[amsat-bb] CAS4A CAS4B SDR recordings?

[Jean-Pierre Godet]

   Hi Douglas, all!

   I'm late as Scott just shared  his full pass excellent i/q file and 
nice video.
   If this can help, I recorded only 50 secondes of the last pass over 
western Europe (orbit nr 32) so that the files don't become too large.

A 32-bit floating point raw i/q file (for Gqrx, etc...):
http://f5yg.pagesperso-orange.fr/incoming/CAS-4A_20170617_orb32.raw

The same one translated in a PCM 16-bit wav file (for SDR#, etc...):
http://f5yg.pagesperso-orange.fr/incoming/CAS-4A_20170617_orb32.wav

The full 199 frames of this 50 seconds record (text hexa):
http://f5yg.pagesperso-orange.fr/incoming/CAS-4A_20170617_orb32.txt

And the sound of space with the CW telemetry (mp3):
http://f5yg.pagesperso-orange.fr/incoming/CAS-4A_20170617_orb32.mp3

   Have a nice w.-e.!

   J-P F5YG

On 16/06/2017 19:03, Jean-Pierre Godet wrote:
>    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.
>>>
>>> Regards,
>>> Douglas
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>> _______________________________________________
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>> of AMSAT-NA.
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