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An Evaluaton of Real-Time Troposphere Products Based on mult-GNSS Precise Point Posi)oning
Ding, Wenwu; Teferle, Felix Norman; Kazmierski, Kamil et al.
2017COST Action ES1206 GNSS4SWEC Final Workshop
 

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Keywords :
Global Navigation Satellite Systems; Precise Point Positioning; Atmospheric Water Vapour; Weather; Now-Casting
Abstract :
[en] When employing observations from multiple Global Navigation Satellite System (GNSS) the performance of real-time (RT) GNSS meteorology can be improved. In this paper, we describe an operational RT system for extracting zenith tropospheric delay (ZTD) using a modified version of the PPP-wizard. Multi-GNSS, including GPS, GLONASS and Galileo, observation streams are processed using a RT PPP strategy based on RT satellite orbit/clock products from CNES. A continuous experiment for 30 days is conducted, in which the RT observation streams of 20 globally distributed stations are processed. The initialization time and accuracy of the RT troposphere products using single/multi-system observations are evaluated. The effect of RT PPP ambiguity resolution is also evaluated. The results reveal that the RT troposphere products based on single system observations can fulfill the requirements of meteorological application, in which the GPS-only solution is better than the GLONASS-only solution in both initialization and accuracy. The performance can also be improved by applying RT PPP ambiguity resolution and utilizing multi-GNSS observations. Specifically, we notice that the ambiguity resolution is more effective in improving the accuracy, whereas the initialization process can be better accelerated by multi-GNSS observations. Combining all systems, RT troposphere products with an average accuracy of about 8 mm in ZTD can be achieved after an initialization process of approximately 9 minutes, which supports the application of multi-GNSS observations and ambiguity resolution for RT meteorological applications.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Ding, Wenwu;  State Key Laboratory of Geodesy and Earth's Dynamics
Teferle, Felix Norman ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit
Kazmierski, Kamil;  Wroclaw University of Environmental and Life Sciences
Laurichesse, Denis;  Centre Natonal d’Etudes Spatales
Yuan, Yunbin;  State Key Laboratory of Geodesy and Earth's Dynamics
External co-authors :
yes
Language :
English
Title :
An Evaluaton of Real-Time Troposphere Products Based on mult-GNSS Precise Point Posi)oning
Publication date :
21 February 2017
Event name :
COST Action ES1206 GNSS4SWEC Final Workshop
Event organizer :
ESTEC, ESA
Event place :
Noordwijk, Netherlands
Event date :
21-02-2017 to 23-02-2017
Audience :
International
Focus Area :
Computational Sciences
FnR Project :
FNR6823109 - A Multi-gnss Real-time Precise Point Positioning System And Its Application In Luxembourg And The Greater Region, 2013 (01/06/2014-31/05/2016) - Wenwu Ding
Name of the research project :
POSILUX
Funders :
FNR - Fonds National de la Recherche [LU]
COST Action ES1206 GNSS4SWEC
Commentary :
Conference Proceedings
Available on ORBilu :
since 22 February 2017

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