Abstract: A method and system for examining subsurface targets utilizing an elevated or airborne platform. A broad spectrum of frequencies is transmitted from the platform and is directed at the various subsurface targets. A plurality of chirp signals would be utilized to transmit the entire frequency range. These signals are reflected from the various subsurface targets and are received by the platform. The received chirp signals are combined in a manner to allow the visualization of the subsurface target.

Abstract: A method and system for examining subsurface targets utilizing an elevated or airborne platform. A broad spectrum of frequencies is transmitted from the platform and is directed at the various subsurface targets. A plurality of chirp signals would be utilized to transmit the entire frequency range. These signals are reflected from the various subsurface targets and are received by the platform. The received chirp signals are combined in a manner to allow the visualization of the subsurface target.

Abstract: An ultra-wide band ground penetrating radar (GPR) system providing non-invasive detection and three-dimensional mapping of underground objects and voids. The performance of this radar provides improved underground object detection, location and identification over existing radars through the use of a novel interrupted, frequency modulated, continuous wave (FMCW) signal waveform. A synthetic aperture radar (SAR) technique known as spotlight mode focused (SAR) operation is used to collect data for the underground area of interest, by circumscribing this area with a radar beam provided on an airborne or ground based vehicle. Near-Brewster angle illumination of the ground is used to reduce losses.