Using short curved vertical arrays in ocean acoustic tomography

Burov, V. A.; Sergeev, S. N.; Shurup, A. S.

doi:10.1134/s1063771009020146

Cited by 11 publications

(3 citation statements)

References 13 publications

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“…These arguments suggest that conditions for noise interferometry are at least as favorable at r = 50 km, h = 5km as under conditions that we have reported on. Also, we note that, independent of water depth and details of propagation conditions, better results (e.g., shorter required coherent stacking time to extract Green's function estimates with adequate signal‐to‐noise ratio) are expected [ Burov et al , ; Leroy et al , ; Menon et al , ; Goncharov et al , ; Fried et al , ] if point measurements are replaced by vertical array measurements, even short arrays. With these comments in mind, we are optimistic about the potential of using noise interferometry as the basis for tomographic inversions at ranges longer than those considered in this letter.…”

Section: Summary and Discussionmentioning

confidence: 99%

Acoustic Green's function extraction from ambient noise in a coastal ocean environment

Brown

Godin

Williams

et al. 2014

Geophysical Research Letters

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We report on the results of an underwater acoustic field experiment conducted in December 2012 on the continental shelf off the Florida Keys in water of approximately 100 m depth. Ambient noise was recorded concurrently on three moored near-bottom instruments with horizontal separations of approximately 5 km, 10 km, and 15 km. We focus in this letter on instrument pairs with 5 km and 10 km separations. Consistent with theoretical predictions, coherent sums of many realizations of cross correlations of ambient noise records at two measurement locations are shown to yield approximations to deterministic acoustic Green's functions that describe propagation between those two locations. The results presented demonstrate the feasibility of extracting information suitable for use in tomographic inversions from measurements of underwater acoustic ambient noise.

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Section: Summary and Discussionmentioning

confidence: 99%

Acoustic Green's function extraction from ambient noise in a coastal ocean environment

Brown

Godin

Williams

et al. 2014

Geophysical Research Letters

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“…On the one hand the frequency filtering should be done in quite wide band to estimate propagation time with appropriate accuracy; on the other hand frequency band should be quite narrow to minimize dispersion influence which can by significant in the shallow water sound propagation and are estimated for conditions of particular experiment. In the case of unknown antenna declinations or when the antennas do not cover the whole depth more sophisticated mode-to-mode noise correlation techniques should be applied [10]. The described approach of estimation of mode propagation times from the noise cross-correlation function was numerically examined [10] and its feasibility was show.…”

Section: Passive Regimementioning

confidence: 99%

“…In the case of unknown antenna declinations or when the antennas do not cover the whole depth more sophisticated mode-to-mode noise correlation techniques should be applied [10]. The described approach of estimation of mode propagation times from the noise cross-correlation function was numerically examined [10] and its feasibility was show. The experimental verification for the obtained results is required.…”

Section: Passive Regimementioning

confidence: 99%

Tomographic inversion of bottom parameters in shallow water

Burov¹,

Sergeev²,

Shurup³

et al. 2012

Proceedings of Meetings on Acoustics

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The possibility of simultaneous reconstruction of the relief and sound speed in the ocean bottom by the mode tomography methods is discussed. In tomographic inversion the region under investigation is divided into stripes with constant parameters to be reconstructed. These stripes form so-called "stripe" basis which was previously used for reconstruction of sound speed perturbation and flows in the the ocean. As a result the scheme of simultaneous reconstruction of all investigated ocean parameters (sound speed, currents and eddies, bottom parameters) can be realized in the unified approach which is based on the stripe basis application. Limitations of the regarded method are discussed and results of numerical simulations are presented.

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