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Devising stable geometrical reference frames for use in geodetic studies of vertical crustal motion / Michael Bevis in Journal of geodesy, vol 87 n° 4 (April 2013)
[article]
Titre : Devising stable geometrical reference frames for use in geodetic studies of vertical crustal motion Type de document : Article/Communication Auteurs : Michael Bevis, Auteur ; Abel Brown, Auteur ; Eric Kendrick, Auteur Année de publication : 2013 Article en page(s) : pp 311 - 321 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] déformation verticale de la croute terrestre
[Termes IGN] positionnement par GPS
[Termes IGN] repère de référenceRésumé : (Auteur) We present a method for constructing and assessing the stability of a geometrical reference frame for use in vertical crustal motion studies. Our approach exploits the fact that when we transform GPS velocity solutions from one reference frame (RF) to another one using a Helmert transformation, only the frame translation rate parameters produce significant changes in the vertical station velocities expressed in the final RF. Loosely speaking, one can select and impose a ‘vertical RF’ from an ensemble of candidate frames, without any reference to the ‘horizontal RF’ (which can be selected and imposed afterwards), by seeing how the frame translation rates vary as one moves across the ensemble of frames. We order this ensemble according to the number of stations, N, incorporated into the set VREF whose RMS vertical motion is minimized in order to realize each frame. The value of N controls the level of scatter in, and hence the degree of similarity between the vertical velocities of the stations composing VREF. We characterize a specific vertical RF as stable if all of the frames located in a large neighborhood of the ensemble which includes the specific frame are characterized by very small relative frame translation rates. In this case, the expression of vertical GPS station velocities in any of these frames would lead to very similar results. We present a case study using a very large global time series in which we find a large RF neighborhood in which vertical station velocities are globally stable at the ? 0.2 mm/year level, and a slightly smaller neighborhood in which vertical stability improves to ? 0.1 mm/year level in polar regions. Numéro de notice : A2013-216 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-012-0600-5 Date de publication en ligne : 03/11/2012 En ligne : https://doi.org/10.1007/s00190-012-0600-5 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32354
in Journal of geodesy > vol 87 n° 4 (April 2013) . - pp 311 - 321[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 266-2013041 SL Revue Centre de documentation Revues en salle Disponible Directional relations and frames of reference / Eliseo Clementini in Geoinformatica, vol 17 n° 2 (April 2013)
[article]
Titre : Directional relations and frames of reference Type de document : Article/Communication Auteurs : Eliseo Clementini, Auteur Année de publication : 2013 Article en page(s) : pp 235 - 255 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique
[Termes IGN] langage de requête
[Termes IGN] navigation terrestre
[Termes IGN] prise en compte du contexte
[Termes IGN] réflectance de surface
[Termes IGN] relation spatiale
[Termes IGN] repère de référence
[Termes IGN] taxinomieRésumé : (Auteur) As an intermediate category between metric and topology, directional relations are as much varied as “right of”, “before”, “between”, “in front of”, “back”, “north of”, “east of”, and so on. Directional relations are ambiguous if taken alone without the contextual information described by frames of reference. In this paper, we identify a unifying framework for directional relations and frames of reference, which shows how a directional relation with its associated frame of reference can be mapped to a projective relation of the 5-intersection model. We discuss how this knowledge can be integrated in spatial query languages. Numéro de notice : A2013-158 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s10707-011-0147-2 Date de publication en ligne : 24/11/2011 En ligne : https://doi.org/10.1007/s10707-011-0147-2 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32296
in Geoinformatica > vol 17 n° 2 (April 2013) . - pp 235 - 255[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 057-2013021 RAB Revue Centre de documentation En réserve L003 Disponible
contenu dans Reference frames for applications in geosciences, Proceedings of IAG Symposium REFAG 2010 / Zuheir Altamimi (2013)
Titre : Dependence of IGS products on the ITRF datum Type de document : Article/Communication Auteurs : Jim Ray, Auteur ; Paul Rebischung , Auteur ; Ralf Schmid, Auteur Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2013 Collection : International Association of Geodesy Symposia, ISSN 0939-9585 num. 138 Conférence : REFAG 2010, Reference Frames for Applications in Geosciences, IAG symposium 04/10/2010 08/10/2010 Champs-sur-Marne France Proceedings Springer Importance : pp 63 - 67 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] antenne GNSS
[Termes IGN] étalonnage d'instrument
[Termes IGN] International GNSS Service
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] repère de référenceRésumé : (Auteur) Throughout its nearly two decades, the International GNSS (Global Navigation Satellite Systems) Service (IGS) has sought to align its products closely to successive realizations of the International Terrestrial Reference Frame (ITRF). This has been disruptive for IGS users at times, especially during the 1990s when some radical ITRF datum choices were adopted. During the past decade, IGS impacts due to ITRF updates have been smaller and mostly caused by errors in the results from the contributing space geodetic techniques. Frame orientations (rotations) are purely conventional, so the IGS relies on the ITRF via a subset of reliable, globally distributed stations. Except for the period when ITRF93 was used, this procedure has worked well. The IGS origin in principle could be self-reliant or contributory to ITRF by direct observation of a frame origin aligned to the long-term center of mass of the entire Earth system. In practice, however, GNSS-based results have been less reliable than those from satellite laser ranging (SLR). So the ITRF origin, based on SLR only, has been adopted historically. Until the transition from ITRF2005 to ITRF2008, there have sometimes been significant