Patent ID: 8319684

Claim:
A method of a mobile station, comprising: estimating predicted orbit data of a second satellite at least in part by applying correction information received at the mobile station to previous orbit data for the second satellite stored at the mobile station, wherein the correction information is represented by one or more coefficients of one or more polynomials; combining real-time orbit data of a first satellite and the predicted orbit data of the second satellite at least in part to determine an estimated location for the mobile station; switching from the real-time orbit data of the first satellite to predicted orbit data of the first satellite in response to the real-time orbit data of the first satellite becoming unavailable; interpolating the real-time data of the first satellite and the predicted orbit data of the first satellite to smooth a transition between the real-time data and the predicted orbit data; and using the predicted orbit data of the first satellite at least in part to determine the estimated location for the mobile station.