Patent ID: 7336079
Filing Date: 2008-02-26
Classification: G01V

Abstract:
1. An airborne system for electronic detection of surface and underground threats, comprising: a primary electromagnetic (EM) wave radiator for radio illuminating a local area; an EM gradiometer for detecting secondary EM waves from objects illuminated by a primary EM wave; means for providing a synchronizing reference signal from the primary EM wave radiator to the EM gradiometer for synchronous detection with right and left magnetic dipole antennas; an airborne vehicle for lifting the EM gradiometer aloft over said local area during periods said objects are radio illuminated; and a graphical user interface (GUI) for processing phase and amplitude measurements of said secondary EM waves, and for displaying information about the location of threat objects illuminated by said primary EM wave in said local area passing underneath the airborne vehicle.