7 Contact Names and Addresses 5 2. Overview of Process and Product Generation 6 2.1 Pre-Flight Data Products 7 2.2 Sub-System Tests 8 2.3 Instrument Calibrations 8 2.4 Other Files written during Calibration 8 2.5 In-Flight Data Products 8 2.6 Titan Encounter Data Products 9 2.7 Software 10 2.8 Documentation 11 2.9 Derived and other Data Products 12 3. Archive Format and Content 13 3.1 Format and Conventions 13 3.1.1 Deliveries and Archive Volume Format 13 3.1.2 Data Set ID Formation 13 3.1.3 Data Directory Naming Convention 14 3.1.4 File Naming Convention 14 3.2 Standards Used in Data Product Generation 15 3.2.1 PDS Standards 15 3.2.2 Time Standards 15 3.2.3 Reference Systems 15 3.2.4 Other Applicable Standards 15 3.3 Data Validation 16 3.4 Content 16 3.4.1 Volume Set 16 3.4.2 Data Set 16 3.4.3 Directories 16 3.4.3.1 Root Directory 20 3.4.3.2 Calibration Directory 20 3.4.3.3 Catalog Directory 20 3.4.3.4 Index Directory 20 3.4.3.5 Browse Directory and Browse Files 21 3.4.3.6 Geometry Directory 21 3.4.3.7 Software Directory 21 3.4.3.8 Gazetteer Directory 21 3.4.3.9 Label Directory 21 3.4.3.10 Document Directory 21 3.4.3.11 Extras Directory 22 3.4.3.12 Data Directory 22 4. Detailed Interface Specifications 23 4.1 Structure and Organization Overview 23 4.2 Data Product Design 23 4.3 Location of DISR Sub-Instruments 25 4.5 Solar Aureole Columns, Rows, Filters, and Polarization 27 4.6 Description of Possible values for DETECTOR_ID keyword 27 4.7 Description of Possible values for DESCENT_CYCLE_NAME 28 4.8 Other Label Elements or Keywords 29 4.8.1 PRODUCT_ID 29 4.8.2 SEQUENCE_NUMBER 29 4.8.3 SPACECRAFT_CLOCK_START_COUNT & ..._STOP_COUNT 29 4.8.4 EXPOSURE_DURATION 29 4.8.5 EXPOSURE_TYPE 30 4.8.6 SPACECRAFT_ALTITUDE_START & SPACECRAFT_ALTITUDE_END 30 4.8.7 PREDICTED_ALTITUDE 30 4.8.8 AZIMUTH_START & AZIMUTH_END 30 4.8.9 AZIMUTH_NORTH_START & AZIMUTH_NORTH_END 31 4.8.10 SPIN_RATE 31 4.8.11 ROTATIONS 31 4.8.12 SPIN_RATE_START & SPIN_RATE_END 31 4.8.13 HYUGENS:EW_TILT_ANGLE_START and ..._END 31 4.8.14 LAMP_STATE 31 4.8.15 NULL_PIXEL_2 & NULL_PIXEL_3 32 4.8.16 NATIVE_START_TIME & NATIVE_STOP_TIME 32 4.8.17 MEASUREMENT_TYPE 32 5.0 Sample Labels 33 5.1 DARK LABEL 33 5.2 DESCENT LABEL 37 5.3 HOUSEKEEPING LABEL 41 5.4 IMAGE TABLE LABEL 44 5.4b IMAGE DISPLAY LABEL 50 5.5 IR LABEL 54 5.6 LAMP LABEL 65 5.7 SOLAR LABEL 69 5.8 STRIP LABEL 74 5.9 SUN LABEL 78 5.10 TIME LABEL 82 5.11 VIOLET LABEL 86 5.12 VISIBLE LABEL 89 5.13 VISIBLE_EX LABEL 95 6. Revisions to Earlier Data Volumes 100 1. Introduction 1.1 Purpose and Scope The EAICD (Experimenter to Archive Interface Control Document) describes the data and documentation from the Descent Imager and Spectral Radiometer (DISR) instrument (aboard the Huygens Probe) that was submitted to the European Space Agency (ESA) Planetary Science Archive (PSA) and the National Aeronautics and Space Agency (NASA) Planetary Data System (PSA) archive. 1.2 Contents This document describes the archived data volume and data flow of the DISR instrument on the Huygens Probe. It includes information on how data were processed, formatted, labeled and uniquely identified. The document discusses general naming schemes for data volumes, data sets, data and label files. Standards used to generate the product are explained. 1.3 Intended Readership The staff of archiving authority (Planetary Data System for NASA, Planetary Science Archive for ESA) design team and any potential user of the DISR data. 1.4 Applicable Documents The DISR archive has been generated under PDS version: PDS3, and the Planetary Science Data Dictionary used was the Online database: PSDCAT1R90, Generated Tue Jul 9 11:07:03 2013, Version: OPS. 1.5 Relationships to Other Interfaces This document completely describes the DISR data and documentation as submitted to the NASA PDS and ESA PSA. In the event that there is any conflict between this document and any other Cassini or Huygens data archiving document regarding the DISR archive volume, this document will take precedence. 1.6 Acronyms and Abbreviations ASCII = American Standard Code for Information Interchange DCT = Discrete Cosine Transformation DDB = Descent Data Broadcast DISR = Descent Imager/Spectral Radiometer DLIS = Downward-looking Infrared Spectrometer DLV = Downward-looking Violet Photometer DLVS = Downward-looking Visible Spectrometer DTWG = Descent Trajectory Working Group EAICD = Experimenter to Archive Interface Control Document ESA = European Space Agency ESOC = European Space Operation Center HRI = High Resolution Imager IR = Infrared Wavelengths ITAR = International Traffic and Arms Regulations JPL = Jet Propulsion Laboratory MRI = Medium Resolution Imager NASA = National Aeronautics and Space Administration N/A = not applicable or not available PDF = Adobe Acrobat Format Documents PDS = Planetary Data System PNG = Portable Network Graphics PSA = Planetary Science Archive SLI = Side-Looking Imager SSL = Surface Science Lamp T0 = time in the mission when pyros fire and the DDB is reset to 0 ULIS = Upward-looking Infrared Spectrometer ULV = Upward-looking Violet Photometer ULVS = Upward-looking Visible Spectrometer XDR = External Data Representation Standard 1.7 Contact Names and Addresses Name Affiliation Phone Email Address Marty Tomasko DISR +1 520 621-6969 mtomasko2@gmail.com Lyn Doose DISR +1 520 621-2127 ldoose@lpl.arizona.edu Chuck See DISR +1 520 621-1097 csee@lpl.arizona.edu Lyle Huber PDS +1 505 646-1862 lhuber@nmsu.edu Sheila Chatterjee JPL +1 818 393-0924 sheila.chatterjee@jpl.nasa.gov Nicolas Altobelli ESA +34 91 813 1201 nicolas.altobelli@sciops.esa.int Jean-Pierre Lebreton ESA +31 71 565-3600 Jean-Pierre.Lebreton@rssd.esa.int 2. Overview of Process and Product Generation The following chart describes the data flow from the Cassini spacecraft to the archive. FIG2-1.GIF DISR data was first processed on-board by the flight software. Various operations were performed (depending on the source of the data) to group the data into DISR data sets. This is explained in greater detail in the Experiment Users Manual (in the DOCUMENT folder called EXP_USERS_MANUAL_REV_C.PDF). For more information see also SP1177.PDF (in the DOCUMENTS folder) and Space Science Reviews 104: 469-551, 2002. A data set is a single exposure of a single data product (data products are as defined in this document). A data cycle is a grouping of a set of measurements associated with a science goal. Thus, a group of data sets comprises a data cycle, which constitutes an organized group of measurements in close proximity of time and altitude (also called a Descent Cycle). These sets were formatted into telemetry packets and delivered to the probe for transmission on one or both of the Huygens Probe's telemetry streams. The Huygens Probe transmitted the data to the Cassini Orbiter, which relayed the data to the ground (via the DSN). The combined telemetry streams were delivered to ESOC, where they were distributed to the DISR team at the University of Arizona. At the University of Arizona the telemetry was processed to reconstruct DISR data sets, which are expressed as data numbers. The data provided is at the 1b level, defined 'as data that have been sorted by instrument data types and instrument modes. Data are in scientifically useful form, such as images or individual spectra. These data are still uncalibrated'. DISR includes the raw data from the data stream converted into ASCII files when appropriate, some data converted to physical units, and data interpretation documentation (calibration documents, users guides, white papers, etc.). Thus, the archive contains the decompressed data numbers and calibration information. The calibration reports contain all information necessary to obtain calibrated physical data. For detailed information see also SP1177.PDF (in the DOCUMENTS folder) and Space Science Reviews 104: 469-551, 2002. Individuals involved in the generation of DISR data products are listed below, along with their responsibilities and office numbers in the Kuiper Space Sciences Building (#92) at the University of Arizona, Tucson Arizona. Name Room # Responsibility Marty Tomasko 233 PI Lyn Doose 239 Co-I Bashar Rizk 213 Co-I Chuck See 214 Engineering Operations Mike Bushroe 235C Telemetry Processing Lisa McFarlane 235D Analysis and Documentation Steffi Engel 212 Data Analysis Andrew Eibl 219 Data Analysis Mike Prout 237 Management 2.1 Pre-Flight Data Products The DISR raw calibration data is included in the EXTRAS section of the archive as: HIGHER_ORDER_PRODUCTS\DISR3_CALIBRATION_DATA. The volume includes all the flight unit (DISR 03) lab calibration data from 1996, plus a couple of additional tests run on flight spare optics in 2001. A companion document which further describes the data is in the same directory as: "DISR Lab Calibration Data Archive Companion Document". For the most part all pre-flight data is stored in External Data Representation (XDR) formatted files. 2.2 Sub-System Tests All relevant Sub-System Test data appear in the calibration reports or white paper summaries. No additional Sub-system data are included. Instrument level tests which target subsystem performance are included in the calibration (see section 2.1) and In-flight test data described in section 2.5. 2.3 Instrument Calibrations The DISR PI will deliver calibration documents that clearly describe how to calibrate the raw data, approximately one per major instrument system. There is a calibration document for each major system listed below: 1) Imagers 2) Infrared Spectrometers 3) Solar Aureole 4) Sun Sensor 5) Surface Science Lamp 6) Violet Photometers 7) Visible Spectrometers and, 8) Calibration Standard The instrument's calibration data is discussed in section 2.1 2.4 Other Files written during Calibration The calibration reports and white paper summaries will contain all information necessary to obtain calibrated data. See section 2.1 for discussion of the calibration data. 2.5 In-Flight Data Products The EXTRAS directory contains "In-Flight" test data collected from the time the instrument was installed on the Huygens Probe (October 1996) until the Titan Encounter (January 2005). There is also a companion document which describes this data ("DISR In-Flight Test Data Archive Companion Document"), which is co-located with the data. The relevant archive directory is: EXTRA\HIGHER_ORDER_PRODUCTS\DISR_IN-FLIGHT_DATA. For the most part all pre-flight data is stored in External Data Representation (XDR) formatted files. 2.6 Titan Encounter Data Products Encounter Data is organized as per the following categories and converted to ASCII, with the exception of the images. The images are available in 8 bit PNG format (in the BROWSE directory), and as 16 bit TIFF and XDR images in the DATA directory. Also available in the DATA directory are ASCII tables containing the pixel intensities for each DISR image. The BROWSE PNG images are enlarged (x2), rotated and stretched for easier general viewing and access. Data Product Type Comments BROWSE Image object Portable Network Graphic (PNG) representations of the individual descent images CCD_DARK_DATA Text object Dark (covered column) CCD exposures for each data cycle, used to determine the measurement offset. DERIVED_DATA_PRODUCTS Multiple Table objects Tables of the spectrum measured during the descent in physical units [W/(sqm-u-sr)], with certain prescribed assumptions. DESCENT_CYCLES Text object Header information for an entire cycle that is found nowhere else. HIGHER_LEVEL_DATA Image object Panoramic mosaics of the descent created from the DISR images. HOUSEKEEPING Text object Engineering data describing the internal function of the instrument and provide temperatures that are needed for calibration. IMAGERS Image object & Table object Contains images of three main different types and sizes (High Resolution HRI: 160 by 256, Medium Resolution MRI: 176 by 256, Side Looking SLI: 128 by 256) IR_SPECTROMETER Multiple Table objects Infrared spectra (either the uplooking ULIS, downlooking DLIS or both in one) LAMP Text object Information about the internal calibration lamps and the surface science lamp (SSL). SLI_STRIP Table object A vertical strip from the right and left side of the side looking Imager (2 by 254). SOLAR_AUREOLE Table object Solar Aureole data (24 or 4 by 50) divided into 4 channels (blue and red polarized horizontally and vertically) SUN_SENSOR Table object Sun Sensor data (three time pulses and an amplitude, to determine spin rate, solar azimuth and solar zenith angles). TIME Table object Clock values (2 by 20) comparing probe mission time to DISR internal time. VIOLET_PHOTOMETER Table object Violet Photometer (either uplooking ULV or downlooking DLV). A single number. VISIBLE_EXTRA_COLUMNS Table object Reference measurements of stray light used with the visible data (always 2 by 200) VISIBLE_SPECTROMETER Table object Visible Spectra (either uplooking ULVS: always 2 by 200; or downlooking DLVS: variable by 200) 2.7 Software No special software is needed since the data is provided in ASCII form or in industry standard TIFF or PNG files and the calibration documents do not require software. All information that is necessary to obtain calibrated data are provided in the calibration reports or white paper summaries. No special software is required to use the calibration documents or white paper summaries. The DISR instrument calibration reports contain complete descriptions of each instrument detector system, the calibration data, methods, and algorithms for converting the instrument data numbers into physical units and intensities into data numbers. Reduced mean intensities over the field of view (FOV) are provided for the spectrometers. However for the broad band instruments (imagers, SA camera) the mean intensity over the FOV is not a useful number since the spectral variation is important, and the bandpass changes significantly during the descent. It is felt that the best scientific approach is to create models which reproduce data numbers rather than mean intensities. In general generic calibration software is not available. Some lines of code exist as examples in the calibration reports. A collection of Interactive Data Language (IDL) source code that was used by the DISR team to interpret the data has been added to the EXTRAS directory as: EXTRAS\HIGHER_ORDER_PRODUCTS\IDL_PROGRAMS Also in included in this directory are a companion document ("DISR Data Software Companion Document") and additional support documentation. Interpretation of the DISR data is model dependent and selection of the model parameters (i.e. atmospheric composition, intensity spectrum, surface reflectance, variation over the field of view) is key in deciphering the data. The scientist is encouraged to develop their own software to explore the physical interpretations of the DISR data. 2.8 Documentation The calibration reports or white paper summaries contain all information necessary to obtain calibrated data. Calibration reports for each major DISR system are provided in Adobe Acrobat PDF format with incorporated tables and figures as follows: 1) Imagers; 2) Solar Aureole; 3) Sun Sensor; 4) Surface Science Lamp; 5) Calibration Standard. White paper summaries will be provided in Adobe Acrobat PDF format with incorporated tables and figures for the following: 1) Infrared; 2) Violet; 3) Violet flux; 4) Visible. Most of the documents are also available in MS-Word and ASCII format. The folder CALIBRATION_STANDARD contains the following three reports: 1) CALIBRATION_STANDARD_REVIEW, deals primarily with the monochrometer used in the absolute calibration of the DISR; 2) DARK_CURRENT, explains the method for determining dark current at a given time; 3) INTEGRATING_SPHERE_HOMOGENEITY, explores the uniformity of the light used for calibration. Other helpful documents include: DOCINFO.TXT: Describes all the documents in this section; EAICD.PDF: This document; EXP_USERS_MANUAL_REV_C.PDF: Provides a detailed description of the DISR instrument (including, e.g., Science Overview, Instrument Overview, Operations, Instrument Commands, Software Architecture, Buffer Allocations, Bit Numbering, Telemetry Formats, etc. This document also provides an explanation of housekeeping information, e.g., ccd_flag, proc_flag, etc); HEADER_DESCRIPTION.PDF: Provides a description of the information that is associated with each data file in the header of the data; IR_SW_AND_DATA_COLLECTION.DOC: Provides a detailed explanation of the organization of the infrared data (including locations of shutter time, sample time, operation time, region, rotation, etc.). The DISR_DATA_USERS_GUIDE is a top level guide for using the archived DISR data, and should be a first read for anyone using the volume. The structure of the document section is shown below, and later in this document. | - DOCUMENT | - BIBLIOGRAPHY | - DISR_CALIBRATION_DOCUMENTS | - CALIBRATION_STANDARD | - CALIBRATION_STANDARD_REVIEW | - DARK_CURRENT | - INTEGRATING_SPHERE_HOMOGENEITY | - IMAGERS | - INFRARED_SPECTROMETERS | - IR_SPECTROMETER_CAL_DOC | - IR_SPECTROMETER_CAL_NOTES | - SLI_STRIPS | - SOLAR_AUREOLE | - SUN_SENSOR | - SURFACE_SCIENCE_LAMP | - VIOLET_PHOTOMETERS | -VIOLET_FLUX_DETERMINATION | -VIOLET_PHOTOMETER_CAL_DOC | - VISIBLE_SPECTROMETERS | -VISIBLE_SPECTROMETER_CALDOC | -VISIBLE_SPECTROMETER_CAL_NOTES | - DISR SUPPORTING DOCUMENTS | - DISR_DATA_USERS_GUIDE | - EAICD | - ESA_SP1177 | - DISR_INSTRUMENT | - SUNLIGHT_PENETRATION_MODEL | - EXPERIMENT_USERS_MANUAL | - HEADER_DESCRIPTION | - SPACE_SCIENCE_REVIEW | - DOCINFO.TXT 2.9 Derived and other Data Products The DATA/DERIVED_DATA_PRODUCTS directory contains the average intensity over the field of view (in Watts/(m2-u-sr)) for the violet, visible and infrared systems, both upward looking, and downward looking. The DATA/HIGHER_LEVEL_DATA directory contains mosaic presentations of the DISR images provided as posters. Derived data products and schedules in support of the Descent Trajectory Working Group are presented in the DTWG archive. 3. Archive Format and Content 3.1 Format and Conventions 3.1.1 Deliveries and Archive Volume Format The original DISR data was released to the archive on 15 July 2006. The proprietary period extended for 18 months after the descent, and thus expired on 14 July 2007. The first major revision to the DISR data archive is being submitted to the NASA PDS (with copy to the ESA PSA) in January 2014. It includes updated image files, and substantial improvement in documentation. Also, many minor format and syntax errors were corrected. DISR delivers the data to the PDS archive in electronic form and the archiving authority writes the physical volumes. 