Advances in Earth Science ›› 2010, Vol. 25 ›› Issue (4): 428-434. doi: 10.11867/j.issn.1001-8166.2010.04.0428
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Zhu Yefei 1,Chen Huogeng 1, Zhang Denming 1,Wu Jianqiang 1,Wu Shuliang 1,Zhang Jingfa 2,Luo Yi 2
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Zhu Yefei,Chen Huogeng, Zhang Denming,Wu Jianqiang,Wu Shuliang,Zhang Jingfa. Subsidence of Suzhou Area from 1995 to 2000 detected by Persistent Scatterers for SAR Interferometry Technique[J]. Advances in Earth Science, 2010, 25(4): 428-434.
The Permanent Scatterers technique can reduce the spatial and temporal decorrelation by using a time series of SAR images and it has more accuracy, higher temporal resolution and utilization efficiency compared with traditional D-InSAR. However ,with this technique some limitation should be noticed. For example, only small areas could be processed. Based on the fragmenting method, PS-InSAR map from 1995 to 2000 with high spatial detail and resolution of range displacement was developed in Suzhou area，using radar data collected from ERS-2 satellite.The results validated by leveling surveys indicate that the accuracy of PS-InSAR observations reaches 5 mm. We concluded that for the mapping of land subsidence in urban environments PS-InSAR had a strong potential with regard to cost effectiveness，resolution and accuracy.