Journal of Systems Engineering and Electronics ›› 2020, Vol. 31 ›› Issue (4): 722-733.doi: 10.23919/JSEE.2020.000047

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An approach to wide-field imaging of linear rail ground-based SAR in high squint multi-angle mode

Yuan ZHANG1(), Qiming ZHANG1(), Yanping WANG1,*(), Yun LIN1(), Yang LI1(), Zechao BAI1(), Fang LI2()   

  1. 1 School of Information Science and Technology, North China University of Technology, Beijing 100144, China
    2 Quanzhou Institute of Equipment Manufacturing, Haixi Institutes, Chinese Academy of Sciences, Jinjiang 362200, China
  • Received:2019-09-05 Online:2020-08-25 Published:2020-08-25
  • Contact: Yanping WANG E-mail:zhangyuan@ncut.edu.cn;zhangqimingncut@outlook.com;wangyp@ncut.edu.cn;ylin@ncut.edu.cn;haffner@126.com;baizechao1991@163.com;fangli@fjirsm.ac.cn
  • About author:ZHANG Yuan was born in 1983. He received his Ph.D. degree from Beihang University in 2017. He was invited by Prof. Xiaoxiang Zhu and Prof. Richard Bamler to conduct Ph.D. joint cultivation at the German Aerospace Center and the Technical University of Munich in 2015 to 2016. Currently, he is an associate professor with the North China University of Technology. E-mail: zhangyuan@ncut.edu.cn|ZHANG Qiming was born in 1997. He received his B.S. degree in electronic information engineering from Jilin University in 2018. Now he is a postgraduate student of the School of Information Science and Technology, North China University of Technology, Beijing, China. His research interest is synthetic aperture radar imaging. E-mail: zhangqimingncut@outlook.com|WANG Yanping was born in 1976. He received hisPh.D. degree from the Institute of Electronics, Chinese Academy ofSciences, Beijing, China, in 2003, where he has been the deputydirector of the National Key Laboratory of Microwave ImagingTechnology. Now he is a professor with the School of InformationScience and Technology, North China University of Technology, Beijing, China. He is a member of the IEEE and the IETInternational Radar Conference Procedure Committee. His researchinterests include intelligent radar, radar deformation monitoring, and intelligentearly warning technology.E-mail: wangyp@ncut.edu.cn|LIN Yun was born in 1983. She received her Ph.D. degree from the Institute of Electronics, Chinese Academy of Sciences in 2011. From 2012 to 2018, she was with the Institute of Electronics, Chinese Academy of Sciences, as a scientist. Now, she is an associate professor with the School of Electronic Information Engineering, North China University of Technology, Beijing, China. Her current interests are circular SAR imaging and anisotropic scattering target detection. E-mail: ylin@ncut.edu.cn|LI Yang was born in 1983. He received his Ph.D. degree from the Institute of Electronics, Chinese Academy of Sciences. He is an associate professor with the School of Information Science and Technology, North China University of Technology, Beijing, China. His research interests include intelligent radar, radar deformation monitoring, and intelligent early warning technology. E-mail: haffner@126.com|BAI Zechao was born in 1991. He is currently pursuing his Ph.D. degree at North China University of Technology, Beijing. His research interests are the spaceborne/ground interferometric synthetic aperture radar (InSAR) algorithm and its application in geological disaster InSAR data processing. E-mail: baizechao1991@163.com|LI Fang was born in 1986. He received his Ph.D. degree in photogrammetry and remote sensing from the Technical University of Munich. He is an associate research fellow with the Quanzhou Institute of Equipment Manufacturing, Haixi Institutes, Chinese Academy of Sciences, Quanzhou, China. His main research interests include image processing and analysis, pattern recognition, and related remote sensing/environmental and industrial applications. E-mail: fangli@fjirsm.ac.cn
  • Supported by:
    the National Natural Science Foundation of China(61801007);the Beijing Natural Science Foundation(4194075);This work was supported by the National Natural Science Foundation of China (61801007) and the Beijing Natural Science Foundation (4194075)

Abstract:

Ground-based synthetic aperture radar (GB-SAR) has been successfully applied to the ground deformation monitoring. However, due to the short length of the GB-SAR platform, the scope of observation is largely limited. The practical applications drive us to make improvements on the conventional linear rail GB-SAR system in order to achieve larger field imaging. First, a turntable is utilized to support the rotational movement of the radar. Next, a series of high-squint scanning is performed with multiple squint angles. Further, the high squint modulation phase of the echo data is eliminated. Then, a new multi-angle imaging method is performed in the wave number domain to expand the field of view. Simulation and real experiments verify the effectiveness of this method.

Key words: ground-based synthetic aperture radar (GB-SAR), high squint, multi-angle