         ./
           re  =  radii[0];
           rp  =  radii[2];
           f   =  ( re - rp ) / re;

           /.
           Look up the geometric state of earth as seen from Mars at
           January 1, 2005 TDB, relative to the J2000 reference
           frame.
           ./
           <a href="str2et_c.html">str2et_c</a> ( &quot;January 1, 2005 TDB&quot;, &amp;et);

           <a href="spkezr_c.html">spkezr_c</a> ( &quot;Earth&quot;, et,    &quot;J2000&quot;, &quot;LT+S&quot;,    
                 