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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。
The PS-InSAR technique overcomes the effects of conventional D-InSAR technique such as space, incoherent incoherence and atmospheric phase delay, and uses two-dimensional linear (or nonlinear) regression analysis model to obtain the small deformation for the differential interference phase with high coherence point. In this paper, the phase composition and technical process of PS-InSAR technology are summarized. The experimental data of Haiyuan County located in the north plate of Qilian Mountains Haiyuan fault zone are adopted. The ENVISAT ASAR data of 21 scenes from 2003 to 2009 are used to deal with the IPAM module of GAMMA software The displacement rate of the experimental zone is -7 ~ -9 mm / a, the movement direction is from east to west, and the fault zone shows left-lateral strike-slip. The experimental results are in good agreement with GPS, Coulomb stress and geology methods.