地壳运动速度场是揭示青藏高原构造变形机制和掌握地震活动规律的关键依据。目前以GPS为主建立的速度场为研究大尺度构造变形提供了完善的框架，呈现了清晰的全局运动特征，然而受观测条件等限制，其空间分辨率还不够。自90年代初至今，欧空局ERS-1/2和Envisat卫星采集了大量的数据，2014年又发射了Sentinel-1A，这使得利用InSAR加密GPS速度场具有广阔的前景。基于此考虑，本项目拟研究：1)建立完善的InSAR/GPS联合反演速度场的方法；2)联合InSAR与GPS建立整个青藏高原精细的水平速度场；3)基于此速度场建立青藏高原构造变形的运动学和动力学模型；4)以青藏高原东北缘为实验区，探索利用CGPS和Sentinel-1数据建立三维时变速度场的方法。本项研究旨在探索建立下一代中国大陆地壳运动速度场的新方法，并为青藏高原构造变形机制和地震灾害研究提供关键的基础数据和理论依据。

Crustal velocity field is crucial to study the mechanisms of continental deformation and earthquakes in the Tibetan Plateau. The current GPS velocity field provides an excellent reference frame and reveals a global picture on large-scale deformation in Tibet. However, its spatial resolution is low due to difficult access to most parts of the plateau. Since early 1990s, ESA has launched ERS-1/2, Envisat and the recent Sentinel-1A satellites, hence we can significantly improve the spatial resolution of GPS velocity field using InSAR. Here we propose 1) to develop an approach for inverting velocity field using InSAR and GPS; 2) to determine a large-scale horizontal velocity field using InSAR and GPS data over the whole Tibetan Plateau; 3) to develop the kinematic and dynamic models on Tibet deformation constrained by the horizontal velocity field; 4) to develop a novel approach for 3D time-variable velocity field using continuous GPS and Sentinel-1 observations, and utilise it in north-eastern Tibet. Our primary aim is to develop a prototyping methodology for the next generation of geodetic velocity field in China continent. The outcomes will be able to provide keen datasets and valuable thoughts on the mechanisms of continental deformation and the earthquake hazards in Tibet.