A method of zero Doppler centroid control in GEO SAR
Conference: EUSAR 2010 - 8th European Conference on Synthetic Aperture Radar
06/07/2010 - 06/10/2010 at Aachen, Germany
Proceedings: EUSAR 2010
Pages: 4Language: englishTyp: PDF
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Authors:
Dong, Xichao; Ding, Zegang (Department of EE, Beijing Institute of Technology, 100081, PR China)
Zhao, Zhiwei (Research and Development Center, China Academy of Space Technology, 100094, PR China)
Abstract:
The paper proposes a new and straightforward derivation method for the two-dimensional attitude control in the satellite local coordinate system in geosynchronous earth orbit (GEO) SAR. The attitude control method considers the earth rotation and elliptical orbit effects, and can compensate the Doppler centroid into zero. Because the GEO SAR platform and the yaw angle are too large, the two-dimensional phase scanning method is put forward to carry out the high accurate compensation of Doppler centriod, which can avoid the difficulty of rotating and stabilizing GEO SAR platform. The simulations validate the correctness of derivation results in this paper.