I’ve recently installed a SatNOGS station Guatemala (first station in the country!) and am currently in the Testing phase. I am yet to improve the performance of my antenna, but have been able to receive faint signals from some birds.
I am noticing something slightly odd, that the frequency correction seems to be not exactly on point. Things I have checked:
- Checked and double checked for correct Lat, Lon and Altitude configuration
SATNOGS_PPM_ERRORis set to 40 for my Nooelec NESDR Mini 2. I have used this value before for good performance.
Only thing I can think might be the problem, is that the PPM seems to vary depending on how long the RTL-SDR has been sampling. Say, if I just started sampling, PPM is about 36, and as time passes (and the SDR gets hotter) it stabilizes around 40. Could this be an issue?
P.S. Here’s a screenshot of the waterfall for GOMX-1, note how it drifts to the left: