Originally Posted by
El Bunto
Formal system analysis only follows when viable technical measures have been identified. People chipping-in with 'solutions' aren't seriously proposing an implementation, they're at the ideation stage. Calm down.
Modern airport surface radar implementations can already identify and track unidentified airborne objects with resolution <= 5cm. They certainly aren't being phased-out, precisely because they provide surveillance of non-cooperative objects.
You need to read about UTM and U-space These are at implementation stage in the US and Europe respectively - without any systems analysis.