Accession Number : AD0776583

Title :   Calculation of RMS Slope of Carrier Waves in a Composite-Roughness Sea Surface Model,

Corporate Author : SACLANT ASW RESEARCH CENTRE LA SPEZIA (ITALY)

Personal Author(s) : Bachmann,Wolfgang

Report Date : 15 JAN 1974

Pagination or Media Count : 22

Abstract : For calculating RADAR clutter or SONAR reverberation from the sea surface, the best results are achieved by applying a composite-roughness model. The underlying idea is that the small wavelets ('ripples') primarily responsible for the backscattering are carried by longer waves with higher amplitudes ('swell'), which affect the scattering process in a non-linear way. It has been shown in a previous paper that the parameter describing the coupling of the long- and short-wave scattering is the rms slope of conceptual 'facets' on the long waves. This paper develops methods for determining a suitable facet length and for calculating the rms facet slope. (Author)

Descriptors :   *Acoustic scattering, *Ocean surface, Surface roughness, Radar signals, Sonar signals, Underwater sound, Backscattering, Standard deviation, Italy

Subject Categories : Acoustic Detection and Detectors
      Active & Passive Radar Detection & Equipment
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE