“Stop-and-go” error analysis of geosynchronous SAR

地球同步轨道SAR走停模式误差分析

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-andgo” 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.

创新点

由于地球同步轨道SAR的超高轨道高度和超长合成孔径时间,使得低轨道SAR的成像方法不能完全适用于地球同步轨道SAR。本文分析了传统“stop-and-go”假设所引起的斜距误差对地球同步轨道SAR成像的影响,并提出了一种正圆轨道下的成像几何模型。基于此模型,找到了能用于成像的等效中点位置。利用legendre 正交级数展开,分析了"stop-and-go"假设所引起的斜距误差的具体形式。最后,通过点目标仿真,验证了"stop-and-go"假设的局限性和本文提出的模型的有效性。

This is a preview of subscription content, access via your institution.

References

  1. 1

    Tomiyasu K, Pacelli J L. Synthetic aperture radar imaging from an inclined geosynchronous orbit. IEEE Trans Geosci Remote Sens, 1983, 21: 324–329

    Article  Google Scholar 

  2. 2

    Madsen S N, Edelstein W, DiDomenico L D. A geosynchronous synthetic aperture radar for tectonic mapping, disaster management and measurements of vegetation and soil moisture. In: Proceedings of IEEE International Conference on Geoscience and Remote Sensing Symposium (IGARSS), Sydney, 2001. 447–449

    Google Scholar 

  3. 3

    Madsen S N, Chen C, Edelstein W. Radar options for global earthquake monitoring. In: Proceedings of IEEE International Conference on Geoscience and Remote Sensing Symposium (IGARSS), Toronto, 2002. 1483–1485

    Google Scholar 

  4. 4

    Guarnieri A M, Tebaldini S, Rocca F, et al. GEMINI: geosynchronous sar for earth monitering by interferometry and imaging. In: Proceedings of IEEE International Conference on Geoscience and Remote Sensing Symposium (IGARSS), Munich, 2012. 210–213

    Google Scholar 

  5. 5

    Barber B C. Theory of digital imaging from orbital synthetic aperture radar. Int J Rem Sens, 1985, 6: 1009–1057

    Article  Google Scholar 

  6. 6

    Raney R K. Doppler properties of radars in circular orbits. Intern J Remote Sens, 1986, 7: 1153–1162

    Article  Google Scholar 

  7. 7

    Prats-Iraola P, Scheiber R. High precision SAR focusing of TerraSAR-X experimental staring spotlight data. In: Proceedings of IEEE International Conference on Geoscience and Remote Sensing Symposium (IGARSS), Munich, 2012. 3576–3579

    Google Scholar 

  8. 8

    Liu Y, Xing M D, Sun G C. Echo model analysis and imaging algorithm for high-resulution SAR on high-speed platform. IEEE Trans Geosci Remote Sens, 2012, 50: 634–646

    Google Scholar 

  9. 9

    Hu C, Long T, Zeng T, et al. The accurate focusing and resolution analysis method in geosynchronous SAR. IEEE Trans Geosci Remote Sens, 2011, 49: 634–646

    Article  Google Scholar 

  10. 10

    Zhao B J, Qi X Y, Song H J. The accurate fourth-order doppler parameters calculation and analysis for geosynchronous SAR. In: Proceedings of European Conference on Synthetic Aperture Radar (EUSAR), Nuremberg, 2012. 615–618

    Google Scholar 

  11. 11

    Huang L J, Hu D H, Ding C B, et al. A general two-dimensional spectrum based on polynomial range model for medium-earth-orbit synthetic aperture radar signal processing. In: Proceedings of ICSPS, Dalian, 2010, 3: 662–665

    Google Scholar 

  12. 12

    Huang L J. The study of Medium-earth-orbit SAR iamging algorithm. Dissertation for the Doctoral Degree. Beijing: Institute of Electronics, Chinese Academy of Sciences, 2011

    Google Scholar 

  13. 13

    Eldhuset K. A new fourth-order processing algorithm for spaceborne SAR. IEEE Trans Aerosp Electron Syst, 1998, 34: 824–835

    Article  Google Scholar 

Download references

Author information

Affiliations

Authors

Corresponding author

Correspondence to Yurun Tian.

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Tian, Y., Guo, S. & Yu, W. “Stop-and-go” error analysis of geosynchronous SAR. Sci. China Inf. Sci. 59, 062306 (2016). https://doi.org/10.1007/s11432-015-5388-5

Download citation

Keywords

  • geosynchronous SAR
  • stop-and-go assumption
  • equivalent position model
  • Legendre orthogonal series
  • error analysis

关键词

  • 地球同步轨道SAR
  • 走停模式假设
  • 等效中点模型
  • 勒让德正交级数
  • 误差分析