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中文摘要：
顺轨干涉合成孔径雷达技术（ATI-SAR）是一种适用于运动目标检测（GMTI）的干涉合成孔径雷达（SAR）技术。基线误差是顺轨干涉雷达系统的主要误差,直接影响地面运动目标测速的准确性以及定位精度。本文基于对ATI基线误差源特性的分析,针对2个主要基线误差源——姿态误差和相位中心误差进行定标方法的探讨和研究。通过仿真实验可以看出,文中提供的定标方法对误差的处理准确、有效,因此这些定标方法为进一步研究并制定机载ATI-SAR定标方案奠定了基础。
英文摘要：
The technique of along-track interferometric synthetic aperture radar （ATI-SAR） can be applied to ground moving targets indication （GMTI）.The time baseline error is an influential error of along-track interferometric SAR system and can directly affect velocity measurement and localization precision.In this paper,two main error resources of time baseline- namely biases of attitudes and phase center offsets- are studied and discussed according to the mathematical characteristic of the error resources of ATI time baseline.From the results of the simulation experiments,it is concluded that all the calibration techniques proposed in this paper are precise and effective,which is the basis of future research work such as studying the calibration scheme.
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