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.
Forward scatter target strength extraction in a marine environment (L)
Rent:
Rent this article for
USD
10.1121/1.3589251
/content/asa/journal/jasa/129/6/10.1121/1.3589251
http://aip.metastore.ingenta.com/content/asa/journal/jasa/129/6/10.1121/1.3589251
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Typical experimental arrangement for measurement of the scattering in the forward direction in a marine environment. The receiver array points can be realized by a real or synthetic array. The distances from the source to the nth receiver, from the target to the nth receiver, and from the source to the target are rSR (n), rTR (n), and rST , respectively.

Image of FIG. 2.
FIG. 2.

Logarithm of the ratio of the scattered pressure to source pressure (both measured at the receiver array) versus the source-to-target distance normalized by the distance between the source and receiver array, R. The curves are shown for different values of R.

Image of FIG. 3.
FIG. 3.

Normalized pressure in decibels at the N receiver positions (cross-range) plotted versus distance from the source to the N receivers (based on time delay). The signals from the following paths are labeled: direct path from source to receiver, one bounce off the bottom, one bounce off the surface, both surface and bottom bounces, and the forward scattered component. The groups of lines following the hyperbolic source function indicated by the white circles are ringing artifacts associated with the finite bandwidth source deconvolution. Left: as measured. Right: after wavenumber filtering.

Image of FIG. 4.
FIG. 4.

Target strength in decibels in the forward and near-forward direction of the proud spherical shell versus frequency and scattering angle. Left: measured in the Gulf of Mexico after extracting the incident source signal using the wavenumber-based filter. Center: ray-based calculation using the normal mode series solution for the scattering and four specific ray paths. Right: stars 3D finite element-based simulation wherein the elastic shell, the water, and the sediment (as a fluid) are modeled.

Image of FIG. 5.
FIG. 5.

Target strength in decibels in the forward and near-forward direction of the proud spherical shell versus frequency for eight specific scattering angles. Red: measured in the Gulf of Mexico after extracting the incident source signal using the wavenumber-based filter. Blue: ray-based calculation using the normal mode series solution for the scattering and four specific ray paths. Green: stars 3D finite element-based simulation wherein the elastic shell, the water, and the sediment (as a fluid) are modeled.

Loading

Article metrics loading...

/content/asa/journal/jasa/129/6/10.1121/1.3589251
2011-06-14
2014-04-21
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Forward scatter target strength extraction in a marine environment (L)
http://aip.metastore.ingenta.com/content/asa/journal/jasa/129/6/10.1121/1.3589251
10.1121/1.3589251
SEARCH_EXPAND_ITEM