Range Curvature Limitation of the Range-Doppler algorithm Stripmap SAR Processing

摘要

This paper investigates the effects of severe range curvature on range-Doppler SAR processing. The focus is on an airborne, VHF, side-looking SAR without range walk (i.e. imaging geometries with a Doppler centroid of zero). The effects on the focusing of a simulated point target are investigated. The intentioin of the paper is to provide an indication to users of existing range-Doppler processors what performance could be expected at VHF frequencies when no Doppler frequency dependent secondary range compression is performed.