根据瑞利散射双边缘技术测风原理,模拟仿真了不同大气温度下直接探测多普勒激光测风雷达的响应函数曲线,分析了大气温度对风速测量的影响。仿真结果表明,对不同的大气温度,系统有不同的响应曲线,同时风速越大,大气温度对风速测量的影响也越大。因此在系统设计中,需要根据最大风速和风速精度要求,确定所需大气温度分布精度,在风速反演中进行温度校正。通过数值仿真的方法,获得了在不同风速和大气温度下温度误差导致的风速误差估算公式。

The response functions of direct-detection Doppler wind lidar at different atmospheric temperatures are simulated based on the principle of the Rayleigh Scattering Doppler wind lidar with the double-edge-technique. The wind speed errors induced by temperature profile changes are analyzed. It is shown that atmospheric temperatures have great impacts on the response functions,and at larger wind speed the temperature will produce greater wind speed error. In order to obtain a reasonable wind speed accuracy,the accurate temperature distribution of atmosphere is required. In this simulation,a formulation to estimate the wind speed errors at different temperatures and wind speeds caused by temperature errors is obtained.