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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