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Summary of Proposal GEO3353

TitleLandslide deformation mapping by exploitation of both amplitude and phase information of TerraSAR-X/ TanDEM-X data stack
Investigator Zhang, Lu - Wuhan University, State Key Laboratory of Information Engineering in Surveying, Mapping and Remote
Team Member
Prof. Liao, Mingsheng - Wuhan University, LIESMARS
Dr. Balz, Timo - Wuhan University, LIESMARS
SummaryThe mountainous and valley area of Danba County in western Sichuan Province is taken as our test site. From our previous study, it has been revealed that several big landslides are distributed along major rivers in Danba. Therefore, in this project, studies will be focused on detecting and monitoring landslide movements over various time scales using TerraSAR-X data stacks. Detailed researches will be carried out in the following aspects. (1) Due to the complicated environment of mountainous areas, the number of persistent scatterers (PS) are limited. So the distributed scatterers (DS) will be employed to increase measurement points. DSs are jointly analyzed with PSs using the traditional PSI algorithm for the estimation of the displacement time-series of each measurement point. (2) PTOT method making full use of the bright scatters in SAR images will be utilized to monitor fast moving landslides. The displacements in the azimuth and range directions can be obtained for each measurement point. (3) The driving factors and mechanisms behind the spatial-temporal evolution of landslide surface deformation will be sorted out by correlation analyses with the supports from engineering geologists.

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