InSAR Elevation Inversion Method Based on Backprojection Model with External DEM

Leida xuebao

Bingnan WANG¹  Maosheng XIANG¹  Zhongbin WANG¹  Xiaoning HU¹ 

[1] Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, China;

关键词: elevation inversion;    insar;    external dem;    backprojection (bp) algorithm;    sar;   

DOI  :  10.12000/JR20144

来源: DOAJ

【 摘 要 】

When Interferometric Synthetic Aperture Radar (InSAR) is used to obtain the Digital Elevation Model (DEM), highly sloped terrains will make interferometric fringes dense and increase the difficulty of phase unwrapping, which will affect the accuracy of phase unwrapping and elevation inversion. To solve this problem, an InSAR elevation inversion method based on BackProjection (BP) model with an external DEM is proposed. This model achieves imaging and InSAR DEM inversion in a uniform BP geographic space and introduces an external DEM as auxiliary information. These processes, in turn, can remove most phases of the terrain and reduce the density of interferometric fringes and phase wrapping. Additionally, the proposed method can avoid the procedures of image registration and phase unwrapping in most cases, which simplifies traditional InSAR processing and achieves high processing accuracy. A simulation experiment and X-band InSAR data processing were performed to verify the effectiveness of the proposed method.

【 授权许可】

Unknown