I’ve been having some issues with an experimental ground station and trying to troubleshoot the problem. This afternoon I’ve carried out some manual observations to compare between the experimental ground station and the main ground station, however I’ve noticed that when I run these observations, and listen to the subsequent ogg file created, the signal I’m tuned to is present for 2 seconds before it disappears. I’ve uploaded a picture of the spectrograms from the two ground stations below. I appreciate the signal in the bottom track is weaker and slightly more difficult to see but I hope it explains what I’m trying to describe.
The command I’m using to generate these files is
satnogs_fm.py --soapy-rx-device="driver=rtlsdr" --antenna=RX --samp-rate-rx=2.048e6 --rx-freq=95500000 --gain=44.5 --file-path=./audio-out.ogg --waterfall-file-path=./waterfall.dat
Am I missing something? Any help would be greatly appreciated.