Full-Aperture Aperture Focusing of Very High Resolution Spaceborne Spaceborne-Squinted Squinted Sliding Spotlight SAR Data
Abstract: In very high resolution spaceborne spaceborne-squinted squinted sliding spotlight synthetic aperture radar, the traditional imaging algorithms based on the equivalent squint range model (ESRM) cannot be applied, because the ESRM model is inaccurate in this case. For this problem, this paper proposes a squint equivalent acceleration range model to precisely take into account the spaceborne spaceborne-squinted squinted curved orbit. Then a full-aperture squint-imaging imaging algorithm is proposed based on this new range model, which can handle the azimuth variation of the equivalent velocity veloc and the range variation of the 2-D D frequency spectrum. The results of the simulation validate the effectiveness of new range model and imaging algorithm.