                 spoint, &amp;found );

                 if ( !found  )
                 {
                   <a href="setmsg_c.html">setmsg_c</a> (&quot;Could not calculate surface point.&quot;);
                   <a href="sigerr_c.html">sigerr_c</a> (&quot;SPICE(NOTFOUND)&quot;);
                 }
                 <a href="vequ_c.html">vequ_c</a> ( spoint, tmp );

                 /.
                 Convert the intersection point of the boundary
                 FOV vector and Mars from rectangular int