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- W2022878895 abstract "The notion that the scattering at the air–sea interface is insufficient to account for experimentally determined backscattering strengths at low grazing angles is based almost exclusively on the application of various scattering theories to sea surfaces that are described by steady-state, essentially 1-D sea surface spectra. In reality, and particularly for higher wind speeds where the steady state is rarely achieved, these spectra may not be representative of the seas encountered during the acoustics experiments and certainly do not describe seas that are due to time and spatially varying forcing conditions. For example, during the Chapman–Harris experiment wind speeds ranged from 0 to 30 kn over a 52-h period. Recently, NOARL funded OCTI to model the sea surface spectra encountered during the Critical Sea Test-4 (CST-4), which took place in the Gulf of Alaska. OCTI’s wave mode, WAVAD, takes into account time varying local and regional forcing conditions and predicts the 2-D sea surface spectrum. From these spectra, 2-D realizations are generated via a linear filter technique. The scattering theory employed is an exact integral equation approach [E. I. Thorsos, J. Acoust. Soc. Am. 83, 78–92 (1988)] that has been applied to 2-D surfaces. In this paper, a preliminary report is made on the low-frequency backscatter from realistic 2-D sea surfaces. [Work supported by ONR and ONT.]" @default.
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- W2022878895 date "1991-10-01" @default.
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- W2022878895 title "Exact scattering theory applied to more realistic 2‐D sea surfaces." @default.
- W2022878895 doi "https://doi.org/10.1121/1.401484" @default.
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