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Volume 32 Issue 04
Apr.  2006
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Journal of Beijing University of Aeronautics and Astronautics  > 2006  >  32(04): 435-439.
Guo Xujing, Wang Zulin. Nonsubsampled Contourlet speckle reduction algorithm for SAR images[J]. Journal of Beijing University of Aeronautics and Astronautics, 2007, 33(08): 894-897. (in Chinese)
Citation: Sun Bing, Zhou Yinqing, Chen Jie, et al. SAR imaging formation and geometric correction method based on diving model[J]. Journal of Beijing University of Aeronautics and Astronautics, 2006, 32(04): 435-439. (in Chinese)
shu

SAR imaging formation and geometric correction method based on diving model

  • School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

  • Received Date: 20 Apr 2005
  • Publish Date: 30 Apr 2006
    Abstract
  • The squint SAR(synthetic aperture radar) high resolution imaging formation and geometric correction method based on the diving model were studied. The general three-dimensional geometric model was founded based on the SAR movement mode. The equivalent squint range model was derived from this general geometric model and the echo signal expression was given based on this range model. According to the signal's characteristic, burst work mode was adopted in diving SAR, and a modified ECS(extended chirp scaling) imaging algorithm was utilized to form high resolution image. The imaging formation flow chart and four ECS phase compensation factors were presented. According to the range equation and Doppler positioning equation, geometric correction calculating expressions corresponding to ECS algorithm were derived. The computer simulation results illuminated that the modified ECS algorithm could be used to form high resolution image for diving model SAR and squint SAR, also geometric distortion could be calibrated with this correction method.

     

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  • [1] 孙 兵,周荫清,陈 杰,等．高速俯冲SAR成像方法研究[J]．电子与信息学报,2004,26(9):173~180 Sun Bing, Zhou Yinqing, Chen Jie, et al. Imaging method of missile-borne SAR with high diving speed[J]. Journal of Electronic & Information Technology, 2004, 26(9):173~180(in Chinese) [2] Alberto M,Josef M, Rolf S．Extended chirp scaling algorithm for air and spaceborne SAR data procssing in stripmap and ScanSAR imaging modes[J]．IEEE Transactions on Geoscience and Remote Sensing,1996, 34(5):1123~1136 [3] 黄 岩,李春升,陈 杰,等．高分辨率星载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 Electronic Sinica, 2000, 28 (3):35~38(in Chinese) [4] 魏钟铨．合成孔径雷达卫星[M]．北京:科学出版社,2001.160 Wei Zhongquan. Synthetic aperture radar satellite[M]. Beijing:Science Press, 2001.160(in Chinese) [5] 文 竹,周荫清,陈 杰．基于ECS+FIR的星载SAR快视成像算法[J]．电子学报,2004, 32(6):933~937 Wen Zhu, Zhou Yinqing, Chen Jie. A new quick-look algorithm for spaceborne synthetic aperture radar based on ECS + FIR[J]. Acta Electronic Sinica, 2000,32(6):933~937(in chinese) [6] 魏 杰,周荫清,李春升．星载ScanSAR辐射校正和图像拼接[J]．电子与信息学报,2004,26(9):481~486 Wei Jie, Zhou Yinqing, Li Chunsheng. Radiometric correction and mosaic of subimages of spaceborne ScanSAR[J]. Journal of Electronic & Information Technology, 2004, 26(9):481~486(in Chinese) [7] John C C．Synthetic aperture radar systems and signal processing ．New York:John Wiley & Sons Inc, 1991.374~376
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