Data processing: measuring – calibrating – or testing – Measurement system – Orientation or position
Reexamination Certificate
2008-06-23
2009-10-13
Nghiem, Michael P. (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system
Orientation or position
Reexamination Certificate
active
07603251
ABSTRACT:
A magnetic anomaly sensing system and method uses at least eight triaxial magnetometer (TM) sensors arranged to define a cubic space. Each TM sensor measures a local magnetic field associated with a target region and generates magnetic field data indicative thereof. The magnetic field data is processed in accordance with a magnetic scalar triangulation and ranging (STAR) processing scheme to determine a plurality of gradient contractions CT,Iat a corresponding plurality of measurement points I to include at least at the center of each face of the cubic space. Gradient contraction pairs are defined for each sensors' X, Y, Z magnetic sensing axes. A directional derivative ∇CTis determined using the gradient contraction pairs and the baseline distances therebetween. A unit vector, calculated using the directional derivative ∇CT, is used in determining a projection distance from each of the measurement points toward the target region.
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Oeschger John
Wiegert Roy
Khuu Cindy H
Nghiem Michael P.
Shepherd James T.
The United States of America as represented by the Secretary of
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