PSI技术在地表形变监测中的应用研究Application of PSI technique in deformation monitoring
聂运菊,刘国祥,石金峰,于冰,程朋根
摘要(Abstract)：
基于时序SAR影像准确识别PS是永久散射体合成孔径雷达干涉(PSI)技术建模及形变信息提取中最为关键的问题之一。本文提出了一种改进的PS探测算法,它是基于时序SAR影像的振幅信息,利用振幅和振幅离差指数双阈值法获取PS候选点,对所有候选点进行相位稳定性分析,筛选出既满足雷达反射强度高、又符合散射稳定性要求的真实PS点,并基于所选PS点提取形变信息。实验结果表明,相比于已有PS探测方法,本文所提出的方法能够更准确、可靠地识别出时序SAR影像中的PS目标,进而提高了PSI形变探测结果的精度和可靠性。
关键词(KeyWords)： 永久散射体探测;振幅;振幅离差指数;相位稳定性;形变
基金项目(Foundation): 国家自然科学基金项目(41074005)
作者(Author): 聂运菊,刘国祥,石金峰,于冰,程朋根
DOI: 10.16251/j.cnki.1009-2307.2013.02.041
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