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[n° ou bulletin]
[n° ou bulletin]
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Exemplaires(1)
Code-barres | Cote | Support | Localisation | Section | Disponibilité |
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013-2010021 | RAB | Revue | Centre de documentation | En réserve L003 | Disponible |
Dépouillements


Hellenic terrestrial reference system 2007 (HTRS07): a regional realization of ETRS89 over Greece in support of HEPOS / K. Katsampalos in Bulletin of geodesy and geomatics BGG, vol 69 n° 2 - 3 (December 2010)
[article]
Titre : Hellenic terrestrial reference system 2007 (HTRS07): a regional realization of ETRS89 over Greece in support of HEPOS Type de document : Article/Communication Auteurs : K. Katsampalos, Auteur ; Christopher Kotsakis, Auteur ; M. Gianniou, Auteur Année de publication : 2010 Article en page(s) : pp 329 - 347 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] compensation par moindres carrés
[Termes IGN] European Terrestrial Reference System 1989
[Termes IGN] Grèce
[Termes IGN] HEPOS
[Termes IGN] précision décimétrique
[Termes IGN] station permanente
[Termes IGN] système de référence local
[Termes IGN] transformation de coordonnéesRésumé : (Auteur) An overview of a regional realization of ETRS89 over the area of Greece is presented in this paper. The underlying project is related to the recent establishment of the Hellenic Positioning System (HEPOS), a GPS-based spatial positioning service using a network of 98 continuously operating reference stations located in Greece and operated by KTIMATOLOGIO S.A. The data analysis procedure that was followed for the least-squares adjustment of the HEPOS network is described, along with the adopted methodology for the datum definition and its alignment with the ETRS89/ETRF05 reference frame. The paper presents also a combined transformation model that was concurrently developed for the connection between the official Hellenic Geodetic Reference System 1987 (HGRS87) and the Hellenic Terrestrial Reference System 2007 (HTRS07), where the latter identifies the ETRS89/ETRF05-based frame that underlies the operation of HEPOS. The results obtained from the evaluation of the aforementioned model, at 2430 geodetic benchmarks throughout Greece, revealed an accuracy level that is better than 10 cm in terms of the rms value for the total horizontal transformation error. Numéro de notice : A2010-497 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31336
in Bulletin of geodesy and geomatics BGG > vol 69 n° 2 - 3 (December 2010) . - pp 329 - 347[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 013-2010021 RAB Revue Centre de documentation En réserve L003 Disponible Categorization of permanent GNSS reference stations / A. Kenyeres in Bulletin of geodesy and geomatics BGG, vol 69 n° 2 - 3 (December 2010)
[article]
Titre : Categorization of permanent GNSS reference stations Type de document : Article/Communication Auteurs : A. Kenyeres, Auteur Année de publication : 2010 Article en page(s) : pp 375 - 390 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] réseau géodésique permanent
[Termes IGN] station de réception
[Termes IGN] station de référence
[Termes IGN] station GNSSRésumé : (Auteur) The global reference frame realizations (as ITRFyy) (International Terrestrial Reference Frame), the corresponding IGSyy (International GNSS Service) and their regional densification solutions are published as SSC (Set of Station Coordinates and velocities) and SINEX files, where each of the included stations are treated in the same way and the coordinates refer to a single common epoch. Although these realizations are considered the actually best solution, it does not mean that all involved stations have the same level of reliability. The only product quality indicators are the uncertainties rendered to the coordinates and velocities, therefore the users must pay special regard to avoid distortions in the actual applications. In this paper, the separation and categorization of the reference stations is proposed. The categorization is based on the analysis of series of consecutive cumulative solution, where the convergence of the velocity estimates is considered as main categorization criteria. Class_A includes the reliable fiducial stations with long observation series (at least one years of recent data) and "consolidated" velocity parameters. Class_B mostly covers young sites, which not yet fulfilling the criteria for being fiducial station, and those may only be used for solution control. The Class_B stations also have high quality cumulative coordinates, referred to the epoch of minimum variance, which is different at each site, however no velocities are published. The main target of the proposed categorization/separation is not the exclusion of any reference sites, rather the estimation of the optimal (earliest) epoch for a recently installed stations, from when it can be used as geodetic reference. The categorization criteria and the related terms are described and discussed in the paper. This approach is successfully implemented for the EPN (EUREF Permanent Network). We found that as of January 2010 about 80% of the EPN stations can be considered as Class_A, and more than 50, recently installed stations are still not offered as fiducial for reference frame applications. The categorization is revised in each 15 weeks, and these stations are moved to Class_A, when they fulfilling the respective criteria. The presented approach is straightforward and can easily be extended both to global and national long term GNSS solutions. Numéro de notice : A2010-605 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31338
