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Near real-time estimation of water vapour in the troposphere using ground GNSS and the meteorological data / Jaroslaw Bosy in Annales Geophysicae, vol 30 n° 9 (September 2012)  

Public [article]  inAnnales Geophysicae > vol 30 n° 9 (September 2012) . - 13 p. ; pp 1379 - 1391 Titre : Near real-time estimation of water vapour in the troposphere using ground GNSS and the meteorological data Type de document : Article/Communication Auteurs : Jaroslaw Bosy, Auteur ; J. Kaplon, Auteur ; Witold Rohm, Auteur ; et al., Auteur Année de publication : 2012 Article en page(s) : 13 p. ; pp 1379 - 1391 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale [Termes IGN] données météorologiques [Termes IGN] EUPOS [Termes IGN] modèle atmosphérique [Termes IGN] Pologne [Termes IGN] propagation troposphérique [Termes IGN] surveillance météorologique [Termes IGN] teneur en vapeur d'eau [Termes IGN] tomographie Résumé : (Auteur) The near real-time (NRT) high resolution water vapour distribution models can be constructed based on GNSS observations delivered from Ground Base Augmentation Systems (GBAS) and ground meteorological data. Since 2008 in the territory of Poland, a GBAS system called ASGEUPOS (Active Geodetic Network) has been operating. This paper addresses the problems concerning construction of the NRT model of water vapour distribution in the troposphere near Poland. The first section presents all available GNSS and ground meteorological stations in the area of Poland and neighbouring countries. In this section, data feeding scheme is discussed, together with timeline and time resolution. The high consistency between measured and interpolated temperature value is shown, whereas some discrepancy in the pressure is observed. In the second section, the NRT GNSS data processing strategy of ASG-EUPOS network is discussed. Preliminary results show fine alignment of the obtained Zenith Troposphere Delays (ZTDs) with reference data from European Permanent Network (EPN) processing center. The validation of NRT troposphere products against daily solution shows 15mm standard deviation of obtained ZTD differences. The last section presents the first results of 2-D water vapour distribution above the GNSS network and application of the tomographic model to 3-D distribution of water vapour in the atmosphere. The GNSS tomography model, working on the simulated data from numerical forecast model, shows high consistency with the reference data (by means of standard deviation 4mmkm1 or 4 ppm), however, noise analysis shows high solution sensitivity to errors in observations. The discrepancy for real data preliminary solution (measured as a mean standard deviation) between reference NWP data and tomography data was on the level of 9mmkm1 (or 9 ppm) in terms of wet refractivity. Numéro de notice : A2012-749 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.5194/angeo-30-1379-2012 Date de publication en ligne : 27/09/2012 En ligne : https://doi.org/10.5194/angeo-30-1379-2012 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33601 [article]