Patent ID: 8242953
Filing Date: 2012-08-14
Classification: G01S

Abstract:
1. A method for mitigating atmospheric errors in code and carrier phase measurements based on signals received from a plurality of satellites in a global navigation satellite system, the method comprising: estimating at least one residual ionospheric delay, the at least one residual ionospheric delay modeled as at least one state in the Kalman filter, and wherein a state update function of the Kalman filter for the at least one residual ionospheric delay includes at least one baseline distance dependent factor, wherein the at least one baseline distance dependent factor corresponds to a distance between a reference receiver and a mobile receiver; and updating an estimated position of the mobile receiver in accordance with the at least one estimated residual ionospheric delays and the code and carrier phase measurements, wherein the estimated position of the mobile receiver is modeled as a state in the Kalman filter.