Détail de l'auteur
Auteur Athanasios Dermanis |
Documents disponibles écrits par cet auteur (4)
Ajouter le résultat dans votre panier
Visionner les documents numériques
Affiner la recherche Interroger des sources externesExternal evaluation of the Terrestrial Reference Frame: report of the task force of the IAG sub-commission 1.2 / Xavier Collilieux (2014)
Titre : External evaluation of the Terrestrial Reference Frame: report of the task force of the IAG sub-commission 1.2 Type de document : Article/Communication Auteurs : Xavier Collilieux Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2014 Collection : International Association of Geodesy Symposia, ISSN 0939-9585 num. 139 Conférence : IAG 2011, General Assembly 28/06/2011 02/07/2011 Melbourne Australie Proceedings Springer Importance : pp 197 - 202 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] International Terrestrial Reference FrameRésumé : (auteur) Ideally, the origin of the Terrestrial Reference Frame (TRF) is defined as the center of mass of the whole Earth system, the time evolution of its orientation is such that no global net rotation of the whole Earth’s surface is possible and the TRF scale is specified through the adoption of some physical constants and time-scale. These parameters need to be accurately determined since their choice has an influence on many Earth’s science applications. The aim of the task force “External evaluation of the Terrestrial Reference Frame” is to review all the applications for which the TRF accuracy is of fundamental importance. As the TRF choice has an influence on the interpretation of the results in these specific applications, we investigate if some evaluation procedures could be established. We classified the methods that allow evaluation of the TRF using ground, geodetic data or models that have not been used in the TRF construction, based on their expected contributions. Some of these methods have been applied to the latest International Terrestrial Reference System realizations and the results are presented here. Although further analysis will be necessary to deliver a more precise error budget, our findings demonstrate that the most recent realizations of the ITRS are more accurate than the previous in terms of origin and scale rate definition. The current level of ITRF2008 accuracy is likely to be at the level of 0.5 mm/year along each origin component and better than 0.3 mm/year in the scale rate according to the most recent studies. Numéro de notice : C2011-026 Affiliation des auteurs : LASTIG LAREG+Ext (2012-mi2018) Thématique : POSITIONNEMENT Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1007/978-3-642-37222-3_25 Date de publication en ligne : 06/10/2013 En ligne : http://dx.doi.org/10.1007/978-3-642-37222-3_25 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=78509 On measurements of lands and constructions, Volume in honor of Prof. D. Vlachos. Theoretical foundations of ITRF determination. The algebraic and the kinematic approach / Zuheir Altamimi (2013)
Titre de série : On measurements of lands and constructions, Volume in honor of Prof. D. Vlachos Titre : Theoretical foundations of ITRF determination. The algebraic and the kinematic approach Type de document : Chapitre/Contribution Auteurs : Zuheir Altamimi Editeur : Thessaloniki : University of Thessaloniki Année de publication : 2013 Importance : 22 p. Note générale : Publication of the School of Rural & Surveying Engineering, Aristotle University of Thessaloniki Langues : Anglais (eng) Résumé : (auteur) The minimal constraints required for the definition of the reference system in the ITRF formulation are derived for both the one-step approach (simultaneous stacking of coordinate time series for all available space techniques) as well as for the currently implemented two-step approach of stacking for each technique separately and combination of the derived station initial coordinates and velocities. Two types of minimal constraints are studied, the usual algebraic ones related to the variation of the unknown parameters under a change of the reference system known as inner constraints and kinematic ones based on the choice of a reference system with respect to which the apparent variation of station coordinates is minimized. It is shown that under mild conditions on the approximate parameter values used in the linearization of the observation equations the two approaches, algebraic and kinematic one, become identical. Numéro de notice : H2013-012 Affiliation des auteurs : LASTIG LAREG+Ext (2012-mi2018) Nature : Chapître / contribution DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=101203 Documents numériques
