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SCIENCE CHINA Information Sciences, Volume 59, Issue 6: 062306(2016) https://doi.org/10.1007/s11432-015-5388-5

''Stop-and-go'' error analysis of geosynchronous SAR

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  • ReceivedApr 13, 2015
  • AcceptedMay 27, 2015
  • PublishedSep 29, 2015

Abstract

In this paper, the slant range error introduced by the ``stop-and-go" assumption is analyzed in detail. Owing to the high orbit and long synthetic aperture time of geosynchronous SAR (Geo-SAR), the slant range error introduced by the ``stop-and-go" assumption should be considered. In addition, an accurate signal propagation delay time equation of Geo-SAR based on circle orbit is presented, and the error of the ``stop-and-go" assumption is demonstrated by simulation. An ``equivalent position" model is proposed and validated by simulation. The error of various powers of ``stop-and-go" slant range is analyzed using Legendre orthogonal series expansion. The limitation of the stop-and-so assumption is proved by point target simulation.


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