CTO & co-founder of The Things Network here! I've been working with LoRa for over eight years now, and I keep getting surprised by measurements like this. What started off as "line of sight works" went to a successful "LoRa moon bounce" [0] and now a sea level reception over 830 miles.

So, any physics people here care to comment how this works? Is this pure atmospheric refraction or is there something else?

[0] https://www.camras.nl/en/blog/2021/first-lora-message-bounce...