  I   Name of the frame to transform to.
   etfrom     I   Evaluation time of `from' frame.
   etto       I   Evaluation time of `to' frame.
   rotate     O   A position transformation matrix from
                  frame `from' to frame `to'.
</PRE>
<h4><a name="Detailed_Input">Detailed_Input</a></h4>
<PRE>
   from       is the name of a reference frame recognized by
              cspice that corresponds to the input `etfrom'.


   to         is the name of a reference frame recognized by
              cspi