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dc.contributor.authorSchmidt, Henrik
dc.date.accessioned2018-10-11T14:08:46Z
dc.date.available2018-10-11T14:08:46Z
dc.date.issued1998/05
dc.identifier12134
dc.identifier.govdocSR-289
dc.identifier.urihttp://hdl.handle.net/20.500.12489/513
dc.description.abstractThe new OASES-3D code developed at MIT is used to investigate the spatial and temporal characteristics of reverberation from rippled seabeds insonified by narrow beam sonars such as the TOPAS parametric source. It is shown that the highly polarized - close to monochromatic - spectral characteristics of ripple fields is associated with a reverberation environment which is highly sensitive to both frequency and insonification aspect relative to the ripples. The study suggests that significant gains in detection performance for buried objects can be achieved by band-limiting the processing to frequencies below an environmentally dependent "cut-off" frequency. The study also confirms theoretically the intuitive advantage of insonifying the seabed along the ripple direction to reduce monostatic reverberation.
dc.formatvi, 29 p. : ill. ; 15 fig.
dc.languageEnglish
dc.publisherNATO. SACLANTCEN
dc.relation.ispartofseriesADB247074L
dc.subjectBuried objects detection
dc.subjectMine burial and bottom conditions
dc.subjectShallow water
dc.subjectAcoustic reverberation
dc.subjectAcoustic scattering by elastic structures
dc.titlePhysics of 3-D scattering from rippled seabeds and buried targets in shallow water
dc.typeScientific Report (SR)


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