R. D Elbourn has written:

'Simulation of air traffic control radar beacon code assignment plans' -- subject(s): Mathematical models, Air traffic control, Air traffic control simulators

Air Traffic Control Use Radar Radio Detection and Ranging to track aircraft! Air Traffic Control Use Radar Radio Detection and Ranging to track aircraft!

Air Traffic Control radar service is typically terminated once an aircraft exits controlled airspace or when the service is no longer needed, such as after landing at an airport. Pilots will be advised by controllers when radar service is being terminated.

That depends on the particular radar system.

A simple speed radar used by law enforcement can simply be held and pointed at a target to determine the speed of the target.

A more complex system like an air traffic control radar system would have display consoles for the radar operator to view the data.

some use a system called TCAS (Traffic Collision Avoidance System), but others have to rely on the ATC (Air Traffic Control).