Comparison of Beijing-Tianjin Intercity Railway deformation monitoring results between ASAR and PALSAR data

First comparison experiments by different datasets were done to estimate the subsidence pattern of China Beijing-Tianjin Intercity Railway roadbed in Tianjin area in this paper. The multi-baseline differential synthetic aperture radar interferometry technique was used to give the subsidence monitoring. During the period of middle 2008 to middle 2009, the experiment results show that the roadbed is relative stable during the first year running of the Intercity Railway. And the comparison analyses show that both experiment results give the same subsidence rate pattern along the roadbed corridor, meanwhile the PALSAR results give better railway imaged but larger subsidence velocity standard deviation.