机动式激光测风雷达三维风场反演模型仿真研究  

Simulation research on 3-D wind fields calculation with mobile lidars

作　　者：单雨龙 赵世军 姬文明 SHAN YuLong;ZHAO ShiJun;JI WenMing(College of Meteorology and Oceanography,National University of Defense Technology,Changsha 410000,China)

机构地区：[1]国防科技大学气象海洋学院,长沙410000

出　　处：《地球物理学报》2023年第12期4863-4874,共12页Chinese Journal of Geophysics

摘　　要：激光测风雷达具有探测精度高、环境适应性好等优点,发展其机动式应用技术,在军事保障、抢险救灾、海洋调查等领域具有广阔应用前景.雷达在机动条件下工作时,会由于载体的运动及倾斜造成数据探测误差,且不同光束之间的实际探测仰角不一致,导致无法基于传统VAD算法反演大气三维风场.本文研究探索了激光测风雷达机动探测条件下的数据订正算法,及同一组VAD扫描中光束仰角不同条件下的三维风场反演算法,并通过数值仿真试验对算法进行验证.结果表明,数据订正算法能够有效订正载体运动带来的雷达探测误差,数据反演算法能够有效反演得到三维风场,但同一组VAD扫描中光束仰角差越大,三维风场反演误差越大.Lidar has higher detection accuracy and better environmental adaptability over traditional wind detection equipment,and developing the technology of motorized lidar has broad application prospects in many fields,such as military support,rescue and relief,marine investigation and so on.However,when lidars work during movement,the movement and inclination of lidars will cause error in the detected data.In addition,the actual elevation angles between different beams are usually different when lidars moving although the elevation angle parameter is set to be the same as each other,so the traditional VAD algorithm could not be used to calculate the 3-D wind fields.This paper studied and designed the data correction algorithm for mobile detection with lidar,and 3-D wind fields calculation algorithm under irregular VAD scanning path.At the same time,the two algorithms have been verified based on simulation experiment.Results show that the data correction algorithm can effectively correct the detection error caused by the motion of lidars;the wind fields calculation algorithm can effectively retrieve the 3-D wind field,but the elevation difference between different beams in the same VAD scanning path is normalized to the error of the calculated 3-D wind fields.

关 键 词：激光测风雷达 机动探测 数据订正 风场反演 

分 类 号：P414[天文地球—大气科学及气象学]