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Generation of a consistent absolute phase center correction model for GPS receiver and satellite antennas / Ralf Schmid in Journal of geodesy, vol 81 n° 12 (December 2007)  

Public [article]  inJournal of geodesy > vol 81 n° 12 (December 2007) . - pp 781 - 798 Titre : Generation of a consistent absolute phase center correction model for GPS receiver and satellite antennas Type de document : Article/Communication Auteurs : Ralf Schmid, Auteur ; Peter Steigenberger, Auteur ; et al., Auteur Année de publication : 2007 Article en page(s) : pp 781 - 798 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes IGN] antenne GPS [Termes IGN] centre de phase [Termes IGN] correction du signal [Termes IGN] données GPS [Termes IGN] jeu de données [Termes IGN] phase GPS [Termes IGN] récepteur GPS Résumé : (Auteur) The development and numerical values of the new absolute phase-center correction model for GPS receiver and satellite antennas, as adopted by the International GNSS (global navigation satellite systems) Service, are presented. Fixing absolute receiver antenna phase-center corrections to robot-based calibrations, the GeoForschungsZentrum Potsdam (GFZ) and the Technische Universität München reprocessed more than 10 years of GPS data in order to generate a consistent set of nadir-dependent phase-center variations (PCVs) and offsets in the z-direction pointing toward the Earth for all GPS satellites in orbit during that period. The agreement between the two solutions estimated by independent software packages is better than 1 mm for the PCVs and about 4 cm for the z-offsets. In addition, the long time-series facilitates the study of correlations of the satellite antenna corrections with several other parameters such as the global terrestrial scale or the orientation of the orbital planes with respect to the Sun. Finally, completely reprocessed GPS solutions using different phase-center correction models demonstrate the benefits from switching from relative to absolute antenna phase-center corrections. For example, tropospheric zenith delay biases between GPS and very long baseline interferometry (VLBI), as well as the drift of the terrestrial scale, are reduced and the GPS orbit consistency is improved. Copyright Springer Numéro de notice : A2007-525 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-007-0148-y En ligne : https://doi.org/10.1007/s00190-007-0148-y Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28888 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
266-07101	RAB	Revue	Centre de documentation	En réserve L003	Disponible
266-07102	RAB	Revue	Centre de documentation	En réserve L003	Disponible

The wavelet method as an alternative for reducing ionospheric effects from single-frequency GPS receivers / E.M. DE Souza in Journal of geodesy, vol 81 n° 12 (December 2007)  

Public [article]  inJournal of geodesy > vol 81 n° 12 (December 2007) . - pp 799 - 804 Titre : The wavelet method as an alternative for reducing ionospheric effects from single-frequency GPS receivers Type de document : Article/Communication Auteurs : E.M. DE Souza, Auteur ; João F.G. Monico, Auteur Année de publication : 2007 Article en page(s) : pp 799 - 804 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes IGN] analyse multirésolution [Termes IGN] double différence [Termes IGN] perturbation ionosphérique [Termes IGN] récepteur monofréquence [Termes IGN] signal GPS [Termes IGN] transformation en ondelettes Résumé : (Auteur) The ionospheric effect is one of the major errors in GPS data processing over long baselines. As a dispersive medium, it is possible to compute its influence on the GPS signal with the ionosphere-free linear combination of L1 and L2 observables, requiring dual-frequency receivers. In the case of single-frequency receivers, ionospheric effects are either neglected or reduced by using a model. In this paper, an alternative for single-frequency users is proposed. It involves multiresolution analysis (MRA) using a wavelet analysis of the double-difference observations to remove the short- and medium-scale ionosphere variations and disturbances, as well as some minor tropospheric effects. Experiments were carried out over three baseline lengths from 50 to 450 km, and the results provided by the proposed method were better than those from dual-frequency receivers. The horizontal root mean square was of about 0.28 m (1ó). Copyright Springer Numéro de notice : A2007-526 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-007-0150-4 En ligne : https://doi.org/10.1007/s00190-007-0150-4 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28889 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
266-07101	RAB	Revue	Centre de documentation	En réserve L003	Disponible
266-07102	RAB	Revue	Centre de documentation	En réserve L003	Disponible