Modeling the effects of linear shallow-water internal waves on horizontal array coherence

作者: Daniel Rouseff , Andrey A. Lunkov

DOI: 10.1121/1.4930954

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摘要: The coherence length of a horizontal array is the maximum separation between two points where coherent processing gives useful gain when distant source at broadside. In shallow water, limited by environmental variability caused several relevant oceanographic processes. present study, statistical model developed that quantifies how one process, linear internal waves, affects length. A key input to ocean sub-model vertically integrated energy density wave field. acoustic based on adiabatic normal mode approximation and so should be reasonable for frequencies under 1 kHz. Numerical calculations using data from Shallow Water 2006 Experiment (SW06) show individual modes varies with consequent effects coherence. shown strong function are positioned in water column. For bottom-mounted above moderately lossy seabed, predicts depends only weakly range, an effect observed field experiments.

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