Abstract: Using the WINDCUBE 100S Doppler wind lidar (DWL) and L-band radiosonde (LRS) installed at Beijing National Basic Meteorological Observing Station, the wind measurement synchronous comparative observation test was carried out from January 1 to May 31 in 2020．Based on the time and space matching of the observation data, the data quality of wind lidar was analyzed taking L-band radiosonde data as the reference standard from three aspects, i.e., the height of the wind profile, the wind speed and the wind direction. The results show that the maximum detection height of wind lidar was not less than 2000 m in 56.5% of the observation time and less than 1000 m in 2.9% of the observation time. The two set of wind measurements from lidar and L-band radiosonde  have good consistency with each other. The total correlation coefficient of 8491 groups of matched observation data for wind direction and wind speed are 0.965 and 0.986, respectively. The mean error (ME) and root mean square error (RMSE) of overall wind direction (WD) and wind speed (WS) are −1.3◦ and 16.1◦ , 0.21 m·s −1 and 1.06 m·s −1 , respectively. Due to the weak signal-to-noise ratio of the observation data of wind lidar, the amount of reliable matching data is reduced above 2000 m altitude, which results in a negative impact on the reliability of the consistency comparison. These results can provide references for the reliability test method of wind lidar and its application in meteorological.

Key words: Doppler wind lidar, L-band radiosonde, wind speed, wind direction