What does ADS-B rely on to function?

ADS-B, or Automatic Dependent Surveillance–Broadcast, is a surveillance technology that relies specifically on GPS-derived positions to function effectively. This system enhances situational awareness by allowing aircraft to determine their precise position using GPS data. Once the aircraft computes its position and other relevant information such as velocity and altitude, it broadcasts this data at regular intervals to ground stations and other aircraft.

This reliance on GPS allows for a high level of accuracy in tracking aircraft, which contributes significantly to the safety and efficiency of air traffic management. The use of GPS also means that ADS-B can provide real-time updates regardless of traditional radar coverage, which is particularly advantageous in remote areas where radar may not be available.

Other methods, such as radar signals or manual inputs, do not provide the same level of automation or continuous data updates as ADS-B does through its GPS reliance, making GPS-derived positions a fundamental component of the system's functionality.