>x</span>sdamo</span></li>
      </ul>
      <span style="font-family: ms sans serif;"> both in FORTRAN and C,
where <span style="font-weight: bold;">x</span> can be &#8220;j&#8221; for <span style="font-weight: bold;">J</span>acchia 70, &#8220;r&#8221; for <span style="font-weight: bold;">R</span>obert&#8217;s analytical version of
Jacchia 70, &#8220;i&#8221; for Jacchia 77 model (numerical <span style="font-weight: bold;">i</span>ntegration),
&#8220;a&#8221; for the <span style="font-weight: bold;">a