ALEXANDRIA, Va., July 16 -- United States Patent no. 12,360,249, issued on July 15, was assigned to Honeywell International Inc. (Charlotte, N.C.).

"Systems and methods using kalman filter monitors to detect spoofed GNSS signals" was invented by Ruth Dagmar Kreichauf (River Falls, Wis.) and Reed R May (Seminole, Fla.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A system comprises a GNSS receiver that receives a GNSS signal and produces GNSS measurements; a plurality of inertial sensors that produce inertial data; and a navigation system comprising a Kalman filter and an inertial navigation unit. The Kalman filter receives the GNSS measurements and calculates pseudo-range residuals, delta-range residuals, p...