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1 Geodesy and Cartography
1 Research and Technical Papers of Polish Association for Transportation Engineers in Cracow. Series: Proceedings
1 Zeszyty Naukowo-Techniczne Stowarzyszenia Inżynierów i Techników Komunikacji w Krakowie. Seria: Materiały Konferencyjne

2 2018

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Pozycjonowanie satelitarne techniką PPP RTK

Uznański A.

Zeszyty Naukowo-Techniczne Stowarzyszenia Inżynierów i Techników Komunikacji w Krakowie. Seria: Materiały Konferencyjne

2018

Nr 1(115)

105--122

W toku rozwoju pomiarów satelitarnych pojawiła się technika określana mianem Precise Point Positioning RTK (Real Time Kinematic), która umożliwia precyzyjne wyznaczanie pozycji punktów w czasie rzeczywistym jednym odbiornikiem satelitarnym. Pozycjonowanie tą techniką nie wymaga dostępu do strumieni danych z naziemnych sieci referencyjnych, jak np. w Polsce ASG-EUPOS. Jest to atut szczególnie na obszarach bez zasięgu sieci GSM. Idea tych pomiarów mogłaby się wydawać bardzo atrakcyjną dla wykonawców robót geodezyjnych. W pracy przedstawiono podstawy teoretyczne, akcentując wymagania, atuty i mankamenty tej techniki pomiarowej. Analiza techniki PPP RTK wskazuje na umiarkowane możliwości ich ekonomicznie uzasadnionego zastosowania w praktyce, ale technika nieustannie jest rozwijana i w przyszłości może być bardziej konkurencyjna w Polsce.

During the development of satellite measurements, a technique called Precise Point Positioning RTK (Real Time Kinematic) has emerged. It enables us to determine precisely position in real time with a single satellite receiver. Positioning with this technique does not require access to data streams from terrestrial reference networks, such as ASG-EUPOS in Poland. This is an advantage especially in areas with no GSM coverage. The idea of these measurements might seem very attractive for geodetic contractors. The work presents theoretical foundations, emphasizing the requirements, advantages and drawbacks of this measurement technique. The analysis of the PPP RTK technique indicates moderate possibilities of their economically justified application in practice, but the technique is constantly developed and it may be more competitive in Poland in the future.

Accuracy of Precise Point Positioning (PPP) with the use of different International GNSS Service (IGS) products and stochastic modelling

Kiliszek D., Szołucha M., Kroszczyński K.

Geodesy and Cartography

2018

Vol. 67, no. 2

207--238

This paper provides analyses of the accuracy and convergence time of the PPP method using GPS systems and different IGS products. The official IGS products: Final, Rapid and Ultra Rapid as well as MGEX products calculated by the CODE analysis centres were used. In addition, calculations with weighting function of the observations were carried out, depending on the elevation angle. The best results were obtained for CODE products, with a 5-minute interval precision ephemeris and precise corrections to satellite clocks with a 30-second interval. For these calculations the accuracy of position determination was at the level of 3 cm with a convergence time of 44 min. Final and Rapid products, which were orbit with a 15-minute interval and clock with a 5 minute interval, gave very similar results. The same level of accuracy was obtained for calculations with CODE products, for which both precise ephemeris and precise corrections to satellite clocks with the interval of 5 minutes. For these calculations, the accuracy was 4 cm with the convergence time of 70 min. The worst accuracy was obtained for calculations with Ultra-rapid products, with an interval of 15 minutes. For these calculations, the accuracy was 10 cm with a convergence time of 120 min. The use of the weighting function improved the accuracy of position determination in each case, except for calculations with Ultra-rapid products. The use of this function slightly increased the convergence time, in addition to the CODE calculation, which was reduced to 9 min.