摘要
研究InSAR形变数据的四叉数压缩、Kriging插值和低通滤波处理方法。以西安地区1996年两期SAR监测获取的地面沉降为例进行的实例分析结果证实:该方法能有效抑制形变粗差,并有利于特征点的提取和等值线的绘制。
The deformation data from the InSAR processing are always massive and always include some errors due to decorrelation, which cannot be detected from image expressing. However, compared with the conventional surveying data or inversion analysis, it should be better eliminated and greatly compressed when discrete feature points are extracted or with a contour line from InSAR. On the basis of the quadtree compressing, Kriging interpolation and Low-pass filter, a flowchart of the contour mapping is proposed for the InSAR deformation data. Finally the method is evaluated through a case study of the two-period ground subsidence around Xi＇ an City in 1996.
出处
《大地测量与地球动力学》
CSCD
北大核心
2009年第5期143-146,151,共5页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(40802075
40672173)
关键词
INSAR
四叉树分解
克里金插值
等值线
滤波
SAR interferometry
quadtree decomposition
Kriging interpolation
contour
filtering
