[amsat-bb] AO-85 Downlink Frequency Shifted Down 2.5Khz ?
Hasan al-Basri
hbasri.schiers6 at gmail.com
Sun Nov 3 11:19:11 UTC 2019
Yes it is off freq (often) and by the amount you mentioned. I'm guessing it
is thermal.
73, N0AN
Hasan
On Sun, Nov 3, 2019, 1:43 AM James Pierce via AMSAT-BB <amsat-bb at amsat.org>
wrote:
> The last couple of passes I’ve chased AO-85 over Australia the downlink is
> appearing about 2.5Khz lower than expected.
>
> I am uplinking at 435.170 and was expecting the downlink at 145.978.6 …
> however it seems the return is arriving at more like 145.976.1- The signal
> coming back is excellent once tuned, especially while the bird is higher in
> the pass. And yes, for anyone wondering, I use macdoppler for full doppler
> tuning through the whole pass.
>
> Can anyone shed any light as to what may be happening? I’ve always found
> AO-85 to be a very quiet bird over Australia, and I wonder if this may be
> part of the reason.
>
> James - VK3VJP
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