Re: [amsat-bb] NOVA fixed; AO-40 QSB

[Bill Hurlock <bill@xxxxxxxxxxx>]

I was having the same problem yesterday on the bird before eclispe. I had to
constantly rev polarization from LH to RH. Fades were very slow.

"Edward R. Cole" wrote:

> Thanks for all the suggestions for fixing NOVA on my desktop computer.
>
> I got AO-40 keps working on the laptop last night, so I could predict the
> current pass.  I just now fixed NOVA on the desktop by deleting the
> original kep set and reloading it.  Now it works?  Boy do I like computers.
>
> I have been monitoring AO-10 since 1730 UTC [today] and have noticed an
> interesting slow fade phenomena.  the signals appear to go from S2 to noise
> over a several minute period.  I'm guessing since I'm using a vertical
> antenna that one of the following is happening:
> 1.  I'm seeing a slow faraday signal polarity rotation. {my first guess}
> 2.  It's an artifact of my antenna pattern [omni directional with lots of
> vertical gain].  Multipath?  {This explanation seems bit of a stretch}
> 3.  Spacecraft oreintation is slowly rotating. {squint}
> 4.  My receiver gain is slowly varying by 40 dB over a 10-15 min. period
> {Nah}.  [S2 represents >40 dB SNR on my system]
>
> According to NOVA: at 1855 UTC az=120.5, el=8.0, range 44,277km, and
> signals are beginning to fade.  Anyone else see this QSB?  It has peaked at
> 1908 UTC.
>
> 73, Ed
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