d rotation model constants.  naif0010.tls is a leapseconds kernel.

      All of the kernels other than the DSK file should be loaded via
      a meta-kernel.  An example of the contents of such a kernel is:

          KPL/MK

          File name: illum.tm

          \begindata

             KERNELS_TO_LOAD = ( 'naif0010.tls'
                                 'pck00010.tpc'
                                 'mar097.bsp' )
          \begintext 


   Example code begins here:

     /.
     Find the illumination