3-D LOCALIZATION OF BURIED OBJECTS BY NEARFIELD ELECTROMAGNETIC HOLOGRAPHY

We present a practical method of localizing underground objects with l ow-frequency electromagnetic fields. The method uses spatial informati on from the field measured on the ground, and a nearfield ''holographi c'' theory to reconstruct the field image of buried objects. Both nume rical simulations and field tests demonstrate that buried metallic obj ects can be resolved and individually localized in 3-D space even if t he measurement field shows only a single peak as might be indicative o f a single object.