TheRealKuni

LIDAR certainly has enough distance (airplanes use it too)

As I understand it, this is uncommon and mostly used for topological mapping.

Most commercial aircraft use a radar, augmented with a GPS-based terrain map, for their ground proximity warning (EGPWS, “Enhanced Ground Proximity Warning System”).

I could be wrong though, I’m not a pilot.

More accurately at conception everyone is sexless. No one has reproductive organs at conception.