Precise Point Positioning (PPP) is a technique used to determine the position of receiver antenna without communication with the reference station. It may be an alternative solution to differential measurements, where maintaining a connection with a single RTK station or a regional network of reference stations RTN is necessary. This situation is especially common in areas with poorly developed infrastructure of ground stations. A lot of research conducted so far on the use of the PPP technique has been concerned about the development of entire day observation sessions. However, this paper presents the results of a comparative analysis of accuracy of absolute determination of position from observations which last between 1 to 7 hours with the use of four permanent services which execute calculations with PPP technique such as: Automatic Precise Positioning Service (APPS), Canadian Spatial Reference System Precise Point Positioning (CSRS-PPP), GNSS Analysis and Positioning Software (GAPS) and magicPPP - Precise Point Positioning Solution (magicGNSS). On the basis of acquired results of measurements, it can be concluded that at least two-hour long measurements allow acquiring an absolute position with an accuracy of 2-4 cm. An evaluation of the impact on the accuracy of simultaneous positioning of three points test network on the change of the horizontal distance and the relative height difference between measured triangle vertices was also conducted. Distances and relative height differences between points of the triangular test network measured with a laser station Leica TDRA6000 were adopted as references. The analyses of results show that at least two hours long measurement sessions can be used to determine the horizontal distance or the difference in height with an accuracy of 1-2 cm. Rapid products employed in calculations conducted with PPP technique reached the accuracy of determining coordinates on a close level as in elaborations which employ Final products.
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Cai Ch. Gao Y. (2007). Precise point positioning using combined GPS and GLONASS observations Journal of Global Positioning Systems vol 6 no 1 pp. 13-22.
Choy S. (2011). High accuracy precise point positioning using a single frequency GPS receiver Journal of Applied Geodesy vol 5 pp. 59-69.
Gao Y. Chen K. (2004). Performance analysis of precise point positioning using reatime orbit and clock products Journal of Global Positioning Systems vol 3 no 1-2 pp. 95-100.
Gao Y. (2011) Precise point positioning and its challenges aided GNSS and signal tracking Inside GNSS vol 1 no 8 pp 16-18.
Geng J. Meng X. Dodson A.H. Teferle F.N. (2010) Integer ambiguity resolution in precise point positioning: method comparison Journal of Geodesy vol 84 no 9 pp. 569-581.
Guo Q. (2015). Precision comparison and analysis of four online free PPP services in static positioning and tropospheric delay estimation GPS Solutions vol. 19 no 4 pp. 537-544.
Kouba J. Héroux P. (2001). Precise point positioning using IGS orbit and clock products GPS Solutions vol 5 no 2 pp. 12-28.
Leandro R.F. Santos M.C. Langley R.B. (2009). Analyzing GNSS data in precise point positioning software GPS Solutions vol 15 no 1 pp. 1-13.
Rizos C. Janssen V. Roberts C. Grinter T. (2012). Precise point positioning: is the era of differential GNSS positioning drawing to an end? FIG Working Week 2012 Rome Italy.
Rogowski J. В. Figurski M. (2004). Ziemskie systemy i układy odniesienia oraz ich realizacje. W: Nowe obowiązujące niebieskie i ziemskie systemy i układy odniesienia oraz ich wzajemne relacje. Warszawa IGiK s. 37–68.
Stępniak K. Wielgosz P. Paziewski J. (2012). Badania dokładności pozycjonowania techniką PPP w zależności od odległości sesji obserwacyjnej oraz wykorzystanych systemów pozycjonowania satelitarnego Biuletyn WAT nr 1/2012 s. 429-450.
Zumberge J.F. Heflin M.B. Jefferson D.C. Watkins M.M. Webb F.H. (1997) Precise point positioning for the efficient and robust analysis of GPS data from large networks Journal of Geophysical Research vol. 102(B3) pp. 5005–5017.