Accession Number : ADA310090

Title :   A Model for Bistatic Scattering into Ocean Sediments for Frequencies from 10 - 100 kHz.

Descriptive Note : Technical rept.,

Corporate Author : WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB

Personal Author(s) : Williams, Kevin L. ; Jackson, Darrell R.

PDF Url : ADA310090

Report Date : JUN 1996

Pagination or Media Count : 41

Abstract : 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 (Snell's 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.

Descriptors :   *BISTATIC SONAR, *ACOUSTIC SCATTERING, INTERFACES, PERTURBATION THEORY, HETEROGENEITY, OCEAN MODELS, ROUGHNESS, SEDIMENTS, OCEAN BOTTOM SOILS, NOISE(SOUND), FORWARD SCATTERING, SNELLS LAW.

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE