1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Broadband synthetic aperture geoacoustic inversion
Rent:
Rent this article for
USD
10.1121/1.4807567
/content/asa/journal/jasa/134/1/10.1121/1.4807567
http://aip.metastore.ingenta.com/content/asa/journal/jasa/134/1/10.1121/1.4807567

Figures

Image of FIG. 1.
FIG. 1.

Horizontally stratified ocean with horizontally moving source and receiver. The source is moving at velocity and bearing , while the receiver is moving at velocity and bearing . Range origin is defined as the source position at time zero when the source begins transmitting.

Image of FIG. 2.
FIG. 2.

(Color online) A section of the 100–900 Hz ( s) source spectrum for LFM pulses in (a) magnitude and (b) phase.

Image of FIG. 3.
FIG. 3.

(Color online) Sensitivity plots for a static source/receiver case.

Image of FIG. 4.
FIG. 4.

(Color online) Histograms of four-parameter inversions for the static source and receiver case. The intensity plots are the histograms for the Monte Carlo simulation corresponding to 200 noise realizations with SNR fixed at  dB and number of LFM pulses . Histograms are stacked vertically along the horizontal axis. Color bars indicate the relative frequency values.

Image of FIG. 5.
FIG. 5.

(Color online) Histograms of four-parameter inversions for the moving source/static receiver case, SNR dB, and number of LFM pulses with corresponding synthetic aperture of [2.5, 5, 10, 20, 40, 80, 160] m for (a) uniform Doppler, and (b) waveguide Doppler.

Image of FIG. 6.
FIG. 6.

(Color online) (a) Simulated received spectrum (499–501 Hz) for with corresponding synthetic aperture of [2.5, 10, 80] m. (b) Same as (a) but prior to modal summation.

Image of FIG. 7.
FIG. 7.

(Color online) Histograms of four-parameter waveguide Doppler based inversions for the moving source/static receiver case, SNR dB and number of LFM pulses with corresponding synthetic aperture of [2.5, 5, 10, 20, 40, 80, 160] m. Frequency sampling within ±0.2 Hz band at every five spectral peaks.

Image of FIG. 8.
FIG. 8.

(Color online) SW06 experiment site, bathymetry, source, and receiver positions on JD238 (26 August 2006) 2000–2059 UTC.

Image of FIG. 9.
FIG. 9.

(Color online) Power spectral density of received signal.

Image of FIG. 10.
FIG. 10.

(Color online) (a) SW06 SHARK interpolated sound speed profile from 1830–2229 UTC. Temperature sensor depths ( ): 2, 4, 6, 7, 11, 13, 15, 18, 22, 26, 33, 41, 56, 71, and 78 m. (b) Mean SSP and EOFs derived from SHARK SSPs.

Image of FIG. 11.
FIG. 11.

(Color online) Section of SW06 received signal spectrum with LFM pulses .

Image of FIG. 12.
FIG. 12.

SW06 64 s data inversion scatterplots for with a synthetic aperture of 160 m for (a) waveguide Doppler model and (b) uniform Doppler model. The vertical dashed line shows the final inversion results with SNR dB.

Image of FIG. 13.
FIG. 13.

(Color online) SSP inversion results using SW06 experimental data and with waveguide Doppler and uniform Doppler models.

Tables

Generic image for table
TABLE I.

Source, propagation, and receiver frequencies mapping relationships where the first row is with respect to receiver frequency and the second is with respect to source frequency .

Generic image for table
TABLE II.

Baseline model parameters.

Generic image for table
TABLE III.

SW06 data inversion parameters search bounds and results for .

Loading

Article metrics loading...

/content/asa/journal/jasa/134/1/10.1121/1.4807567
2013-07-11
2014-04-24
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Broadband synthetic aperture geoacoustic inversion
http://aip.metastore.ingenta.com/content/asa/journal/jasa/134/1/10.1121/1.4807567
10.1121/1.4807567
SEARCH_EXPAND_ITEM