Application of the algorithm for time of arrival estimation of N-waves produced by projectiles of different calibers

Abstract

The topic of this paper is a review of the application of the algorithm for time of arrival estimation of shock waves produced by projectiles of different calibers. Time of arrival estimation of the shock waves is based on the algorithm, which consists of wavelet decomposition, identification and extraction of a narrow data segment of the shock wave, and on the estimation of the time of arrival of the shock wave by conventional statistical methods. Sources of the shock waves were projectiles whose calibers varied, ranging from typical rifles, 5.56 mm, to large gun calibers of up to 122 mm. The quality of the time of arrival estimation is verified through a significant number of experiments. Estimated time of arrival values are used in determining the weapon position. Localization of the shock wave sources was done by networked and scattered in area of interest acoustic sensors. Discrete probability density method, based on time differences of arrivals obtained from multiple synchronized acoustic sensors, was used for localization of the weapon and these results are compared with their locations obtained by global positioning method.