Ocean remote sensing problem is studied as an inverse problem for the model of sound propagation based on the nonstationary radiative transfer equation with a Lambertian boundary condition. The sea bottom scattering coefficient is determined by using signal measured in a side scan sonar. Numerical solution to the inverse problem is analyzed depended on different number of remote sensing angles and on different radiation pattern widths. The volumetric scattering effect in the sea bottom reconstruction is demonstrated.
The kinetic model, describing sound propagation in the ocean with diffuse reflection by Lambert's cosine law on the bottom surface, is considered. The inverse problem of bottom scattering reconstruction is formulated. The inverse problem is reduced to solving the Fredholm integral equation of the first kind. An iterative algorithm is developed. Numerical experiments for reconstruction of the seabottom scattering coefficient depending on different width of directivity pattern are carried out.
The kinetic model, describing sound propagation in a randomly inhomogeneous medium with diffuse reflection by Lambert's cosine law on the bottom surface, is considered. Based on it the inverse problem of bottom scattering reconstruction is formulated. An explicit solution is deduced by using a narrow receiving directivity pattern and a pointwise isotropic source. Numerical experiments for the analysis of the impact of the finite pulse and the finite receiving directivity pattern on the received signal are done.