The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 18, 2025
Filed:
Oct. 21, 2021
Atlantic Inertial Systems Limited, Plymouth, GB;
Geoffrey Henderson, Yelverton, GB;
ATLANTIC INERTIAL SYSTEMS LIMITED, Plymouth, GB;
Abstract
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 gradient data extracted from the terrain map and an iterative algorithm unit arranged to determine a system error state in each iteration. In each iteration the iterative algorithm unit is arranged to receive the first position estimate and the second position estimate; and update the system error state for the next iteration based on the system error state, the first position estimate and the second position estimate. The iterative algorithm unit may then apply the updated system error state to the INS measurements.