         coordinate system is associated. 
 
              `body' is used by this routine to look up from the 
              kernel pool the prime meridian rate coefficient giving 
              the body's spin sense.  See the Files and Particulars 
              header sections below for details. 
 
   lon        Planetographic longitude of the input point.  This is 
              the angle between the prime meridian and the meridian 
              containing the input point.  For bodies having 
          