Oct 252021
A few weeks ago an aircraft flying of San Diego was filmed scanned the ground below using a green laser (lidar) system. Typically topographic scans are done in daylight using infra-red lidar systems; the human eye can’t see those and they go un-noticed. But green lasers are used to scan the bottoms of water, such as ponds, lakes and rivers. And green lasers are visible and doubtless kinda freaky.
Sadly I could not find this video on YouTube or some other embeddable form, but it’s viewable easy enough on Reddit.
Mysterious plane scanning San Diego Mission Beach yesterday.