Accession Number : AD0775568

Title :   Spectral Characteristics of Bistatic Surface Scatter.

Descriptive Note : Technical rept. Jun-Dec 73,

Corporate Author : HONEYWELL INC SEATTLE WASH MARINE SYSTEMS DIV

Personal Author(s) : Swarts,Robert L.

Report Date : 06 FEB 1974

Pagination or Media Count : 52

Abstract : The results of an experimental program designed to measure the spectral characteristics of underwater bistatic surface scatter as a function of sea state and geometry are presented. The sea states examined were all small but because of the short acoustic wavelength the square of the Rayleigh parameter ranged from 4.45 to 108.1 with all but one of the measurements in the 'very rough' regime. Both specular and off-specular data were collected. A plane wave theoretical model was used heuristically to indicate the trends to be expected in the data. It was found that, in general, the plane wave model did not adequately predict the results although in certain special circumstances its results were accurate. Areas requiring additional effort are discussed. (Author)

Descriptors :   *Underwater sound, *Acoustic scattering, *Ocean surface, Surface roughness, Sea states

Subject Categories : Physical and Dynamic Oceanography
      Acoustic Detection and Detectors
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE