DONG Xiaoyan, DING Xiaoli, LI Zhiwei, WANG Yongzhe. A New Chain for SAR Pixel Offset Estimation and Its Application in Co-seismic Deformation Measurement[J]. Geomatics and Information Science of Wuhan University, 2011, 36(7): 789-792.
Citation: DONG Xiaoyan, DING Xiaoli, LI Zhiwei, WANG Yongzhe. A New Chain for SAR Pixel Offset Estimation and Its Application in Co-seismic Deformation Measurement[J]. Geomatics and Information Science of Wuhan University, 2011, 36(7): 789-792.

A New Chain for SAR Pixel Offset Estimation and Its Application in Co-seismic Deformation Measurement

Funds: 国家自然科学基金资助项目(40974006,40774003,40901172);国家教育部新世纪优秀人才支持计划资助项目(NCET-08-0570);湖南省高校创新平台开放研究基金资助项目(09K005);湖南省科技厅重大专项基金资助项目(2008FJ1006)
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  • Received Date: April 25, 2011
  • Published Date: July 04, 2011
  • The traditional methods for estimating pixel offsets of two SAR images use the orbit offsets of several points to fit the orbit offsets of the whole image by using the least squares rule,and then removes them from the total offsets.However,the procedures of data processing are quite complicated.What's more,without GCPS,this method contained many kinds of error sources which lead to low precision.To overcome these limits,this paper presents a new simple data processing chain for calculating co-seismic offsets which need no GPS data.In order to compare the precision of two methods,we take the Ms6.6 Bam earthquake occurred in 2003 as an example.First,we processed two SAR images acquired before earthquake with the traditional and the new pixel offset methods respectively.The results show an improvement of 0.224 pixels in precision for the new method.Second,we applied the new and the traditional method to process two images acquired before and after the earthquake.The results indicate that the new method has a higher efficiency and precision.
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