is 
   system.  It allows you to retrieve position information for any 
   ephemeris object relative to any other in a reference frame that 
   is convenient for further computations. 
 
   This routine is identical in function to the routine SPKEZP 
   except that it allows you to refer to ephemeris objects by name 
   (via a character string). 
 
 
   Aberration corrections 
   ====================== 
 
   In space science or engineering applications one frequently 
   wishes to know where to point a remo