In slant range resolution improvement by multiple Synthetic Aperture Radar (SAR) survey, the choice of length of baseline is very important. Based on the theory of wavenumber shift, the effect of baseline is analyzed to the image quality and proved by simulation, comparing the resolution, PSLR, ISLR indexes. Besides, a criterion is put forward on the choice of baseline in slant range resolution improvement by multiple SAR survey, which is much useful in the implementation%在多视角观测提高合成孔径雷达(SAR)距离分辨率中,基线长度的选择至关重要.在深入分析频谱偏移原理的基础上,研究基线长度对成像结果的影响原理.通过仿真分辨率、PSLR、ISLR指标随基线长度变化的规律验证了分析结果,并得出多视角观测提高SAR距离分辨率中基线长度的选取原则.对实际工程实现具有一定的指导意义.
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