Modeling and Analyzing of ELF/SLF Electromagnetic Wave Propagation by Using FDTD and GIS

This paper initially combined the three-dimensional finite difference time-domain（3D-FDTD） method with the Geographic Information System（GIS）,to simulate the radiation of the electromagnetic（EM） wave of ELF/SLF in the flashing lightning and the Schumann resonance in the Earth-ionosphere waveguide system.When the source was located in the high altitude zone,it was found that the resonant frequencies and the theoretical values of the Schumann resonance were quite close,and the EM wave travelled the observation point several times round the Earth-ionosphere waveguide system before vanishing.We also found the GIS had great influence on the distribution of the surface electric field,however,the magnetic field were not effected