="surfpt_c.html">surfpt_c</a>, which is faster than <a href="subpnt_c.html">subpnt_c</a>.

                 If this example program were extended to include all
                 of the pixels in the camera's FOV, a few steps, such as
                 finding the rotation matrix from the camera frame to the
                 IAU_MARS frame, looking up the radii values for Mars,
                 and finding the position of MGS with respect to Mars could
                 be done once and used for every pixel.

