A method for combined use of a local rtk system and a...

Details A method for combined use of a local rtk system and a... A method for combined use of a local rtk system and a...

G - Physics

01

S

G01S 5/14 (2006.01)

Patent

CA 2550600

The present invention includes a method for a combined use of a local RTK system and a regional, wide-area, or global differential carrier-phase positioning system (WADGPS) in which disadvantages associated with the RTK and the WADGPS navigation techniques when used separately are avoided. The method includes using a known position of a user receiver that has been stationary or using an RTK system to initialize the floating ambiguity values in the WADGPS system when the user receiver is moving. Thereafter, the refraction~ corrected carrier-phase measurements obtained at the user GPS receiver are adjusted by including the corresponding initial floating ambiguity values and the floating ambiguity values are treated as well known (small variance) in subsequent processes to position the user receiver in the WADGPS system.

L'invention porte sur un procédé d'utilisation combinée d'un système RTK local et d'un système de positionnement par phase différentielle de porteuse, régional, de zone de couverture étendue, ou global (WADGPS) permettant d'éviter les inconvénients associés aux techniques de navigation RTK et WADGPS utilisées séparément. Ledit procédé consiste à utiliser la position connue du récepteur d'un utilisateur stationnaire, ou un système RTK, pour lancer la mesure des valeurs des ambiguïtés flottantes du système WADGPS lorsque le récepteur de l'utilisateur se déplace, puis à ajuster les mesures de phase de porteuse corrigées par réfraction obtenues par le récepteur GPS de l'utilisateur, en incluant les valeurs des ambiguïtés flottantes de départ, puis à traiter lesdites valeurs comme étant connues (faible variance) dans les processus suivants.

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