ble             radii [3];
                 SpiceDouble             radius;

                 /.
                 The variable `rotate' is a position transformation matrix
                 from the camera frame at `etrec' to the IAU_MARS frame
                 at `etemit'.
                 ./
                 SpiceDouble             rotate [3][3];
                 SpiceDouble             spoint [3];
                 SpiceDouble             srfvec [3];
                 SpiceDouble             tmp [3];

     