ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,474,488, issued on Nov. 18, was assigned to ATLANTIC INERTIAL SYSTEMS Ltd. (Plymouth, Great Britain).
"Terrain referenced navigation system" was invented by Geoffrey Henderson (Yelverton, Great Britain).
According to the abstract* released by the U.S. Patent & Trademark Office: "A ground vehicle navigation system includes an inertial navigation system arranged to output an orientation estimate of the ground vehicle and a first position estimate of the ground vehicle, a terrain map comprising terrain data, a terrain gradient based navigation unit arranged to output a second position estimate of the ground vehicle based on a comparison between the orientation estimate and terrain gradi...