 The routine `<b>pxfrm2_c</b>' is most commonly used to transform a
   position between time-dependant reference frames.

   For more examples of where to use `<b>pxfrm2_c</b>', please see:

         <a href="sincpt_c.html">sincpt_c</a>
         <a href="surfpt_c.html">surfpt_c</a>
         <a href="subslr_c.html">subslr_c</a>
         <a href="ilumin_c.html">ilumin_c</a>
</PRE>
<h4><a name="Examples">Examples</a></h4>
<PRE>
      The numerical results shown for these examples may differ across
      platfo