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为了有效探测地基合成孔径雷达(GB-SAR)干涉测量中的永久散射体(PS),该文利用GB-SAR影像具有高相干性特点,基于以往雷达影像PS点选取理论提出一种平均相干系数阈值与振幅离差指数阈值的“双阈值法”自动探测法,并对阈值参数进行优化,以挑选出GB-SAR影像中精确可靠的PS点。经过实验验证,证实了该方法是有效可靠的,并得到大量数据,比少量数据选取PS点更有效、可靠。
In order to effectively detect permanent scatterers (PS) in GB-SAR interferometry, this paper uses the coherence of GB-SAR images and proposes an average coherence coefficient based on the PS point selection theory of previous radar images Threshold and Amplitude Deviation Exponential threshold “double threshold method ” automatic detection method, and the threshold parameters are optimized to select the accurate and reliable PS point in the GB-SAR image. After experimental verification, the method is proved to be effective and reliable, and a large amount of data is obtained, which is more effective and reliable than selecting PS points with a small amount of data.