Mapping displacement around Tokyo International Airport after the Great East Japan Earthquake 2011 derived from TerraSAR-X imageries

Ground displacement around Tokyo International Airport after the Great East Japan Earthquake 2011 was estimated by the applying the sub-pixel matching methodology. We utilized the method to 21 TerraSAR-X data sets with 1.25 m pixel spacing first, and revealed that the accuracy was about 0.2 m in x direction, and better than 0.1 m in y direction by comparing with the referenced GNSS observation data. The accuracy depends on the ratio of detected values which is related to the correlation coefficients. From the map of the displacement between pre- and post- earthquake, the displacement in landfill area was noticed significant larger than the referenced area.