PDS_VERSION_ID      = PDS3                                                    
RECORD_TYPE         = FIXED_LENGTH                                            
RECORD_BYTES        = 80                                                      
OBJECT              = TEXT                                                    
  PUBLICATION_DATE    = 1999-12-30                                            
  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; except where indicated, there are 80 characters   
per line in each file.  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).                                                                        
                                                                              
RSADCSDP.TXT                                                                  
                                                                              
     A Software Interface Specification (SIS) for the archival volume.  This  
document describes the structure and content of the volume.                   
                                                                              
RSTP.TXT                                                                      
                                                                              
     The SIS for files containing temperature-pressure profiles derived from  
radio occultation measurements.  Two versions of the profiles are covered:    
standard resolution (data type TPS) and high-resolution (TPH).                
                                                                              
OCCSUM.TXT                                                                    
                                                                              
     The SIS for Occultation Summary files.  Two versions of the file are     
covered: files containing summaries of standard resolution profiles (data     
type OCS) and files containing summaries from high-resolution profiles (OCH). 
                                                                              
LOSAPDR.TXT                                                                   
                                                                              
     The SIS for Line of Sight Acceleration Profile Data Records (data        
type LOS).                                                                    
                                                                              
SHADR.TXT                                                                     
                                                                              
     The SIS for files containing Spherical Harmonic models (such as gravity  
fields or topography) in ASCII formats (data type SHA).                       
                                                                              
SHBDR.TXT                                                                     
                                                                              
     The SIS for files containing Spherical Harmonic models (such as gravity  
fields or topography) in binary formats (data type SHB).                      
                                                                              
RSDMAP.TXT                                                                    
                                                                              
     The SIS for Radio Science Digital Map products (data type IMG).          
                                                                              
AAS99147.*                                                                    
                                                                              
     Detached PDS label AAS99147.LBL defines a document which describes MGS   
Orbit determination at Goddard Space Flight Center.  The discussion includes  
constraints from the Mars Orbiting Laser Altimeter (MOLA).  The label         
points toward a PostScript version of the document (AAS99147.PS) and a        
version created using LaTeX (AAS99147.TEX), both of which are included        
in this directory.  The PostScript and LaTeX files have variable record       
lengths; but each record is delimited by a carriage-return (ASCII 13)         
line-feed (ASCII 10) pair.                                                    
                                                                              
OCCLOGA2.*                                                                    
                                                                              
     Detached label OCCLOGA2.LBL defines PDS table object OCCLOGA2.TAB which  
contains summary information on each radio occultation opportunity during     
MGS Aerobraking Phase 2.  The table includes start/stop times for data        
acquisition, antenna number, sample rate, filter width, DSP mode, bit         
resolution, record length, number of records, number of missing records,      
maximum signal-to-noise ratio, ODR file name, SOE file name, and comments.    
The comments include a subjective judgment of quality, orbit number, and      
terse notes on problems (if any).