I suggest for test 1:
- Increase LoRa air data rate to 18.23 kb/s
Then, for longer range communication, I suggest for test 2:
- base RTCM3 message settings:
- 1002 1Hz
- 1006 0.1Hz
- 1010 1Hz
- 1107 OFF
- base and rover LoRa air data rate:
- 4.56 kb/s
Try those changes and let us know your result.
If good, . If bad, please upload log files again.