Airport Surface Detection System – Model X (ASDE-X) is a surveillance system using radar and satellite technology that allows air traffic controllers to track surface movement of aircraft and vehicles. It was developed to help reduce critical Category A and B runway incursions.
ASDE-X enables air traffic controllers to detect potential runway conflicts by providing detailed coverage of movement on runways and taxiways. By collecting data from a variety of sources, ASDE-X is able to track vehicles and aircraft on the airport movement area and obtain identification information from aircraft transponders.
The data that ASDE-X uses come from surface surveillance radar located on the air traffic control tower or remote tower, multilateration sensors, ADS-B (Automatic Dependent Surveillance-Broadcast) sensors, the terminal automation system, and from aircraft transponders. By fusing the data from these sources, ASDE-X is able to determine the position and identification of aircraft and transponder-equipped vehicles on the airport movement area, as well as of aircraft flying within five miles of the airport.
Controllers in the tower see this information presented as a color display of aircraft and vehicle positions overlaid on a map of the airport’s runways/taxiways and approach corridors. The system essentially creates a continuously updated map of the airport movement area that controllers can use to spot potential collisions. It will be especially helpful to controllers at night or in bad weather when visibility is poor. The FAA is in the process of enhancing ASDE-X with visual and audio alarms that will alert controllers to possible collisions.
By the end of fiscal year 2006, there were eight commissioned ASDE-X systems. Two additional systems will begin operations in fiscal year 2007, 17 systems are in various implementation stages and the FAA is expediting the deployment of ASDE-X to Chicago O’Hare International Airport. Seven more systems will begin the implementation process in fiscal year 2007.
The 35 major airports that will receive, or have already received, ASDE-X include:
Page Last Modified: 06/26/09 16:52 EDT
This page can be viewed online at: http://www.faa.gov/air_traffic/technology/asde-x/