Patent ID: 8237609

Claim:
A method of determining a position of an antenna of a GNSS rover from observations of GNSS signals collected at the antenna over multiple epochs and from correction data for at least one of the epochs, comprising: determining a first-epoch rover position relative to a base location for a first epoch using a single-differencing process based on one of (i) fixed carrier-phase ambiguities and (ii) a weighted average of carrier-phase ambiguity candidates which is converged to a predetermined threshold, determining a second-epoch rover position relative to a base location for a second epoch using a single-differencing process, determining a second-epoch update of the first-epoch rover position relative to the base location for the second epoch using a single-differenced delta phase process and combining the first-epoch rover position with the second-epoch update to obtain a second-epoch delta phase rover position relative to a moving base location of the second epoch, and selecting as reliable the second-epoch delta phase rover position if the second-epoch rover position is not based on one of (i) fixed carrier-phase ambiguities and (ii) a weighted average of carrier-phase ambiguity candidates which is converged to a predetermined threshold.