Retrieve frame ID code and name to associate with a frame center. 

   None. 

   VARIABLE  I/O  DESCRIPTION 
   --------  ---  -------------------------------------------------- 
   cent       I   An object to associate a frame with. 
   lenout     I   Available space in output string frname.
   frcode     O   The ID code of the frame associated with cent.
   frname     O   The name of the frame with ID frcode.
   found      O   SPICETRUE if the requested information is available. 

   cent        is the ID code for object for which there is a 
               preferred reference frame. 

   lenout      is the available space in the output string frname,
               including room for the terminating null character.

   frcode      is the frame ID code to associate with the object 
               specified by cent. 

   frname      is the name of the frame that should be associated 
               with the object specified by cent. 

   found       is SPICETRUE if the appropriate frame ID code and frame 
               name can be determined.  Otherwise found is returned 
               with the value SPICEFALSE. 

   None. 

   This routine allows the user to determine the frame that should 
   be associated with a particular object.   For example, if you 
   need the frame to associate with the Io, you can call cidfrm_c 
   to determine the frame name and ID code for the bodyfixed frame 
   of Io. 

   The preferred frame to use with an object is specified via one 
   of the kernel pool variables: 

       OBJECT_<cent>_FRAME 

   where <cent> is the decimal representation of the integer cent. 

   For those PCK objects that have "built-in" frame names this 
   routine returns the corresponding "IAU" frame and frame ID code. 

   Suppose that you want to determine the state of a target in the
   preferred reference frame of some observer.  This routine can be
   used in conjunction with spkezr_c to compute the state.

      #include <stdlib.h>
      #include <stdio.h>
      #include "SpiceUsr.h"

      #define LENOUT   32
           .
           .
           .

      cidfrm_c ( obs, LENOUT, &frcode, frname, &found ); 

      if ( !found )
      {
         printf ( "The bodyfixed frame for object %d\n" 
                  "could not be identified.\n",
                  obs                                   );
         exit(1);
      }

      spkezr_c ( targ, et, frname, abcorr, obs, state, &lt );

   None. 

   None. 

   None. 

    N.J. Bachman    (JPL)
    W.L. Taber      (JPL) 

    None. 

   -CSPICE Version 1.0.0, 22-JUL-1999 (NJB) (WLT)

   Fetch reference frame attributes