摘要
本文通过采用小基线InSAR技术,对离散的DInSAR干涉对进行时序分析,获取黑龙江省兰西县城区2012年的线性地面沉降速率,通过去除大气延迟相位计算非线性形变量,进而获取时间上连续的沉降量。通过分析兰西县城区的沉降幅度、分布及其随时间变化的情况,发现研究区最大沉降速率达到2.4cm/年,地面沉降累积量随时间变化基本上呈线性的沉降。最后利用相邻轨道Radarsat-2数据独立计算的结果进行对比验证,相对误差在4mm/年以内,均方差为0.13cm/年。两者计算结果的一致性说明了本文研究区InSAR计算结果的准确性。
In this paper,the linear surface deformation in 2012 was obtained in Lanxi county of Heilongjiang Province by using small baseline InSAR technology to analysis discrete DInSAR observations.Then the nonlinear deformation was retrieved by removing atmospheric delay phase,and temporally continuous subsidence field was obtained.By analyzing Lanxi county ground subsidence distribution and surface deformation change over time,it was found that the maximum subsidence rate in the study area is 2.43cm/year and the cumulative amount of land subsidence is essentially linear with time.Finally,the calculated result of the adjacent track Radarsat2 data was compared to verify accuracy,the relative error is less than 4mm/year and the mean square error is 0.132cm/year.The consistency between the results illustrated the accuracy of results in the study area.
出处
《遥感信息》
CSCD
2014年第4期76-79,84,共5页
Remote Sensing Information
基金
国家地质调查项目(1212011140039)
