An Imaging Method for Spaceborne Cooperative Multistatic SAR Formations With Nonzero Cross-Track Baselines
Spaceborne multistatic synthetic aperture radar (M-SAR) formations can deploy multiple spatially separated receiving phase centers along the along-track (AT) direction to achieve high-resolution wide-swath. However, the cross-track (XT) separation between the spacecraft is inevitable due to the form...
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| Format: | Article |
| Language: | English |
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IEEE
2022-01-01
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| Series: | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/9910383/ |
| _version_ | 1797946341829115904 |
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| author | Haoyu Lin Yunkai Deng Heng Zhang Da Liang Xiaoxue Jia |
| author_facet | Haoyu Lin Yunkai Deng Heng Zhang Da Liang Xiaoxue Jia |
| author_sort | Haoyu Lin |
| collection | DOAJ |
| description | Spaceborne multistatic synthetic aperture radar (M-SAR) formations can deploy multiple spatially separated receiving phase centers along the along-track (AT) direction to achieve high-resolution wide-swath. However, the cross-track (XT) separation between the spacecraft is inevitable due to the formation design like orbital safety and application potential like the XT interferometry. In addition, the different motion vectors of two or more satellites caused by the Helix formation will lead to the difference of the Doppler parameters at the same range gate. Therefore, nonzero XT baselines and space-variant characteristics pose new challenges to the focusing and phase-preserving of the M-SAR imaging. To this end, an imaging method for spaceborne cooperative M-SAR formations with nonzero XT baselines is proposed in this article. Firstly, a spaceborne cooperative M-SAR formation is demonstrated. Afterward, the imaging method is described in detail. The motion compensation technology and the idea of partitioned equivalent velocity are adopted to solve the problems of nonzero XT baselines and space-variant characteristics, respectively. Finally, the simulations of point targets and distributed targets are carried out to verify the proposed method, and the results show that the precise focusing of spaceborne cooperative M-SAR with nonzero XT baselines can be achieved by the proposed imaging method. |
| first_indexed | 2024-04-10T21:09:30Z |
| format | Article |
| id | doaj.art-104d614afecf4e2abf27d9b9519aea43 |
| institution | Directory Open Access Journal |
| issn | 2151-1535 |
| language | English |
| last_indexed | 2024-04-10T21:09:30Z |
| publishDate | 2022-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
| spelling | doaj.art-104d614afecf4e2abf27d9b9519aea432023-01-21T00:00:07ZengIEEEIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing2151-15352022-01-01158541855110.1109/JSTARS.2022.32118549910383An Imaging Method for Spaceborne Cooperative Multistatic SAR Formations With Nonzero Cross-Track BaselinesHaoyu Lin0https://orcid.org/0000-0002-7074-7519Yunkai Deng1Heng Zhang2https://orcid.org/0000-0003-3635-5826Da Liang3https://orcid.org/0000-0002-9092-5298Xiaoxue Jia4https://orcid.org/0000-0003-0031-933XDepartment of Space Microwave Remote Sensing System, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, ChinaDepartment of Space Microwave Remote Sensing System, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, ChinaDepartment of Space Microwave Remote Sensing System, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, ChinaCollege of Marine Technology, Faculty of Information Science and Engineering, Ocean University of China, Qingdao, ChinaDepartment of Space Microwave Remote Sensing System, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, ChinaSpaceborne multistatic synthetic aperture radar (M-SAR) formations can deploy multiple spatially separated receiving phase centers along the along-track (AT) direction to achieve high-resolution wide-swath. However, the cross-track (XT) separation between the spacecraft is inevitable due to the formation design like orbital safety and application potential like the XT interferometry. In addition, the different motion vectors of two or more satellites caused by the Helix formation will lead to the difference of the Doppler parameters at the same range gate. Therefore, nonzero XT baselines and space-variant characteristics pose new challenges to the focusing and phase-preserving of the M-SAR imaging. To this end, an imaging method for spaceborne cooperative M-SAR formations with nonzero XT baselines is proposed in this article. Firstly, a spaceborne cooperative M-SAR formation is demonstrated. Afterward, the imaging method is described in detail. The motion compensation technology and the idea of partitioned equivalent velocity are adopted to solve the problems of nonzero XT baselines and space-variant characteristics, respectively. Finally, the simulations of point targets and distributed targets are carried out to verify the proposed method, and the results show that the precise focusing of spaceborne cooperative M-SAR with nonzero XT baselines can be achieved by the proposed imaging method.https://ieeexplore.ieee.org/document/9910383/M-SAR formationsM-SAR imaging processingmultistatic synthetic aperture radar (M-SAR)nonzero cross-track (XT) baselines |
| spellingShingle | Haoyu Lin Yunkai Deng Heng Zhang Da Liang Xiaoxue Jia An Imaging Method for Spaceborne Cooperative Multistatic SAR Formations With Nonzero Cross-Track Baselines IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing M-SAR formations M-SAR imaging processing multistatic synthetic aperture radar (M-SAR) nonzero cross-track (XT) baselines |
| title | An Imaging Method for Spaceborne Cooperative Multistatic SAR Formations With Nonzero Cross-Track Baselines |
| title_full | An Imaging Method for Spaceborne Cooperative Multistatic SAR Formations With Nonzero Cross-Track Baselines |
| title_fullStr | An Imaging Method for Spaceborne Cooperative Multistatic SAR Formations With Nonzero Cross-Track Baselines |
| title_full_unstemmed | An Imaging Method for Spaceborne Cooperative Multistatic SAR Formations With Nonzero Cross-Track Baselines |
| title_short | An Imaging Method for Spaceborne Cooperative Multistatic SAR Formations With Nonzero Cross-Track Baselines |
| title_sort | imaging method for spaceborne cooperative multistatic sar formations with nonzero cross track baselines |
| topic | M-SAR formations M-SAR imaging processing multistatic synthetic aperture radar (M-SAR) nonzero cross-track (XT) baselines |
| url | https://ieeexplore.ieee.org/document/9910383/ |
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