激光雷达低空风切变告警算法的应用研究与分析  

Research and analysis of low-level wind shear warning algorithm in LiDAR

作　　者：赵刚 黄轩 华志强 ZHAO Gang;HUANG Xuan;HUA Zhiqiang(Meteorological Observatory,Qinghai Air Traffic Management Sub-bureau,Civil Aviation Administration of China,Xining 810000,China)

机构地区：[1]中国民航青海空管分局气象台,西宁810000

出　　处：《激光技术》2025年第2期203-209,共7页Laser Technology

摘　　要：为了比较测风激光雷达(LiDAR)上组合切变算法和区域散度算法这两种低空风切变告警算法在复杂风场的应用效果,2017-12—2023-04在典型高原机场采用国产自研测风LiDAR,对由对流系统、冷锋和动量下传3种典型天气过程造成的15次风切变实例进行识别算法的有效性对比分析。结果表明,组合切变算法和区域散度算法的低空风切变识别准确率分别为73.3%和67.7%;通过算法识别结果得到的低空风切变告警有效性可持续10 min以上;组合切变算法在小尺度低空风切变的识别上更具优势,但若遇到风场变化缓慢的对流型及冷锋型低空风切变,两种算法的识别率都不高。该研究结果对改进低空风切变告警算法有较好的参考意义。In order to compare the application effect of two low altitude wind shear alerting algorithms of combined shear algorithm and the regional divergence algorithm on wind light detection and ranging(LiDAR)in complex wind fields,15 wind shear cases caused by 3 typical weather processes of convective system,cold front,and momentum down at a typical plateau airport from 2017-12 to 2023-04 were selected for comparative analysis of the effectiveness of the recognition algorithms by using a wind LiDAR radar that is made in China.The results show that the accuracy of the combined shear algorithm and the regional divergence algorithm are 73.3%and 67.7%,respectively.The validity of low-level wind shear alarm obtained by the algorithm can last for more than 10 min.It can be seen that the combined shear algorithm is more advantageous in the identification of small-scale low-level wind shear.However,in the case of convective type and cold front type low-level wind shear with slow wind field change,the recognition rate of the two algorithms is not high.The research results of this paper have a good reference significance for equipment manufacturers to improve the low altitude wind shear alerting algorithm.

关 键 词：激光技术 低空风切变告警 测风激光雷达 组合切变算法 区域散度算法 

分 类 号：TN958.98[电子电信—信号与信息处理]