[amsat-bb] New Telemetry Decoder for FalconSat-3

[Chris Thompson]

Graham,

The data is Frequency Shift Keying - FSK - so set the sdr to NFM.  15kHz
wide seems reasonable to start with.

You should see bytes decoded in hs_soundmodem.  If that is working, but the
ground station is not decoding then make sure you have the TCP connection
setup correctly.

Chris

On Sat, Feb 9, 2019 at 9:16 AM Graham <planophore at aei.ca> wrote:

> Chris,
>
> thank for posting this and all your work.
>
> I monitored an early morning pass at my location (around 2019-02-09
> 12:56) and noted good signal strength.
>
> I am using a simple 70cm turnstile with mast mounted pre-amp, airspy
> mini, and SDR#.
>
> Also, using high speed HS soundmodem configured for G3RUH 9600 baud all
> configured following the description in the pacsat ground manual document.
>
> SDR# has audio filtering turned off as I do for use with the FOX sat
> programs.
>
> So far, no decodes.
>
> So, my primary question as this point is - what mode should the radio
> bet set to?  NFM? WFM? USB?  Bandwidth?  I am currently set to 15kHz
> bandwidth.
>
> I automatically correct for doppler.
>
> cheers, Graham ve3gtc
>
>
> On 2019-02-08 22:53:33, Chris Thompson wrote:
> > I've written a new Ground station for FalconSat-3. If you had an initial
> go
> > with WISP without success or if you have never tried to decode
> FalconSat-3,
> > now is a good time to try.  This requires much less setup than WISP.  And
> > don't be put off if you don't have a hardware TNC, this will work with a
> > soundcard TNC. Or, if you didn't try to listen to FalconSat-3 because you
> > don't have a station that can transmit commands to the spacecraft, then
> > read on. We still need your help to decode telemetry.
> >
> > In particular we would like to encourage people to download the Telemetry
> > and forward it to an AMSAT telemetry server.  Currently more telemetry is
> > generated than we can download with AMSAT Operations ground stations.
> > Receive only stations can contribute to that as well as stations equipped
> > to transmit to FalconSat-3 and request files.  You can see telemetry
> > uploaded so far here: http://tlm.amsatfox.org/tlm/FalconSat-3
> >
> > There are details about the spacecraft, how to install the software and
> how
> > it works in the manual available if you download the software or online
> > here: http://www.g0kla.com/pacsat/pacsat_ground_manual.pdf
> >
> > You can download the software at www.g0kla.com/pacsat/index.php.  I have
> > also written some blog posts and thoughts about the software for anyone
> > interested.  They are linked from the download page.
> >
> > There is much to do here of course and most of it probably won't get
> done.
> > I would call this a beta release.  If you have suggestions or bug fixes
> > please log them online at https://github.com/ac2cz/Falcon/issues or
> send me
> > an email.
> >
> > The software is open source.  All the details are here:
> > https://github.com/ac2cz/Falcon/  The telemetry processing and display
> > leverages common code from FoxTelem in a library here:
> > https://github.com/ac2cz/libTelem/
> >
> >
> >
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-- 
Chris E. Thompson
chrisethompson at gmail.com
g0kla at arrl.net