Image and Signal Processing Methods

Geosynchronous synthetic aperture radar data focusing based on extended keystone transform

[+] Author Affiliations
Bin Hu

Harbin Institute of Technology, No. 92 Xidazhi Street, Harbin 150001, China

National University of Singapore, 4 Engineering Drive 3, Singapore 117583

Yicheng Jiang, Yun Zhang

Harbin Institute of Technology, No. 92 Xidazhi Street, Harbin 150001, China

Tat-Soon Yeo

National University of Singapore, 4 Engineering Drive 3, Singapore 117583

J. Appl. Remote Sens. 9(1), 095042 (Nov 23, 2015). doi:10.1117/1.JRS.9.095042
History: Received May 19, 2015; Accepted October 21, 2015
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Abstract.  In geosynchronous (GEO) synthetic aperture radar (SAR), the synthetic aperture time increases to hundreds of seconds and the signal propagation delay time reaches up to hundreds of milliseconds, resulting in the violation of the stop-and-go assumption and the linear trajectory model. The accurate slant range history is created based on the consideration of the stop-and-go error. Then, an extended keystone transform is proposed to correct the more complicated range cell migration, and a two-dimensional nonuniform Fourier transform is presented to achieve a well-focused image. The simulation results verify the correctness and effectiveness of the proposed processing method in GEO SAR.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Bin Hu ; Yicheng Jiang ; Yun Zhang and Tat-Soon Yeo
"Geosynchronous synthetic aperture radar data focusing based on extended keystone transform", J. Appl. Remote Sens. 9(1), 095042 (Nov 23, 2015). ; http://dx.doi.org/10.1117/1.JRS.9.095042


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