Non-Plane-Wave Noise Source Localization in Very Shallow Water

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$899,953.00
Award Year:
2006
Program:
STTR
Phase:
Phase II
Contract:
N66604-06-C-1293
Award Id:
70418
Agency Tracking Number:
N045-011-0415
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
9607 Jomar Drive, Fairfax, VA, 22032
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
140785929
Principal Investigator:
Russell Jeffers
Principal
(703) 795-8574
russ.jeffers@3phoenix.com
Business Contact:
Joseph Liverman
Principal
(571) 331-9431
andy.liverman@3phoenix.com
Research Institute:
GEORGE MASON UNIV.
Ann T McGuigan
Office of Sponsored Programs
4400 University Drive M/S 4C6
Fairfax, VA, 22030
(703) 993-2298
Nonprofit college or university
Abstract
Spatial processing for Navy arrays has been designed in nearly all cases based on the a horizontally propagating plane wave model, the underlying assumption being that energy arrives from far field targets as a superposition of free field traveling waves at frequencies determined by the target signature. It is well known that acoustic propagation is much more complex than the simple model due to boundary interactions (as evidenced by multi-path), sound velocity variability, and other more complicated effects. These effects are most prominent in shallow water and at low frequencies where surface and bottom interactions are prevalent. The Phase I research on this topic has derived an effective method of predicting the arrival structure of complicated multipath and applying a novel broadband statistical method for recombining the diverse acoustic paths. The Phase I effort derived the theoretical basis for the method and demonstrated its feasibility. The Phase II research will investigate the robustness of the method to environmental uncertainty, apply it to more complicated environments, and extend it to narrowband processing for target classification.

* information listed above is at the time of submission.

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