Statistical distribution of parameters of lightning impulses in antennas and radar towers-practical application examples

The paper presents practical application examples of the method described by the author (see ibid., vol.2, p.1018-23, 1998). For some typical geometries of antennas and radar towers, the number of lightning strokes per year (in statistical sense, and in connection with the lightning density in flat ground, or with keraunic level), the statistical distribution of lightning impulses current amplitude, and examples of maximum current amplitude to consider with a risk criteria, are presented. Some results are given in parametric form, e.g. in function of height of antennas and towers. The results show the important influence of geometry in the statistical distribution of parameters of lightning discharges incident in towers, and the need of specific evaluation, in order to consider, in a correct way, lightning effects and risks in people and equipment, and in design of equipment, cabling, shielding and grounding.