Bottom-Reflection Phase-Shift Estimation From ASIAEX Data

Ge, Huiliang; Zhao, Hangfang; Gong, Xianyi; Shang, E. C.

doi:10.1109/joe.2004.834180

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Overview Of Results Of Ocean Acoustic Experiments1

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Cited by 6 publications

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“…Such measurements interrogate the seabed in fundamentally different ways. Furthermore, the different approaches to geoacoustic inversion embodied by the degree of parsimony inherent in the inversion forward model, e.g., a half-space representation for the seabed as in [10]- [13], [15] versus a structured seabed representation that includes layers and gradients as in [3], [7]- [9], [14], invariably lead to seemingly different inversion goals and subsequent geoacoustic models for the seabed. (A lucid clarification concerning the basis of differing inversion goals is given in [16].)…”

Section: Overview Of Results Of Ocean Acoustic Experimentsmentioning

confidence: 99%

Overview of Results from the Asian Seas International Acoustics Experiment in the East China Sea

Dahl

Zhang

Miller

et al. 2004

IEEE J. Oceanic Eng.

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Section: Overview Of Results Of Ocean Acoustic Experimentsmentioning

confidence: 99%

Overview of Results from the Asian Seas International Acoustics Experiment in the East China Sea

Dahl

Zhang

Miller

et al. 2004

IEEE J. Oceanic Eng.

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A Shallow-Water Reverberation Model Based on Perturbation Theory

Shang

Gao

2008

IEEE J. Oceanic Eng.

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Relating waveguide invariant and bottom reflection phase-shift parameter P in a Pekeris waveguide

Shang

Zhao

2012

The Journal of the Acoustical Society of America

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The waveguide invariant β is affected by the shallow-water environment. The effect due to bottom sediment on β is investigated in this paper. It is found that the effect of sediment bottom can be concentrated on one parameter P-the bottom reflection phase-shift parameter. For a Pekeris waveguide, under Wentzel-Kramers-Brillouin (WKB) approximation, a very simple analytic relation is given: β ≈ 1 + P/(k(0)H(eff)), where H(eff) is the "effective depth," and H(eff) = H + P/2 k(0). The value of β related to different high-speed sediments (including layered sediment) ranges from 1.0 to 1.5. Some numerical examples including the layered sediment case are conducted to verify this result. Good agreement between the results calculated by KRAKEN and by WKB with parameter P has been found. Hence, the application of parameter P provides a model-free platform to investigate the bottom effect on the waveguide invariant β in shallow-water.

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Bottom-Reflection Phase-Shift Estimation From ASIAEX Data

Cited by 6 publications

References 13 publications

Overview of Results from the Asian Seas International Acoustics Experiment in the East China Sea

Overview of Results from the Asian Seas International Acoustics Experiment in the East China Sea

A Shallow-Water Reverberation Model Based on Perturbation Theory

Relating waveguide invariant and bottom reflection phase-shift parameter P in a Pekeris waveguide

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