摘要
大气效应是InSAR技术用于地表探测的主要误差源之一。GPS数据作为InSAR大气延迟误差改正的重要数据源,受其站点分布疏密的影响,分辨率还无法做到与SAR影像完全相匹配,必须对GPS获取的大气延迟数据进行空间插值。本文采用反距离加权法(IDW)、Kriging插值法和移动曲面拟合法(Surface Moving Fitting,SMF)三种插值方法,探讨了InSAR大气误差改正过程中的空间插值问题,并对三种插值的精度进行了分析和评价。
The atmospheric effect is one of the main error sources of InSAR technology for surface detection.GPS data,as an important data source for InSAR atmospheric delay error correction,whose resolution is not exactly compatible with SAR images owing to the influence of distribution and density of GPS sites,and the atmospheric delay obtained by the GPS must be encrypted and interpolated.In this paper,spatial interpolation problems about InSAR in the process of the atmospheric correction were discussed based on the inverse distance weighting（IDW）,Kriging interpolation method and Surface Moving Fitting（SMF）,and the accuracy of three kinds of interpolation method were analyzed and evaluated.
作者
黄长军
陈元洪
周吕
HUANG Changjun;CHEN Yuanhong;ZHOU Lü(School of Municipal and Surveying Engineering,Hunan City University,Yiyang Hunan 413000,China;Wuhan Surveying and Designing Company Limited,Wuhan Hubei 430022,China;School of Geodesy and Geomatics,Wuhan University Wuhan Hubei 430079,China)
出处
《北京测绘》
2018年第6期629-632,共4页
Beijing Surveying and Mapping
基金
湖南省教育厅科研基金资助项目(12C0566)
湖南省科技计划项目(2016JJ6018)
关键词
全球定位系统(GPS)
合成孔径雷达干涉测量
大气误差改正
空间插值
对流层延迟
Global position system （GPS）
Interferometric Synthetic Aperture Radar （InSAR）
atmospheric correction
spatial interpolation
tropospheric delay