in Bulletin of geodesy and geomatics BGG > vol 69 n° 2 - 3 (December 2010) . - pp 375 - 390[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 013-2010021 RAB Revue Centre de documentation En réserve L003 Disponible Precise point positioning with ATOMIUM using IGS orbit and clock products: first results / Quentin Baire in Bulletin of geodesy and geomatics BGG, vol 69 n° 2 - 3 (December 2010)
[article]
Titre : Precise point positioning with ATOMIUM using IGS orbit and clock products: first results Type de document : Article/Communication Auteurs : Quentin Baire, Auteur ; Carine Bruyninx, Auteur ; P. Defraigne, Auteur ; Juliette Legrand, Auteur Année de publication : 2010 Article en page(s) : pp 391 - 400 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] Atomium
[Termes IGN] positionnement ponctuel précis
[Termes IGN] propagation troposphérique
[Termes IGN] station de réception
[Termes IGN] traitement de données GNSS
[Termes IGN] transformation de HelmertRésumé : (Auteur) In this paper, we investigate the quality of the station positions determined by Precise Point Positioning using ATOMIUM. For that purpose, the IGS orbits and clock files are considered as a priori information while ATOMIUM estimates daily station positions, hourly tropospheric zenith path delays and epoch-wise station clock synchronization errors with respect to the IGS time. In addition to its very fast operation (a daily run takes about 5 seconds by station), the mean weekly position repeatability obtained with ATOMIUM is at the level of 3.9 mm for the north, 2.4 mm for the east and 6.8 mm for the up component. If in addition, a Helmert transformation is performed to more reliably express the solution in the IGS05, then the mean weekly station position repeatabilities reach 3.1 mm for the north, 1.9 mm for the east and 5.7 mm for the up component, i.e. similar to what is presently obtained with the Bernese. Numéro de notice : A2010-595 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31339
in Bulletin of geodesy and geomatics BGG > vol 69 n° 2 - 3 (December 2010) . - pp 391 - 400[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 013-2010021 RAB Revue Centre de documentation En réserve L003 Disponible Rapid static positioning using GPS and GLONASS / Gerhard Beutler in Bulletin of geodesy and geomatics BGG, vol 69 n° 2 - 3 (December 2010)
[article]
Titre : Rapid static positioning using GPS and GLONASS Type de document : Article/Communication Auteurs : Gerhard Beutler, Auteur ; Michael Meindl, Auteur Année de publication : 2010 Article en page(s) : pp 179 - 194 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] ambiguïté entière
[Termes IGN] Bernese
[Termes IGN] compensation Lambda
[Termes IGN] données GLONASS
[Termes IGN] données GNSS
[Termes IGN] positionnement statique rapide
[Termes IGN] résolution d'ambiguïté
[Termes IGN] traitement de données GNSSRésumé : (Auteur) For rapid static positioning, the combined analysis of all observed GNSS becomes more and more important in view of the steadily increasing number of active satellites (early in 2009 exceeding 50 GPS+GLONASS satellites). Successful ambiguity fixing for all involved GNSS is the key for this application. First results of an implementation of a «GNSS-capable» LAMBDA ambiguity resolution scheme into a project version of the Bernese Software are presented. Numéro de notice : A2010-596 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31340
in Bulletin of geodesy and geomatics BGG > vol 69 n° 2 - 3 (December 2010) . - pp 179 - 194[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 013-2010021 RAB Revue Centre de documentation En réserve L003 Disponible Measurement accuracy in Network-RTK / R. Emardson in Bulletin of geodesy and geomatics BGG, vol 69 n° 2 - 3 (December 2010)
[article]
Titre : Measurement accuracy in Network-RTK Type de document : Article/Communication Auteurs : R. Emardson, Auteur ; P. Jarlemark, Auteur ; et al., Auteur Année de publication : 2010 Article en page(s) : pp 211 - 225 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] données BeiDou
[Termes IGN] données Galileo
[Termes IGN] données GLONASS
[Termes IGN] données GPS
[Termes IGN] erreur de positionnement
[Termes IGN] hauteur ellipsoïdale
[Termes IGN] positionnement cinématique en temps réel
[Termes IGN] précision altimétrique
