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Absolute IGS antenna phase center model igs08.atx: status and potential improvements / Ralf Schmid in Journal of geodesy, vol 90 n° 4 (April 2016)  

Public [article]  inJournal of geodesy > vol 90 n° 4 (April 2016) . - pp 343 - 364 Titre : Absolute IGS antenna phase center model igs08.atx: status and potential improvements Type de document : Article/Communication Auteurs : Ralf Schmid, Auteur ; Rolf Dach, Auteur ; Xavier Collilieux , Auteur ; Adrian Jäggi, Auteur ; M. Schmitz, Auteur ; F. Dilssner, Auteur Année de publication : 2016 Article en page(s) : pp 343 - 364 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux [Termes IGN] antenne GNSS [Termes IGN] centre de phase [Termes IGN] étalonnage d'instrument [Termes IGN] International Terrestrial Reference Frame [Termes IGN] orbite basse [Termes IGN] positionnement par GLONASS [Termes IGN] positionnement par GNSS [Termes IGN] positionnement par GPS Résumé : (auteur) On 17 April 2011, all analysis centers (ACs) of the International GNSS Service (IGS) adopted the reference frame realization IGS08 and the corresponding absolute antenna phase center model igs08.atx for their routine analyses. The latter consists of an updated set of receiver and satellite antenna phase center offsets and variations (PCOs and PCVs). An update of the model was necessary due to the difference of about 1 ppb in the terrestrial scale between two consecutive realizations of the International Terrestrial Reference Frame (ITRF2008 vs. ITRF2005), as that parameter is highly correlated with the GNSS satellite antenna PCO components in the radial direction. For the receiver antennas, more individual calibrations could be considered and GLONASS-specific correction values were added. For the satellite antennas, all correction values except for the GPS PCVs were newly estimated considering more data than for the former model. Satellite-specific PCOs for all GPS satellites active since 1994 could be derived from reprocessed solutions of five ACs generated within the scope of the first IGS reprocessing campaign. Two ACs separately derived a full set of corrections for all GLONASS satellites active since 2003. Ignoring scale-related biases, the accuracy of the satellite antenna PCOs is on the level of a few cm. With the new phase center model, orbit discontinuities at day boundaries can be reduced, and the consistency between GPS and GLONASS results is improved. To support the analysis of low Earth orbiter (LEO) data, igs08.atx was extended with LEO-derived PCV estimates for big nadir angles in June 2013. Numéro de notice : A2016-249 Affiliation des auteurs : LASTIG LAREG+Ext (2012-mi2018) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-015-0876-3 Date de publication en ligne : 23/12/2015 En ligne : http://dx.doi.org/10.1007/s00190-015-0876-3 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80757 [article]

GPS IIF-1 satellite: Antenna phase center and attitude modeling / F. Dilssner in Inside GNSS, vol 5 n° 6 (September 2010) 

Public [article]  inInside GNSS > vol 5 n° 6 (September 2010) . - 6 p. ; pp 59 - 64 Titre : GPS IIF-1 satellite: Antenna phase center and attitude modeling Type de document : Article/Communication Auteurs : F. Dilssner, Auteur Année de publication : 2010 Article en page(s) : 6 p. ; pp 59 - 64 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes IGN] antenne GPS [Termes IGN] centre de phase [Termes IGN] orientation du capteur [Termes IGN] phase GPS [Termes IGN] satellite GPS Résumé : (Auteur) Calculating the distances between satellites and user equipment is a basic operation for GNSS positioning. More precisely, these ranges are measured from the antenna phase centers of the satellites’ transmitting antenna. However, phase centers vary among types and generations of spacecraft and, further, the calculation requires knowledge of a satellite’s orientation or attitude. A researcher at the European Space Operations Center has analyzed the initial performance of the first GPS Block IIF space vehicle and found some expected - and unexpected - results. Numéro de notice : A2010-672 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33454 [article]

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Estimation of phase center corrections for GLONASS-M satellite antennas / F. Dilssner in Journal of geodesy, vol 84 n° 8 (August 2010)  

