Douglas, if this can help, you will find here : http://f5yg.pagesperso-orange.fr/incoming/CAS-4A_telemetry.txt 152 frames of the pass, orbit nr 17, this morning June 16th, starting at 0730 UTC, each frame 147 bytes (coded hexa).
73 !
J-P F5YG
On 16/06/2017 18:31, Jean-Pierre Godet wrote:
Hi Douglas, all,
On the next passes over the south of western Europe, tomorrow morning, I will record an i/q file and give you a link to download it (caution : 1 mn ==> 100 MB).
Despite the fact that the two birds here never climbs very high above the horizon, maybe 30 deg., the signal is very strong and the demodulation of the 4800 bps GMSK telemetry very easy. During the pass, you doesn't lose a frame. Conditions : GPA + preamplifier in the attic, FCD-Pro+, Gqrx (SDR prgm), Gpredict (Doppler shift tracking), DireWolf 1200/2400/4800/9600 bps FSK/GMSK demodulator).
Have a nice evening, 73 !
J-P F5YG
On 16/06/2017 16:30, Douglas Quagliana wrote:
Does anyone have an SDR recording of CAS4A / CAS4B? I would like to try to demodulate and decode the 4800 baud telemetry signals and see what they say.
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Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb