PSInSAR Analysis over the Three Gorges Dam and urban areas in China

In this work we present the results achieved within the Dragon project, cooperation program between the European Space Agency (ESA) and the National Remote Sensing Center of China (NRSCC), about monitoring the terrain motion in urban areas, measuring the city growth rate and analyzing the stability of big manmade structures. Among the processed areas, we report here the main results we obtained in the test sites of Shanghai, Tianjin and Three Gorges. The techniques that have been used to process the data are classical SAR interferometry (InSAR), Permanent Scatterers (PSInSAR) and a combination of coherent-uncoherent analysis. Particular attention is worth to be paid to the analysis of the Three Gorges Dam, biggest hydroelectric plant in the world, in which stability and characteristics of its scattering structures have been studied.