ixed
                    as the illumination source)

      <a href="cspice_illum.html">cspice_illum</a>  (deprecated)

   <b>cspice_illumf</b> is the most capable of the set.


   Illumination angles
   ===================

   The term &quot;illumination angles&quot; refers to the following set of
   angles:


      phase angle              Angle between the vectors from the
                               surface point to the observer and
                               from the surface point to the
       