 pointer `body' is null.
 </PRE>
<h4><a name="Files">Files</a></h4>
<PRE>
 
   This routine expects a kernel variable giving body's prime 
   meridian angle as a function of time to be available in the 
   kernel pool.  Normally this item is provided by loading a PCK 
   file.  The required kernel variable is named  
 
      BODY&lt;body ID&gt;_PM  
 
   where &lt;body ID&gt; represents a string containing the NAIF integer  
   ID code for `body'.  For example, if `body' is &quot;JUPITER&quot;, then  
   th