Non-uniform phase filter for Tiangong-2 Interferometric Imaging Radar Altimeter
The 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...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-07-01
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| Series: | The Journal of Engineering |
| Subjects: | |
| Online Access: | https://digital-library.theiet.org/content/journals/10.1049/joe.2019.0430 |
| _version_ | 1818426132595212288 |
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| author | Xiao Dong Yunhua Zhang Yunhua Zhang |
| author_facet | Xiao Dong Yunhua Zhang Yunhua Zhang |
| author_sort | Xiao Dong |
| collection | DOAJ |
| description | The 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. |
| first_indexed | 2024-12-14T14:24:58Z |
| format | Article |
| id | doaj.art-cd39dc5ba8004eb3911f6fe88805f0da |
| institution | Directory Open Access Journal |
| issn | 2051-3305 |
| language | English |
| last_indexed | 2024-12-14T14:24:58Z |
| publishDate | 2019-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Journal of Engineering |
| spelling | doaj.art-cd39dc5ba8004eb3911f6fe88805f0da2022-12-21T22:57:59ZengWileyThe Journal of Engineering2051-33052019-07-0110.1049/joe.2019.0430JOE.2019.0430Non-uniform phase filter for Tiangong-2 Interferometric Imaging Radar AltimeterXiao Dong0Yunhua Zhang1Yunhua Zhang2National Space Science CenterNational Space Science CenterNational Space Science CenterThe 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.https://digital-library.theiet.org/content/journals/10.1049/joe.2019.0430radar interferometryradar altimetryradar imagingtopography (Earth)digital elevation modelsoceanographic techniquesremote sensing by radarsynthetic aperture radarnonuniform windowsTiangong-2 InIRA datanonuniform filtering methodnonuniform phase filterTiangong-2 interferometric imaging radar altimeterChinese Tiangong-2 space laboratorywide-swath ocean topographytraditional interferometric synthetic aperture radardigital elevation modelland surfaceocean surfaceinterferometric phase noiseocean height measurementstraditional InSARheight errorinterferometric imaging radar altimeterKu-band interferometric radar |
| spellingShingle | Xiao Dong Yunhua Zhang Yunhua Zhang Non-uniform phase filter for Tiangong-2 Interferometric Imaging Radar Altimeter The Journal of Engineering radar interferometry radar altimetry radar imaging topography (Earth) digital elevation models oceanographic techniques remote sensing by radar synthetic aperture radar nonuniform windows Tiangong-2 InIRA data nonuniform filtering method nonuniform phase filter Tiangong-2 interferometric imaging radar altimeter Chinese Tiangong-2 space laboratory wide-swath ocean topography traditional interferometric synthetic aperture radar digital elevation model land surface ocean surface interferometric phase noise ocean height measurements traditional InSAR height error interferometric imaging radar altimeter Ku-band interferometric radar |
| title | Non-uniform phase filter for Tiangong-2 Interferometric Imaging Radar Altimeter |
| title_full | Non-uniform phase filter for Tiangong-2 Interferometric Imaging Radar Altimeter |
| title_fullStr | Non-uniform phase filter for Tiangong-2 Interferometric Imaging Radar Altimeter |
| title_full_unstemmed | Non-uniform phase filter for Tiangong-2 Interferometric Imaging Radar Altimeter |
| title_short | Non-uniform phase filter for Tiangong-2 Interferometric Imaging Radar Altimeter |
| title_sort | non uniform phase filter for tiangong 2 interferometric imaging radar altimeter |
| topic | radar interferometry radar altimetry radar imaging topography (Earth) digital elevation models oceanographic techniques remote sensing by radar synthetic aperture radar nonuniform windows Tiangong-2 InIRA data nonuniform filtering method nonuniform phase filter Tiangong-2 interferometric imaging radar altimeter Chinese Tiangong-2 space laboratory wide-swath ocean topography traditional interferometric synthetic aperture radar digital elevation model land surface ocean surface interferometric phase noise ocean height measurements traditional InSAR height error interferometric imaging radar altimeter Ku-band interferometric radar |
| url | https://digital-library.theiet.org/content/journals/10.1049/joe.2019.0430 |
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