PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 80 RELEASE_ID = 0003 REVISION_ID = 0000 OBJECT = TEXT INTERCHANGE_FORMAT = ASCII PUBLICATION_DATE = 2009-07-28 NOTE = "N/A" END_OBJECT = TEXT END MARS Express SPICAM LEVEL 0A UV DATA ARCHIVE VOLUME MEXSPI_1001 1. Overview This volume contains Level 0A Ultra Violet (UV) Data Products from observations acquired by the Spectroscopy for the Investigation of Characteristics of the Atmosphere of Mars (SPICAM) instrument on Mars Express (MEX). There are two types of SPICAM level 0A data Products for each UV observation collected: raw records (in the DATA directory) and browse images (in the BROWSE directory). For a complete description of each data product, the user is referred to the DOCUMENT/EAICD text on the archive volume. In the DATA directory,data are stored for the mission phase (MARS) in files with detached label. The MARS directory is then divided into subdirectories corresponding to the different Mars phases defined by the MARS EXPRESS mission planning system (MPS) for the second extended mission phase: MTP043_04685_04784 : 2007 AUG 27 to 2007 SEP 24 (orbit 4685 to 4784) MTP044_04785_04884 : 2007 SEP 24 to 2007 OCT 22 (orbit 4785 to 4884) MTP045_04885_04984 : 2007 OCT 22 to 2007 NOV 18 (orbit 4885 to 4984) with ... MTPnnn : Medium Term Planning nnn (nnn=043,044,045.....) DATA_SET_ID :MEX-M-SPI-2-UVEDR-RAWXMARS-EXT4-V1.0 ----------- CONTENTS DESCRIPTION : Raw ultrat violets records collected during the MARS -------------------- second extended mission phase Data products archived in this volume are copies of files released by the SPICAM team. Errors and anomalies in the original data and comments about the archive are noted in the ERRATA.TXT file. 2. Archive Volume - Concept of Delivery Within the Planetary Science Archive (PSA) the archive volume represents an online delivery. This might be not fully compliant with the PDS standard 3.6, but the PSA itself can after the end of mission produce fully compatible archive volumes. Deliveries are based on the concept of a release and a revision. This concept allows the delivery of experiment data without the delivery of all supplementary information, that has already been delivered at the first initial delivery of a fully PDS compatible Archive Volume, containing the VOLDESC.CAT file and all necessary CATALOG, DOCUMENT, INDEX, DATA, etc directories and their content. Some PDS labels used in the SPICAM Standard Data Archive are specifically related to the concept of release and revision. A data set release (or volume release) contains data from a well-defined period of time and is identified by the RELEASE_ID(4 digit number : [0001:9999]. A volume release is made of at least one revision : the initial revision. The initial revision contains the initial data of a data set release and is identified by a REVISION_ID equal to 0000. A following revision of the data set release (updated files, supplementary files, deleted files) would need the value of the REVISION_ID incremented by one. A release catalog object need to be included in the catalog object to fully describe the release. The release object contains all keyword-value pairs that are necessary to identify a revision within a release. The DESCRIPTION part of the DATA_SET_RELEASE object will contain the full history of the release including all previous revisions. Each revision of a release is added in the release catalog object and all necessary information about this revision is given by a REVISION object. 3. File Formats This section provides a brief description of the files and data objects available on the SPICAM archive volume: text files, PDF files, HTML files, PNG files, and PDS objects.A complete description of each file format is available in the DOCUMENT/EAICD text on the archive volume. Text and detached PDS label files have stream or fixed-length record format, and line lengths of must of 80 characters, including a carriage return (ASCII 13) at the end of the record. This allows the files to be read by MS-DOS/ Windows,Unix, and VMS operating systems. Documents that contain formatting and figures that cannot be rendered as ASCII text are