Patent Document ID: 20140002299
Application ID: 13536912
Patent Flag: 0

Claim One:
1. A method of determining, using a processor, a precise position of a rover located within a region, the method comprising: a. obtaining rover observations comprising code observations and carrier-phase observations of GNSS signals on at least two carrier frequencies over multiple epochs, b. receiving correction data comprising for each of the epochs at least one code bias per satellite, at least one of: (i) a fixed-nature MW bias per satellite or (ii) values from which a fixed-nature MW bias per satellite is derivable, or at least one of: (iii) an ionospheric delay per satellite for each of multiple regional network stations, (iv) non-ionospheric corrections, or (v) information on the corrections continuity for one or more correction components; c. applying the correction data to the rover data using one of (i) creating synthetic reference data for each of the epochs from the correction data for a synthetic station location or (ii) directly correcting the rover measurements with the received corrections, d. determining, using the processor, for each epoch whether a cycle slip has occurred in at least one of (i) the rover observations or (ii) observations at network stations used to prepare the correction data, e. upon determining that a cycle slip has occurred, resetting values of any variables of a set of state variables which are affected by the cycle slip while retaining values of at least some variables of the set which are not affected by the cycle slip, and f. using each epoch of rover observations and correction data to estimate updated values for the set of state variables, the state variables comprising a set of ambiguities and coordinates of a precise rover position.