Abstract

Recently, the accuracy of precise point positioning (PPP) has improved significantly thanks to PPP products from several services. These services provide different PPP products in terms of their ability at ambiguity resolution (AR) and the number of available satellite systems. We would like to study how additional non -GPS systems and AR treatment affect PPP accuracy. By processing 24h GNSS data at 47 IGS permanent stations with different options for AR treatment and the combination of different satellite systems, our results show that there is no accuracy improvement on the 24h solution (2.1, 2.1, 5.8mm in North, East and Up components). However the combination of GPS + GLONASS + GALILEO with GPS AR gives the best accuracy on the epoch-by-epoch solution (6.6, 6.2, 20.2mm). Compared with the cases of GPS only with AR, this option can improve the accuracy up to 26% on the Up component