3.1.2 Data Set ID Formation HP-SSA-DISR-2/3-EDR/RDR-V1.1 ----- We provide Level 2 data as defined in the table below: Level Type Data Processing Level Description 2 Edited Data Corrected for telemetry errors and split or decommutated into a data set for a given instrument. Sometimes called Experimental Data Record. Data are also tagged with time and location of acquisition. Corresponds to NASA Level 0 data. 3.1.3 Data Directory Naming Convention The subdirectories will be named according to the data product. Data products are listed in section 2.5 of this document. 3.1.4 File Naming Convention The DISR archive data filenames are made up of a 6 character (or less) file type descriptor (i.e. IMAGE), followed by 4 numerical digits containing the sequential dataset sequence number, followed by a 5 digit number containing the mission time in seconds after T0, followed by the letter 'S' to denote 'seconds', followed by either a 3 digit number conveying the starting altitude of the observation in kilometers (followed by _KM) for observations above 10 km, or a 4 digit number corresponding to the altitude in meters (followed by _M) for observations below 10 km, all followed by the appropriate 3 character file extension as described below. Here are some examples of DISR filenames (for each data type). 1) DARK_0001_00191_S_140_KM.TAB 2) DCYCLE_0058_07063_S_8116_M.TXT 3) HKEEPN_0060_08811_S_0269_M.TXT 4A) IMAGE_0402_05765_S_017_KM.TAB 4B) IMAGE_0402_05765_S_017_KM.TIF 4C) IMAGE_0402_05765_S_017_KM.XDR 5) IR_0109_06738_S_011_KM.TAB 6) LAMP_0030_01985_S_060_KM.TXT 7) SOLAR_0100_06530_S_012_KM.TAB 8) STRIP_0173_04090_S_030_KM.TAB 9) SUN_0001_00265_S_137_KM.TAB 10) TIME_0099_04022_S_030_KM.TAB 11) VIOLET_0446_08872_S_0000_M.TAB 12) VIS_EX_0001_00143_S_143_KM.TAB 13) VISIBL_0001_00143_S_143_KM.TAB (26.3) In browse: PNGIMG_0002_00144_S_143_KM.PNG ___S__. For the file extensions .TAB refers to a table, .TXT refers to ASCII text, .PNG refers to portable network graphics, .TIF refers to Tagged Image File format and .XDR is a eXternal Data Representation file. The maximum length for a DISR dataset is 30 characters (26+'.'+3). 3.2 Standards Used in Data Product Generation 3.2.1 PDS Standards We intend to comply with the PDS standards to the extent as defined in this document. 3.2.2 Time Standards All start times are referenced to the probe on-board software mission time, T0. DISR mission time is synchronized to the Huygens probe mission timer T0. An exception to this is for the first couple of message data products (which are generated before synchronization and are relative to when DISR was turned on. These first few messages are time stamped, and the offset is later measured. Mission time is measured to one ten-thousandth of a second (0.1 ms). 3.2.3 Reference Systems DISR derives azimuth information from the Sun Sensor instrument subsystem. The azimuth is measured relative to the sun in the instantaneous plane of the probe and is thus labeled an apparent solar azimuth angle. Positive spin (or azimuth) is Counterclockwise as viewed from above (Zenith). All angles are measured within a right-handed system aligned to the Huygens Probe system, which is defined in the EID, Part A. Quoting from Issue 1, Rev 0, Sect. 3.1, page 3: "The Probe axes form a right-handed orthogonal system Xp, Yp, Zp that is fixed relative to the Probe geometry. The Probe Reference Frame has the same orientation as the Orbiter Reference Frame (i.e., no tilt angle). The -Xp axis is pointing along the Probe centerline towards the nose of the Probe. The -Zp axis is pointing in the direction of the top SED strut. The origin of the Probe Reference Frame is on the lower side of the experiment platform (i.e., the side facing the Probe nose)." See the DISR Archive Users' Guide for further information. The DISR mechanical system within which the apparent solar azimuth angle above is measured, is aligned to the Huygens Probe system described above but the origin of the DISR system is displaced from that of the Huygens system. 3.2.4 Other Applicable Standards N/A 3.3 Data Validation The internal validation of the scientific content will be performed by the science team. All DISR packets include Cyclic Redundancy Check codes. Packets with invalid codes are discarded. We will ensure data values are in the expected range and are valid numbers. We agree to a peer review of the EAICD by a committee chaired by the Project Scientist and the PSA manager and consisting of the members of the HSWT, members of the DISR team and PSA and PDS personnel and to abide by their recommendations within the resources available. 3.4 Content 3.4.1 Volume Set The DISR data set will be part of the Huygens Volume Set. 3.4.2 Data Set All of the raw DISR data products (listed in section 2.5 of this document) will be combined to form one data set. 3.4.3 Directories ROOT | - BROWSE || - PNG | - CATALOG || - CATINFO.TXT || - DATASET.CAT || - DISRINST.CAT || - INST_HOST.CAT || - MISSION.CAT || - PERSON.CAT || - REF.CAT || - (SOFT.CAT) || - (TARGET.CAT) | - DATA || - CCD_DARK_DATA || - DERIVED_DATA_PRODUCTS ||| - DLIS ||| - DLV ||| - DLVS ||| - ULIS ||| - ULV ||| - ULVS || - DESCENT_CYCLES || - HIGHER_LEVEL_DATA ||| - POSTERS || - HOUSEKEEPING || - IMAGER ||| - TABLE_FORMAT ||| - TIFF_FORMAT ||| - XDR_FORMAT || - IR_SPECTROMETER || - LAMP || - SLI_STRIP || - SOLAR_AUREOLE || - SUN_SENSOR || - TIME || - VIOLET_PHOTOMETER || - VISIBLE_EXTRA_COLUMNS || - VISIBLE_SPECTROMETER | - DOCUMENT || - BIBLIOGRAPHY || - DISR_CALIBRATION_DOCUMENTS ||| - CALIBRATION_STANDARD |||| - CALIBRATION_STANDARD_REVIEW |||| - DARK_CURRENT |||| - INTEGRATING_SPHERE_HOMOGENEITY ||| - IMAGERS ||| - INFRARED_SPECTROMETERS |||| - IR_SPECTROMETER_CAL_DOC |||| - IR_SPECTROMETER_CAL_NOTES ||| - SLI_STRIPS ||| - SOLAR_AUREOLE ||| - SUN_SENSOR ||| - SURFACE_SCIENCE_LAMP ||| - VIOLET_PHOTOMETERS |||| -VIOLET_FLUX_DETERMINATION |||| -VIOLET_PHOTOMETER_CAL_DOC ||| - VISIBLE_SPECTROMETERS |||| -VISIBLE_SPECTROMETER_CALDOC |||| -VISIBLE_SPECTROMETER_NOTES || - DISR SUPPORTING DOCUMENTS ||| - DISR_DATA_USERS_GUIDE ||| - EAICD ||| - ESA_SP_1177 |||| - DISR_INSTRUMENT |||| - SUNLIGHT_PENETRATION_MODEL ||| - EXPERIMENT_USERS_MANUAL ||| - HEADER_DESCRIPTION ||| - SPACE_SCIENCE_REVIEW || - DOCINFO.TXT | - EXTRAS || - HIGHER_ORDER_PRODUCTS ||| - DISR3_CALIBRATION_DATA |||| - DISR3_CAL |||| - DISR_LAB_CAL_DATA_DOC ||| - DISR_IN-FLIGHT_DATA |||| - DF3 |||| - DISR_IN-FLIGHT_TEST_DOC ||| - DISR_XDR_DATA |||| - 14JAN05 |||| - DISR_XDR_DATA_DOC ||| - IDL_PROGRAMS |||| - SOFTWARE_SUPPORT_DOCUMENTS |||| - SOURCE_CODE |||| - DISR_IDL_CODE_DOC || - IMAGE_ELEMENTS ||| - DARK_CURRENT_IMAGES |||| - PGM |||| - TABLE_FORMAT ||| - IMPROVED_FLAT_FIELDS |||| - PGM |||| - TABLE_FORMAT ||| - ON-BOARD_FLAT_FIELDS ||| - RAW_IMAGES |||| - PGM |||| - TABLE_FORMAT ||| - SQRT_TABLES || - MOSAICS ||| - MOSAICS_PNG ||| - MOSAICS_PPM || - MOVIES ||| - NARRATION_SCRIPTS ||| - TECH_MOVIE ||| - TITAN_DESCENT_MOVIE || - POSTERS || - PROBE_ATTITUDE ||| - DATA_AT_SOLAR_CROSSING ||| - HUYGENS_DESCENT_PARAMETERS || - PROCESSED IMAGES ||| - DISRSOFT_E_IMAGES ||| - DISRSOFT_G_IMAGES ||| - UNSMOOTHED_IMAGES || - RENDERINGS | - INDEX || - INDEXINFO.TXT || - INDEX.LBL || - INDEX.TAB | - AAREADME.TXT | - ERRATA.TXT | - VOLDESC.CAT 3.4.3.1 Root Directory AAREADME.TXT Volume Contents and format info in ASCII text format. ERRATA.TXT Cumulative listing of updates for all DISR volumes published thus far. VOLDESC.CAT Description of volume contents in a PDS format. 3.4.3.2 Calibration Directory There is no Calibration Directory. All of the calibration information is contained in the DOCUMENT directory. There detailed calibration reports are provided for all the DISR Science sub=instruments, and calibration standard as follows: 1) Imagers; 2) Side Looking Imager Strips, 3) Infrared Spectrometers; 4) Solar Aureole Camera; 5) Sun Sensor; 6) Surface Science Lamp; 7) Violet Photometer; 8) Visible Spectrometers and; 9) Calibration Standard. 3.4.3.3 Catalog Directory CATINFO.TXT ASCII description of the contents of this directory. DATASET.CAT Data set catalog object. DISRINST.CAT Instrument catalog object. INST_HOST.CAT Space craft catalog object (to be provided by ESA) MISSION.CAT Mission catalog object (to be provided by the Cassini Project) PERSON.CAT Listing of personnel involved in data production. REF.CAT References (published literature) catalog object. SOFT.CAT Information about the DISR software. TARGET.CAT For Titan, provided by the NASA PDS 3.4.3.4 Index Directory Index table of all label files this archive. 3.4.3.5 Browse Directory and Browse Files We provide Thumbnails of all images in slightly modified raw form, in PNG format. The files are same images as are in the Image directory, but converted to 8 bit PNG format, enlarged by a factor of two and stretched for easy viewing. The directory contains about 600 images. 3.4.3.6 Geometry Directory There is no Geometry Directory. Geometry data is included in the instrument calibration reports. 3.4.3.7 Software Directory N/A - There is no Software Directory in the DISR archive. No generic calibration software is available, although there are samples of Interactive Data Language (IDL) source code that was used by the DISR team to interpret the data added to the EXTRAS directory. 3.4.3.8 Gazetteer Directory N/A - There are no named features at this time. 3.4.3.9 Label Directory There is no Label Directory. Label files are located with their targets in the DATA and DOCUMENT directories. The Index table shows the location of all label files. 3.4.3.10 Document Directory Documents are provided in Adobe PDF format. In most cases MS Word and ASCII files are also available. The Calibration Reports are located in the Document directory. Other documents included in this directory are the DISR EAICD, Header Description, Users Manual, mission description documents and Bibliography. 3.4.3.11 Extras Directory The Extras Directory contains eight subdirectories: 1) HIGHER_ORDER_PRODUCTS: Contains calibration and In-Flight cruise data from the instrument, along with the raw Titan descent data in its original eXternal Data Representation (XDR) form, plus some of the Interactive Data Language (IDL) source code that was used by the DISR team to interpret the data . Companion documents are supplied that explain the contents of each directory. 2) IMAGE_ELEMENTS: A collection of the DISR images, and supporting elements (dark current model, flat fields, square root compression tables, etc) created by Erich Karkoschka as an improvement on the original reconstruction of the images. All elements are in PDS format. 3) MOSAICS: Assemblages of the DISR images to create views of Titan's surface. Filenames with numbers represent the resolution in meters/pixel (i.e. 4.png is a mosaic with 4 m/pixel resolution). These depictions were made using FORTRAN by Erich Karkoschka. The other 3 files (HIGH..., MEDIUM..., & TITAN.PNG) are earlier, hand made mosaics. 4) MOVIES: Two types of movies inhabit this directory. The Titan Descent Movies are an extension of Erich's mosaic work. There are sequenced frames of mosaics at increasingly higher resolution (starting out with frames which orient the viewer from the Mees Solar Observatory). A detailed description exists in the TITAN_DESCENT_MOVIE directory (TITAN_DESCENT_MOVIE.TXT). The Narration Scripts also describe these movies. The Tech Movie combines all of the DISR data into one graphic dynamic display (with sound). A detailed description exists in the TECH_MOVIE directory as DESCRIPTION_OF_TECH_MOVIE.TXT. 5) POSTERS: This directory contains a variety of views of Titans surface as seen by the Huygens probe during the descent. Various projections at distinct altitudes are presented. There is more detailed description in the file TITAN_POSTERS_DESCRIPTION. 6) PROBE_ATTITUDE: Measurements of the sun's position, and movement of features on Titan's surface allowed us to make of estimates of the Huygens probe's attitude and position during the descent. This information is provided in tabular form in this directory. 7) PROCESSED_IMAGES: The individual images taken by the DISR are presented in this directory with 3 levels of processing. The most basic (Unsmoothed Images) just have camera defects removed. The next step (E-Images) includes compressor artifact removal and some smoothing, while the G-Images also have geometric distortions removed and are photometrically normalized. 8) RENDERINGS: Movies of stereographic renderings of Titan's surface created by USGS using the DISR images. 3.4.3.12 Data Directory The data directory will is organized according to the directory levels as listed in section 2.5 of this document. 4. Detailed Interface Specifications 4.1 Structure and Organization Overview See preceding section. 4.2 Data Product Design The data products will be in ASCII format, with the exception of the Image and Image_Display which will be in TIFF & PNG format. Software will not be provided. There are often several types of data files within each data product type (such as with a different number of columns). The following lists each data product type, followed by a brief description, with dimensions shown in parentheses where appropriate. For more specific details see the disrinst.cat, the Experiment Users Manual or the Space Science Reviews paper listed in the Bibliography. 1) Dark: Dark exposures for each data cycle (2 by 256) are from 4 adjacent columns on the CCD covered by an opaque coating. The first dark column is DN values for columns 7 and 8 summed, and the second dark column is DN values for columns 9 and 10 summed. 2) Descent: Header information for an entire cycle that is found nowhere else. Lists cycle types, start times, etc. The predicted_altitude entry is from real-time data and is not necessarily correct. See section 4.8 for discussion of the available altitude information. 3) Hkeeping: Engineering data to check the internal function of the instrument. This is the only place where some types of temperature data exist (e.g. Electronics Assembly (EA) or Optics temperature specifically). 4) Image: Contains images of three main different types and sizes (HRI: 160 by 256 pixels, MRI: 176 by 256, SLI: 128 by 256). In addition, some images can be half this size, that is the number of columns by 128 (or half of 256 rows). The top and bottom row are copies of adjacent rows as the total number of rows needed to be a multiple of 16 to work with the data compressor. These will be provided in TIFF and ASCII table format. Data will be in DN and will include exposure time. 5) Ir: Infrared spectra, either the ULIS (2 by 150), DLIS (2 by 150) or IR combined (24 by 150). Data will be a table of DN and will include sufficient information to compute effective exposure times. 6) Lamp: Current and Voltage Information about the internal calibration lamps and the SSL. 7) Solar: Solar Aureole data (24 or 4 by 50) divided into 4 channels (blue and red horizontal and vertical). The 4 by 50 array is summed within each of the 4 channels. Data will be in DN and will include exposure time. 8) Strip: A vertical strip from the right and left side of the SLI Imager (2 by 254). Data will be in DN and will include exposure time. 9) Sun: Sun Sensor data (three time pulses and an amplitude). Pulse time is in seconds, amplitude is in DN. There are three slits in the Sun Sensor, and so as the image of the sun crosses the slit, one pulse per slit. This data is used to determine the azimuth and rotation rate of the probe, as well as the zenith angle of the sun. There are a variable number of measurements in a file. 10) Time: Time values (2 by 20) comparing probe mission time to DISR internal time. It is used to record the correlation between mission time from the probe that is sent to DISR in the probe broadcast messages and the master time which is kept by a hardware clock. Broadcast time is mission time from the DDB in 0.0001 second increments from the beginning of the mission. The master time corresponds to mission time and is also in 0.0001 second increments. Since the DISR is powered-on post T0, the broadcast time from the probe is always the larger value. 11) Violet: Violet Photometer (either ULV or DLV). A single number. data will be in DN. The violet photometers are instruments that are reading continuously, so there is no exposure time or integration time. 12) Visible: Visible Spectra (either ULVS: always 2 by 200; or DLVS: 2, 5, 10 or 20 by 200). For DLVS, the 20 by 200 is unsummed. Otherwise, 10, 5 and 2 adjacent columns are summed for arrays with 2, 5 and 10 DLVS columns. Data will be in DN and will include exposure time. 13) Visible_Ext: Reference measurements of scattered light used with the visible data. This measures instrument crosstalk. This uses otherwise unused columns between the ULVS/DLVS and DLVS/Imagers. The dimensions are always 2 by 200. Data will be in DN and will include exposure time. In the Browse directory: Image_Display contains the same files as the Image directory, but converted to 8 bit PNG format enlarged (x2) and stretched. Two other DATA subdirectories contain derived data products as describe in section 2.9, above. 4.3 Location of DISR Sub-Instruments The picture below shows the location of the optics for the DISR sub-instruments. In general the signal is carried from the optics to the detectors via fiber optics. FIG4-1.PNG 4.4 Instrument Temperature (Thermistor Reading) Description Some of the labels include a temperature array, referred to as the keyword INSTRUMENT_TEMPERATURE. The following is a description of each of the positions within this array, referred to as INSTRUMENT_TEMPERATURE_POINT. Location of the temperature sensors is shown below: FIG4-2.PNG ccd_t1 CCD Chip - On edge of CCD chip (part of the chip). ref_t2 Near CCD chip - MPAE reference. irb_t3 IR Chip, beginning - Near the thermal strap to detector lug (biased +10C)* ire_t4 IR Chip, ending - Near the thermal strap to detector lug (biased +10C)* ccdlug_t5 CCD Lug - Where the thermal strap meets the CCD. strap_t6 Strap - At strap split (IR/CCD), near DISR Strap Heater (not powered). optics_t7 Optics - On fiber optic conduit, about 1/3 way from CCD to Optics. violet_t8 Violet - Towards the Front of the optical bench, near cover (cooler). sh_aux_t9 Aux Board - On SH Aux. Circuit Card, near heater (not powered). sh_box_t10 SH Box - On Sensor Head (SH) back cover (facing EA), warm part of SH. ea_box_t11 EA Box - In Electronics Ass'y (EA), on Motherboard (warm, lags housing) * The IR temperatures (thermistor readings) in this keyword is too high by +10 K because of the sensor bias. Note that these are all thermistor readings and not calibrated temperatures. 