Modified Range Migration Algorithm in GEO SAR system

Konferenz: EUSAR 2010 - 8th European Conference on Synthetic Aperture Radar
07.06.2010 - 10.06.2010 in Aachen, Germany

Tagungsband: EUSAR 2010

Seiten: 4Sprache: EnglischTyp: 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.