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Remote Sensing Letters Volume 10, 2019 - Issue 5
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Articles

A target localization error analysis method for bistatic SAR based on gradient theory

Junjie WuSchool of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, P.R.ChinaCorrespondence[email protected]
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Ning DuSchool of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, P.R.ChinaORCID Iconhttp://orcid.org/0000-0002-4558-9029View further author information
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Yushi XuSchool of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, P.R.ChinaView further author information
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Zhongyu LiSchool of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, P.R.ChinaView further author information
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Jianyu YangSchool of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, P.R.ChinaView further author information
Pages 478-487 | Received 25 Sep 2018, Accepted 08 Jan 2019, Published online: 02 Feb 2019
 
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ABSTRACT

Bistatic range sum (BRS) equation and Doppler equation of bistatic synthetic aperture radar (BiSAR) can be used to achieve target localization in BiSAR images. Because of the double square roots existing in BiSAR range history, it is hard to analyze the target localization error of a BiSAR system by calculating the partial derivatives directly. In this letter, a method utilizing spatial gradient vectors of BRS and Doppler frequency is proposed to derive the analytic solution of localization error for BiSAR. The effectiveness of the method is validated by a numerical simulation experiment.

Additional information

Funding

This work has been supported by National Science Foundation of China (61771113).

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