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| | Abstract | | Recent ground-penetrating radar (GPR) has several transmitter and receiver antennas and can acquire multi-survey records in a survey scan. We have a future plan to image small scatterers using high dense GPR data. However, the accuracy of GNSS geodetic positions is insufficient to joint two or more sets of survey records acquired in different scans. We show the way to modify initial GNSS positions to spatial smooth locations. We acquired multi-channel GPR records with GNSS measurements on a round test road in PWRI. Our multi-channel records include different offset records and we can estimate RMS velocities for target boundaries. NMO correction was applied for all GPR data using estimated velocities. Reflections from buried pipes and boundaries of road structures are clearly identified in depth slice sections. However, more accurate positioning technology will be desired to joint or stack multi records acquired in different scans. |
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