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星载合成孔径雷达(SAR)飞行高度高,速度快、探测距离远、测绘带宽,运行轨道偏离理想圆形,因此获取SAR图象的数字信号处理技术十分复杂。本文从上述特点出发,讨论了星载SAR的目标回波信号数学模型,成象过程中方位处理的机理和方法,以及多视处理。
Space-borne Synthetic Aperture Radar (SAR) has high flight altitude, high speed, long detection range, widening of the survey bandwidth and deviation of ideal orbit from the orbit, so the digital signal processing technology for obtaining SAR image is very complicated. Based on the above characteristics, this paper discusses the mathematical model of target echo signals in spaceborne SAR, the mechanism and method of azimuth processing in imaging, and multi-view processing.