PDS_VERSION_ID        = PDS3
RECORD_TYPE           = STREAM
OBJECT                = TEXT
  PUBLICATION_DATE    = 2013-03-15
  NOTE                = "Description of the CATALOG directory contents
                         for the GRS CDR/RDR/DAP data archive volume."
END_OBJECT            = TEXT
END

This subdirectory contains the catalog object files for the volume. The 
following files are included in the catalog subdirectory.

CATINFO.TXT: Identifies and describes of function of each file in the
catalog directory (this file).

CDR_RDR_DS.CAT: Describes the general content of the CDR and RDR dataset and 
includes information about the duration of the mission and the person or 
group responsible for producing the data.

DAP_DS.CAT: Describes the general content of the DAP dataset and includes 
information about the duration of the mission and the person or group 
responsible for producing the data.

DSMAP.CAT: Describes the DAP dataset simple cylindrical map projection.

INSTRUMENT_HOST.CAT: Describes the MESSENGER spacecraft.

INSTRUMENT.CAT: Describes physical attributes of the GRS instrument and
provides relevant references to published literature.

MISSION.CAT: Describes the scientific goals and objectives of the MESSENGER 
program. It also identifies key people and institutions.

PERSON.CAT: Lists and provides contact information for the people involved 
with the GRNS instrument on the MESSENGER mission.

REF.CAT: Provides references (reference objects) to scientific papers and 
other publications of interest to those using the data, both for GRS and the 
mission as a whole.