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Unambiguous Reconstruction and High-Resolution Imaging for Multiple-Channel SAR and Airborne Experiment Results

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5 Author(s)
Wei Jing ; Nat. Lab. of Radar Signal Process., Xidian Univ., Xi'an ; Mengdao Xing ; Cheng-Wei Qiu ; Zheng Bao
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Azimuth ambiguity occurs in synthetic aperture radar (SAR) systems due to the well-known constraint of minimum antenna area, particularly at high resolutions and wide swaths. A space time domain method can be utilized to remove this ambiguity if the multiple-channel data are available. In this letter, a modified approach is presented to determine the filter weight vectors. This approach was successfully applied to the real data, which were collected by an experimental airborne multiple-channel SAR system. The channel imbalance and the error in antenna phase center position are analyzed in detail.

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IEEE Geoscience and Remote Sensing Letters  (Volume:6 ,  Issue: 1 )