Browse > Article
http://dx.doi.org/10.5515/KJKIEES.2011.22.1.016

SAR Motion Compensation Using GPS/IMU  

Kim, Dong-Hyun (Department of Electronic Engineering, Yeungnam University)
Park, Sang-Hong (Department of Electronic Engineering, Yeungnam University)
Kim, Kyung-Tae (Department of Electronic Engineering, Yeungnam University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.22, no.1, 2011 , pp. 16-23 More about this Journal
Abstract
This paper suggests a motion compensation technique using GPS/IMU data in order to compensate for phase error caused by undesired motion of radar platform. An actual flight trajectory would be deviate from an ideal straight-constant trajectory with a constant velocity for SAR imaging, due to pitch, roll and yaw motion of aircraft caused by turbulence. This leads to blurred SAR images due to inter-pulse phase errors as well as along-track velocity errors. If the motion compensation is carried out to reduce those errors, SAR image quality can be significantly improved. Simulation results show that the motion compensation technique introduced in this paper is an effective tool to improve SAR image quality against severe motion of radar platform.
Keywords
SAR; GPS; IMU; PRF; Motion Compensation;
Citations & Related Records
연도 인용수 순위
  • Reference
1 W. G. Carrara, R. S. Goodman, and R. M. Majewski, Spotlight Synthetic Aperture Radar-Signal Processing Algorithms, Norwood: MA: Artech House, 1995.
2 M. T. Fennell, R. P. Wishner, "Battlefield awareness via synergistic SAR and MTI exploitation", IEEE Aerospace and Electronic Systems Magazine, vol. 13, no. 2, pp. 39-45, 1998.   DOI
3 S. Buckreuss, "Motion compensation for airborne SAR based on inertial data, RDM and GPS", International Geoscience and Remote Sensing Symposium, IGARSS94, pp. 1971-1973, 1994.
4 Gianfranco Fornaro, Giorgio Franceschetti, and Stefano Perna, "Motion compensation errors: Effects on the accuracy of airborne SAR images", IEEE Aerospace and Electronic Systems Magazine, vol. 41, no. 4, pp. 1338-1352, 2005.   DOI
5 M. Soumekh, "Digital spotlighting and coherent subaperture image formation for stripmap synthetic aperture radar", Proc. Int. Conf. Image Process., Austic, TX, pp. 476-480, Nov. 1994.
6 Ian G. Cumming, Frank H. Wong, Digital Processing of Synthetic Aperture Radar Data Algorithms and Implementation, Artech House, Inc., 2005.