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机载超宽带SAR运动误差建模与分析 被引量:1

Modeling and Analysis of Motion Errors of Airborne Ultra-wide Band SAR
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摘要 机载超宽带合成孔径雷达(UWB SAR)具有大积累角和长合成孔径的特点,这使得这类SAR系统的运动误差变得非常复杂。建立了机载UWB SAR运动误差模型,并基于该模型推导了存在运动误差情况下的回波信号频谱。分析了运动误差影响SAR成像处理的根本原因,以及不同特性运动误差对SAR图像所产生的不同影响。仿真实验结果证明了文中理论分析的正确性。 Airborne Ultra-Wide Band Synthetic Aperture Radar (UWB SAR) has larger integrated angle and longer synthetic aperture,which gives rise to more complexity in motion errors.In light of this,first the motion model of airborne UWB SAR was derived.Then,the expression of echo spectrum in presence of motion error was deducted.Theoretic analysis on the reason of the motion error impacts on SAR imaging and the influences on SAR images induced by the different motion errors were carried out.Experiment results on simulated data proved the validity of the theory analysis presented in this paper.
出处 《国防科技大学学报》 EI CAS CSCD 北大核心 2011年第1期65-71,共7页 Journal of National University of Defense Technology
基金 国家自然科学基金资助项目(60972121) 教育部新世纪人才支持计划项目(NCET-07-0223) 国防科技大学优秀研究生创新资助项目(B090404)
关键词 超宽带 合成孔径雷达 运动误差 ultra-wide band synthetic aperture radar motion error
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参考文献5

  • 1Fornaro G. Trajectory Deviations in Airborne SAR: Analysis and Compensation [J]. IEEE Transactions on Aerospace and Electronic Systems, 1999, 35(3): 997- 1009.
  • 2Cumming I G, Wong F H. Digital Processing of Synthetic Aperture Radar Data: Algorithms and Implementation [M]. Norwood, MA: Artech House, 2005.
  • 3Moreira A, Huang Y H. Airborne SAP, Processing of Highly Squinted Data Using a Chirp Scaling Approach with Integrated Motion Compensation [ J ]. IEEE Transactions on Geoscience and Remote Sensing, 1994, 32(5) : 1029 - 1040.
  • 4Xing M D, Jiang X W, Wu R B, et al. Motion Compensation for UAV SAR Based on Raw Radar Data [J]. IEEE Transaction on Geoscience and Remote Sensing, 2009, 47(8): 2870-2882.
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