EXTRACTING COSEISMIC DEFORMATION FIELD RELATED TO WENCHUAN Ms8.0 EARTHQUAKE BY USE OF ALOS DInSAR
Zhang Huixin 1) ; Liu Guoxiang 2) ; Zhang Rui 2) ; and Jia Hongguo 2)
1)School of Civil and Transportation Engineering, Sichuan College of Education, Chengdu 6111302)Dept. of Surveying Engineering, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031
Abstract In order to detect surface deformation caused by the Wenchuan Ms8.0 earthquake, the twopass differential interferometric synthetic aperture radar (DInSAR) method is employed for analyzing the ground displacement due to the main shock by using both the ALOS satellite PALSAR Lband SAR data and GPS data. We computed the coseismic interferogram and the deformation field with spatial resolution of 15 m in an area of about 83 194 km 2. Moreover, the accuracy of deformation values derived interferometrically is evaluated by taking the GPS measurements at 16 sites as the reference data. The results show that the two types of measurements are in good agreement, except that there exist remarkable discrepancy in the nearfault areas.
Zhang Huixin ,Liu Guoxiang ,Zhang Rui et al. EXTRACTING COSEISMIC DEFORMATION FIELD RELATED TO WENCHUAN Ms8.0 EARTHQUAKE BY USE OF ALOS DInSAR[J]. , 2011, 31(2): 32-37.
Zhang Huixin ,Liu Guoxiang ,Zhang Rui et al. EXTRACTING COSEISMIC DEFORMATION FIELD RELATED TO WENCHUAN Ms8.0 EARTHQUAKE BY USE OF ALOS DInSAR[J]. jgg, 2011, 31(2): 32-37.
