[amsat-bb] Best SDR for satellite reception

[fabrice faure]

hello, you can use gpredict with gqrx to handle leo doppler with funcube
73 de Fabrice F4HHV

Le 13 août 2017 18:23, "Paul Andrews" <w2hro.fn20 at gmail.com> a écrit :

> Has anyone written software to allow the Funcube Dongle to be
> frequency controlled to compensate for LEO satellite doppler?   For
> linear satellites, 1Hz frequency control would be required.   For FM
> 1KHz would be ok.   If it's not possible to control the actual FCD+
> LO, it should be possible to control the baseband audio spectrum.
>
> I first used the FCD+ as a panadapter with an FT-847 with LEO linear
> satellites.
>
> More recently, I use (dual polarization) two (2) Funcube Dongle Plus
> SDRs for 2M EME and they are sensitive wideband (50 KHz) receivers.
> Frequency stability on 144 MHz is very good and easily decode JT65
> signals bounced off the moon.   No doppler compensation is used for
> 144 MHz moon bounce.
>
> WSJT-X will control a commercial radio VFO to compensate for moon
> doppler.   WSJT-X does not support control the FCD+ for doppler
> compensation.
>
> The FCD+ is so widely used, I'm surprised that I have not found an
> application that will control the FCD+ and support doppler
> compensation.
>
> 73 - Paul - W2HRO
>
>
>
>
>
>
> On Sun, Aug 13, 2017 at 7:03 AM, Andrew Rich <vk4tec at internode.on.net>
> wrote:
> > With the proliferation of software defined radios on the market I am
> interested to hear what people think is the best for 137 / 144 / 440 / 1296
> MHz use.
> >
> > I have selected the airspy mini based on the fact
> >
> > It's 12 bits
> > It's got tracking filters
> > It works with sdr sharp, hdsdr, gnuradio, gqrx
> >
> > Has anyone bought out a satellite specific SDR ?
> >
> > The funcube dongle is probably the best ?
> >
> > I have a hack rf as well as rtl sdr and sdr play
> >
> > Andrew
> >
> > Sent from my iPhone
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> to all interested persons worldwide without requiring membership. Opinions
> expressed
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