TITLE:
Precise Point Positioning and Differential Solutions by Online GNSS Calculation Tools and RTKLIB: A Comparative Study
AUTHORS:
Diogoye Diouf, Mapathé Ndiaye, Laurent Morel
KEYWORDS:
PPP, GNSS, CSRS-PPP, RTX, MAGIC/GNSS, IGN-PPP, RTKLIB
JOURNAL NAME:
International Journal of Geosciences,
Vol.14 No.2,
February
13,
2023
ABSTRACT: The
recent advances in GNSS positioning of the recent decades have been possible by
the development of increasingly efficient software and online calculation tools. The differences between these
online PPP calculation tools result in a different level of performance. Our
study shows that for 24-hour or 6-hour observation time, the Canadian
Spatial Reference System for PPP (CSRS-PPP), CenterPoint RTX Post-Processing
(RTX), Magic/GNSS, Institut Geographique National-PPP (IGN-PPP) and
RTKLIB tools have almost similar level of
performance with International Terrestrial Reference Frame (ITRF)
solutions considered as reference solution. Average deviations on the three
components X, Y and Z for the different tools compared to ITRF solutions do not
exceed 1 cm. However, the CSRS-PPP tool gives deviations of less than 5 mm.
Calculations from the observations of 2 h and 1 h show that the RTX and
CSRS-PPP tools keep deviations similar to those obtained with 24 h and 6 h,
while RTKLIB and IGN-PPP give deviations exceeding 6 cm and sometimes failures
of some calculations for IGN-PPP.