Research on InSAR 3D imaging algorithm based on multi-angle observation

Interferometric synthetic aperture radar (InSAR) is not affected by weather conditions and can obtain data in a wide range, which is one of the important ways to obtain digital elevation model (DEM). InSAR phase unwrapped is always the key problem in the whole process. The effect of phase wrapping can be effectively solved by using the correlation of SAR image in multi-angle observation. In this paper, based on the original method, iterative calculation is used to solve the effect of unknown viewing angle on the results, and 3D imaging can be realized without observing the observation information of the scene. Finally, this paper verifies the feasibility and practicability of the proposed algorithm through simulation experiments and actual data processing.