Scattering of low frequency sound in East China Sea experiment

In order to acquire three-dimensional properties of sea surface and bottom scatterings in shallow water, low-frequency bistatic reverberation was measured in the East China Sea. An inversion method was applied to the estimate of parameters in sea surface and bottom scattering functions. By using the estimated parameters, sea surface and bottom scattering strengths were derived as functions of grazing angle and azimuthal angle. The result obtained in this work indicates high scattering strength in the vicinity of the direction of specular reflection, and little dependency of scattering strength on scattering azimuthal angle except around forward direction in each case of sea surface and bottom scatterings.