LAUSR

The authors study a problem of determining the bottom topography of a fluctuating ocean using the data of side-scan sonars. Based on a kinetic model of acoustic radiative transfer authors obtain a formula for determining a function describing small deviations of the bottom surface from a middle level. The impulse parcels of source and width of the directivity pattern of the receiving antenna are constructed unfocused sebottom image. For solving it, authors used iterative algorithm for focusing objects on the seabottom. Numerical experiments have been done on modeling data that demonstrate the accuracy of the obtained formula. Numerical analysis of the volume scattering influence is done. The volume scattering filter allows to reconstruct sea bottom relief from long range, e.g., signal from 150 m includes more than 50% of volume scattering, hence object recognizing is not possible without filtering. The width of directivity pattern affects to the object defocussing. This effect is increased with slant rang...