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本文对星载SAR辐射定标的各项误差因素进行了分析,提出了计算辐射定标误差的公式,提供了分配星载SAR系统辐射定标误差的工具;对基于CS(Chirp Scaling)算法的成像处理器的增益计算公式进行了推导,并通过计算机仿真得到了验证;定量地分析了成像处理器增益计算误差对SAR系统辐射定标精度的影响。
In this paper, the error factors of radiation calibration of spaceborne SAR are analyzed, the formula of calculating radiation calibration error is proposed, and the tool to allocate the radiation calibration error of spaceborne SAR system is provided. Based on CS (Chirp Scaling) algorithm The gain calculation formula of the imaging processor is deduced and verified by computer simulation. The influence of imaging processor gain calculation error on the radiation calibration accuracy of SAR system is quantitatively analyzed.