A method of aligning predicted navigation information

Details A method of aligning predicted navigation information A method of aligning predicted navigation information

H - Electricity

04

Q

H04Q 7/20 (2006.01) G01S 1/00 (2006.01) H04Q 7/36 (2006.01)

Patent

CA 2350006

Disclosed is a method for enhancing data wipeoff using predicted future navigation data and improved timing alignment. Proper time alignment of predicted future navigation data to the navigation data to be wipeoff enhances data wipeoff by reducing or eliminating the amount of incomplete wipeoff. In one embodiment, the future navigation data is predicted for a particular satellite and a first or starting bit in the predicted future navigation data is time aligned to a corresponding reference bit in the navigation data to be wiped off. Specifically, the transmission time at the satellite of the reference bit is determined and added to a propagation delay associated with the satellite to obtain an action time for applying the predicted navigation data at a GPS receiver or WAG client to GPS signals transmitted by the satellite.

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