Patent ID: 7746272

Claim:
A method of processing a first set of GNSS signal data derived from at least three carriers of navigation system signals of a first group of transmitters and a second set of GNSS signal data derived from two carriers of navigation system signals of a second group of transmitters, comprising a. applying to the first set of GNSS signal data and the second set of GNSS signal data a geometry filter using a geometry carrier-phase combination to obtain an array of ambiguity estimates for the geometry carrier-phase combination and associated statistical information; b. applying to the first set of GNSS signal data a first bank of ionosphere filters using a geometry-free ionosphere carrier-phase combination to obtain an array of ambiguity estimates for the ionosphere carrier-phase combination of the first bank of ionosphere filters and associated statistical information; c. applying to the first set of GNSS signal data at least one bank of filters using a geometry-free and ionosphere-free carrier-phase combination to obtain an array of ambiguity estimates for the geometry-free and ionosphere-free carrier-phase combination and associated statistical information; d. applying to the first set of GNSS signal data at least one first code filter using a plurality of geometry-free code-carrier combinations to obtain an array of ambiguity estimates for the code-carrier combinations of the at least one first code filter and associated statistical information; e. applying to the second set of GNSS signal data a second bank of ionosphere filters using a geometry-free ionosphere carrier-phase combination to obtain an array of ambiguity estimates for the ionosphere carrier-phase combination of the second bank of ionosphere filters and associated statistical information; f. applying to the second set of GNSS signal data at least one second code filter using a plurality of geometry-free and ionosphere-free code-carrier combinations to obtain an array of ambiguity estimates for the code-carrier combinations of the at least one second code filter and associated statistical information; and g. combining the arrays of a., b., c., d., e. and f. to obtain a combined array of ambiguity estimates for all carrier phase combinations and associated statistical information.