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Proceedings Paper

Mapping surface deformation related to the 2008 Wenchuan earthquake with ALOS InSAR and GPS observations
Author(s): Guoxiang Liu; Jicang Wu; Jonathan Li; Qiang Chen; Jun Qin; Huixin Zhang; Rui Zhang; Hongguo Jia; Xiaojun Luo
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Paper Abstract

The Ms8.0 Wenchuan earthquake occurred on May 12, 2008 in Wenchuan County, Sichuan Province, China. The devastating event caused a significant surface rupture and deformation in a large geographical area. This study intends to investigate the co-seismic surface deformations due to the main shock by integrating observations from interferometric synthetic aperture radar (InSAR) and global positioning system (GPS). The InSAR measurements in an area of more than 83,000 km2 are extracted from 46 SAR images that were acquired along 6 adjacent ascending orbits by the ALOS L-band PALSAR sensor. The three-dimensional displacements measured at 16 GPS stations are used to validate and calibrate the InSAR measurements by a least squares fitting, and thus removing the unwanted components due to atmospheric delay, orbital uncertainty and topographic bias. The preliminary results show that such an integrated method is useful for mapping the co-seismic surface deformation.

Paper Details

Date Published: 9 October 2009
PDF: 8 pages
Proc. SPIE 7471, Second International Conference on Earth Observation for Global Changes, 74711N (9 October 2009); doi: 10.1117/12.836306
Show Author Affiliations
Guoxiang Liu, Southwest Jiaotong Univ. (China)
Jicang Wu, Tongji Univ. (China)
Jonathan Li, Univ. of Waterloo (Canada)
Qiang Chen, Southwest Jiaotong Univ. (China)
Jun Qin, Southwest Jiaotong Univ. (China)
Huixin Zhang, Southwest Jiaotong Univ. (China)
Rui Zhang, Southwest Jiaotong Univ. (China)
Hongguo Jia, Southwest Jiaotong Univ. (China)
Xiaojun Luo, Southwest Jiaotong Univ. (China)

Published in SPIE Proceedings Vol. 7471:
Second International Conference on Earth Observation for Global Changes
Xianfeng Zhang; Jonathan Li; Guoxiang Liu; Xiaojun Yang, Editor(s)

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