Model for the frequency spread of backscattered underwater sound based on the facet model of the rough sea surface

dc.contributor.author	Schwarze, Herward
dc.date.accessioned	2018-10-11T14:06:30Z
dc.date.available	2018-10-11T14:06:30Z
dc.date.issued	1978/11
dc.identifier	1806
dc.identifier.govdoc	SR-26
dc.identifier.uri	http://hdl.handle.net/20.500.12489/255
dc.description.abstract	A theoretical model for the doppler spread of backscattered acoustic waves from the rough sea surface is described on the basis of the decomposition of the continuous sea-surface spectrum that leads to the concept of facets. The facet statistics are derived for a gaussian sea surface. The results are evaluated for a Pierson-Moskowitz spectrum. A procedure for choosing the facet length is developed. Approximate, simple formulas for the Pierson-Moskowitz case are given. The general result for the doppler spread of the backscattered acoustic wave is evaluated for sea-surface spectrum due to Scott, and examples for doppler spectra are given for different windspeeds, wind directions, grazing angles, and acoustic frequencies.
dc.format	15 p. : ill.
dc.language	English
dc.publisher	NATO. SACLANTCEN
dc.source	In: Journal of the Acoustical Society of America, 1978, vol. 64, no. 2, pp. 605-613.
dc.subject	Acoustic scattering - Seafloor and sea surface
dc.subject	Sea surface topography
dc.subject	Acoustic models
dc.subject	Spectrum analysis
dc.subject	Gaussian distribution
dc.title	Model for the frequency spread of backscattered underwater sound based on the facet model of the rough sea surface
dc.type	Papers and Articles
dc.type	Scientific Report (SR)