PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 80 TARGET_NAME = VENUS RELEASE_ID = 0001 REVISION_ID = 0000 OBJECT = TEXT PUBLICATION_DATE = 2013-05-31 NOTE = "VENUS Express Archive DE_DLR_PF_VEXVMC_0001" END_OBJECT = TEXT END 1. Introduction This dataset contains images from the Venus Monitoring Camera (VMC) onboard the VenusExpress spacecraft. It also contains documentation which describe the images. The VMC images archived in this dataset are the exact products released by the VMC team. Supporting documentation and label files confirm to the Planetary Data System (PDS) Standards, Version 3.0, Jet Propulsion Laboratory (JPL) document JPL D-7669. Additional information about the VMC experiment, including the acquisition, processing, and quality of the VMC data, can be found in documents that are available from ESA's Planetary Science Archive (PSA) at ESTEC, Nordwijk, Netherlands. 2. Disk Format This section is not applicable since the data are stored only electronically. 3. File Formats All document files and detached label files contain 80-byte fixed- length records, with a carriage return character (ASCII 13) in the 79th byte and a line feed character (ASCII 10) in the 80th byte. This allows the files to be read by the MacOS, DOS, Unix, and VMS operating systems. All tabular files are also described by PDS labels, either embedded at the beginning of the file or detached. If detached, the PDS label file has the same name as the data file it describes, with the extension .LBL; for example, the file INDEX.TAB is accompanied by the detached label file INDEX.LBL in the same directory. Tabular files are formatted so that they may be read directly into many database management systems on various computers. All fields are separated by commas, and character fields are enclosed in double quotation marks ("). Character fields are left justified, and numeric fields are right justified. The "start byte" and "bytes" values listed in the labels do not include the commas between fields or the quotation marks surrounding character fields. The records are of fixed length, and the last two bytes of each record contain the ASCII carriage return and line feed characters. This allows a table to be treated as a fixed length record file on computers that support this file type and as a normal text file on other computers. PDS labels are object-oriented. The object to which the label refers (e.g. IMAGE, TABLE, etc.) is denoted by a statement of the form ^object = location in which the carat character (^, also called a pointer in this context) indicates that the object starts at the given location. In an embedded label, the location is an integer representing the starting record number of the object (the first record in the file is record 1). 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. For example, ^IMAGE_HEADER = ("F02.IMG",1) ^IMAGE = ("F02.IMG",3) indicates that the IMAGE object begins at record 3 of the file F02.IMG, in the same directory as the detached label file. Below is a list of the possible formats for the ^object definition. ^object = n ^object = n ^object = ("filename.ext") ^object = ("filename.ext",n) ^object = ("[dirlist]filename.ext",n) ^object = ("filename.ext",n) ^object = ("[dirlist]filename.ext",n) where n is the starting record or byte number of the object, counting from the beginning of the file (record 1, byte 1). indicates that the number given is in units of bytes. filename is the upper-case file name, before the decimal point. ext is the upper-case file name, after the decimal point. dirlist is a period-delimited path-list of parent directories, in upper case, that specifies the object file directory. The list begins on directory level below the root directory of the CD-ROM. '[dirlist]' may be omitted when the object being described is located either in the same directory as the detached label or in a sub-directory named 'LABEL', located one level below the CD-ROM root directory. FILENAMING FOR IMAGE DATA The following structure of filenames was used VOOOO_MMMM_DDL.IMG - camera id V - orbit number OOOO - image number in one orbit MMMM - detector id DD (can be UV,VI,I1,I2) - level (2) L examples: V1234_0023_VI1.IMG V1234_0323_UV2.IMG 4. Volume Contents The files on this volumes are organized in one top-level directory with several subdirectories. The following table shows the structure and content of these directories. In the table, directory names are enclosed in square brackets ([]), upper-case letters indicate an actual directory or file name, and lower-case letters indicate the general form of a set of directory or file names. FILE CONTENTS Top-level directory | |-AAREADME.TXT This text file. | |-VOLDESC.CAT A description of the contents of this | volume in a PDS format readable by both | human and computers. | |-ERRATA.TXT This file summarizes known errors. | |- [BROWSE] This directory contains reduced size | | versions of all images in the DATA directory. | | | |- BROWINFO.TXT A description of the contents of this | | directory. | | | |-[ORBIT NUMBER] Sub-divided orbit number | | directories. | | | |-----BROWSE.JPG Browse images in .JPG format | | | |-----BROWSE.LBL