1. A method for extrapolating base data corresponding to a base, the method comprising the steps of: receiving the base data at a rover receiver, the base data comprising: a plurality of base parameters, each specific base parameter in the plurality of base parameters corresponding to a specific navigation satellite selected from a plurality of navigation satellites and corresponding to a specific base epoch selected from a plurality of base epochs; receiving a plurality of satellite orbit parameters at the rover receiver, each specific satellite orbit parameter in the plurality of satellite orbit parameters corresponding to a specific navigation satellite selected from the plurality of navigation satellites; calculating for each specific navigation satellite and for each specific base epoch a specific computed component; calculating for each specific base epoch a specific common component; calculating for each specific navigation satellite and for each specific base epoch a specific information component; calculating for each specific information component and for each specific base epoch a specific extrapolation function; calculating for each specific information component a specific extrapolated information component extrapolated to a rover epoch referenced to a clock in the rover receiver, wherein the specific extrapolated information component is calculated from: at least one base parameter received at the rover receiver prior to the rover epoch; and the specific extrapolation function; calculating for each specific navigation satellite a specific updated computed component at the rover epoch; and calculating for each specific navigation satellite the sum of the extrapolated specific information component at the rover epoch, the updated computed component at the rover epoch, and the common component.