Ground deformation monitoring in Pearl River Delta region with Stacking D-InSAR technique
The main problems,temporal and geometrical decorrelation,atmospheric signal,limited the analysis and interpretation of Differential SAR (D-InSAR) interferometric signal.The Permanent Scatterers (PS) Technique which can detect discrete and temporarily stable natural reflectors using at least 25 images was developed shortly after.However,for some regions,there are not enough available archived SAR images.The Stacking D-InSAR technique,using a stack of SAR images (<20scenes),with the generated a set of unwrapped differential interferograms,can estimate the linear differential phase rate.This research employs 6 ENVISAT ASAR images to study the ground deformation in The Pearl River Delta region with Stacking D-INSAR technique.Obvious ground subsidence trend is found around Guang Zhou,Fo Shan and Dong Guan where the urbanization process was very fast in the past 20 years.In order to validate the stacking result,Persistent Scatterer technique with limited images is also applied.From the deformation velocity map obtained by stacking technique,it is found the deformation velocity rate at some places seems higher.The main reason is probably the presence of atmospheric artifacts.The deformation trend shown in both Stacking technique and the Persistent Scatterer technique result are consistent in Haizhu district and Yuexiu district in Guangzhou.
ground deformation D-InSAR Stacking D-InSAR technique Persistent Scatterer technique Pearl River Delta
Zhao Qing LIN Hui JIANG Liming
Institute of Space and Earth Information Science,Room 615,Esther Lee Building,The Chinese University of Hong Kong,Shatin,N.T.,Hong Kong,China
国际会议
第16届国际地理信息科学与技术大会(16th International Conference on GeoInformatics and the Joint Conference)
广州
英文
2008-06-28（万方平台首次上网日期，不代表论文的发表时间）