[G06-1] Troposphere monitoring I

[G06-1-04] Main achievements of the Working Group 1 “Advanced GNSS Processing Techniques" of the COST Action ES1206: GNSS for Severe Weather and Climate (GNSS4SWEC)

^○Galina Dick¹, Jan Dousa², Michal Kacmarik³, Pavel Vaclavovic², Eric Pottiaux⁴, Florian Zus¹, Hugues Brenot⁵, Jan Kaplon⁶, Gregor Moeller⁷, Rosa Pacione⁸, Andrea Stuerze⁹, Norman Teferle¹⁰, Laurent Morel¹¹, Pawel Hordyniec⁶ (1.GFZ German Research Centre for Geosciences, Potsdam, Germany, 2.Geodetic Observatory Pecny, RIGTC, Ondrejov, The Czech Republic, 3.Technical University of Ostrava, Ostrava, The Czech Republic, 4.Royal Observatory of Belgium, Brussels, Belgium, 5.Belgian Institute for Space Aeronomy, Brussels, Belgium, 6.Institute of Geodesy and Geoinformatics, Wroclaw University of Environmental and Life Sciences, Wroclaw, Poland, 7.Vienna University of Technology, Vienna, Austria, 8.E-GEOS, s.p.a. & ASI, Matera, Italy, 9.Federal Agency for Cartography and Geodesy,, Frankfurt am Main, Germany, 10.University of Luxembourg, Luxembourg, 11. GeF Laboratory, ESGT – CNAM, Le Mans, France, 12. )

The COST Action ES1206 GNSS4SWEC addresses new and improved capabilities from developments in both the GNSS and meteorological communities. The synergy of all GNSS systems (GPS, GLONASS, Galileo and BeiDou) are used to develop advanced tropospheric products, exploiting the full potential of multi-GNSS water vapour estimates on a wide range of temporal and spatial scales, from real-time monitoring and forecasting of severe weather, to climate research. The Working Group 1 (Advanced GNSS processing techniques) deals with implementing and assessing new methods for GNSS tropospheric monitoring and precise positioning exploiting all modern GNSS constellations, signals, products etc. Besides other goals, WG1 coordinates development of advanced tropospheric products in support of weather numerical and non-numerical nowcasting.These are ultra-fast and high-resolution tropospheric products available in real time or in a sub-hourly fashion and parameters in support of monitoring an anisotropy of the troposphere, e.g. horizontal gradients and tropospheric slant path delays.
We give an overview of WG1 activities and focusing on achievements within Benchmark and Real-time Demonstration campaigns. For the Benchmark campaign a complex data set of GNSS observations and various meteorological data were collected for May-June 2013 which included severe weather events in central Europe. An initial processing of data sets from GNSS and numerical weather models (NWM) provided independently estimated reference parameters – ZTDs and tropospheric horizontal gradients. The Benchmark data set is used for development of an optimal strategy for real-time processing and a validation of tropospheric horizontal gradients and line-of-sight tropospheric slant total delays from GNSS, NWM-raytracing and Water Vapour Radiometer solutions. Real-time campaign is used to demonstrates products achieved in operational GNSS real-time analysis.