     The range (i.e., the set of allowed values) of 
              `ra' is unrestricted.  Units are radians.

   dec        is the declination of the point.  This is the angular 
              distance from the XY plane to the point.  

              The range of `dec' is unrestricted.  Units are radians.
 </PRE>
<h4><a name="Detailed_Output">Detailed_Output</a></h4>
<PRE>
 
   rectan     is the array containing the rectangular coordinates of 
              the point.  The output units associated with `rect