多普勒测风激光雷达风廓线探测精度对比分析

Comparative analysis of wind profile detection accuracy of Doppler wind lidar

摘要:

在晴空干洁的大气条件下，多普勒测风激光雷达能够以较高的时间、空间分辨率，获得大气三维风场信息。为验证北京遥测技术研究所研制的WINDLE LIDAR型多普勒测风激光雷达探测的准确性，2020年4月~5月，用该雷达在北京市南郊观象台和L波段探空雷达进行同时同址对比观测。2022年6月~7月，用该雷达与北京遥测技术研究所的WINDLE U7相干测风激光雷达进行同时同址对比观测。通过对数据进行相关性分析，得到比对结果如下：1）垂直探测距离大于5 km，最大探测高度可达8.5 km；2）与L波段探空雷达对比，风速和风向数据拟合总相关系数分别为0.990和0.998。总体风速和风向的系统偏差、标准偏差分别为0.114 m/s和3.078°、0.489 m/s和3.969°，二者具有较好的一致性；3）与WINDLE U7雷达对比，风速和风向数据拟合总相关系数分别为0.999和0.999。总体风速和风向的系统偏差和标准偏差分别为0.209 m/s和1.077°、0.255 m/s和1.220°，可以看出该雷达系统的优越性。

Abstract:

Doppler wind lidar can obtain three-dimensional wind field information with high temporal and spatial resolution in clear and clean atmosphere. In order to verify the detection accuracy of the WINDLE LIDAR coherent Doppler wind lidar developed by Beijing Research Institute of Telemetry, from April to May, 2020, the lidar and L-band sounding radar were used for synchronous comparative observation at the Southern Suburb Observation of Beijing.From June to July, 2022, this lidar is compared with WINDLE U7 lidar of Beijing Research Institute of Telemetry at the same site.Through the correlation analysis of the data, the comparison results are as follows：1）The vertical detection distance is greater than 5 km and the maximum detection height is 8.5 km. 2）Compared with L-band sounding radar, the total correlation coefficients of wind speed and direction data fitting are 0.990 and 0.998 respectively. The system deviation and standard deviation of the overall wind speed and direction are 0.114 m/s and 3.078°, 0.489 m/s and 3.969° respectively, which have good consistency. 3）Compared with WINDLE U7, the total correlation coefficients of wind speed and direction data fitting are 0.999 and 0.999. The system deviation and standard deviation of the overall wind speed and direction are 0.209 m/s and 1.077°, 0.255 m/s and 1.220° respectively. The superiority of the lidar system can be seen.