摘要
大气水汽是影响重复轨道合成孔径雷达干涉测量形变监测的一个主要误差源。本文选取官厅水库附近地区为研究区域,利用重复轨道ENVISAT卫星ASAR数据的差分干涉处理结果和近地表卫星水汽数据以及卫星过境当日气温资料,对重轨D-INSAR大气水汽的影响进行了初步分析。研究结果表明:大气水汽相对湿度变化21.6%时,差分干涉处理中大气水汽产生的"伪形变"——大气水汽影响的绝对量值,在水平方向为12.2 cm,在高程方向为5.29 cm。
Atmospheric water vapor is a main one of errors effects on repeat-pass Differential Interferometric Synthetic Aperture Radar monitoring deformation.This paper select an area near GuanTing Reservoir as study area,obtains horizontal changes map and height changes map of study area by using ENVISAT-1 ASAR data set.At the same time,deduces in reverse the atmospheric water vapor relative humidity by using satellite atmospheric water vapor dataset and Temperature materials.The results show: atmospheric water vapor relative humidity changes 21.6% will lead to absolute deformation amount: 12.2cm errors in horizontal changes map and 5.29cm errors in height changes map.
出处
《测绘科学》
CSCD
北大核心
2009年第S1期20-22,共3页
Science of Surveying and Mapping
基金
地震行业科研专项(20070813)资助
