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Titre : International VLBI Service for Geodesy and Astrometry 2013 annual report Type de document : Rapport Auteurs : Karen D. Baver, Éditeur scientifique ; Dirk Behrend, Éditeur scientifique ; Kyla L. Armstrong, Éditeur scientifique Editeur : Washington : National Aeronautics and Space Administration NASA Année de publication : 2014 Importance : 376 p. Format : 21 x 28 cm Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] astrométrie
[Termes IGN] géodynamique
[Termes IGN] interférométrie à très grande base
[Termes IGN] orientation de la Terre
[Termes IGN] radioastronomie
[Termes IGN] repère de référence
[Termes IGN] rotation de la Terre
[Termes IGN] système de référence céleste
[Termes IGN] système de référence mondialNuméro de notice : 14853 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Rapport d'activité En ligne : http://ivscc.gsfc.nasa.gov/publications/annualreport.html Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=75734 Non-linear station motions in epoch and multi-year reference frames / Mathis Blossfeld in Journal of geodesy, vol 88 n° 1 (January 2014)
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Titre : Non-linear station motions in epoch and multi-year reference frames Type de document : Article/Communication Auteurs : Mathis Blossfeld, Auteur Année de publication : 2014 Article en page(s) : pp 45 - 63 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] données GPS
[Termes IGN] données ITGB
[Termes IGN] données TLS (télémétrie)
[Termes IGN] orientation de la Terre
[Termes IGN] repère de référence
[Termes IGN] station GPS
[Termes IGN] surveillance d'ouvrage
[Termes IGN] surveillance géologiqueRésumé : (Auteur) In the conventions of the International Earth Rotation and Reference Systems Service (e.g. IERS Conventions 2010), it is recommended that the instantaneous station position, which is fixed to the Earth’s crust, is described by a regularized station position and conventional correction models. Current realizations of the International Terrestrial Reference Frame use a station position at a reference epoch and a constant velocity to describe the motion of the regularized station position in time. An advantage of this parameterization is the possibility to provide station coordinates of high accuracy over a long time span. Various publications have shown that residual non-linear station motions can reach a magnitude of a few centimeters due to not considered loading effects. Consistently estimated parameters like the Earth Orientation Parameters (EOP) may be affected if these non-linear station motions are neglected. In this paper, we investigate a new approach, which is based on a frequent (e.g. weekly) estimation of station positions and EOP from a combination of epoch normal equations of the space geodetic techniques Global Positioning System (GPS), Satellite Laser Ranging (SLR) and Very Long Baseline Interferometry (VLBI). The resulting time series of epoch reference frames are studied in detail and are compared with the conventional secular approach. It is shown that both approaches have specific advantages and disadvantages, which are discussed in the paper. A major advantage of the frequently estimated epoch reference frames is that the non-linear station motions are implicitly taken into account, which is a major limiting factor for the accuracy of the secular frames. Various test computations and comparisons between the epoch and secular approach are performed. The authors found that the consistently estimated EOP are systematically affected by the two different combination approaches. The differences between the epoch and secular frames reach magnitudes of 23.6 uas (0.73 mm) and 39.8 uas (1.23 mm) for the x-pole and y-pole, respectively, in case of the combined solutions. For the SLR-only solutions, significant differences with amplitudes of 77.3 uas (2.39 mm) can be found. Numéro de notice : A2014-102 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-013-0668-6 Date de publication en ligne : 05/11/2013 En ligne : https://doi.org/10.1007/s00190-013-0668-6 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33007
in Journal of geodesy > vol 88 n° 1 (January 2014) . - pp 45 - 63[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 266-2014011 SL Revue Centre de documentation Revues en salle Disponible Precise position determination using a Galileo E5 single-frequency receiver / H. Toho Diessongo in GPS solutions, vol 18 n° 1 (january 2014)
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Titre : Precise position determination using a Galileo E5 single-frequency receiver Type de document : Article/Communication Auteurs : H. Toho Diessongo, Auteur ; Torben Schüler, Auteur ; Stefan Junker, Auteur Année de publication : 2014 Article en page(s) : pp 73 - 83 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement
[Termes IGN] code GNSS
[Termes IGN] positionnement par Galileo
[Termes IGN] positionnement ponctuel précis
[Termes IGN] résolution d'ambiguïté
[Termes IGN] retard ionosphèrique
