Reference : An Evaluaton of Real-Time Troposphere Products Based on mult-GNSS Precise Point Posi)oning

	Document type :	Scientific congresses, symposiums and conference proceedings : Unpublished conference
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
	Focus Areas :	Computational Sciences
	To cite this reference:	http://hdl.handle.net/10993/29904

Title :	An Evaluaton of Real-Time Troposphere Products Based on mult-GNSS Precise Point Posi)oning
Language :	English
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]
Publication date :	21-Feb-2017
Peer reviewed :	No
On invitation :	No
Audience :	International
Event name :	COST Action ES1206 GNSS4SWEC Final Workshop
Event date :	21-02-2017 to 23-02-2017
Event organizer :	ESTEC, ESA
Event place (city) :	Noordwijk
Event country :	The Netherlands
Keywords :	[en] 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.
Funders :	Fonds National de la Recherche - FnR ; COST Action ES1206 GNSS4SWEC
Name of the research project :	POSILUX
Target :	Researchers ; Professionals
Permalink :	http://hdl.handle.net/10993/29904
Commentary :	Conference Proceedings
FnR project :	FnR ; FNR6823109 > Wenwu Ding > POSILUX > A multi-GNSS Real-Time Precise Point Positioning System and its Application in Luxembourg and the Greater Region > 01/06/2014 > 31/05/2016 > 2013

	File(s) associated to this reference
	Fulltext file(s): File Commentary Version Size Access Open access RT PPP ZTD Evaluation DingTeferle.pdf As presented Author postprint 5.1 MB View/Open

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