机载多普勒激光雷达指向影响分析及定标

摘要

The radial velocity deviation and the horizontal wind accuracy from multi view retrieval are simulated and analysed with considering the characteistics of lidar measurement mode and the influence from the accuracy of flight attitude.The resluts show the wind measurement accuracy is less than 0.3 m/s under the input values in paper and disregarding the frequency discrimination error from lidar system.This is useful for the platform design of airborne li-dar and the determation of wind measurement mode.Beside these,a new method based on ground return measurement for laser pointing calibration is proposed,and the calibration accuracy is better than 0.2°through the analysis of meas-urement data of airborne doppler lidar.%通过分析机载多普勒激光雷达测量模式特征，考虑飞机姿态测量精度的影响，仿真分析了径向速度误差，以及多视线反演水平风场的反演精度，按照文中仿真系统的输入参数，不考虑雷达系统频率检测误差，风速测量误差小于0.3 m ／s。该结果为机载多普勒激光雷达平台设计和测量模式的选择提供了参考。在此基础上，提出了一种基于地面散射信号测量的激光指向定标方法，并通过激光雷达实测数据进行验证，指向定标精度优于0.2°。