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| | Abstract | | Ground-based synthetic aperture radar (GB-SAR) was installed to monitor a post-landslide surface. GB-SAR can detect a very small movement of a target by measuring the same scene repeatedly and using radar interferometry, which uses the phase information of radar signals. The results showed almost no movements or deformation of the landslide surface for a couple of weeks. The same system was used to monitor movements of the ground in a coastal area damaged by the tsunami after the Great East Japan Earthquake. The monitoring within a seven-day-period showed about 5 mm movement of the ground in a quayside, and it seems to be correlated with the change in the tide level. The work demonstrated the capability of GB-SAR technique in monitoring a wide area with high accuracy. |
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