基于RD算法的星载SAR斜视成像

本文研究了用距离一多普勒（ＲＤ）算法来实现星载 ＳＡＲ的斜视成像处理。给出了星载 ＳＡＲ斜视时的空间几何模型和回波信号模型，详细分析了地球自转和斜视产生的多普勒质心所引起的距离走动差异，及时域和频域校正对成像的影响，并研究了一种改进的ＲＤ算法进行距离走动的校正，此算法能适应大的斜视距离走动和地球自转距离走动。针对不同的距离走动校正进行了计算机仿真，理论分析和仿真结果表明：这种改进的ＲＤ算法是有效的。

The Squint Imaging of Spaceborne SAR in RD Algorithm

This paper studies range-Doppler(RD) algorithm for the imaging of squint spaceborne SAR. The model of squint mode spaceborne SAR spactial geometry and echo response is given, The difference between range walk producing by the earth rotation and squint mode, and effect of the correction of these two range walk on time and frequency are analyzed carefully. The modified RD algorithm is studied for the correction of these two range walk, The algorithm is suitable for these two large range walk. The result of theory analysis and simulation show that the algorithm is effectively.