origin shifts as SLR results have evolved. However, the present stability of the ITRF origin may finally have reached the few-mm level. In many respects, the IGS dependence on the ITRF scale is most subtle and problematic. In addition to an overall Helmert alignment of the IGS frame to match the ITRF scale (and other datum parameters), since 2006 the IGS calibration values for the GNSS satellite antenna z-offsets depend directly on the same ITRF scale (due to high correlations if the IGS frame scale is not fixed). We therefore face a non-linear situation to maintain full consistency between all IGS products and the ITRF scale: each IGS frame contribution to ITRF based on one set of antenna calibrations must be used, together with frames from other techniques, to determine an updated ITRF and new antenna calibrations, which are then no longer strictly consistent with the starting IGS frame. One can hope that the process will iteratively converge eventually. But large shifts in the ITRF scale, such as the -1 ppb change from ITRF2005 to ITRF2008, are highly disturbing, much more so than the associated rotational or translational shifts. Numéro de notice : C2010-012 Affiliation des auteurs : LAREG+Ext (1991-2011) Thématique : POSITIONNEMENT Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1007/978-3-642-32998-2_11 Date de publication en ligne : 27/11/2012 En ligne : http://dx.doi.org/10.1007/978-3-642-32998-2_11 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=65067 External evaluation of the origin and scale of the international terrestrial reference frame / Xavier Collilieux (2013)
contenu dans Reference frames for applications in geosciences, Proceedings of IAG Symposium REFAG 2010 / Zuheir Altamimi (2013)
Titre : External evaluation of the origin and scale of the international terrestrial reference frame Type de document : Article/Communication Auteurs : Xavier Collilieux , Auteur ; Zuheir Altamimi , Auteur Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2013 Collection : International Association of Geodesy Symposia, ISSN 0939-9585 num. 138 Conférence : REFAG 2010, Reference Frames for Applications in Geosciences, IAG symposium 04/10/2010 08/10/2010 Champs-sur-Marne France Proceedings Springer Importance : pp 27 - 31 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] repère de référence
[Termes IGN] système de référence mondialRésumé : (Auteur) The International Terrestrial Reference Frame (ITRF) datum definition is of primary importance for many Earth Science Applications. While accurate origin information (Earth Center of Mass) is required for any precise satellite orbit determination, an accurate scale is indispensable for various calibrations (altimeter absolute bias, GNSS satellite antenna phase center offsets). Studies involving vertical motion determination, such as mean sea level and Glacial Isostatic Adjustment (GIA) are also affected by the choice of the underlying Terrestrial Reference Frame. ITRF datum accuracy evaluation has been tradi-tionally performed by comparing independent space geodetic technique performances and successive ITRF solutions. While the ITRF2005 to ITRF2000 comparison may lead to pessimistic evaluation of the ITRF datum accuracy, the question is raised whether the error budget deduced from the ITRF2008 to ITRF2005 comparison would be optimistic, espe-cially for the time evolution of the origin. It is fundamental to explore external ways to evaluate the ITRF frame parameters and especially their time evolution which impacts the results of many climatic studies. The state of art of available methods is reviewed by stressing their advantages and drawbacks. Most of them have been already implemented and show that the ITRF2005 origin rate is probably reliable at the millimeter per year level. However these methods have been applied on different velocity field with different models and required assumptions which make their mutual comparison difficult. Thus, new analyses are required in the future. Numéro de notice : C2010-011 Affiliation des auteurs : LAREG (1991-2011) Thématique : POSITIONNEMENT Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1007/978-3-642-32998-2_5 Date de publication en ligne : 27/11/2012 En ligne : https://doi.org/10.1007/978-3-642-32998-2_5 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=65066 IGS International GNSS Service technical report 2012, ch. IGS Reference Frame Working Group Coordinator Report 2012 / Paul Rebischung (2013)
Titre de série : IGS International GNSS Service technical report 2012, ch Titre : IGS Reference Frame Working Group Coordinator Report 2012 Type de document : Chapitre/Contribution Auteurs : Paul Rebischung , Auteur ; Bruno Garayt , Auteur ; Xavier Collilieux , Auteur ; Zuheir Altamimi , Auteur Editeur : Bern : Astronomical Institute Année de publication : 2013 Collection : IGS International GNSS Service technical report num. 2012 Importance : pp 171 - 178 Format : 21 x 30 cm Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] repère de référenceNuméro de notice : 17125 Affiliation des auteurs : LASTIG LAREG (2012-mi2018) Thématique : POSITIONNEMENT Nature : Chapître / contribution nature-HAL : ChRapp DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80162 Documents numériques
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IGS Reference Frame Working Group Coordinator Report 2012Adobe Acrobat PDF ITRF combination : Theoretical and practical considerations and lessons from ITRF2008 / Zuheir Altamimi (2013)PermalinkBasic equations for constructing geopotential models from the gravitational potential derivatives of the first and second orders in the terrestrial reference frame / M. Petrovskaya in Journal of geodesy, vol 86 n° 7 (July 2012)PermalinkApplication des algorithmes génétiques à la recherche de sous-réseaux de stations de télémétrie laser / David Coulot in Bulletin d'information scientifique et technique de l'IGN, n° 77 (avril 2011)PermalinkPermalinkPermalinkConstruction of spherical harmonic series for the potential derivatives of arbitrary orders in the geocentric Earth-fixed reference frame / M. Petrovskaya in Journal of geodesy, vol 84 n° 3 (March 2010)PermalinkEtude des erreurs systématiques liées à la détermination du géocentre par les mesures DORIS / Marie-Line Gobinddass (2010)PermalinkPermalinkUnderstanding sea-level rise and variability / J.A. Church (2010)PermalinkThe kinematics of Ny-Ålesund from space geodetic data / Halfdan Pascal Kierulf in Journal of geodynamics, vol 48 n° 1 (July 2009)Permalink