Comment by golem14
9 hours ago
How trivial is it, really? These are spread spectrum devices that could have very sparse duty cycles. If you sending only millisecond bursts a couple of times an hour, for telemetry and whatnot, it would seem pretty hard to get a good fix, especially when moving. I haven't analyzed lora traffic, so just talking out of my ass.
LoRa uses chirping which are much longer than milliseconds. You can clearly see them in a spectrum display. It's a very slow protocol. Not as slow as WISPR or JT8 but still slow. The flip side is that it's robust (the chirping provides a lot of interference protection against fixed-frequency interference for example)
With a couple of GPS-synchronized receivers stationed in an area, child's play. LoRA airtime is extraordinarily long for common spreading factors.
Sdrs are super cheap these days. It wouldn't be hard.
Note: did things in .mil