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Summary of Proposal GEO0714

TitleApplication of TerraSAR-X Interferometry to deformation monitoring in New Zealand
Investigator Motagh, Mahdi - Helmholtz Center Potsdam, GFZ, Geodesy and Remote Sensing
Team Member
Dr. Beavan, John - GNS Science, Natural Hazards
Dr. Massey, Chris - GNS Science, Natural Hazards
Dr. Brackley, Hannah - GNS Science, Natural Hazards
SummaryWe will conduct research to assess the interferometric capabilities of TerraSAR-X data to detect and measure slow moving landslides in New Zealand. Some ground-based geodetic techniques such as GPS and Electronic Distance Measurement (EDM) instruments are currently being used in NZ at some sites such as the Taihape and Utiku landslides to monitor ground movement. The main limitation of these techniques is that they only provide point-wise information, and therefore do not fully capture the spatial extent of the moving area. TSX Interferometry is able to map the complete movement pattern of a landslide with sub-centimeter accuracy at a spatial resolution of 2-10 meters. We will utilize advanced InSAR processing techniques such as stacking, permanent scatterers (PS), and small baseline subsets (SBAS) to detect and measure ground deformation over time. If necessary, artificial corner reflectors that are easily identifiable in SAR imagery will be installed in the study areas to improve the reliability of InSAR time-series measurements.

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