Sonobuoy System and Concept of Operations for Time-Reversal-Based Target Detection

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68335-09-C-0084
Agency Tracking Number: N071-014-0827
Amount: $742,033.00
Phase: Phase II
Program: SBIR
Awards Year: 2008
Solitcitation Year: 2007
Solitcitation Topic Code: N07-014
Solitcitation Number: 2007.1
Small Business Information
APPLIED PHYSICAL SCIENCES CORP.
475 Bridge Street, Suite 100, Groton, CT, 06340
Duns: 112716357
Hubzone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Joshua Wilson
 Scientist
 (860) 448-3253
 jwilson@aphysci.com
Business Contact
 David Horne
Title: Sr Vice President/CFO
Phone: (860) 448-3253
Email: dhorne@aphysci.com
Research Institution
N/A
Abstract
Existing multistatic airborne ASW systems require high power sources and are unable to exploit the significant forward scattering strength of a submarine target due to the blinding presence of the direct blast. Time reversal (TR) is a recent method for focusing acoustic energy at a point using pairs of source and receive arrays. The TR focus provides a measure of propagation channel stability, allowing one to determine when the medium is disrupted as would occur when a scatterer such as a submarine target passes between the two arrays. In Phase II we propose to implement a TR barrier using SSQ-125-XN1 and SSQ-77C DVLA buoys in a controlled experiment. The purpose of this experiment is to demonstrate a TR barrier under typical at-sea conditions using realistic sonobuoy hardware. Using the data from this experiment we will (1) quantify the performance of the system in terms of probability of detection and detection range, (2) develop a procedure to automate target detection in the presence of noise and environmental fluctuations, and (3) validate and improve the models developed in Phase I for predicting TR performance.

* information listed above is at the time of submission.

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