 bftran ( ra, dec, w, tipm )
               {
 
                /. 
                Compute the transformation from inertial to body 
                fixed coordinates, given the directions of the north 
                pole and prime meridian of the body. 
                ./

                SpiceDouble   ra;
                SpiceDouble   dec; 
                SpiceDouble   w;
                SpiceDouble   tipm [3][3];
 
 
                /.
                The transformation is defined by the compund 
   