Gps/glonass precise point positioning with igs real-time service products

Abstract

The International GNSS Service (IGS) in April 2013 started real-time services (IGS-RTS) to provide access to high-precision products such as orbits, clocks and code observation errors. Products containing corrections are delivered to users by the RTCM data stream in real-time. The IGS03 stream which contains corrections for GPS and GLONASS systems is currently in the experimental stage and positioning with its use is still insufficiently investigated in terms of accuracy and reliability of positioning. In this paper we evaluate the impact of the IGS-RTS streams on positioning. In research section we presented the results of the processing of two-week satellite observations registered at five IGS stations located at different latitudes, using the three IGS-RTS streams: IGS01, IGS02 and IGS03, and BKG Ntrip Client (BNC). Post-processing involved the utilization of GPS and GPS+GLONASS signals. Subsequently we analyzed the real-time position determination of MARS IGS station using IGS03 data stream, which showed one of the best performance during the development of observation in post-processing mode. In analysis we applied approach showing the probability of achieving results within the assumed ranges of accuracy (<1.0 m, <0.5 m, <0.2 m, <0.1m). This approach allows the estimation of potential applications, depending on the expected accuracy of positioning.