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Relationship and transformation between the International and the European Terrestrial Reference Systems / Zuheir Altamimi (2017) 

Public Titre : Relationship and transformation between the International and the European Terrestrial Reference Systems Type de document : Rapport Auteurs : Zuheir Altamimi , Auteur Editeur : [s.l.] : [s.n.] Année de publication : 2017 Collection : EUREF Technical Notes num. 1 Importance : 12 p. Format : 30 x 21 cm 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 Frame [Termes IGN] International Terrestrial Reference System Résumé : (auteur) [introduction] The European Terrestrial Reference System 89 (ETRS89) was adopted in 1990 in Firenze,Italy, following the EUREF Resolution 1 that states: "The IAG Subcommision for the Euro-pean Reference Frame recommends that the system to be adopted by EUREF will be coinci-dent with the ITRS at the epoch 1989.0 and fixed to the stable part of the Eurasian Plate andwill be known as European Terrestrial Reference System 89 (ETRS89)".Following this resolution, a detailed description of ETRS89 and its relationship with theInternational Terrestrial Reference System (ITRS), including transformation formula werepublished in Boucher and Altamimi (1992).The purpose of this Technical Note is to (1) recall the mathematical relationship link-ing ETRS89 to the ITRS, (2) provide the users with all the necessary information allowingto transform station positions and velocities from any ITRSrealization to any ETRS89 re-alization, designated hereafter by ITRFyyand ETRFyy, respectively, and (3) recommend aprocedure to follow when realizing the ETRS89 at the national or regional level using GNSSdata and the International GNSS Service (IGS) products. This Technical Note summarizesand replaces the old memo of Boucher and Altamimi that was first published in September20, 1993 and last updated in May 18, 2011. Numéro de notice : 17570 Affiliation des auteurs : LASTIG LAREG (2012-mi2018) Thématique : POSITIONNEMENT Nature : Rapport d'étude technique nature-HAL : RappRech DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=91959

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The open data HELI-DEM DTM for the western alpine area: computation and publication / L. Biagi in Applied geomatics, vol 8 n° 3-4 (December 2016)  

Public [article]  inApplied geomatics > vol 8 n° 3-4 (December 2016) . - pp 191 - 200 Titre : The open data HELI-DEM DTM for the western alpine area: computation and publication Type de document : Article/Communication Auteurs : L. Biagi, Auteur ; S. Caldera, Auteur ; L. Carcano, Auteur ; Marco Negretti, Auteur Année de publication : 2016 Article en page(s) : pp 191 - 200 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] Alpes [Termes IGN] données altimétriques [Termes IGN] données lidar [Termes IGN] données localisées 3D [Termes IGN] European Terrestrial Reference Frame [Termes IGN] fusion de données [Termes IGN] Italie [Termes IGN] modèle numérique de surface [Termes IGN] Suisse [Termes IGN] transformation rapide de Fourier Résumé : (Auteur) Two problems can arise in analyzing Digital Elevation Models (DEMs). Firstly, one interest region could be patched by several partly overlapping models that present similar accuracies and spatial resolutions; they should be merged in one unified model. Moreover, even when the interest region is completely covered by one model, local data with better accuracy could cover partial areas and should be properly merged. All these problems have been addressed within Helvetia-Italy Digital Elevation Model, a project funded by the European Regional Development Fund (ERDF). One specific aim of the project was the creation and the publication of a unified DEM for a part of the Alps between Italy and Switzerland. The interest area is prevalently mountainous, with elevations that range from about 200 to 4600 m. Various elevation datasets were available that were gridded with different spatial resolutions, in different reference frames and coordinates. Moreover, one high resolution LiDAR model was available for some areas. Firstly, a validation was performed that allowed the identification of few blunders and confirmed the general accuracy of the input data. Two DEMs have been produced. Both of them cover the whole project area (boundaries λ = 7.80° East and λ = 10.70° East, φ = 45.10° North and φ = 46.70° North) and are gridded in ETRF2000 geographical coordinates, with a spatial resolution of 2 × 10−4 degrees. The former (named HD-1) has been obtained by interpolating and merging all the low resolution models on a new common grid. HD-1 has been locally corrected by the LiDAR model, where it was available; to avoid sharp discontinuities, the corrections have been filtered by Fast Fourier Transform before applying them. The resulting model has been called HD-2. HD-1 and HD-2 are published by an open access geoservice. Numéro de notice : A2016--054 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1007/s12518-016-0176-5 Date de publication en ligne : 26/10/2016 En ligne : http://dx.doi.org/10.1007/s12518-016-0176-5 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=84201 [article]