4.5 Solar Aureole Columns, Rows, Filters, and Polarization For DISR#3 the correspondence between columns and rows in a Solar Aureole data set and a Full data set are as follows: Rows 0:49 in a Solar Aureole data set correspond to rows 204:253 in a Full data set. SA data set columns 0:5 6:11 12:17 18:23 Full data set columns * 40:45 31:36 23:28 14:19 Filter Blue Blue Red Red Polarization Horizontal Vertical Vertical Horizontal * refers to full CCD output used during calibration; not applicable to Titan descent 4.6 Description of Possible values for DETECTOR_ID keyword Keyword DETECTOR_ID is used to distinguish between sub-instrument detectors (or readout formats) when they co-exist in a data directory. Below is a list of the possible values for this keyword for DISR. "UHH": The Upper Half of the High resolution imager. "UHM": The Upper Half of the Medium resolution imager. "UHS": The Upper Half of the Side-looking imager. "LHH": The Lower Half of the High resolution imager. "LHM": The Lower Half of the Medium resolution imager. "LHS": The Lower Half of the Side-looking imager. "DLV": The Downward Looking Violet photometer. "ULV": The Upward Looking Violet photometer. "DLIS": The Downward Looking Infrared Spectrometer. "ULIS": The Upward Looking Infrared Spectrometer. "IR_COMB": The InfraRed spectrometers Combined, up and down in one dataset. "IR_LONG": The InfraRed spectrometers with LONG integration time. "STRIP": The side looking imager STRIP measurement. "SA": The Solar Aureole camera. "NS_DLVS": The Near Surface Downward Looking Visible Spectrometer format. "DLVS": Downward Looking Visible Spectrometer. "ULVS": Upward Looking Visible Spectrometer. "DARK" CCD covered pixel DARK current data. "MRI": Medium Resolution Imager, (176 by 256 pixels). "SLI": Side-Looking Imager, (128 by 256 pixels). "HRI": High Resolution Imager (160 by 256 pixels). "DLVS_EX": EXtra columns from the Downward Looking Visible Spectrometer. "ULVS_EX": EXtra columns from the Upward Looking Visible Spectrometer. See also MEASUREMENT_TYPE 4.7 Description of Possible values for DESCENT_CYCLE_NAME DESCENT_CYCLE_NAME is found in the Descent dataset labels. It is also known as Cycle Type. It is an indicator of the type of measurement set that the dataset belongs to. Descent Cycles are time and altitude based groupings of measurements aimed to a set science goal. Cycle Type # Descent Cycle Name 1 STANDARD_NON-IMAGE 2 STANDARD_IMAGE 3 FLAT_FIELD 4 CAL_CYCLE_A 5 CAL_CYCLE_B 6 CAL_CYCLE_C 7 UNDEFINED 8 DARK_CURRENT_ONLY 9 SPECTROPHOTOMETRIC 10 DRAIN_CYCLE 11 HIGH_NEAR_SURFACE 12 MEDIUM_NEAR_SURFACE 13 LOW_NEAR_SURFACE 14 VERY_LOW_NEAR_SURFACE 15 SURFACE_A 16 SURFACE_B 17 SURFACE_C 18 SURFACE_D 4.8 Other Label Elements or Keywords 4.8.1 PRODUCT_ID In general the product id for each DISR dataset follows the form: type_number_MTIME_mission time_DISR, where type_number is the dataset type, such as SOLAR or IMG, and mission time is the mission time at the start of the observation in hours_minutes_seconds_ten thousandths of a second. For example: "IMG_01033_MTIME_03_12_14_7773_DISR" is image #1033, taken at mission time 3 hours, 12 minutes and 14.7773 seconds after T0. 4.8.2 SEQUENCE_NUMBER The sequence number is a unique sequential integer number given to a dataset when it is generated. Thus the first dataset (of each type) generated after power is applied to the instrument is 0001 (i.e. the first Image taken is IMAGE_0001, the second is IMAGE_0002, etc). The dataset's sequence number is reported in the Label file as a 4 digit integer (i.e. 0001). 4.8.3 SPACECRAFT_CLOCK_START_COUNT & ..._STOP_COUNT Observations are time tagged using the DISR clock, which is referenced to the Huygens probe timer. Offsets are recorded in the DISR time datasets (\DATA\TIME). The times presented in this keyword are the beginning of the observation exposure and the end of the observation exposure. The Descent Data Broadcast (DDB) time is in seconds after the Huygens parachute deployment (aka T0). 4.8.4 EXPOSURE_DURATION Exposure duration for the CCD instruments (Imagers, Solar Aureole and Visible Spectrometers) is the time (in milliseconds) between the time the CCD is 'cleared' until the charge is transferred to the memory zone (i.e. the amount of time charge is allowed to accumulate on the CCD image area). It is analogous to the shutter open time on a standard camera. For the IR spectrometer the exposure time is azimuth based and must be determined from the data tables, as described in the Users' guide (see Section 1.4). 4.8.5 EXPOSURE_TYPE Depending on the epoch, during the descent (mission time, altitude, descent cycle, etc.) exposure times are either manually selected (i.e. preprogrammed into the flight software) or automatically (dynamically) selected by the flight software (automatic). In general observation exposures are automatically determined based on the data accumulation rate (i.e. DN/second) experienced by prior exposures at the same azimuth relative to the Sun for the same type of observation (image, SA, Ir, etc). For the CCD instruments (Imagers, Visible Spectrometer, Solar Aureole Camera) the software targets the mean exposure to be half of the saturation limit, while simultaneously limiting the number of pixels that are saturated (to less than a few percent). For the IR system the collection of samples into azimuth bins relative to the Sun are optimized in the auto-exposure case. Only for a few descent cycles (calibration, etc) are the exposures fixed. The EXPOSURE_TYPE element conveys whether the data exposure times are dynamically determined (AUTO) or pre-set in the flight software (MANUAL). 4.8.6 SPACECRAFT_ALTITUDE_START & SPACECRAFT_ALTITUDE_END These keywords report the probe's altitude in kilometers above the Huygens landing site (assuming a 2575 km spherical body), at the beginning of the observation and at the end of the observation. These values are based on the Descent Trajectory Working Group's (DTWG) reconstruction from June of 2011. 4.8.7 PREDICTED_ALTITUDE The real-time altitude (km) as predicted by the Huygens probe and relayed to the instrument via the Descent Data Broadcast (DDB). It is off by more than 10 km at some altitudes (see section 4.8.6), but was the information used by the DISR flight software to make observation decisions. 4.8.8 AZIMUTH_START & AZIMUTH_END The direction the instrument is viewing relative to the sun's position in the sky at the beginning and end of the observation. The angle is defined as the direction of the instrument's bore-sight vector (i.e. the direction it is looking) relative to the vector from the sub-instrument point to the sun, with both vectors projected on a plane tangent to the surface at the sub-instrument point. The angle is counter clockwise positive, viewed from above (from zenith), in keeping with the intended rotation direction of the Huygens probe. These values are from the descent reconstruction performed by Erich Karkoschka in March 2013, and are similar to 1% of the values published in PSS in 2007 (Karkoschka). 4.8.9 AZIMUTH_NORTH_START & AZIMUTH_NORTH_END The direction the instrument is viewing relative to North at the beginning and end of the observation. This angle is defined as the direction of the instrument's bore-sight vector (i.e. the direction it is looking) relative to the planets positive spin vector (RHR), with both vectors projected on a plane tangent to the surface at the sub-instrument point. It is positive clockwise, viewed from above, as in a compass heading. Same source as 4.8.8. 4.8.10 SPIN_RATE The approximate average spin rate over the time of the observation, in Revolutions Per Minute (RPM). It is derived from a functional fit of the instantaneous spin rate, calculated from changes in azimuth (from the same source as 4.8.8). The sense of the rotation is counterclockwise (CCW), positive (viewed from above) in keeping with the original spin intention of the probe. The spin rate is important in deciphering the sense of the azimuth change (and thus viewing direction) during the observation. 4.8.11 ROTATIONS The number of probe rotations during the observation is based on the average spin rate (see 4.8.10). It is important for observations with long exposure times (such as the IR measurements) in order to trace the azimuth history. Its direction is the same as the spin, CCW positive as viewed from Zenith. One rotation (or revolution) is 360 degs or 2p radians. 4.8.12 SPIN_RATE_START & SPIN_RATE_END In contrast with the SPIN_RATE described in section 4.8.10, these keywords contain our best reconstructed values for the instantaneous spin rate at the start and end of the observation (in RPM), derived from the azimuth information described in section 4.8.8. The sense is CCW positive as viewed from above. This information is valuable in determining azimuthal smear of the observation. 4.8.13 HYUGENS:EW_TILT_ANGLE_START and ..._END The tilt of the Huygens probe spin axis at the start and end of the observation in the east/west direction. The tilt is measured relative to the Zenith vector in the east/west, latitudinal plane in degrees. Positive tilt is defined as the spin vector being East of Zenith (i.e. the parachute being east of the probe). 4.8.14 LAMP_STATE The DISR instrument has 3 on-board incandescent calibration lamps (used to check the detectors), and one 20 watt external lamp (designed to observe Titan's surface). The LAMP_STATE keyword conveys the state (on vs. off) for each of these 4 lamps. The four characters presented are binary indicators, one for each lamp in the order: Cal#1, Cal#2, Cal#3, & SSL (Surface Science Lamp). The calibration lamps are all used together during the 4 calibration cycles executed during the descent. The LAMP_STATE when the 3 calibration lamp are on (and the SSL off) is: "1110". The SSL is turned on when the probe altitude is below about 600 meters. When the SSL is on (and the calibration lamps are off) the LAMP_STATE is "0001". 4.8.15 NULL_PIXEL_2 & NULL_PIXEL_3 Readout of covered pixels on the CCD chip which are needed to determine the dark current offset for the observation. During the observation, the flight software averages the values of covered CCD columns 2 & 3, multiplies the result by 4 and transmits that as the values for NULL_PIXEL_2 & NULL_PIXEL_3. Their use in determining the dark current offset is described in section 5.7 of the DISR Archive Users' Guide (in the DOCUMENTS section of the archive). 4.8.16 NATIVE_START_TIME & NATIVE_STOP_TIME These are the same as the SPACECRAFT_CLOCK_START_COUNT and SPACECRAFT_CLOCK_STOP_COUNT. See section 4.8.3. 4.8.17 MEASUREMENT_TYPE MEASUREMENT_TYPE distinguishes between directional view, and readout formats for the DISR's sub-instruments. Below is a list of the possible values for this keyword. See the Users' Guide for more details. "UHH": The Upper Half of the High resolution imager. "UHM": The Upper Half of the Medium resolution imager. "UHS": The Upper Half of the Side-looking imager. "LHH": The Lower Half of the High resolution imager. "LHM": The Lower Half of the Medium resolution imager. "LHS": The Lower Half of the Side-looking imager. "DLV": The Downward Looking Violet photometer. "ULV": The Upward Looking Violet photometer. "DLIS": The Downward Looking Infrared Spectrometer. "ULIS": The Upward Looking Infrared Spectrometer. "IR_COMB": The InfraRed spectrometers Combined, up and down in one dataset. "IR_LONG": The InfraRed spectrometers with LONG integration time. "STRIP": The side looking imager STRIP measurement. "SA": The Solar Aureole camera. "NS_DLVS": The Near Surface Downward Looking Visible Spectrometer format. "DLVS": Downward Looking Visible Spectrometer. "ULVS": Upward Looking Visible Spectrometer. "DARK" CCD covered pixel DARK current data. "MRI": Medium Resolution Imager, (176 by 256 pixels). "SLI": Side-Looking Imager, (128 by 256 pixels). "HRI": High Resolution Imager (160 by 256 pixels). "DLVS_EX": EXtra columns from the Downward Looking Visible Spectrometer. "ULVS_EX": EXtra columns from the Upward Looking Visible Spectrometer. 5.0 Sample Labels 5.1 DARK LABEL PDS_VERSION_ID = PDS3 LABEL_REVISION_NOTE = "Thu Jan 09 23:28:28 2014 , C. See" RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 25 FILE_RECORDS = 257 ^HEADER = ("DARK_0001_00191_S_140_KM.TAB",1) ^TABLE = ("DARK_0001_00191_S_140_KM.TAB",2) DATA_SET_ID = "HP-SSA-DISR-2/3-EDR/RDR-V1.1" PRODUCT_ID = "DARK_0001_MTIME_00_03_10_5941_DISR" SEQUENCE_NUMBER = 0001 PRODUCT_CREATION_TIME = 2014-01-09T23:28:28 /*UTC*/ MISSION_NAME = "CASSINI-HUYGENS" INSTRUMENT_HOST_NAME = "HUYGENS PROBE" INSTRUMENT_HOST_ID = HP TARGET_NAME = TITAN MISSION_PHASE_NAME = DESCENT INSTRUMENT_ID = DISR INSTRUMENT_NAME = "DESCENT IMAGER SPECTRAL RADIOMETER" INSTRUMENT_TYPE = {"IMAGER","RADIOMETER","SPECTROMETER"} PRODUCER_ID = DISR PRODUCER_INSTITUTION_NAME = "UNIVERSITY OF ARIZONA" PRODUCER_FULL_NAME = "CHARLES (CHUCK) SEE" PRODUCT_TYPE = EDR START_TIME = 2005-01-14T09:13:31.594 /*UTC*/ STOP_TIME = 2005-01-14T09:13:31.604 /*UTC*/ SPACECRAFT_CLOCK_START_COUNT = 190.594 /* DDB time in seconds.fff */ SPACECRAFT_CLOCK_STOP_COUNT = 190.604 /* DDB time in seconds.fff */ FILE_NAME = "DARK_0001_00191_S_140_KM.TAB" EXPOSURE_DURATION = 10.0000 EXPOSURE_TYPE = MANUAL SPACECRAFT_ALTITUDE_START = 140.343 /* Reconstruction, Note 1 */ SPACECRAFT_ALTITUDE_END = 140.343 AZIMUTH_START = 33.39 /* CCW From Sun, Note 3 */ AZIMUTH_END = 33.66 AZIMUTH_NORTH_START = 79.39 /* CW From North, Note 4 */ AZIMUTH_NORTH_END = 79.12 HUYGENS:EW_TILT_ANGLE_START = 3.54 /* + for East tip, Note 6 */ HUYGENS:EW_TILT_ANGLE_END = 3.54 INSTRUMENT_TEMPERATURE = (259.06, "UNK", 270.37, 270.89, 266.92, 258.72, 264.13, 269.44, 275.59, 274.38, 286.88) /* KELVIN */ INSTRUMENT_TEMPERATURE_POINT = ("CCD_T1","REF_T2","IRB_T3", "IRE_T4","CCDLUG_T5","STRAP_T6", "OPTICS_T7","VIOLET_T8","SH_AUX_T9", "SH_BOX_T10","EA_BOX_T11") LAMP_STATE = 0000 NULL_PIXEL_2 = 86.0000 NULL_PIXEL_3 = 81.0000 NATIVE_START_TIME = 190.5941 NATIVE_STOP_TIME = 190.6041 DESCRIPTION = " These are the counts in the covered (dark) CCD columns during the Titan descent. The datasets contain two numbers per row: 1) the sum of CCD columns 7 & 8, and 2) the sum of CCD columns 9 & 10. This data is used to determine the CCD dark current rate (DN/sec.) vs. mission time (and ergo Temperature). Typically one dataset is taken on each descent cycle (see section 5.7 of the DISR Users Guide). A summary of the Dark datasets is presented in Guide appendix 24. Notes: 1) The altitudes are from the DTWG release in June of 2011. 2) The probe azimuth & tilt are updated to the March 2013 Karkoschka analysis. 3) AZIMUTH... is degrees counter clockwise from the Sun, viewed from Nadir. 4) AZIMUTH_NORTH... is degrees clockwise from North, as viewed from Nadir. 5) These data are from ESOC stream 524(b). 6) Positive tilt is parachute East of probe (spin axis tipped East) 7) Temperatures are reported at the mid point (in time) of the observation. A list of the header entries from the source XDR format file are shown below for reference. The official label data (above) takes precedence over any conflicting information presented below (i.e. azimuths, temps., etc): filename_pre: C:\df3\15Jan05\Log\524B\DB2\Dark\ filename: V_00001K_MMX_00%03%10_5941_Drk dimensions: 2 num_cols: 2 num_rows: 256 data_type: 2, 16 bit integer date_replayed: Wed Feb 09 11:08:33 2005 set_name: Dark ccd_t1: 259.10 detector: CCD CCD_id_no: 93.00 ms exp_time: 10.00 ms coord_x col2: 10 coord_y col2: 0 coord_x col1: 8 coord_y col1: 0 gse_ver: Windows_GSE test_log: C:\df3\15Jan05\ESOC_Files units: C:\df3\15Jan05\ESOC_Files\o524sd__.1h_ set_id: 14 (DARK) seq_num: 1 m_time: 190.59 seconds cycle_num: 1 dataset type: 18 (DARK) DDB altitude: 148.852 km target azimuth: 180.000 deg predicted azimuth: 89.910 deg lamp states: 0000 ccd_stat: 0 ccd_flag: 1110 proc_flag: 111000 bad_pixels: replaced summing: summed S/W Compression: compressed Square Root Proc: not square rooted H/W Compression: not compressed Exposure Control: manual cols_sent: 2 null_col2: 86 null_col3: 81 thermistor_I: 0.0 ccdlug_t5: 261.6 strap_t: 258.9 optics_t: 264.2 violet_t: 263.9 SH_aux_t: 275.7 SH_box_t: 274.2 EA_box_t: 287.1 Aux_volt: 11.9 cpu_volt: 5.0 adc_offset: 0.0 disp_q_size: 6 alarm_q_size: 10 tlm_q_size: 0 sci_pro_q: 5 stack_size: 1471 comp_ratio: 4 disr_model: DISR3 Pixel min, max & mean (0 to 8190): 25, 168, 101.81 " OBJECT = HEADER HEADER_TYPE = TEXT BYTES = 25 ROW_BYTES = 25 RECORDS = 1 INTERCHANGE_FORMAT = ASCII DESCRIPTION = "The first line of the file contains titles for the table columns: Row Number, Sum of CCD columns 7 & 8, and Sum of CCD columns 9 & 10" END_OBJECT = HEADER OBJECT = TABLE INTERCHANGE_FORMAT = ASCII COLUMNS = 3 ROWS = 256 ROW_BYTES = 25 DESCRIPTION = "TWO SUMMED COLUMNS OF DARK VALUES FROM THE CCD" OBJECT = COLUMN NAME = "ROW" COLUMN_NUMBER = 1 UNIT = "N/A" DATA_TYPE = INTEGER START_BYTE = 1 BYTES = 4 FORMAT = "I4" DESCRIPTION = "ROW NUMBER" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DARK1" COLUMN_NUMBER = 2 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 5 BYTES = 10 FORMAT = "I10" DESCRIPTION = "THE SUM OF CCD COLUMNS 7 & 8" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DARK2" COLUMN_NUMBER = 3 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 15 BYTES = 10 FORMAT = "I10" DESCRIPTION = "THE SUM OF CCD COLUMNS 9 & 10" END_OBJECT = COLUMN END_OBJECT = TABLE END SAMPLE DARK DATA PRINTOUT... Row Col 7+8 Col 9+10 1 27 25 2 35 32 3 36 33 4 36 35 5 37 36 6 40 36 7 40 38 8 40 37 9 41 37 to row: 256 5.2 DESCENT LABEL PDS_VERSION_ID = PDS3 LABEL_REVISION_NOTE = "Thu Jan 02 04:34:17 2014 , C. See" RECORD_TYPE = STREAM RECORD_BYTES = 70 FILE_RECORDS = 32 ^TEXT = "DCYCLE_0100_08852_S_0078_M.TXT" DATA_SET_ID = "HP-SSA-DISR-2/3-EDR/RDR-V1.1" PRODUCT_ID = "DESCENT_0100_MTIME_02_27_31_8075_DISR" SEQUENCE_NUMBER = 0100 PRODUCT_CREATION_TIME = 2014-01-02T04:34:17 /*UTC*/ MISSION_NAME = "CASSINI-HUYGENS" INSTRUMENT_HOST_NAME = "HUYGENS PROBE" INSTRUMENT_HOST_ID = HP TARGET_NAME = TITAN MISSION_PHASE_NAME = DESCENT INSTRUMENT_ID = DISR INSTRUMENT_NAME = "DESCENT IMAGER SPECTRAL RADIOMETER" INSTRUMENT_TYPE = {"IMAGER","RADIOMETER","SPECTROMETER"} PRODUCER_ID = DISR PRODUCER_INSTITUTION_NAME = "UNIVERSITY OF ARIZONA" PRODUCER_FULL_NAME = "CHARLES (CHUCK) SEE" PRODUCT_TYPE = EDR START_TIME = 2005-01-14T11:37:52.808 /*UTC*/ STOP_TIME = 2005-01-14T11:37:54.519 /*UTC*/ SPACECRAFT_CLOCK_START_COUNT = 8851.808 /* DDB time in seconds.fff */ SPACECRAFT_CLOCK_STOP_COUNT = 8853.519 /* DDB time in seconds.fff */ FILE_NAME = "DCYCLE_0100_08852_S_0078_M.TXT" DESCENT_CYCLE_NAME = VERY_LOW_NEAR_SURFACE SPACECRAFT_ALTITUDE_START = 0.081 /* Reconstruction, Note 1 */ SPACECRAFT_ALTITUDE_END = 0.074 AZIMUTH_START = 27.53 /* CCW From Sun, Note 3 */ AZIMUTH_END = 16.74 AZIMUTH_NORTH_START = 87.51 /* CW From North, Note 4 */ AZIMUTH_NORTH_END = 98.30 SPIN_RATE_START = -1.09 /* CCW Positive, Note 8 */ SPIN_RATE_END = -1.09 /* CCW Positive, Note 8 */ ROTATIONS = -0.03 /* CCW +, Note 8 */ INSTRUMENT_TEMPERATURE = (170.30, "UNK", 189.55, 189.57, 173.30, 172.19, 165.79, 153.45, 234.04, 204.59, 288.13) /* KELVIN */ INSTRUMENT_TEMPERATURE_POINT = ("CCD_T1","REF_T2","IRB_T3", "IRE_T4","CCDLUG_T5","STRAP_T6", "OPTICS_T7","VIOLET_T8","SH_AUX_T9", "SH_BOX_T10","EA_BOX_T11") NATIVE_START_TIME = 8851.8076 NATIVE_STOP_TIME = 8853.5186 DESCRIPTION = " The descent cycles datasets contain information about the descent data cycle being executed. Dynamic parameters (altitude, spin, & azimuth) are recorded at the start of the cycle, and are reported in the archive as estimates (i.e. Estimated_Spin) in contrast to the post-encounter reconstructed information, which is also reported (i.e. Starting_Spin). The parameters actually reported in the descent dataset are: Cycle_Number, Start_Time, Estimated_Azimuth, Estimated_Altitude, Estimated_Spin, Scenario_Step, Cycle_Type, SPM_Flag, CCD_Measurements, IR_Measurements and Violet_Measurements. Notes: 1) The altitudes are from the DTWG release in June of 2011. 