Non-Plane-Wave noise source localization for horizontal arrays at low frequency in very shallow water (VSW)

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$69,993.00
Award Year:
2004
Program:
STTR
Phase:
Phase I
Contract:
N00014-04-M-0234
Award Id:
70417
Agency Tracking Number:
N045-011-0301
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
2 State Street, Suite 300, New London, CT, 06320
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
112716357
Principal Investigator:
Charles Corrado
Principal Scientist
(860) 440-3253
jrudzinsky@aphysci.com
Business Contact:
David Horne
Business Manager
(860) 440-3253
dhorne@aphysci.com
Research Institution:
Massachusetts Institute of Technolo
Charlotte Morse
77 Massachusetts Avenue
Cambridge, MA, 02139
(617) 253-3529
Nonprofit college or university
Abstract
Localizing low frequency noise sources in shallow water using a horizontal array is complicated by waveguide dispersion and maneuverability constraints. If the dispersive properties of the sound propagation channel are well known, waveguide effects can be used advantageously for the purpose of localizing sources without requiring a relative change in bearing to the target. Here we propose to investigate the feasibility of using optimal waveguide source localization (OWSL). In this approach, the approximate bearing of a source is first obtained using plane-wave beamforming. Sophisticated processing techniques exploiting broadband waveguide physics and waveguide invariant theory are then used to efficiently refine the bearing estimate and simultaneously estimate the range of the source. Our Phase I effort will include development of a high fidelity system simulation to determine the expected performance of OWSL for representative scenarios assuming expected uncertainties in both the important environmental (e.g., sound speed) and system (e.g., noise levels and sensor locations) parameters. Utilizing a new statistical methodology, we will determine measurement system requirements, such as synthetic array aperture length and measurement sample size, necessary to attain desired design accuracy. A detailed evaluation and demonstration process required for Fleet implementation will also be developed.

* information listed above is at the time of submission.

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