The article presents a modified scheme of determining the accuracy parameter of SBAS (Satellite Based Augmentation System) positioning with use of two supporting systems: EGNOS (European Geostationary Navigation Overlay Service) and SDCM (System of Differential Correction and Monitoring). The proposed scheme is based on the weighted mean model, which combines single solutions of EGNOS and SDCM positions in order to calculate the accuracy of positioning of the aerial vehicle. The applied algorithm has been tested in a flight experiment conducted in 2020 in north-eastern Poland. The phase of approach to landing of a Diamond DA 20-C1 aircraft at the EPOD airport (European Poland Olsztyn Dajtki) was subjected to numerical analysis. The Septentrio AsterRx2i geodesic receiver was installed on board of the aircraft to collect and record GPS (Global Positioning System) observations to calculate the navigation position of the aircraft. In addition, the EGNOS and SDCM corrections in the “*.ems” format were downloaded from the real time server data. The computations were realized in RTKPOST library of the RTKLIB v.2.4.3 software and also in SciLab application. Based on the conducted research, it was found that the accuracy of aircraft positioning from the EGNOS+SDCM solution ranged from -1.63 m to +3.35 m for the ellipsoidal coordinates BLh. Additionally, the accuracy of determination of the ellipsoidal height h was 1÷28% higher in the weighted mean model than in the arithmetic mean model. On the other hand, the accuracy of determination of the ellipsoidal height h was 1÷28% higher in the weighted mean model than for the single EGNOS solution. Additionally, the weighted mean model reduced the resultant error of the position RMS-3D by 1÷13% in comparison to the arithmetic mean model. The mathematical model used in this study proved to be effective in the analysis of the accuracy of SBAS positioning in aerial navigation.
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Znaczenie nawigacji jako dyscypliny naukowej i działalności praktycznej. Wykonane, podjęte i planowane przedsięwzięcia innowacyjne w branży lotniczej. Nowoczesne urządzenia nawigacyjne stosowane w zarządzaniu ruchem lotniczym i związana z tym potrzeba kształcenia kadr do ich obsługi. Rola CKKLC w tej dziedzinie. Perspektywy współpracy naukowo-technicznej z otoczeniem gospodarczym.
EN
Significance of the navigation as the scientific discipline and the practical activity at the same time. The realized, undertaken and planned innovative measures in the aerial branch. The modern navigation systems applied to in the air traffic management system and the need of the cadres training connected with the aforementioned for the service of this devices. The role of the CKKLC in this domain. The perspectives of the scientific and technical co-operation with the economic environment.
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