A field-based inverse algorithm for the identification of different heightlightning return strokes

An identification procedure for lightning return strokes is proposed It mak es it possible to reconstruct the return stroke height-dependent attenuatio n function making use only of the measured vertical component of the electr ic field radiated by the lightning channel and it can be performed without any information about the channel base current, the measurement of which is generally very difficult and noisy. It is also shown that the method with suitable modifications, can also be employed for the mathematical evaluatio n of the lightning channel height, which is a physical quantity a priori un known. The approach has been validated by means of the numerical simulation of classical TL MTLL and MTLE engineering models for a wide class of retur n strokes, with height ranging in the interval 15-30km.