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Estimation of modal group velocities with a single receiver for geoacoustic inversion in shallow water
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10.1121/1.3459855
/content/asa/journal/jasa/128/2/10.1121/1.3459855
http://aip.metastore.ingenta.com/content/asa/journal/jasa/128/2/10.1121/1.3459855
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Simulated signal in an ideal waveguide (sound speed: , water depth: 100 m, source depth: 20 m, receiver depth: 100 m, range: 5 km): (a) Spectrogram of the simulated signal, (b) Simulated data time series, (c) Spectrogram of the signal after time-warping, (d) Spectrogram of the signal after frequency-warping.

Image of FIG. 2.
FIG. 2.

Extracted modal dispersion structures and corresponding group velocities in an ideal waveguide (sound speed: , water depth: 100 m, range: 5 km): (a) Extracted modal dispersion structures (gray dots) and theoretical ones (black lines), (b) Extracted group velocities (gray dots) and theoretical ones (black lines).

Image of FIG. 3.
FIG. 3.

Dispersion curves extraction in a noisy Pekeris waveguide: (a) Spectrogram of the simulated signal, (b) Spectrogram (with a threshold of 20%) of the signal after time-warping, (c) Extracted modal dispersion curves.

Image of FIG. 4.
FIG. 4.

Experimental North Sea data: (a) Spectrogram of the recorded signal and corresponding estimated dispersion curves, (b) Spectrogram of recorded signal after time warping.

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/content/asa/journal/jasa/128/2/10.1121/1.3459855
2010-08-09
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Estimation of modal group velocities with a single receiver for geoacoustic inversion in shallow water
http://aip.metastore.ingenta.com/content/asa/journal/jasa/128/2/10.1121/1.3459855
10.1121/1.3459855
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