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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Improving VLBI analysis by tropospheric ties in GNSS and VLBI integrated processing
https://orcid.org/0000-0002-7060-5342
https://orcid.org/0000-0001-5679-1153
https://orcid.org/0000-0001-6048-7437
https://orcid.org/0000-0002-3370-1300
https://orcid.org/0000-0002-6183-5920
https://orcid.org/0000-0001-5443-0370
Abstract Tropospheric delay modeling is challenging in high-precision Very Long Baseline Interferometry (VLBI) analysis due to the rapid water vapor variation and imperfect observation geometry, where observations from Global Navigation Satellite Systems (GNSS) co-locations can enhance the VLBI analysis. We investigate the impact of tropospheric ties in the VLBI and GNSS integrated processing during the CONT05–CONT17 campaigns, and present a method that automatically handles the systematic tropospheric tie biases. Applying tropospheric ties at VLBI–GNSS co-locations enhances the observation geometry and improves the solution reliability. The VLBI network is stabilized, with station coordinate repeatability improved by 12% horizontally and by 28% vertically, and the network scale improved by 32%. The Earth Orientation Parameters (EOP) improve by up to 20%. Both zenith delay and gradient ties contribute to the improvement of EOP, whereas the gradient ties contribute mainly to the improvement of length of day and celestial pole offsets.
Improving VLBI analysis by tropospheric ties in GNSS and VLBI integrated processing
https://orcid.org/0000-0002-7060-5342
https://orcid.org/0000-0001-5679-1153
https://orcid.org/0000-0001-6048-7437
https://orcid.org/0000-0002-3370-1300
https://orcid.org/0000-0002-6183-5920
https://orcid.org/0000-0001-5443-0370
Abstract Tropospheric delay modeling is challenging in high-precision Very Long Baseline Interferometry (VLBI) analysis due to the rapid water vapor variation and imperfect observation geometry, where observations from Global Navigation Satellite Systems (GNSS) co-locations can enhance the VLBI analysis. We investigate the impact of tropospheric ties in the VLBI and GNSS integrated processing during the CONT05–CONT17 campaigns, and present a method that automatically handles the systematic tropospheric tie biases. Applying tropospheric ties at VLBI–GNSS co-locations enhances the observation geometry and improves the solution reliability. The VLBI network is stabilized, with station coordinate repeatability improved by 12% horizontally and by 28% vertically, and the network scale improved by 32%. The Earth Orientation Parameters (EOP) improve by up to 20%. Both zenith delay and gradient ties contribute to the improvement of EOP, whereas the gradient ties contribute mainly to the improvement of length of day and celestial pole offsets.
Improving VLBI analysis by tropospheric ties in GNSS and VLBI integrated processing
https://orcid.org/0000-0002-7060-5342
https://orcid.org/0000-0001-5679-1153
https://orcid.org/0000-0001-6048-7437
https://orcid.org/0000-0002-3370-1300
https://orcid.org/0000-0002-6183-5920
https://orcid.org/0000-0001-5443-0370
Abstract Tropospheric delay modeling is challenging in high-precision Very Long Baseline Interferometry (VLBI) analysis due to the rapid water vapor variation and imperfect observation geometry, where observations from Global Navigation Satellite Systems (GNSS) co-locations can enhance the VLBI analysis. We investigate the impact of tropospheric ties in the VLBI and GNSS integrated processing during the CONT05–CONT17 campaigns, and present a method that automatically handles the systematic tropospheric tie biases. Applying tropospheric ties at VLBI–GNSS co-locations enhances the observation geometry and improves the solution reliability. The VLBI network is stabilized, with station coordinate repeatability improved by 12% horizontally and by 28% vertically, and the network scale improved by 32%. The Earth Orientation Parameters (EOP) improve by up to 20%. Both zenith delay and gradient ties contribute to the improvement of EOP, whereas the gradient ties contribute mainly to the improvement of length of day and celestial pole offsets.
Improving VLBI analysis by tropospheric ties in GNSS and VLBI integrated processing
Wang, Jungang (Autor:in) / Ge, Maorong (Autor:in) / Glaser, Susanne (Autor:in) / Balidakis, Kyriakos (Autor:in) / Heinkelmann, Robert (Autor:in) / Schuh, Harald (Autor:in)
Journal of Geodesy ; 96
2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Zur Kombination von VLBI und GNSS
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