| 摘要 |
PURPOSE: A method and a system for measuring a group delay error in a GPS and GLONASS(Global Orbiting Navigation Satellite) receiver are provided to measure a group delay error of a plurality of received GLONASS signals by determining the GPS navigation information using the measurement signal. CONSTITUTION: A GPS based navigation information is calculated based on the GPS signal received from a GPS receiver(140). The group delay errors due to the received GLONASS signals from the GLONASS receiver(160) are measured based on the GPS base navigation information. Each GLONASS signal is estimated in response to the GPS based navigation information. The time information corresponding to the measured GLONASS signal is converted from the time information of the GPS based navigation information. The measurement signal is generated by comparing the estimated GLONASS signals with the received GLONASS signal. The measurement signal is processed by an error state kalman filter is used for offsetting the group delay errors in the coupled GPS and GLONASS receiver(120).
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