The time domain expression of the lightning electromagnetic fields (LEMF) contains multiple integration processes, and the direct solution tends to take up a lot of calculation time. In this paper, the structure of the time domain expression of the LEMF is analyzed, the idea that using the matrix pencil method to realize the fast evaluation of the LEMF is proposed, and the feasibility of this method for calculating the LEMF is discussed. Besides, several numerical examples are given to prove the efficiency and correctness of the proposed method when the parameters of the observation point and ground are varied.

中文翻译：

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基于时域矩阵笔法的雷电电磁场快速评估

雷电电磁场（LEMF）的时域表达式包含多个积分过程，直接解往往会占用大量的计算时间。本文分析了LEMF的时域表达式的结构，提出了使用矩阵笔法实现LEMF的快速评估的思想，并讨论了该方法计算LEMF的可行性。此外，通过数值算例证明了该方法在观测点和地面参数变化时的有效性和正确性。