Application of gps to a railroad navigation system using two...

Details Application of gps to a railroad navigation system using two... Application of gps to a railroad navigation system using two...

B - Operations, Transporting

61

L

B61L 25/02 (2006.01) G01S 5/14 (2006.01) G01S 5/02 (2006.01)

Patent

CA 2218778

A method for determining the location of a vehicle whose movement is constrained to a route whose location is fixed and known, such as a train. An initial estimate of location is made based upon information contained in a route database based on distance traveled from a reset point. The accuracy of the estimated vehicle location is improved through use of just two global positioning satellites.

Méthode de détermination de l'emplacement d'un véhicule dont le déplacement se limite à suivre un itinéraire fixe et connu; par exemple, l'itinéraire d'un train. Une évaluation initiale de l'emplacement est réalisée d'après les informations que contient une base de données sur les itinéraires en tenant compte de la distance parcourue à partir d'un point de repère. L'utilisation de deux satellites de positionnement global seulement permet d'améliorer la précision de l'estimation de l'emplacement du véhicule.

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