Abstract
In this paper, an inverse procedure algorithm is proposed in the time domain to evaluate lightning return stroke currents along a lightning channel using measured magnetic ∞ux density at an observation point while the current velocity along a lightning channel is assumed to be a height dependent variable. The proposed method considers all fleld components and it can evaluate the full shape of currents and the current velocity at difierent heights along a lightning channel. Moreover, a sample of measured magnetic ∞ux density from a triggered lightning experiment is applied to the proposed algorithm and the evaluated currents and current velocities are validated using a measured channel base current and magnetic ∞ux density at another observation point.
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