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Homogeneous zenith total delay parameter estimation from European permanent GNSS sites / Wolfgang Söhne in Bulletin of geodesy and geomatics BGG, vol 69 n° 1 (March 2010)

Public [article]  inBulletin of geodesy and geomatics BGG > vol 69 n° 1 (March 2010) . - pp 11 - 20 Titre : Homogeneous zenith total delay parameter estimation from European permanent GNSS sites Type de document : Article/Communication Auteurs : Wolfgang Söhne, Auteur ; Mariusz Figurski, Auteur ; K. Szafranek, Auteur Année de publication : 2010 Article en page(s) : pp 11 - 20 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes IGN] estimation statistique [Termes IGN] propagation troposphérique [Termes IGN] réseau permanent EUREF [Termes IGN] rotation de la Terre [Termes IGN] station GNSS [Termes IGN] traitement de données GNSS Résumé : (Auteur) Starting in 2001 the EUREF Permanent Network (EPN) Local Analysis Centres (LAC) are delivering Zenith Total Delay (ZTD) parameters which were combined at the BKG (Bundesamt für Kartographie und Geodäsie, Germany) combination facility. The results have been step-by-step improved, depending on several changes of the processing scheme, leading to an internal precision of 2-3 mm ZTD. The availability of a set of homogeneously processed GPS satellite orbits, clocks and Earth Rotation Parameters (ERP) covering a period of more than a decade (the so-called Potsdam-Dresden reprocessing) motivated MUT (Military University of Technology, Poland) to the all-in-one processing of the EPN stations for the same period. The applied strategy thereby followed the guidelines for EPN processing. While the improvement in coordinate estimation has been recently demonstrated, this paper investigates the quality of the ZTD parameters estimated together with the coordinates. Comparisons with the existing EUREF combined solution, with IGS solutions and with radiosonde data will be presented to evaluate the possible improvement in ZTD estimation by reprocessing activities. Numéro de notice : A2010-588 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=77986 [article]

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Relation between the Italian and European height systems / Alessandro Caporali in Bulletin of geodesy and geomatics BGG, vol 69 n° 1 (March 2010)

Public [article]  inBulletin of geodesy and geomatics BGG > vol 69 n° 1 (March 2010) . - pp 59 - 71 Titre : Relation between the Italian and European height systems Type de document : Article/Communication Auteurs : Alessandro Caporali, Auteur ; F. Cauli, Auteur ; R. Maseroli, Auteur Année de publication : 2010 Article en page(s) : pp 59 - 71 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux [Termes IGN] altitude normale [Termes IGN] conversion altimétrique [Termes IGN] European vertical GPS reference network [Termes IGN] Italie [Termes IGN] réseau de nivellement [Termes IGN] réseau permanent EUREF [Termes IGN] Rete Dinamica Nazionale [Termes IGN] Sardaigne [Termes IGN] Sicile [Termes IGN] système de référence altimétrique [Termes IGN] système de référence local [Termes IGN] transformation de coordonnées Résumé : (Auteur) The availability at continental scale of a gravimetric quasi geoid model such as EGG08 (European Gravimetric Geoid 2008) and of geodetic networks such as the European Permanent Network of EUREF and its national densifications have the potential to bridge national height networks. The offset and tilts which have traditionally affected the national vertical networks can be calibrated and the resulting continent-wide vertical network represents a common height datum. The relation between the Italian vertical datum, defined in terms of nodal points of fist order leveling lines, and the European EVRS datum is addressed here, on the basis of normal heights from geopotential numbers and of ellipsoidal heights from GEOTRAV GPS/leveling points re-adjusted on the new Rete Dinamica Nazionale consistently with the ETRF2000 frame. Because of the different reference tide gauges, the Continental Italy, Sicily and Sardinia points are analyzed separately. It is shown that these three vertical datums have offsets relative to the EUVN of - 86 + 1, -156 + 1 and - 353 + 2 mm respectively. Continental Italy and Sicily also exhibit a small but non negligible tilt in the east and north direction respectively. Once these offsets and tilts are accounted for, the leveling data fit the values predicted by the GPS and EGG08 data to less than 10 cm rms, consistently with the level of accuracy of the EGG08 quasi geoid. Our result provide those transformation formulas which are necessary to convert normal heights in the national datum into normal heights in the European datum, consistently with the INSPIRE specifications. Numéro de notice : A2010-589 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=77987 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
013-2010011	RAB	Revue	Centre de documentation	En réserve L003	Disponible