Hello,
I've been running FR24 feed on a Raspberry-pi with FR24 latest SD img for three months now (T-LFPN38). Everything is working fine except that I notice brutal variations in ADS-B messages numbers received and aircrafts locations range. Everything can be normal for 3 or 4 days, and suddenly the problem appears several times in the same day. The problem sometimes corrects itself but generally I have to unplug and replug the antenna to restore a normal situation. I tried different antennas and several DVB-T keys, but the problem also occurs. I also tried to fix the gain (--gain 49.6 instead of -10.0), but without more success.
Some graphs to illustrate the problem:
- Number of planes uploaded
nbplanes_uploaded-day.png
- Live max range by polar sectors (cumulative graphs, N, NE, E...)
fr24__live_distances-day.png
- When the problem occurs...
fr24_01.jpg
- Just after unplugging and replugging in the antenna, back to normal...
fr24_02.jpg
Current configuration:
- Raspberry Pi 3 Model B+ with 2,5A power supply
- RTL-SDR.com V3 DVB-T stick (also tried Andoer Mini Portable Digital USB 2.0 TV Stick DVB-T and NooElec NESDR Mini 2+ 0,5 PPM TCXO RTL-SDR)
- 6m (~20feet) LMR400 50 ohms coaxial cable
- classic FlightAware 1090 MHz ADS-B Antenna - 66cm (26in)
- 7m (23feet) roof mounted antenna
- FR24 Raspberry-pi latest SD img
- dump1090 settings : /usr/bin/dump1090-mutability --gain -10.0 --oversample --phase-enhance --raw --mlat --write-json /run/dump1090-mutability/
Have you ever encountered this behavior?
Thank you in advance for your help.
Regards, Philippe.
I've been running FR24 feed on a Raspberry-pi with FR24 latest SD img for three months now (T-LFPN38). Everything is working fine except that I notice brutal variations in ADS-B messages numbers received and aircrafts locations range. Everything can be normal for 3 or 4 days, and suddenly the problem appears several times in the same day. The problem sometimes corrects itself but generally I have to unplug and replug the antenna to restore a normal situation. I tried different antennas and several DVB-T keys, but the problem also occurs. I also tried to fix the gain (--gain 49.6 instead of -10.0), but without more success.
Some graphs to illustrate the problem:
- Number of planes uploaded
nbplanes_uploaded-day.png
- Live max range by polar sectors (cumulative graphs, N, NE, E...)
fr24__live_distances-day.png
- When the problem occurs...
fr24_01.jpg
- Just after unplugging and replugging in the antenna, back to normal...
fr24_02.jpg
Current configuration:
- Raspberry Pi 3 Model B+ with 2,5A power supply
- RTL-SDR.com V3 DVB-T stick (also tried Andoer Mini Portable Digital USB 2.0 TV Stick DVB-T and NooElec NESDR Mini 2+ 0,5 PPM TCXO RTL-SDR)
- 6m (~20feet) LMR400 50 ohms coaxial cable
- classic FlightAware 1090 MHz ADS-B Antenna - 66cm (26in)
- 7m (23feet) roof mounted antenna
- FR24 Raspberry-pi latest SD img
- dump1090 settings : /usr/bin/dump1090-mutability --gain -10.0 --oversample --phase-enhance --raw --mlat --write-json /run/dump1090-mutability/
Have you ever encountered this behavior?
Thank you in advance for your help.
Regards, Philippe.
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