PDS_VERSION_ID = PDS3 LABEL_REVISION_NOTE = "P. Christensen, 1999-02-28; K. Murray, 2001-04-01; K. Murray, 2002-01-01; K. Murray, 2003-10-01; S. Slavney, 2005-05-05; K. Murray, 2006-04-30" RECORD_TYPE = STREAM OBJECT = DATA_SET DATA_SET_ID = "MGS-M-TES-3-TSDR-V2.0" OBJECT = DATA_SET_MISSION MISSION_NAME = "MARS GLOBAL SURVEYOR" END_OBJECT = DATA_SET_MISSION OBJECT = DATA_SET_INFORMATION DATA_SET_NAME = "MGS M THERMAL EMISSION SPECTROMETER 3 TSDR V2.0" DATA_SET_COLLECTION_MEMBER_FLG = "N" DATA_OBJECT_TYPE = "TABLE" START_TIME = 1998-04-02T10:04:56 STOP_TIME = "UNK" DATA_SET_RELEASE_DATE = 2002-01-01 PRODUCER_FULL_NAME = "PHILIP R. CHRISTENSEN" DETAILED_CATALOG_FLAG = "N" ARCHIVE_STATUS = "ARCHIVED" CITATION_DESC = "Christensen, P.R., MGS M THERMAL EMSSION SPECTROMETER 3 TSDR V2.0, MGS-M-TES-3-TSDR-V2.0, NASA Planetary Data System, 1998." ABSTRACT_DESC = "The TES-TSDR data product contains the raw and calibrated thermal IR radiance spectra, the visual and thermal bolometric radiance measurements, and several atmospheric and surface properties derived from this data. Also included are the parameters that describe each observations, some downlinked diagnostic information, and the pointing and positional information derived from the project's SPICE kernels." DATA_SET_TERSE_DESC = "MGS TES raw and calibrated radiance" DATA_SET_DESC = " Data Set Overview ================= The TES-TSDR data product contains the raw and calibrated thermal IR radiance spectra, the visual and thermal bolometric radiance measurements, and several atmospheric and surface properties derived from this data. Also included are the parameters that describe each observations, some downlinked diagnostic information, and the pointing and positional information derived from the project's SPICE kernels. The TES data is divided into 10 tables (OBS, RAD, BOL, GEO, POS, TLM, IFG, CMP, ATM, LMB). Each table is stored in a separate file as a PDS TABLE structure, using fixed-length binary records, with extensions to handle the variable length spectra. Every record is stored with the spacecraft time, and related records can be retrieved from each table using time as a common key. In some tables, up to 6 records can be stored for a given time, one for each detector. In these cases the records also include a field named 'detector', which with the time field, uniquely identifies the record. The data products on this volume may be reprocessed at the end of the mission. Modification History ==================== Version 1 data volumes include MGST_0001 through MGST_0226, released between June 1999 and October 2001. These volumes contain TES data collected August 1997 through March 2001. The version 2 data set release began January 2002; version 2 supersedes version 1. The version 2 release is necessitated by several improvements that the TES Team has made to the version 1 data set throughout the mapping phase of the MGS mission. The most significant of these improvements include: MGST_0100 (Oct 1999) - classification and quality fields added to the OBS and RAD tables; MGST_0162 (Oct 2000) - thermal inertia fields added to the BOL and RAD tables; MGST_0188 (Apr 2001) - ATM table replaces SRF table and is filled with atmospheric products; MGST_0213 (Oct 2001) - geometry and position fields are calculated using new calibration software (V003a). Since previously released volumes were not re-released with each improvement, incompatability problems developed between data volumes released at different times. The version 2 data release incorporates all of the above changes and is a uniform collection of all available TES mapping data. Individual data tables within the version 2 MGST data set may have been released with further revisions. These additional revisions primarily correct processing anomalies discovered after the version 2 release of the volume; all revisions are discussed in detail in the ERRATA.TXT file. The corrected data tables replace any previously released versions. Volume table revisions update only the data values; the format and orbital coverage of the table remains unchanged and compatible with all other MGST dataset version 2 volumes. Data ==== Each table is stored in a PDS TABLE structure using fixed-length binary records sorted time-sequentially. Each table file is prefixed with an ASCII header that describes the contents and format of the table, and a pointer that indicates where the binary table data starts. The description identifies each column in the table, detailing its name, starting position (in bytes), size (in bytes), data type, description and scaling factors if applicable. In some cases the column being described is a fixed-length array of related, homogeneous values, in which case the column description also includes the number of items in the array, and the size of each item. Four tables (RAD, ATM, CMP, IFG) store variable length data. These variable length records are stored in a file separate from the fixed length records, and are addressed from the fixed-length records with a pointer column. Pointer columns contain the position of the variable length data, in bytes, from the start of the file it is in. Fixed-length records are stored in files with a .DAT extension. The variable length records that are referenced by an individual .DAT file are found in a file with the same name, but with a .VAR extension. Coordinate System ================= Mars areocentric, west positive; Mars body constants obtained from the IAU-1994 report Software ======== The TES project has produced a software tool that not only reads the PDS table and variable length records, but is also capable of joining the related records among multiple tables. This piece of software is called 'vanilla', and is provided on this cd. 'Vanilla' is also available via anonymous ftp from ftp://east.la.asu.edu/pub/software/vanilla/vanilla.tar.Z. The vanilla program works on UNIX machines with integers in MSB_INTEGER format and on PC platforms. Media/Format ============ CD-ROM " CONFIDENCE_LEVEL_NOTE = " Please refer to the MGS Thermal Emission Spectrometer Data Processing User's Guide (CHRISTENSEN1999), which is included in this data set archive. " END_OBJECT = DATA_SET_INFORMATION OBJECT = DATA_SET_REFERENCE_INFORMATION REFERENCE_KEY_ID = "CHRISTENSEN1999" END_OBJECT = DATA_SET_REFERENCE_INFORMATION OBJECT = DATA_SET_TARGET TARGET_NAME = MARS END_OBJECT = DATA_SET_TARGET OBJECT = DATA_SET_HOST INSTRUMENT_HOST_ID = "MGS" INSTRUMENT_ID = "TES" END_OBJECT = DATA_SET_HOST END_OBJECT = DATA_SET END