差分干涉合成孔径雷达（DInSAR）利用相位差分干涉技术实现了地表微形变的高精度测量。传统的DInSAR采用单站观测方式，获取地表三维形变场能力有限，测量精度难以满足地质灾害监测和滑坡机理研究的迫切需求。多角度DInSAR综合利用多角度观测和差分干涉原理，可实现三维形变场的高精度测量。而几何构型的优化设计与三维形变场解算、图像欠相干条件下的差分干涉方法以及时空变大气相位扰动误差影响机理和补偿是实现高精度三维形变场测量的核心问题。本项目拟通过建立基于三维形变测量误差的目标函数，提出基于模拟退火算法的几何构型优化设计方法和加权最小二乘的三维形变场解算方法；提出复杂环境下的永久散射体提取和动态差分干涉等技术实现图像欠相干条件下的差分干涉相位解缠处理；建立时空变大气相位扰动误差模型，提出基于多角度观测数据的大气相位扰动误差估计与补偿方法，为滑坡机理研究和滑坡灾害监测提供新的观测手段和观测数据。

Differential interferometric synthetic aperture radar (DInSAR) is a kind of sensor able to achieve high accurate measurement of surface’s deformation by differential phase technology. However, the traditional DInSAR can only observe the scene from a single angle and is of limited capability in retrieving the three-dimensional (3D) deformation field. Thus, the measurement accuracy cannot meet the urgent needs of geological disaster monitoring and landslide mechanism researches. Multi-angle DInSAR comprehensively utilizes the multi-angle observations and differential interferometric processing, and can realize the highly accurate measurement of 3D deformation field. The key researches includes the optimized design of the geometric configuration, the solutions of the 3D deformation field, the DInSAR processing using low coherent images, and the influences mechanism and the compensation of the space-time variant atmospheric errors. Through the establishment of objective function based on the 3D deformation measurement errors, the project intends to propose the optimization design of the geometric configuration based on the annealing algorithm, and the permanent scatterers extraction and dynamic differential interferometric techniques under the complex conditions to realize the DInSAR unwrapping algorithms using the low coherent images. The project will also establish the phase disturbance error mechanism of space-time variant atmosphere and the compensation method based on multi-angle observation data. The aforementioned researches will provide new observation means and data and open the new prospect for the mechanism study of landslide research and landslide hazard monitoring.