2) The probe azimuth & tilt are updated to the March 2013 Karkoschka analysis. 3) AZIMUTH... is degrees counter clockwise from the Sun, viewed from Nadir. 4) AZIMUTH_NORTH... is degrees clockwise from North, as viewed from Nadir. 5) These data are from ESOC stream 524(b). 6) Positive tilt is parachute East of probe (spin axis tipped East) 7) Temperatures are reported at the mid point (in time) of the observation. 8) ROTATIONS are approximate & are based on the local average spin rate. A list of the header entries from the source XDR format file are shown below for reference. The official label data (above) takes precedence over any conflicting information presented below (i.e. azimuths, temps., etc): filename_pre: C:\df3\15Jan05\Log\524B\DB2\Descent\ filename: V_00100D_MMX_02%27%31_8075_Dst dimensions: 0 num_cols: 0 num_rows: 0 data_type: 0 (null) date_replayed: Wed Feb 09 11:08:33 2005 engineer: Chuck See set_name: Descent ccd_t1: 170.20 CCD_id_no: 93 gse_ver: Windows_GSE test_log: C:\df3\15Jan05\ESOC_Files units: C:\df3\15Jan05\ESOC_Files\o524sd__.1h_ set_id: 8 seq_num: 100 m_time: 8851.81 seconds Cycle type: 14 (Very low near surface) cycle_num: 100 scen_step: 24 spm_flag: 0 CCD_set_no: 11 IR_set_no: 5 VIOLET_set_no: 4 cycle start az: 45.700 deg CCW of sun DDB altitude: 0.110 km thermistor_current: 0.002046 amps ccdlug_t5: 173.2 deg. K strap_t: 172.2 deg. K optics_t: 165.8 deg. K violet_t: 153.4 deg. K SH_aux_t: 234.0 deg. K SH_box_t: 204.6 deg. K EA_box_t: 288.1 deg. K Aux_volt: 11.9 volts cpu_volt: 4.9 volts adc_offset: 0.0 volts disp_q_size: 8 alarm_q_size: 11 tlm_q_size: 0 sci_pro_q: 5 stack_size: 1217 disr_model: DISR3 " OBJECT = TEXT RECORD_BYTES = 70 FILE_RECORDS = 32 NOTE = "DISR DESCENT DATASET" PUBLICATION_DATE = 2014-01-02 INTERCHANGE_FORMAT = ASCII END_OBJECT = TEXT END SAMPLE DESCENT DATA PRINTOUT... Stream: 524B\DB2 Original_Filename: V_00100D_MMX_02%27%31_8075_Dst Date_Taken: 2005-01-14T11:37:52.808 Cycle_Number: 100 Cycle_Type: 14 (Very low near surface) Start_Time: 8851.81 seconds after T0 End_Time*: 8853.52 seconds after T0 Cycle_Length*: 1.71 seconds Scenario_Step: 24 (from cycle criteria table) SPM_flag: 0 (Spectrophotometric cycle flag) Predicted_Altitude: 0.110 (Kilometers) Starting_Altitude*: 0.081 (Kilometers) Ending_Altitude*: 0.074 (Kilometers) Predicted_Azimuth: 45.7 (Deg CCW from Sun) Starting_Azimuth*: 27.5 (Deg CCW from Sun) Ending_Azimuth*: 16.7 (Deg CCW from Sun) Starting_Compass*: 87.5 (Deg CW from North) Ending_Compass*: 98.3 (Deg CW from North) Predicted_Spin: 1.5 (RPM) Starting_Spin*: -1.1 (RPM) Ending_Spin*: -1.1 (RPM) Revolutions_Approx*: -0.0 (Revs) CCD_Measurement 11 (ID number of CCD measurement set) IR_Measurement 5 (ID number of IR measurement set) Violet_Measurement 4 (ID number of Violet measurement set) *=post mission reconstruction 5.3 HOUSEKEEPING LABEL PDS_VERSION_ID = PDS3 LABEL_REVISION_NOTE = "Sat Dec 28 22:15:39 2013 , C. See" RECORD_TYPE = STREAM RECORD_BYTES = 70 FILE_RECORDS = 32 ^TEXT = "HKEEPN_0001_00282_S_136_KM.TXT" DATA_SET_ID = "HP-SSA-DISR-2/3-EDR/RDR-V1.1" PRODUCT_ID = "HKEEPN_0001_MTIME_00_04_42_0074_DISR" SEQUENCE_NUMBER = 0001 PRODUCT_CREATION_TIME = 2013-12-28T22:15:39 /*UTC*/ MISSION_NAME = "CASSINI-HUYGENS" INSTRUMENT_HOST_NAME = "HUYGENS PROBE" INSTRUMENT_HOST_ID = HP TARGET_NAME = TITAN MISSION_PHASE_NAME = DESCENT INSTRUMENT_ID = DISR INSTRUMENT_NAME = "DESCENT IMAGER SPECTRAL RADIOMETER" INSTRUMENT_TYPE = {"IMAGER","RADIOMETER","SPECTROMETER"} PRODUCER_ID = DISR PRODUCER_INSTITUTION_NAME = "UNIVERSITY OF ARIZONA" PRODUCER_FULL_NAME = "CHARLES (CHUCK) SEE" PRODUCT_TYPE = EDR START_TIME = 2005-01-14T09:15:03.007 /*UTC*/ STOP_TIME = 2005-01-14T09:15:03.007 /*UTC*/ SPACECRAFT_CLOCK_START_COUNT = 282.007 /* DDB time in seconds.fff */ SPACECRAFT_CLOCK_STOP_COUNT = 282.007 /* DDB time in seconds.fff */ FILE_NAME = "HKEEPN_0001_00282_S_136_KM.TXT" SPACECRAFT_ALTITUDE_START = 135.934 SPACECRAFT_ALTITUDE_END = 135.934 AZIMUTH_START = 340.53 /* CCW From Sun, Note 3 */ AZIMUTH_END = 340.53 AZIMUTH_NORTH_START = 132.31 /* CW From North, Note 4 */ AZIMUTH_NORTH_END = 132.31 HUYGENS:EW_TILT_ANGLE_START = 0.00 /* + for East tip, Note 6 */ HUYGENS:EW_TILT_ANGLE_END = 0.00 SPIN_RATE_START = 2.98 /* CCW Positive, Note 7 */ SPIN_RATE_END = 2.98 /* CCW Positive, Note 7 */ INSTRUMENT_TEMPERATURE = (259.59, "UNK", 271.14, 271.47, 261.81, 259.02, 264.19, 263.79, 275.71, 274.02, 287.24) /* KELVIN */ INSTRUMENT_TEMPERATURE_POINT = ("CCD_T1","REF_T2","IRB_T3", "IRE_T4","CCDLUG_T5","STRAP_T6", "OPTICS_T7","VIOLET_T8","SH_AUX_T9", "SH_BOX_T10","EA_BOX_T11") NATIVE_START_TIME = 282.0074 NATIVE_STOP_TIME = 282.0074 DESCRIPTION = " The housekeeping cycles datasets contain temperature, voltage and software information about the DISR instrument. Housekeeping data is collected at the start of each descent cycle. Notes: 1) The altitudes are from the DTWG release in June of 2011. 2) The probe azimuth & tilt are updated to the March 2013 Karkoschka analysis. 3) AZIMUTH... is degrees counter clockwise from the Sun, viewed from Nadir. 4) AZIMUTH_NORTH... is degrees clockwise from North, as viewed from Nadir. 5) These data are from ESOC stream 524(b). 6) Positive tilt is parachute East of probe (spin axis tipped East) 7) Probe SPIN_RATE is the local average spin rate at the start of the cycle. A list of the header entries from the source XDR format file are shown below for reference. The official label data (above) takes precedence over any conflicting information presented below (i.e. azimuths, temps., etc): filename_pre: C:\df3\15Jan05\Log\524B\DB2\HKeeping\ filename: V_00001H_MMX_00%04%42_0074_Hkp dimensions: 0 num_cols: 0 num_rows: 0 data_type: 0 (null) date_replayed: Wed Feb 09 11:08:33 2005 engineer: Chuck See set_name: HKeeping ccd_t1: 259.50 detector: AUX CCD_id_no: 93 gse_ver: Windows_GSE test_log: C:\df3\15Jan05\ESOC_Files units: C:\df3\15Jan05\ESOC_Files\o524sd__.1h_ set_id: 06 seq_num: 0001 m_time: 282.01 seconds thermistor_current: 0.002046 amps ccdlug_t5: 261.8 deg. K strap_t: 259.0 deg. K optics_t: 264.2 deg. K violet_t: 263.8 deg. K SH_aux_t: 275.7 deg. K SH_box_t: 274.0 deg. K EA_box_t: 287.2 deg. K Aux_volt: 11.9 volts cpu_volt: 5.0 volts adc_offset: 0.0 volts disp_q_size: 6 alarm_q_size: 10 tlm_q_size: 0 sci_pro_q: 5 stack_size: 1471 disr_model: DISR3 " OBJECT = TEXT RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 80 FILE_RECORDS = 27 NOTE = "DISR HOUSEKEEPING DATASET" PUBLICATION_DATE = 2013-12-28 INTERCHANGE_FORMAT = ASCII END_OBJECT = TEXT END SAMPLE HKEEPING DATA PRINTOUT... Stream: 524B\DB2 Original_Filename: V_00001H_MMX_00%04%42_0074_Hkp Date_Taken: 2005-01-14T09:15:03.007 Set_Name: HKeeping GSE_Version: Windows_GSE Sequence_No.: 0001 Mission_Time: 282.01 seconds after T0 Thermistor_Current: 0.002046 (amps) CCD_Temp_t1: 259.50 degK CCD_Lug_Temp_t5: 261.80 degK Thermal_Strap_t6: 259.02 degK Optical_Bench_t7: 264.19 degK Violet_Detector_t8: 263.79 degK Sensor_Head_Aux_t9: 275.71 degK Sensor_Head_Box_t10 274.02 degK Electronics_Box_t11 287.24 degK Aux_Board_Voltage: 11.9311 volts CPU_Board_Voltage: 4.9651 volts ADC_Offset: 0.002440 volts Display_Queue_size: 6 Alarm_Queue_size: 10 Telemetry_Queue_siz 0 Sci_Processing_Q_si 5 Stack_size: 1471 5.4 IMAGE TABLE LABEL PDS_VERSION_ID = PDS3 LABEL_REVISION_NOTE = "Sat Jan 11 00:05:25 2014 , C. See" RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 1029 FILE_RECORDS = 259 ^HEADER = ("IMAGE_0002_00144_S_143_KM.TAB",1) ^TABLE = ("IMAGE_0002_00144_S_143_KM.TAB",4) DATA_SET_ID = "HP-SSA-DISR-2/3-EDR/RDR-V1.1" PRODUCT_ID = "IMAGE_0002_MTIME_00_02_23_5790_DISR" SEQUENCE_NUMBER = 0002 IMAGE_ID = SLI PRODUCT_CREATION_TIME = 2014-01-11T00:05:25 /*UTC*/ MISSION_NAME = "CASSINI-HUYGENS" INSTRUMENT_HOST_NAME = "HUYGENS PROBE" INSTRUMENT_HOST_ID = HP TARGET_NAME = TITAN MISSION_PHASE_NAME = DESCENT INSTRUMENT_ID = DISR INSTRUMENT_NAME = "DESCENT IMAGER SPECTRAL RADIOMETER" INSTRUMENT_TYPE = {"IMAGER","RADIOMETER","SPECTROMETER"} PRODUCER_ID = DISR PRODUCER_INSTITUTION_NAME = "UNIVERSITY OF ARIZONA" PRODUCER_FULL_NAME = "CHARLES (CHUCK) SEE" PRODUCT_TYPE = EDR START_TIME = 2005-01-14T09:12:44.579 /*UTC*/ STOP_TIME = 2005-01-14T09:12:44.586 /*UTC*/ SPACECRAFT_CLOCK_START_COUNT = 143.579 /* DDB time in seconds.fff */ SPACECRAFT_CLOCK_STOP_COUNT = 143.586 /* DDB time in seconds.fff */ FILE_NAME = "IMAGE_0002_00144_S_143_KM.TAB" EXPOSURE_DURATION = 7.00000 EXPOSURE_TYPE = AUTO PREDICTED_ALTITUDE = 152.669 /* Real-Time from DDB */ SPACECRAFT_ALTITUDE_START = 142.775 /* Reconstruction, Note 1 */ SPACECRAFT_ALTITUDE_END = 142.775 AZIMUTH_START = 157.44 /* CCW From Sun, Note 3 */ AZIMUTH_END = 157.65 AZIMUTH_NORTH_START = 315.31 /* CW From North, Note 4 */ AZIMUTH_NORTH_END = 315.10 HUYGENS:EW_TILT_ANGLE_START = 9.76 /* + for East tip, Note 6 */ HUYGENS:EW_TILT_ANGLE_END = 9.76 SPIN_RATE = 5.04 /* CCW Positive, Note 8 */ INSTRUMENT_TEMPERATURE = (258.81, "UNK", 269.98, 270.59, 266.12, 258.56, 264.10, 269.57, 275.53, 274.56, 286.70) /* KELVIN */ INSTRUMENT_TEMPERATURE_POINT = ("CCD_T1","REF_T2","IRB_T3", "IRE_T4","CCDLUG_T5","STRAP_T6", "OPTICS_T7","VIOLET_T8","SH_AUX_T9", "SH_BOX_T10","EA_BOX_T11") LAMP_STATE = 0000 NULL_PIXEL_2 = 79.0000 NULL_PIXEL_3 = 76.0000 NATIVE_START_TIME = 143.5790 NATIVE_STOP_TIME = 143.5860 DESCRIPTION = " This is data from the DISR imagers. Three imagers take simultaneous exposures. The Side Looking Imager (SLI) views from 96 down to 45 deg from Nadir. The Medium Resolution Imager (MRI) views from 45 to 16 deg from Nadir. And, the High Resolution Imager (HRI) views from 21 to 6 deg Nadir. The composite image covers ~25 deg of azimuth. The tables are rotated 180 deg relative to the observed scene (top is most nadir & left is right). The tables present the per-pixel photometric reading reconstructed from the Discrete Cosine Transform (DCT) coefficients that were transmitted to Earth. The values are scaled from zero to 519,168 DN (~12 bits *128) A few of the images taken on Titans surface have saturated or missing pixels. Saturated pixels have a value of 519,168 DN. Missing pixels have a value of zero, and are usually in contiguous 16 x 16 pixel blocks (missing packets). Pixel values can be found in the corresponding image table under: DATA/IMAGE/TABLE_FORMAT. The MRIs exhibit a changed responsivity on the top rows of the image, due to an error in the on-board flat field (see Users Guide, sect. 5.8). Notes: 1) The altitudes are from the DTWG release in June of 2011. 2) The probe azimuth & tilt are updated to the March 2013 Karkoschka analysis. 3) AZIMUTH... is degrees counter clockwise from the Sun, viewed from Nadir. 4) AZIMUTH_NORTH... is degrees clockwise from North, as viewed from Nadir. 5) These data are from ESOC stream 524(b). 6) Positive tilt is parachute East of probe (spin axis tipped East) 7) Temperatures are reported at the mid point (in time) of the observation. 8) SPIN_RATE is approximate & based on the local average spin rate, CCW postiv. A list of the header entries from the source XDR format file are shown below for reference. The official label data (above) takes precedence over any conflicting information presented below (i.e. azimuths, temps., etc): filename_pre: C:\df3\15Jan05\Log\524B\DB2\Image15\ original_filename: V_00002I_MMX_00%02%23_5790_Img dimensions: 2 num_cols: 128 num_rows: 256 data_type: 3, 32 bit integer date_replayed: Wed Feb 09 11:08:33 2005 engineer: Chuck See set_name: Image ccd_t1: 258.70 Kelvin detector: CCD CCD_id_no: 93 exp_time: 7.00 ms coord_x col1: 361 gse_ver: Windows_GSE test_log: stream_524b\DB2\Image15 ESOC_File: C:\df3\15Jan05\ESOC_Files\o524sd__.1h_ set_id: 11 (IMAGE) seq_num: 2 m_time: 143.58 seconds after T0 cycle_num: 1 dataset type: 22 (SLI) DDB altitude: 152.669 km target azimuth: 152.000 deg CCW Sun predicted azimuth: 151.070 deg CCW Sun lamp states: 0000 (C1 C2 C3 SSL),cr ;(h,102) ccd_stat: 0 dcs_stat: 1 ccd_flag: 1110 proc_flag: 100111 bad_pixels: replaced summing: unsummed S/W Compression: not compressed Square Root Proc: square rooted H/W Compression: compressed Exposure Control: automatic cols_sent: 128 null_col2: 79 DN null_col3: 76 DN ccd_tgt_pct: 60 ccd_prctile: 97 thermistor_I: 2.0460 mA ccdlug_t5: 261.6 Kelvin strap_t: 258.9 Kelvin optics_t: 264.2 Kelvin violet_t: 264.0 Kelvin SH_aux_t: 275.7 Kelvin SH_box_t: 274.2 Kelvin EA_box_t: 287.1 Kelvin Aux_volt: 11.9 Volts cpu_volt: 5.0 Volts adc_offset: 2.4 mV disp_q_size: 6 alarm_q_size: 10 tlm_q_size: 0 sci_pro_q: 5 stack_size: 1471 comp_ratio: 29 (Words in dataset)/(# Pixels*2) disr_model: DISR3 sqrt_min (12 bit): 286 DN sqrt_max (12 bit): 1738 DN Pixel min, max & mean (range: 0 to 519,168 DN): 3364, 196529, 147881.08 " OBJECT = HEADER HEADER_TYPE = TEXT BYTES = 1029 RECORDS = 3 INTERCHANGE_FORMAT = ASCII DESCRIPTION = "The first 3 lines of the file contain info about the measurement and the table layout." END_OBJECT = HEADER OBJECT = TABLE INTERCHANGE_FORMAT = ASCII COLUMNS = 129 ROWS = 256 ROW_BYTES = 1029 DESCRIPTION = "Table of pixel values from the DISR camera image taken during the Titan Descent. In raw DN. Scaled from min=0 to max=519,168. Inverted (up vs. down) relative to Descent Attitude. SLI Imager." OBJECT = COLUMN NAME = "ROW" COLUMN_NUMBER = 1 UNIT = "N/A" DATA_TYPE = INTEGER START_BYTE = 1 BYTES = 4 FORMAT = "I4" DESCRIPTION = "ROW NUMBERS" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DATA COLUMN 0" COLUMN_NUMBER = 2 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 5 BYTES = 8 FORMAT = "I8" DESCRIPTION = "Imager pixel reading in range 0 TO 519,168 DN" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DATA COLUMN 1" COLUMN_NUMBER = 3 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 13 BYTES = 8 FORMAT = "I8" DESCRIPTION = "Imager pixel reading in range 0 TO 519,168 DN" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DATA COLUMN 2" COLUMN_NUMBER = 4 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 21 BYTES = 8 FORMAT = "I8" DESCRIPTION = "Imager pixel reading in range 0 TO 519,168 DN" END_OBJECT = COLUMN . . . . . . OBJECT = COLUMN NAME = "DATA COLUMN 126" COLUMN_NUMBER = 128 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 1013 BYTES = 8 FORMAT = "I8" DESCRIPTION = "Imager pixel reading in range 0 TO 519,168 DN" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DATA COLUMN 127" COLUMN_NUMBER = 129 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 1021 BYTES = 8 FORMAT = "I8" DESCRIPTION = "Imager pixel reading in range 0 TO 519,168 DN" END_OBJECT = COLUMN END_OBJECT = TABLE END SAMPLE IMAGE TABLE DATA PRINTOUT... Table of DISR image pixel data (DN) for SLI image number: 2 COLUMNS... ROW 1 2 3 4 5 6 7 8 9 ... 1 3750 3406 3511 3364 3595 3655 3406 4050 3832 ... 2 62634 63330 63576 63876 63444 63012 63024 63948 63762 ... 3 70485 70275 69862 70282 69729 70191 70275 69785 69911 4 72968 73168 72872 72976 72984 73080 72584 72904 72840 5 73808 74124 73728 74152 73792 73328 73536 73920 74558 6 74890 74264 74047 75220 74970 75155 76545 78737 79295 7 77208 76328 77840 80573 82643 85628 85058 85178 85618 8 76342 77952 83558 86778 86638 86868 86838 87438 88228 9 78872 85038 88198 87288 87158 87328 88618 88088 88818 10 87038 89778 90488 89738 88248 88068 89848 90318 89628 11 90858 91739 91158 90258 89828 92201 90318 89828 90968 12 91268 91168 91408 93188 91588 91458 90748 91618 92229 13 90628 92089 91746 92964 92215 91753 92229 91178 91208 14 92901 92495 92313 93602 94367 92271 92432 93674 93181 15 93926 93593 94286 93512 94502 94652 93503 95240 94583 16 94652 96344 97988 95744 95444 97220 95492 97184 94880 17 95816 95996 96224 96344 96236 95936 95552 95288 95252 18 96224 96392 96620 96752 96680 96392 96056 95804 95780 19 96968 97136 97364 97508 97460 97232 96944 96740 96740 20 97916 98084 98300 98456 98456 98300 98072 97928 97952 21 98948 99092 99308 99476 99512 99416 99272 99176 99212 22 99956 100076 100256 100412 100484 100460 100376 100340 100376 23 100868 100952 101096 101228 101312 101336 101324 101312 101336 24 101684 101744 101828 101924 101996 102056 102092 102104 102116 25 102493 102506 102519 102571 102636 102727 102805 102844 102831 26 103390 103338 103286 103260 103312 103416 103520 103585 103546 27 104365 104274 104144 104053 104066 104183 104326 104417 104365 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.4b IMAGE DISPLAY LABEL PDS_VERSION_ID = PDS3 LABEL_REVISION_NOTE = "Fri Dec 20 02:54:12 2013 , C. See" RECORD_TYPE = UNDEFINED ^PNG_DOCUMENT = "PNGIMG_1051_11751_S_0000_M.PNG" DATA_SET_ID = "HP-SSA-DISR-2/3-EDR/RDR-V1.1" PRODUCT_ID = "PNGIMG_1051_MTIME_03_15_51_2490_DISR" SOURCE_PRODUCT_ID = "IMAGE_1051_MTIME_03_15_51_2490_DISR" SEQUENCE_NUMBER = 1051 IMAGE_ID = SLI PRODUCT_CREATION_TIME = 2013-12-20T02:54:12 /*UTC*/ MISSION_NAME = "CASSINI-HUYGENS" INSTRUMENT_HOST_NAME = "HUYGENS PROBE" INSTRUMENT_HOST_ID = HP TARGET_NAME = TITAN MISSION_PHASE_NAME = DESCENT INSTRUMENT_ID = DISR INSTRUMENT_NAME = "DESCENT IMAGER SPECTRAL RADIOMETER" INSTRUMENT_TYPE = {"IMAGER","RADIOMETER","SPECTROMETER"} PRODUCER_ID = DISR PRODUCER_INSTITUTION_NAME = "UNIVERSITY OF ARIZONA" PRODUCER_FULL_NAME = "CHARLES (CHUCK) SEE" PRODUCT_TYPE = EDR START_TIME = 2005-01-14T12:26:12.249 /*UTC*/ STOP_TIME = 2005-01-14T12:26:12.254 /*UTC*/ SPACECRAFT_CLOCK_START_COUNT = 11751.249 /* DDB time in seconds.fff */ SPACECRAFT_CLOCK_STOP_COUNT = 11751.254 /* DDB time in seconds.fff */ FILE_NAME = "PNGIMG_1051_11751_S_0000_M.PNG" EXPOSURE_DURATION = 5.00000 EXPOSURE_TYPE = AUTO SPACECRAFT_ALTITUDE_START = 0.000 SPACECRAFT_ALTITUDE_END = 0.000 AZIMUTH_START = 295.35 /* CCW From Sun, Note 3 */ AZIMUTH_END = 295.35 AZIMUTH_NORTH_START = 180.00 /* CW From North, Note 4 */ AZIMUTH_NORTH_END = 180.00 HUYGENS:EW_TILT_ANGLE_START = 0.00 /* + for East tip, Note 6 */ HUYGENS:EW_TILT_ANGLE_END = 0.00 INSTRUMENT_TEMPERATURE = (181.13, "UNK", 199.60, 199.87, 181.10, 175.33, 187.67, 184.35, 245.44, 217.73, 285.15) /* KELVIN */ INSTRUMENT_TEMPERATURE_POINT = ("CCD_T1","REF_T2","IRB_T3", "IRE_T4","CCDLUG_T5","STRAP_T6", "OPTICS_T7","VIOLET_T8","SH_AUX_T9", "SH_BOX_T10","EA_BOX_T11") LAMP_STATE = 0001 NULL_PIXEL_2 = 242.000 NULL_PIXEL_3 = 238.000 NATIVE_START_TIME = 11751.2490 NATIVE_STOP_TIME = 11751.2540 DESCRIPTION = " This is data from the DISR imagers. Three imagers take simultaneous exposures. The Side Looking Imager (SLI) views from 96 down to 45 deg from Nadir. The Medium Resolution Imager (MRI) views from 45 to 16 deg from Nadir. And, the High Resolution Imager (HRI) views from 21 to 6 deg Nadir. The composite image covers ~25 deg of azimuth. The BROWSE (PNG) images are re-binned to twice their original size (2X & 2Y). They also are photometrically limited to 5 sigma below their mean value (if greater than 0), and to 4 sigma above their mean value (if less than the maximum), to remove dead or hot pixels. A few of the images taken on Titans surface have saturated or missing pixels. Saturated pixels have a value of 519,168 DN. Missing pixels have a value of zero, and are usually in contiguous 16 x 16 pixel blocks (missing packets). Pixel values can be found in the corresponding image table under: DATA/IMAGE/TABLE_FORMAT. The MRIs exhibit a changed responsivity on the top rows of the image, due to an error in the on-board flat field (see Users Guide, sect. 5.8). Notes: 1) The altitudes are from the DTWG release in June of 2011. 