Squint model interferometric ISAR imaging based on respective reference range selection and squint iteration improvement

Aiming at interferometric inverse synthetic aperture radar (InISAR) imaging on squint model, a new method based on respective reference range selection (RRRS) and squint iteration improvement (SII) is proposed in this study. The influence of squint model mainly includes two aspects, namely accessional phase and image distortion. The three-dimensional (3D) imaging results are degraded greatly with the increment of squint angle by using traditional InISAR imaging algorithm. On the basis of the RRRS, the image registration is well achieved. Then, after a few times of SII and distortion correction, the performance of 3D reconstruction was improved. Simulation results confirmed the effectiveness of the proposed method.