Reference : Comparative Analysis of Real-Time Precise Point Positioning Zenith Total Delay Estimates
Scientific congresses, symposiums and conference proceedings : Poster
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
http://hdl.handle.net/10993/12496
Comparative Analysis of Real-Time Precise Point Positioning Zenith Total Delay Estimates
English
Ahmed, Furqan mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
Vaclavovic, Pavel [Research Institute of Geodesy, Topography and Cartography, Czech Republic > Geodetic Observatory Pecny]
Teferle, Felix Norman mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
Dousa, Jan [Research Institute of Geodesy, Topography and Cartography, Czech Republic > Geodetic Observatory Pecny]
Bingley, Richard [University of Nottingham > Nottingham Geospatial Institute]
Laurichesse, Denis [Centre National d'Etudes Spatiales, France]
13-Dec-2013
No
No
International
American Geophysical Union Fall Meeting 2013
December 09-13, 2013
American Geophysical Union
San Francisco
United States of America
[en] Global Navigation Satellite Systems ; Global Positioning System ; Real-Time ; Zenith Total Delay ; Integrated Water Vapour ; GNSS Meteorology
[en] The use of observations from Global Navigation Satellite Systems (GNSS) in operational meteorology is increasing worldwide due to the continuous evolution of GNSS. The assimilation of near real-time (NRT) GNSS-derived zenith total delay (ZTD) estimates into local, regional and global scale numerical weather prediction (NWP) models is now in operation at a number of meteorological institutions. The development of NWP models with high update cycles for nowcasting and monitoring of extreme weather events in recent years, requires the estimation of ZTD with minimal latencies, i.e. from 5 to 10 minutes, while maintaining an adequate level of accuracy for these. The availability of real-time (RT) observations and products from the IGS RT service and associated analysis centers make it possible to compute precise point positioning (PPP) solutions in RT, which provide ZTD along with position estimates. This study presents a comparison of the RT ZTD estimates from three different PPP software packages (G-Nut/Tefnut, BNC2.7 and PPP-Wizard) to the state-of-the-art IGS Final Troposphere Product employing PPP in the Bernese GPS Software. Overall, the ZTD time series obtained by the software packages agree fairly well with the estimates following the variations of the other solutions, but showing various biases with the reference. After correction of these the RMS differences are at the order of 0.01 m. The application of PPP ambiguity resolution in one solution or the use of different RT product streams shows little impact on the ZTD estimates.
http://hdl.handle.net/10993/12496

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