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contenu dans Geodetic Reference Frames, IAG Symposium Munich, Germany, 9-14 October 2006 / Hermann Drewes (2009)
Titre : Strengthes and limitations of the ITRF: ITRF2005 and beyond Type de document : Article/Communication Auteurs : Zuheir Altamimi , Auteur ; Xavier Collilieux , Auteur ; Claude Boucher , Auteur Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2009 Collection : International Association of Geodesy Symposia, ISSN 0939-9585 num. 134 Conférence : IAG 2006, Symposium Geodetic Reference Frames 09/10/2006 14/10/2006 Munich Allemagne Proceedings Springer Importance : pp 73 - 79 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] International Terrestrial Reference System
[Termes IGN] système de référence mondialRésumé : (auteur) As the International Terrestrial Reference Frame (ITRF) is constructed by combination of space geodesy technique solutions together with terrestrial local ties in co-location sites, it then inherits strengths and weaknesses of the combined data. This paper uses the ITRF2005 results in order to illustrate the critical aspects of the combination that impact the ITRF datum definition: the origin, the scale and the No Net Rotation condition. The main ITRF2005 results, using as input data time series of station positions, indicate a drift of 1.8 mm/yr in the origin Z-translation component with respect to ITRF2000, while SLR solutions are used to define the origins of both frames. A scale bias of about 1 ppb between VLBI and SLR solutions is also detected. Possible causes of this inconsistency include the poor SLR and VLBI networks and their co-locations, systematic errors and possible inconsistent model corrections used in the data analysis of both techniques. As conclusion of this paper, some recommendations for improvements of future ITRF solutions are addressed. Numéro de notice : C2006-021 Affiliation des auteurs : LAREG+Ext (1991-2011) Thématique : POSITIONNEMENT Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1007/978-3-642-00860-3_11 Date de publication en ligne : 02/06/2009 En ligne : https://doi.org/10.1007/978-3-642-00860-3_11 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=90684
contenu dans Geodetic Reference Frames, IAG Symposium Munich, Germany, 9-14 October 2006 / Hermann Drewes (2009)
Titre : The European Reference Frame: maintenance and products Type de document : Article/Communication Auteurs : Carine Bruyninx, Auteur ; Zuheir Altamimi , Auteur ; Claude Boucher , Auteur ; Elmar Brockmann, Auteur ; Alessandro Caporali, Auteur ; Werner Gurtner, Auteur ; H. Habrich, Auteur ; Helmut Hornik, Auteur ; et al., Auteur Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2009 Collection : International Association of Geodesy Symposia, ISSN 0939-9585 num. 134 Conférence : IAG 2006, Symposium Geodetic Reference Frames 09/10/2006 14/10/2006 Munich Allemagne Proceedings Springer Importance : pp 131 - 136 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] EUREF
[Termes IGN] European Terrestrial Reference FrameRésumé : (auteur) EUREF, the IAG (International Association of Geodesy) Reference Frame Sub-commission for Europe, deals with the definition, realization and maintenance of the European Reference Frame. EUREF works in close cooperation with the pertinent IAG components and EuroGeographics, the consortium of the NMCA (National Mapping and Cadastre Agencies) in Europe.
This paper presents an overview of EUREF and describes its missions, activities and the recent developments, aiming at upgrading European-wide geodetic reference systems to support both scientific and continental geo-referencing activities.Numéro de notice : C2006-023 Affiliation des auteurs : LAREG+Ext (1991-2011) Thématique : POSITIONNEMENT Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1007/978-3-642-00860-3_20 Date de publication en ligne : 02/06/2009 En ligne : https://doi.org/10.1007/978-3-642-00860-3_20 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=90687
contenu dans Geodetic Reference Frames, IAG Symposium Munich, Germany, 9-14 October 2006 / Hermann Drewes (2009)
Titre : The International Terrestrial Reference Frame (ITRF2005) Type de document : Article/Communication Auteurs : Zuheir Altamimi , Auteur Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2009 Collection : International Association of Geodesy Symposia, ISSN 0939-9585 num. 134 Conférence : IAG 2006, Symposium Geodetic Reference Frames 09/10/2006 14/10/2006 Munich Allemagne Proceedings Springer Importance : pp 81 - 82 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] International Terrestrial Reference FrameRésumé : (auteur) The International Terrestrial Reference Frame (ITRF) is intended to be the standard reference for all geodetic and Earth science applications, ranging from national geodetic datums to Earth rotation, satellite navigation and geophysical interpretation of crustal deformation and tectonic plate motion. The ITRF is under the responsibility of the International Earth Rotation and Reference Systems Service (IERS). It is constructed upon combination of station positions and velocities of geodetic markers and instrument reference points, as determined by space geodesy techniques such as VLBI, SLR, GPS and DORIS. Since the creation of the IERS in 1988, more than 10 versions of the ITRF were determined, the up to date version is being the ITRF2005. Unlike the previous ITRF versions, the ITRF2005 is based on input data under the form of time series (weekly for satellite techniques, and daily for VLBI) of station positions and daily Earth Orientation Parameters (EOPs). This short paper briefly summarizes the contribution to the ITRF of the international technique services, the ITRF history and ITRF2005 main results. It also provides the reader a selected list of a certain number of publications related to the ITRF and ITRF2005 in particular. Numéro de notice : C2006-022 Affiliation des auteurs : LAREG (1991-2011) Thématique : POSITIONNEMENT Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1007/978-3-642-00860-3_12 Date de publication en ligne : 02/06/2009 En ligne : https://doi.org/10.1007/978-3-642-00860-3_12 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=90686
