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Summary of Proposal LAN1841

TitleMonitoring the surface displacement of the Qinghai-Tibet Railway and its surroundings with TerraSAR-X data
Investigator Li, Zhiwei - Central South University, Department of Geomatics
Team Member
Prof. Zou, Zengrong - Central South University, Department of Geomatics
Associate Prof. Dai, Wujiao - Central South University, Department of Geomatics
Mr. Li, Jia - Central South University, Department of Geomatics
Mr. Xie, Qinghua - Central South University, Department of Geomatics
SummaryThis project aims to: (1) providea detail displacement map of the Qinghai-Tibet Railway with the TerraSAR-X interferometry; and (2) understand the interaction between the Qinghai-Tibet Railway and the Permafrost in the Qinghai-Tibet Plateau. For monitoring the displacement of the Qinghai-Tibet Railway with TerraSAR-X data, the conventional MT-InSAR will be developed to be applicable in the linear-shaped structure investigation. The persistent scatterer selection will be improved to be more robust in discriminating the linear-shaped structure and its surroundings. We will integrate the small baseline strategy adopted in the SBAS approach and the point pair difference algorithm used in the PS approach. This is very important to avoid the fringe aliasing induced by the topography and deformation, which is particularly serious in the TerraSAR-X interferometry. For investigating the interaction between the Qinghai-Tibet Railway and the Permafrost in the Qinghai-Tibet Plateau, the seasonal oscillation of the Permafrostin the Qinghai-Tibet Plateau will be estimated together with the displacement of the Qinghai-Tibet Railway. We combine theSBAS approach and the seasonal displacement model to measure the seasonal oscillation of the Permafrost. The comparison and fusion between the deformations of the Qinghai-TibetRailway and the Permafrost in the Qinghai-Tibet Plateau will be carried out. The local temperature data will be used to analysis the rule of the deformations and forecast their future trends. The deliverables of this projectmay include: (1) displacement map of the Qinghai-Tibet Railway and the Permafrost in the Qinghai-Tibet Plateau; (2) MT-InSAR algorithms for the TerraSAR-X interferometry; and (3) a number of scientific publications. The studyis funded by the National Science Foundations of China (Modelling minimum and maximum detectable deformation gradients of interferometric SAR measurements), the Internal funding of Central South University (Development of Multi-Platform InSAR Technology), and the National High-tech Program of China (Integrating GPS, CornerReflector and InSAR for Highway Monitoring).

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DLR 2004-2016