Assessment of the Multi-GNSS PPP Performance Using Precise Products from the Wuhan Analysis Centre (original) (raw)

Performance of the Precise Point Positioning (PPP) technique for GNSS positioning is strongly dependant on a quality of used satellite orbit and clock product. Within this study, three different versions of precise products provided by the analytical centre of the Wuhan University were evaluated by processing various combinations of GNSS systems constellations over a five months long period in 2020 with RTKLIB software. The results show that final and rapid version of the precise products could offer a centimetre level of positioning accuracy in static daily PPP while the ultra-rapid version utilizing 24 hours of predicted products performed significantly worse. In this regard, a positive effect on positioning accuracy was reached when including Galileo signals in processing of the ultrarapid version product. When studying coordinate's repeatability over the selected time period, the best results were obtained for a combination of GPS and GLONASS signals.