Format for Viking and Pathfinder Range Observations

     2    Spacecraft Number : 1 - Viking 1
                              2 - Viking 2
                              3 - Pathfinder

   4-5    Number of the Transmitting Station (DSS #)

   7-8    Number of the Receiving Station (DSS #)

 10-29    Date and Time (UTC) of Signal Reception

 31-46    Round-trip Light-Time [Microseconds]

 49-53    A priori uncertainty  [Microseconds]

 56-60    (0.0 for Ranging)