2) The probe azimuth & tilt are updated to the March 2013 Karkoschka analysis. 3) AZIMUTH... is degrees counter clockwise from the Sun, viewed from Nadir. 4) AZIMUTH_NORTH... is degrees clockwise from North, as viewed from Nadir. 5) These data are from ESOC stream 524(b). 6) Positive tilt is parachute East of probe (spin axis tipped East) 7) Temperatures are reported at the mid point (in time) of the observation. A list of the header entries from the source XDR format file are shown below for reference. The official label data (above) takes precedence over any conflicting information presented below (i.e. azimuths, temps., etc): filename_pre: C:\df3\15Jan05\Log\524B\DB2\Image15\ original_filename: V_01051I_MMX_03%15%51_2490_Img dimensions: 2 num_cols: 128 num_rows: 256 data_type: 3, 32 bit integer date_replayed: Wed Feb 09 11:08:33 2005 engineer: Chuck See set_name: Image ccd_t1: 181.10 detector: CCD CCD_id_no: 93.00 ms exp_time: 5.00 ms coord_x col1: 361 gse_ver: Windows_GSE test_log: stream_524b\DB2\Image15 ESOC_File: C:\df3\15Jan05\ESOC_Files\o524sd__.1h_ set_id: 11 seq_num: 1051 m_time: 11751.25 cycle_num: 161 dataset type: 22 (SLI) predicted altitude: 0.000 km target azimuth: 2.000 predicted azimuth: 0.820 lamp states: 0001 ccd_stat: 0 dcs_stat: 1 ccd_flag: 1110 proc_flag: 100111 cols_sent: 128 null_col2: 242 null_col3: 238 ccd_tgt_pct: 60 ccd_prctile: 97 thermistor_I: 0.0 ccdlug_t5: 181.2 strap_t: 175.4 optics_t: 187.7 violet_t: 184.5 SH_aux_t: 245.5 SH_box_t: 217.8 EA_box_t: 285.2 Aux_volt: 11.9 cpu_volt: 4.9 adc_offset: 0.0 disp_q_size: 7 alarm_q_size: 12 tlm_q_size: 0 sci_pro_q: 4 stack_size: 1280 comp_ratio: 14 disr_model: DISR3 sqrt_min (12 bit): 50 sqrt_max (12 bit): 358 Pixel min, max & mean (19 bit, 0 to 519,168): 4044, 81014, 24155.84 " OBJECT = PNG_DOCUMENT DOCUMENT_NAME = "DISR Huygens Descent PNG Image" PUBLICATION_DATE = 2013-12-20 DOCUMENT_TOPIC_TYPE = "MISSION RESULTS" FILES = 1 DOCUMENT_FORMAT = PNG ENCODING_TYPE = "PNG1.0" INTERCHANGE_FORMAT = BINARY SAMPLE_TYPE = UNSIGNED_INTEGER SAMPLE_BITS = 16 DESCRIPTION = "Portable Network Graphics (PNG) representation of DISR camera image taken during the Titan Descent. Scaled from min=0 to max=65535. Displayed as DISR sees the world. SLI - 128 by 256 pixels. PNG 1.0, 16 bit Unsigned, No Compression" END_OBJECT = PNG_DOCUMENT END SAMPLE IMAGE DATA ... 5.5 IR LABEL PDS_VERSION_ID = PDS3 LABEL_REVISION_NOTE = "Mon Dec 30 21:18:29 2013 , C. See" RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 173 FILE_RECORDS = 251 ^DATA_HEADER = "IR_0001_00143_S_141_KM.TAB" ^DATA_TABLE = ("IR_0001_00143_S_141_KM.TAB",2) ^REGIONS_HEADER = ("IR_0001_00143_S_141_KM.TAB",154) ^REGIONS_TABLE = ("IR_0001_00143_S_141_KM.TAB",156) ^READING_HEADER = ("IR_0001_00143_S_141_KM.TAB",165) ^READING_TABLE = ("IR_0001_00143_S_141_KM.TAB",168) ^BINS_HEADER = ("IR_0001_00143_S_141_KM.TAB",225) ^BINS_TABLE = ("IR_0001_00143_S_141_KM.TAB",228) DATA_SET_ID = "HP-SSA-DISR-2/3-EDR/RDR-V1.1" PRODUCT_ID = "IR_0001_MTIME_00_02_23_1725_DISR" SEQUENCE_NUMBER = 0001 MEASUREMENT_TYPE = IR_COMB PRODUCT_CREATION_TIME = 2013-12-30T21:18:29 /*UTC*/ MISSION_NAME = "CASSINI-HUYGENS" INSTRUMENT_HOST_NAME = "HUYGENS PROBE" INSTRUMENT_HOST_ID = HP TARGET_NAME = TITAN MISSION_PHASE_NAME = DESCENT INSTRUMENT_ID = DISR INSTRUMENT_NAME = "DESCENT IMAGER SPECTRAL RADIOMETER" INSTRUMENT_TYPE = {"IMAGER","RADIOMETER","SPECTROMETER"} PRODUCER_ID = DISR PRODUCER_INSTITUTION_NAME = "UNIVERSITY OF ARIZONA" PRODUCER_FULL_NAME = "CHARLES (CHUCK) SEE" PRODUCT_TYPE = EDR START_TIME = 2005-01-14T09:12:44.173 /*UTC*/ STOP_TIME = 2005-01-14T09:13:54.529 /*UTC*/ SPACECRAFT_CLOCK_START_COUNT = 143.173 /* DDB time in seconds.fff */ SPACECRAFT_CLOCK_STOP_COUNT = 213.529 /* DDB time in seconds.fff */ FILE_NAME = "IR_0001_00143_S_141_KM.TAB" INTEGRATION_DURATION = 70.3567 /* Total Collection Time */ EXPOSURE_DURATION = "N/A" EXPOSURE_TYPE = AUTO SPACECRAFT_ALTITUDE_START = 142.794 SPACECRAFT_ALTITUDE_END = 139.241 AZIMUTH_START = 145.38 /* CCW From Sun, Note 3 */ AZIMUTH_END = 257.87 AZIMUTH_NORTH_START = 327.38 /* CW From North, Note 4 */ AZIMUTH_NORTH_END = 214.93 HUYGENS:EW_TILT_ANGLE_START = 9.82 /* + for East tip, Note 6 */ HUYGENS:EW_TILT_ANGLE_END = 1.45 PREDICTED_SPIN_RATE = 6.69 /* Always Positive, Note 9 */ SPIN_RATE_START = 5.05 /* CCW Positive, Note 8 */ SPIN_RATE_END = 3.93 ROTATIONS = 5.26 /* CCW Positive, Note 8 */ INSTRUMENT_TEMPERATURE = (258.95, "UNK", 270.27, 270.81, 266.78, 258.68, 264.12, 269.48, 275.57, 274.42, 286.84) /* KELVIN */ INSTRUMENT_TEMPERATURE_POINT = ("CCD_T1","REF_T2","IRB_T3", "IRE_T4","CCDLUG_T5","STRAP_T6", "OPTICS_T7","VIOLET_T8","SH_AUX_T9", "SH_BOX_T10","EA_BOX_T11") LAMP_STATE = 0000 NATIVE_START_TIME = 143.1725 NATIVE_STOP_TIME = 213.5292 DETECTOR_ID = "IR_COMB" COLUMNS = 24 ROWS = 150 DESCRIPTION = " This is data from the DISR IR spectrometers. There are two, one looking upward (~2 Pi steradians), and one looking downward (from 15.5 to 24.5 deg Nadir, & ~3 deg in azimuth). Both have 132 spectral pixels, from about 870 to 1700 nm. The data are binned in regions symmetric about the sun vector. See DISR Users Guide, section 5.11. The IR data is presented in 4 tables. The DATA_TABLE presents the photometric readings for each pixel. The REGIONS_TABLE provides information on the bin orientation. The READING_TABLE lists the measurements in chronological order. And, the BINS_TABLE presents the total exposure time for each bin. The photometric values are inverted. 60,000 DN is dark, and below 3500 DN are typically saturated pixels. See DISR Users Guide, section 5.11 for details. Notes: 1) The altitudes are from the DTWG release in June of 2011. 2) The probe azimuth & tilt are updated to the March 2013 Karkoschka analysis. 3) AZIMUTH... is degrees counter clockwise from the Sun, viewed from Nadir. 4) AZIMUTH_NORTH... is degrees clockwise from North, as viewed from Nadir. 5) These data are from ESOC stream 524(b). 6) Positive tilt is parachute East of probe (spin axis tipped East) 7) Temperatures are reported at the mid point (in time) of the observation. 8) ROTATIONS are approximate & are based on the local average spin rate. 9) PREDICTED_SPIN_RATE is an inaccurate real-time estimate from DDB & Sun Sensor. It is the value the instrument used to plan the observation. A list of the header entries from the source XDR format file are shown below for reference. The official label data (above) takes precedence over any conflicting information presented below (i.e. azimuths, temps., etc): filename_pre: C:\df3\15Jan05\Log\524B\DB\Ir\ original_filename: V_00001R_MMX_00%02%23_1725_Ir replay_time: Wed Feb 09 11:14:08 2005 dimensions: 2 num_cols: 150 num_rows: 24 data_type: 3 (32 bit integer) date_replayed: Wed Feb 09 11:08:33 2005 engineer: Chuck See observation_site: ESOC set_name: Ir ccd_t1: 259.40 detector: IR Sensor_id_no: 93.00 gse_ver: Windows_GSE test_log: stream_524b\DB2\Image15 ESOC_File: C:\df3\15Jan05\ESOC_Files\o524sd__.1h_ set_id: 16 seq_num: 1 m_time: 143.17 cycle_num: 1 dataset type: 10 (IR_COMB) predicted altitude: 141.000 km predicted azimuth: 0.000 deg CCW Sun lamp states: 0000 ir_hardware_status: 0 ir_flags: 11 optimum & compression ir_chip_temp_start: 269.980 deg K ir_chip_temp_end: 270.592 deg K precharge_voltage: 12592.000 mv IR_collection_time: 70.357 seconds num_bins: 56.000 bins (typ 1, or 8 per rotation) num_regions: 8.000 regions ulis_dc_offset: 9522.000 mv dlis_dc_offset: 9105.000 mv target_%_ulis: 50.000 % target_%_dlis: 50.000 % %_point_ulis: 7.000 % %_point_dlis: 7.000 % thermistor_I: 2.046 mA ccdlug_t5: 261.6 strap_t: 258.9 optics_t: 264.2 violet_t: 263.9 SH_aux_t: 275.7 SH_box_t: 274.2 EA_box_t: 287.1 Aux_volt: 11.9 cpu_volt: 5.0 adc_offset: 0.0 disp_q_size: 6 alarm_q_size: 10 tlm_q_size: 0 sci_pro_q: 5 stack_size: 1471 num_bins: 24 disr_model: DISR3 Pixel min, max & mean (16 bit, 0 to 65,535): 3272, 53227, 49290.17 " OBJECT = DATA_HEADER HEADER_TYPE = TEXT BYTES = 173 RECORDS = 2 INTERCHANGE_FORMAT = ASCII DESCRIPTION = "The first 2 lines of the file contain the table title and column headers." END_OBJECT = DATA_HEADER OBJECT = DATA_TABLE INTERCHANGE_FORMAT = ASCII COLUMNS = 25 ROWS = 150 ROW_BYTES = 173 DESCRIPTION = "AN ARRAY OF IR MEASUREMENTS 150 BY 24 FROM THE IR SPECTROMETER." OBJECT = COLUMN NAME = "ROW" COLUMN_NUMBER = 1 UNIT = "N/A" DATA_TYPE = INTEGER START_BYTE = 1 BYTES = 4 FORMAT = "I4" DESCRIPTION = "THE ROW #, EACH CORRESPONDS TO AN IR PIXEL. SHORT WL AT TOP (1), REDDER AT BOTTOM (150)" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DLIS SHUTTER OPEN COL1" COLUMN_NUMBER = 2 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 5 BYTES = 7 FORMAT = "I7" DESCRIPTION = "IR_COMB COUNTS WHILE SHUTTER IS OPEN" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DLIS SHUTTER OPEN COL2" COLUMN_NUMBER = 3 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 12 BYTES = 7 FORMAT = "I7" DESCRIPTION = "IR_COMB COUNTS WHILE SHUTTER IS OPEN" END_OBJECT = COLUMN . . . . . . OBJECT = COLUMN NAME = "ULIS SHUTTER CLOSED COL4" COLUMN_NUMBER = 25 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 166 BYTES = 7 FORMAT = "I7" DESCRIPTION = "IR_COMB COUNTS WHILE SHUTTER IS CLOSED" END_OBJECT = COLUMN END_OBJECT = DATA_TABLE OBJECT = REGIONS_HEADER HEADER_TYPE = TEXT BYTES = 38 RECORDS = 2 INTERCHANGE_FORMAT = ASCII DESCRIPTION = "The first 2 lines contain the table title and column headers." END_OBJECT = REGIONS_HEADER OBJECT = REGIONS_TABLE INTERCHANGE_FORMAT = ASCII ROWS = 8 COLUMNS = 5 ROW_BYTES = 37 DESCRIPTION = "Definition of the start & end azimuths for each region and their associated bin designation." OBJECT = COLUMN NAME = "REGION NUMBER" COLUMN_NUMBER = 1 UNIT = "N/A" DATA_TYPE = INTEGER START_BYTE = 1 BYTES = 4 FORMAT = "I4" DESCRIPTION = "NUMBER OF THE REGION" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "STARTING AZIMUTH" COLUMN_NUMBER = 2 UNIT = "CENTI-DEGREES" DATA_TYPE = INTEGER START_BYTE = 5 BYTES = 8 FORMAT = "I8" DESCRIPTION = "OFFSET FROM START AZIMUTH TO THE BEGINNING" OF THE BIN IN DEG (*100) CCW " END_OBJECT = COLUMN OBJECT = COLUMN NAME = "ENDING AZIMUTH" COLUMN_NUMBER = 3 UNIT = "CENTI-DEGREES" DATA_TYPE = INTEGER START_BYTE = 13 BYTES = 8 FORMAT = "I8" DESCRIPTION = "OFFSET FROM START AZIMUTH TO THE END" OF THE BIN IN DEG (*100) CCW " END_OBJECT = COLUMN OBJECT = COLUMN NAME = "UP BIN INDEX" COLUMN_NUMBER = 4 UNIT = "N/A" DATA_TYPE = INTEGER START_BYTE = 21 BYTES = 8 FORMAT = "I8" DESCRIPTION = "TELLS PART OF ARRAY (BIN) IN WHICH THE ULIS SUM IS ACCUMULATED" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DOWN BIN INDEX" COLUMN_NUMBER = 5 UNIT = "N/A" DATA_TYPE = INTEGER START_BYTE = 29 BYTES = 8 FORMAT = "I8" DESCRIPTION = "TELLS PART OF ARRAY (BIN) IN WHICH THE DLIS SUM IS ACCUMULATED." END_OBJECT = COLUMN END_OBJECT = REGIONS_TABLE OBJECT = READING_HEADER HEADER_TYPE = TEXT BYTES = 46 RECORDS = 3 INTERCHANGE_FORMAT = ASCII DESCRIPTION = "The first 3 lines contain the table title and column headers." END_OBJECT = READING_HEADER OBJECT = READING_TABLE INTERCHANGE_FORMAT = ASCII ROWS = 56 COLUMNS = 6 ROW_BYTES = 45 DESCRIPTION = "A CHRONOLOGICAL LISTING OF THE DATA COLLECTION, SHOWING THE COLLECTION TIME, SHUTTER TIME AND SAMPLE TIME (IN 8.064 ms STEPS) FOR EACH REGION." OBJECT = COLUMN NAME = "ROTATION NUMBER" COLUMN_NUMBER = 1 UNIT = "N/A" DATA_TYPE = INTEGER START_BYTE = 1 BYTES = 3 FORMAT = "I3" DESCRIPTION = "ROTATION NUMBER" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "REGION" COLUMN_NUMBER = 2 UNIT = "N/A" DATA_TYPE = INTEGER START_BYTE = 4 BYTES = 5 FORMAT = "I5" DESCRIPTION = "REGION OF ROTATION USED" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "MISSION TIME START" COLUMN_NUMBER = 3 UNIT = "SECONDS*10E-4" DATA_TYPE = INTEGER START_BYTE = 9 BYTES = 12 FORMAT = "I12" DESCRIPTION = "MISSION TIME AT START OF ROTATION IN SEC X 1E4" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "IR DURATION" COLUMN_NUMBER = 4 UNIT = "8.064 MILLISECOND STEPS" DATA_TYPE = INTEGER START_BYTE = 21 BYTES = 8 FORMAT = "I8" DESCRIPTION = "COLLECTION TIME FOR THIS ROTATION REGION IN UNITS OF 8.064 MILLISECOND STEPS" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "IR SHUTTER TIME" COLUMN_NUMBER = 5 UNIT = 8.064 MILLISECOND PERIODS DATA_TYPE = INTEGER START_BYTE = 29 BYTES = 8 FORMAT = "I8" DESCRIPTION = "TIME THE SHUTTER IS OPEN PER CYCLE IN UNITS OF 8.064 MILLISECOND STEPS (N*SAMPLE TIME)" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "IR SAMPLE TIME" COLUMN_NUMBER = 6 UNIT = 8.064 MILLISECOND STEPS DATA_TYPE = INTEGER START_BYTE = 37 BYTES = 8 FORMAT = "I8" DESCRIPTION = "TIME BETWEEN READS IN UNITS OF 8.064 MILLISECOND INCREMENTS (I.E. EXPOSURE TIME)" END_OBJECT = COLUMN END_OBJECT = READING_TABLE OBJECT = BINS_HEADER HEADER_TYPE = TEXT BYTES = 56 RECORDS = 3 INTERCHANGE_FORMAT = ASCII DESCRIPTION = "The first 3 lines contain the table title and column headers." END_OBJECT = BINS_HEADER OBJECT = BINS_TABLE INTERCHANGE_FORMAT = ASCII ROWS = 24 COLUMNS = 6 ROW_BYTES = 53 DESCRIPTION = "Information on the direction (up vs. down), the shutter state (open vs. closed), the total accumulated shutter time, number of samples, and corresponding Data Table column number for the data in each bin. " OBJECT = COLUMN NAME = "BIN NUMBER" COLUMN_NUMBER = 1 UNIT = "N/A" DATA_TYPE = INTEGER START_BYTE = 1 BYTES = 4 FORMAT = "I4" DESCRIPTION = "THE NUMBER OF THE BIN " END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DLIS OR ULIS" COLUMN_NUMBER = 2 UNIT = "N/A" DATA_TYPE = INTEGER START_BYTE = 5 BYTES = 8 FORMAT = "I8" DESCRIPTION = "IDENTIFIES THE DOWN (0) OR UP (1) LOOKING INSTRUMENT" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SHUTTER STATE" COLUMN_NUMBER = 3 UNIT = "N/A" DATA_TYPE = INTEGER START_BYTE = 13 BYTES = 8 FORMAT = "I8" DESCRIPTION = "TELLS IF THE SHUTTER IS OPEN (0) OR CLOSED (1) FOR THE DATA IN THIS BIN." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SHUTTER INTEGRATION TIME" COLUMN_NUMBER = 4 UNIT = "SECONDS*10**-4" DATA_TYPE = INTEGER START_BYTE = 21 BYTES = 14 FORMAT = "I14" DESCRIPTION = "INTEGRATION OF SHUTTER ACTUATION TIME (OPEN OR CLOSED) FOR THIS BIN IN SECONDS*E-4." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "NUMBER SAMPLES TAKEN" COLUMN_NUMBER = 5 UNIT = "SECONDS*10**-4" DATA_TYPE = INTEGER START_BYTE = 35 BYTES = 10 FORMAT = "I10" DESCRIPTION = "TOTAL NUMBER OF SAMPLES TAKEN WITH THE SHUTTER OPEN (OR CLOSED) FOR THIS BIN." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DATA ROW FOR BIN" COLUMN_NUMBER = 6 UNIT = "SECONDS*10**-4" DATA_TYPE = INTEGER START_BYTE = 45 BYTES = 8 FORMAT = "I8" DESCRIPTION = "ROW OF THE PIXEL ARRAY (DATA TABLE) THAT CORRESPONDS TO THIS BIN" END_OBJECT = COLUMN END_OBJECT = BINS_TABLE END SAMPLE IR DATA PRINTOUT... DATA_TABLE... PIX D O 1 D O 2 D O 3 D O 4 D O 5 D O 6 D O 7 D O 8 D C 1 D C 2 D C 3 ... 1 49175 49172 49171 49178 49177 49175 49174 49176 49170 49168 49166 ... 2 49073 49073 49074 49081 49078 49077 49078 49078 49069 49070 49071 ... 3 48344 48341 48337 48348 48349 48347 48345 48345 48345 48343 48339 ... 4 48379 48379 48379 48390 48386 48383 48384 48385 48381 48379 48381 ... 5 48206 48205 48203 48216 48214 48212 48211 48208 48208 48207 48205 ... 6 44267 44266 44259 44287 44271 44271 44255 44258 44280 44278 44271 ... 7 48374 48370 48370 48381 48379 48379 48376 48376 48375 48372 48371 ... 8 48276 48276 48277 48289 48285 48282 48281 48282 48321 48321 48322 ... 9 38574 38627 38587 38678 38626 38567 38590 38643 38642 38689 38665 ... 10 47682 47680 47683 47694 47691 47691 47689 47689 47735 47734 47735 ... 11 48479 48475 48474 48484 48483 48480 48478 48479 48527 48524 48523 ... 12 46828 46824 46819 46835 46833 46828 46833 46829 46878 46875 46870 ... 13 48335 48334 48337 48344 48343 48340 48339 48342 48384 48381 48384 ... 14 48224 48225 48225 48235 48232 48229 48229 48229 48269 48269 48269 ... to row: 150 REGIONS_TABLE... REGION AZ_S AZ_E UP-BIN DWN-BIN 1 0 4500 11 1 2 4500 7000 12 2 3 9000 13500 13 3 4 13500 18000 14 4 5 18000 22500 14 5 6 22500 27000 13 6 7 29000 31500 12 7 8 31500 36000 11 8 READING_TABLE... ROT REGION M_TIME_S COLL_T SHUT_T SAMP_T NO NO SEC*E4 *8.064 *8.064 *8.064 1 4 1432437 122 10 1 1 5 1443484 122 10 1 1 6 1454693 122 10 1 1 7 1470337 74 10 1 . . . . . . . . . . . . . . . . . . 