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An experimental demonstration of blind ocean acoustic tomographya)
a)Portions of this work were presented at the European Conference on Underwater Acoustics in July 2002, Gdansk, Poland.
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10.1121/1.2165070
/content/asa/journal/jasa/119/3/10.1121/1.2165070
http://aip.metastore.ingenta.com/content/asa/journal/jasa/119/3/10.1121/1.2165070
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

INTIFANTE’00 sea trial location.

Image of FIG. 2.
FIG. 2.

(Color online) INTIFANTE’00 sea trial: acoustic runs and bathymetry during events 2, 5, and 6. X signs mark the XBT locations and VLA indicates the vertical line array location.

Image of FIG. 3.
FIG. 3.

(Color online) XBT cast temperature profiles.

Image of FIG. 4.
FIG. 4.

(Color online) Temperature field recorded at the VLA during event 2(a), event 5(b), and event 6(c).

Image of FIG. 5.
FIG. 5.

GPS estimated ship speed (a) and ship heading (b) during event 6.

Image of FIG. 6.
FIG. 6.

Baseline environmental model for the range-independent propagation scenario of event 2.

Image of FIG. 7.
FIG. 7.

XBT-based data used for temperature estimation: mean temperature profile (left) and first two empirical orthonormal functions (EOFs) (right).

Image of FIG. 8.
FIG. 8.

(Color online) Focalization results for event 2: Bartlett power (a), source range (b), source depth (c), receiver depth (d), sediment compressional speed (e), sediment thickness (f), sub-bottom compressional speed (g), VLA tilt (h), EOF coefficient (i), EOF coefficient (j), and reconstructed temperature profiles (k).

Image of FIG. 9.
FIG. 9.

(Color online) Focalization results for event 5: Bartlett power (a), source range (b), source depth (c), receiver depth (d), sediment compressional speed (e), sediment thickness (f), sub-bottom compressional speed (g), VLA tilt (h), EOF coefficient (i), EOF coefficient (j), and reconstructed temperature profiles (k).

Image of FIG. 10.
FIG. 10.

(Color online) NRP D. Carlos I ship radiated noise received on hydrophone 8, relative power scale on a time-frequency plot (a) and mean power spectrum (b).

Image of FIG. 11.
FIG. 11.

INTIFANTE’00 sea trial, event 6 frequency selection: 1 - selection and 0 - no selection based on contiguous snapshot mean signal coherence along time [Eq. (6)].

Image of FIG. 12.
FIG. 12.

(Color online) Focalization results for event 6: Bartlett power (a), source range (b) [the continuous line is the GPS measured source–receiver range], source depth (c), receiver depth (d), sediment compressional speed (e), sediment thickness (f), sub-bottom compressional speed (g), VLA tilt (h), EOF coefficient (i), EOF coefficient (j) [filled dotted lines are the XBT measured data projected onto the respective EOFs], and reconstructed temperature (k).

Image of FIG. 13.
FIG. 13.

INTIFANTE’00 sea trial, event 6: histograms of the EOF coefficients estimates for (a) and (b).

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/content/asa/journal/jasa/119/3/10.1121/1.2165070
2006-03-01
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: An experimental demonstration of blind ocean acoustic tomographya)
http://aip.metastore.ingenta.com/content/asa/journal/jasa/119/3/10.1121/1.2165070
10.1121/1.2165070
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