[Termes IGN] signal GalileoRésumé : (auteur) The European Galileo system offers one dedicated signal that is superior to all other signals currently available in space, namely the broadband signal E5. This signal has a bandwidth of at least 51 MHz using an AltBOC modulation. It features a code range noise at centimeter level. Additionally, the impact of multipath effects on this signal is significantly lower compared to all other available GNSS signals. These unique features of Galileo E5 drastically improve the precision of code range measurements and hence enable precise single-frequency positioning. Certain scientific and non-scientific applications in the positioning domain could likely benefit from the exploitation of E5 measurements. A positioning approach based on an additive combination of code range and carrier phase measurements (CPC—“code-plus-carrier”) to eliminate the ionospheric delay could be used to perform precise positioning over long distances. Unfortunately, this derived observable contains the ambiguity term as an additional unknown what normally requires longer observation windows in order to allow sufficient convergence of the ambiguity parameters. For this reason, a rapid convergence algorithm based on Kalman filtering was implemented in addition to the conventional CPC approach that is also discussed. The CPC-based results yield a positioning precision of 2–5 cm after a convergence time of about 3 h. The rapid convergence filter allows fixing the ambiguity terms within a few minutes, and the obtained position results are at the sub-decimeter level. Regarding one selected test, real data from Galileo experimental satellite GIOVE A were used in order to confirm our assumptions. However, since the current Galileo constellation is not sufficient for real-world positioning trials yet, all major results are based on simulated data. Numéro de notice : A2014-655 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1007/s10291-013-0311-2 En ligne : https://doi.org/10.1007/s10291-013-0311-2 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=77826
in GPS solutions > vol 18 n° 1 (january 2014) . - pp 73 - 83[article]Quad-Constellation Receiver: GPS, GLONASS, Galileo, BeiDou / Philip G. Mattos in GPS world, vol 25 n° 1 (January 2014)
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Titre : Quad-Constellation Receiver: GPS, GLONASS, Galileo, BeiDou Type de document : Article/Communication Auteurs : Philip G. Mattos, Auteur ; Fabio Pisoni, Auteur Année de publication : 2014 Article en page(s) : 5 p. ; pp 34 - 63 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] constellation BeiDou
[Termes IGN] constellation Galileo
[Termes IGN] constellation GLONASS
[Termes IGN] constellation GPS
[Termes IGN] implémentation (informatique)
[Termes IGN] positionnement par GNSS
[Termes IGN] récepteur GNSSRésumé : (Auteur) The implementation changes and first live tests of BeiDou and Galileo on Teseo-3 GNSS chips developed in 2013 are covered, bringing it to a four-constellation machine. By 2020, we expect to have four global constellations all on the same band, giving us more than 100 satellites — under clear sky, as many as 30 or 40 simultaneously. Numéro de notice : A2014-032 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32937
in GPS world > vol 25 n° 1 (January 2014) . - 5 p. ; pp 34 - 63[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 067-2014011 RAB Revue Centre de documentation En réserve L003 Disponible
Titre : Quality assessment of SLR data-related products Type de document : Article/Communication Auteurs : Jean-Michel Lemoine, Auteur ; Florent Deleflie, Auteur ; Franck Reinquin, Auteur ; David Coulot , Auteur
Editeur : Greenbelt (Maryland) : Goddard Space Flight Center Année de publication : 2014 Conférence : IWLR 2013, 18th international workshop on Laser Ranging 11/11/2013 15/11/2013 Fujiyoshida Japon OA Proceedings Importance : 6 p. Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] données TLS (télémétrie)
[Termes IGN] évaluation des données
[Termes IGN] qualité des donnéesRésumé : (auteur) We analyse SLR data-related products that are computed from Lageos-1 and Lageos-2 data acquired by the ILRS network. We analyze time series of post-fit residuals for both satellites, biases and space stations coordinates (SSCs), that are deduced following the recommendations provided by the Analysis Working Group. We compute the same kind of products, with a GRGS updated version of SLRF2008. Finally, we propose a change in the operational strategy to improve the accuracy of the products delivered by the ILRS. Numéro de notice : C2013-003 Affiliation des auteurs : LASTIG LAREG+Ext (2012-mi2018) Thématique : POSITIONNEMENT Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : sans En ligne : http://cddis.gsfc.nasa.gov/lw18/docs/papers/Session3/13-02-04-Deleflie.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=78577 Documents numériques
en open access
Quality assessment of SLR data-related productsAdobe Acrobat PDFQuantifying the correlation between the MEI and LOD variations by decomposing LOD with singular spectrum analysis / Karine Le Bail (2014)
PermalinkRecherche des sous-réseaux d’antennes VLBI et de radio‐sources extra‐galactiques par algorithmes génétiques / Serge Nyoka (2014)
PermalinkPermalinkPermalinkPermalinkPermalinkPermalinkModernization of GEONET from GPS to GNSS / Hiromichi Tsuji in Bulletin of the GeoSpatial Information authority of Japan, vol 61 (December 2013)
PermalinkPermalinkPrincipe de fonctionnement d'un géonavigateur / Serge Botton in XYZ, n° 137 (décembre 2013 - février 2014)
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