斜式模式距离-多普勒-距离星载合成孔径雷达成像算法

距离一多普勒一距离(R-D-R)成像算法是根据雷达回波信号的傅里叶谱的相位特性进行相位补偿和聚焦的，且运算量不大。本文对该算法进行了修正，使该算法适用于斜视模式的机载和星载SAR成像。在数学推导的基础上，给出了算法流程和该算法的点目标成像仿真结果，并把该算法应用于星载SAR成像，给出了它的Radarsat-l原始数据的成像结果，验证了该修正算法可应用于机载和星载SAR成像处理。

A Modified Range-Doppler-Range Imaging Algorithm in Squint Mode for Space-borne SAR

In a range-Doppler-range(R-D-R) imaging algorithm,the phase compensation and focusing are made based on the phase characteristic of Fourier spectrum of radar echoed signal.Compared with other algorithms,the computational load of the method is much reduced.The R-D-R algorithm was here modified significantly to make it apply to airborne and space-borne SAR imaging in squint mode.The modified algorithm was deduced mathematically.The flow chart of the approach and the simulated result of a point target imaging were also given.Meanwhile,the approach was applied to space-borne SAR imaging and the outcoming image for Radarsat-1 raw data was given.The results indicate that the approach can be applied to airborne SAR and space-borne SAR image processing.