Method of managing additional filters in a satellite...

Details Method of managing additional filters in a satellite... Method of managing additional filters in a satellite...

G - Physics

01

S

G01S 5/14 (2006.01)

Patent

CA 2647560

Method of managing additional filters in a navigation system fitted in a vehicle (1) and which provides, in a journey of the vehicle, at least one position of the vehicle by using a main filter for merging data originating from a visible constellation of satellites (2, 4, 5, 6) present above a horizon of the vehicle, the additional filters each excluding the data originating from one of the satellites to obtain a corrected position should the excluded satellite fail, characterized in that the method comprises the steps of: - determining, from a position of the vehicle, a theoretical constellation of satellites (2, 3, 4, 5, 6) present above the horizon, - for any satellite present in the theoretical constellation, creating and maintaining an additional filter excluding this satellite.

Procédé de gestion de filtres additionnels dans un système de navigation qui équipe un véhicule (1) et qui fournit, lors d'un trajet du véhicule, au moins une position du véhicule en utilisant un filtre principal de fusion de données provenant d'une constellation visible de satellites (2, 4, 5, 6) présents au-dessus d'un horizon du véhicule, les filtres additionnels excluant chacun les données provenant d'un des satellites pour obtenir une position corrigée en cas de défaillance du satellite exclu, caractérisé en ce que le procédé comprend les étapes de: - déterminer, à partir d'une position du véhicule, une constellation théorique de satellites (2, 3, 4, 5, 6) présents au-dessus de l'horizon, - pour tout satellite présent dans la constellation théorique, créer et maintenir un filtre additionnel excluant ce satellite.

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