基于InSAR技术的城市地面沉降灾害监测研究
Study on Urban Area Subsidence Monitoring Based on InSAR Technique
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摘要: 基于开放源代码软件平台DORIS和自主开发的大气效应和基线误差消除模块,对河北廊坊市、霸州市胜芳镇2003~2007年ENVISAT卫星的SAR影像进行了差分干涉测量处理。通过该地区的GPS站网,削弱了部分大气对流层折射延迟的影响,并融合SRTM3 DEM对平地效应残留误差进行了估计,从而精确地获取了该时期的地面沉降量及沉降漏斗中心。Abstract: Based on open source software platform DORIS and self-developed software modules for baseline errors correction and atmospheric delay effects mitigation,ENVISAT SAR data(2003-2007) of Langfang and Shengfang town area are processed.12 GPS stations' data are used to mitigate the atmospheric delay effects in interferograms.SRTM3 DEM is introduced to estimate the residuals of flatten earth effects.The center locations of the subsidence cones are calculated and the annual subsidence rates in these areas are precisely acquired.
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