[amsat-bb] Need help decoding EO-79 packets.

J. Boyd (JR2TTS) the2belo at msd.biglobe.ne.jp
Thu Apr 21 22:56:34 UTC 2016

On Thu, 21 Apr 2016 17:43:36 -0500, "JoAnne Maenpaa" <k9jkm at comcast.net> wrote:

> > There were some other things in my Soundmodem settings that did not
> > agree with the instructions for DeorbitSail, that may have messed it up,
> > so I'll try again this morning during the next pass.
> I'm continuing to experiment by myself on this subject of receiving
> telemetry data using an SDR dongle and software. I've appreciated all the
> bits of information offered by the stations who are already up and running.
> One thing I'm finding with software packet reception is that the software
> "modem" or software "TNC" (i.e.: soundmodem) seems to expect packets with a
> good checksum. Just a single bit-flip and I don't have data.

In soundmodem, I had "Bits Recovery" set to "SINGLE" initially, while
the DeorbitSail page seems to suggest it's more properly set to "NONE".
Not sure if that's significant, but your comment about flipped bits made
me suspect this. Anything's worth trying once.

J. Boyd, JR2TTS/NI3B
the2belo at msd.biglobe.ne.jp
Twitter: @Minus2_C

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