[Termes IGN] précision du positionnementRésumé : (Auteur) New satellite systems such as the European Galileo and the ongoing modernization of GPS and GLONASS, allow for improvements in accurate positioning. Real Time Kinematic (RTK) is a system that utilises Global Navigation Satellite Systems (GNSS) to provide accurate positioning in real time. In this paper, we describe the error sources in network-RTK, and how the increased number of satellites and new signals are best served to achieve the desired improvement in performance. Using simulations we find that the inclusion of future satellite systems such as Galileo and Compass can reduce the error in the vertical coordinate of the estimated position from 27 mm to 20 mm for a reference network with 70 km between the reference stations. For periods with high spatial variability in the ionosphere, it is important to consider the tradeoff between influence from the ionosphere and from the local environment. A densified network with 35 km between the reference stations results in a similar improvement as the contribution of the new satellite systems. The error in the estimated vertical coordinate is reduced from 27 mm to 18 mm. Using both a densified network and the new satellite systems reduces the error further down to 13 mm. Numéro de notice : A2010-597 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31341
in Bulletin of geodesy and geomatics BGG > vol 69 n° 2 - 3 (December 2010) . - pp 211 - 225[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 013-2010021 RAB Revue Centre de documentation En réserve L003 Disponible Monitoring of official national ETRF coordinates on EPN web project for the EUREF TWG [technical working group] / Elmar Brockmann in Bulletin of geodesy and geomatics BGG, vol 69 n° 2 - 3 (December 2010)
[article]
Titre : Monitoring of official national ETRF coordinates on EPN web project for the EUREF TWG [technical working group] Type de document : Article/Communication Auteurs : Elmar Brockmann, Auteur Année de publication : 2010 Article en page(s) : pp 246 - 256 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] Europe (géographie politique)
[Termes IGN] European Terrestrial Reference Frame
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] réseau permanent EUREFRésumé : (Auteur) The EUREF Permanent Network EPN is permanently analyzed by different analysis centers in order to density the international reference frame ITRF and in order to monitor the European reference frame ETRF. Furthermore, the different European countries adopted realizations of the ETRF in the past years and decades. The described project of the EUREF technical working group (TWG) shows for a sub-set of 14 European countries, how homogeneous the different national reference frames are realized compared to a consistently computed multi-annual solution published by EUREF in Dec., 2008. A collection of all officially used national ETRF coordinates for the EPN stations and its publication on the EPN web pages is a by-product of this project. Numéro de notice : A2010-598 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31342
in Bulletin of geodesy and geomatics BGG > vol 69 n° 2 - 3 (December 2010) . - pp 246 - 256[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 013-2010021 RAB Revue Centre de documentation En réserve L003 Disponible Results and comparisons of a local and a regional reprocessed GNSS network / Juliette Legrand in Bulletin of geodesy and geomatics BGG, vol 69 n° 2 - 3 (December 2010)
[article]
Titre : Results and comparisons of a local and a regional reprocessed GNSS network Type de document : Article/Communication Auteurs : Juliette Legrand, Auteur ; Carine Bruyninx, Auteur ; Nicolas Bergeot, Auteur Année de publication : 2010 Article en page(s) : pp 257 - 266 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] analyse comparative
[Termes IGN] Belgique
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] polyèdre
[Termes IGN] réseau géodésique localRésumé : (Auteur) This paper compares the results obtained from two homogenously reprocessed GNSS networks which are tied to a global conventional frame, namely the ITRF2005, using minimal constraints. The first network (222 stations) comprises the full EUREF Permanent Network (EPN). The second network is a smaller local network consisting of the national dense Belgian network and 38 EPN stations located in and around Belgium. We show that in reason of the network effect, it is impossible to mix the results of both cumulative solutions. Indeed, the position differences between both networks tied to the ITRF2005 using minimal constraints can reach 6.3 mm for the horizontal and 9.6 mm for the vertical. For the velocities, the differences reach 0.5 mm/yr for the horizontal and 2.4 mm/yr for the vertical. In order to mitigate these differences and to obtain a consistent set of station positions and velocities, the two solutions were combined on a weekly basis and then the combined weekly solutions were stacked to obtain a cumulative solution expressed in ITRF2005. The results demonstrate that the network effect on the local solution can be eliminated. This approach is valid thanks to the agreement between the weekly polyhedrons of both solutions as the same data analysis strategy was applied during both reprocessing. Numéro de notice : A2010-599 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31343
in Bulletin of geodesy and geomatics BGG > vol 69 n° 2 - 3 (December 2010) . - pp 257 - 266[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 013-2010021 RAB Revue Centre de documentation En réserve L003 Disponible