provided as HTML,JPEG or PDF files. The hypertext file contains ASCII text plus hypertext markup language (HTML) commands that enable it to be viewed in a Web browser. The PDF (Portable Document Format) file is a proprietary format of Adobe Systems Incorporated a that can be viewed using the free Acrobat Reader software. PNG "browse" files are provided as a way to quickly view the image contents of a SPICAM observation. A PDS detached label provides descriptive information about the associated file. Most of the PDS labels in the SPICAM Standard Data Archive conform to PDS standards [Planetary Science Data Dictionary, 2001; PDS Standards Reference, 2003]. For examples of the PDS labels used with each type of data product, see the DOCUMENT/SA_MEX_ARCH_003_xx.PDF (or .ASC) text on the archive volume. In general, the PDS label is an object-oriented structure consisting of sets of 'keyword = value' declarations; the object to which the label refers is denoted by a statement of the form: ^object = location in which the carat character (^, also called a pointer in this context) indicates where to find the object. In a detached label, the location denotes the name of the file containing the object, along with the starting record or byte number, if there is more than one object in the file. For example: ^HEADER = ("F01.DAT",1) ^IMAGE = ("F01.DAT",1025 ) indicates that the IMAGE object begins at byte 1025 of the file F01.DAT, in the same directory as the detached label file. 4. File Naming Convention Data products provided by the SPICAM team will have the following name: SPIM_YYT_nnnnnAnn_M_vv.DAT where YY 2 letters describing the SPICAM data level (eg. 0A, 1A, 1B, ...) T 1 letter describing the type of data collected (U for UV and R for IR) nnnnn 5 digits for the orbit number Ann sequence number indicating the order that data were collected for the nnnnn orbit (A01, A02,...). M 1 letter describing the type operation mode (eg. E:STAR, S:SUN, L:LIMB, N:NADIR, Y:SKY, P:PHOBOS, D:DEIMOS, T:CALIBRATION) vv version number of the file Associated detached label files and browse files follow the same filenaming convention with the .LBL and _QL.PNG extension respectively. Geometry files provided by the SPICAM team will have the following name: SPIM_YYT_nnnnnAnn_M_GO_vv.TXT where vv version number of the geometry file 4. Applicable Software TBD 5. Volume Contents Files on the SPICAM LEVEL 0A archive volume are organized into a series of subdirectories below the top-level directory. See the xxxxINFO.TXT files in each directory for specific information on the files in the directory. The following table shows the generalized structure and contents of the SPICAM archive volumes. Top-level ROOT | |- AAREADME.TXT The file you are reading | |- ERRATA.TXT Description of known anomalies and errors present | on the volume. |- AAREADME.LBL PDS detached label describing AAREADME.TXT | |- VOLDESC.CAT Description of the contents of the volume in a PDS | format for the PDS Catalog | | |- [DATA] A directory containing the data + associated label files | | | | | |-[MARS] A directory containing MEX SPI level 0A UV data | | | collected during the MARS first extended mission phase | | | | | |-[MTP043_04685_04784] | | | | | | | |-- {file(s) *DAT, *.LBL} | | | | | ... | |- [CATALOG] A directory containing information about the data set | | | |- CATINFO.TXT Description of files in this directory | | | |- DATASET.CAT Description of the MEXSPI_1001 data set | | set during the cruise phase | | | |- RELEASE.CAT Release object of the MEXSPI_1001 data set | | | | | |- MISSION.CAT Description of the Mars Express mission | | | |- INSTHOST.CAT Description of the Mars Express spacecraft | | | |- INST.CAT Description of the MEX SPICAM instrument | | | |- PERS.CAT Listing of the people involved in the | | production of this archive volume | |- REFS.CAT List of pertinent references. | | | |- SWINV.CAT Description of the software included on the | | volume. | | | |- TARGET.CAT Description of the target observed by the | | MEX SPICAM instrument | |- [INDEX] A directory containing an index of data files. | | | |- INDXINFO.TXT Description of files in this