Volume 29 Issue 6
Jun.  2003
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Wang Guodong, Zhou Yinqing, Li Chunshenget al. Analysis of Spaceborne Spotlight SAR Antenna Beam Point Steering[J]. Journal of Beijing University of Aeronautics and Astronautics, 2003, 29(6): 484-488. (in Chinese)
Citation: Wang Guodong, Zhou Yinqing, Li Chunshenget al. Analysis of Spaceborne Spotlight SAR Antenna Beam Point Steering[J]. Journal of Beijing University of Aeronautics and Astronautics, 2003, 29(6): 484-488. (in Chinese)

Analysis of Spaceborne Spotlight SAR Antenna Beam Point Steering

  • Received Date: 19 Aug 2002
  • Publish Date: 30 Jun 2003
  • In the condition of beam point steering, spaceborne spotlight SAR antenna model and imaging model were found. The math analysis confirmed that beam point steering resulted in echo amplitude being modulated and caused infinite pairs of echoes. So beam point steering would deteriorate image quality. Besides, based on the analyses of tradeoff relation of beam point steering ratio, imaging area azimuth width and image dynamic extent, the fundamental principle of designing beam point steering ratio was presented. Finally, point target simulation was given and simulation result shows the validity of theoretical analysis.

     

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  • [1] Carrara W G, Goodman R S, Majewski R M. Spotlight synthetic aperture radar[M]. Artech House Boston, 1995 [2] 张澄波. 综合孔径雷达:原理、系统分析与应用[M].北京:科学出版社, 1989 Zhang Chengbo. Syntheticaperture radar:theory, system analysis and application[M]. Beijing:Science Publishing House, 1989(in Chinese) [3] 黄 岩, 李春升, 陈 杰, 等. 星载SAR天线指向稳定度对成像质量的影响[J]. 北京亚洲成人在线一二三四五六区学报, 2000, 26(3):282~285 Huang Yan, Li Chunsheng, Chen Jie, et al. Effects of stability of antenna pointing on spaceborne SAR imaging quality[J]. Journal of Beijing University of Aeronautics and Astronautics, 2000,26(3):282~285(in Chinese) [4] 黄 岩, 李春升, 陈 杰, 等. 高分辨星载SAR改进Chirp Scaling成像算法[J]. 电子学报, 2000, 28(3):35~38 Huang Yan, Li Chunsheng, Chen Jie, et al. Refined chirp scaling algorithm for high resolution spaceborne SAR imaging[J]. Acta Electronica Sinica, 2000, 28(3):35~38(in Chinese)
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