7 1 2093202 146 10 1 7 2 2107877 86 12 1 7 3 2121425 170 10 1 BINS_TABLE... BIN UP-DOWN OPEN-CLOSE OPEN_TIME NO_SAMPS COL_NO NO 0=D 1=U 0=O 1=C SEC*E-4 1 0 0 33062 410 0 2 0 0 18869 234 1 3 0 0 34675 430 2 4 0 0 33062 410 3 5 0 0 33062 410 4 6 0 0 33062 410 5 7 0 0 18385 228 6 8 0 0 33062 410 7 1 0 1 33062 410 8 2 0 1 18869 234 9 3 0 1 34675 430 10 4 0 1 33062 410 11 5 0 1 33062 410 12 6 0 1 33062 410 13 7 0 1 18385 228 14 8 0 1 33062 410 15 11 1 0 66124 820 16 12 1 0 37255 462 17 13 1 0 67737 840 18 14 1 0 66124 820 19 11 1 1 66124 820 20 12 1 1 37255 462 21 13 1 1 67737 840 22 14 1 1 66124 820 23 5.6 LAMP LABEL PDS_VERSION_ID = PDS3 LABEL_REVISION_NOTE = "Wed Jan 01 02:47:21 2014 , C. See" RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 70 FILE_RECORDS = 44 ^TEXT = "LAMP_0001_00702_S_118_KM.TXT" DATA_SET_ID = "HP-SSA-DISR-2/3-EDR/RDR-V1.1" PRODUCT_ID = "LAMP_0001_MTIME_00_11_41_7062_DISR" SEQUENCE_NUMBER = 0001 PRODUCT_CREATION_TIME = 2014-01-01T02:47:21 /*UTC*/ MISSION_NAME = "CASSINI-HUYGENS" INSTRUMENT_HOST_NAME = "HUYGENS PROBE" INSTRUMENT_HOST_ID = HP TARGET_NAME = TITAN MISSION_PHASE_NAME = DESCENT INSTRUMENT_ID = DISR INSTRUMENT_NAME = "DESCENT IMAGER SPECTRAL RADIOMETER" INSTRUMENT_TYPE = {"IMAGER","RADIOMETER","SPECTROMETER"} PRODUCER_ID = DISR PRODUCER_INSTITUTION_NAME = "UNIVERSITY OF ARIZONA" PRODUCER_FULL_NAME = "CHARLES (CHUCK) SEE" PRODUCT_TYPE = EDR START_TIME = 2005-01-14T09:22:02.706 /*UTC*/ STOP_TIME = 2005-01-14T09:22:02.706 /*UTC*/ SPACECRAFT_CLOCK_START_COUNT = 701.706 /* DDB time in seconds.fff */ SPACECRAFT_CLOCK_STOP_COUNT = 701.706 /* DDB time in seconds.fff */ FILE_NAME = "LAMP_0001_00702_S_118_KM.TXT" PREDICTED_ALTITUDE = 120.727 /* Real-Time from DDB */ SPACECRAFT_ALTITUDE_START = 118.329 SPACECRAFT_ALTITUDE_END = 118.329 AZIMUTH_START = 204.54 /* CCW From Sun, Note 3 */ AZIMUTH_END = 204.54 AZIMUTH_NORTH_START = 268.58 /* CW From North, Note 4 */ AZIMUTH_NORTH_END = 268.58 HUYGENS:EW_TILT_ANGLE_START = -7.60 /* + for East tip, Note 6 */ HUYGENS:EW_TILT_ANGLE_END = -7.60 SPIN_RATE_START = -1.27 /* CCW Positive, Note 7 */ SPIN_RATE_END = -1.27 /* CCW Positive, Note 7 */ INSTRUMENT_TEMPERATURE = (260.58, "UNK", 272.62, 272.64, 262.33, 259.12, 264.39, 261.70, 276.01, 272.43, 289.03) /* KELVIN */ INSTRUMENT_TEMPERATURE_POINT = ("CCD_T1","REF_T2","IRB_T3", "IRE_T4","CCDLUG_T5","STRAP_T6", "OPTICS_T7","VIOLET_T8","SH_AUX_T9", "SH_BOX_T10","EA_BOX_T11") NATIVE_START_TIME = 701.7062 NATIVE_STOP_TIME = 701.7062 DESCRIPTION = " The Lamp datasets contain information about the voltage and current being drawn from the DISR calibration and Surface Science lamps while they are on. These datasets are generated at the rate of about one every 5 seconds when the lamps are energized. Notes: 1) The altitudes are from the DTWG release in June of 2011. 2) The probe azimuth & tilt are updated to the March 2013 Karkoschka analysis. 3) AZIMUTH... is degrees counter clockwise from the Sun, viewed from Nadir. 4) AZIMUTH_NORTH... is degrees clockwise from North, as viewed from Nadir. 5) These data are from ESOC stream 524(b). 6) Positive tilt is parachute East of probe (spin axis tipped East) 7) Probe SPIN_RATE is the local average spin rate at the time of the dataset. A list of the header entries from the source XDR format file are shown below for reference. The official label data (above) takes precedence over any conflicting information presented below (i.e. azimuths, temps., etc): filename_pre: C:\df3\15Jan05\Log\524B\DB2\Lamp\ filename: V_00001L_MMX_00%11%41_7062_Lmp dimensions: 0 num_cols: 0 num_rows: 0 data_type: 0 (null) date_replayed: Wed Feb 09 11:08:33 2005 engineer: Chuck See set_name: Lamp ccd_t1: 260.50 detector: AUX CCD_id_no: 93 gse_ver: Windows_GSE test_log: C:\df3\15Jan05\ESOC_Files units: C:\df3\15Jan05\ESOC_Files\o524sd__.1h_ set_id: 07 seq_num: 0001 m_time: 701.71 seconds DDB altitude: 120.727 km lamp states: 1110 thermistor_current: 0.002046 amps ccdlug_t5: 262.3 deg. K strap_t: 259.1 deg. K optics_t: 264.4 deg. K violet_t: 261.7 deg. K SH_aux_t: 276.0 deg. K SH_box_t: 272.4 deg. K EA_box_t: 289.0 deg. K Aux_volt: 11.9 volts cpu_volt: 5.0 volts adc_offset: 0.0 volts disp_q_size: 8 alarm_q_size: 11 tlm_q_size: 0 sci_pro_q: 1 stack_size: 1159 cal1_volt: 4.9849 volts cal1_curr: 0.1145 amps cal2_volt: 4.8971 volts cal2_curr: 0.1099 amps cal3_volt: 4.9117 volts cal3_curr: 0.1167 amps ssl_volt: 0.0000 volts ssl_curr: 0.0000 amps disr_model: DISR3 " OBJECT = TEXT RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 70 FILE_RECORDS = 44 NOTE = "DISR LAMP DATASET" PUBLICATION_DATE = 2014-01-01 INTERCHANGE_FORMAT = ASCII END_OBJECT = TEXT END SAMPLE LAMP DATA PRINTOUT... Stream: 524B\DB2 Original_Filename: V_00001L_MMX_00%11%41_7062_Lmp Date_Taken: 2005-01-14T09:22:02.706 Set_Name: Lamp GSE_Version: Windows_GSE Sequence_No.: 0001 Mission_Time: 701.71 seconds after T0 Predicted_Altitude: 120.727 (Kilometers) Actual_Altitude*: 118.329 (Kilometers) Lamp_State: 1110 (C1,C2,C3,SSL) Cal_Lamp1_Voltage: 4.9849 volts Cal_Lamp1_Current: 0.1145 amps Cal_Lamp2_Voltage: 4.8971 volts Cal_Lamp2_Current: 0.1099 amps Cal_Lamp3_Voltage: 4.9117 volts Cal_Lamp3_Current: 0.1167 amps Surface_Science_Lamp_Vol 0.0000 volts Surface_Science_Lamp_Cur 0.0000 amps Thermistor_Current: 0.002046 (amps) CCD_Temp_t1: 260.50 degK CCD_Lug_Temp_t5: 262.30 degK Thermal_Strap_t6: 259.12 degK Optical_Bench_t7: 264.39 degK Violet_Detector_t8: 261.70 degK Sensor_Head_Aux_t9: 276.01 degK Sensor_Head_Box_t10 272.43 degK Electronics_Box_t11 289.03 degK Aux_Board_Voltage: 11.9311 volts CPU_Board_Voltage: 4.9789 volts ADC_Offset: 0.002440 volts Display_Queue_size: 8 Alarm_Queue_size: 11 Telemetry_Queue_size: 0 Sci_Processing_Q_size: 1 Stack_size: 1159 *=Post mission reconstructed information. 5.7 SOLAR LABEL PDS_VERSION_ID = PDS3 LABEL_REVISION_NOTE = "Sat Jan 11 01:47:50 2014 , C. See" RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 173 FILE_RECORDS = 52 ^HEADER = ("SOLAR_0001_00168_S_142_KM.TAB",1) ^TABLE = ("SOLAR_0001_00168_S_142_KM.TAB",3) DATA_SET_ID = "HP-SSA-DISR-2/3-EDR/RDR-V1.1" PRODUCT_ID = "SOLAR_0001_MTIME_00_02_47_9261_DISR" SEQUENCE_NUMBER = 0001 PRODUCT_CREATION_TIME = 2014-01-11T01:47:50 /*UTC*/ MISSION_NAME = "CASSINI-HUYGENS" INSTRUMENT_HOST_NAME = "HUYGENS PROBE" INSTRUMENT_HOST_ID = HP TARGET_NAME = TITAN MISSION_PHASE_NAME = DESCENT INSTRUMENT_ID = DISR INSTRUMENT_NAME = "DESCENT IMAGER SPECTRAL RADIOMETER" INSTRUMENT_TYPE = {"IMAGER","RADIOMETER","SPECTROMETER"} PRODUCER_ID = DISR PRODUCER_INSTITUTION_NAME = "UNIVERSITY OF ARIZONA" PRODUCER_FULL_NAME = "CHARLES (CHUCK) SEE" PRODUCT_TYPE = EDR START_TIME = 2005-01-14T09:13:08.926 /*UTC*/ STOP_TIME = 2005-01-14T09:13:08.986 /*UTC*/ SPACECRAFT_CLOCK_START_COUNT = 167.926 /* DDB time in seconds.fff */ SPACECRAFT_CLOCK_STOP_COUNT = 167.986 /* DDB time in seconds.fff */ FILE_NAME = "SOLAR_0001_00168_S_142_KM.TAB" EXPOSURE_DURATION = 60.0000 EXPOSURE_TYPE = AUTO PREDICTED_ALTITUDE = 150.693 /* Real-Time from DDB */ SPACECRAFT_ALTITUDE_START = 141.538 /* Reconstruction, Note 1 */ SPACECRAFT_ALTITUDE_END = 141.534 DESIRED_AZIMUTH = 2.50 /* CCW From Sun, Note 3 */ PREDICTED_AZIMUTH = 3.29 AZIMUTH_START = 137.98 /* CCW From Sun, Note 3 */ AZIMUTH_END = 139.65 AZIMUTH_NORTH_START = 334.79 /* CW From North, Note 4 */ AZIMUTH_NORTH_END = 333.11 SPIN_RATE = 4.63 /* CCW Positive, Note 8 */ ROTATIONS = 0.00 /* CCW +, Note 8 */ HUYGENS:EW_TILT_ANGLE_START = 6.61 /* + for East tip, Note 6 */ HUYGENS:EW_TILT_ANGLE_END = 6.60 INSTRUMENT_TEMPERATURE = (258.88, "UNK", 270.19, 270.75, 266.55, 258.64, 264.11, 269.51, 275.56, 274.46, 286.79) /* KELVIN */ INSTRUMENT_TEMPERATURE_POINT = ("CCD_T1","REF_T2","IRB_T3", "IRE_T4","CCDLUG_T5","STRAP_T6", "OPTICS_T7","VIOLET_T8","SH_AUX_T9", "SH_BOX_T10","EA_BOX_T11") LAMP_STATE = 0000 NULL_PIXEL_2 = 66.0000 NULL_PIXEL_3 = 55.0000 NATIVE_START_TIME = 167.9261 NATIVE_STOP_TIME = 167.9861 DESCRIPTION = " This is data from the DISR Solar Aureole Cameras. Four imagers take simultaneous exposures. The 4 cameras cover two wavelengths (500 & 935 nm) and two polarization states (horizontal & vertical). All the cameras cover an azimuth range of 6 degrees, and zenith range from 25 to 75 degrees. The intent was to take exposures near the sun, but due to pointing errors the strips on the sky were generally observed at random locations. The imagers each occupy 6 x 50 pixels on the CCD. The data is collected in two modes, 1) raw 12 bit photometric data (24 columns, 0 to 4096 DN), or 2) Four columns of data, row summed, by imager (0 to 24575 DN). Notes: 1) The altitudes are from the DTWG release in June of 2011. 2) The probe azimuth & tilt are updated to the March 2013 Karkoschka analysis. 3) AZIMUTH... is degrees counter clockwise from the Sun, viewed from Nadir. 4) AZIMUTH_NORTH... is degrees clockwise from North, as viewed from Nadir. 5) These data are from ESOC stream 524(b). 6) Positive tilt is parachute East of probe (spin axis tipped East) 7) Temperatures are reported at the mid point (in time) of the observation. 8) SPIN_RATE is approximate & based on the local average spin rate, CCW postiv. A list of the header entries from the source XDR format file are shown below for reference. The official label data (above) takes precedence over any conflicting information presented below (i.e. azimuths, temps., etc): filename_pre: C:\df3\15Jan05\Log\524B\DB2\Solar\ original_filename: V_00001A_MMX_00%02%47_9261_Slr date_of_data_replay: Wed Feb 09 11:13:54 2005 dimensions: 2 num_cols: 24 num_rows: 50 data_type: 2, 16 bit integer date_replayed: Wed Feb 09 11:08:33 2005 engineer: Chuck See set_name: Solar ccd_t1: 258.80 Kelvin detector: CCD CCD_id_no: 93 exp_time: 60.00 ms coord_x col2: 19 coord_y col2: 203 coord_x col3: 36 coord_y col3: 203 coord_x col4: 45 coord_y col4: 203 coord_x col1: 28 coord_y col1: 203 gse_ver: Windows_GSE test_log: C:\df3\14Jan05\Log\stream_524b\DB2\Solar ESOC_File: C:\df3\15Jan05\ESOC_Files\o524sd__.1h_ set_id: 13 (SA) seq_num: 1 m_time: 167.93 seconds after T0 cycle_num: 1 dataset type: 14 (SA) DDB altitude: 150.693 km target azimuth: 2.500 deg CCW Sun predicted azimuth: 3.290 deg CCW Sun lamp states: 0000 (C1 C2 C3 SSL) ccd_stat: 0 ccd_flag: 1110 proc_flag: 101001 bad_pixels: replaced summing: unsummed S/W Compression: compressed Square Root Proc: not square rooted H/W Compression: not compressed Exposure Control: automatic cols_sent: 24 null_col2: 66 DN null_col3: 55 DN ccd_tgt_pct: 50 ccd_prctile: 97 thermistor_I: 2.0460 mA ccdlug_t5: 261.6 Kelvin strap_t: 258.9 Kelvin optics_t: 264.2 Kelvin violet_t: 264.0 Kelvin SH_aux_t: 275.7 Kelvin SH_box_t: 274.2 Kelvin EA_box_t: 287.1 Kelvin Aux_volt: 11.9 Volts cpu_volt: 5.0 Volts adc_offset: 2.4 mV disp_q_size: 6 alarm_q_size: 10 tlm_q_size: 0 sci_pro_q: 5 stack_size: 1471 comp_ratio: 2.18 disr_model: DISR3 Pixel min, max & mean (Range: 0 to 4095 DN): 23, 541, 270.85 " OBJECT = HEADER HEADER_TYPE = TEXT BYTES = 173 RECORDS = 2 INTERCHANGE_FORMAT = ASCII DESCRIPTION = "The first 2 lines of the file contain info about the measurement and the table layout." END_OBJECT = HEADER OBJECT = TABLE INTERCHANGE_FORMAT = ASCII COLUMNS = 25 ROWS = 50 ROW_BYTES = 173 DESCRIPTION = "A 24 BY 50 ARRAY OF PIXEL VALUES FROM THE SOLAR AUREOLE CAMERA." OBJECT = COLUMN NAME = "ROW" COLUMN_NUMBER = 1 UNIT = "N/A" DATA_TYPE = INTEGER START_BYTE = 1 BYTES = 4 FORMAT = "I4" DESCRIPTION = "ROW - AND VERTICAL PIXEL NUMBER." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SA_COL_0-BLUE_HORIZONTAL_1" COLUMN_NUMBER = 2 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 5 BYTES = 7 FORMAT = "I7" DESCRIPTION = "500 NM HORIZONTAL POLARIZED COLUMN 1" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SA_COL_1-BLUE_HORIZONTAL_2" COLUMN_NUMBER = 3 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 12 BYTES = 7 FORMAT = "I7" DESCRIPTION = "500 NM HORIZONTAL POLARIZED COLUMN 2" END_OBJECT = COLUMN . . . . . . OBJECT = COLUMN NAME = "SA_COL_22-RED_HORIZONTAL_5" COLUMN_NUMBER = 24 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 159 BYTES = 7 FORMAT = "I7" DESCRIPTION = "935 NM HORIZONTAL POLARIZED COLUMN 5" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SA_COL_23-RED_HORIZONTAL_6" COLUMN_NUMBER = 25 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 166 BYTES = 7 FORMAT = "I7" DESCRIPTION = "935 NM HORIZONTAL POLARIZED COLUMN 6" END_OBJECT = COLUMN END_OBJECT = TABLE END SAMPLE SOLAR DATA PRINTOUT... Solar Aureole Summed Data from Dataset: 1 PIX B-H-1 B-H-2 B-H-3 B-H-4 B-H-5 B-H-6 B-V-1 B-V-2 B-V-3 B-V-4 B-V-5 ... 1 150 165 156 156 128 123 23 43 42 39 35 ... 2 381 415 426 419 410 400 108 185 182 170 142 ... 3 421 454 463 465 478 449 144 216 211 206 187 ... 4 430 472 463 474 478 449 151 217 208 203 196 ... 5 435 485 484 486 487 360 147 219 214 202 188 ... 6 453 492 482 494 483 260 146 212 205 202 188 ... 7 425 475 491 504 493 209 153 218 207 201 188 ... 8 427 475 485 494 479 349 125 200 200 193 183 ... 9 462 506 506 506 497 473 126 197 193 192 183 ... 10 479 499 520 506 508 497 157 197 197 180 185 ... 11 478 484 523 513 505 502 159 205 196 186 179 ... 12 482 521 517 527 523 512 157 199 196 188 176 ... 13 485 514 522 526 522 518 151 189 193 192 172 ... 14 496 519 533 523 524 508 148 197 188 187 173 ... 15 465 502 501 521 513 480 142 193 188 183 166 ... 16 467 516 513 518 520 396 143 191 186 184 170 ... 17 493 528 517 531 534 333 155 194 195 181 166 ... 18 494 515 534 541 525 250 165 203 192 184 176 ... etc, on to row 50 5.8 STRIP LABEL PDS_VERSION_ID = PDS3 LABEL_REVISION_NOTE = "Wed Jan 01 05:36:15 2014 , C. See" RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 50 FILE_RECORDS = 257 ^HEADER = "(STRIP_0001_00433_S_129_KM.TAB",1) ^TABLE = "(STRIP_0001_00433_S_129_KM.TAB",4) DATA_SET_ID = "HP-SSA-DISR-2/3-EDR/RDR-V1.1" PRODUCT_ID = "STRIP_0001_MTIME_00_07_13_2492_DISR" SEQUENCE_NUMBER = 0001 PRODUCT_CREATION_TIME = 2014-01-01T05:36:15 /*UTC*/ MISSION_NAME = "CASSINI-HUYGENS" INSTRUMENT_HOST_NAME = "HUYGENS PROBE" INSTRUMENT_HOST_ID = HP TARGET_NAME = TITAN MISSION_PHASE_NAME = DESCENT INSTRUMENT_ID = DISR INSTRUMENT_NAME = "DESCENT IMAGER SPECTRAL RADIOMETER" INSTRUMENT_TYPE = {"IMAGER","RADIOMETER","SPECTROMETER"} PRODUCER_ID = DISR PRODUCER_INSTITUTION_NAME = "UNIVERSITY OF ARIZONA" PRODUCER_FULL_NAME = "CHARLES (CHUCK) SEE" PRODUCT_TYPE = EDR START_TIME = 2005-01-14T09:17:34.249 /*UTC*/ STOP_TIME = 2005-01-14T09:17:34.252 /*UTC*/ SPACECRAFT_CLOCK_START_COUNT = 433.249 /* DDB time in seconds.fff */ SPACECRAFT_CLOCK_STOP_COUNT = 433.252 /* DDB time in seconds.fff */ FILE_NAME = "STRIP_0001_00433_S_129_KM.TAB" EXPOSURE_DURATION = 2.50000 EXPOSURE_TYPE = AUTO PREDICTED_ALTITUDE = 132.506 /* Real-Time from DDB */ SPACECRAFT_ALTITUDE_START = 129.102 /* Reconstruction, Note 1 */ SPACECRAFT_ALTITUDE_END = 129.102 DESIRED_AZIMUTH = 315.00 /* CCW From Sun, Note 3 */ PREDICTED_AZIMUTH = 314.25 AZIMUTH_START = 191.37 /* CCW From Sun, Note 3 */ AZIMUTH_END = 191.39 AZIMUTH_NORTH_START = 281.56 /* CW From North, Note 4 */ AZIMUTH_NORTH_END = 281.54 HUYGENS:EW_TILT_ANGLE_START = 0.86 /* + for East tip, Note 6 */ HUYGENS:EW_TILT_ANGLE_END = 0.86 INSTRUMENT_TEMPERATURE = (260.21, "UNK", 271.97, 272.24, 262.30, 259.52, 264.29, 263.10, 275.91, 273.43, 287.83) /* KELVIN */ INSTRUMENT_TEMPERATURE_POINT = ("CCD_T1","REF_T2","IRB_T3", "IRE_T4","CCDLUG_T5","STRAP_T6", "OPTICS_T7","VIOLET_T8","SH_AUX_T9", "SH_BOX_T10","EA_BOX_T11") LAMP_STATE = 0000 NULL_PIXEL_2 = 71.0000 NULL_PIXEL_3 = 69.0000 NATIVE_START_TIME = 433.2492 NATIVE_STOP_TIME = 433.2517 DESCRIPTION = " This is data from the DISR Side Looking Imager (SLI). This data consists of the sum of two strips, one near each edge of the imager. The left column is the sum of SLI columns 6 through 18, and the right dataset column is the sum of SLI columns 109 through 121. Both sums are 13 columns wide (~0.2 deg) and 254 rows vertically (~45 to 96 deg Nadir). Notes: 1) The altitudes are from the DTWG release in June of 2011. 2) The probe azimuth & tilt are updated to the March 2013 Karkoschka analysis. 3) AZIMUTH... is degrees counter clockwise from the Sun, viewed from Nadir. 4) AZIMUTH_NORTH... is degrees clockwise from North, as viewed from Nadir. 5) These data are from ESOC stream 524(b). 6) Positive tilt is parachute East of probe (spin axis tipped East) 7) Temperatures are reported at the mid point (in time) of the observation. A list of the header entries from the source XDR format file are shown below for reference. The official label data (above) takes precedence over any conflicting information presented below (i.e. azimuths, temps., etc): filename_pre: C:\df3\15Jan05\Log\524B\DB2\Strip\ original_filename: V_00001P_MMX_00%07%13_2492_Stp date_of_data_replay: Wed Feb 09 11:14:01 2005 dimensions: 2 num_cols: 2 num_rows: 254 data_type: 2, 16 bit integer date_replayed: Wed Feb 09 11:08:33 2005 engineer: Chuck See set_name: Strip ccd_t1: 260.20 detector: CCD CCD_id_no: 93 exp_time: 2.50 ms coord_x col1: 234 coord_y col1: 1 gse_ver: Windows_GSE test_log: stream_524b\DB2\Image15 ESOC_File: C:\df3\15Jan05\ESOC_Files\o524sd__.1h_ set_id: 12 (Strip) seq_num: 1 m_time: 433.25 cycle_num: 3 dataset type: 12 (STRIP) DDB altitude: 132.506 km target azimuth: 315.000 deg CCW Sun predicted azimuth: 314.250 deg CCW Sun lamp states: 0000 ccd_stat: 0 ccd_flag: 1110 proc_flag: 111001 cols_sent: 2 null_col2: 71 null_col3: 69 ccd_tgt_pct: 60 ccd_prctile: 97 strp_cnt_col: 232 first_col_strp: 240 thermistor_I: 0.0 ccdlug_t5: 262.3 strap_t: 259.5 optics_t: 264.3 violet_t: 263.1 SH_aux_t: 275.9 SH_box_t: 273.4 EA_box_t: 287.8 Aux_volt: 11.9 cpu_volt: 5.0 adc_offset: 0.0 disp_q_size: 9 alarm_q_size: 11 tlm_q_size: 0 sci_pro_q: 4 stack_size: 1282 comp_ratio: 1 disr_model: DISR3 Pixel min, max & mean (0 to 53,235): 0, 7764, 6320.26 " OBJECT = HEADER HEADER_TYPE = TEXT BYTES = 50 RECORDS = 3 INTERCHANGE_FORMAT = ASCII DESCRIPTION = "The first 3 lines of the file contain info about the measurement and the table layout." END_OBJECT = HEADER OBJECT = TABLE INTERCHANGE_FORMAT = ASCII COLUMNS = 3 ROWS = 254 ROW_BYTES = 21 DESCRIPTION = "SUM OF PIXEL VALUES FOR 13 COLUMNS NEAR EACH SIDE OF THE SLI" OBJECT = COLUMN NAME = "ROW" COLUMN_NUMBER = 1 UNIT = "N/A" DATA_TYPE = INTEGER START_BYTE = 1 BYTES = 4 FORMAT = "I4" DESCRIPTION = "ROW NUMBER - VERTICAL DIMENSION" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DN" COLUMN_NUMBER = 2 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 5 BYTES = 8 FORMAT = "I8" DESCRIPTION = "SUM OF PIXEL VALUES FOR 13 COLUMNS (COLUMN 6 THRU COLUMN 18) NEAR THE LEFT EDGE OF THE SLI" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DN" COLUMN_NUMBER = 3 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 13 BYTES = 8 FORMAT = "I8" DESCRIPTION = "SUM OF PIXEL VALUES FOR 13 COLUMNS (COLUMN 109 THRU COLUMN 121) NEAR THE RIGHT EDGE OF THE SLI" END_OBJECT = COLUMN END_OBJECT = TABLE END SAMPLE STRIP DATA PRINTOUT... SLI Strip Data from Dataset: 1 Sum of SLI Columns 6 thru 18 and 109 thru 121. ROW LEFT RIGHT 1 0 0 2 0 2444 3 2258 3096 4 3106 3189 5 3013 3233 6 3466 3268 7 3565 3314 8 3561 3321 9 3644 3411 etc to row 254 5.9 SUN LABEL PDS_VERSION_ID = PDS3 LABEL_REVISION_NOTE = "Sat Jan 11 20:47:10 2014 , C. See" RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 60 FILE_RECORDS = 7 ^HEADER = ("SUN_0010_01321_S_083_KM.TAB",1) ^TABLE = ("SUN_0010_01321_S_083_KM.TAB",3) DATA_SET_ID = "HP-SSA-DISR-2/3-EDR/RDR-V1.1" PRODUCT_ID = "SUN_0010_MTIME_00_22_00_7354_DISR" SEQUENCE_NUMBER = 0010 PRODUCT_CREATION_TIME = 2014-01-11T20:47:10 /*UTC*/ MISSION_NAME = "CASSINI-HUYGENS" INSTRUMENT_HOST_NAME = "HUYGENS PROBE" INSTRUMENT_HOST_ID = HP TARGET_NAME = TITAN MISSION_PHASE_NAME = DESCENT INSTRUMENT_ID = DISR INSTRUMENT_NAME = "DESCENT IMAGER SPECTRAL RADIOMETER" INSTRUMENT_TYPE = {"IMAGER","RADIOMETER","SPECTROMETER"} PRODUCER_ID = DISR PRODUCER_INSTITUTION_NAME = "UNIVERSITY OF ARIZONA" PRODUCER_FULL_NAME = "CHARLES (CHUCK) SEE" PRODUCT_TYPE = EDR START_TIME = 2005-01-14T09:32:21.735 /*UTC*/ STOP_TIME = 2005-01-14T09:33:44.131 /*UTC*/ SPACECRAFT_CLOCK_START_COUNT = 1320.735 /* DDB time in seconds.fff */ SPACECRAFT_CLOCK_STOP_COUNT = 1403.131 /* DDB time in seconds.fff */ FILE_NAME = "SUN_0010_01321_S_083_KM.TAB" PREDICTED_ALTITUDE = 84.103 /* Real-Time from DDB */ SPACECRAFT_ALTITUDE_START = 84.769 /* Reconstruction, Note 1 */ SPACECRAFT_ALTITUDE_END = 80.539 AZIMUTH_START = 6.98 /* CCW From Sun, Note 3 */ AZIMUTH_END = 345.52 AZIMUTH_NORTH_START = 106.58 /* CW From North, Note 4 */ AZIMUTH_NORTH_END = 128.08 SPIN_RATE = -8.56 /* CCW POSITIVE, Notes 2, 8 */ ROTATIONS = -11.75 /* CCW +, Note 8 */ HUYGENS:EW_TILT_ANGLE_START = -6.50 /* + for East tip, Note 6 */ HUYGENS:EW_TILT_ANGLE_END = -5.30 INSTRUMENT_TEMPERATURE = (258.44, "UNK", 271.35, 270.94, 258.85, 253.87, 263.30, 255.97, 275.02, 268.52, 291.86) /* KELVIN */ INSTRUMENT_TEMPERATURE_POINT = ("CCD_T1","REF_T2","IRB_T3", "IRE_T4","CCDLUG_T5","STRAP_T6", "OPTICS_T7","VIOLET_T8","SH_AUX_T9", "SH_BOX_T10","EA_BOX_T11") NATIVE_START_TIME = 1320.7354 NATIVE_STOP_TIME = 1403.1315 DESCRIPTION = " This is data from the DISR Sun Sensor. The Sun Sensor is a narrow band IR (936 nm) detector behind a double V shaped slit which produces 3 pulses for each encounter with the sun. If the set is deemed valid, the mission time for each pulse, and the amplitude of the signal are recorded. Variations in the period plus the pulse spacing allow the user to calculate the spin rate and tip in the direction of the sun. However, consecutive pulse readings are not necessarily consecutive probe rotations. Many sun crossings are missing. The Sun Sensors FOV covers 25 to 75 degs Zenith angle, but the on-board filtering designed to eliminate glints and errant pulses kept the sensor from recording each sun crossing due to excessive swinging of the probe. Notes: 1) The altitudes are from the DTWG release in June of 2011. 