一种估计水体的InSAR相位算法  

An algorithm of estimating InSAR phase for water

作　　者：朱煜峰[1] 王升 ZHU Yufeng;WANG Sheng(Faculty of Geomatics,East China University of Technology,Nanchang 330000,China)

机构地区：[1]东华理工大学测绘工程学院,南昌330000

出　　处：《测绘科学》2020年第9期96-103,131,共9页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41464001);江西省自然科学基金项目(20151BAB203042)。

摘　　要：针对干涉合成孔径雷达的干涉相位在水体区域几乎完全失真,不能够反映真实的干涉相位,并且会降低水体周围区域反演的DEM的精度的问题,该文提出一种估计水体干涉相位算法,使用该算法处理两幅不同区域的Sentinel-1A卫星影像的C波段SAR干涉相位数据,并使用处理后的相位干涉数据反演成DEM,定量分析两次实验反演的水体周围区域的DEM精度,反映DEM精度的指标都大于0。表明经过该算法处理之后,提高了InSAR反演DEM的精度,从而间接验证了本文提出算法的有效性。Aiming at the problem that the InSAR interferometric phase in water area was almost completely distorted,unable to reflect the real interferometric phase and reduce the accuracy of DEM inversion in the area around water body,an algorithm of estimating interference phase for water was proposed in the paper.The algorithm was used to process the C-band SAR interferometric phase data of Sentinel-1 A satellite images from two different regions,and the processed phase interferometric data were used to invert DEM.Finally,the accuracy of DEM which was around water body and inversion from two experiments was quantitatively analyzed,the indexes reflecting the accuracy of DEM were all greater than 0.The result indicated that after the processing of the algorithm,the accuracy of the DEM which was inversion from InSAR was improved,thus the effectiveness of the algorithm proposed in this paper was indirectly verified.

关 键 词：水体 干涉相位 相干性 相位估计算法 DEM精度 

分 类 号：P234[天文地球—摄影测量与遥感]