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| Accurate Slant Range Model Analysis of Geosynchronous SAR |
| Tian Yu-run①② Yu Wei-dong② |
①(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)
②(University of Chinese Academy of Sciences, Beijing 100190, China) |
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Abstract Due to the high orbit and long synthetic aperture time of Geosynchronous SAR (Geo-SAR), the error brought by the “Stop-Go” assumption has to be considered. In this paper, an accurate signal propagation delay time equation of Geo-SAR based on circle orbit is presented, and the error of “Stop-Go” assumption is shown by simulation. An “equivalent position” model is proposed, and is validated through simulation. Error of different powers of “Stop-Go” slant range is analyzed using Legendre orthogonal series expansion. The limitation of “Stop-Go” assumption and the availability of “Equivalent Position” mode are proved by point target simulation.
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Received: 26 September 2013
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Corresponding Authors:
Tian Yu-run
E-mail: leonbel@163.com
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2014, Vol. 36 