Verification of the polish geodetic reference frame by means of a new solution based on permanent GNSS data from the years 2011-2014 / Tomasz Liwosz in Reports on geodesy and geoinformatics, vol 102 n° 1 (December 2016)  

Public [article]  inReports on geodesy and geoinformatics > vol 102 n° 1 (December 2016) . - pp 52 - 66 Titre : Verification of the polish geodetic reference frame by means of a new solution based on permanent GNSS data from the years 2011-2014 Type de document : Article/Communication Auteurs : Tomasz Liwosz, Auteur ; M. Ryczywolski, Auteur Année de publication : 2016 Article en page(s) : pp 52 - 66 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux [Termes IGN] Bernese [Termes IGN] coordonnées GNSS [Termes IGN] European Terrestrial Reference Frame [Termes IGN] Pologne [Termes IGN] repère de référence [Termes IGN] réseau de premier ordre [Termes IGN] station permanente Résumé : (Auteur) The new solution for the Polish geodetic primary GNSS network was created to verify the currently used reference frame (PL-ETRF2000). The new solution is based on more GNSS data (more daily observation sessions included, a longer data timespan, GLONASS observations added) which were processed in a newer reference frame (IGb08) according to up-to-date methodology and using the latest version of Bernese GNSS Software. The new long-term solution (spanning 3.7 years) was aligned to the IGb08 reference frame using a minimum constraints approach. We categorized Polish reference stations into two categories according to their data length. We obtained good agreement of the new solution with the PL-ETRF2000: for most stations position differences did not exceed 5 mm in horizontal, and 10 mm in vertical components. However, for 30 stations we observed discontinuities in position time series, mostly due to GNSS equipment changes, which occured after the introduction of PL-ETRF2000. Position changes due to the discontinuities reached 9.1 mm in horizontal components, and 26.9 mm in vertical components. The new solution takes into account position discontinuities, and in addition also includes six new stations which were installed after the introduction of the PL-ETRF2000. Therefore, we propose to update the currently-used reference frame for the Polish geodetic primary network (PL-ETRF2000) with the new solution. The new solution was also accepted by the EUREF Technical Working Group as a class A solution (highest accuracy) according to EUREF standards. Numéro de notice : A2017-302 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1515/rgg-2016-0027 En ligne : https://doi.org/10.1515/rgg-2016-0027 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=85337 [article]

Comparison of regional and global GNSS positions, velocities and residual time series / Juliette Legrand (2012)  

Public Titre : Comparison of regional and global GNSS positions, velocities and residual time series Type de document : Article/Communication Auteurs : Juliette Legrand, Auteur ; Nicolas Bergeot, Auteur ; Carine Bruyninx, Auteur ; Guy Wöppelmann , Auteur ; Alvaro Santamaria Gomez, Auteur ; Marie-Noëlle Bouin , Auteur ; Zuheir Altamimi , Auteur Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2012 Collection : International Association of Geodesy Symposia, ISSN 0939-9585 num. 136 Conférence : IAG 2009 Symposium, Geodesy for Planet Earth 31/08/2009 04/09/2009 Buenos Aires Argentine Proceedings Springer Importance : pp 95 - 103 Format : 16 x 24 cm Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux [Termes IGN] European Terrestrial Reference Frame [Termes IGN] International Terrestrial Reference Frame [Termes IGN] résidu [Termes IGN] retard troposphérique zénithal [Termes IGN] série temporelle Résumé : (auteur) More than 10 years (1996–2008) of weekly GPS solutions of 299 globally distributed stations have been used to quantify the impact of the reference frame definition and especially the size of the network on the estimated station positions, velocities, and residual position time series. For that purpose, weekly regional solutions (covering the European region) and global solutions have been respectively stacked to obtain regional and global station positions, velocities, and residual position time series. In both cases, the estimated long-term solutions have been tied to the ITRF2005 under minimal constraints using a selected set of reference stations. This study shows that: (1) regional position and velocity solutions can present biases with respect to each other and to global solutions, while in comparison, global solutions are much more stable; (2) the obtained residual position time series are affected by the size of the network with significantly reduced periodic signals in the regional networks, e.g. a 27% reduction of the annual signals in the height component. Numéro de notice : C2009-063 Affiliation des auteurs : LAREG+Ext (1991-2011) Thématique : POSITIONNEMENT Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1007/978-3-642-20338-1_12 Date de publication en ligne : 26/07/2011 En ligne : https://doi.org/10.1007/978-3-642-20338-1_12 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=102021

