Geosynchronous synthetic aperture radar data focusing based on extended keystone transform

Bin Hu; Yicheng Jiang; Yun Zhang; Tat-Soon Yeo

doi:10.1117/1.JRS.9.095042

23 November 2015 Geosynchronous synthetic aperture radar data focusing based on extended keystone transform

Bin Hu, Yicheng Jiang, Yun Zhang, Tat-Soon Yeo

Author Affiliations +

Journal of Applied Remote Sensing, Vol. 9, Issue 1, 095042 (November 2015). https://doi.org/10.1117/1.JRS.9.095042

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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Bin Hu, Yicheng Jiang, Yun Zhang, and Tat-Soon Yeo "Geosynchronous synthetic aperture radar data focusing based on extended keystone transform," Journal of Applied Remote Sensing 9(1), 095042 (23 November 2015). https://doi.org/10.1117/1.JRS.9.095042

Published: 23 November 2015

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KEYWORDS

Synthetic aperture radar

Doppler effect

Fourier transforms

Satellites

Detection and tracking algorithms

Imaging systems

Radar imaging

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