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Re: Some P4 moon landing ideas :-)



You're all a bunch of lunatics.

:)

----- Original Message -----
From: "Tony Langdon" <tlangdon@atctraining.com.au>
To: "'Reicher, James'" <JReicher@hrblock.com>; "'Edward R. Cole'"
<al7eb@ptialaska.net>; <amsat-bb@AMSAT.Org>
Sent: Monday, July 01, 2002 7:25 PM
Subject: RE: [amsat-bb] Some P4 moon landing ideas :-)


> > The high gain antenna wouldn't need any steering to look back
> > at Earth, once
> > it was set.  The Moon is in a tidal lock with Earth and is
> > ALWAYS showing
> > the same side to us.  Aiming a gain antenna to lock in would
> > be relatively
> > easy since once the aim is set, you'd never have to move it again!
>
> That is only true for relatively low gain antennas (with a beamwidth of
> greater than 10-20 degrees).  The Earth does move around a bit in the
lunar
> sky, due to libration.
>
> Someone a while back posted an excellent link which had calculations of
how
> much the Earth moved around the lunar sky.
>
> Also, as a bit of trivia, it is possible to see 59% of the lunar surface
> from the Earth, if you observe the Moon for long enough as it "rocks"
> around. :)
>
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