
         <var class="optional-license-text"> 
            SGP4 Permission Notice
         </var>
         <p>
            There is no license associated with the code and you may use it for any
            purpose—personal or commercial—as you wish. We ask only that you include
            citations in your documentation and source code to show the source of
            the code and provide links to the
            main page, to
            facilitate communications regarding any questions on the theory or source
            code.
         </p>

      