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Deploying a Locata network to enable precise positioning in urban canyons / J.P. Montillet in Journal of geodesy, vol 83 n° 2 (February 2009)  

Public [article]  inJournal of geodesy > vol 83 n° 2 (February 2009) . - pp 91 - 103 Titre : Deploying a Locata network to enable precise positioning in urban canyons Type de document : Article/Communication Auteurs : J.P. Montillet, Auteur ; Gethin W. Roberts, Auteur ; Craig M. Hancock, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : pp 91 - 103 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement [Termes IGN] canyon urbain [Termes IGN] GPS en mode cinématique [Termes IGN] milieu urbain [Termes IGN] positionnement cinématique en temps réel [Termes IGN] propagation du signal [Termes IGN] WiFi Résumé : (Auteur) Locata is a new positioning technology developed by the Locata Corporation. At the beginning of 2007, the Institute of Engineering Surveying and Space Geodesy (IESSG) bought and received a network of Locata transceivers with two rovers. The purpose is to solve the challenges identified when surveying in dense multipath areas (i.e. urban canyons). In this paper, the technology is tested in an urban canyon scenario on the University park at the University of Nottingham. By comparing Locata position solutions with the true positions calculated with a total station and a carrier-phase GPS, the results show that centimetre-level accuracy is achievable in difficult environments in the presence of Wi-Fi signals. The rover’s estimated coordinates may diverge in some cases. Finally, a comparison study shows that Real Time Kinematic GPS and Locata technologies have similar accuracy when both are available. Copyright Springer Numéro de notice : A2009-188 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-008-0236-7 En ligne : https://doi.org/10.1007/s00190-008-0236-7 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29818 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
266-09021	SL	Revue	Centre de documentation	Revues en salle	Disponible

A seafloor experiment to monitor vertical deformation at the Lucky Strike volcano, Mid-Atlantic Ridge / Marie-Noëlle Bouin in Journal of geodesy, vol 83 n° 2 (February 2009)  

Public [article]  inJournal of geodesy > vol 83 n° 2 (February 2009) . - pp 147 - 159 Titre : A seafloor experiment to monitor vertical deformation at the Lucky Strike volcano, Mid-Atlantic Ridge Type de document : Article/Communication Auteurs : Marie-Noëlle Bouin , Auteur ; V. Ballut, Auteur ; Jérôme Ammann, Auteur ; O. Pot, Auteur ; Olivier de Viron, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : pp 147 - 159 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale [Termes IGN] Atlantique (océan) [Termes IGN] déformation verticale de la croute terrestre [Termes IGN] dorsale [Termes IGN] fond marin [Termes IGN] surveillance géologique [Termes IGN] volcan Résumé : (Auteur) Decades of cruise-based exploration have provided excellent snapshots of the structure of mid-ocean ridges and have revealed that accretion is a mixture of steady-state and quantum events. Observatory-type studies are now needed to quantify the temporal evolution of these systems. A multi-disciplinary seafloor observatory site is currently being set up at the Lucky Strike volcano, in the axial valley of the slow spreading Mid-Atlantic ridge as a part of the MoMAR (monitoring of the Mid-Atlantic Ridge) initiative. The aim of this observatory is to better understand the dynamics of the volcano and the hydrothermal vents hosted at its summit as well as their plumbing systems. In August 2006, the GRAVILUCK cruise initiated an experiment to monitor the deformation of Lucky Strike volcano. A geodetic network was installed, and seafloor pressure, gravity and magnetic data were collected. In this paper, we present the method used to monitor volcanic deformation, which involves measuring relative depth difference between points within a seafloor geodesy network. We show that, taking into account oceanographic variability and measurement noise, the network should be able to detect vertical deformations of the order of 1 cm. Copyright Springer Numéro de notice : A2009-189 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-008-0248-3 En ligne : https://doi.org/10.1007/s00190-008-0248-3 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29819 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
266-09021	SL	Revue	Centre de documentation	Revues en salle	Disponible