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Air Traffic Control Technology

In the early 21st century, the major air traffic control technology was the Automated Radar Terminal System (ARTS), a sophisticated radar system to control approaching and departing aircraft that are within 5 to 50 miles of an airport.

Beacon System
- An air traffic control radar beacon system allows controllers to learn specific details about an aircraft that is being monitored. A transponder installed in the aircraft communicates with a surveillance antenna on the ground, identifying each aircraft and giving speed and position information.
Computer Terminals
- ARTS, the computer system used by air traffic controllers, performs a complete sweep every six to 12 seconds, giving the controller the range and the azimuth of a target.
TRACON
- The Federal Aviation Administration (FAA) operates regional air traffic control facilities, called TRACONs (Terminal Radar Approach Control), which monitor aircraft and communicate with the pilots to guide them. A TRACON will guide an aircraft that is approaching an airport until it is within 5 miles and below 2,500 feet, at which point responsibility is handed over to the airport tower controllers.
GPS
- In 2009, the FAA began considering phasing out radar systems in favor of Global Positioning System satellite technology, called NextGen, which could provide more accurate, real-time information.

Aviation