One of the major advantages of the Iris system is being able to deal with other aircraft in the national airspace (especially non-cooperative targets like you m

One of the major advantages of the Iris system is being able to deal with other aircraft in the national airspace (especially non-cooperative targets like you mention). It means that any system that will actually be useful will have to be able to see and track objects correctly further than 500m away, like Iris can.