dave-in-nj:
I have read about, but have no feel for LoRa, but it seems to be able to work for kliometers.anyone know if it can be triangulated ? seems a LoRa sender could be used to pulse out a signal every so often and then allow you to triangulate it's postion ?
Triangulation by signal strength comes up in here often, from ground to high altitude balloon is one situation where it might work since there is usually very good line of sight between ground the the transmitter.
However there is no real need to use traingulation at all, just put a GPS on the tracker and get the accurate location back in anycase.
LoRa balloon tracker can be very simple, see below. The full distance capability of LoRa trackers is yet to be discovered, the current recors stands at 702km from a balloon to a TTN\LoRaWAN node , 868Mhz, 25mW.
You can use the same board as the receiver to.