
               SPICETRUE if `spoint' is illuminated; otherwise it is
               SPICEFALSE.
</PRE>
<h4><a name="Parameters">Parameters</a></h4>
<PRE>
 
   None.
 </PRE>
<h4><a name="Exceptions">Exceptions</a></h4>
<PRE>
 
   If any of the listed errors occur, the output arguments are
   left unchanged.
 


   1) If `plid' is not a valid plate ID, the error will be diagnosed
      by a routine in the call tree of this routine. 

   2) If either of the input body names `target' or `obsrvr' cannot be
    