收稿日期: 2009-11-06
修回日期: 2010-01-15
网络出版日期: 2010-04-10
Subsidence of Suzhou Area from 1995 to 2000 detected by Persistent Scatterers for SAR Interferometry Technique
Received date: 2009-11-06
Revised date: 2010-01-15
Online published: 2010-04-10
朱叶飞 . 基于PS-InSAR的1995—2000年苏州地面沉降监测[J]. 地球科学进展, 2010 , 25(4) : 428 -434 . DOI: 10.11867/j.issn.1001-8166.2010.04.0428
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.
Key words: PS-InSAR; Fragment; Suzhou; Subsidence; ERS2
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