Accession Number : ADA328101

Title :   Bistatic Bottom Scattering: Model, Experiments, and Model/Data Comparison.

Descriptive Note : Technical rept.,

Corporate Author : WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB

Personal Author(s) : Williams, K. L. ; Jackson, D. R.

PDF Url : ADA328101

Report Date : JUL 1997

Pagination or Media Count : 33

Abstract : A model is presented for bistatic scattering from ocean sediments. It treats scattering due to both roughness of the seabed and volume inhomogeneities within the sediment. Accordingly, the scattered intensity is assumed to be a sum of two terms, one proportional to the roughness-scattering cross section and the other proportional to the volume-scattering cross section. The model is tested against data acquired as part of the Coastal Benthic Boundary Layer (CBBL) research program. As part of that program, an autonomous, circularly scanning sonar system was deployed in well-characterized regions. This sonar operated at 40 kHz, had a 5 deg horizontal beam, and acquired backscattering data over a 50-m radius. During part of the deployment, it operated in conjunction with a mobile receiving array so as to acquire bistatic data. The experimental apparatus and procedures are presented, and results are compared with model predictions.

Descriptors :   *ACOUSTIC SCATTERING, *SEDIMENTS, BISTATIC SONAR, SURFACE ROUGHNESS, BACKSCATTERING, OCEAN BOTTOM TOPOGRAPHY, ACOUSTIC DATA, BISTATIC DETECTION, SONAR ARRAYS, SCANNING SONAR.

Subject Categories : Physical and Dynamic Oceanography
      Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE