Airport radar shows air traffic controllers information on aircraft in
controlled air space, and possibly surrounding uncontrolled airspace. Air traffic
control radar (ATC radar) systems include:
Primary radar, which
uses signals scattered off the bodies of aircraft to obtain
information on their location and altitude. Primary radar is normally
available only close to major airports.
Secondary radar, or secondary surveillance
radar, which relies on interrogation of transponders carried by aircraft.
Secondary radar provides most of the radar coverage available to
an air traffic controller, and has a much longer range
than primary radar.
Other topics in our resources on Radar related to Air Traffic Control Radar include: