Why do radars spin?

Part of this beam of energy bounces back and is measured by the radar, providing information about the object. Radar can measure precipitation size, quantity, speed and direction of movement, within about 100 mile radius of its location .

Why do Radars Spin? Radar dishes spin to enable them to scan a wide area with greater focus by moving the position of the target being scanned . They also have different scanning modes that can be used depending on what they are tracking, whether stationary objects or moving ones.

Doppler radar cannot detect humans who are stationary or walking across the radar’s field of view . The radar can only detect the motion components that are directed towards to or away from the radar.