Abstract: Based on the ground data, wind lidar data, wind profile radar data, and Guangzhou S-band dual polarization radar data from the Guangzhou mega city comprehensive observation experiment in June and July 2019, the WindPrintS4000 wind lidar and wind profile radar were observed and compared, and the detection performance of the wind lidar was comprehensively evaluated and analyzed under different precipitation intensity conditions. The results show that the observation performance of wind lidar and wind profile radar is consistent in non precipitation and non heavy precipitation periods, and can capture the characteristics of low-level wind field changes in the boundary layer during the transit of weather systems. However, compared with other methods, the wind lidar has lower cost, is more convenient and efficient, and is easier to select sites, which is more in line with the needs of dense observation network in mega cities; The detection height ofwind lidar is related to both precipitation and precipitation intensity, but it is more closely related to precipitation intensity. As precipitation intensity increases, the detection height of wind lidar generally shows a downward trend. Moreover, when the reflectivity factor of S-band dual polarization weather radar reaches over 50 dbz intensity of precipitation, wind lidar cannot perform routine observations like wind profile radar.

Key words: wind lidar, wind profiler radar, detection performance