KEYWORDS: Magnetism, Sensors, Magnetic sensors, Stars, Detection and tracking algorithms, Prototyping, Algorithm development, Signal processing, Land mines, Warfare
A man-portable Magnetic Scalar Triangulation and Ranging ("MagSTAR") technology for Detection, Localization and
Classification (DLC) of unexploded ordnance (UXO) has been developed by Naval Surface Warfare Center Panama City
Division (NSWC PCD) with support from the Strategic Environmental Research and Development Program (SERDP).
Proof of principle of the MagSTAR concept and its unique advantages for real-time, high-mobility magnetic sensing
applications have been demonstrated by field tests of a prototype man-portable MagSTAR sensor. The prototype
comprises: a) An array of fluxgate magnetometers configured as a multi-tensor gradiometer, b) A GPS-synchronized
signal processing system. c) Unique STAR algorithms for point-by-point, standoff DLC of magnetic targets. This paper
outlines details of: i) MagSTAR theory, ii) Design and construction of the prototype sensor, iii) Signal processing
algorithms recently developed to improve the technology's target-discrimination accuracy, iv) Results of field tests of
the portable gradiometer system against magnetic dipole targets. The results demonstrate that the MagSTAR technology
is capable of very accurate, high-speed localization of magnetic targets at standoff distances of several meters. These
advantages could readily be transitioned to a wide range of defense, security and sensing applications to provide faster
and more effective DLC of UXO and buried mines.
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