| 摘要 |
A method 200 for navigation signal group delay calibration is provided, whereby a code signal generated in a navigation system platform is measured 202, the code signal including one or more timing delays. An additional code signal generated in the navigation system platform is measured 204, the additional code signal being designated as a timing reference signal. A differential group delay between the code signal and the timing reference signal is mathematically estimated in the navigation system platform 206 to correct for an inaccurate position estimation that would result from the one or more timing delays. An estimated curve fit parameter may be communicated in a navigation message to a navigation system-enabled receiving device to determine the differential group delay for a position accuracy correction. The method is particularly suited to a GPS system implemented with a steerable spot beam antenna. |
