Dupe of "I built a system that takes pictures of all the airplanes that fly over my house" (although it's an imperfect link) 276pts, 73 comments<p>[0]: <a href="https://news.ycombinator.com/item?id=30039597" rel="nofollow">https://news.ycombinator.com/item?id=30039597</a>
I was thinking about building a laser system that writes on the cloud deck on a night with stratus clouds and how it could use a subsystem that watches ads-b and makes sure it never lases a plane. (I don’t live too far from an airport.)