What is the main function of radar?

1, used for tracking and positioning equipment such as cars and mobile phones.

2. Used for receiving signals, such as satellite TV.

3, used for environmental monitoring, weather forecasting, etc.

The radar beam is larger than the laser beam (ray), so it is easy to capture the target without precise aiming. Radar speed measuring equipment can be installed on patrol cars, and detecting the driving speed is a very important part of "mobile electronic police".

Extended data:

The appearance of radar was due to the war between Britain and Germany during World War I, and Britain urgently needed a radar (technology) that could detect metal objects in the air and help search for German aircraft in anti-air strikes. During World War II, radar technology with the functions of ground-to-air, air-to-ground (search) bombing, air-to-air (interception) fire control and friend or foe identification appeared.

After World War II, radar developed new radar systems, such as monopulse angle tracking, pulse Doppler signal processing, high-resolution synthetic aperture and pulse compression, friend-or-foe identification combined system, computer automatic fire control system, terrain avoidance and terrain following, passive or active phased array, frequency agility and multi-target detection and tracking.