     &quot;Mars&quot;,  state, &amp;lt              );

           /.
           Convert position to planetographic coordinates.
           ./
           <a href="recpgr_c.html">recpgr_c</a> ( &quot;mars&quot;, state, re, f, &amp;lon, &amp;lat, &amp;alt );

           /.
           Convert velocity to planetographic coordinates.
           ./

           <a href="dpgrdr_c.html">dpgrdr_c</a> ( &quot;MARS&quot;,  state[0],  state[1],  state[2],    
                      re,      f,         jacobi             