Abstract
An ortho-rectification scheme for space-borne Synthetic Aperture Radar (SAR) image is investigated in this paper. It was usually achieved by indirect mapping between real SAR image pixels and the Digital Evaluation Model (DEM) grids. However, the precise orbit data cannot be easily obtained and using the Newton algorithm needs more calculation. In order to reduce the time consumed during iteration and further improving the accuracy of the SAR image, we propose a new ortho-rectification method with imaging equation. It removes the coordinate conversion by uniformly using the World Geodetic System 1984 (WGS-84). Moreover, the initial time of each DEM grid can be set according to the iteration result of its adjacent point. Compared to other methods, such as Collinearity Equation method, it costs less time and makes the SAR image more accurate. It is also much easier to be implemented in practice.
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Gao, X., Chen, X., Guo, P. (2009). An Ortho-Rectification Method for Space-Borne SAR Image with Imaging Equation. In: Stephanidis, C. (eds) Universal Access in Human-Computer Interaction. Intelligent and Ubiquitous Interaction Environments. UAHCI 2009. Lecture Notes in Computer Science, vol 5615. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-02710-9_73
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DOI: https://doi.org/10.1007/978-3-642-02710-9_73
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