14 September 1994 Three-dimensional ground-penetrating radar imaging using multifrequency diffraction tomography
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In this paper we present results from a three-dimensional image reconstruction algorithm for impulse radar operating in monostatic pulse-echo mode. The application of interest to us is the nondestructive evaluation of civil structures such as bridge decks. We use a multi-frequency diffraction tomography imaging technique in which coherent backward propagations of the received reflected wavefield form a spatial image of the scattering interfaces within the region of interest. This imaging technique provides high-resolution range and azimuthal visualization of the subsurface region. We incorporate the ability to image in planarly layered conductive media and apply the algorithm to experimental data from an offset radar system in which the radar antenna is not directly coupled to the surface of the region. We present a rendering in three-dimensions of the resulting image data which provides high-detail visualization.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jeffrey E. Mast, Jeffrey E. Mast, Erik M. Johansson, Erik M. Johansson, } "Three-dimensional ground-penetrating radar imaging using multifrequency diffraction tomography", Proc. SPIE 2275, Advanced Microwave and Millimeter-Wave Detectors, (14 September 1994); doi: 10.1117/12.186716; https://doi.org/10.1117/12.186716

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