directory. | | | | | |- INDEX.TAB Index of level 0A UV data files in | | the DATA directory | |- INDEX.LBL PDS detached label describing the | | the corresponding *.TAB file | | | |- BROWSE_INDEX.TAB Index of level 0A UV browse files in | | the BROWSE directory | |- BROWSE_INDEX.LBL PDS detached label describing the | | corresponding *.TAB file | | | |- GEOMETRY_INDEX.TAB Index of geometry files in the | | GEOMETRY directory | |- GEOMETRY_INDEX.LBL PDS detached label describing | | the corresponding *.TAB file | | | |- GEO_MARS.TAB Geometry index file providing geometry | | and position information to locate the | | data within the data set | |- GEO_MARS.LBL PDS detached label describing the | | GEO_MARS.TAB file | | |- [BROWSE] A directory containing reduced-size, easily viewed versions | | of data products. | | | |- BROWINFO.TXT Description of files in this directory. | | | | | |-[MARS] A directory containing browse images of MEX SPI level | | | 0A UV data collected during the MARS first extended | | | mission phase. | | | | | | | | |-[MTP043_04685_04784] | | | | | | | |-- {file(s) *PNG, *.LBL} | | | | | ... | |- [GEOMETRY] A directory containing geometry files associated to the | | data products. | | | |- GEOMINFO.TXT Description of files in this directory. | | | | | |-[MARS] A directory containing geometry of MEX SPI level | | | 0A UV data collected during the MARS first extended | | | mission phase. | | | | | | | | |-[MTP043_04685_04784] | | | | | | | |-- {file(s) *TXT, *.LBL} | | | | | ... | | | | |- [DOCUMENT] A directory containing information documents. | | | |- DOCINFO.TXT Description of files in this directory. | | | |- SA_MEX_ARCH_003_xx.PDF The SPICAM EAICD in PDF format | |- SA_MEX_ARCH_003_xx.ASC The SPICAM EAICD in ASC format | | | |- SA_MEX_ARCH_003_xx.LBL PDS detached label that describes | | SA_MEX_ARCH_003_xx.PDF and | | SA_MEX_ARCH_003_xx.ASC | | | | | |- SPICAM_UVDATAFILE_DESC.TXT ASCII file describing the contents | | of the data files which are delivered in | | the Spicam data set. | | | |- SPICAM_UVDATAFILE_DESC.LBL PDS detached label that describes | | SPICAM_UVDATAFILE_DESC.TXT | | | |- SPICAM_UVCALIB_DESC.TXT ASCII file describing the calibration | | of the Spicam UV data which are delivered | | in the Spicam UV dataset. | |- SPICAM_UVCALIB_DESC.LBL PDS detached label that describes | | SPICAM_UVCALIB_DESC.TXT | | | |- SPICAM_GEOMETRY_DESC.TXT ASCII file describing the contents of | | the geometry files which are delivered | | in the Spicam data set. | |- SPICAM_GEOMETRY_DESC.LBL PDS detached label that describes | | SPICAM_GEOMETRY_DESC.TXT. | | | |-SPICAM_UVMODE_DESC.TXT- ASCII file describing the different | | operating modes of the UV SPICAM | | spectrometer. | | | |-MEX_ORIENTATION_DESC.TXT - ASCII file informing on the usage of | | the spacecraft orientation on Mars Express. | | | |-MEX_ORIENTATION_DESC.LBL - PDS detached label that describes | | MEX_ORIENTATION_DESC.TXT. | | | |-DATA_QUALITY_DESC.TXT - ASCII file describing the data quality | | which is associated with a particular | | data_quality_id value. | | | |-DATA_QUALITY_DESC.LBL - PDS detached label that describes | | DATA_QUALITY_DESC.TXT | |- [CALIB] A directory containing information documents. | | | |-SPICAM_UVSEFF.DAT - SPICAM UV efficient surface as a | | function of wavelength, needed | | to calibrate SPICAM UV raw data. | | | |-SPICAM_UVSEFF.LBL - PDS detached label that describes | | SPICAM_UVSEFF.DAT | |- [SOFTWARE] A directory containing IDL routines to read UV data | | | |-SOFTINFO.TXT - Description of files in this directory. | | | |-SPICAM_READPDS.ZIP - A ZIP file containing the IDL routines | | needed to read the SPICAM UV data files | | | |-SPICAM_READPDS.LBL - PDS detached label that describes | | SPICAM_READPDS.ZIP 6. Whom to Contact for Information For questions concerning this data set: Contact FRANCK MONTMESSIN(Principal Investigator) or AURELIE REBERAC (Archive Manager) See personnel information in PERS.CAT catalog. 7. Cognizant Persons SPICAM data were provided by F. Montmessin, SPICAM Principal Investigator, with assistance from A. Reberac and G.Lacombe, from LATMOS,IPSL/CNRS, FRANCE.