Geomagnetic Reference Sensor System (GRSS) for Air Anti-Submarine Warfare (ASW)

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68335-08-C-0179
Agency Tracking Number: N081-009-0067
Amount: $79,833.00
Phase: Phase I
Program: SBIR
Awards Year: 2008
Solicitation Year: 2008
Solicitation Topic Code: N08-009
Solicitation Number: 2008.1
Small Business Information
P.O. Box 2607, Winnetka, CA, 91306
DUNS: 082191198
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 John Derderian
 Principal Investigator
 (818) 885-2200
 jderderian@arete.com
Business Contact
 Curt Harkless
Title: Vice President
Phone: (818) 885-2200
Email: charkless@arete.com
Research Institution
N/A
Abstract
A principal limiter of airborne MAD systems is geomagnetic noise. The long coherence length of geomagnetic noise recommends the use of correlation processing against a reference sensor outside the search area for noise mitigation, and an air-deployed buoy-mounted geomagnetic reference sensor system (GRSS) is a convenient operational configuration. This requires small, light, expendable vector magnetometers with sensitivity comparable to the larger, more expensive intrinsic scalar magnetometers used in airborne MAD detection. Sensitivity will be primarily limited by vertical surface motion noise and rotations of the vector magnetometer. Areté Associates and Ultra USSI propose to develop an air-deployable GRSS employing a fluxgate vector magnetometer that will meet or exceed the desired sensitivity of 10 pT per root-Hz over the MAD signal band. Surface motion noise will be minimized by isolating the magnetometer from surface wave motion with a mid-water drogue designed to attenuate mid-frequency surface wave motion, and further mitigated by correlation analysis referenced to surface and sub-surface motion sensors. Rotation noise will be mitigated by configuring the vector instrument as a virtual scalar magnetometer (VSM), employing a coordinated combination of motion compensation, advanced processing, and real-time in-sensor calibration compensation.

* Information listed above is at the time of submission. *

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