PDS_VERSION_ID      = PDS3                                                    
RECORD_TYPE         = STREAM                                                  
OBJECT              = TEXT                                                    
  PUBLICATION_DATE    =  2015-11-11
  NOTE                = "Description of contents of CATALOG directory"        
END_OBJECT          = TEXT                                                    
END                                                                           
                                                                              
                                                                              
      The CATALOG directory contains mission, host, instrument, reference,    
personnel, and data set PDS catalog objects for this archive volume. The      
files follow the 'streamlined' format adopted by the Planetary Data System    
(PDS) in late 1993 and documented in the Planetary Data System Standards      
Reference (Version 3.1, 3 August 1994; JPL D-7669, Part 2).                   
                                                                              
     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.'   
                                                                              
     Each catalog object is in ASCII; the files have a fixed length of        
70 characters per line. Some files have variable lengths of rows. The details 
and correct values can be found in the label header of each file. 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 Venus Express spacecraft and a very brief           
overview of the ESA and the NASA Ground Station systems.                      
                                                                              
                                                                              
INST.CAT                                                                      
                                                                              
     An overview of the spacecraft radio system used for these experiments on 
Venus Express, and a summary (albeit long) description of the ESA and         
Deep Space Network instrumentation which supports radio science experiments.  
Also included are summaries of the science objectives sought using the        
instrument.                                                                   
                                                                              
                                                                              
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.                                                       
                                                                              
                                                                              
SOFT.CAT                                                                      
                                                                              
     This is a dummy SOFT.CAT with no contents. No software is included in    
     this volume.                                                             
                                                                              
TARGET.CAT                                                                    
                                                                              
    An extensive description of targets used in the data labels.