Modified Range Migration Algorithm in GEO SAR system

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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Yang, Wenfu; Liu, Feifeng; Hu, Cheng; Ding, Zegang (Department of EE, Beijing Institute of Technology, 100081, PR China)
Zhu, Yu (Chinese Academy of Space Technology, 100094, PR China)

The key problem of the imaging processing in geosynchronous earth orbit (GEO) SAR is the space-variance of the Doppler parameters, which will result in the defocusing with classical imaging algorithm. In this paper, a Modified Range Migration Algorithm (RMA) is proposed to overcome the space-variance of Doppler parameters by compensating the velocity change along the scene range direction. Furthermore the simulation results fully verify the effectiveness of derived algorithm after velocity compensation.