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Non-uniform phase filter for Tiangong-2 Interferometric Imaging Radar Altimeter
Dong, Xiao1; Zhang, Yunhua1,2
Source PublicationJournal of Engineering
AbstractThe interferometric imaging radar altimeter (InIRA) on-board Chinese Tiangong-2 space laboratory is a Ku-band interferometric radar whose major aim is to measure the wide-swath ocean topography. Unlike traditional interferometric synthetic aperture radar (InSAR) aiming at measuring digital elevation model of land surface, Tiangong-2 InIRA adopts small incidence angles and short baseline to get strong and high coherency reflections from ocean surface. The interferometric phase noise is a notable source of errors which limits the accuracy of the ocean height measurements. Compared with traditional InSAR, the height error of Tiangong-2 InIRA shows different distribution pattern due to the absolutely small but relatively large variation incidence angles. This study gives a filtering method for interferometric phase generated with small incidence angles and short baseline. Non-uniform windows are selected according to the relation between the coherence, imaging geometry, and the height variation. Results on Tiangong-2 InIRA data are analysed by comparing the non-uniform filtering method with traditional multi-looking method. © 2019 Institution of Engineering and Technology. All rights reserved.
Conference NameIET International Radar Conference 2018, IRC 2018
Conference DateOctober 17, 2018 - October 19, 2018
Conference PlaceNanjing City, China
Indexed ByEI
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Document Type会议论文
Affiliation1.CAS Key Laboratory of Microwave Remote Sensing, National Space Science Center, Chinese Academy of Sciences, No.1 Nanertiao Zhongguancun, Haidian, Beijing, China;
2.University of Chinese Academy of Sciences, 19 A Yuquan Rd, Shijingshan, Beijing, China
Recommended Citation
GB/T 7714
Dong, Xiao,Zhang, Yunhua. Non-uniform phase filter for Tiangong-2 Interferometric Imaging Radar Altimeter[C],2019:5610-5613.
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