peut être téléchargé
Theoretical foundations of ITRF determination - pdf auteurAdobe Acrobat PDF
Titre : The choice of reference system in ITRF formulation Type de document : Article/Communication Auteurs : Zuheir Altamimi Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2012 Collection : International Association of Geodesy Symposia, ISSN 0939-9585 num. 137 Conférence : IAG 2009, 7th Hotine-Marussi Symposium on Mathematical Geodesy 06/06/2009 10/06/2009 Rome Italie Proceedings Springer Importance : pp 329 - 334 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] barycentre
[Termes IGN] coordonnées cartésiennes géocentriques
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] moment cinétique
[Termes IGN] système de référence géodésique
[Termes IGN] vitesseRésumé : (auteur) The problem of choosing an optimal reference system for the International Terrestrial Reference Frame (ITRF) is studied for both the rigorous solution which is a simultaneous stacking (removal of the reference system at each data epoch and implementation of a linear in time coordinate model) for all techniques, as well as for the usual numerically convenient separation into a set of individual stackings one for each technique and a final combination step for the derived initial coordinates and velocities. Two approaches are followed, an algebraic and a kinematic one. The algebraic approach implements the inner constraints, which minimize the sum of squares of the unknown parameters, as well as partial inner constraints, which minimize the sum of squares of a subset of the unknown parameters. In the kinematical approach the optimal minimal constraints are derived by requiring the minimization of the apparent coordinate variations: (a) with respect to the origin by imposing constant coordinates for the network barycenter, (b) with respect to orientation by imposing zero relative angular momentum for the network points conceived as mass points with equal mass and (c) with respect to the scale by imposing constant mean quadratic size (involving the distances of stations from their barycenter). Numéro de notice : C2009-036 Affiliation des auteurs : LAREG+Ext (1991-2011) Thématique : POSITIONNEMENT Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1007/978-3-642-22078-4_49 Date de publication en ligne : 18/10/2011 En ligne : https://doi.org/10.1007/978-3-642-22078-4_49 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=91643
Titre : Geomatic methods for the analysis of data in the Earth sciences Type de document : Monographie Auteurs : Athanasios Dermanis, Éditeur scientifique ; Armin Grun, Éditeur scientifique ; Fernando Sanso, Éditeur scientifique Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2000 Collection : Lecture notes in Earth sciences num. 95 Importance : 250 p. Format : 15 x 23 cm ISBN/ISSN/EAN : 978-3-540-67476-4 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse numérique
[Termes IGN] analyse de données
[Termes IGN] détection de contours
[Termes IGN] estimation statistique
[Termes IGN] géodésie
[Termes IGN] modèle stochastique
[Termes IGN] optimisation (mathématiques)
[Termes IGN] problème inverse
[Termes IGN] quantité continue
[Termes IGN] quantité discrète
[Termes IGN] restauration d'image
[Termes IGN] système linéaire
[Termes IGN] théorème de Fermat
[Termes IGN] tomographieRésumé : (Editeur) This series reports new developments in research and teaching in the entire field of earth sciences quickly, informally, and at a high level. The timeliness of a manuscript is more important than its form, which may be unfinished or tentative. The type of material considered for publication includes :
- drafts of original papers or monographs
- technical reports of high quality and broad interest
- advanced-level lectures
- reports of meetings, provided they are of exceptional interest and focuses on a single topic.Note de contenu : - An overview of data analysis methods in geomatics / A. Dermanis, F. Sanso, A. Grun
- Data analysis methods in geodesy / A. Dermanis & R. Rummel
- Linear and nonlinear inverses problems / R. Snieder & J. Trampert
- Image preprocessing for feature extraction in digital intensity, color and range images / W. Forstner
- Optimization-based approaches to feature extraction from aerial images / P. Fua, A. Gruen & H. Li
- Diffraction tomography through phase back-projection / S. Valle, F. Rocca & L. ZanziNuméro de notice : 68744 Affiliation des auteurs : non IGN Thématique : MATHEMATIQUE Nature : Recueil / ouvrage collectif Accessibilité hors numérique : Accessible via le SUDOC (sur demande au cdos) Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=44763
