雷达

RADAR

Radar, meaning "radio detection and ranging", refers to the use of radio methods to detect targets and determine their spatial positions. Therefore, radar is also known as "radio positioning". Radar is an electronic device that uses electromagnetic waves to detect targets. Radar emits electromagnetic waves to illuminate targets and receives their echoes, thereby obtaining information such as the distance, distance change rate (radial velocity), azimuth, and altitude from the target to the electromagnetic wave emission point.