I'm (naively) surprised this works in practice. It seems like the sending laser and receiver would have to be very immovable such that big wind gusts, or a lar

I'm (naively) surprised this works in practice. It seems like the sending laser and receiver would have to be very immovable such that big wind gusts, or a large truck driving by, or large temperature changes in the structure holding the laser, etc, didn't cause enough vibration/movement to cause the laser to miss its target when several miles away. Is this a non-issue? Or maybe the laser spreads out enough at several miles it compensates for the movement?