aaday3
commented
2 weeks ago Changed spreading factor to 8 to get better time on air (from 493.56 to 156.14ms) while keeping link budget above 140 (its 142.5 dB), RSSI for spreading factor 8 was ~ -65, spreading factor 10 was ~ -50
For max link budget (153.0 dB) use spreading factor 12 and coding rate4 to 5. (Time is 1.32s) RSSI not recorded yet
There are many parameters that we can change on the LORA: as seen here.
They each have different characteristics, different datarates and sensitivity to noise.
We change the parameters here, and it might be possible to change the parameters depending on the state of flight and the amount of data that we need to be transmitted at.
It might also be worth it to bring an SDR to each launch to see the spectrum that we are on, and how much interference that we are receiving. We can lower the bandwidth which makes us stand out from the noise, or increase it which makes us more resistant interference from other devices.