Re: [amsat-bb] AO-10. WOW!.

["KF4FDJ (Mike in Fort Myers, FL)" <seven77@xxxxxxxx>]

Peter,

I have noticed a tremendous attenuation of mode J downlinks today as the birds reach
the northern latitudes.  The only thing I can think is that some remarkable sporadic E
propagation is happening associated with a weather system in the north.  I can start
an Oscar 29 QSO here in the extreme south, with little noise, and as the bird advances
north, the signal/noise ratio goes to pot, and I have to sit on the polarity switchers
to optimize the downlink.

I would be curious if anybody up north has checked for any vhf/uhf propagation on
terrestrial paths.  What you have said supports my theory.  Maybe as the bird was at
the horizon, you were getting some sporatic E skip from the same source that is
attenuating the sky signals from the birds at a more obtuse angle.

I would appreciate more open forum discussion of the phenomenon we are witnessing
today!

73, Mike kf4fdj@amsat.org

Peter Rogers wrote:

> ... Round table with KC2PJX, N6PAA, N2YAC, K6YK all with the satellite below
> the horizon, at least all our keps showed below, my AZ and EL at the finish
> showed 114, -46, my actual settings were EL 0, AZ 180.
>
>         My keps were the adjusted ones on the BB, we think it was a bending of the
> signals over the horizon, anyone out there have a better explanation??
>
>         My total QSO's from 18:30 UTC till 19:30 UTC were 8, not bad for a busted
> satellite eh!
>
> 73 Peter.  VE7AHX.
>
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