3-D Imaging of Subsurface Features using GPR Array Beam Imaging
3-D Imaging of Subsurface Features using GPR Array Beam Imaging
10 PagesI 3-D IMAGING OF SUBSURFACE FEATURES USING GPR ARRAY BEAM IMAGING Jeffrey L. Orrey, Ojo Solutions, P.O. Box 754 1, Boulder, Colorado 80306-7541 Phil C. Sirles, Microgeophysics Corp., 10900 West 44th Avenue, Wheat Ridge, CO 80033 Charles B. Archambeau, TRAC-NA, 90 Commander Spur, Boulder, CO 80302 ABSTRACT In this paper, we provide a brief review of standard survey and analysis methods for ground penetrating radar (GPR) and then introduce a new method for producing three-dimensional (3-D) images of the subsurface using GPR. We outline the theory of the new imaging method, called Array Beam Imaging ( ABI ), by way of a schematic description. We then show results from application of the ABI imaging method to the characterization of a former manufactured gas plant (MGP) site. The 3-
