Airport Surface Detection Equipment, Model X, or ASDE-X, is a crucial tool designed to enhance runway safety. It helps air traffic controllers spot potential runway conflicts by offering detailed coverage of movements on runways and taxiways. ASDE-X gathers data from various sources to track vehicles and aircraft on airport surfaces. It also collects identification information from aircraft transponders. The data comes from surface movement radar positioned on the air traffic control tower or a remote tower, multilateration sensors, Automatic Dependent Surveillance Broadcast (ADS-B) sensors, and the terminal automation system.
By combining this information, ASDE-X can accurately determine the location and identity of aircraft and transponder-equipped vehicles in the airport movement area. It can even track aircraft flying within five miles of the airport. Controllers in the tower view this data through a color display that shows aircraft and vehicle positions on a map of the airport’s runways, taxiways, and approach corridors. This system continuously updates the airport movement area map, allowing controllers to identify potential collisions effectively.
This technology is particularly beneficial for controllers during nighttime or adverse weather conditions when visibility is limited. An added feature, ASDE-X Safety Logic (AXSL), enhances situational awareness for air traffic controllers. AXSL analyzes surveillance data from ASDE-X to assess whether the current or expected positions and movements of tracked aircraft or vehicles could lead to a collision. Controllers receive visual and audible alerts containing essential information about the targets, including aircraft identification and their locations on the surface.
