e point. 
   plid       I   ID of plate on which surface point is located.
   trgepc     O   Target surface point epoch.
   srfvec     O   Vector from observer to target surface point.
   phase      O   Phase angle at the surface point. 
   solar      O   Solar incidence angle at the surface point. 
   emissn     O   Emission angle at the surface point. 
   visible    O   Visibility flag (SPICETRUE = visible).
   lit        O   Illumination flag (SPICETRUE = illuminated).
 </PRE>
<h4><a name="Detailed_Input