Application of unequally-spaced and non-linear three-hydrophone array in underwater acoustic coplanar target passive localization

According to the practical experimental environment and requirement,the specific formulas for underwater acoustic passive target localization using unequally spaced and non-linear three-hydrophone array was deduced.Compared with the basic theory of symmetrical array passive localization,a non-linear array error angle is employed to modify the distance and azimuth estimation.Averaging and Kalman filtering as post -processing methods were used for middle and final sea-test data processing.The processing results show that the algorithm is effective in target passive localization in near areas.