A Model for Bistatic Scattering into Ocean Sediments for Frequencies from 10 - 100 kHz.
WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
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A model is developed for bistatic scattering into ocean sediments by an acoustic source located in the water and a receiver buried in the bottom. The model is closely related to that developed by Jackson 1993 for a source and receiver that were both located in the water and parallels that effort in many regards. In particular, bottom scattering is treated as being due to interface roughness and volume inhomogeneity. Kirchhoff theory is used to explain interface scattering near the refracted Snells law direction, and perturbation theory Moe et al., 1995 is used for all other directions. Perturbation theory is used to treat the scattering due to volume inhomogeneities. Model results are presented for two of the bottom sites examined by Jackson 1993, and possible experimental tests of the model are discussed briefly.