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A simulation study of the errors of omission and commission for GRACE RL01 gravity fields / B. Gunter in Journal of geodesy, vol 80 n° 7 (October 2006)  

Public [article]  inJournal of geodesy > vol 80 n° 7 (October 2006) . - pp 341 - 351 Titre : A simulation study of the errors of omission and commission for GRACE RL01 gravity fields Type de document : Article/Communication Auteurs : B. Gunter, Auteur ; John Ries, Auteur ; S. Bettadpur, Auteur ; et al., Auteur Année de publication : 2006 Article en page(s) : pp 341 - 351 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique [Termes IGN] champ de pesanteur terrestre [Termes IGN] erreur [Termes IGN] estimation statistique [Termes IGN] GRACE [Termes IGN] modèle de géopotentiel [Termes IGN] simulation Résumé : (Auteur) This paper examines the influence that certain omission and commission errors can have on the gravity field models estimated from the initial release of data (RL01) from the Gravity Recovery And Climate Experiment (GRACE) satellite mission. The effects of omission errors were analyzed by limiting the degree and order to which the GPS and K-band range-rate (KBR) measurement partials were extended in the solution process. The commission error studies focused on the impact of an imperfect mean reference gravity field model on the solution. Combinations of both of these error sources were also explored. The nature of these errors makes them difficult to distinguish from the true gravity signal, so the exploration of these error sources was performed using simulations; however, comparisons to real-data solutions are provided. The results show how each of the specific error sources investigated influences the gravity field solution. The simulations also show how all of the errors examined can be sufficiently mitigated through the appropriate choice of processing parameters. Copyright Springer Numéro de notice : A2006-449 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-006-0083-3 En ligne : https://doi.org/10.1007/s00190-006-0083-3 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28173 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
266-06091	RAB	Revue	Centre de documentation	En réserve L003	Disponible
266-06092	RAB	Revue	Centre de documentation	En réserve L003	Disponible

A new combined European permanent network station coordinates solution / Natalia Panafidina in Journal of geodesy, vol 80 n° 7 (October 2006)  

Public [article]  inJournal of geodesy > vol 80 n° 7 (October 2006) . - pp 373 - 380 Titre : A new combined European permanent network station coordinates solution Type de document : Article/Communication Auteurs : Natalia Panafidina, Auteur ; Z. Malkin, Auteur ; Robert Weber, Auteur Année de publication : 2006 Article en page(s) : pp 373 - 380 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux [Termes IGN] coordonnées GPS [Termes IGN] EUREF [Termes IGN] Europe (géographie politique) [Termes IGN] International Terrestrial Reference Frame [Termes IGN] positionnement par GPS [Termes IGN] repère de référence [Termes IGN] réseau géodésique permanent [Termes IGN] réseau permanent EUREF [Termes IGN] station de référence Résumé : (Auteur) The EUREF [International Association of Geodesy (IAG) Reference Frame Sub-Commission for Europe] network of continuously operating GPS stations (EPN) was primarily established for reference frame maintenance, and also plays an important role for geodynamical research in Europe. The main objective of this paper is to obtain an independent homogeneous time series of the EPN station coordinates, which is also available in SINEX format. A new combined solution of the EPN station coordinates was computed. The combination was performed independently for every week, in three steps: (1) the stated constraints on the coordinates were removed from the individual solutions of the Analysis Centers; (2) the de-constrained solutions were aligned to ITRF2000; (3) the resulting solutions were combined using the Helmert blocking technique. All the data from GPS weeks 900 to 1302 (April 1997–December 2004) were used. We investigated in detail the behavior of the transformation parameters aligning the new combined solution to ITRF2000. In general, the time series of the transformation parameters show a good stability in time although small systematic effects can be seen, most likely caused by station instabilities. A comparison of the new combined solution to the official EUREF weekly combined solution is also presented. Copyright Springer Numéro de notice : A2006-450 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-006-0076-2 En ligne : https://doi.org/10.1007/s00190-006-0076-2 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28174 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
266-06091	RAB	Revue	Centre de documentation	En réserve L003	Disponible
266-06092	RAB	Revue	Centre de documentation	En réserve L003	Disponible