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Finite-difference time-domain (FDTD) method has been widely used in the calculation of lightning generated electromagnetic fields, and the length of lightning discharge channel is usually set to be 2500~3000m according to the height of cloud layer, this is rather time consuming. In order to save the computation time, we shorten the channel length to 1000m, calculate the electric and magnetic fields...
In this paper, the lightning-generated electromagnetic fields over lossy ground produced by lightning strikes either to flat ground or to rugged terrain are calculated using the 2-D finite-difference time-domain (FDTD) method. In order to find the changing trend of vertical electric fields induced by lightning strike with different height and gradient of rugged terrain, we set the height to 40m, 60m,...
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