I have experience with VHF radio emulation, so I wanted to ask what formula you're using for ranging? I've found the haversine formula to be a robust compromis

I have experience with VHF radio emulation, so I wanted to ask what formula you're using for ranging? I've found the haversine formula to be a robust compromise between accuracy and computational complexity, where on a typical day, I'm doing 5000-200000 haversine calculations a second.