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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
Contract: N00014-04-M-0234
Agency Tracking Number: N045-011-0301
Amount: $69,993.00
Phase: Phase I
Program: STTR
Solicitation Topic Code: N04-T011
Solicitation Number: N/A
Timeline
Solicitation Year: 2004
Award Year: 2004
Award Start Date (Proposal Award Date): 2004-07-01
Award End Date (Contract End Date): 2005-04-30
Small Business Information
2 State Street, Suite 300
New London, CT 06320
United States
DUNS: 112716357
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Charles Corrado
 Principal Scientist
 (860) 440-3253
 jrudzinsky@aphysci.com
Business Contact
 David Horne
Title: Business Manager
Phone: (860) 440-3253
Email: dhorne@aphysci.com
Research Institution
 Massachusetts Institute of Technolo
 Charlotte Morse
 
77 Massachusetts Avenue
Cambridge, MA 02139
United States

 (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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