ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,487,349, issued on Dec. 2, was assigned to BAE Systems Information and Electronic Systems Integration Inc. (Nashua, N.H.).

"Generalized angle-based tracker (GABT)" was invented by Matthew Anderson (Mont Vernon, N.H.) and Bradley J. Bell (Manchester, N.H.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method, system, and computer readable medium for performing a generalized angle-based tracker for a target determines angle-based information from a target signal, and initializes a Stationary Surface Filter (SSF), a Moving Surface Filter (MSF), and a Pseudorange Kalman Filter (PKF) with the angle-based information. Next, the SSF and MSF are scored by the ...