roved
version appeared later on <a href="#Jacchia_1972">CIRA 72</a>.<br>
      <br>
      </span>
      <div style="text-align: center;"><span style="font-family: ms sans serif;"><big><big><span style="font-weight: bold;">Jacchia-Roberts</span></big></big></span><br>
      <span style="font-family: ms sans serif;"></span></div>
      <span style="font-family: ms sans serif;"> <br>
Soon after the first Jacchia&#8217;s model, Roberts (<a href="#Roberts">Roberts, 1971</a>) produced an analytical
versio