No abstract

Synthetic Aperture Sonar is a side-looking sonar that can obtain the equal resolution of the sonar images in lower frequencies than the conventional frequency ranges of Side Scan Sonar. The current study shows a part of the works being developed in the incorporation of the prototypes of Synthetic Aperture Sonar. As well as the conventional 2-D SAS, the system also has the bathymetric imaging in mind. In order to test the parameters and the algorithms imbedded in the system, a partially buried rigid cylinder was adopted as a simulation target for the broadside incident and the scattering amplitude by the cylinder was calculated by the Kirchhoff approximation. The features of monostatic scattering by a partially buried objects on the boundary are heavily dependent on its exposed surface out of the boundary [K. Baik and P. L. Marston, IEEE J. Ocean. Eng. 33, 368 (2008)] due to the contributions by the flat boundary to the scattered direction. Delay of the reverberation between the boundary and the cylinder was considered by the inverse Fourier transform of total scattering form function [L. G. Zhang etal., J. Acoust. Soc. Am. 91, 1862 (1992)] in the modeling. Current study shows the effects the parameters of the scattering by the partially buried cylinder on the resulting simulated SAS images. [This work is supported by the project of “Development of towed interferometric Synthetic Aperture Sonar” (15-CM-SS-01).]