PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 80 OBJECT = TEXT INTERCHANGE_FORMAT = ASCII PUBLICATION_DATE = 1996-06-27 NOTE = "N/A" END_OBJECT = TEXT END Volume MG_2401 Magellan Venus Radio Occultation Atmospheric Profiles Data Set Archive AAREADME.TXT 27 June 1996 S.W. Lee Laboratory for Atmospheric and Space Physics University of Colorado ================================================================= INTRODUCTION ================================================================= This compact disc contains archival data produced from the Magellan mission to Venus. The data sets were derived from dual-frequency ingress radio occultation experiments using the Magellan orbiter on three consecutive orbits (#3212 - #3214) on October 5 and 6, 1991. This data collection includes vertical profiles of refractivity, temperature, pressure and density in the neutral Venus atmosphere, and vertical profiles of 13-cm and 3.6-cm absorptivity and abundance of sulfuric acid vapor (H2SO4). ================================================================= VOLUME INFORMATION ================================================================= This disc contains two data sets as described below. Each data set is contained in one file, internally ordered by wavelength, orbit, and altitude. The data sets are: (1) MGN_RTPD - This data set contains vertical profiles of refractivity, temperature, pressure and density in the neutral Venus atmosphere. (2) MGN_ABS - This data set contains vertical profiles of 13-cm and 3.6-cm absorptivity and abundance of sulfuric acid vapor (H2SO4) in the neutral Venus atmosphere. 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 included data sets | | | |- CATINFO.TXT Description of files in this directory. | | | |- COLLECT.CAT Description of this data set collection. | | | |- MISSION.CAT Description of the Magellan mission. | | | |- MGN_HOST.CAT Description of the Magellan spacecraft. | | | |- DSN_HOST.CAT Description of the Deep Space Network. | | | |- MGN_RSS.CAT Description of the Magellan radio | | science subsystem used in the radio | | occultation experiments. | | | |- DSN_RSS.CAT Description of the Deep Space Network | | radio science subsystem used in the radio | | occultation experiments. | | | |- MGN_RTPD.CAT Descriptions of the data sets. | |- MGN_ABS.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. | |- MGN_ABS.DAT The MGN_ABS data file. | |- MGN_ABS.LBL The PDS label describing MGN_ABS.DAT. | |- MGN_RTPD.DAT The MGN_RTPD data file. | `- MGN_RTPD.LBL The PDS label describing MGN_RTPD.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. The data were provided by Jon Jenkins of the SETI Institute. 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