PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 80 OBJECT = TEXT INTERCHANGE_FORMAT = ASCII PUBLICATION_DATE = 1995-07-10 NOTE = "N/A" END_OBJECT = TEXT END Volume VL_1001 Viking Lander Meteorology and Atmospheric Opacity Data Set Archive AAREADME.TXT 10 July 1995 S.W. Lee Laboratory for Atmospheric and Space Physics University of Colorado ================================================================= INTRODUCTION ================================================================= This compact disc contains archival data produced from the Viking Lander missions to Mars. The meteorology data sets were produced from the Lander Meteorology Experiment (MET). The atmospheric opacity data set was derived from the Lander Camera Subsystem (LCS). ================================================================= VOLUME INFORMATION ================================================================= This disc contains five data sets as described below. Each data set is contained in one file, internally ordered by spacecraft and time. The data sets are: (1) VL_P - This data set contains point by point pressure data from the Viking Lander Meteorology Experiment for the duration of the Lander 1 and 2 missions. (2) VL_AVEP - This data set contains summary pressure data from the Viking Lander Meteorology Experiment for the duration of the Lander 1 and 2 missions. (3) VL_MBIN - This dataset contains Viking Lander Meteorology Experiment data which have been binned and splined. Mean values of wind velocity, pressure and temperature are caluclated for 25 bins (equal duration) per day. Data are available for Viking Lander 1 sols 1 - 350. (4) VL_TBIN - This dataset contains Viking Lander Meteorology Experiment data which have been binned and splined. Mean values of wind velocity, pressure and temperature are caluclated for 25 bins (equal duration) per day. Data are available for Viking Lander 1 sols 1 - 45 and Viking Lander 2 sols 1 - 1050. (5) VL_OPAC - Viking Lander camera images of the sun were used to compute atmospheric optical depth at the landing sites for a period of about 1.3 martian years. There are 1044 optical depth determinations with observation times and error estimates. This volume follows the structure outlined below: root | |- AAREADME.TXT The file you are reading. | |- ERRATA.TXT Description of known anomalies and | errors present on this volume. | |- VOLDESC.CAT A description of the contents of this | CD_ROM volume in a format readable by | both humans and computers. | |- [CATALOG] A directory containing information | | about the Lander data sets | | | |- CATINFO.TXT Description of files in this directory. | | | |- MISSION.CAT Description of the Viking Lander | | missions. | | | |- VL1HOST.CAT Description of the Viking Lander 1 | |- VL2HOST.CAT and 2 spacecraft. | | | |- VL1INST.CAT Description of the Lander | |- VL2INST.CAT Meteorology Experiment instruments. | | | |- VL_P.CAT Descriptions of the data sets. | |- VL_AVEP.CAT | |- VL_MBIN.CAT | |- VL_TBIN.CAT | |- VL_OPAC.CAT | | | |- PERS.CAT A listing of the people involved in the | | production of these data sets and | | this CD-ROM. | | | |- REFS.CAT A list of pertinent references. | |- [DATA] A directory containing the data files | and PDS labels describing the contents | of those files. | |- VL_P.DAT The VL_P data file. | |- VL_P.LBL The PDS label describing VL_P.DAT. | |- VL_AVEP.DAT The VL_AVEP data file. | |- VL_AVEP.LBL The PDS label describing VL_AVEP.DAT. | |- VL_MBIN.DAT The VL_MBIN data file. | |- VL_MBIN.LBL The PDS label describing VL_MBIN.DAT. | |- VL_TBIN.DAT The VL_TBIN data file. | |- VL_TBIN.LBL The PDS label describing VL_TBIN.DAT. | |- VL_OPAC.DAT The VL_OPAC data file. | |- VL_OPAC.LBL The PDS label describing VL_OPAC.DAT. ================================================================= DISC FORMAT ================================================================= This disk has been formatted so that a variety of computer systems (e.g. IBM PC, Macintosh, Sun, VAX) may access the data. Specifically, the disk is formatted according to the ISO 9660 level 1 Interchange Standard. For further information, refer to the ISO 9660 Standard Document: RF# ISO 9660-1988, 15 April 1988. ================================================================= FILE FORMAT ================================================================= All data files on this disc are accompanied by detached PDS labels, which describe their contents. PDS TEXT objects include attached labels. All PDS labels include an SFDU label in the first record. Labels have the same file name as the primary data file but have a suffix ".LBL" appended. The data files were extracted from the Planetary Atmospheres Node Data Analysis System (PANDA) at the University of Colorado. Each file is ASCII, with the number of records and record structure documented in the associated PDS labels. ================================================================= ACKNOWLEDGMENTS ================================================================= This archiving project was initiated by Steve Lee of the Planetary Data System (PDS) Atmospheres (ATM) Discipline Node (DN) at the University of Colorado. Assistance in preparing the data set and associated documentation was provided by Sally Lasater and Andrew Weir at the University of Colorado. The archival products which result from this activity will be delivered to the PDS ATM DN. Assistance in developing the structure of this volume and format of the catalog files was provided principally by Ron Joyner of PDS at JPL. ================================================================= 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. ================================================================= WHOM TO CONTACT FOR INFORMATION ================================================================= For questions concerning this volume or the data sets and documentation contained herein, contact: Steven W. Lee Laboratory for Atmospheric and Space Physics Campus Box 392 University of Colorado Boulder, CO 80309-0392 Phone: 303-492-5348 Email: lee@syrtis.colorado.edu For questions concerning how to read this CD_ROM or about PDS standards, contact: Jason Hyon MS 525-389 Jet Propulsion Laboratory 4800 Oak Grove Drive Pasadena, CA 91109 Phone: 818-306-6054 Email: jhyon@jplpds.jpl.nasa.gov