Journal of the Korea Institute of Military Science and Technology (한국군사과학기술학회지)

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
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The Effect Analysis and Correction of Phase errors by Satellite Attitude Errors using the FSA for the Spotlight SAR Processing

Spotlight SAR 신호처리기법 FSA를 이용한 위성 자세오차로 인한 위상오차 영향분석 및 보정

  • Published : 2007.06.29
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Abstract

In this paper, we have described and simulated the effect analysis and correction of phase errors in the SAR rawdata induced by satellite attitude errors such as drift, jitter. This simulation is based on the FSA(Frequency Scaling Algorithm) for high resolution image formation of the Spotlight SAR. Phase errors produce the degradation of SAR image quality such as loss of resolution, geometric distortion, loss of contrast, spurious targets, and decrease in SNR. To resolve this problem, this paper presents method for correction of phase errors using the PGA(Phase Gradient Algorithm) in connection with the FSA. Several results of the phase errors correction are presented for Spotlight SAR rawdata.

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References

  1. J. Mittermayer, A. Moreira, O. Loffeld, "Spotlight SAR Data Processing Using the Frequency Scaling Algorithm", IEEE Trans. on Geosc. and Remote Sensing, Vol. 37, No. 5, pp.2198-2214, Sept. 1999 https://doi.org/10.1109/36.789617
  2. Walter G. Carrara, Ron S. Goodman, Ronald M. Majewski, "Spotlight Synthetic Aperture Radar Signal Processing Algorithms", Artech House, 1995
  3. D. E. Wahl, P. H. Eichel, D. C. Ghiglia, and C. V. Jakowatz. Jr, "Phase gradient autofocus - a robust tool for high resolution SAR phase correction", IEEE Trans. on Aerospace and Electronic Systems, Vol. 30, No.3, pp.827-835, July 1994 https://doi.org/10.1109/7.303752
  4. A. Moreira, J. Mittermayer, R. Scheiber, "Extended Chirp Scaling Algorithm for Airand Spacebome SAR Data Processing in Stripmap and ScanSAR Imaging Modes", IEEE Trans. on Geosci. and Remote Sensing, Vol. 34, No.5, pp.1123-1136, September, 1996 https://doi.org/10.1109/36.536528
  5. E. Borner, R. Lord, J. Mittermayer, R. Bamler, "Evaluation of TerraSARX Spotlight Processing Algorithm. Accuracy based on a new Spotlight Raw Data Simulator", Proc. IGARSS 2003
  6. Michael Inggs, "Tutorial #4 - Imaging Radar As a Mature Technology", Remote Sensing Arabia - Riyadh, May 7-11, 2005