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RTK Measurement to the Nearest Reference Station in SKPOS Service
Smolík, Karol ; Ferianc, Martin ; Butkovská, Simona
Since 2006 SKPOS provides its real-time positioning services based on the RTK method using a virtual reference station. The network RTK method compensates the lack of a classic RTK measurements directly at the reference station, where the accuracy decreases with the increased distance from the reference station. With more Galileo and BeiDou satellites, generating a network solution becomes more complicated and it is not possible to generate a network solution from all received satellites. Therefore, it may be more appropriate in the vicinity of reference stations and in worse observing conditions such as urban canyons, etc., to use data directly from the nearest reference station with the full number of observed satellites. This article represents the results of several RTK tests comparing network RTK measurement with RTK measurement at the nearest reference station by the quality parameters such as accuracy, length of initialization time, number of satellites and PDOP parameter.
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Testing of SKPOS services
Butkovská, Simona ; Nosek, Jakub (oponent) ; Machotka, Radovan (vedoucí práce)
Geodetic and Cartographic Institute Bratislava (GKÚ) has been providing the Slovak real-time positioning service (SKPOS) since 2006 as a multifunctional tool for precise real-time positioning of objects and phenomena using GNSS. SKPOS offers three basic positioning services, that can be used in real-time or for postprocessing. The work is dedicated to testing the two most frequently used services, the centimeter and millimeter. To test the SKPOS_cm centimeter service, three test measurements were performed on selected SKPOS mountpoints. The centimeter service currently uses exclusively the concept of a virtual reference station, while GKÚ was interested in expanding the service to include the concept of the so-called “nearest reference station”. For that reason, in 2022 GKÚ decided to perform the first test measurements also in the new concept in order to consider its possible future implementation within SKPOS services. In addition to the centimeter service, the SKPOS_mm millimeter service was also tested, which consists in postprocessing. The work is dedicated to SKPOS, the description of the performed test measurements, the analysis and evaluation of the achieved results.
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