\begintext
 
        Recall that the frame `EARTH_FIXED' is a TK frame.  As a result
        its relationship to other frames must be specified via
        a kernel pool variable.  We make that specification here.

        We use IAU_EARTH for now because that is always available.

        \begindata
 
           TKFRAME_EARTH_FIXED_RELATIVE = 'IAU_EARTH'
           TKFRAME_EARTH_FIXED_SPEC     = 'MATRIX'
           TKFRAME_EARTH_FIXED_MATRIX   = ( 1   0   0
                                            0   1   0
                                            0   0   1 )


 
        \begintext

         Use the definition below if you have a high precision ITRF93 binary
         pck file.
   
 
           TKFRAME_EARTH_FIXED_RELATIVE = 'ITRF93'
           TKFRAME_EARTH_FIXED_SPEC     = 'MATRIX'
           TKFRAME_EARTH_FIXED_MATRIX   = ( 1   0   0
                                            0   1   0
                                            0   0   1 )