PDS_VERSION_ID      = PDS3                                                    
RECORD_TYPE         = FIXED_LENGTH                                            
RECORD_BYTES        = 80                                                      
OBJECT              = TEXT                                                    
  PUBLICATION_DATE    = 2015-10-10                                            
  NOTE                = "Description of contents of CATALOG directory "       
END_OBJECT          = TEXT                                                    
END                                                                           
                                                                              
                                                                              
                                                                              
The CATALOG directory contains mission, host, instrument, reference,    
personnel, data set, and data set map projection PDS catalog objects for      
this archive volume. Each catalog object is in ASCII, with a maximum of 
72 characters per line.  Each line is delimited with a carriage-return 
(ASCII 13) line-feed (ASCII 10) pair.                                                              
                                                                              
     The files are:                                                           
                                                                              
                                                                              
MISSION.CAT                                                                   
                                                                              
A brief description of the mission.  It includes a chronology of events, 
definition of mission phases, and science objectives.                         
                                                                              
                                                                              
INSTHOST.CAT                                                                  
                                                                              
A description of the Mariner 9 spacecraft and a very brief    
overview of the NASA Deep Space Network.                                      
                                                                              
                                                                              
INST.CAT                                                                      
                                                                              
A brief overview of the spacecraft radio system used for these experiments on 
Mariner 9.
                                                                              
                                                                              
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.         
                                                                              
                                                                              
PERSON.CAT                                                                    
                                                                              
A listing of key people involved in analyzing the radio data and in      
producing the archival data set.                                              
                                                                              
                                                                              
DATASET.CAT                                                                   
                                                                              
A description of the data set contained in the archival volumes.  The    
file includes information on the primary data types included in the archive   
collection.  Brief discussions of the quality of the data are included where  
a judgment can be made.