In this paper it is presented a simulation analysis of electric fields generated by lightning channels with tortuosity. The tortuosity of the channel is reproduced by means of a numerical algorithm that takes into account statistical characterizations made by different authors observing real lightning channels, so the macroscale tortuosity of the simulated channel is similar to the one recorded in nature. Later it is used an analytic model which allows the calculation of the electromagnetic fields generated by lightning channels with tortuous geometries, once the geometry is known. The electromagnetic fields are calculated assuming a Heaviside step function as the current traveling along the channel. The objective of this work is to develop a methodology for the calculation of electromagnetic fields, considering a more realistic geometry for the lightning channel than that of a straight and vertical one, and to analyze some characteristics of the generated fields in terms of wave peak value and wave-form for different points around the lightning channel. This methodology is pretended to be used in a future work in order to determine the effect of the lightning channel tortuosity on the location accuracy of lightning locating systems.

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