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基于机场上空的低空小尺度天气系统风场结构以及单多普勒激光雷达测风原理,对已有变分同化方法和涡度-散度风场反演方法进行改进,利用变分同化方法对由单多普勒激光雷达所测的径向风速进行同化,预报它在未来时序时的估计值,再利用改进的涡度-散度方法对预报的径向风速进行反演,实现对三维风场的反演,从而成功实现对风场的预报。最后,通过对机场上空的天气结构仿真,分析了这种方法对径向风速实现的三维风场的预报的优缺点及其误差。
Based on the wind field structure of the low-altitude and small-scale weather system over the airport and the wind measurement principle of single-Doppler lidar, the existing variational assimilation method and the vorticity-divergence wind field inversion method are improved. Variational assimilation method Radial wind velocity measured by single Doppler lidar is assimilated to forecast its estimated value in the future time series. Then, the improved radial-wind velocity is inverted by using the improved vorticity-divergence method, Field inversion, so as to successfully forecast the wind field. Finally, through the simulation of the weather structure over the airport, the advantages and disadvantages of the method for forecasting the three-dimensional wind field achieved by radial wind speed and its errors are analyzed.