I have the mod details somewhere, proba-v is interesting, it has a multi spectral imager ob board, apid274, apid282, apid290, apid298, imager, apid0101 adsb downlink.
There was an effort in #hearsat some time back to acquire the sband signals, and extract something usable. If I can get a down converter integrated into my system I am happy to monitor this to collect data.
regards,
Paul.