Use of GNSS Tropospheric Products for Climate Monitoring (Working Group 3)

Conference paper


There has been growing interest in recent years in the use of homogeneously reprocessed ground-based GNSS, VLBI, and DORIS measurements for climate applications. Existing datasets are reviewed and the sensitivity of tropospheric estimates to the processing details is discussed. The uncertainty in the derived IWV estimates and linear trends is around 1 kg m−2 RMS and ± 0.3 kg m−2 per decade, respectively. Standardized methods for ZTD outlier detection and IWV conversion are proposed. The homogeneity of final time series is limited however by changes in the stations equipment and environment. Various homogenization algorithms have been evaluated based on a synthetic benchmark dataset. The uncertainty of trends estimated from the homogenized times series is estimated to ±0.5 kg m−2 per decade. Reprocessed GNSS IWV data are analysed along with satellites data, reanalyses and global and regional climate model simulations. A selection of global and regional reprocessed GNSS datasets and ERA-interim reanalysis are made available through the GOP-TropDB tropospheric database and online service. A new tropo SINEX format, providing new features and simplifications, was developed and it is going to be adopted by all the IAG services.


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© Springer Nature Switzerland AG 2020

Authors and Affiliations

  1. 1.Geodesy and Geospatial Engineering, Institute of Civil Engineering and EnvironmentUniversity of LuxembourgLuxembourg CityLuxembourg
  2. 2.Centre of Applied GeomaticsWarsaw Military University of TechnologyWarszawaPoland
  3. 3.GFZ German Research Centre for GeosciencesPotsdamGermany
  4. 4.Instituto Português do Mar e da AtmosferaLisbonPortugal
  5. 5.Université Paris-SaclaySaint-AubinFrance
  6. 6.Sorbonne UniversitésParisFrance
  7. 7.Max-Planck-Institute for ChemistryMainzGermany
  8. 8.Royal Meteorological Institute of BelgiumBrusselsBelgium
  9. 9.IGN Institut national de l’information géographique et forestièreParisFrance
  10. 10.Department of Geodesy and GeoinformationTU WienWienAustria
  11. 11.University of Beira InteriorCovilhãPortugal
  12. 12.Swiss Federal Office of TopographyKönizSwitzerland
  13. 13.Argonne National LaboratoryLemontUSA
  14. 14.Central Institute for Meteorology and GeodynamicsVeinnaAustria
  15. 15.Geodetic Observatory Pecný, RIGTCOndřejovCzech Republic
  16. 16.Geodetic Observatory PecnýResearch Institute of Geodesy, Topography and CartographyOndřejovCzech Republic
  17. 17.Chalmers University of TechnologyGöteborgSweden
  18. 18.Fondazione Ugo BordoniRomeItaly
  19. 19.Physics Faculty, Department of Meteorology and GeophysicsSofia University “St. Kliment Ohridski”SofiaBulgaria
  20. 20.AEMETMadridSpain
  21. 21.United States Naval ObservatoryWashingtonUSA
  22. 22.Met OfficeExeterUK
  23. 23.Karadeniz Technical UniversityTrabzonTurkey
  24. 24.Centre of Excellence Telesensing of Environment and Model Prediction of Severe EventsUniversity of L’AquilaL’AquilaItaly
  25. 25.The Swedish Mapping, Cadastral and Land Registration AuthorityStockholmSweden
  26. 26.e-GEOS/Centro di Geodesia Spaziale-Agenzia Spaziale ItalianaMateraItaly
  27. 27.Royal Observatory of BelgiumBrusselsBelgium
  28. 28.Instituto Dom LuizUniversity of LisbonLisbonPortugal
  29. 29.Polytechnic Institute of GuardaGuardaPortugal
  30. 30.Department of Geodesy and GeoinformationTU WienWienAustria
  31. 31.Vilnius UniversityVilniusLithuania
  32. 32.Advanced Methods for Satellite Positioning LaboratoryUniversity of Warmia and Mazury in OlsztynOlsztynPoland
  33. 33.Royal Meteorological Institute of BelgiumBrusselsPortugal

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