ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,541,029, issued on Feb. 3, was assigned to THALES (Courbevoie, France).
"RNP navigation without GNSS" was invented by Jean-Pierre Arethens (Valence, France), Warody Lombardi (Valence, France) and Vincent Chopard (Valence, France).
According to the abstract* released by the U.S. Patent & Trademark Office: "A position of an aircraft is computed, associated with the radius of a sphere centered around the estimated position of the aircraft and within which the actual position of the aircraft is located with a probability equal to or greater than a predefined threshold. For this purpose, the computation is based on distances from radio transmitters each having a fixed position in a geograp...