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分析了合成孔径雷达(SAR)平台沿航向运动误差对回波信号时域及频域特性的影响.建立了带有沿航向运动误差的时域回波信号模型,得到了回波时域误差的计算公式;利用级数反转原理,推导了回波频域误差的表达式,为SAR系统分析及成像算法设计提供了理论依据.理论分析和计算机仿真表明,回波频域特征对沿航向运动误差更为敏感.
The influence of the motion error of SAR on the time domain and frequency domain of the echo signal is analyzed.The time domain echo signal model with motion error along the heading is established and the time domain error of the echo is obtained The formula of the error of the frequency domain is deduced by using the principle of series inversion, which provides a theoretical basis for SAR system analysis and imaging algorithm design.Theoretical analysis and computer simulation show that the characteristics of the echo in the frequency domain are of great importance for the along-heading motion Errors are more sensitive.