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| | Abstract | | Humanitarian demining has been conducted to clear landmines left after conflicts. Electromagnetic Induction (EMI) sensor is the most common tool for detection of buried mines, however, it responds to not only landmines but also other metal fragments. Advanced Landmine Imaging System (ALIS) developed by Tohoku University can be a solution with "Dual Sensor", the combination of the EMI sensor and Ground Penetrating Radar (GPR). The stand-off distance of the sensor from the ground correction of the hand-held GPR is proposed in this study. The arrival time of the ground surface reflection is changed to equal by correcting the phase at a frequency, where the reflection is dominant. Some parts of the reflection shifted from the original time and the shape of the target appeared more clearly. The Synthetic Aperture Radar (SAR) processing of ALIS is truncated at the edge of the imaging area. It makes some virtual images around there. The introduction of a windowing function was confirmed to suppress them. |
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