The basis choice and the reconstruction of combined refractive‐kinetic inhomogeneities in the problems of ocean acoustic tomography

Abstract

The characteristics of the acoustical signal in ocean are determined by both the refractive inhomogeneities (the perturbation of sound velocity) and the presence of ocean currents. The methods of acoustical tomography can be applied to the simultaneous reconstruction of both refractive and kinetic inhomogeneities. In this paper the problem of the combined refractive‐kinetic inhomogeneites reconstruction by the tomography methods is considered. For the realization of proposed scheme so called band basis consisted of a number of intersected stripes is applied. The advantage of the band basis in tomographic applications is conditioned by the simplicity of solving the direct problem and the possibility of describing all types of inhomogeneities in a unified manner. The comparison of the band basis with the commonly used basis composed of nonoverlapping squares is considered. The results of the reconstruction of model kinetic and combined refractive‐kinetic inhomogeneities in band basis are presented. The poss...