The Detection Performance of Different Wind Lidar

Abstract

Wind lidar can quickly detect wind profiles, which compensate for the shortcoming of the conventional sounding observation in high temporal and spatial resolution. Thus, it is very useful in the field of meteorology, wind power and aerospace. At present, various types of wind lidars measurement equipment are developed rapidly in China. To verify their detection performance, the synchronous observation data of three-type wind lidars were analyzed at Hangzhou National Reference Climate Station from January 16 to February 20, 2019, using the data of sounding observation and L-band stationary wind profiler as the reference. The results reveal that the median of the detected range is 1000-1500 m, but the data acquisition rates of threetype wind lidars show strongly difference at the height of 1000 m, with the value of 93%, 52%, 74%, respectively. The precipitation has an obvious influence on the detected range, which decreases by more than 50 %. The wind speed has a good relationship between wind lidar and L-band stationary wind profiler, with the correlation coefficient higher than 0.75 under the height of 2000 m, and the wind speed deviation is less than 1.5 m/s. Moreover, the wind direction angle deviation decreases with the increase of altitude, from 28 ° to 10 ° below the height of 1500 m. Compared with the sounding observation, the wind speed correlation of the three-type wind lidars is greater than 0.9, while the wind speed deviation is less than 1.0 m/s, and the wind direction angle deviation mainly decreases with the increase of altitude, with the value basically lower than 25 °. Furthermore, above the height of 600 m, the wind direction angle deviation between three-type wind lidars and the sounding observation has a better performance, with the value less than 15 °. These results can provide some technical and scientific reference for the reliable observation data of wind lidar.