Focusing Translational Variant Bistatic Forward-Looking SAR Using Keystone Transform and Extended Nonlinear Chirp Scaling

School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China; [email protected] (Z.S.); [email protected] (Z.L.); [email protected] (Y.H.); [email protected] (J.Y.); [email protected] (Z.L.) * Correspondence: [email protected]; Tel.: +86-28-6183-1533 † These authors contributed equally to this work. ‡ Current address: School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China.