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Earth orientation parameters estimated from VLBI during the CONT11 campaign / Tobias Nilsson in Journal of geodesy, vol 88 n° 5 (May 2014)
[article]
Titre : Earth orientation parameters estimated from VLBI during the CONT11 campaign Type de document : Article/Communication Auteurs : Tobias Nilsson, Auteur ; Robert Heinkelmann, Auteur ; Maria Karbon, Auteur ; Virginia Raposo-Pulibo, Auteur ; Harald Schuh, Auteur Année de publication : 2014 Article en page(s) : pp 491 - 491 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] données ITGB
[Termes IGN] méthode de Monte-Carlo
[Termes IGN] orientation de la Terre
[Termes IGN] positionnement par ITGB
[Termes IGN] série temporelleRésumé : (Auteur) In this paper, we investigate the accuracy of the earth orientation parameters (EOP) estimated from the continuous VLBI campaign CONT11. We first estimated EOP with daily resolution and compared these to EOP estimated from GNSS data. We find that the WRMS differences are about 31 u as for polar motion and 7 u s for length of day. This is about the precision we could expect, based on Monte Carlo simulations and the results of the previous CONT campaigns. We also estimated EOP with hourly resolution to study the sub-diurnal variations. The results confirm the results of previous studies, showing that the current IERS model for high-frequency EOP variations does not explain all the sub-diurnal variations seen in the estimated time series. We then compared our results to various empirical high-frequency EOP models. However, we did not find that any of these gave any unambiguous improvement. Several simulations testing the impact of various aspects of, e.g. the observing network were also made. For example, we made simulations assuming that all CONT11 stations were equipped with fast VLBI2010 antennas. We found that the WRMS error decreased by about a factor five compared to the current VLBI system. Furthermore, the simulations showed that it is very important to have a homogenous global distribution of the stations for achieving the highest precision for the EOP. Numéro de notice : A2014-257 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-014-0700-5 Date de publication en ligne : 21/02/2014 En ligne : https://doi.org/10.1007/s00190-014-0700-5 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33160
in Journal of geodesy > vol 88 n° 5 (May 2014) . - pp 491 - 491[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 266-2014051 SL Revue Centre de documentation Revues en salle Disponible Generalized integer aperture estimation for partial GNSS ambiguity fixing / Andreas Brack in Journal of geodesy, vol 88 n° 5 (May 2014)
[article]
Titre : Generalized integer aperture estimation for partial GNSS ambiguity fixing Type de document : Article/Communication Auteurs : Andreas Brack, Auteur ; Christophe Günther, Auteur Année de publication : 2014 Article en page(s) : pp 479 - 490 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] ambiguïté entière
[Termes IGN] compensation Lambda
[Termes IGN] double différence
[Termes IGN] mesurage de phase
[Termes IGN] positionnement par GNSS
[Termes IGN] résolution d'ambiguïté
[Termes IGN] signal Galileo
[Termes IGN] traitement de données GNSSRésumé : (Auteur) In satellite navigation, the key to high precision is to make use of the carrier-phase measurements. The periodicity of the carrier-phase, however, leads to integer ambiguities. Often, resolving the full set of ambiguities cannot be accomplished for a given reliability constraint. In that case, it can be useful to resolve a subset of ambiguities. The selection of the subset should be based not only on the stochastic system model but also on the actual measurements from the tracking loops. This paper presents a solution to the problem of joint subset selection and ambiguity resolution. The proposed method can be interpreted as a generalized version of the class of integer aperture estimators. Two specific realizations of this new class of estimators are presented, based on different acceptance tests. Their computation requires only a single tree search, and can be efficiently implemented, e.g., in the framework of the well-known LAMBDA method. Numerical simulations with double difference measurements based on Galileo E1 signals are used to evaluate the performance of the introduced estimation schemes under a given reliability constraint. The results show a clear gain of partial fixing in terms of the probability of correct ambiguity resolution, leading to improved baseline estimates. Numéro de notice : A2014-256 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-014-0699-7 Date de publication en ligne : 18/02/2014 En ligne : https://doi.org/10.1007/s00190-014-0699-7 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33159
in Journal of geodesy > vol 88 n° 5 (May 2014) . - pp 479 - 490[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 266-2014051 SL Revue Centre de documentation Revues en salle Disponible UAV shipboard landing with RTK: a carrier phase compensates for wind and wave motion / Chiu-Jung Huang in GPS world, vol 25 n° 5 (May 2014)
[article]
Titre : UAV shipboard landing with RTK: a carrier phase compensates for wind and wave motion Type de document : Article/Communication Auteurs : Chiu-Jung Huang, Auteur ; Shau-Shiun Jan, Auteur Année de publication : 2014 Article en page(s) : pp 34 - 42 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement
[Termes IGN] compensation
[Termes IGN] drone
[Termes IGN] onde porteuse
[Termes IGN] positionnement cinématique en temps réel
[Termes IGN] précision du positionnementRésumé : (Auteur) Limited landing area as well as interference due to wind disturbance and wave motion make landings of unmanned aerial vehicles (UAVs) extremely difficult. Use of UAVs at sea enhance the efficiency of intelligence gathering and surveillance, and could also increase long-range air-strike capability. To successfully land aircraft in such a challenging environment requires a high-precision navigation system; this prototype applies RTK measurements. Numéro de notice : A2014-204 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33107
in GPS world > vol 25 n° 5 (May 2014) . - pp 34 - 42[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 067-2014051 RAB Revue Centre de documentation En réserve L003 Disponible Dynamic modeling of GNSS troposphere wet delay for estimation of precipitable water vapour / Ahmed El-Mowafy in Journal of applied geodesy, vol 8 n° 1 (April 2014)
[article]
Titre : Dynamic modeling of GNSS troposphere wet delay for estimation of precipitable water vapour Type de document : Article/Communication Auteurs : Ahmed El-Mowafy, Auteur ; Johnny Lo, Auteur Année de publication : 2014 Article en page(s) : pp 31 - 42 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] autocorrélation
[Termes IGN] humidité de l'air
[Termes IGN] modèle dynamique
[Termes IGN] positionnement par GNSS
[Termes IGN] précipitation
[Termes IGN] propagation troposphérique
[Termes IGN] signal GNSS
[Termes IGN] vapeur d'eauRésumé : (Auteur) Proper dynamic modelling of the troposphere wet delay using the Global Navigation Satellite Systems (GNSS) measurements is important in precise point positioning and in estimation of the Precipitable Water Vapour (PWV) for weather forecast. The random walk (RW) and the first-order Gauss-Markov (GM) autocorrelation models are commonly used for this purpose. However, it was found that these models consistently underestimate the temporal correlations that exist among the troposphere wet delay. Therefore, a new dynamic model is proposed. The performance of the proposed model in following the autocorrelation of actual data is demonstrated and its impact on the near-real time estimation of the wet delay was tested and compared to that of the GM and RW models. Results showed that the proposed model outperformed these models. When the computed wet delays were used to compute PWV, their estimated valueswere very close to actual PWV data measured by radiosonde with differences less than 1 mm. Numéro de notice : A2014-271 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1515/jag-2013-0012 2 2 total citations on Dimensions. Date de publication en ligne : 08/04/2014 En ligne : https://doi.org/10.1515/jag-2013-0012 2 2 total citations on Dimensions. Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33174
in Journal of applied geodesy > vol 8 n° 1 (April 2014) . - pp 31 - 42[article]Expert advice: Common standards for GPS workflows / Mike Botts in GPS world, vol 25 n° 4 (April 2014)
[article]
Titre : Expert advice: Common standards for GPS workflows Type de document : Article/Communication Auteurs : Mike Botts, Auteur Année de publication : 2014 Article en page(s) : pp 10 - 13 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] données GPS
[Termes IGN] interopérabilité
[Termes IGN] normalisation
[Termes IGN] positionnement par GPS
[Termes IGN] précision du positionnement
[Termes IGN] Sensor Web Enablement
[Termes IGN] standard OGCRésumé : (Auteur) (Conclusion) [...] A common standards framework for all data filed and stream within the GPS system would significantly improve interoperability between data centers, processing and users tools. [...] Numéro de notice : A2014-196 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33099
in GPS world > vol 25 n° 4 (April 2014) . - pp 10 - 13[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 067-2014041 RAB Revue Centre de documentation En réserve L003 Disponible GNSS antenna array-aided CORS ambiguity resolution / Bofeng Li in Journal of geodesy, vol 88 n° 4 (April 2014)PermalinkGround-based augmentation: Combining Galileo with GPS and Glonass? / Mirko Stanisak in GPS world, vol 25 n° 4 (April 2014)PermalinkInstantaneous BeiDou+GPS RTK positioning with high cut-off elevation angles / Peter J.G. Teunissen in Journal of geodesy, vol 88 n° 4 (April 2014)PermalinkLe positionnement par satellites et les coordonnées / Jonathan Chenal in Tangente, n° 157 (mars-avril 2014)PermalinkReconstruct street network from imprecise excavation data using fuzzy Hough transforms / Cyril de Runz in Geoinformatica, vol 18 n° 2 (April 2014)PermalinkAlgerian augmentation positioning system (SAAP) / Hassen Abdellaoui in Bulletin des sciences géographiques, n° 29 (janvier - juin 2014)PermalinkLong-term vertical land motion from double-differenced tide gauge and satellite altimetry data / Alvaro Santamaria Gomez in Journal of geodesy, vol 88 n° 3 (March 2014)PermalinkOceanwide precise determination of sea surface height from in-situ measurements on cargo ships / Ole Roggenbuck in Marine geodesy, vol 37 n° 1 (March - May 2014)PermalinkLe positionnement par satellite : les nouveaux récepteurs améliorent-ils les performances sous couvert forestier ? / Alain Munoz in Rendez-vous techniques, n° 43 (Mars 2014)PermalinkPermalink