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

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N66604-06-C-1293
Agency Tracking Number: N045-011-0415
Amount: $899,953.00
Phase: Phase II
Program: STTR
Awards Year: 2006
Solicitation Year: 2004
Solicitation Topic Code: N04-T011
Solicitation Number: N/A
Small Business Information
9607 Jomar Drive, Fairfax, VA, 22032
DUNS: 140785929
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Russell Jeffers
 (703) 795-8574
Business Contact
 Joseph Liverman
Title: Principal
Phone: (571) 331-9431
Research Institution
 Ann T McGuigan
 Office of Sponsored Programs
4400 University Drive M/S 4C6
Fairfax, VA, 22030
 (703) 993-2298
 Nonprofit college or university
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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