GNSS precise point positioning in regional reference frames using real-time broadcast corrections / Lennard Huisman in Journal of applied geodesy, vol 6 n° 1 (January 2012)  

Public [article]  inJournal of applied geodesy > vol 6 n° 1 (January 2012) . - pp 15 - 23 Titre : GNSS precise point positioning in regional reference frames using real-time broadcast corrections Type de document : Article/Communication Auteurs : Lennard Huisman, Auteur ; Peter J.G. Teunissen, Auteur ; Congwei Hu, Auteur Année de publication : 2012 Article en page(s) : pp 15 - 23 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux [Termes IGN] Australie [Termes IGN] erreur systématique [Termes IGN] European Terrestrial Reference Frame [Termes IGN] International Terrestrial Reference Frame [Termes IGN] niveau local [Termes IGN] positionnement par GNSS [Termes IGN] positionnement ponctuel précis [Termes IGN] temps réel Résumé : (auteur) As a result of the Real-Time IGS Pilot Project (RT-IGS) and the EUREF Real-Time Analysis Project (EUREF-RT), real-time GNSS satellite orbit and clock corrections to broadcast ephemeris, the so-called real-time broadcast corrections (BC), have become available for the application in precise point positioning (PPP). The realtime BCs are currently available in global as well as in regional reference frames. In this contribution the PPP usage and performances of these global and regional BCs are analysed for the Australian continent. We identify the limitations of the current regional BCs, which results in scale-induced biases, and show how they can be improved. We also present an alternative, more user friendly, approach for regional BCs. It provides PPP users with simple means to correct for the biases of the regional approach. Numéro de notice : A2012-701 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1515/jag-2011-0006 Date de publication en ligne : 14/03/2012 En ligne : https://doi.org/10.1515/jag-2011-0006 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=77560 [article]

Monitoring of official national ETRF coordinates on EPN web project for the EUREF TWG [technical working group] / Elmar Brockmann in Bulletin of geodesy and geomatics BGG, vol 69 n° 2 - 3 (December 2010)

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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)

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ITRF2005 and Consequences for the ETRF 2005 / Zuheir Altamimi (2009)  

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The European Reference Frame: maintenance and products / Carine Bruyninx (2009)  

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Geomatics or geomagic ? Part 1 / D. Philip in Geomatic world, vol 16 n° 4 (01/05/2008)

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Report on the Symposium of the IAG Subcommission for Europe (EUREF) held in Riga, 14 - 17 June 2006 & reports of the EUREF technical working group, EUREF publication n° 16 / Joao Agria Torres (2006)

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Report on the symposium of the IAG Subcommission for Europe (EUREF) held in Vienna, 1 - 4 June 2005 & reports of the EUREF technical working group, EUREF publication n° 15 / Joao Agria Torres (2006)

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Report on the Symposium of the IAG Subcommission for Europe (EUREF) held in Bratislava, 2 - 5 June 2004 & reports of the EUREF technical working group, EUREF publication n° 14 / Joao Agria Torres (2005)

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National report of France at the EUREF Symposium, Bratislava, June 2-5, 2004 / Françoise Duquenne (30/06/2004)

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Report on the Symposium of the IAG Subcommission for Europe (EUREF) held in Toledo, 4 - 7 June 2003 & reports of the EUREF technical working group, EUREF publication n° 13 / Joao Agria Torres (2004)

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