Modified four-pass differential SAR interferometry for estimating mountain glacier surface velocity fields

	Modified four-pass differential SAR interferometry for estimating mountain glacier surface velocity fields
	Liu, Guang 1; Guo, Huadong 1; Yue, Huanyin 1; Perski, Zbigniew 1; Yan, Shiyong 1; Song, Rui 1; Fan, Jinghui 1; Ruan, Zhixing 1
刊名	Remote Sensing Letters
	2016
卷号	7 期号:1 页码:1-10
关键词	SURFACE REGISTRATION
通讯作者	Liu, Guang (liug@ceode.ac.cn)
英文摘要	Conventional four-pass differential synthetic aperture radar interferometry (DInSAR) assumes that there are no significant changes in the ground during the period between the acquisition times of SAR images for topographic DInSAR pairs. This assumption can rarely be satisfied for glacial areas due to their continuous movement. This letter proposes a modified four-pass DInSAR method without an external digital elevation model (DEM), taking into account glacier movement between the acquisition times of SAR images used to form topographic DInSAR pairs. An explicit expression of theoretical formulas for a modified four-pass DInSAR technique was derived for the first time, revealing that four-pass DInSAR considering ground movement of topographic pairs was equivalent to that of conventional four-pass DInSAR with a spatially varying nominal wavelength. Then the proposed method was tested with four Advanced Land Observing Satellite (ALOS) SAR images covering Dongkemadi glacier located on the Tibetan Plateau, China. An experiment with real data showed that the proposed method could obtain glacial flow patterns efficiently, and that the difference between two-pass DInSAR and the proposed method is a result of DEM bias and glacial thinning. The approach presented in this letter proved to be appropriate for monitoring glacial motion and provides a valuable tool for glacier studies, without the need of an external DEM. © 2015 The Author(s). Published by Taylor & Francis.
学科主题	Remote Sensing; Imaging Science & Photographic Technology
类目[WOS]	Remote Sensing ; Imaging Science & Photographic Technology
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:20154801625866
内容类型	期刊论文
源URL	[http://ir.radi.ac.cn/handle/183411/39344]
专题	遥感与数字地球研究所_SCI/EI期刊论文_期刊论文
作者单位	1. Key Laboratory of Digital Earth Sciences, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, China 2. National Remote Sensing Center, Ministry of Science and Technology, Beijing, China 3. Pastwowy Instytut Geologiczny, Carpathian Branch, Cracow, Poland 4. Jiangsu Key Laboratory of Resources and Environmental Engineering, School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, China 5. Remote Sensing Division, China Aero Geophysical Survey and Remote Sensing Center for Land and Resources (AGRS), Beijing, China
推荐引用方式 GB/T 7714	Liu, Guang,Guo, Huadong,Yue, Huanyin,et al. Modified four-pass differential SAR interferometry for estimating mountain glacier surface velocity fields[J]. Remote Sensing Letters,2016,7(1):1-10.
APA	Liu, Guang.,Guo, Huadong.,Yue, Huanyin.,Perski, Zbigniew.,Yan, Shiyong.,...&Ruan, Zhixing.(2016).Modified four-pass differential SAR interferometry for estimating mountain glacier surface velocity fields.Remote Sensing Letters,7(1),1-10.
MLA	Liu, Guang,et al."Modified four-pass differential SAR interferometry for estimating mountain glacier surface velocity fields".Remote Sensing Letters 7.1(2016):1-10.