Started SatNOGS client.
satnogsclient - ERROR - SATNOGS_STATION_LAT not configured but required
satnogsclient - ERROR - SATNOGS_STATION_LON not configured but required
satnogsclient - ERROR - SATNOGS_STATION_LAT not configured
satnogsclient - ERROR - SATNOGS_STATION_LON not configured
satnogsclient - ERROR - Settings are invalid, exiting…
satnogs-client.service: Main process exited, code=exited, status=255/EXCEPTION
satnogs-client.service: Failed with result ‘exit-code’.
satnogs-client.service: Service RestartSec=100ms expired, scheduling restart.
satnogs-client.service: Scheduled restart job, restart counter is at 52.
Stopped SatNOGS client.
Please run sudo satnogs-setup, then go to Advanced -> Support, and past the output from that here. That will show us what settings you may or may not have set.
First up, latitude and longitude must be entered as decimal degrees (which you have done), but as positive or negative numbers (not S/E as you have done). South latitude should be negative, west longitude should be negative, so in your case, latitude should be -1.914 , longitude 100.878.
First up, what kind of RTLSDR dongle are you using?
Does it have a TCXO (Temperature Compensated Crystal Oscillator), or is it just a standard crystal? If it is the latter, setting a ppm offset may not help as this kind of RTLSDR often drifts badly with temperature.
Based on the waterfall, your receiver appears to be high in frequency by about 8 kHz. Given the centre frequency is meant to be on 137.912 MHz, the PPM offset an be given by ((f + 8000)/f - 1)*1e6, where f is 137912000 Hz. This gives a PPM offset of 58 ppm. This is fairly high for most TCXO-based RTLSDRs. The RTLSDR v3 usually has a PPM offset of around 1ppm (not worth worrying about).
This can be entered using sudo satnogs-setup, in the Advanced -> Radio -> SATNOGS_PPM_OFFSET setting. I’m unsure if the correction should be entered as 58 or -58 however. Try one, check an observation, then try the other if it’s gone even further off frequency!
“Blue one” doesn’t really tell me much about what kind of SDR it is. If it has a TCXO inside, it will usually be indicated on the label. Otherwise, you can crack open the case and take a look inside.
If it looks different to that, then it may have a TCXO, but I’d need a picture to be sure.
Either way, the fact that it’s 58 ppm off-frequency isn’t a good sign, and I’d recommend getting something like either the RTLSDR v3 units, or one of the TCXO RTLSDRs from Nooelec.
ok sir … but before I had a good brother what should I do for the brother that I have now… and according to the picture above how many ppm should I set. thank…
73…
I think is a good option to install rtl_tcp server.
With the server installed, you can stop satnogs service and connect to your dongle with sdrsharp. Using a well known frequency station near your home, you can adjust ppm looking at the waterfall.
To stop satnogs: sudo systemctl stop satnogs-client
To run rtl_tcp server: rtl_tcp -a 0.0.0.0
To run again satnogs: sudo systemctl start satnogs-client
Or even easier connecting to your dongle soapy server using Cubicsdr.
