Sample Audio Files?

[K4KDR]

Could you please make available sample audio files for us to test the beacon & telemetry packet decoders?

Thank you and best wishes for success with your satellite!

-Scott, K4KDR

[janvgils]

I second this request, maybe something similar to what the OPS-SAT team shared with the community.
(https://github.com/esa/gr-opssat/tree/master/recordings)

Good luck with your mission

Jan - PE0SAT

[mgm8]

@K4KDR @janvgils Some example .wav files are available here now:https://github.com/floripasat/grs/tree/master/samples.

[janvgils]

@mgm8 Thanks, can you share some details, are these raw IQ? What is the sample rate, I tried to replay them in GQRX but it didn't work.

I tried the following: device="file=beacon_gqrx_20190429_214831_145900000.wav,freq=145.9e6,rate=48e3,repeat=true,throttle=true"

[mgm8]

@janvgils these .wav files are recordings from GQRX (using a RTL-SDR) captured during the development of the satellite in our lab. These are not raw IQ, it is the output signal after the NFM demodulator of GQRX. The sample rate is 48 kHz and the data format is 32-bit float.

For example, opening the beacon file using Audacity, you can see the waveform of the baseband signal transmitted by the satellite:

You can also see the content of the packets by opening these .wav files on our software and pressing the "play" button:

[janvgils]

Thank you for taking the time to explain this, I will test the setup with these files.

All the best.