I'm trying to create a High Altitude Balloon (HAB), and the main problem I have is communication with it. I have a couple of LoRa RFM9X Radios which can apparently do 20Km Range. Many sites suggest using LoRa radios to communicate with the balloon, but my issue is, I thought the maximum range for LoRa Radios was around 20Km. Is this different in the air as oppose to on the ground?
Can I increase this range in any way to maximise my range?
Does anyone have any other simple but cheap methods of communication with the balloon?