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Homogeneous reprocessing of the EUREF permanent network : first experiences and comparisons / A. Kenyeres in Bulletin of geodesy and geomatics BGG, vol 68 n° 3 (October 2009)

Public [article]  inBulletin of geodesy and geomatics BGG > vol 68 n° 3 (October 2009) . - pp 207 - 218 Titre : Homogeneous reprocessing of the EUREF permanent network : first experiences and comparisons Type de document : Article/Communication Auteurs : A. Kenyeres, Auteur ; Mariusz Figurski, Auteur ; P. Kaminski, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : pp 207 - 218 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux [Termes IGN] CATREF [Termes IGN] centre de phase [Termes IGN] données géodésiques [Termes IGN] réseau géodésique permanent [Termes IGN] réseau permanent EUREF [Termes IGN] série temporelle [Termes IGN] traitement de données GNSS Résumé : (Auteur) The GPS analysis strategies, the applied models and software have been considerably changed since the global (IGS - International GNSS Service) and regional (EPN - EUREF Permanent Network) CORS networks are operational. All changes brought along temporal inhomogeneities in the estimated parameters, most apparently in the coordinate time series. After the introduction of the absolute phase centre variation (PCV) models of the satellite and ground GPS antennae, the complete re-analysis of the historical measurements could not be postponed. Within the IGS the re-analysis is now in progress and it will be followed by a coordinated re-processing of the EPN observations from 1996 on. In preparation of the EPN reprocessing a pilot re-analysis has been done at the Military University of Technology (MUT) in Poland covering the complete EPN dataset and similar work has been started at the Royal Observatory of Belgium (ROB). The target of this work was to assess the required resources, the status and completeness of the database and to quantify the improvement gained by the reprocessing. Using the CATREF software (Altamimi et al. 2004) two cumulative solutions have been created by stacking the standard and the reprocessed weekly EPN SINEX solutions. In this paper, the first analysis of the estimated coordinates, velocities and the residual time series is presented. We detected 10-30% improvement in the weekly weighted RMS, we got smoother time series with smaller coordinate repeatability and a more «ITRF2005-conform» velocity field. The results highly support the need for a complete (from global to local level) GPS reprocessing and the establishment of a new ITRS realization in agreement with the GPS absolute PCV models. Numéro de notice : A2009-566 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=77993 [article]

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ETRS89 realization: current status, ETRF2005 and future development / Zuheir Altamimi in Bulletin of geodesy and geomatics BGG, vol 68 n° 3 (October 2009)

Public [article]  inBulletin of geodesy and geomatics BGG > vol 68 n° 3 (October 2009) . - pp 255 - 267 Titre : ETRS89 realization: current status, ETRF2005 and future development Type de document : Article/Communication Auteurs : Zuheir Altamimi , Auteur Année de publication : 2009 Article en page(s) : pp 255 - 267 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux [Termes IGN] European Terrestrial Reference Frame [Termes IGN] European Terrestrial Reference System 1989 [Termes IGN] International Terrestrial Reference System Résumé : (Auteur) The European Terrestrial Reference System 1989 (ETRS89) was defined and adopted by EUREF in 1990 and since then is largely used by most of European countries as the basis of their national geodetic system. This paper re-discusses the ETRS89 definition, its mathematical link to the International Terrestrial Reference System (ITRS), focuses on the main ways allowing its realization and raises the awareness of possible misinterpretation of its definition and in particular the misuse of the epoch 1989.0 inherent in its definition. Some numerical examples are provided in order to illustrate the discussion. Particular focus is given to the ETRF2005 and its consequences in terms of frame shifts (origin, scale and orientation) as well as consequent station coordinate changes with respect to ETRF2000. Nonetheless, a mathematically sound alternative of the ETRS89 realization is also proposed, leading to frame definition changes due to the well known estimation process, while perfectly satisfying the ETRS89 definition. Given the fact that the ETRS89 is designed primarily for practical geo-referencing applications where these frame shifts are not desired, it is therefore recommended to adopt the ETRF2000 as the basic frame of the ETRS89 realization for future adoption by the European National Mapping Agencies. Procedure how to access the ETRF2000 frame from any ITRF version is described. Numéro de notice : A2009-567 Affiliation des auteurs : IGN (1940-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueNat DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=77994 [article]

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Final results of the Italian "Rete Dinamica Nazionale" (RDN) of Istituto Geografico Militare Italiano (IGMI) and its alignment to ETRF2000 / L. Baroni in Bulletin of geodesy and geomatics BGG, vol 68 n° 3 (October 2009)

Public [article]  inBulletin of geodesy and geomatics BGG > vol 68 n° 3 (October 2009) . - pp 289 - 315 Titre : Final results of the Italian "Rete Dinamica Nazionale" (RDN) of Istituto Geografico Militare Italiano (IGMI) and its alignment to ETRF2000 Type de document : Article/Communication Auteurs : L. Baroni, Auteur ; F. Cauli, Auteur ; G. Faroli, Auteur ; R. Maseroli, Auteur Année de publication : 2009 Article en page(s) : pp 289 - 315 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux [Termes IGN] European Terrestrial Reference System 1989 [Termes IGN] IGM95 [Termes IGN] Italie [Termes IGN] réseau géodésique local [Termes IGN] réseau géodésique permanent [Termes IGN] Rete Dinamica Nazionale [Termes IGN] station GPS Résumé : (Auteur) We present the general aspects, the main features and the final results of the Rete Dinamica Nazionale (RDN), the new geodetic reference frame system for Italy adopted from January 1th 2009. RDN which means National Dynamic Network is aligned to the most recent official realization of ETRS89, ETRF2000 at the epoch 2008.0. It will update the previous Italian realisation of ETRS89, materialized with the IGM95 frame. RDN consists of a network of 99 GPS permanent stations aligned to 13 IGS fiducial stations included in the ITRF2005 solution. The other stations were selected taking into account the homogeneous spatial distribution and the quality of location and equipment. The observation campaign lasts 28 days, from 23th December 2007 to 19th January 2008 and the data are daily files in RINEX format with 30 seconds sample rate. The computation was performed by the Data Processing Centre of the Geodetic Service of Istituto Geografico Militare Italiano (IGMI) and the processing strategy followed the standard procedures adopted by EUREF guidelines. The same computation also was performed independently by University of Padova (prof. Caporali) and by the G3 group in Milano (prof. Sanso) in order to test the results. In this article, we show all the processing steps until the final results and then all the comparisons with other data centers. Numéro de notice : A2009-569 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=77996 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
013-09031	RAB	Revue	Centre de documentation	En réserve L003	Disponible