合成孔径雷达（SAR）是一种高分辨成像雷达。当今雷达成像技术已经非常成熟，在国民经济与军事领域中有着广泛的应用。但在SAR成像过程中如何对动目标成像并定位依然是一个值得探讨的课题。该文提出通过求取动目标调频斜率的方法能对动目标更清晰地成像，然后通过多普勒频谱搬移法得到动目标在雷达图像上的定位，使成像质量较高的动目标图像叠加到静止地物雷达图像上。最后通过雷达实测数据进行处理，得到较为满意的结果。

SAR is a kind of radar used for high-resolution imaging,and the imaging technique is very mature now and is widely used in civil and military fields,but it's a challenging task to obtain the image for moving targets clearly. A method is suggested in this paper to get clearer image for moving targets by using frequency modulation rate of them and to relocate the moving targets in radar image by moving the Doppler spectrum. At last, some satisfying results obtained from the raw radar data are presented.

TN957.52