"all of them are tagged with transponders" seems like a very dangerous assumption to base a system on.
It's not only a dangerous assumption, it's simply incorrect. Transponders on aircraft are not required in most of the US, including around Class D towered airports unless operating within a designated Mode C veil or at/above 10,000 feet MSL.
alt Hacker News
It's not only a dangerous assumption, it's simply incorrect. Transponders on aircraft are not required in most of the US, including around Class D towered airports unless operating within a designated Mode C veil or at/above 10,000 feet MSL.