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海-陆混合路径对雷电电磁场传播的影响

, PP. 229-235

Keywords: 海-陆混合路径,地闪回击,电磁场,频谱

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Abstract:

利用Barrick等效表面阻抗法和Wait近似算法等研究了粗糙海-陆混合路径对雷电电磁场传播的影响。结果表明,当雷电发生在海面,电磁辐射场沿海-陆混合路径传播时,即使在陆地部分的传播长度仅为几十米,对2MHz以上甚高频的衰减也不容忽视,陆地部分对电磁场传播的影响远远大于海面。因此,利用海面对雷电电磁波谱进行测量,需要考虑海-陆混合路径传播的影响。如果关注的频率超过10MHz,还需要考虑海浪的影响。

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