Joint domain localisation (JDL) is a popular reduced-dimension space-time adaptive processing (STAP) technique for clutter suppression in an air-borne radar system. Here. the authors develop an improved JDL method by exploiting persymmetric covariance matrix. referred to as persymmetric joint domain localisation (Per-JDL). https://www.bekindtopets.com/save-now-Rx-Chorulon-HCG-for-Cattle-save-extra/