[amsat-bb] SO-50 Frequency Drift

[Ib Christoffersen]

Hi Koss and Paul,
I do not think that the "normal" center frequency is 436.795 MHz.

I use two frequencies for the downlink in SatPC32:

436.791 and 436.788 MHz.

I have heard it suddenly jump about 5 kHz during a pass - but that is some time ago.

The two frequencies above are not always spot on but close enough.

Have a nice weekend all.

OZ1MY/Ib


----- Original meddelelse -----
> Fra: Koos van den Hout <koos at kzdoos.xs4all.nl>
> Til: amsat-bb at amsat.org
> Dato: Lør, 07. jun 2014 12:27
> Emne: Re: [amsat-bb] SO-50 Frequency Drift
> 
> Quoting Paul Stoetzer who wrote on Sat 2014-05-31 at 12:42:
> 
> > Just was on the last pass of SO-50. I was not hearing the
> satellite at
> > first even as it rose above the trees. At the middle of the pass,
> I was
> > expecting to find it at around 436.795 MHz, but I found it around
> 436.786
> > MHz.
> > 
> > Has anybody else noticed this?
> 
> I just had a pass (and worked PD5DJ, thanks!) and I also noted a
> downward
> shift in frequency as I had to select the next downward shifted
> frequency
> earlier than gpredict was showing. Gpredict has the default 436.7950
> in
> its configuration.
> 
> I can't give exact numbers as I was busy trying to hear/make a
> contact but
> there is some downward shift.
> 
>                                                  Koos van den Hout
> 
> -- 
> Koos van den Hout,           PGP keyid DSS/1024 0xF0D7C263 via
> keyservers
> koos at kzdoos.xs4all.nl
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73 OZ1MY
Ib