A study on differential GPS corrections estimated using the EMD method

The error sources of GPS include satellite errors (ephemeris error and satellite clock error), atmospheric errors (ionospheric error and troposheric error) and receiver errors (clock error, multipath error, interference error and thermal noise). The DGPS technique can reduce most of satellite and atmospheric errors. This reducing can significantly improve the accuracy of GPS positioning. The DGPS requires high quality GPS receiver at known reference stations and estimate the errors for each satellite in view. This correction is broadcast to all DGPS users by the Internet using the NTRIP standard. In this paper, a novel DGPS corrections estimation method based on EMD is proposed. The method is illustrated on real and simulated data, and the results are show great capability to reduce the effect of multipath and interference.