Precise absolute time transfer from a satellite system

G - Physics – 01 – S

Patent

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G01S 1/00 (2006.01)

Patent

CA 2716981

Systems and methods according to one or more embodiments are provided for obtaining a precise absolute time using a satellite system. The precise absolute time may be used, for example, as an aid for positioning systems including navigation in attenuated or jammed environments. A method of obtaining precise absolute time transfer from a satellite according to an embodiment comprises: receiving a precision time signal from a satellite, wherein the precision time signal comprises a periodic repeating code; determining a timing phase of the code; receiving additional aiding information; and using the timing phase and the additional aiding information to determine a precise absolute time.

Linvention concerne des systèmes et des procédés selon un ou plusieurs modes de réalisation, qui permettent dobtenir un temps absolu précis en utilisant un système satellite. Le temps absolu précis peut être utilisé, par exemple, comme assistance pour des systèmes de positionnement impliquant la navigation dans des environnements atténués ou encombrés. Un procédé dobtention du transfert du temps absolu précis à partir dun satellite selon un mode de réalisation comprend les étapes consistant à : recevoir un signal de temps de précision à partir dun satellite, ledit signal de temps précision comprenant un code de répétition périodique ; déterminer une phase de temporisation du code ; recevoir une information dassistance supplémentaire ; et utiliser la phase de temporisation et linformation dassistance supplémentaire pour déterminer un temps absolu précis.

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