Reference : The Status of GNSS Data Processing Systems to Estimate Integrated Water Vapour for Us...

	Document type :	Scientific congresses, symposiums and conference proceedings : Paper published in a book
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
	To cite this reference:	http://hdl.handle.net/10993/16925

Title :	The Status of GNSS Data Processing Systems to Estimate Integrated Water Vapour for Use in Numerical Weather Prediction Models
Language :	English
Author, co-author :	Ahmed, Furqan [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
	Teferle, Felix Norman [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
	Bingley, Richard [University of Nottingham]
	Laurichesse, Denis [Centre National d'Etudes Spatiales, France]
Publication date :	2016
Main document title :	IAG 150 Years Proceedings of the 2013 IAG Scientific Assembly, Postdam,Germany, 1–6 September, 2013
Editor :	Willis, Pascal
	Rizos, Chris
Publisher :	Springer
Collection and collection volume :	143
Pages :	587-593
Peer reviewed :	Yes
On invitation :	No
Audience :	International
ISBN :	978-3-319-30895-1
Event name :	International Association of Geodesy Scientific Assembly 2013
Event date :	01-09-2013 to 06-09-2013
Event organizer :	International Association of Geodesy
Event place (city) :	Potsdam
Event country :	Germany
Keywords :	[en] Global Navigation Satellite Systems ; Troposphere ; Zenith Total Delay ; Integrated Water Vapour ; Real-Time ; Near Real-Time ; Post Processing ; Numerical Weather Prediction
Abstract :	[en] Modern Numerical Weather Prediction (NWP) models make use of the GNSS-derived Zenith Total Delay (ZTD) or Integrated Water Vapour (IWV) estimates to enhance the quality of their forecasts. Usually, the ZTD is assimilated into the NWP models on 3-hourly to 6-hourly intervals but with the advancement of NWP models towards higher update rates e.g. 1-hourly cycling in the Rapid update Cycle (RUC) NWP, it has become of high interest to estimate ZTD on sub-hourly intervals. In turn, this imposes requirements related to the timeliness and accuracy of the ZTD estimates and has lead to a development of various strategies to process GNSS observations to obtain ZTD with different latencies and accuracies. Using present GNSS products and tools, ZTD can be estimated in realtime (RT), near real-time (NRT) and post-processing (PP) modes. The aim of this study is to provide an overview and accuracy assessment of various RT, NRT, and PP IWV estimation systems and comparing their achieved accuracy with the user requirements for GNSS meteorology. The NRT systems are based on Bernese GPS Software 5.0 and use a double-differencing strategy whereas the PP system is based on the Bernese GNSS Software 5.2 using the precise point positioning (PPP) strategy. The RT systems are based on the BKG Ntrip Client 2.7 and the PPP-Wizard both using PPP. The PPP-Wizard allows integer ambiguity resolution at a single station and therefore the effect of fixing integer ambiguities on ZTD estimates will also be presented.
Funders :	COST Action ES1206 ; Fonds National de la Recherche - FnR
Name of the research project :	PWVLUX
Target :	Researchers ; Students
Permalink :	http://hdl.handle.net/10993/16925
DOI :	10.1007/1345_2015_178
Other URL :	http://link.springer.com/chapter/10.1007/1345_2015_178
FnR project :	FnR ; FNR1090247 > Furqan Ahmed > > The Potential of Precipitable Water Vapour Measurements from Global Navigation Satellite Systems in Luxembourg > 01/06/2011 > 31/05/2015 > 2011

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