Radar technology, which stands for radio detection and ranging, has been around for several decades and has a wide range of real-world applications. Radar is currently used to detect targets or other objects in many settings. For instance, it is employed during military and aerospace operations to determine the location, range, angle and/or velocity of aircrafts, ships, spacecrafts, missiles or other vehicles.
Source:
https://phys.org/news/2020-06-quantum-metrology-protocol-noncooperative-d.html