Air traffic control relies on a combination of systems, technologies, and procedures to keep the skies safe. The primary technology used in Air Traffic Control is radar, which is used to track the movement of aircraft. Radar works by sending out a radio signal that bounces off an aircraft and returns to the radar antenna. By measuring the time it takes for the signal to return, controllers can determine the distance between the radar and the aircraft.
Another important technology used in air traffic control is the automatic dependent surveillance-broadcast (ADS-B) system. ADS-B is a surveillance technology that uses GPS to provide accurate information on the position, altitude, and velocity of aircraft. This information is then transmitted to air traffic controllers, who use it to track and manage the movement of aircraft. Approach controllers manage the airspace surrounding an airport and guide planes to their final approach for landing. En-route controllers monitor aircraft flying at high altitudes and guide them through the airspace between airports.
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