2) The probe azimuth & tilt are updated to the March 2013 Karkoschka analysis. 3) AZIMUTH... is degrees counter clockwise from the Sun, viewed from Nadir. 4) AZIMUTH_NORTH... is degrees clockwise from North, as viewed from Nadir. 5) These data are from ESOC stream 524(b). 6) Positive tilt is parachute East of probe (spin axis tipped East) 7) Temperatures are reported at the mid point (in time) of the observation. 8) ROTATIONS are approximate & are based on the local average spin rate. A list of the header entries from the source XDR format file are shown below for reference. The official label data (above) takes precedence over any conflicting information presented below (i.e. azimuths, temps., etc): filename_pre: C:\df3\15Jan05\Log\524B\DB2\Sun\ original_filename: V_00010S_MMX_00%22%00_7354_Sun date_of_data_replay: Wed Feb 09 11:09:06 2005 dimensions: 2 num_cols: 4 num_rows: 5 data_type: 3, 32 bit integer date_replayed: Wed Feb 09 11:08:33 2005 engineer: Chuck See set_name: Sun ccd_t1: 258.70 Kelvin detector_type: SUN CCD_id_no: 93 gse_ver: Windows_GSE test_log: C:\df3\14Jan05\Log\stream_524b\DB2\Sun ESOC_File: C:\df3\15Jan05\ESOC_Files\o524sd__.1h_ set_id: 3 (SUN_SENSOR) seq_num: 10 m_time: 1320.7354 seconds DDB altitude: 84.103 km thermistor_I: 2.0460 mA ccdlug_t5: 259.0 Kelvin strap_t: 254.6 Kelvin optics_t: 263.5 Kelvin violet_t: 256.6 Kelvin SH_aux_t: 275.0 Kelvin SH_box_t: 268.9 Kelvin EA_box_t: 291.7 Kelvin Aux_volt: 11.9 Volts cpu_volt: 5.0 Volts adc_offset: 3.677 mV disp_q_size: 9 alarm_q_size: 10 tlm_q_size: 0 sci_pro_q: 1 stack_size: 1181 num_triplets: 5 disr_model: DISR3 " OBJECT = HEADER HEADER_TYPE = TEXT BYTES = 60 RECORDS = 2 INTERCHANGE_FORMAT = ASCII DESCRIPTION = "The first 2 lines of the file contain info about the measurement and the column headers." END_OBJECT = HEADER OBJECT = TABLE INTERCHANGE_FORMAT = ASCII COLUMNS = 5 ROWS = 5 ROW_BYTES = 46 DESCRIPTION = "THE TIME OF THE THREE SUN SENSOR PULSES AND THE AMPLITUDE FROM THE SUN SENSOR." OBJECT = COLUMN NAME = "SET" COLUMN_NUMBER = 1 UNIT = "N/A" DATA_TYPE = INTEGER START_BYTE = 1 BYTES = 4 FORMAT = "I4" DESCRIPTION = "EACH SET CORRESPONDS TO A SUN DETECTION." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "TIME 1" COLUMN_NUMBER = 2 UNIT = "SECOND*10**-4" DATA_TYPE = INTEGER START_BYTE = 5 BYTES = 11 FORMAT = "I11" DESCRIPTION = "MISSION TIME OF FIRST SUN PULSE." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "TIME 2" COLUMN_NUMBER = 3 UNIT = "SECOND*10**-4" DATA_TYPE = INTEGER START_BYTE = 16 BYTES = 11 FORMAT = "I11" DESCRIPTION = "MISSION TIME OF SECOND SUN PULSE." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "TIME 3" COLUMN_NUMBER = 4 UNIT = "SECOND*10**-4" DATA_TYPE = INTEGER START_BYTE = 27 BYTES = 11 FORMAT = "I11" DESCRIPTION = "MISSION TIME OF THIRD SUN PULSE." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DN" COLUMN_NUMBER = 5 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 38 BYTES = 8 FORMAT = "I8" DESCRIPTION = "SUN SENSOR DETECTOR AMPLITUDE" END_OBJECT = COLUMN END_OBJECT = TABLE END SAMPLE SUN DATA PRINTOUT... DISR SUN SENSOR PULSE TIMES (SEC*E-4) & AMPLITUDE (DN) SET TIME_1 TIME_2 TIME_3 AMPLITUDE 1 13207354 13209090 13210890 255 2 13271220 13272619 13274226 260 3 13879616 13882097 13884151 230 4 13953052 13954216 13955572 234 5 14024419 14028125 14031315 209 5.10 TIME LABEL PDS_VERSION_ID = PDS3 LABEL_REVISION_NOTE = "Sat Jan 11 21:12:55 2014 , C. See" RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 40 FILE_RECORDS = 22 ^HEADER = ("TIME_0001_00102_S_144_KM.TAB",1) ^TABLE = ("TIME_0001_00102_S_144_KM.TAB",3) DATA_SET_ID = "HP-SSA-DISR-2/3-EDR/RDR-V1.1" PRODUCT_ID = "TIME_0001_MTIME_00_01_42_0000_DISR" SEQUENCE_NUMBER = 0001 PRODUCT_CREATION_TIME = 2014-01-11T21:12:55 /*UTC*/ MISSION_NAME = "CASSINI-HUYGENS" INSTRUMENT_HOST_NAME = "HUYGENS PROBE" INSTRUMENT_HOST_ID = HP TARGET_NAME = TITAN MISSION_PHASE_NAME = DESCENT INSTRUMENT_ID = DISR INSTRUMENT_NAME = "DESCENT IMAGER SPECTRAL RADIOMETER" INSTRUMENT_TYPE = {"IMAGER","RADIOMETER","SPECTROMETER"} PRODUCER_ID = DISR PRODUCER_INSTITUTION_NAME = "UNIVERSITY OF ARIZONA" PRODUCER_FULL_NAME = "CHARLES (CHUCK) SEE" PRODUCT_TYPE = EDR START_TIME = 2005-01-14T09:12:03.000 /*UTC*/ STOP_TIME = 2005-01-14T09:12:41.000 /*UTC*/ SPACECRAFT_CLOCK_START_COUNT = 102.000 /* DDB time in seconds.fff */ SPACECRAFT_CLOCK_STOP_COUNT = 140.000 /* DDB time in seconds.fff */ FILE_NAME = "TIME_0001_00102_S_144_KM.TAB" PREDICTED_ALTITUDE = 158.799 /* Real-Time from DDB */ SPACECRAFT_ALTITUDE_START = 144.978 /* Reconstruction, Note 1 */ SPACECRAFT_ALTITUDE_END = 142.940 AZIMUTH_START = 290.23 /* CCW From Sun, Note 3 */ AZIMUTH_END = 50.72 AZIMUTH_NORTH_START = 182.49 /* CW From North, Note 4 */ AZIMUTH_NORTH_END = 62.02 SPIN_RATE = 5.44 /* CCW POSITIVE, Noted 2,8 */ ROTATIONS = 3.45 /* CCW +, Note 8 */ HUYGENS:EW_TILT_ANGLE_START = 13.50 /* + for East tip, Note 6 */ HUYGENS:EW_TILT_ANGLE_END = 10.20 INSTRUMENT_TEMPERATURE = (259.06, "UNK", 269.80, 270.45, 266.07, 258.49, 264.08, 269.57, 275.50, 274.65, 286.61) /* KELVIN */ INSTRUMENT_TEMPERATURE_POINT = ("CCD_T1","REF_T2","IRB_T3", "IRE_T4","CCDLUG_T5","STRAP_T6", "OPTICS_T7","VIOLET_T8","SH_AUX_T9", "SH_BOX_T10","EA_BOX_T11") NATIVE_START_TIME = 102.0000 NATIVE_STOP_TIME = 140.0000 DESCRIPTION = " This is data from the DISR Time datasets. The time datasets record the Huygens Descent Data Broadcast (DDB) time and corresponding DISR internal clock time at each DDB (2 seconds). Since the clocks start at different times, there is always an offset. If the offset changes significantly (due to drift etc) the instrument may make small (0.0002 second) time corrections, which can effect time based measurements, such as the spin rate. Notes: 1) The altitudes are from the DTWG release in June of 2011. 2) The probe azimuth & tilt are updated to the March 2013 Karkoschka analysis. 3) AZIMUTH... is degrees counter clockwise from the Sun, viewed from Nadir. 4) AZIMUTH_NORTH... is degrees clockwise from North, as viewed from Nadir. 5) These data are from ESOC stream 524(b). 6) Positive tilt is parachute East of probe (spin axis tipped East) 7) Temperatures are reported at the mid point (in time) of the observation. 8) ROTATIONS are approximate & are based on the local average spin rate. A list of the header entries from the source XDR format file are shown below for reference. The official label data (above) takes precedence over any conflicting information presented below (i.e. azimuths, temps., etc): filename_pre: C:\df3\15Jan05\Log\524B\DB2\Time\ original_filename: V_00001T_MMX_00%01%42_0000_Tme date_of_data_replay: Wed Feb 09 11:08:58 2005 dimensions: 2 num_cols: 2 num_rows: 20 data_type: 3, 32 bit integer date_replayed: Wed Feb 09 11:08:33 2005 engineer: Chuck See set_name: Time ccd_t1: 259.40 Kelvin CCD_id_no: 93 gse_ver: Windows_GSE test_log: C:\df3\14Jan05\Log\stream_524b\DB2\Time ESOC_File: C:\df3\15Jan05\ESOC_Files\o524sd__.1h_ set_id: 2 (TIME) seq_num: 1 m_time: 102.0000 seconds DDB altitude: 158.799 km thermistor_I: 2.0460 mA ccdlug_t5: 261.6 Kelvin strap_t: 258.9 Kelvin optics_t: 264.2 Kelvin violet_t: 263.9 Kelvin SH_aux_t: 275.7 Kelvin SH_box_t: 274.2 Kelvin EA_box_t: 287.1 Kelvin Aux_volt: 11.9 Volts cpu_volt: 5.0 Volts adc_offset: 2.440 mV disp_q_size: 6 alarm_q_size: 10 tlm_q_size: 0 sci_pro_q: 5 stack_size: 1471 num_time_pairs: 20 disr_model: DISR3 " OBJECT = HEADER HEADER_TYPE = TEXT BYTES = 40 RECORDS = 2 INTERCHANGE_FORMAT = ASCII DESCRIPTION = "The first 2 lines of the file contain the column headers." END_OBJECT = HEADER OBJECT = TABLE INTERCHANGE_FORMAT = ASCII COLUMNS = 3 ROWS = 20 ROW_BYTES = 25 DESCRIPTION = "TABLE COMPARING PROBE DDB TIME TO DISR INTERNAL CLOCK TIME." OBJECT = COLUMN NAME = "ROW" COLUMN_NUMBER = 1 UNIT = "N/A" DATA_TYPE = INTEGER START_BYTE = 1 BYTES = 4 FORMAT = "I4" DESCRIPTION = "ROW NUMBER " END_OBJECT = COLUMN OBJECT = COLUMN NAME = "TIME 1" COLUMN_NUMBER = 2 UNIT = "SECOND*10**-4" DATA_TYPE = INTEGER START_BYTE = 5 BYTES = 10 FORMAT = "I10" DESCRIPTION = "HUYGENS PROBE DDB TIME" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "TIME 2" COLUMN_NUMBER = 3 UNIT = "SECOND*10**-4" DATA_TYPE = INTEGER START_BYTE = 15 BYTES = 10 FORMAT = "I10" DESCRIPTION = "INTERNAL DISR CLOCK TIME" END_OBJECT = COLUMN END_OBJECT = TABLE END SAMPLE TIME DATA PRINTOUT... EPOCH DDB_TIME DISR_CLOCK SEC*E-4 SEC*E-4 1 1020000 217956 2 1040000 237956 3 1060000 257956 4 1080000 277957 5 1100000 297957 6 1120000 317957 7 1140000 337957 8 1160000 357958 9 1180000 377958 10 1200000 397958 11 1220000 417958 12 1240000 437959 13 1260000 457959 14 1280000 477959 15 1300000 497959 16 1320000 517960 17 1340000 537960 18 1360000 557960 19 1380000 577960 20 1400000 597961 5.11 VIOLET LABEL PDS_VERSION_ID = PDS3 LABEL_REVISION_NOTE = "Sat Jan 11 22:11:56 2014 , C. See" RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 10 FILE_RECORDS = 2 ^HEADER = ("VIOLET_0001_00144_S_143_KM.TAB",1) ^TABLE = ("VIOLET_0001_00144_S_143_KM.TAB",2) DATA_SET_ID = "HP-SSA-DISR-2/3-EDR/RDR-V1.1" PRODUCT_ID = "VIOLET_0001_MTIME_00_02_24_2528_DISR" SEQUENCE_NUMBER = 0001 MEASUREMENT_TYPE = DLV PRODUCT_CREATION_TIME = 2014-01-11T22:11:56 /*UTC*/ MISSION_NAME = "CASSINI-HUYGENS" INSTRUMENT_HOST_NAME = "HUYGENS PROBE" INSTRUMENT_HOST_ID = HP TARGET_NAME = TITAN MISSION_PHASE_NAME = DESCENT INSTRUMENT_ID = DISR INSTRUMENT_NAME = "DESCENT IMAGER SPECTRAL RADIOMETER" INSTRUMENT_TYPE = {"IMAGER","RADIOMETER","SPECTROMETER"} PRODUCER_ID = DISR PRODUCER_INSTITUTION_NAME = "UNIVERSITY OF ARIZONA" PRODUCER_FULL_NAME = "CHARLES (CHUCK) SEE" PRODUCT_TYPE = EDR START_TIME = 2005-01-14T09:12:45.253 /*UTC*/ STOP_TIME = 2005-01-14T09:12:45.253 /*UTC*/ SPACECRAFT_CLOCK_START_COUNT = 144.253 /* DDB time in seconds.fff */ SPACECRAFT_CLOCK_STOP_COUNT = 144.253 /* DDB time in seconds.fff */ FILE_NAME = "VIOLET_0001_00144_S_143_KM.TAB" PREDICTED_ALTITUDE = 152.615 /* Real-Time from DDB */ SPACECRAFT_ALTITUDE_START = 142.744 /* Reconstruction, Note 1 */ SPACECRAFT_ALTITUDE_END = 142.744 DESIRED_AZIMUTH = 180.00 /* CCW From Sun, Note 3 */ PREDICTED_AZIMUTH = 177.97 AZIMUTH_START = 177.41 /* CCW From Sun, Note 3 */ AZIMUTH_END = 177.41 AZIMUTH_NORTH_START = 295.34 /* CW From North, Note 4 */ AZIMUTH_NORTH_END = 295.34 SPIN_RATE_AVERAGE = 4.95 /* CCW POSITIVE, Notes 2, 8 */ HUYGENS:EW_TILT_ANGLE_START = 9.67 /* + for East tip, Note 6 */ HUYGENS:EW_TILT_ANGLE_END = 9.67 INSTRUMENT_TEMPERATURE = (258.80, "UNK", 269.99, 270.60, 266.12, 258.56, 264.10, 269.57, 275.53, 274.56, 286.70) /* KELVIN */ INSTRUMENT_TEMPERATURE_POINT = ("CCD_T1","REF_T2","IRB_T3", "IRE_T4","CCDLUG_T5","STRAP_T6", "OPTICS_T7","VIOLET_T8","SH_AUX_T9", "SH_BOX_T10","EA_BOX_T11") LAMP_STATE = 0000 NATIVE_START_TIME = 144.2528 NATIVE_STOP_TIME = 144.2528 DESCRIPTION = " This is data from the DISR Violet Photometers. Two filterd Si detectors record the up or down looking radiance over the band from 350 to 480 nm. The photometers observe nearly pi stradians (170 deg azimuth, and from 5 to 88 degs from Nadir and Zenith). Notes: 1) The altitudes are from the DTWG release in June of 2011. 2) The probe azimuth & tilt are updated to the March 2013 Karkoschka analysis. 3) AZIMUTH... is degrees counter clockwise from the Sun, viewed from Nadir. 4) AZIMUTH_NORTH... is degrees clockwise from North, as viewed from Nadir. 5) These data are from ESOC stream 524(b). 6) Positive tilt is parachute East of probe (spin axis tipped East) 7) Temperatures are reported at the mid point (in time) of the observation. 8) SPIN_RATE is approximate & based on the local average spin rate, CCW postiv. A list of the header entries from the source XDR format file are shown below for reference. The official label data (above) takes precedence over any conflicting information presented below (i.e. azimuths, temps., etc): filename_pre: C:\df3\15Jan05\Log\524B\DB2\Violet\ original_filename: V_00001V_MMX_00%02%24_2528_Vlt date_of_data_replay: Wed Feb 09 11:09:30 2005 dimensions: 0 num_cols: 1 num_rows: 0 data_type: 2, 16 bit integer date_replayed: Wed Feb 09 11:08:33 2005 engineer: Chuck See set_name: Violet ccd_t1: 259.40 Kelvin detector: VIOLET CCD_id_no: 93 gse_ver: Windows_GSE test_log: C:\df3\14Jan05\Log\stream_524b\DB2\Violet ESOC_File: C:\df3\15Jan05\ESOC_Files\o524sd__.1h_ set_id: 17 (VIOLET) seq_num: 1 m_time: 144.25 seconds after T0 cycle_num: 1 dataset type: 6 (DLV) DDB altitude: 152.615 km target azimuth: 180.000 deg CCW Sun predicted azimuth: 177.970 deg CCW Sun lamp states: 0000 thermistor_I: 2.046 mA ccdlug_t5: 261.6 Kelvin strap_t: 258.9 Kelvin optics_t: 264.2 Kelvin violet_t: 264.0 Kelvin SH_aux_t: 275.7 Kelvin SH_box_t: 274.2 Kelvin EA_box_t: 287.1 Kelvin Aux_volt: 11.9 Volts cpu_volt: 5.0 Volts adc_offset: 2.4 mV disp_q_size: 6 alarm_q_size: 10 tlm_q_size: 0 sci_pro_q: 5 stack_size: 1471 disr_model: DISR3 photometer_reading: 379 " OBJECT = HEADER HEADER_TYPE = TEXT BYTES = 10 RECORDS = 1 INTERCHANGE_FORMAT = ASCII DESCRIPTION = "The first line of the file contains the measurement type (ULV or DLV)." END_OBJECT = HEADER OBJECT = TABLE INTERCHANGE_FORMAT = ASCII ROWS = 1 COLUMNS = 1 ROW_BYTES = 10 DESCRIPTION = "A SINGLE MEASUREMENT FROM THE VIOLET PHOTOMETER" OBJECT = COLUMN NAME = "DN" COLUMN_NUMBER = 1 UNIT = "N/A" DATA_TYPE = INTEGER START_BYTE = 1 BYTES = 10 DESCRIPTION = "A SINGLE READING FROM THE DLV PHOTOMETER" END_OBJECT = COLUMN END_OBJECT = TABLE END SAMPLE VIOLET DATA PRINTOUT... DLV 379 5.12 VISIBLE LABEL PDS_VERSION_ID = PDS3 LABEL_REVISION_NOTE = "Sat Jan 11 23:40:20 2014 , C. See" RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 85 FILE_RECORDS = 202 ^HEADER = ("VISIBL_0001_00143_S_143_KM.TAB",1) ^TABLE = ("VISIBL_0001_00143_S_143_KM.TAB",3) DATA_SET_ID = "HP-SSA-DISR-2/3-EDR/RDR-V1.1" PRODUCT_ID = "VISIBLE_0001_MTIME_00_02_23_0117_DISR" SEQUENCE_NUMBER = 0001 MEASUREMENT_TYPE = DLVS COLUMNS = 10 PRODUCT_CREATION_TIME = 2014-01-11T23:40:20 /*UTC*/ MISSION_NAME = "CASSINI-HUYGENS" INSTRUMENT_HOST_NAME = "HUYGENS PROBE" INSTRUMENT_HOST_ID = HP TARGET_NAME = TITAN MISSION_PHASE_NAME = DESCENT INSTRUMENT_ID = DISR INSTRUMENT_NAME = "DESCENT IMAGER SPECTRAL RADIOMETER" INSTRUMENT_TYPE = {"IMAGER","RADIOMETER","SPECTROMETER"} PRODUCER_ID = DISR PRODUCER_INSTITUTION_NAME = "UNIVERSITY OF ARIZONA" PRODUCER_FULL_NAME = "CHARLES (CHUCK) SEE" PRODUCT_TYPE = EDR START_TIME = 2005-01-14T09:12:44.012 /*UTC*/ STOP_TIME = 2005-01-14T09:12:44.310 /*UTC*/ SPACECRAFT_CLOCK_START_COUNT = 143.012 /* DDB time in seconds.fff */ SPACECRAFT_CLOCK_STOP_COUNT = 143.310 /* DDB time in seconds.fff */ FILE_NAME = "VISIBL_0001_00143_S_143_KM.TAB" EXPOSURE_DURATION = 298.500 EXPOSURE_TYPE = AUTO PREDICTED_ALTITUDE = 152.715 /* Real-Time from DDB */ SPACECRAFT_ALTITUDE_START = 142.801 /* Reconstruction, Note 1 */ SPACECRAFT_ALTITUDE_END = 142.787 DESIRED_AZIMUTH = 152.00 /* CCW From Sun, Note 3 */ PREDICTED_AZIMUTH = 128.24 AZIMUTH_START = 140.60 /* CCW From Sun, Note 3 */ AZIMUTH_END = 149.46 AZIMUTH_NORTH_START = 332.15 /* CW From North, Note 4 */ AZIMUTH_NORTH_END = 323.29 SPIN_RATE = 5.05 /* CCW POSITIVE, Notes 2,8 */ ROTATIONS = 0.03 /* CCW +, Note 8 */ HUYGENS:EW_TILT_ANGLE_START = 9.85 /* + for East tip, Note 6 */ HUYGENS:EW_TILT_ANGLE_END = 9.80 INSTRUMENT_TEMPERATURE = (258.81, "UNK", 269.98, 270.59, 266.12, 258.56, 264.10, 269.57, 275.53, 274.56, 286.70) /* KELVIN */ INSTRUMENT_TEMPERATURE_POINT = ("CCD_T1","REF_T2","IRB_T3", "IRE_T4","CCDLUG_T5","STRAP_T6", "OPTICS_T7","VIOLET_T8","SH_AUX_T9", "SH_BOX_T10","EA_BOX_T11") LAMP_STATE = 0000 NULL_PIXEL_2 = 66.0000 NULL_PIXEL_3 = 55.0000 NATIVE_START_TIME = 143.0117 NATIVE_STOP_TIME = 143.3102 DESCRIPTION = " This is data from the DISR visible wavelength spectrometers. The DISR contains two: the Upward Looking Visible Spectrometer (ULVS) and the Downward Looking Visible Spectrometer (DLVS). Both have 200 spectral elements covering the wavelength range from 480 to 960 nm. The ULVS observes basically Pi stradians (170 deg azimuth and 5 to 88 deg Zenith angle). The DLVS observes a spot centered on the SSL (4 deg azimuth by 10 to 50 deg Nadir). The ULVS occupies 8 x 200 pixels on the CCD. The data is row summed by 4s resulting in 2 rows of data, right and left half of the sky. The DLVS is 20 x 200 pixels and relayed either raw or summed in 10, 5 or 2 columns depending on the data collection mode (descent cycle). Notes: 1) The altitudes are from the DTWG release in June of 2011. 2) The probe azimuth & tilt are updated to the March 2013 Karkoschka analysis. 3) AZIMUTH... is degrees counter clockwise from the Sun, viewed from Nadir. 4) AZIMUTH_NORTH... is degrees clockwise from North, as viewed from Nadir. 5) These data are from ESOC stream 524(b). 6) Positive tilt is parachute East of probe (spin axis tipped East) 7) Temperatures are reported at the mid point (in time) of the observation. 