Research on 3D Imaing Method of Muti-Aspect SAR for Complex Structral Buildings

Synthetic Aperture Radar (SAR) 3D imaging for complex structural buildings is a hot research topic in the SAR imaging field. Tomographic SAR and multi-aspect SAR are two main imaging modes for SAR 3D imaging. The former one requires repeat passes and is mainly used in spaceborne SAR. The latter one, which is discussed in this paper, observes the target area from multiple aspect angles and obtains multi-aspect target scattering features. However, it still faces some challenges for 3D imaging of complex structural buildings. The main problem is that the elevation resolution is limited by the anisotropic scattering of the target. To solve this problem, we propose a new 3D imaging method that combines the high accuracy elevation inversion capability of interferometric SAR and the elevation ambiguity resolving capability of multi-aspect SAR. Real data validates the proposed method.