erver and 
               target in seconds. If the target position is 
               corrected for aberrations, then `lt' is the one-way 
               light time between the observer and the light time 
               corrected target location. 
 </PRE>
<h4><a name="Parameters">Parameters</a></h4>
<PRE>
 
   None. 
 </PRE>
<h4><a name="Exceptions">Exceptions</a></h4>
<PRE>
 
   1) If name of target or observer cannot be translated to its 
      NAIF ID code, the error SPICE(IDCODENOTFOUND) is signaled. 