Re: Maximum distance to launch ground tracks

From: Patrick JL (patricjl@club-internet.fr)
Date: Mon Apr 30 2001 - 00:33:15 PDT

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    Although I'm not able to answer your maths question about arccos function,
    may I remind you can find nearly every maths function in MS Excel.
    
    Patrick Lumiot, Paris.
    
    ----- Message d'origine -----
    De : "Jonathan T Wojack" <tlj18@juno.com>
    À : <SeeSat-L@blackadder.lmsal.com>
    Envoyé : dimanche 29 avril 2001 23:00
    Objet : Re: Maximum distance to launch ground tracks
    
    
    > > The formula for maximum surface distance on the Earth (in
    > > kilometers) an
    > > object at HEIGHT (also in kilometers) can be seen is given by:
    >
    > At the calculated distance - at what altitude is the object above the
    > observer's horizon?
    >
    > > DIST = 6371 * {arccos[6371/(6371 + HEIGHT)]  /  57.29577}
    >
    > I'm not familiar with the term "arccos".  How does it differ from the
    > mathematical function cosine?
    >
    > ------------------------------
    > Jonathan T. Wojack                 tlj18@juno.com
    > 39.706d N   75.683d W
    >
    > 4 hours behind UT (-4)
    
    
    
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