针对已搭建的非对称空间外差光谱仪开展地基风场模拟探测研究, 验证该仪器进行中高层大气风场的探测精度水平.介绍了非对称空间外差光谱技术进行风场探测的基本原理以及研制的光谱仪基本性能参数, 设计了风速模拟装置开展风场模拟探测实验, 并对风速模拟过程中电机转速、安装机械角度、转盘半径测量值、光线入射角度等不确定因素进行了分析和计算, 该装置模拟的理论风速误差不高于1.3%, 能够满足风场模拟探测验证要求.利用该风速模拟装置并通过调节不同电机转速实验, 获得了模拟风速在34.19~78.63 m/s内的24组测量数据, 模拟覆盖了中高层大气风速范围, 对测量数据进行误差修正及风速反演处理, 非对称空间外差光谱仪实测风速结果与理论模拟风速对比后得出了风速误差标准差3.28 m/s的风速探测精度, 有效验证了非对称空间外差光谱技术开展风场探测具有相位灵敏, 精度高等特点.

In order to verify the accuracy level of the wind field in the middle and upper atmosphere, the simulation of the ground wind field is carried out by the asymmetrical spatial heterodyne spectrometer. The basic principle of wind field detection by asymmetric spatial heterodyne spectroscopy and the basic performance parameters of the developed spectrometer are introduced. The wind field simulation detection experiment is designed by the wind speed simulation device, and the inaccuracy of the motor speed, the installation mechanical angle, the measuring value of the radius of the turntable and the angle of the ray incident during the simulation of wind speed are also introduced. The theoretical wind speed error of the device is no more than 1.3%, which is able to meet the requirements of wind field simulation detection and verification. By using the wind speed simulation device and adjusting the speed experiment of different motor, the data of 24 sets of measured results of simulated wind speed in 34.19~78.63 m/s are obtained. The simulation covers the range of wind speed in middle and upper atmosphere, error correction and wind velocity inversion for the measured data, and the results of wind velocity measured by the asymmetric spatial heterodyne spectrometer and the results of wind velocity measurement. The accuracy of wind velocity detection by 3.28 m/s of standard deviation of wind speed error is obtained after theoretical simulation of wind velocity comparison. It is proved that asymmetric spatial heterodyne spectroscopy has the characteristics of high phase sensitivity and high precision.