Range-Dependent Variance Correction Method for High-Resolution and Wide-Swath Spaceborne Synthetic Aperture Radar Imaging Based on Block Processing in Range Dimension
With increasing demands for SAR image applications, spaceborne SAR systems are evolving towards higher resolution and wider swath capabilities. However, these advancements lead to more pronounced range-dependent variance effects. Previous research has primarily focused on the impact of range-depende...
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| Format: | Article |
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MDPI AG
2024-12-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/17/1/50 |
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| author | Zhenyu Hou Zehua Zhang Pin Li Zhuo Yun Feng He Zhen Dong |
| author_facet | Zhenyu Hou Zehua Zhang Pin Li Zhuo Yun Feng He Zhen Dong |
| author_sort | Zhenyu Hou |
| collection | DOAJ |
| description | With increasing demands for SAR image applications, spaceborne SAR systems are evolving towards higher resolution and wider swath capabilities. However, these advancements lead to more pronounced range-dependent variance effects. Previous research has primarily focused on the impact of range-dependent variance on range cell migration and the quadratic phase of range frequency, while often neglecting the effects of the cubic phase of range frequency. Although some block processing methods have addressed the range-dependent variant cubic phase of range frequency, they lack detailed impact analyses and segmentation criteria. This paper first proposes a Circle–Sphere geometric model to establish a theoretical framework for analyzing range-dependent variance impacts. Through simulation experiments, we validate the theoretical model’s accuracy and develop a numerical analysis of range-dependent variance effects. Building upon this foundation, we introduce a range-dependent variance correction method based on block processing in the range dimension. This method, incorporating valid data area and buffered data area, effectively corrects range-dependent variance while preventing data wrapping and fragmentation. Moreover, our theoretical model for analyzing range-dependent variance impacts provides both theoretical and numerical foundations for block segmentation criteria. The effectiveness and applicability of the proposed method are validated through both simulation experiments and real data experiments using GF3. |
| format | Article |
| id | doaj-art-0d18fc61ac004d1a8254df7e65e70d72 |
| institution | Kabale University |
| issn | 2072-4292 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj-art-0d18fc61ac004d1a8254df7e65e70d722025-01-10T13:20:04ZengMDPI AGRemote Sensing2072-42922024-12-011715010.3390/rs17010050Range-Dependent Variance Correction Method for High-Resolution and Wide-Swath Spaceborne Synthetic Aperture Radar Imaging Based on Block Processing in Range DimensionZhenyu Hou0Zehua Zhang1Pin Li2Zhuo Yun3Feng He4Zhen Dong5College of Electronic Science and Technology, National University of Defense Technology, Deya Road No. 109, Changsha 410073, ChinaCollege of Electronic Science and Technology, National University of Defense Technology, Deya Road No. 109, Changsha 410073, ChinaCollege of Electronic Science and Technology, National University of Defense Technology, Deya Road No. 109, Changsha 410073, ChinaCollege of Electronic Science and Technology, National University of Defense Technology, Deya Road No. 109, Changsha 410073, ChinaCollege of Electronic Science and Technology, National University of Defense Technology, Deya Road No. 109, Changsha 410073, ChinaCollege of Electronic Science and Technology, National University of Defense Technology, Deya Road No. 109, Changsha 410073, ChinaWith increasing demands for SAR image applications, spaceborne SAR systems are evolving towards higher resolution and wider swath capabilities. However, these advancements lead to more pronounced range-dependent variance effects. Previous research has primarily focused on the impact of range-dependent variance on range cell migration and the quadratic phase of range frequency, while often neglecting the effects of the cubic phase of range frequency. Although some block processing methods have addressed the range-dependent variant cubic phase of range frequency, they lack detailed impact analyses and segmentation criteria. This paper first proposes a Circle–Sphere geometric model to establish a theoretical framework for analyzing range-dependent variance impacts. Through simulation experiments, we validate the theoretical model’s accuracy and develop a numerical analysis of range-dependent variance effects. Building upon this foundation, we introduce a range-dependent variance correction method based on block processing in the range dimension. This method, incorporating valid data area and buffered data area, effectively corrects range-dependent variance while preventing data wrapping and fragmentation. Moreover, our theoretical model for analyzing range-dependent variance impacts provides both theoretical and numerical foundations for block segmentation criteria. The effectiveness and applicability of the proposed method are validated through both simulation experiments and real data experiments using GF3.https://www.mdpi.com/2072-4292/17/1/50synthetic aperture radar (SAR) imaginghigh resolutionwide swathspaceborne SARrange-dependent varianceblock processing |
| spellingShingle | Zhenyu Hou Zehua Zhang Pin Li Zhuo Yun Feng He Zhen Dong Range-Dependent Variance Correction Method for High-Resolution and Wide-Swath Spaceborne Synthetic Aperture Radar Imaging Based on Block Processing in Range Dimension Remote Sensing synthetic aperture radar (SAR) imaging high resolution wide swath spaceborne SAR range-dependent variance block processing |
| title | Range-Dependent Variance Correction Method for High-Resolution and Wide-Swath Spaceborne Synthetic Aperture Radar Imaging Based on Block Processing in Range Dimension |
| title_full | Range-Dependent Variance Correction Method for High-Resolution and Wide-Swath Spaceborne Synthetic Aperture Radar Imaging Based on Block Processing in Range Dimension |
| title_fullStr | Range-Dependent Variance Correction Method for High-Resolution and Wide-Swath Spaceborne Synthetic Aperture Radar Imaging Based on Block Processing in Range Dimension |
| title_full_unstemmed | Range-Dependent Variance Correction Method for High-Resolution and Wide-Swath Spaceborne Synthetic Aperture Radar Imaging Based on Block Processing in Range Dimension |
| title_short | Range-Dependent Variance Correction Method for High-Resolution and Wide-Swath Spaceborne Synthetic Aperture Radar Imaging Based on Block Processing in Range Dimension |
| title_sort | range dependent variance correction method for high resolution and wide swath spaceborne synthetic aperture radar imaging based on block processing in range dimension |
| topic | synthetic aperture radar (SAR) imaging high resolution wide swath spaceborne SAR range-dependent variance block processing |
| url | https://www.mdpi.com/2072-4292/17/1/50 |
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