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Focusing of Tandem Bistatic-Configuration Data With Range Migration Algorithm

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6 Author(s)
Qisong Wu ; Key Lab. for Radar Signal Process., Xidian Univ., Xi''an, China ; Yi Liang ; Mengdao Xing ; Qiu, Chengwei
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A bistatic range migration algorithm (RMA) based on an exact analytical bistatic point-target (PT) spectrum in the tandem configuration is proposed in this letter. For the conventional geometry-based bistatic formula method, the derived spectrum is only a quasi-analytical one because a variable called half-quasi-bistatic angle (HQBA) is not exactly analytically expressed. The key step of the proposed algorithm is to deduce an analytical HQBA in the tandem configuration, and thus, an exact analytical closed-form PT spectrum is acquired. Based on this analytical spectrum, a bistatic RMA is presented. It is demonstrated that this algorithm can handle the bistatic tandem configuration with extremely large baseline/range ratio and can also be applied to wide-swath imaging.

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Geoscience and Remote Sensing Letters, IEEE  (Volume:8 ,  Issue: 1 )