Anyone keeping raw IQ, or Doppler-vs-time, from their observations?

SatNOGS
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Hi all. I’m poking at orbit determination from a single ground station, how much one station’s Doppler and timing actually pin down an orbit, and how well predicted passes line up with what the station really saw. I’d much rather do this on real SatNOGS observatins than on synthetic data.

Does anyone keep the raw IQ (or audio with the exact start time and sample rate)? I know the client throws it away by default.
Is the Doppler curve stored as numbers anywhere, or is the watrfall PNG all there is?
For pulling a few hundred observations plus the TLE each was predicted with, is there a bulk route you’d rather I use than paging the API?

I’m glad to post back a predicted-vs-observed AOS/LOS/max elevation comparison per station if that’s useful to anyone.

Thanks. If this is already covered somewhere, just point me at it.

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Yes, all my stations save raw IQ and I store these for 45 days.

The files are saved with the help of a SatNOGS post script, here an example IQ save function.

SATNOGS_POST_OBSERVATION_SCRIPT="satnogs-post {{ID}} {{FREQ}} {{TLE}} {{TIMESTAMP}} {{BAUD}} {{SCRIPT_NAME}}"

The files are saved as iq_15033219_435950000_48000.raw.zip (id_obsid_center-frequency_sample-rate.raw.zip)

The waterfall information is also saved as Artifact hdf5 format by my stations it is also available for this IQ 15033219 example, look at the left bottom corner.

Have a good look and make sure you meet the requirements.

Jan | PE0SAT

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okay seen interesting. try post here . thank you.

if you want test your project with my observation, i upload the iq file to cloud here

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You can find IQ-Data from our stations BEEGND-1 and BEEGND-4 here:

For BEEGND-1 you should check the observation status in the network, as not all obs are successful. For BEEGND-4 there were more successful observations.

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Thank you all

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