8) ROTATIONS are approximate & are based on the local average spin rate. A list of the header entries from the source XDR format file are shown below for reference. The official label data (above) takes precedence over any conflicting information presented below (i.e. azimuths, temps., etc): filename_pre: C:\df3\15Jan05\Log\524B\DB2\Visible\ original_filename: V_00001B_MMX_00%02%23_0117_Vis date_of_data_replay: Wed Feb 09 11:12:13 2005 dimensions: 2 num_cols: 10 num_rows: 200 data_type: 2, 16 bit integer date_replayed: Wed Feb 09 11:08:33 2005 engineer: Chuck See set_name: Visible ccd_t1: 258.60 Kelvin detector: CCD CCD_id_no: 93 exp_time: 298.50 ms coord_x col1: 33 coord_y col1: 1 gse_ver: Windows_GSE test_log: C:\df3\14Jan05\Log\stream_524b\DB2\Visible ESOC_File: C:\df3\15Jan05\ESOC_Files\o524sd__.1h_ set_id: 10 (VISIBLE) seq_num: 1 m_time: 143.01 seconds after T0 cycle_num: 1 dataset type: 16 (DLVS) DDB altitude: 152.715 km target azimuth: 152.000 deg CCW Sun predicted azimuth: 128.240 deg CCW Sun lamp states: 0000 ccd_stat: 0 ccd_flag: 1110 proc_flag: 111001 bad_pixels: replaced summing: summed S/W Compression: compressed Square Root Proc: not square rooted H/W Compression: not compressed Exposure Control: automatic cols_sent: 10 null_col2: 66 DN null_col3: 55 DN ccd_tgt_pct: 50 ccd_prctile: 97 thermistor_I: 2.0460 mA ccdlug_t5: 261.6 Kelvin strap_t: 258.9 Kelvin optics_t: 264.2 Kelvin violet_t: 263.9 Kelvin SH_aux_t: 275.7 Kelvin SH_box_t: 274.2 Kelvin EA_box_t: 287.1 Kelvin Aux_volt: 11.9 Volts cpu_volt: 5.0 Volts adc_offset: 2.4 mV disp_q_size: 6 alarm_q_size: 10 tlm_q_size: 0 sci_pro_q: 5 stack_size: 1471 comp_ratio: 1.830 disr_model: DISR3 Pixel min, max & mean (Range: 0 to 8190): 44, 2158, 957.84 " OBJECT = HEADER HEADER_TYPE = TEXT BYTES = 85 RECORDS = 2 INTERCHANGE_FORMAT = ASCII DESCRIPTION = "The first 2 lines of the file contain info about the measurement and the column headers." END_OBJECT = HEADER OBJECT = TABLE INTERCHANGE_FORMAT = ASCII COLUMNS = 11 ROWS = 200 ROW_BYTES = 85 DESCRIPTION = "DLVS DATA SUMMED INTO TEN COLUMNS" OBJECT = COLUMN NAME = "ROW" COLUMN_NUMBER = 1 UNIT = "N/A" DATA_TYPE = INTEGER START_BYTE = 1 BYTES = 4 FORMAT = "I4" DESCRIPTION = "ROW NUMBER - SPECTRAL DIMENSION" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DLVS_COLM_1_OF_10" COLUMN_NUMBER = 2 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 5 BYTES = 8 FORMAT = "I8" DESCRIPTION = "SUM OF CCD COLS 14 & 15" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DLVS_COLM_2_OF_10" COLUMN_NUMBER = 3 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 13 BYTES = 8 FORMAT = "I8" DESCRIPTION = "SUM OF CCD COLS 16 & 17" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DLVS_COLM_3_OF_10" COLUMN_NUMBER = 4 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 21 BYTES = 8 FORMAT = "I8" DESCRIPTION = "SUM OF CCD COLS 18 & 19" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DLVS_COLM_4_OF_10" COLUMN_NUMBER = 5 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 29 BYTES = 8 FORMAT = "I8" DESCRIPTION = "SUM OF CCD COLS 20 & 21" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DLVS_COLM_5_OF_10" COLUMN_NUMBER = 6 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 37 BYTES = 8 FORMAT = "I8" DESCRIPTION = "SUM OF CCD COLS 22 & 23" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DLVS_COLM_6_OF_10" COLUMN_NUMBER = 7 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 45 BYTES = 8 FORMAT = "I8" DESCRIPTION = "SUM OF CCD COLS 24 & 25" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DLVS_COLM_7_OF_10" COLUMN_NUMBER = 8 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 53 BYTES = 8 FORMAT = "I8" DESCRIPTION = "SUM OF CCD COLS 26 & 27" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DLVS_COLM_8_OF_10" COLUMN_NUMBER = 9 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 61 BYTES = 8 FORMAT = "I8" DESCRIPTION = "SUM OF CCD COLS 28 & 29" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DLVS_COLM_9_OF_10" COLUMN_NUMBER = 10 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 69 BYTES = 8 FORMAT = "I8" DESCRIPTION = "SUM OF CCD COLS 30 & 31" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DLVS_COLM_10_OF_10" COLUMN_NUMBER = 11 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 77 BYTES = 8 FORMAT = "I8" DESCRIPTION = "SUM OF CCD COLS 32 & 33" END_OBJECT = COLUMN END_OBJECT = TABLE END SAMPLE VISIBLE DATA PRINTOUT... DISR DOWN LOOKING VISIBLE SPECTROMETER (DLVS) SUMMED TWO TO A COLUMN. SET: 1 ROW C14+15 C16+17 C18+19 C20+21 C22+23 C24+25 C26+27 C28+29 C30+31 C32+33 1 44 62 56 50 64 60 58 62 63 66 2 47 53 57 59 61 67 69 64 66 72 3 52 56 79 66 67 60 81 65 67 79 4 69 78 55 65 58 77 68 70 70 89 5 54 60 68 62 68 62 71 87 70 66 6 58 71 66 70 76 72 72 69 70 77 7 73 66 70 87 83 84 77 87 76 77 8 62 70 76 88 75 80 78 90 80 94 9 63 82 85 78 87 86 89 93 95 94 10 68 102 90 98 124 96 101 107 108 115 11 89 104 87 93 100 100 105 105 105 125 12 94 100 111 101 107 112 118 121 114 128 13 89 122 110 112 133 115 128 119 123 132 14 87 109 163 122 136 147 130 129 125 138 15 97 143 129 136 131 144 143 140 143 145 16 101 148 139 157 149 150 156 156 159 151 to row: 200 5.13 VISIBLE_EX LABEL PDS_VERSION_ID = PDS3 LABEL_REVISION_NOTE = "Sat Jan 11 22:55:39 2014 , C. See" RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 21 FILE_RECORDS = 202 ^HEADER = ("VIS_EX_0001_00143_S_143_KM.TAB",1) ^TABLE = ("VIS_EX_0001_00143_S_143_KM.TAB",3) DATA_SET_ID = "HP-SSA-DISR-2/3-EDR/RDR-V1.1" PRODUCT_ID = "VIS_EX_0001_MTIME_00_02_23_0117_DISR" SEQUENCE_NUMBER = 0001 MEASUREMENT_TYPE = DLVS_EXT PRODUCT_CREATION_TIME = 2014-01-11T22:55:39 /*UTC*/ MISSION_NAME = "CASSINI-HUYGENS" INSTRUMENT_HOST_NAME = "HUYGENS PROBE" INSTRUMENT_HOST_ID = HP TARGET_NAME = TITAN MISSION_PHASE_NAME = DESCENT INSTRUMENT_ID = DISR INSTRUMENT_NAME = "DESCENT IMAGER SPECTRAL RADIOMETER" INSTRUMENT_TYPE = {"IMAGER","RADIOMETER","SPECTROMETER"} PRODUCER_ID = DISR PRODUCER_INSTITUTION_NAME = "UNIVERSITY OF ARIZONA" PRODUCER_FULL_NAME = "CHARLES (CHUCK) SEE" PRODUCT_TYPE = EDR START_TIME = 2005-01-14T09:12:44.012 /*UTC*/ STOP_TIME = 2005-01-14T09:12:44.310 /*UTC*/ SPACECRAFT_CLOCK_START_COUNT = 143.012 /* DDB time in seconds.fff */ SPACECRAFT_CLOCK_STOP_COUNT = 143.310 /* DDB time in seconds.fff */ FILE_NAME = "VIS_EX_0001_00143_S_143_KM.TAB" EXPOSURE_DURATION = 298.500 EXPOSURE_TYPE = MANUAL PREDICTED_ALTITUDE = 152.715 /* Real-Time from DDB */ SPACECRAFT_ALTITUDE_START = 142.801 /* Reconstruction, Note 1 */ SPACECRAFT_ALTITUDE_END = 142.787 DESIRED_AZIMUTH = 152.00 /* CCW From Sun, Note 3 */ PREDICTED_AZIMUTH = 128.24 AZIMUTH_START = 140.60 /* CCW From Sun, Note 3 */ AZIMUTH_END = 149.46 AZIMUTH_NORTH_START = 332.15 /* CW From North, Note 4 */ AZIMUTH_NORTH_END = 323.29 SPIN_RATE_AVERAGE = 5.05 /* CCW POSITIVE, Notes 2, 8 */ ROTATIONS = 0.03 /* CCW +, Note 8 */ HUYGENS:EW_TILT_ANGLE_START = 9.85 /* + for East tip, Note 6 */ HUYGENS:EW_TILT_ANGLE_END = 9.80 INSTRUMENT_TEMPERATURE = (258.81, "UNK", 269.98, 270.59, 266.12, 258.56, 264.10, 269.57, 275.53, 274.56, 286.70) /* KELVIN */ INSTRUMENT_TEMPERATURE_POINT = ("CCD_T1","REF_T2","IRB_T3", "IRE_T4","CCDLUG_T5","STRAP_T6", "OPTICS_T7","VIOLET_T8","SH_AUX_T9", "SH_BOX_T10","EA_BOX_T11") LAMP_STATE = 0000 NULL_PIXEL_2 = 66.0000 NULL_PIXEL_3 = 55.0000 NATIVE_START_TIME = 143.0117 NATIVE_STOP_TIME = 143.3102 DESCRIPTION = " This is data from the DISR visible wavelength spectrometer extra columns. The VIS_EX columns are dark pixels that lie outside of the visible spectrometer columns on the DISR CCD. They are read at the same time as their corresponding spectrometer (ULVS or DLVS) during observations, and used to eliminate stray light. See DISR Users Guide section 5.10 for details. The ULVS_EX datasets record CCD columns 31 & 49. The DLVS_EX datasets record CCD columns 39 & 49. (both are 2 by 200 pixels). Notes: 1) The altitudes are from the DTWG release in June of 2011. 2) The probe azimuth & tilt are updated to the March 2013 Karkoschka analysis. 3) AZIMUTH... is degrees counter clockwise from the Sun, viewed from Nadir. 4) AZIMUTH_NORTH... is degrees clockwise from North, as viewed from Nadir. 5) These data are from ESOC stream 524(b). 6) Positive tilt is parachute East of probe (spin axis tipped East) 7) Temperatures are reported at the mid point (in time) of the observation. 8) ROTATIONS are approximate & are based on the local average spin rate. A list of the header entries from the source XDR format file are shown below for reference. The official label data (above) takes precedence over any conflicting information presented below (i.e. azimuths, temps., etc): filename_pre: C:\df3\15Jan05\Log\524B\DB2\Visible_Ext\ original_filename: V_00001O_MMX_00%02%23_0117_Vex date_of_data_replay: Wed Feb 09 11:13:26 2005 dimensions: 2 num_cols: 2 num_rows: 200 data_type: 2, 16 bit integer date_replayed: Wed Feb 09 11:08:33 2005 engineer: Chuck See set_name: Visible_Ext ccd_t1: 258.60 Kelvin detector: CCD CCD_id_no: 93 exp_time: 298.50 ms coord_x col1: 2 gse_ver: Windows_GSE test_log: C:\df3\14Jan05\Log\stream_524b\DB2\Visible_Ext ESOC_File: C:\df3\15Jan05\ESOC_Files\o524sd__.1h_ set_id: 19 (VIS_EX) seq_num: 1 m_time: 143.01 seconds after T0 cycle_num: 1 dataset type: 30 (DLVS_EXT) DDB altitude: 152.715 km target azimuth: 152.000 deg CCW Sun predicted azimuth: 128.240 deg CCW Sun lamp states: 0000 ccd_stat: 0 ccd_flag: 1110 proc_flag: 1000 bad_pixels: not replaced summing: unsummed S/W Compression: compressed Square Root Proc: not square rooted H/W Compression: not compressed Exposure Control: manual cols_sent: 2 null_col2: 66 DN null_col3: 55 DN ccd_tgt_pct: 0 ccd_prctile: 0 thermistor_I: 2.0460 mA ccdlug_t5: 261.6 Kelvin strap_t: 258.9 Kelvin optics_t: 264.2 Kelvin violet_t: 263.9 Kelvin SH_aux_t: 275.7 Kelvin SH_box_t: 274.2 Kelvin EA_box_t: 287.1 Kelvin Aux_volt: 11.9 Volts cpu_volt: 5.0 Volts adc_offset: 2.4 mV disp_q_size: 6 alarm_q_size: 10 tlm_q_size: 0 sci_pro_q: 5 stack_size: 1471 comp_ratio: 3 disr_model: DISR3 Pixel min, max & mean (Range: 0 to 4095): 21, 190, 82.16 " OBJECT = HEADER HEADER_TYPE = TEXT BYTES = 21 RECORDS = 2 INTERCHANGE_FORMAT = ASCII DESCRIPTION = "The first 2 lines of the file contain info about the measurement and the column headers." END_OBJECT = HEADER OBJECT = TABLE INTERCHANGE_FORMAT = ASCII COLUMNS = 3 ROWS = 200 ROW_BYTES = 21 DESCRIPTION = "CCD COLUMNS TO BE USED FOR BLEED-THRU COMPENSATION FOR DLVS COLUMNS" OBJECT = COLUMN NAME = "ROW_NO" COLUMN_NUMBER = 1 UNIT = "N/A" DATA_TYPE = INTEGER START_BYTE = 1 BYTES = 4 FORMAT = "I4" DESCRIPTION = "SPECTROMETER ROW NUMBER" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "COLUMN1" COLUMN_NUMBER = 2 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 5 BYTES = 8 FORMAT = "I8" DESCRIPTION = "CCD READINGS IN COLUMN 39" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "COLUMN2" COLUMN_NUMBER = 3 UNIT = "DN" DATA_TYPE = INTEGER START_BYTE = 13 BYTES = 8 FORMAT = "I8" DESCRIPTION = "CCD READINGS IN COLUMN 49" END_OBJECT = COLUMN END_OBJECT = TABLE END SAMPLE VISIBLE_EX DATA PRINTOUT... DLVS EXTRA COLUMNS. ROW COL-39 COL-49 1 26 68 2 28 70 3 46 76 4 29 78 5 25 80 6 24 85 7 29 93 8 24 93 9 21 101 10 24 89 11 26 90 to row: 200 6. Revisions to Earlier Data Volumes ___________________________________________ Corrections made to earlier data volumes... Revised Dataset: HP-SSA-DISR-2/3-EDR/RDR-V1.0 Data Changes... No errors were found in the archived data; however a more photometrically accurate method of processing the Image data has been found, and the improved images have been added in the EXTRAS\IMAGE_ELEMENTS directory. Many improvements have been made to the supporting information contained in the label files. * A detailed list of the data changes... 1) Image elements with improved photometry have been added to the volume under: EXTRAS\IMAGE_ELEMENTS. Besides the raw imaged, improved flat fields, the dark current parameters, and the square-root compression tables have been added along with information on how to process the images. 2) Altitudes reported in the label files have been updated to reflect the newer Descent Trajectory Working Group (DTWG) release from June of 2011. 3) Label file values for Azimuth, Spin Rate, & E/W tilt are updated to be in line with the March 2013 Karkoschka analysis. 4) The probe Azimuth, Altitude & Tilt are reported at both the beginning and end of the observation (previously reported only at the beginning). 5) Added 'SPIN_RATE' keyword to most label files to allow the user to determine the direction of the azimuth progression. 6) The DISR temperature array has been expanded to include all available instrument measured temperatures (in Label Files), not just selected values as before, as some analyses have shown additional temperature dependencies. 7) Temperatures are reported at the mid-point (in time) of the measurement, rather than at the beginning. This allows more accuracy for long exposure measurements. 8) A better explanation of the azimuth definition is included in the DESCRIPTION elements. 9) The DESCRIPTION fields have been expanded to provide a more complete explanation of the dataset. 10) Where appropriate the 'EXPOSURE_TYPE' keyword was added to describe if the observation was automatically or manually exposed to help distinguish the calibration measurements. 11) The 'NULL_PIXEL' keywords were added to CCD measurements to allow determination of the dark-current offset. 12) A more complete data re-play that includes partial datasets was used. 13) Filenames and Product ID's have been revised to include more information. 14) Added reconstructed altitude, azimuth and spin information to DESCENT datasets to juxtapose real-time software values to the actuals. 15) Added XDR formatted images to the DATA/IMAGERS directory. 16) Replaced NASAView formatted (IMG) images with more generic TIFF images. 17) Added IMAGE_ID keyword to image labels to help user determine the format (MRI, SLI, HRI) of the dataset. 18) Added note to image labels pointing out the error in the on-board flat fields for the Medium Resolution Imagers (MRI). 19) Added 'MEASUREMENT_TYPE' keyword to IR spectrometer labels to help user determine the type of IR measurement (ULIS, DLIS, IR_COMB, IR,LONG, etc). 20) Added "ROTATIONS' keyword to the IR spectrometer labels to help the user determine the spectrometer pointing history. 21) Added table column headers to make the data more understandable. 22) Added 'COLUMNS' keyword to the Visible Spectrometer label files to allow the user to determine the amount of column summing used. 23) Corrected many small errors including the syntax and offset for the pointers in the label files. * New Keywords Added... 1) SPACECRAFT_ALTITUDE_START = The reconstructed altitude of the probe at the start of the measurement. 2) SPACECRAFT_ALTITUDE_END = The reconstructed altitude of the probe at the end of the measurement. 3) PREDICTED_ALTITUDE = The real-time altitude (km) as predicted by the Huygens probe and relayed to the instrument via the Descent Data Broadcast (DDB). 4) AZIMUTH_START = The reconstructed pointing direction of the DISR instrument at the start of the observation. The angle is defined as being in a plane perpendicular to the Nadir vector (i.e. horizontal), measured in degrees Counterclockwise (CCW) from the vector to the Sun, as viewed from above. 5) AZIMUTH_END = The reconstructed pointing direction of the DISR instrument at the end of the observation. The angle is defined as being in a plane perpendicular to the Nadir vector (i.e. horizontal), measured in degrees Counterclockwise (CCW) from the vector to the Sun, as viewed from above. 6) AZIMUTH_NORTH_START = The same as AZIMUTH_START, except measured in degrees Clockwise (CW) from true North (Titan's spin vector) viewed from above, as one would for standard compass directions. 7) AZIMUTH_NORTH_START = The same as AZIMUTH_END, except measured in degrees Clockwise (CW) from true North (Titan's spin vector), viewed from above, as one would for standard compass directions. 8) SPIN_RATE = The approximate average spin rate (in RPM) of the Huygens probe during the measurement as determined by a polynomial fit to the local spin-rate observations. The sense is CCW positive in keeping with the original intended spin direction of the probe. 9) ROTATIONS = The number (or fraction) of spin revolutions the probe makes during the observation, CCW from above defined as positive. 10) SPIN_RATE_START = The instantaneous, re-constructed spin rate (in RPM) at the start of the observation, CCW from above defined as positive. 11) SPIN_RATE_END = The instantaneous, re-constructed spin rate (in RPM) at the end of the observation, CCW from above defined as positive. 12) HUYGENS:EW_TILT_ANGLE_START = The tilt of the Huygens probe spin axis at the start of the observation. The tilt is measured relative to the Zenith vector in the East/West direction. Positive tilt is defined as the spin vector being East of Zenith (i.e. the parachute being east of the probe). 13) HUYGENS:EW_TILT_ANGLE_END = The tilt of the Huygens probe spin axis at the end of the observation. The tilt is measured relative to the Zenith vector in the East/West direction. Positive tilt is defined as the spin vector being East of Zenith (i.e. the parachute being east of the probe). 14) DESCENT_CYCLE_NAME = The name of the descent cycle (Image, Non-Image, etc) that the observation was in. This can often effect data collection externalities such as azimuth timing, exposure time, column summing, etc. 15) NULL_PIXEL_2 & NULL_PIXEL_3 = Readout of covered pixels on the CCD chip which are needed to determine the dark current offset for the observation. 16) MEASUREMENT_TYPE = Distinguishes between sub-types within the DISR sub- instruments, such as Upward Looking vs. Downward Looking for the Visible Spectrometer. 17) IMAGE_ID = Distinguishes type of image dataset; Medium Resolution, High Resolution, or Side Looking. 18) EXPOSURE_TYPE = Distinguishes between Auto-exposed observations and pre-planned, fixed exposure observations. Can be used to identify calibration exposures. * Documentation Revisions... 1) The EAICD has been substantially revised. 2) Added the Visible Spectrometer Calibration Document (\DOCUMENT\ DISR_CALIBRATION_DOCUMENTS\VISIBLE_SPECTROMETERS\VISIBLE_SPECTROMETER_CALDOC), which contains all the details about how the Visible Spectrometers were calibrated. 3) Added the Infra-Red Spectrometer Calibration Document (\DOCUMENT\ DISR_CALIBRATION_DOCUMENTS\INFRARED_SPECTROMETERS\IR_SPECTROMETER_CAL_DOC), which contains all the details about how the Infra-Red Spectrometers were calibrated. 4) Added clarification to section 2.1 of VISIBLE_SPECTROMETER_CAL_NOTES, (\DOCUMENT\DISR_CALIBRATION_DOCUMENTS\VISIBLE_SPECTROMETERS\ VISIBLE_SPECTROMETER_CAL_NOTES). 5) Fixed an error in the IR spectrometer calibration notes (IR_SPECTROMETER_CAL_NOTES) section 2, equation f, and in section 3, the DLIS FWHM equation. 6) Corrected figure 8 of the SUN_SENSOR_CALIBRATION_DOC. 7) Incorporated DISR Archive Users' Guide in DOCUMENTS section of archive.