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Re: PSK tone interesting on AO-40



Greg,
You probably heard the ranging that has been carried  out
by the command stations over the last few days.
Best regards,
Colin VK5HI

----- Original Message -----
From: "Greg D." <ko6th_greg@hotmail.com>
To: <amsat-bb@AMSAT.Org>
Sent: Tuesday, July 03, 2001 10:01 PM
Subject: Re: [amsat-bb] PSK tone interesting on AO-40


> Hi folks,
>
> I noticed something strange a couple of nights ago too, but it
> wasn't a frequency shift.  The waterfall on AO40RCV changed
> suddenly from being a pair of combs to a pair of fuzzy bands.
> It stayed there for a minute or so, during which telemetry stopped.
> Then it suddenly changed back, and telemetry resumed.
>
> If it happens again, I'll check the telemetry for the magnets
> being on.  Could there be another problem (like, on my end)?
>
> 73s,
>
> Greg  KO6TH
>
>
> >From: Peter Guelzow <peter.guelzow@arcormail.de>
> >To: Howard Long <howard@howardlong.com>
> >CC: amsat-bb@AMSAT.Org
> >Subject: Re: [amsat-bb] PSK tone interesting on AO-40
> >Date: Tue, 03 Jul 2001 20:48:24 +0000
> >
> >Hi Howard,
> >
> >Howard Long wrote:
> > >
> > > Sitting here in the shack listening to AO-40 (and watching the
> >telemetry)
> > > tonight, the PSK tone seems to lower by a few tens of hertz for a
couple
> >of
> > > seconds and then rise back again.
> > >
> > > I've never heard this before, but I'm sure someone will be able to
> >explain.
> > > Can't see anything obvious from the telemetry myself.
> >
> >This is due to the magnetorquing around perigee...
> >
> >73s Peter DB2OS
> >
> >
> >----
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>
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