| 新体制SAR三维成像技术研究进展 |
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| 引用本文： | 洪文,王彦平,林赟,谭维贤,吴一戎.新体制SAR三维成像技术研究进展[J].雷达学报,2018,7(6):633-654. |
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| 作者姓名： | 洪文 王彦平 林赟 谭维贤 吴一戎 |
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| 基金项目： | 国家自然科学基金(61431018, 61860206013, 61571421) |
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| 摘 要： | 常规SAR成像，平台沿直线飞行，形成直线型合成孔径，仅能获取2维图像，即3维空间中的观测场景在斜距-方位平面的2维投影，图像具有叠掩、透视缩短、阴影等畸变现象。SAR 3维成像突破了斜距-方位2维频率信息获取，能够获取第3维频率信息，实现3维分辨，可获得观测场景的散射中心在3维空间中的分布，从而解决叠掩问题，消除透视缩短、顶底倒置等几何形变现象，更直观地描述客观场景，已成为国际研究热点。该文介绍SAR 3维成像的概念和主要观测模式，分析该领域国内外研究现状和进展，重点阐述作者所在研究团队的SAR 3维成像研究进展，最后对SAR 3维成像技术进行总结和展望。
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| 关 键 词： | SAR 3维成像 多基线层析SAR 阵列3维SAR 曲线轨迹SAR 圆迹SAR 多基线圆迹SAR |
| 收稿时间： | 2018-12-05 |
Research Progress on Three-dimensional SAR Imaging Techniques |
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| Hong Wen,Wang Yanping,Lin Yun,Tan Weixian,Wu Yirong.Research Progress on Three-dimensional SAR Imaging Techniques[J].Journal of Radars,2018,7(6):633-654. |
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| Authors: | Hong Wen Wang Yanping Lin Yun Tan Weixian Wu Yirong |
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| Affiliation: | Science and Technology on Microwave Imaging Laboratory, Beijing 100190, ChinaKey Laboratory of Technology in Geo-Spatial Information Processing and Application System, Beijing 100190, ChinaInstitute of Electronics, Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | Conventional Synthetic Aperture Radar (SAR) moves along a straight line and forms a linear synthetic apertures. It can only obtain the two-dimensional (2-D) image of illuminated scene that is the projection of the three-dimensional (3-D) real scene onto a slant plane. The slant plane 2-D SAR image, however, suffers from layover and foreshortening effects. 3-D SAR imaging enables 3-D resolving capability by extending the acquisition of frequency information from 2-D to 3-D. It can obtain the 3-D distribution of scattering centers; therefore, it solves the geometric deformation problems of layover and foreshortening. 3-D SAR imaging has become a trending topic in research on SAR techniques worldwide. In this paper, we first introduced the concept of 3-D SAR imaging and several typical 3-D SAR imaging modes. Furthermore, it provides a discussion on research progress at home and abroad, particularly focusing on the progress of our research team. Finally, future research prospects are presented. |
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