摘要
PS-InSAR技术克服了常规D-InSAR技术的空间、时间失相干和大气相位延迟等影响,对高相干点的差分干涉相位采用二维线性(或非线性)回归分析模型获取微小形变。概述PS-InSAR技术的相位组成、技术处理流程,以位于祁连山海原断裂带北盘的海原县为实验区,采用2003—2009年的21景ENVISAT ASAR数据,以GAMMA软件IPTA模块为软件平台处理得出实验区位移速率为-7~-9 mm/a,运动方向为自东向西,断裂带表现为左旋走滑,实验结果与GPS、库仑应力和地质学方法结果有较好的一致性。
PS-InSAR can get small deformation value of experimental area using two-dimensional linear(nonlinear) phase regression analysis model of high phase-coherent point differential interference phase.PS-InSAR avoids some phase error such as the phase decorrelations in time and space and atmospheric phase delay of D-InSAR.We introduce PS-InSAR phase composition,technology processing.And we take Haiyuan fault zone as experimental area(selecting a small area in Haiyuan fault)and use 21 scenes of ENVISAT ASAR data from 2003 to 2009.We apply IPTA module in GAMMA software and get deformation rate about-7^-9 mm/a in Haiyuan county of Haiyuan fault north plate.Movement direction is from east to west and display a left lateral slip fault is displayed.The experiment results compared with GPS and geological investigations results by other scholars are in good agreement.
出处
《地球科学进展》
CAS
CSCD
北大核心
2012年第4期452-459,共8页
Advances in Earth Science
基金
地震动力学国家重点实验室课题"基于CR/PSINSAR技术的南北地震带中北段地壳形变观测与研究"(编号:LED2010A02)和"汶川地震同震-震后InSAR形变场演化图像与发震断层特征研究"(编号:LED2008A06)资助