 angles at both the sub-observer point and
     sub-solar point on Phobos as seen from Mars for a specified
     sequence of times. Perform each computation twice, using both the
     &quot;intercept&quot; and &quot;ellipsoid near point&quot; options for the sub-observer
     point and sub-solar point computations. Compute the corresponding
     illumination angles using an ellipsoidal surface for comparison.
     ./

        #include &lt;stdio.h&gt;
        #include &lt;math.h&gt;
        #include &quot;Sp