Parametric scatterer extraction method for space‐target inverse synthetic aperture radar image CLEAN

Owing to the time variance of inverse synthetic aperture radar (ISAR) imaging plane space targets, scatterers with large heights relative migrate through several Doppler cells. This defocussing in azimuth direction each scatterer cannot be compensated via traditional migration resolution cell (MTRC) compensation method because height is quite different and independently distributed ISAR image. In this study, a parametric azimuth-defocussing model-based CLEAN proposed for space-target First, high-order defocus parameters their influences on image targets were analysed at arc segments. Subsequently, mathematical expression was derived after MTRC phase compensation, an approximate based Fresnel integral provided computational efficiency. model can estimate complex amplitude, coordinates domain by applying sequential quadratic programing algorithm. Finally, validity stability algorithm isolated coupled extraction verified signal-to-noise ratios, simulations.