Re: Orbit Computation: How? (Was "99099A elements")

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>
>The answer to this question may be over my head, but how does one 'produce'
>elements based on precision observations.  What is the procedure/math
behind
>it?  Is there software to aid in this (formidable?) task?
>
I use elcor, written by Paul Hirose, modified by Mike McCants, available
at Mike's  ftp://ftp.fc.net in /pub/users/mikem.
It needs an approximate starting orbit, relatively correct in time, to
iterate the best orbit, but it does handle all elements including drag
and perturbations over a long period. Mike's own fitelem lets you tweak
the orbit manually.
At ftp://ftp.satellite.eu.org/pub/sat/programs/ibmpc/ you can also find
firstelc, firstfit, firstorb.

There is also IOD by George Lewis.



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