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Modified Range Migration Algorithm in GEO SAR system
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2010
Year
RadarEngineeringAerospace EngineeringSynthetic Aperture RadarScene Range DirectionSatellite ImagingImaging RadarRadar Image ProcessingInverse ProblemsVelocity CompensationRadar Signal ProcessingGeo Sar SystemRadar ApplicationDoppler Parameters
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.