PDS_VERSION_ID      = PDS3                                                    
RECORD_TYPE         = STREAM                   
OBJECT              = TEXT                                                    
  PUBLICATION_DATE    =  2019-01-10
  NOTE                = "Description of contents of DOCUMENT directory"       
END_OBJECT          = TEXT                                                    
END                                                                           
                                                                              
                                                                              
     The DOCUMENT directory contains the files that provide documentation and 
     supplementary information to assist in understanding and using the data 
     products on the volume.                   
                                                                              
     The files evolved as the mission progressed; users should refer to the   
files on the most recent (highest numbered) archive volume for the most       
up-to-date information.  Files on early volumes may be only 'place-holders.'  
                                                                              
Structure of the DOCUMENT directory:

DOCUMENT                                                            
     |                                                                      
     |- DOCINFO.TXT                                                   
     |                                                                 
     |- MEX_MRS_RIU_IS_3050.PDF           File naming convention for  
     |                                    Higher Science Products.    
     |                                                                
     |- MARS_DESC.TXT                     Description of the Mars     
     |                                    Express Radio Science       
     |                                    Experiment MaRS.            
     |                                                                
     |- MEX-MRS-RIU-MA-3008.PDF           Flight operations manual    
     |                                    Experiment user manual.     
     |                                                                
     |- MEX_POINTING_MODE_DESC.TXT        MEX pointing mode           
     |                                    description.                
     |                                                                
     |- MEX_MRS_RIU_MP_001.TAB            Mars Express Mission        
     |                                    phases.                     
     |                                                                
     |- M00SUMMNNO_O07_071150000_01.TAB   Summary of NNO measurements.
     |                                                                
     |- M00SUMMDSN_O07_071150000_01.TAB   Summary of DSN measurements.
     |                                                          
   
The documents are either in PDF-Format or are text files in ASCII with 
variable length of characters per line. Each line is delimited with a 
carriage-return (ASCII 13) line-feed (ASCII 10) pair.