摘要
基于6景JERS-1 L波段SAR影像,利用小基线集-合成孔径雷达干涉测量技术,通过线性形变相位、非线性形变相位、大气延迟相位以及地形残差相位的分离,提取了腾冲火山地区1995—1997年间地表形变时间序列(雷达视线向),与2003—2004年的GPS观测结果对比表明,SBAS-DInSAR技术提取地壳形变的精度可达亚厘米级。时间序列形变显示胆札-高田断裂两侧形变差异性显著,可能与其下方存在的地壳岩浆囊的活动有关。打鹰山地区地表形变揭示其下方可能存在隐伏断裂。
On the basis of the 6 JERS-1 SAR images, the time series of deformation in Tengchong volcanic area were obtained by SBAS-DInSAR technique through separating the linear deformation phase, the nonlinear deformation phase, the atmospheric phase screen and the DEM residual error phase. Compared with the GPS measurement results, SBAS-DInSAR technique can detect the crustal deformation at the precision of sub-cm level. The deforma- tion of the Danzha-Gaotian fault is obviously different between the two sides,which may relate the chamber below. The deformation pattern of the Dayingshan area indicates that there is probably an buried fault underground.
出处
《大地测量与地球动力学》
CSCD
北大核心
2011年第4期149-153,159,共6页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(40974062)
地震行业科研重点专项(200908029)
