基于小尺度天气结构风场反演和变分同化方法理论,分析了平滑罚函数在变分同化方法中的作用,通过模拟它在不同多普勒雷达观测数据误差时的变化,总结了平滑罚因子在整个反演过程中的作用。得出结论,对小尺度天气结构,平滑罚因子可以提高数据反演的精度,而且选择适当的平滑罚因子对提高反演质量有明显的作用,可以很好地应用于真实测量数据的反演,并给出确定平滑罚因子的一般算法。 Based on the wind field inversion and variational assimilation method theory of small scale weather structure, the function of smoothing penalty function in variational assimilation method is analyzed. By simulating the variation of the error function in different Doppler radar observations, the smooth penalty The role of factors in the entire inversion process. It is concluded that for small-scale weather structures, the smoothing penalty factor can improve the accuracy of the data inversion, and the appropriate smoothing penalty factor has a significant effect on improving the quality of inversion and can be well applied to the inversion of the real measured data , And gives a general algorithm to determine smoothing penalty factors.