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| | Abstract | | Borehole radar is a geophysical survey method that is applied to several fields. One of them is the monitoring of water diffusion in the subsurface. It is important to not only estimate the geological structure in the subsurface but also measure the quantity of water in the subsurface. However the traditional system of borehole radar has a limitation of their measurement capability to detect a variation of received waveforms, especially a time of a leading edge. Using an optical sensor array, we are possible to acquire more precise receiving signals to monitor a variation of water distribution in the subsurface. |
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