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Results of the experimental simulation of an influence of the lightning diverter strip models on spectral characteristics of discharge phenomena inside aircraft nose radome model, using artificial thunderstorm cell of a negative polarity, have presented. Significant influence of a lightning stripe model type on an amplitude and a form of the signals registered on an antenna model when discharge forms between an artificial thunderstorm cell a nose radome model and on the characteristics of their Fourier and wavelet spectrums has been experimentally established. It was found that the characteristic frequencies in the registered signals are on order higher for the segmented lightning stripes than for the solid lightning diverter stripes. Possible reasons of such differences are discussed in paper. Dependencies between the spectral characteristics of the signal registered on antenna inside a radome model and the parameters of the current impulses of discharge formed on both type of the lightning stripe models being on an external surface of a radome model have been established. Possibility of a correction of a lightning protection system of an aircraft nose radome for the decreasing of a signal intensity induced on antenna due to lightning, atmospheric and static electricity action has been analyzed and experimentally check including the frequency region dangerous for the radar and the computer equipment connected with them. [ABSTRACT FROM AUTHOR]

Results of an investigation of the peculiarities of a spectrum of the electromagnetic signals induced nearby discharges between an artificial thunderstorm cell and a ground have presented. It was experimentally found that the impulse current parameters and an intensity, form, spectral characteristics of the induced electromagnetic signals depend on a variant of a discharge formation from an artificial thunderstorm cell (upward discharge, downward discharge, or counterpart discharge). Significant difference of the wavelet spectrum characteristics of the electromagnetic signals registered by the antennas in the vicinity of discharge formation has been found for these three variants. Significant difference of the spectral characteristics of the electromagnetic signals induced on nearby antennas during the time of the first and subsequent current impulses of a discharge between an artificial thundercloud and a ground: in average, subsequent discharges have more less characteristic frequencies. Possible reasons of that differences have discussed in paper. Role of the powerful streamer discharges during the main stage formation in the appearance of the ultrahigh frequency range of the induced electromagnetic signals has considered. Some dependencies between the spectral characteristics of signals registered by antennas and the parameters of the current impulses for the different variants of the main stage of the discharge between the artificial thunderstorm cell and the ground have been established. The possibility of applying the results obtained for improving the operation of lightning direction finding systems is being considered. [ABSTRACT FROM AUTHOR]