PDS detached labels that describe the | Browse images | |- [CATALOG] A directory containing files that provide | | a top-level understanding of the mission, | | spacecraft, instruments, and data sets. | | | |-CATINFO.TXT A description of the contents of this | | directory. | | | |-DATASET.CAT VMC data set information for the PDS | | catalog. | | | |-INST.CAT VMC instrument information for the PDS | | catalog. | | | |-INSTHOST.CAT VMC instrument host (i.e.,spacecraft) | | information for the PDS catalog. | | | |-MISSION.CAT VMC mission information for the PDS | | catalog. | | | |-PERSON.CAT Personnel information for the PDS catalog | | (Team and PDS personnel responsible for | | generating the archive). | | | |-REF.CAT References mentioned in other *.CAT files. | | | |-RELEASE.CAT Catalog file for the different releases | | | |-TARGET.CAT Catalog of targets | | | |-[DATA] A directory containing VEX/VMC instrument | | image data files with attached dual | |-[ORBIT NUMBER] PDS/VICAR labels. Sub-divided orbit number | directories. | | |-[DOCUMENT] A directory that contains documentation | | to help the user understand and use the | | archive data. | | | |-DOCINFO.TXT A description of the contents of this | | directory. | | | |-GEOMETRY_CUBE_DESC.LBL The label for GEOMETRY_CUBE_DESC.TXT | | | |-GEOMETRY_CUBE_DESC.TXT Description of the Geometry Cubes | | | |-INSTRUMENT_DESC.LBL The label for the INSTRUMENT_DESC.TXT. | | | |-INSTRUMENT_DESC.TXT Instrument description. | | | |-OBSERVATION_TYPE_DESC.LBL The label for the | | OBSERVATION_TYPE_DESC.TXT. | | | |-OBSERVATION_TYPE_DESC.TXT Description of the different observation | | types. | | | |-VEX_ORIENTATION_DESC.LBL The label for the | | VEX_ORIENTATION_DESC.TXT. | | | |-VEX_ORIENTATION_DESC.TXT Description of the VEX orientation modes. | | | |-VEX_POINTING_MODE_DESC.LBL The label for the | | VEX_POINTING_MODE_DESC.TXT. | | | |-VEX_POINTING_MODE_DESC.TXT Description of the VEX pointing modes. | | | |-VEX_SCIENCE_CASE_ID_DESC.LBL The label for the | | VEX_SCIENCE_CASE_ID_DESC.TXT. | | | |-VEX_SCIENCE_CASE_ID_DESC.TXT Description of the VEX science cases. | | | |-VICAR2.LBL The label for the VICAR2.TXT. | | | |-VICAR2.TXT Description of the VICAR label. | | | |-VMC_ANOMALOUS_FEATURES.LBL The label for the | | VMC_ANOMALOUS_FEATURES_REPORT.PDF | | | |-VMC_ANOMALOUS_FEATURES.PDF Description of the VMC anomalous | | feautures. | | | |-VMC_CALIBRATION_REPORT.LBL The label for the | | VMC_CALIBRATION_REPORT.PDF | | | |-VMC_CALIBRATION_REPORT.PDF VMC calibration report | | | |-VMC_COMMISiSIONING_REPORT.LBL The label for the | | VMC_COMMISSIONING_REPORT.PDF | | | |-VMC_COMMISiSIONING_REPORT.PDF VMC Commissioning report | | | |-VMC_INFLIGHT_CALIBRATION.LBL The label for the | | VMC_INFLIGHT_CALIBRATION.TXT | | | |-VMC_INFLIGHT_CALIBRATION.TXT VMC inflight calibration report | | | |-VMC_EAICD.LBL The label for the Experimenter to Archive ICD. | | | |-VMC_EAICD.PDF The Adobe PDF file of the experimenter to | | Archive ICD | | | |-VMC_EAICD.TXT The ASCII version of the experimenter to | | Archive ICD | | | |-VMC_ESA_SP.LBL The label for the VMC Instrument Description | | published in the ESA SP-1295 | | | |-VMC_ESA_SP.PDF The Adobe PDF file of the ESA SP-1295 | | | |-VMC_LABEL.LBL The label for VMC_LABEL.PDF | | | |-VMC_LABEL.PDF Description of the keywords in the PDS label. | | | |-VMC_NATURE.PDF VMC Nature article summarizing the first | | scientific results. | | | |-VMC_NATURE.LBL The label for VMC_NATURE.PDF | | |-ERRATA.TXT Optional file summarizing the known errors. | | |-[GEOMETRY] A directory containing Geometry Cubes for each | | image in the DATA directory with attached dual | |-[ORBIT NUMBER] PDS/VICAR labels. Sub-divided orbit number | directories. | | |-[INDEX] A directory containing index files which | | describe products published so far or on | | this volume. | | | |-BROWSE_INDEX.LBL A PDS detached label that describes | | BROWSE_INDEX.TAB | | | |-BROWSE_INDEX.TAB A table listing all browse files on this | | volume. | | | |-GEO_VENUS.LBL A PDS detached label that describes | | GEO_VENUS.TAB | | | |-GEO_VENUS.TAB The geometrical index file | | | |-INDEX.LBL A PDS detached label that describes | | INDEX.TAB. | | | |-INDEX.TAB A table listing all data products on this | | volume. | | | |-INDEXINFO.TXT A description of the contents of this | directory. | | |-VOLDESC.CAT Volume Desription file 5. Recommended CD-ROM Drives and Driver Software This section is not applicable since the data are stored only electronically. 6. Errata and Disclaimer A cumulative list of anomalies and errors will be maintained in the file ERRATA.TXT at the root directory of this volume. This file will not be available if no errors are known. Although considerable care has gone into making this volume, errors are both possible and likely. Users of the data are advised to exercise the same caution as they would when dealing with any other unknown data set. Reports of errors or difficulties would be appreciated. Please contact one of the persons listed herein. 7. Whom to Contact for Information Planteray Science Archive Help desk email: psahelp@rssd.esa.int