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:
Dec. 06, 2011
Filed:
Mar. 16, 2007
Charlie Vacher, Paris, FR;
Jean-claude Goudon, Montelier, FR;
Charlie Vacher, Paris, FR;
Jean-Claude Goudon, Montelier, FR;
Sagem Defense Securite, Paris, FR;
Abstract
A method of managing additional filters in a navigation system fitted to a vehicle, the system acting, during a journey of the vehicle, to deliver at least one position of the vehicle by using a main filter for merging data coming from a constellation of visible satellites present above a vehicle horizon, each additional filter excluding data coming from one of the satellites in order to obtain a corrected position in the event of failure of the excluded satellite. The steps including from a position of the vehicle, determining a theoretical constellation of satellites present above the horizon; and for each satellite present in the theoretical constellation, creating and maintaining an additional filter excluding that satellite.