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Re: Calculating satellite orbits in advance



Thanks for your input.  At this point, we are looking at this for an
exercise only.  I have been asked to see what the available of the
satellites would be for the end of October when the exercise we are thinking
of using them for will be held.  For use in an actual emergency, this would
be considered an option of last restort.

Thanks
Ron

----- Original Message -----
From: "Assi Friedman" <4x1kx@iarc.org>
To: "Ronald Nutter" <rnutter@networkref.com>
Sent: Sunday, August 03, 2003 6:59 PM
Subject: RE: [amsat-bb] Calculating satellite orbits in advance


> Ron,
> It depends heavily on the orbit and spacecraft. In the higher LEO orbits,
> predications can be for usable communications for a month or two. In the
> lower LEO orbits its much shorter, and can be just a couple of weeks.
> I would not baseline emergency communications via a LEO spacecraft unless
> you have the ability to determine its orbit independently of NORAD. With
the
> political environment, there is a good chance that next time something
> happens, govt agencies will close all information sources including
> keplerian elements. A fact which might leave your group stranded in a time
> of need.
> Assi kk7kx/4x1kx
>
>
> -----Original Message-----
> From: owner-AMSAT-BB@AMSAT.Org [mailto:owner-AMSAT-BB@AMSAT.Org]On
> Behalf Of Ronald Nutter
> Sent: Sun, August 03, 2003 3:02 PM
> To: amsat-bb@AMSAT.Org
> Subject: [amsat-bb] Calculating satellite orbits in advance
>
>
> My ARES group is considering the use of satellites in an upcoming
exercise.
> The best I have been able to do is about 30 days in advance.  How far in
> advance can I reasonable hope to do a satellite pass projection, what kind
> of accuracy can I hope for and what software seems to be best for this
type
> of projection ?
>
> Thanks,
>
> Ron
> Ka4kyi
>
>
> ----
> Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
> Not an AMSAT member? Join now to support the amateur satellite program!
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>
>


----
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