InSAR DEM Reconstruction Based on Backprojection Algorithm in Two Converse Flights
- Resource Type
- Conference
- Authors
- Hu, Xiaoning; Xiang, Maosheng; Wang, Bingnan; Fu, Xikai
- Source
- 2019 6th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR) Synthetic Aperture Radar (APSAR), 2019 6th Asia-Pacific Conference on. :1-4 Nov, 2019
- Subject
- Aerospace
Components, Circuits, Devices and Systems
Computing and Processing
Fields, Waves and Electromagnetics
Geoscience
Signal Processing and Analysis
InSAR DEM reconstruction
BP algorithm
data fusion
iteration
- Language
- ISSN
- 2474-2333
Interferometric synthetic aperture radar (InSAR) can be used to extract digital elevation model (DEM) with high accuracy. However, the side looking geometry of synthetic aperture radar (SAR) may cause geometric distortions such as shadow and layover in the mountainous terrain, which will reduce the quality of generated DEM. Fusion of two or more different aspects of InSAR data can deal with this problem. We propose an InSAR DEM reconstruction method based on backprojection (BP) algorithm in two converse flights. This method utilizes the feature of BP algorithm that geocoding has been realized in imaging process to simplify the fusion process of multi-aspect InSAR data. In addition, an iterative DEM extraction method is introduced to improve DEM accuracy. Experimental results verify the effectiveness of the proposed method.