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A High Resolution Imaging Method for Differential SAR Tomography |
Sun Xi-long Yu An-xi Dong Zhen Liang Dian-nong |
School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China |
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Abstract Four-dimensional reconstruction of urban areas and man-made infrastructure is one of the most important applications of differential SAR tomography. In this situation, the urgent problem of differential SAR tomography is how to achieve satisfying elevation-velocity resolution using sparse samples of space-time plane and preserve azimuth-range resolution simultaneously. An imaging method for differential SAR tomography based on RELAXation (RELAX) algorithm is proposed in the framework of deterministic models. Compared the spatial spectral estimation methods with statistical model, this method do not need to implement a spatial multilooking. Compared with the singular value decomposition method, this method has much better resolution. Results obtained by processing simulated data and real data of ENVISAT-ASAR verify the promising potentiality of this method.
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Received: 03 July 2011
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Corresponding Authors:
Sun Xi-long
E-mail: longlongsun@sohu.com
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