Research Progress on Three-dimensional SAR Imaging Techniques
Hong Wen,
Wang Yanping,
Lin Yun,
Tan Weixian,
Wu Yirong
Affiliations
Hong Wen
(Science and Technology on Microwave Imaging Laboratory, Beijing 100190, China) (Key Laboratory of Technology in Geo-Spatial Information Processing and Application System, Beijing 100190, China) (Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)
Wang Yanping
(Science and Technology on Microwave Imaging Laboratory, Beijing 100190, China) (Key Laboratory of Technology in Geo-Spatial Information Processing and Application System, Beijing 100190, China) (Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)
Lin Yun
(Science and Technology on Microwave Imaging Laboratory, Beijing 100190, China) (Key Laboratory of Technology in Geo-Spatial Information Processing and Application System, Beijing 100190, China) (Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)
Tan Weixian
(Science and Technology on Microwave Imaging Laboratory, Beijing 100190, China) (Key Laboratory of Technology in Geo-Spatial Information Processing and Application System, Beijing 100190, China) (Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)
Wu Yirong
(Science and Technology on Microwave Imaging Laboratory, Beijing 100190, China) (Key Laboratory of Technology in Geo-Spatial Information Processing and Application System, Beijing 100190, China) (Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)
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.
