Ocean sound speed fluctuations
نویسندگان
چکیده
منابع مشابه
On horizontal coherence estimates from path integral theory for sound propagation through random ocean sound-speed perturbations.
Previously published results from path integral theory for the horizontal coherence length utilized an empirical relation for the phase structure function density that was quite different from path integral results obtained for depth and time coherence where the phase structure function density was expanded to second order in the lag. This letter presents a result for horizontal coherence lengt...
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Data collected over more than eight consecutive hours between two source-receiver arrays in a shallow water environment are analyzed through the physics of the waveguide invariant. In particular, the use of vertical arrays on both the source and receiver sides provides source and receiver angles in addition to travel-times associated with a set of eigenray paths in the waveguide. From the trave...
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The effect of ocean sound speed uncertainty on matched-field geoacoustic inversion is investigated using data from the SW06 experiment along a nearly range-independent bathymetric track. Significant sound speed differences were observed at the source and receiving array and several environmental parameterizations were investigated for the inversion including representing the ocean sound speed a...
متن کاملDeep ocean sound speed characteristics passively derived from the ambient acoustic noise field
L.G. Evers,1,2 K. Wapenaar,2 K.D. Heaney3 and M. Snellen4 1Department of Seismology and Acoustics, Royal Netherlands Meteorological Institute, 3731 GA De Bilt, The Netherlands. E-mail: [email protected] 2Department of Geoscience and Engineering, Faculty of Civil Engineering and Geosciences, Delft University of Technology, 2628 CN Delft, The Netherlands 3Ocean Acoustical Services and Instrumentation...
متن کاملTime-angle sensitivity kernels for sound-speed perturbations in a shallow ocean.
Acoustic waves traveling in a shallow-water waveguide produce a set of multiple paths that can be characterized as a geometric approximation by their travel time (TT), direction of arrival (DOA), and direction of departure (DOD). This study introduces the use of the DOA and DOD as additional observables that can be combined to the classical TT to track sound-speed perturbations in an oceanic wa...
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ژورنال
عنوان ژورنال: Nature
سال: 1980
ISSN: 0028-0836,1476-4687
DOI: 10.1038/284380a0