Journal of geophysical research : Solid Earth / American Geophysical Union . vol 112 n° B5Paru le : 01/05/2007 |
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Ajouter le résultat dans votre panierToward a direct combination of space-geodetic techniques at the measurement level: Methodology and main issues / David Coulot in Journal of geophysical research : Solid Earth, vol 112 n° B5 (May 2007)
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Titre : Toward a direct combination of space-geodetic techniques at the measurement level: Methodology and main issues Type de document : Article/Communication Auteurs : David Coulot , Auteur ; Philippe Berio, Auteur ; Richard Biancale, Auteur ; Sylvain Loyer, Auteur ; Laurent Soudarin, Auteur ; Anne-Marie Gontier, Auteur Année de publication : 2007 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] analyse comparative
[Termes IGN] erreur systématique inter-systèmes
[Termes IGN] positionnement par DORIS
[Termes IGN] positionnement par GNSS
[Termes IGN] positionnement par ITGB
[Termes IGN] positionnement par télémétrie laser sur satelliteRésumé : (auteur) In the framework of the activities of the Combination Research Centers (CRC) of the International Earth Rotation and Reference Systems Service (IERS), the French Groupe de Recherche en Géodésie Spatiale (GRGS) studies the benefit of combining space-geodetic techniques (Doppler orbitography and radiopositioning integrated by satellite, GPS, satellite laser ranging, and very long baseline interferometry) at the observational level. This combination aims to produce a global and consistent solution for Earth orientation parameters (EOPs), polar motion xp and yp, and universal time UT1 with a 1-day or a 6-hour sampling, as well as weekly station positions. In this paper we present a methodology for multitechnique combination at the observational level. We process the measurements of the four techniques over a 1-year period (the year 2002) in order to illustrate and validate our method. All techniques are processed with the same computational framework, thus with the same models and a priori values for parameters. By using the same software and conventions, we avoid inconsistencies in individual computations. We process each technique individually and inside the combination. The comparison between these solutions is a way of analyzing the power of our method even if the actual status of our software does not reproduce the state-of-the-art analyses of each technique. However, we produce an analysis of the quality of our individual computations so that readers can get an informed appreciation of the current capabilities of our software. Finally, we present the capability of such combinations in terms of accuracy and precision, we underline the main issues of our method and propose solutions to solve them in the future. Numéro de notice : A2007-671 Affiliation des auteurs : LAREG+Ext (1991-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1029/2006JB004336 En ligne : https://doi.org/10.1029/2006JB004336 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=102707
in Journal of geophysical research : Solid Earth > vol 112 n° B5 (May 2007)[article]