Ambient Noise Interferometry for Passive Characterization of Dynamic Environments

Award Information
Agency:
Department of Defense
Branch:
Navy
Amount:
$100,000.00
Award Year:
2010
Program:
STTR
Phase:
Phase I
Contract:
N68335-10-C-0414
Agency Tracking Number:
N10A-004-0274
Solicitation Year:
2010
Solicitation Topic Code:
N10A-T004
Solicitation Number:
2010.A
Small Business Information
Zel Technologies, LLC
54 Old Hampton Lane, Hampton, VA, 23669
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
825732993
Principal Investigator
 Oleg Godin
 Senior Research Scientist
 (303) 497-6558
 oleg.godin@noaa.gov
Business Contact
 Susan Hughes
Title: Director, Contracts
Phone: (757) 722-5565
Email: susan.hughes@zeltech.com
Research Institution
 The Universtiy of Colorado
 Randall Draper, PhD
 Office of Contracts and Grants
572 UCB 3100 Marine St, Rm 481
Boulder, CO, 80309
 (303) 492-2695
 Nonprofit college or university
Abstract
Non-invasive, stealthy nature of passive remote sensing combined with its low cost make passive techniques a promising supplement or replacement of traditional active remote sensing techniques. Coherent processing of diffuse wave fields has a proven potential for remote sensing of stationary environments. The proposed research extends noise interferometry to characterization of dynamic environments. We will develop “acoustic daylight” and “radio wave daylight” techniques for retrieval of information about targets and their surroundings from the ambient acoustic noise and the background radio waves; and determine which environmental parameters and types of targets can be effectively monitored through ambient noise interferometry. During Phase I we propose to demonstrate experimentally the feasibility of passive acoustic measurements of sound speed and flow velocity in a moving fluid and to evaluate necessary noise averaging times and receiver network geometry for detection of targets and achieving desired accuracy of passive acoustic measurements of environmental parameters. In case of positive results of Phase I, the efforts of Phase I optional part and Phase II will be directed toward extension of the interferometric approach to ambient acoustic noise in the ocean and to electromagnetic ambient noise in the microwave band in the atmosphere as well as to optimization of the data acquisition geometry, frequency band, and data processing algorithms to improve accuracy of passive travel time measurements and sensitivity to weak, transient environmental perturbations.

* information listed above is at the time of submission.

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