_furnsh</a>( 'illum_t2.tm' )


         %
         % Convert the UTC request time string to seconds past
         % J2000 TDB.
         %
         utc = '2003 OCT 13 06:00:00 UTC';

         et = <a href="cspice_str2et.html">cspice_str2et</a>( utc );

         %
         % Assign observer, target, and illumination source
         % names. The acronym MGS indicates Mars Global
         % Surveyor. See NAIF_IDS for a list of names
         % recognized by SPICE.
         %
         % Also set the target body-