Which technology is associated with radio detection and ranging?

Radio detection and ranging, commonly known as radar, utilizes radio waves to determine the distance and direction of objects. Primary Surveillance Radar (PSR) is specifically designed for this purpose, as it emits radio waves that bounce off aircraft and return to the radar system. This allows air traffic controllers to detect the presence, altitude, and flight paths of aircraft, which is crucial for maintaining safety and situational awareness in the skies.

Other technologies mentioned, like Automatic Dependent Surveillance-Broadcast (ADS-B), utilize different principles such as satellite-based systems for tracking aircraft, which do not primarily involve the same radar principles as PSR. Multilateration (MLAT) relies on measuring the time it takes for signals to travel from an aircraft to multiple ground stations, which is another distinct process. The Surface Movement Guidance and Control System (SMGCS) focuses on monitoring and controlling surface traffic at airports rather than the detection of airborne objects. Consequently, PSR stands out as the definitive technology related directly to radio detection and ranging.