What radar is used in foggy days?

Lidar for foggy days. According to relevant public information, the radar technology used in smog weather is lidar, which is a technology that emits laser beams, receives reflected light and detects the concentration, size and distribution of particulate matter in the atmosphere. Lidar can measure the reflection intensity, scattering angle and flight time of particles, provide high-precision air quality monitoring data, identify the types of particles, and thus better evaluate the degree of air pollution.