中文摘要：

提出了一种变波速条件下前视探地雷达三维合成孔径成像及多视处理方法。该方法利用非平稳卷积滤波处理在频率域重构目标图像频谱，经傅里叶反变换后实现前视探地雷达三维合成孔径成像：利用估计的目标入射角实现折射校正及前视探地雷达多视处理。对实测数据进行处理，结果证明了该方法的有效性。

英文摘要：

This paper presents a 3D SAR imaging and multi-look processing algorithm in the variation of the velocity for the forward-looking ground penetrating radar （FLGPR）. By using nonstationary convolution filter, the spectrum of the refocused image can be reconstructed directly from the spectrum of backscattered signal from the target area and the 3D target image is reconstructed after the inverse Fourier transform. By estimating the incidence angle of target, the refraction correction and the multi-look processing are accomplished. The effectiveness of the approach is demonstrated with experimental data set.