Public [article]  inJournal of geodesy > vol 84 n° 8 (August 2010) . - pp 467 - 480 Titre : Estimation of phase center corrections for GLONASS-M satellite antennas Type de document : Article/Communication Auteurs : F. Dilssner, Auteur ; T. Spinger, Auteur ; Claudia Flohrer, Auteur ; John M. Dow, Auteur Année de publication : 2010 Article en page(s) : pp 467 - 480 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement du signal [Termes IGN] antenne GLONASS [Termes IGN] centre de phase [Termes IGN] correction du signal [Termes IGN] International Terrestrial Reference Frame [Termes IGN] mesurage de phase [Termes IGN] positionnement par GNSS [Termes IGN] satellite GLONASS [Termes IGN] station GLONASS [Termes IGN] traitement du signal Résumé : (Auteur) Driven by the comprehensive modernization of theGLONASS space segment and the increased global availability of GLONASS-capable ground stations, an updated set of satellite-specific antenna phase center corrections for the current GLONASS-M constellation is determined by processing 84 weeks of dual-frequency data collected between January 2008 and August 2009 by a worldwide network of 227 GPS-only and 115 combined GPS/GLONASS tracking stations. The analysis is performed according to a rigorous combined multi-system processing scheme providing full consistency between the GPS and the GLONASS system. The solution is aligned to a realization of the International Terrestrial Reference Frame 2005. The estimated antenna parameters are compared with the model values currently used within the International GNSS Service (IGS). It is shown that the z-offset estimates are on average 7 cm smaller than the corresponding IGS model values and that the block-specific mean value perfectly agrees with the nominal GLONASS-M z-offset provided by the satellite manufacturer. The existence of azimuth-dependent phase center variations is investigated and uncertainties in the horizontal offset estimates due to mathematical correlations and yaw-attitude modeling problems during eclipse seasons are addressed. Finally, it is demonstrated that the orbit quality benefits from the updated GLONASS-M antenna phase center model and that a consistent set of satellite antenna z-offsets for GPS and GLONASS is imperative to obtain consistent GPS- and GLONASS-derived station heights. Numéro de notice : A2010-439 Affiliation des auteurs : non IGN Thématique : IMAGERIE/POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-010-0381-7 Date de publication en ligne : 08/04/2010 En ligne : https://doi.org/10.1007/s00190-010-0381-7 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30632 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
266-2010081	SL	Revue	Centre de documentation	Revues en salle	Disponible

SVN49 and others GPS anomalies: elevation-dependent pseudorange errors in block 2-RS and 2R-MS / Tim A. Springer in Inside GNSS, vol 4 n° 4 (July - August 2009) 

Public [article]  inInside GNSS > vol 4 n° 4 (July - August 2009) . - 5 p. ; pp 32 - 36 Titre : SVN49 and others GPS anomalies: elevation-dependent pseudorange errors in block 2-RS and 2R-MS Type de document : Article/Communication Auteurs : Tim A. Springer, Auteur ; F. Dilssner, Auteur Année de publication : 2009 Article en page(s) : 5 p. ; pp 32 - 36 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes IGN] erreur de mesure [Termes IGN] mesurage de pseudo-distance [Termes IGN] positionnement par GPS Résumé : (Auteur) This is an updated version of the web article, Saving SVN49, that includes discussion of the elevation-dependent pseudoranging anomaly on the most recently launched GPS satellite and similar anomalies observed on other GPS satellites. An investigation into the elevation-dependent pseudoranging anomaly on the most recently launched GPS satellite reveals that the U.S. Air Force has implemented an intentional alteration in the broadcast ephemerides and clock data in order to correct the anomaly. The investigators conclude that the solution will probably work for normal navigation users but may pose a difficulty for some high-precision users. Copyright Gibbons Media & Research LLC Numéro de notice : A2009-664 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33565 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
159-09041	SL	Revue	Centre de documentation	Revues en salle	Disponible

Documents numériques

peut être téléchargé SVN49 and others GPS anomalies ... - pdf éditeur Adobe Acrobat PDF