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介绍了米散射多普勒激光雷达风场探测原理,给出了自行研制的米氏散射多普勒激光雷达的结构系统。该系统与微波雷达进行实验对比,两者测量的水平风速大小和方向的廓线吻合得很好,并且得出在0.55～2.4km高度范围内,系统探测的水平风速大小和风向误差的平均值分别为1m/s和7°。给出了系统长期风场观测的典型结果,并对风场随时间的演变趋势进行了分析。结果表明,该系统测量数据可靠,可用于低对流层风场分布的常规观测及分析研究。采用PPI扫描方式得到了径向风速的空间分布图和水平风速廓线,表明系统通过改进,将有可能具备探测切变风和晴空湍流的能力。
The principle of detection of rice scattering Doppler lidar wind field is introduced, and the structure system of Mie scattering Doppler lidar developed by ourselves is given. Compared with the microwave radar, the system is in good agreement with the microwave radar, and the horizontal wind speed and the profile of the measured wind speed agree well with each other. And the average horizontal wind speed and wind direction error of the system are obtained in the range of 0.55 ~ 2.4km Respectively 1m / s and 7 °. The typical results of the long-term wind field observation are given, and the trend of the wind field over time is analyzed. The results show that the system is reliable and can be used for routine observation and analysis of the wind field distribution in the low troposphere. The spatial distribution of radial wind speed and the horizontal wind velocity profile are obtained by PPI scanning method. It is shown that the improvement of the system will make it possible to detect the shear wind and the turbulence of clear sky.