Titre : Accuracy assessment of the ITRF datum definition Type de document : Article/Communication Auteurs : Zuheir Altamimi , Auteur ; Xavier Collilieux , Auteur ; Claude Boucher , Auteur Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2008 Collection : International Association of Geodesy Symposia, ISSN 0939-9585 num. 132 Conférence : IAG 2006, 6th Hotine-Marussi symposium on theoretical and computational geodesy 29/05/2006 02/06/2006 Wuhan Chine Proceedings Springer Importance : pp 101 - 110 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] précision du positionnementRésumé : (auteur) One of the main objectives of the International Terrestrial Reference Frame (ITRF) is to provide a standard global reference frame having the most attainable accuracy of its datum definition in terms of its origin, scale and the time evolution of its orientation. This latter should satisfy, by convention, the no net rotation condition. The accuracy of the ITRF datum specifications are obviously dependent on the quality and the internal consistency of the solutions contributing to its elaboration and definition. In this paper, we examine and review the quality of the current ITRF datum definition with an accuracy assessment based on the ITRF2005 results and by consistency evaluation with respect to ITRF2000. The availability of time series of station positions and Earth Orientation Parameters, used now as input for the current ITRF construction, will facilitate the accuracy assessment. When rigorously stacking the time series of a given technique to estimate a long-term frame solution, the 7 transformation parameters of each individual temporal set of station positions are also estimated. By applying dynamically internal constraints (equivalent to minimum constraints approach) over the time series of the 7 parameters, we then preserve some physical “natural” parameters as for instance the scale and the origin from VLBI and SLR, respectively. Our conservative evaluation of the estimated accuracy of the ITRF datum definition is that the origin and its rate are accurate at the level of 5 mm and 2 mm/yr, the scale and its rate are at the level of 1 part per billion (ppb) and 0.1 ppb/yr and the No-Net-Rotation condition implementation is at the level of 2 mm/yr. Numéro de notice : C2006-037 Affiliation des auteurs : LAREG (1991-2011) Thématique : POSITIONNEMENT Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1007/978-3-540-74584-6_16 En ligne : https://doi.org/10.1007/978-3-540-74584-6_16 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=102736
Titre : Fine analysis of lever arm effects in moving gravimetry Type de document : Article/Communication Auteurs : Bertrand de Saint-Jean , Auteur ; Jérome Verdun , Auteur ; Henri Duquenne (1948-2010) , Auteur ; Jean-Pierre Barriot, Auteur ; Stavros A. Melachroinos, Auteur ; José Cali, Auteur Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2006 Collection : International Association of Geodesy Symposia, ISSN 0939-9585 num. 130 Conférence : IAG 2005, IAG Symposium IAG conference Dynamic Planet - Monitoring and Understanding a Dynamic Planet with Geodetic and Oceanographic Tools 22/08/2005 26/08/2005 Cairns Australie Proceedings Springer Importance : pp 809 - 816 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] accéléromètre
[Termes IGN] analyse de sensibilité
[Termes IGN] gravimètre
[Termes IGN] précision du positionnementRésumé : (auteur) A moving inertial gravimetric system is now being developed, consisting of three high precision accelerometers measuring accelerations along three non-parallel axes. The system has been designed to make high resolution gravity measurements on motor vehicles, ships or aircraft at mGal level of precision. Position, velocity and attitude of the platform, needed for computing acceleration corrections, are provided by a 4-antenna GPS system rigidly mounted on the platform with a sampling rate of 1 or 2 Hz. Because acceleration and GPS measurements are not made at the same point, the signals derived from the accelerometers have to be corrected for lever arm effect. To this end, we derived the complete relationship connecting accelerometer and GPS measurements. The correction for the lever arm effect requires the computation of seven acceleration terms. The amplitude of the lever arm effect depends not only on the lever arm length, but also on the platform attitude. Our own findings based on both simulations and real measurements suggest that some of the seven lever arm terms have to be considered to reach a few mGals precision for gravity. We present a reliable method to assess the precision that can be achieved for lever arm effect determination given the precision of attitude and lever arm measurements. Numéro de notice : C2005-046 Affiliation des auteurs : LAREG+Ext (1991-2011) Thématique : POSITIONNEMENT Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1007/978-3-540-49350-1_115 En ligne : https://doi.org/10.1007/978-3-540-49350-1_115 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=102735 PermalinkLong term consistency of multi-technique terrestrial reference frames, a spectral approach / Karine Le Bail (2006)PermalinkLooking for systematic error in scale from Terrestrial Reference Frames derived from DORIS data / Pascal Willis (2006)PermalinkPermalinkPermalinkGravity, geoid and space missions GGSM 2004, IAG international symposium, Porto, Portugal, August 30 - September 3, 2004 / Christopher Jekeli (2005)PermalinkPermalinkPermalinkPermalinkMerging a gravimetric model of the geoid with GPS-leveling data: an example in Belgium / Henri Duquenne (01/08/2004)Permalink