PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT INTERCHANGE_FORMAT = ASCII PUBLICATION_DATE = 2001-09-04 NOTE = "N/A" END_OBJECT = TEXT END MGS Solar Conjunction Raw Data Archive Mars Mapping Phase (MGS-SUN-RSS-1-ROCC-V1.0) AAREADME.TXT 4 Septmber 2001 Elias Barbinis Jet Propulsion Laboratory ============================================================================== INTRODUCTION ============================================================================== This compact disc contains archival raw, and ancillary/supporting radio science data for the Solar Conjunction in 2000 acquired during the Mars Mapping (MAP) phase of the Mars Global Surveyor (MGS) mission. These data are contained in two volumes (CDs). The radio observations were carried out using the MGS spacecraft and Earth-based receiving stations of the NASA Deep Space Network (DSN). The table below lists the two volumes and (very briefly) their respective contents. VOLUME_ID Start Date End Date Notes --------- ------------------- ------------------- ----------------------- MGRS_0001 2000-06-28 (00/180) 2000-07-01 (00/183) Solar Conjunction on 00/183 MGRS_0002 2000-07-02 (00/184) 2000-07-05 (00/187) ============================================================================== VOLUME SET INFORMATION ============================================================================== Each of the two volumes has the structure illustrated in the diagram below. The primary data types for these volumes are the DSN Original Data Record (ODR), and the Archival Tracking Data File (ATDF or TDF). ODR files are stored in the ODR directory. The ATDF are considered backup data to the ODR; those files are stored in the TDF directory. The primary data files are accompanied by ancillary files. There are seven ancillary file types that are organized into directories of their own. These include the Channelized DSN Monitor Data Files (MCH Directory), the Monitor Channel Tables, (MCT Directory), the Sequence of Events file (SOE directory), the Spacecraft and Planetary Kernel file (SPK directory), the DSN Weather files (WEA directory), the Ionosphere Media Calibration files (ION directory), and the Troposphere Media Calibration files (TRO directory). The CATALOG directory contains summary information on the MGS mission, the spacecraft, radio science instrumentation, and the data set. These files are structured (to facilitate machine handling) but are also intended to be readable. The diagram below shows the organization of each volume, starting from the root of the compact disc. root | |- AAREADME.TXT |- ERRATA.TXT |- VOLDESC.CAT | |- CATALOG | | | |- CATINFO.TXT PDS catalog files | |- MISSION.CAT for mission, host, instrument, | |- INSTHOST.CAT references, personnel, data set | |- INST.CAT and target | |- REF.CAT | |- PERSON.CAT | |- DATASET.CAT | `- TARGET.CAT | |- DOCUMENT | | | |- DOCINFO.TXT Overview of directory | |- TK_FTP.TXT Ephemeris documentation | |- TK_DESCR.TXT | |- TK_INSTL.TXT | |- TRK_2_21.TXT TDF SIS document | `- ... | |- INDEX | | | |- INDXINFO.TXT Overview of directory | |- INDEX.LBL Label to INDEX.TAB | |- INDEX.TAB List of data file contents, this volume | |- CUMINDEX.LBL Label to CUMINDEX.TAB | `- CUMINDEX.TAB List of data file contents, all volumes | |- ION |- MCH |- MCT |- ODR |- SOE |- SPK |- TDF |- TRO `- WEA ============================================================================== ERRATA ============================================================================== A cumulative list of errors and changes is maintained in the file ERRATA.TXT. ============================================================================== DISC FORMAT ============================================================================== The disc is organized according to the PDS standard for "one data set, many volumes." This file (AAREADME.TXT), a PDS volume object definition (VOLDESC.CAT), and the listing of errors and changes (ERRATA.TXT) are included at the root level. The following directories of descriptive material are also at the root level: CATALOG contains descriptive files for cataloging the data on this disc. DOCUMENT contains a plain text Software Interface Specification (SIS) for data types (if available), directions on how to obtain NAIF SPICE software, and other documentation. INDEX contains index information on each of the data files included in this disc; it also includes a cumulative index to all files in this volume set. The remaining directories at the root level contain data files and detached PDS labels. ============================================================================== FILE FORMAT ============================================================================== All data files on the disc are accompanied by detached PDS labels, which describe their contents. PDS TEXT objects have attached labels. Detached labels have the same file name as the data file except that the label name has the suffix "LBL". Detached PDS labels for multi-file documents have distinctive file names ending with ".LBL". Detailed documentation on file structure is available for some file types in Software Interface Specifications in the DOCUMENT directory. ODR and TDF files have full PDS labels which describe format and content completely. For other file types, where no electronic version of the SIS was available, the PDS label provides a reference to a hard copy document. See the DESCRIPTION keyword in each PDS label. Text files (*.TXT file names) and catalog files (*.CAT file names) are stream files. ============================================================================== SOFTWARE ============================================================================== Software for parsing 8- and 12-bit samples from ODR data records has been developed at several institutions to support NASA flight projects. Because parsing must be done at the bit level and the code is usually written for a narrow platform-specific application, no software has been included as part of this archival product. ============================================================================== DISCLAIMER ============================================================================== Although considerable care has gone into making this volume set, 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 below. ============================================================================== COGNIZANT PERSONNEL ============================================================================== The person most directly responsible for construction and release of this volume set is Elias Barbinis, Member of the Radio Science Systems Group at the Jet Propulsion Laboratory. Although many people contributed to the volume set, any faults in the product are his alone. Elias Barbinis Jet Propulsion Laboratory 4800 Oak Grove Drive M/S: 264-860 Pasadena, CA 91109-8099 Tel: 818-393-0661 FAX: 818-393-9282 Elias.Barbinis@jpl.nasa.gov Richard Woo Principal Investigator for Solar Conjunction Jet Propulsion Laboratory 4800 Oak Grove Drive M/S: 238-725 Pasadena, CA 91109-8099 Tel: 818-354-3945 FAX: 818-354-2825 Richard.Woo@jpl.nasa.gov David D. Morabito Investigator for Solar Conjunction Jet Propulsion Laboratory 4800 Oak Grove Drive M/S: 161-260 Pasadena, CA 91109-8099 Tel: 818-354-2424 FAX: 818-393-4643 David.D.Morabito@jpl.nasa.gov Richard A. Simpson PDS Radio Science Adviser Center for Radar Astronomy Packard Building - Room 332 Stanford University Stanford, CA 94305-9515 Tel: 650-723-3525 FAX: 650-723-9251 rsimpson@magellan.stanford.edu ============================================================================== ACRONYMS AND ABBREVIATIONS ============================================================================== ATDF Archival Tracking Data File (same as TDF) CD Compact Disc DSN Deep Space Network ION Ionosphere Calibration file (file and/or directory) MCH DSN Monitor - Channelized data (file and/or directory) MCT Monitor Channel Table MGS Mars Global Surveyor NASA National Aeronautics and Space Administration ODR Original Data Record (file and/or directory) PDS Planetary Data System RSS Radio Science Subsystem SOE Sequence of Operations (file and/or directory) SPK Spacecraft and Planet Kernel (file and/or directory) TDF Tracking Data File (file and/or directory) TRO Troposphere Calibration File (file and/or directory) WEA DSN Weather (file and/or directory)