短基线集技术的合肥地表形变监测研究

Research on surface deformation monitoring of Hefei area based on SBAS

针对如何利用InSAR技术持续性监测合肥市重点区域地表形变的问题,该文提出了一种利用COSMOSkyMed影像数据,基于短基线集技术反演2011—2016年度合肥地区地表形变的方法。结果表明:合肥市重点区域在2011—2016年期间地面形变呈平稳态势,年均形变速率在-5mm/a到5mm/a的地面形变点数量占总地面形变点数量超过95%。技术人员利用研究区内的CORS监测数据与InSAR监测的形变结果进行比较分析后发现,两者间具有较好的一致性,年形变速率差异的均方差为0.3mm/a。

According to the problem of how to continually monitor the surface deformation of key areas in Hefei using InSAR technique,this paper proposes a method that using COSMO-SkyMed image data to reconstruct the surface deformation of Hefei area from 2011 to 2016 based on the short baseline set technique.The results show that the ground deformation in the key area of Hefei City is steady from 2011 to 2016,and the number of ground deformation points with the annual average deformation rate of-5 mm/a to 5 mm/a accounts for more than 95% of the total ground deformation points.By comparing the result of CORS monitoring data with InSAR monitoring deformation data in the area.The researchers discovered there is excellent consistency between them,which is the difference of deformation MSE is only 0.3 mm/a.