Bistatic bottom reverberation in deep ocean: Modeling and data comparison

A model is developed for bistatic bottom reverberation in the deep ocean, which includes the propagation and scattering processes. The two-way propagations from the source to scatterer and the scatterer to receiver are described by ray theory. The sound speed profile in the deep ocean is taken into account for the accuracy. The scattering intensity is assumed to be a sum of the roughness-scattering and volume-scattering cross sections. The roughness-scattering intensity is formed by smooth interpolation between the Kirchhoff cross section near the specular direction and the perturbation cross section elsewhere. The model is tested against data acquired as part of the deep ocean research program in the south China sea. The comparisons between model prediction and measured reverberation data are presented. The results show that the numerical calculations from the bistatic bottom reverberation model fit the experimented data well.