caa a22 4500 445300612 CHVBK 20180317142556.0 cr unu---uuuuu 170323e20100401xx s 000 0 eng 10.1007/s11430-010-0023-1 doi (NATIONALLICENCE)springer-10.1007/s11430-010-0023-1 Inferring three-dimensional surface displacement field by combining SAR interferometric phase and amplitude information of ascending and descending orbits [Elektronische Daten] [Jun Hu, ZhiWei Li, JianJun Zhu, XiaoChong Ren, XiaoLi Ding] Conventional Interferometric Synthetic Aperture Radar (InSAR) technology can only measure one-dimensional surface displacement (along the radar line-of-sight (LOS) direction). Here we presents a method to infer three-dimensional surface displacement field by combining SAR interferometric phase and amplitude information of ascending and descending orbits. The method is realized in three steps: (1) measuring surface displacements along the LOS directions of both ascending and descending orbits based on interferometric phases; (2) measuring surface displacements along the azimuth directions of both the ascending and descending orbits based on the SAR amplitude data; and (3) estimating the three-dimensional (3D) surface displacement field by combining the above four independent one-dimensional displacements using the method of least squares and Helmert variance component estimation. We apply the method to infer the 3D surface displacement field caused by the 2003 Bam, Iran, earthquake. The results reveal that in the northern part of Bam the ground surface experienced both subsidence and southwestward horizontal movement, while in the southern part uplift and southeastward horizontal movement occurred. The displacement field thus determined matches the location of the fault very well with the maximal displacements reaching 22, 40, and 30 cm, respectively in the up, northing and easting directions. Finally, we compare the 3D displacement field with that simulated from the Okada model. The results demonstrate that the method presented here can be used to generate reliable and highly accurate 3D surface displacement fields. Science in China Press and Springer-Verlag Berlin Heidelberg, 2010 InSAR nationallicence amplitude matching nationallicence azimuth offset nationallicence three-dimensional surface displacement nationallicence Bam earthquake nationallicence Hu Jun Department of Survey Engineering and Geomatics, Central South University, 410083, Changsha, China aut Li ZhiWei Department of Survey Engineering and Geomatics, Central South University, 410083, Changsha, China aut Zhu JianJun Department of Survey Engineering and Geomatics, Central South University, 410083, Changsha, China aut Ren XiaoChong Department of Survey Engineering and Geomatics, Central South University, 410083, Changsha, China aut Ding XiaoLi Department of Land Surveying and Geo-Informatics, The Hong Kong Polytechnic University, Hong Kong, China aut Science China Earth Sciences SP Science China Press 53/4(2010-04-01), 550-560 1674-7313 53:4<550 2010 53 11430 https://doi.org/10.1007/s11430-010-0023-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11430-010-0023-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hu Jun Department of Survey Engineering and Geomatics, Central South University, 410083, Changsha, China aut NATIONALLICENCE 700 1- Li ZhiWei Department of Survey Engineering and Geomatics, Central South University, 410083, Changsha, China aut NATIONALLICENCE 700 1- Zhu JianJun Department of Survey Engineering and Geomatics, Central South University, 410083, Changsha, China aut NATIONALLICENCE 700 1- Ren XiaoChong Department of Survey Engineering and Geomatics, Central South University, 410083, Changsha, China aut NATIONALLICENCE 700 1- Ding XiaoLi Department of Land Surveying and Geo-Informatics, The Hong Kong Polytechnic University, Hong Kong, China aut NATIONALLICENCE 773 0- Science China Earth Sciences SP Science China Press 53/4(2010-04-01), 550-560 1674-7313 53:4<550 2010 53 11430 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer