PDS_VERSION_ID      = PDS3                                                    
RECORD_TYPE         = FIXED_LENGTH                                            
RECORD_BYTES        = 80                                                      
OBJECT              = TEXT                                                    
  PUBLICATION_DATE    = 2000-03-30                                            
  NOTE                = "Description of contents of DOCUMENT directory "      
END_OBJECT          = TEXT                                                    
END                                                                           
                                                                              
                                                                              
                                                                              
      The DOCUMENT directory contains documentation on the archival data      
set and files within the data set.                                            
                                                                              
     Each file is in ASCII, with 80 characters per line.  Each line is        
delimited with a carriage-return (ASCII 13) line-feed (ASCII 10) pair.        
                                                                              
     The files are:                                                           
                                                                              
                                                                              
DOCINFO.TXT                                                                   
                                                                              
     A brief description of the files within the DOCUMENT directory           
(this file).                                                                  
                                                                              
AMD_SIS.HTM                                                                   
                                                                              
     SIS for Angular Momentum Desaturation Files (AMD).                       
                                                                              
ANTFILES.TXT                                                                  
                                                                              
     A description of the MGS spacecraft antennas, coordinate systems         
useful in defining their locations and orientations, and software which       
allows reconstruction of both position and pointing.  Software is part        
of the NAIF Toolkit, so there is also a reference to TK_FTP.TXT.              
                                                                              
GDF_SPK.TXT                                                                   
                                                                              
     A brief description of the GDF files, with reference to additional       
documentation on the NAIF Toolkit and file formats with which GDF files       
are compatible.                                                               
                                                                              
GDN_SPK.TXT                                                                   
                                                                              
     A brief description of the GDN files, with reference to additional       
documentation on the NAIF Toolkit and file formats with which GDN files       
are compatible.                                                               
                                                                              
IPN_SPK.TXT                                                                   
                                                                              
     A brief description of the IPN files, with reference to additional       
documentation on the NAIF Toolkit and file formats with which IPN files       
are compatible.                                                               
                                                                              
LIT_SIS.HTM                                                                   
                                                                              
     SIS for Light Time Files (LIT).                                          
                                                                              
MEDIASIS.HTM                                                                  
                                                                              
     Format and content description for Media Calibration files (ION          
and TRO).  Should be used in conjunction with TRK_2_23.TXT.                   
                                                                              
MGSRSSIS.TXT                                                                  
                                                                              
     The Software Interface Specification (SIS) for the Mars Global           
Surveyor (MGS) Raw Data Archive (RDA).  It describes both the format and      
content of the archival data set.                                             
                                                                              
MIF_SIS.HTM                                                                   
                                                                              
     SIS for Maneuver Implementation/Reconstruction Files (MIF).              
                                                                              
MPD_SIS.HTM                                                                   
                                                                              
     SIS for Maneuver Performance Data Files (MPD).                           
                                                                              
MPF_SIS.HTM                                                                   
                                                                              
     SIS for Maneuver Profile Files (MPF).                                    
                                                                              
TK_FTP.TXT                                                                    
                                                                              
     Instructions for obtaining NAIF Toolkit software via the Internet.       
Points to documentation on Toolkit organization and use.                      
                                                                              
TK_DESCR.TXT                                                                  
                                                                              
     Description of directory structure and contents of NAIF Toolkit          
delivery for Sun computers.  Description of package for other platforms       
is similar and can be obtained using instructions in TK_FTP.TXT.              
                                                                              
TK_INSTL.TXT                                                                  
                                                                              
     Instructions for installing the NAIF Toolkit on a Sun computer.          
Information for other platforms will be similar and can be obtained using     
instructions in TK_FTP.TXT.                                                   
                                                                              
TRK_2_21.TXT                                                                  
                                                                              
     SIS for the Earth Orientation Parameter (EOP) file, which contains       
data on rotation of the Earth.                                                
                                                                              
TRK_2_23.TXT                                                                  
                                                                              
     SIS for Media Calibration Files -- Ionosphere Calibration files (ION)    
and Troposphere Calibration files (TRO).                                      
                                                                              
TRK_2_24.TXT                                                                  
                                                                              
     SIS for DSN Weather Files (WEA).  Released version of this document      
is not current; it will not be included with archival volumes until an        
update has been completed.