PDS_VERSION_ID        = PDS3                                                  
RECORD_TYPE           = STREAM                                                
OBJECT                = TEXT                                                  
  PUBLICATION_DATE    = 2013-10-11                                            
  NOTE                = "Description of CATALOG directory contents for 
                         GRAIL archive volumes."        
END_OBJECT            = TEXT                                                  
END                                                                           

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

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

LGRS_A_INST.CAT: An overview of the spacecraft radio system, Lunar Gravity 
Ranging System A, used for Gravity Science on GRAIL, and a summary 
description of the Deep Space Network instrumentation that supports radio 
science experiments.

LGRS_B_INST.CAT: An overview of the spacecraft radio system, Lunar Gravity 
Ranging System B, used for Gravity Science on GRAIL, and a summary 
description of the Deep Space Network instrumentation that supports radio 
science experiments.

INSTHOST_A.CAT: A brief description of the GRAIL-A and DSN components.

INSTHOST_B.CAT: A brief description of the GRAIL-B and DSN components.

MISSION.CAT: A brief description of the mission.  It includes a chronology
of events, definition of mission phases, and science objectives.

PERSON.CAT: A listing of key people involved in analyzing the gravity data
and in producing the archival data set.

REF.CAT: A listing of references used elsewhere in the catalog files and of
references that might be generally useful in working with these data.

LGRS_CDR_DS.CAT: A description of the GRAIL calibrated spacecraft data set 
(LGRS CDR, GRAIL-L-LGRS-3-CDR-V1.0) contained in the GRAIL_0101 archival 
volume.