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多时相Sentinel-1A InSAR的连盐高铁沉降监测分析
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多时相Sentinel-1A InSAR的连盐高铁沉降监测分析
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Journal Article
多时相Sentinel-1A InSAR的连盐高铁沉降监测分析
2021
Overview
P237; 多时相InSAR技术具有探测大范围毫米级地表形变的能力,已被广泛应用于地面沉降监测.近几年,应用多时相InSAR技术监测以高铁为代表的大尺度人造线状地物形变备受关注.本文将C波段SAR数据用于高铁沿线路基形变监测,应用相位稳定性分析和改进的StaMPS技术来增加相干性点的密度和形变参数解算的稳定性.采用研究区时间跨度为21个月的47景Sentinel-1A数据,对连(云港)盐(城)高铁及其沿线区域进行多时相InSAR分析,并利用同时期连续的北斗导航卫星系统(BeiDou navigation satellite system,BDS)观测数据对线性沉降速率和时序位移分别进行监测分析,进而对比验证二者的沉降监测结果.研究结果表明:利用C波段的Sentinel-1A数据能够获取毫米级的线性形变速率和时序位移序列,InSAR与BDS二者平均时序位移均方根误差为3.8 mm,与BDS监测结果相比取得很好的一致性,且连盐高铁线路整体表现稳定.
Publisher
河海大学地球科学与工程学院,江苏南京211100%南京信息工程大学遥感与测绘工程学院,江苏南京210044%北方信息控制研究院集团有限公司,江苏南京211153
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