Abstract
In this paper, we demonstrate 3-D estimation of reflectors with singlehole borehole radar. We use the dipole array antennas fed by coaxial cables as a directional antenna. Finding the phase shift among the array elements and different depths, we estimate the 3-D positions of the reflector. In the field test site, there is an interface, and we have the preliminary information on the reflector with boring core sampling. The 3-D estimation results with the directional borehole radar were reasonable.
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