e name of the kernel variable containing the prime meridian  
   angle coefficients is  
 
      BODY599_PM 
 
   See the PCK Required Reading for details concerning the prime 
   meridian kernel variable. 
 
   The optional kernel variable  
    
      BODY&lt;body ID&gt;_PGR_POSITIVE_LON 
 
   also is normally defined via loading a text kernel. When this 
   variable is present in the kernel pool, the prime meridian 
   coefficients for `body' are not required by this routine. See the 
   Particulars sect