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Symmetry has important consequences for target recognition. Rotation and reflection symmetry for targets near a ground or water surface not only help to identify the targets, but also aid in data processing to increase accuracy. While clutter (other scatterers) interfere with the target signatures, symmetry in the clutter can be used to suppress this interference.
This paper summarizes much information concerning identification of buried targets (mines and unexploded ordnance). This utilizes concepts from the singularity expansion method and symmetry as they appear in the electromagnetic scattering. See the reference list for locating many more references.
Segmented loops form an appropriate array for a low-impedance magnetic antenna. This paper considers the symmetries of such antennas and the inclusion of pulse-power sources in the total configuration.
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