Détail de l'autorité
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IAG 2007, International Association of Geodesy General Assembly Perugia Italie Proceedings Springer
nom du congrès :
IAG 2007, International Association of Geodesy General Assembly
ville du congrès :
Perugia
pays du congrès :
Italie
site des actes du congrès :
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Documents disponibles (3)
Ajouter le résultat dans votre panier Affiner la recherche Interroger des sources externesImpact of the network effect on the origin and scale: case study of Satellite Laser Ranging / Xavier Collilieux (2009)
Titre : Impact of the network effect on the origin and scale: case study of Satellite Laser Ranging Type de document : Article/Communication Auteurs : Xavier Collilieux Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2009 Collection : International Association of Geodesy Symposia, ISSN 0939-9585 num. 133 Conférence : IAG 2007, International Association of Geodesy General Assembly Perugia Italie Proceedings Springer Importance : pp 31 - 37 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] analyse de sensibilité
[Termes IGN] données GPS
[Termes IGN] données TLS (télémétrie)
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] mouvement du géocentre
[Termes IGN] repère de référence
[Termes IGN] station permanente
[Termes IGN] transformation de HelmertRésumé : (auteur) The study of station non linear motions requires being able to discriminate between the local motion of every station and their global motion (e.g. geocenter motion). A common used approach consists in estimating Helmert parameters with respect to a secular reference frame. But if the network is small or not well distributed, the global parameters, and mainly the translation and scale parameters, will not be rigorously decorrelated from the station displacements. The distribution of the currently operating Satellite Laser Ranging (SLR) stations is one example of such a network. The understanding of the network effect needs an analysis of the station distribution over time. It appears that SLR station distribution on the X positive hemisphere of the Earth varies seasonally. We suggest here that using GPS results to constrain the estimation of SLR station displacements may improve the estimation of the Helmert parameters. These additional constraints as well as stochastic constraints are numerically tested here in a first attempt to limit the impact of the network effect. We show that the X component of the translation and the scale are the two parameters that are the most sensitive to any change in the configuration of the added constraints. Numéro de notice : C2009-027 Affiliation des auteurs : LAREG (1991-2011) Thématique : POSITIONNEMENT Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1007/978-3-540-85426-5_4 En ligne : https://doi.org/10.1007/978-3-540-85426-5_4 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=90615
Titre : Satellite Laser Ranging biases and terrestrial reference frame scale factor Type de document : Article/Communication Auteurs : David Coulot Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2009 Collection : International Association of Geodesy Symposia, ISSN 0939-9585 num. 133 Conférence : IAG 2007, International Association of Geodesy General Assembly Perugia Italie Proceedings Springer Importance : pp 39 - 46 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] données TLS (télémétrie)
[Termes IGN] erreur systématique
[Termes IGN] facteur d'échelle
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] repère de référenceRésumé : (auteur) We examine the impact of the strategy adopted regarding range biases on Satellite Laser Ranging data processing results. More especially, we test the stability of the weekly Terrestrial Reference Frame scale factors computed w.r.t. ITRF2000 according to the two different strategies which are studied in this paper. In the first approach, range biases are not considered in the data processing. In the second approach, we use a temporal de-correlation method to rigorously estimate all station range biases. The first approach provides weekly scale factors with a piece-wise behavior. More precisely, the time series exhibit a drift of − 2.5 ± 0.2 mm/yr between 2001.0 and 2006.0 and provide a RMS of 5.2 mm. The second approach, which makes the most physical sense, really provides regular weekly scale factors. Indeed, between 2001.0 and 2006.0, these series exhibit a drift of − 0.7 ± 0.2 mm/yr and the RMS of the whole time series is 3.7 mm. Moreover, less discontinuities are detected in the station position residual time series provided by the second approach than in those produced with the first approach. Numéro de notice : C2009-029 Affiliation des auteurs : LAREG+Ext (1991-2011) Thématique : POSITIONNEMENT Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1007/978-3-540-85426-5_5 En ligne : https://doi.org/10.1007/978-3-540-85426-5_5 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=90692
Titre : Status of the European Reference Frame (EUREF) Type de document : Article/Communication Auteurs : Joao Agria Torres, Auteur ; Zuheir Altamimi Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2009 Collection : International Association of Geodesy Symposia, ISSN 0939-9585 num. 133 Conférence : IAG 2007, International Association of Geodesy General Assembly Perugia Italie Proceedings Springer Importance : pp 47 - 56 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] EUREF
[Termes IGN] repère de référence
[Termes IGN] réseau permanent EUREFRésumé : (auteur) EUREF (www.euref.eu) is the IAG (International Association of Geodesy) Reference Frame Sub-commission for Europe integrated in Sub-Commission 1.3 – Regional Reference Frames, of Commission 1 – Reference Frames, of the IAG. The activities carried out by EUREF are related to the definition, realization and maintenance of the European Reference Frame. EUREF focuses on both the geo-spatial and the vertical components and has the participation of almost all the European countries. This paper presents an overview of the status and recent developments of EUREF core projects, which are aimed at upgrading European-wide geodetic reference systems to support both scientific and continental geo-referencing activities. Numéro de notice : C2009-030 Affiliation des auteurs : LAREG+Ext (1991-2011) Thématique : POSITIONNEMENT Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1007/978-3-540-85426-5_6 En ligne : https://doi.org/10.1007/978-3-540-85426-5_6 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=90693
