  I   The reference frame of the states. 
   first      I   First valid time for which states can be computed. 
   last       I   Last valid time for which states can be computed. 
   segid      I   Segment identifier. 
   gm         I   Gravitational parameter of central body. 
   n          I   Number of states and epochs. 
   states     I   States. 
   epochs     I   Epochs. 
 </PRE>
<h4><a name="Detailed_Input">Detailed_Input</a></h4>
<PRE>
 
   handle      is the file handle of an SPK file that has bee