Bibliografie VÚGTK
Accuracy evaluation of ionospheric delay from multi-scale reference networks and its application for fast PPP ambiguity resolution
Douša, Jan ; Václavovic, Pavel ; Zhao, Lewen

Zdroj: Symposium GIS Ostrava 2021 Advances in Localization and Navigation : 12 stran ISSN: 1213-239X

Typ publikace: sbornikove prispevky
Rozsah: 12 stran

Odkaz: https://doi.org/10.31490/9788024845050-14
Anotace:
The Precise Point Positioning (PPP) can achieve a fast ambiguity resolution (PPP-RTK) when augmented with precise ionospheric delays derived from regional GNSS networks. In this study, the accuracy of the ionospheric delay derived from multi-scale networks are assessed and used for the GPS and Galileo PPP-RTK demonstration. First, the convergence time of the GPS-only PPP are evaluated based on the GFZ final and CNES real-time products. Results indicated that an average convergence time of 30 min and 20 min is needed for the CNES and GFZ float solutions, respectively, in order to achieve a decimetre level horizontal position accuracy. After applying the ambiguity resolution method, 20% and 35% improvements are observed reaching 24min and 13min, respectively. Then, the accuracy of ionospheric delays derived from the ambiguity-fixed PPP and the CODE global products are assessed. A short-baseline comparison indicated that the mean bias and standard deviation of the derived multi-day ionospheric errors are within 0.15 TECU and 0.06 TECU, respectively, with a presence of a daily periodic term. The accuracy of the interpolated ionospheric delay from global models are more related to the location of the stations, ranging from 1 TECU to 3 TECU. Finally, precise ionospheric delays derived from the EUREF permanent network with the inter-station distance larger than 73 km are selected for ionospheric modelling at the user location. Results indicated that the PPP ambiguity resolution can be achieved within a minute. After enlarging the inter-station distance to 209 km, ambiguity resolution can be achieved within several epochs with improved fixing rate as well.

Citace: DOUŠA, Jan, Pavel VÁCLAVOVIC a Lewen ZHAO. Accuracy evaluation of ionospheric delay from multi-scale reference networks and its application for fast PPP ambiguity resolution. In: Symposium GIS Ostrava 2021 Advances in Localization and Navigation. Ostrava: Vysoká škola Báňská-Technická univerzita Ostrava, 2021, s. 12. ISBN 978-80-248-4505-0. ISSN 1213-239X. Dostupné z: doi:10.31490/9788024845050-14

Záznam se nachází v těchto sbírkách:
Výsledky VÚGTK > Podle útvarů / oddělení > 24: Geodézie a geodynamika
Výsledky VÚGTK > Vědečtí pracovníci VÚGTK > Ing. Pavel Václavovic
Výsledky VÚGTK > Vědečtí pracovníci VÚGTK > Ing. Jan Douša, Ph.D.
Dokumentační centrum VÚGTK > Články VÚGTK
Výsledky VÚGTK > Výsledky RIV

 Záznam vytvořen 2022-05-25, poslední editace 2022-06-07


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