FIELD: physics, navigation.
SUBSTANCE: invention relates to a global positioning system for estimating a position, orientation or both, of an object or vehicle. The method and system for position estimation comprise measuring a first carrier phase of a first carrier signal and a second carrier phase of a second carrier signal received by a location-determining receiver (10). A primary real time kinematic (RTK) engine (18) or receiver data processing system (16) estimates a primary integer ambiguity set associated with at least one of the measured first carrier phase and the measured second carrier phase. A quality estimation unit (22) determines if a primary integer ambiguity set is resolved correctly to the predefined reliability rate during an earlier estimation period. A secondary real time kinematic (RTK) engine (20) or receiver data processing system (16) estimates a secondary integer ambiguity set associated with at least one of the measured first carrier phase and the measured second carrier phase during a later period following the earlier estimation period.
EFFECT: improved position and orientation estimation.
16 cl, 9 dwg
