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本文对相干扩展目标散射的近场效应进行了研究，通过计算理想情况下由路径相关产生的干涉效应，验证并澄清了扩展目标在不同入射情况下散射干涉的物理机制，并在此基础上引入了浅粗糙面散射的概念．这为准确定标遥感仪器，实现陆基遥感测量的定量化奠定了理论基础．
In this paper, we study the near-field effect of coherent expansion target scattering. By calculating the interference effect caused by the path correlation under ideal conditions, we verify and clarify the physical mechanism of scattering interference of extended target under different incident conditions. Based on this, The concept of shallow rough surface scattering. This laid the theoretical foundation for the accurate calibration of remote sensing instruments and the quantitative determination of land-based remote sensing.