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Re: re AO-40:tracking in USA xmsatellites as test sig



If I'm hearing what I think I'm hearing, this is an awsome tool.

I set my Rx for the 2333mhz frequency (no doppler), and begin sweeping
the antenna towards the predicted location.  There's a very definite
increase in the noise floor, and this on a system that cannot hear
the Sun at all.  What is most interesting is listening to the QSB
in the noise as the antenna sweeps.

I think what I am hearing are the various lobes and sub-lobes in
my receive pattern.  A systematic sweep, looking at the S-meter,
should be able to "paint" where the hot spots are.  Either I could
use that to aim the antenna, or even better, to look at the pattern
and get an idea what's wrong (various aberations, and such).

The only issue is that I'm pretty sure that both birds are behind
some trees (ok, so it's dark right now), so I may be looking more at
the pattern of branches than the antenna pattern.  Has anyone else
tried a wide sweep to see how their antennas behave?

73s,

Greg  KO6TH


>From: ahelmfelt@yahoo.com.ar
>To: amsat-bb@AMSAT.Org
>Subject: Re: [amsat-bb] re AO-40:tracking in USA xmsatellites as test  sig
>Date: Tue, 10 Jul 2001 02:00:30 GMT
>
>I did a small search and found this elements, I tested the frecuency and 
>aim
>the antenna and I received a increase off signal level, must remember that
>is a 1,5 meg tx with.
>Bets regrads....
>
>Al  LU2FGN
>
>
>XM-1
>1 26761U 01018A   01180.25087720 -.00000215  00000-0  00000+0 0   846
>2 26761   0.0335 186.6689 0000342  11.7539  84.1993  1.00271486   591
>XM-2
>1 26724U 01012A   01181.59058316 -.00000033  00000-0  00000+0 0  1171
>2 26724   0.0246 180.9143 0001019  24.1538 171.2371  1.00271512  1131
>

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