An approach to improve pseudorange differential gps

摘要

The pseudorange residual error of imperfect correc- tion of the ionospheric time delay in pseudorange(PR) dif- ferential global positioning system (DGPS) is analyzed. The different vertical total electron content (TEC) and Slant factors at the pierce points of satellite signals are the Reasons of the residual error. An improved pseudorange Differential approach is proposed and the effect of this new PR differential operation verified by using the simulation.