Document list:
   
   SEDR     NATIONAL AERONAUTICS AND SPACE ADMINISTRATION    
                       Ames Research Center    
                    Moffett Field, California    
                      PIONEER VENUS PROJECT    
                     SPECIFICATION PC-456.O4    
              PIONEER VENUS:  DATA USER REQUIREMENTS    
            FOR SUPPLEMENTARY EXPERIMENTER DATA RECORDS    
                        May 15, 1976

   MISSION  Mission and Spacecraft information for both the Orbiter and
            probes derived from the Mission and Insthost catalog files.
            The hypertext version includes many GIF images of useful tables
            and figures published in Fimmel et al, 1995 (Nasa SP-518,
            Pioneering Venus: A Planet Unvailed),

  COORDSYS  The PDS no longer catalogs coordinate system information.
            This file COORDSYS.TXT, was extracted from the old PDS
            coordinate system catalog.

The DOCUMENT directory contains 2 sub-directories, each of which contains
a single document. All of the documents are fully reproduced.
For each document, there is an ASCII text version of the original text and
there are scanned images which can be viewed to see the graphics from the
original documents.  Scanned image files are stored in Graphic Interchange
Format files (GIF) in the GIF89a format. This format can be loaded into
numerous word processors and drawing packages. Each file contains a single
figure of the original document. The file naming convention is FIGxx.GIF
and/or TABxx.GIF where xx is the figure/table number. There is also an HTML
document available which preserves the original format of the document as much
as possible.