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当物体在水中运动时，它所引起的流场变化会调制海水表面的小尺度波动，从而可以被合成孔径雷达（ＳＡＲ）所探测。本文建立了一个三维半隐式格式，对水下运动物体的绕流问题进行了数值计算。在袁业立有关海波高谱形式及ＳＡＲ影像原理的理论分析基础上，本文进一步计算了水下运动物体ＳＡＲ影像的Ｇ值分布图，并讨论了物体深度、海水水深、海表面主波方向对水下运动物体ＳＡＲ影像的影响。
When an object moves in water, the changes in the flow field it causes can modulate the small-scale fluctuations in the surface of the sea that can be detected by Synthetic Aperture Radar (SAR). In this paper, we establish a three-dimensional semi-implicit scheme to calculate the flow around the underwater objects. Based on the theoretical analysis of the high-frequency spectral form of Hayward and the principle of SAR image, this paper further calculates the G-value distribution of underwater moving object SAR images and discusses the effects of object depth, seawater depth, Effects of SAR Images on Moving Objects.