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Development of an improved empirical model for slant delays in the troposphere (GPT2w) / Johannes Böhm in GPS solutions, vol 19 n° 3 (July 2015)    

Public [article]  inGPS solutions > vol 19 n° 3 (July 2015) . - pp 433 - 441 Titre : Development of an improved empirical model for slant delays in the troposphere (GPT2w) Type de document : Article/Communication Auteurs : Johannes Böhm , Auteur ; Gregor Möller, Auteur ; Michael Schindelegger, Auteur ; Grégory Pain, Auteur ; Robert Weber, Auteur Année de publication : 2015 Article en page(s) : pp 433 - 441 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale [Termes IGN] coordonnées GNSS [Termes IGN] erreur systématique [Termes IGN] modèle empirique [Termes IGN] retard troposphérique [Termes IGN] station permanente [Termes IGN] teneur en vapeur d'eau Résumé : (Auteur) Global pressure and temperature 2 wet (GPT2w) is an empirical troposphere delay model providing the mean values plus annual and semiannual amplitudes of pressure, temperature and its lapse rate, water vapor pressure and its decrease factor, weighted mean temperature, as well as hydrostatic and wet mapping function coefficients of the Vienna mapping function 1. All climatological parameters have been derived consistently from monthly mean pressure level data of ERA-Interim fields (European Centre for Medium-Range Weather Forecasts Re-Analysis) with a horizontal resolution of 1°, and the model is suitable to calculate slant hydrostatic and wet delays down to 3° elevation at sites in the vicinity of the earth surface using the date and approximate station coordinates as input. The wet delay estimation builds upon gridded values of the water vapor pressure, the weighted mean temperature, and the water vapor decrease factor, with the latter being tuned to ray-traced zenith wet delays. Comparisons with zenith delays at 341 globally distributed global navigation satellite systems stations show that the mean bias over all stations is below 1 mm and the mean standard deviation is about 3.6 cm. The GPT2w model with the gridded input file is provided at. Numéro de notice : A2015--112 Affiliation des auteurs : ENSG+Ext (2012-2019) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s10291-014-0403-7 Date de publication en ligne : 26/08/2014 En ligne : https://doi.org/10.1007/s10291-014-0403-7 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=90646 [article]

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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

The international GLONASS experiment: products, progress and prospects / Robert Weber in Journal of geodesy, vol 75 n° 11 (November 2001)  

Public [article]  inJournal of geodesy > vol 75 n° 11 (November 2001) . - pp 559 - 568 Titre : The international GLONASS experiment: products, progress and prospects Type de document : Article/Communication Auteurs : Robert Weber, Auteur ; Tim A. Springer, Auteur Année de publication : 2001 Article en page(s) : pp 559 - 568 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes IGN] Global Orbitography Navigation Satellite System [Termes IGN] international GLONASS experiment [Termes IGN] orbitographie [Termes IGN] poursuite de satellite [Termes IGN] rayonnement solaire [Termes IGN] satellite artificiel Résumé : (Auteur) In October 1998 the IGEX field campaign, the first coordinated international effort to monitor GLONASS satellites on global basis, was started. Currently about 40 institutions worldwide support this effort either by providing GLONASS tracking data or in operating related data and analysis centers. The increasing quality and consistency of the calculated GLONASS orbits (about 25 cm early in 2000), even after the end of the official IGEX field campaign, are shown. Particular attention is drawn to the combination of precise ephemerides in order to generate a robust, reliable and complete IGEX orbits product. Some problems in modeling the effect of solar radiation pressure on GLONASS satellites are demonstrated. Finally, the expected benefits and prospects of the upcoming International GLOnass ServicePilot Project (1GLOSPP) of the International GPS Service (IGS) are discussed in more detail. Numéro de notice : A2001-135 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s001900100199 En ligne : https://doi.org/10.1007/s001900100199 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21830 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
266-01101	RAB	Revue	Centre de documentation	En réserve L003	Disponible
266-01102	RAB	Revue	Centre de documentation	En réserve L003	Disponible