2:00 PM - 2:15 PM
[SGD01-14] Development of coordinate calculation strategy for GEONET station using multi GNSS PPP aiming future management scheme of the national coordinate
Keywords:multi GNSS, PPP, GEONET
With the improvement of accuracy and real-time property of satellite positioning technologies, private companies are starting to provide many kind of GNSS positioning services. These services adopts their own system to refer geodetic frameworks, which might cause confusion and trouble in future since combination of them possibly brings inconsistency of positioning results. In addition, Japan is located in the region of active plate motion on the earth and suffers stable crustal motion as well as episodic large crustal motion caused by earthquakes and volcanic activities. Under these circumstances, in order for many positioning services to rapidly get positions consistent with national coordinate system, it is required to develop the system that properly manages the fundamental positional information as a national framework including its temporal variation, and that timely provides to positioning service providers and those users needing for the information.
The GSI focused on the precise point positioning (PPP) technologies using plural satellite positioning systems (multi-GNSS) for monitoring the spatial-temporal change of Japanese geodetic framework in detail. From 2020, the GSI started the research project to development of the positioning method to monitor the coordinates of GEONET stations nationwide using multi-GNSS PPP. The scheme is: First, using mixed RINEX observation data of IGS stations globally distributed, we estimate precise orbit of GPS, CLONASS and QZSS satellites, their clocks and so on by post-processing. Then, using them, the time-series of the coordinates of GEONET stations nationwide are derived by PPP-AR. The preliminary comparison of the coordinates for the six IGS stations included GEONET between PPP results and IGS daily solutions, they showed high consistency with in the repeatability.
In our presentation, we plan to report the present situation of the research and the result of detailed comparison of PPP solution and IGS daily solution as well as the comparison between PPP solution and GEONET operational solution for all the GEONET stations processed.
The GSI focused on the precise point positioning (PPP) technologies using plural satellite positioning systems (multi-GNSS) for monitoring the spatial-temporal change of Japanese geodetic framework in detail. From 2020, the GSI started the research project to development of the positioning method to monitor the coordinates of GEONET stations nationwide using multi-GNSS PPP. The scheme is: First, using mixed RINEX observation data of IGS stations globally distributed, we estimate precise orbit of GPS, CLONASS and QZSS satellites, their clocks and so on by post-processing. Then, using them, the time-series of the coordinates of GEONET stations nationwide are derived by PPP-AR. The preliminary comparison of the coordinates for the six IGS stations included GEONET between PPP results and IGS daily solutions, they showed high consistency with in the repeatability.
In our presentation, we plan to report the present situation of the research and the result of detailed comparison of PPP solution and IGS daily solution as well as the comparison between PPP solution and GEONET operational solution for all the GEONET stations processed.