SUBSURFACE BUOY FOR NON-ACOUSTIC ASW

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N/A
Agency Tracking Number: 12811
Amount: $61,967.00
Phase: Phase I
Program: SBIR
Awards Year: 1990
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Physical Dynamics Inc
Po Box 1883, La Jolla, CA, 92038
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Walter N Podney
 (619) 454-2519
Business Contact
Phone: () -
Research Institution
N/A
Abstract
POTENTIAL FLOW AROUND A MOVING BODY IN A FLUID PRODUCES DISPLACEMENT OF ISOPYCNAL SURFACES. AT THE FREE SURFACE OF THE FLUID, THE DISPLACEMENT IS KNOWN AS THE "BERNOULLI HUMP". TILT OF THE FREE SURFACE CAN BE MEASURED IN ICE-COVERED SEAS WHERE SURFACE WAVES ARE HEAVILY DAMPLED. THE BERNOULLI HUMP PROCEDURES A TILT SIGNAL IN A FREQUENCY BAND WHERE AMBIENT FLUCTUATIONS ARE SMALL. IN THE OPEN OCEAN, SUBMERGING A TILT PLATFORM ATTENUATES MOTION FROM SURFACE WAVES AND MAY PROVIDE A MEANS TO DETECT SUBMARINES PASSIVELY AND NON-ACOUSTICALLY. MEASUREMENTS PROPOSED FOR PHASE I USE A TEST BUOY TO TELL WHETHER A SIMILAR SPECTRAL WINDOW EXISTS AT DEPTH BELOW AN OPEN SEA. THE TEST ALLOWS ASSESSMENT OF THE FEASIBILITY OF USING SUBSURFACE TILTMETER BUOYS TO TRACK SUBMARINES.

* information listed above is at the time of submission.

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