      and sub-solar points, respectively.)

      In the following example program, the file

         phobos_3_3.bds

      is a DSK file containing a type 2 segment that provides a plate model 
      representation of the surface of Phobos.  The file

         mar097.bsp

      is a binary SPK file containing data for Phobos, Mars, and the
      Sun for a time interval starting at the date

         2000 JAN 1 12:00:00 TDB.

      pck00010.tpc is a planetary constants kernel file containing radii
      an