High-Resolution and Wide-Swath 3D Imaging for Urban Areas Based on Distributed Spaceborne SAR
Tomographic synthetic aperture radar (TomoSAR) obtains elevation resolution by adding multiple baselines successively in the direction perpendicular to the line of sight, thereby realizing three-dimensional (3D) reconstruction of complex scenes and significantly promoting the development of the 3D a...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-08-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/15/16/3938 |
| _version_ | 1797583374991228928 |
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| author | Yaqian Yang Fubo Zhang Ye Tian Longyong Chen Robert Wang Yirong Wu |
| author_facet | Yaqian Yang Fubo Zhang Ye Tian Longyong Chen Robert Wang Yirong Wu |
| author_sort | Yaqian Yang |
| collection | DOAJ |
| description | Tomographic synthetic aperture radar (TomoSAR) obtains elevation resolution by adding multiple baselines successively in the direction perpendicular to the line of sight, thereby realizing three-dimensional (3D) reconstruction of complex scenes and significantly promoting the development of the 3D application field. However, a large data redundancy and long mapping time in traditional 3D imaging lead to a large data transmission burden, low efficiency, and high costs. To solve the above problems, this paper proposes a distributed SAR high-resolution and wide-swath (HRWS) 3D imaging technology scheme. The proposed scheme overcomes the size limitation of traditional single-satellite antennas through the multi-channel arrangement of multiple satellites in the elevation direction to achieve HRWS imaging; meanwhile, the distributed SAR system is integrated with tomographic processing technology to realize 3D imaging of difficult areas by using the elevation directional resolution of TomoSAR systems. HRWS 3D SAR increases the baseline length and channel number by transmission in turn, which leads to excessive pulse repetition frequency and causes echoes of different pulse signals to overlap in the same receiving cycle, resulting in range ambiguity and thus seriously affecting the quality of the 3D reconstruction. To solve this problem, this paper proposes a range ambiguity resolution algorithm based on multi-beam forming and verifies it on the measured data from airborne array SAR. Compared with the traditional TomoSAR, the distributed HRWS 3D SAR scheme proposed in this paper can obtain a greater mapping bandwidth with the same resolution in a single flight, thereby enhancing the time correlation, reducing data redundancy, and greatly improving mapping efficiency. |
| first_indexed | 2024-03-10T23:37:02Z |
| format | Article |
| id | doaj.art-dc15e9d5c84642ea9a53867af4946c40 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-10T23:37:02Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-dc15e9d5c84642ea9a53867af4946c402023-11-19T02:52:14ZengMDPI AGRemote Sensing2072-42922023-08-011516393810.3390/rs15163938High-Resolution and Wide-Swath 3D Imaging for Urban Areas Based on Distributed Spaceborne SARYaqian Yang0Fubo Zhang1Ye Tian2Longyong Chen3Robert Wang4Yirong Wu5National Key Laboratory of Microwave Imaging Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, ChinaNational Key Laboratory of Microwave Imaging Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, ChinaNational Key Laboratory of Microwave Imaging Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, ChinaNational Key Laboratory of Microwave Imaging Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, ChinaNational Key Laboratory of Microwave Imaging Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, ChinaNational Key Laboratory of Microwave Imaging Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, ChinaTomographic synthetic aperture radar (TomoSAR) obtains elevation resolution by adding multiple baselines successively in the direction perpendicular to the line of sight, thereby realizing three-dimensional (3D) reconstruction of complex scenes and significantly promoting the development of the 3D application field. However, a large data redundancy and long mapping time in traditional 3D imaging lead to a large data transmission burden, low efficiency, and high costs. To solve the above problems, this paper proposes a distributed SAR high-resolution and wide-swath (HRWS) 3D imaging technology scheme. The proposed scheme overcomes the size limitation of traditional single-satellite antennas through the multi-channel arrangement of multiple satellites in the elevation direction to achieve HRWS imaging; meanwhile, the distributed SAR system is integrated with tomographic processing technology to realize 3D imaging of difficult areas by using the elevation directional resolution of TomoSAR systems. HRWS 3D SAR increases the baseline length and channel number by transmission in turn, which leads to excessive pulse repetition frequency and causes echoes of different pulse signals to overlap in the same receiving cycle, resulting in range ambiguity and thus seriously affecting the quality of the 3D reconstruction. To solve this problem, this paper proposes a range ambiguity resolution algorithm based on multi-beam forming and verifies it on the measured data from airborne array SAR. Compared with the traditional TomoSAR, the distributed HRWS 3D SAR scheme proposed in this paper can obtain a greater mapping bandwidth with the same resolution in a single flight, thereby enhancing the time correlation, reducing data redundancy, and greatly improving mapping efficiency.https://www.mdpi.com/2072-4292/15/16/3938distributed spaceborne SARHRWS imaging3D reconstructionrange ambiguity resolution |
| spellingShingle | Yaqian Yang Fubo Zhang Ye Tian Longyong Chen Robert Wang Yirong Wu High-Resolution and Wide-Swath 3D Imaging for Urban Areas Based on Distributed Spaceborne SAR Remote Sensing distributed spaceborne SAR HRWS imaging 3D reconstruction range ambiguity resolution |
| title | High-Resolution and Wide-Swath 3D Imaging for Urban Areas Based on Distributed Spaceborne SAR |
| title_full | High-Resolution and Wide-Swath 3D Imaging for Urban Areas Based on Distributed Spaceborne SAR |
| title_fullStr | High-Resolution and Wide-Swath 3D Imaging for Urban Areas Based on Distributed Spaceborne SAR |
| title_full_unstemmed | High-Resolution and Wide-Swath 3D Imaging for Urban Areas Based on Distributed Spaceborne SAR |
| title_short | High-Resolution and Wide-Swath 3D Imaging for Urban Areas Based on Distributed Spaceborne SAR |
| title_sort | high resolution and wide swath 3d imaging for urban areas based on distributed spaceborne sar |
| topic | distributed spaceborne SAR HRWS imaging 3D reconstruction range ambiguity resolution |
| url | https://www.mdpi.com/2072-4292/15/16/3938 |
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