Re: Perigee & Apogee Height

From: Björn Gimle (b_gimle@algonet.se)
Date: Sat Dec 14 2002 - 12:39:15 EST

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You can get it from excentricity (e), semi-major axis (a) and Earth's
radius R as
a(1-e)-R and a(1+e)-R, but computing a from TLE is a complex process,
described in the SpaceTrack Report (no.3?) and in freeware source
programs like elcor, seesat and trakstar.

Better (?) is to accept the output from Orbitel.exe or Element Manager
etc.
http://www.dransom.com/orbitel.html
http://www.satobs.org/orbsoft.html

----- Original Message -----
From: "James" <james.mindham@btinternet.com>
To: "SeeSat-L@satobs. Org" <SeeSat-L@satobs.org>
Sent: Saturday, December 14, 2002 6:15 PM
Subject: Perigee & Apogee Height


> Can someone explain how the Perigee & Apogee Height of a sat is
calculated
> from a TLE?
>
> Cheers,
>
> James
>
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