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Improvement of GPS/acoustic seafloor positioning precision through controlling the ship’s track line / M. Sato in Journal of geodesy, vol 87 n° 9 (September 2013)  

Public [article]  inJournal of geodesy > vol 87 n° 9 (September 2013) . - pp 825 - 842 Titre : Improvement of GPS/acoustic seafloor positioning precision through controlling the ship’s track line Type de document : Article/Communication Auteurs : M. Sato, Auteur ; M. Fujita, Auteur ; Y. Matsumoto, Auteur ; et al., Auteur Année de publication : 2013 Article en page(s) : pp 825 - 842 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement [Termes IGN] bathymétrie acoustique [Termes IGN] cable [Termes IGN] fond marin [Termes IGN] GPS assisté pour la navigation (technologies) [Termes IGN] Japon [Termes IGN] lever bathymétrique [Termes IGN] navigation maritime [Termes IGN] navire [Termes IGN] positionnement par GPS [Termes IGN] précision du positionnement [Termes IGN] sondeur acoustique Résumé : (Auteur) The precision of GPS/acoustic seafloor positioning was improved by introducing a hull-mounted onboard system in March 2008, which allows us to conduct acoustic ranging measurements with the vessel sailing along the pre-determined track lines, while the early system before 2008 could only adopt the uncontrollable drifting observation. The continuity of the positioning results due to the transition was first confirmed through the comparison between results from sailing and drifting observations conducted in parallel. Using the data acquired for about 3 years since 2008, the repeatability of the determined position for the sailing observation was evaluated to be about 2 cm in root mean squares in the horizontal component, significantly better than that for the early drifting observation. The improvement of positioning precision probably resulted from the improvement of geometric distribution of acoustic ranging data by controlling the track lines. It was also shown that the sailing observation allows to obtain reliable results with a smaller amount of data. Comparison between the results in different sea regions suggests that positioning precision is better in the region along the Nankai Trough than in the region along the Japan Trench, probably because of the complicated acoustic velocity structure of seawater often observed in the latter. Furthermore, the precision of height determination was also improved, which leads us to expect that vertical crustal movement will be detectable in the future through accumulation of data as well as further technology development. Numéro de notice : A2013-564 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-013-0649-9 Date de publication en ligne : 02/07/2013 En ligne : https://doi.org/10.1007/s00190-013-0649-9 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32700 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
266-2013091	SL	Revue	Centre de documentation	Revues en salle	Disponible

Place-tagged podcasts with synchronized maps on mobile media players / M. Arikawa in Cartography and Geographic Information Science, vol 34 n° 4 (October 2007)  

Public [article]  inCartography and Geographic Information Science > vol 34 n° 4 (October 2007) . - pp 293 - 303 Titre : Place-tagged podcasts with synchronized maps on mobile media players Type de document : Article/Communication Auteurs : M. Arikawa, Auteur ; K. Tsuruoka, Auteur ; M. Fujita, Auteur ; A. Ome, Auteur Année de publication : 2007 Article en page(s) : pp 293 - 303 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie numérique [Termes IGN] géonavigateur [Termes IGN] positionnement cinématique en temps réel [Termes IGN] représentation mentale spatiale Résumé : (Auteur) PodWalks are a new kind of Podcasts where virtual narrators guide users through real-world spaces. PodWalks can increase a user's appreciation of real spaces by connecting them to audio tours stored on portable media players that can be listened to any time and anywhere without using mobile telecommunication services. One disadvantage of PodWalks is that it can be difficult for listeners to synchronize their locations with the location that the narrator is describing and, as a result, listeners become disoriented. To solve this problem we propose a new framework—maPodWalks—as an extension to PodWalks which provides maps that are synchronized to the narrations on mobile media players. By forming linkages between virtual and real-world experiences, maPodWalks help users develop mental maps of places of interest. In this paper, we discuss the characteristics of maPodWalks and present a prototype maPodWalk Maker that allows users to easily create geocoded audio tours. The results of system tests comparing the performance of PodWalks and maPodWalks are reported as well. Numéro de notice : A2007-434 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1559/152304007782382945 En ligne : https://doi.org/10.1559/152304007782382945 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28797 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-07041	RAB	Revue	Centre de documentation	En réserve L003	Disponible

SIR-B image calibration by corner reflector array / M. Fujita in International Journal of Remote Sensing IJRS, vol 9 n° 5 (May 1988)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 9 n° 5 (May 1988) . - pp 849 - 856 Titre : SIR-B image calibration by corner reflector array Type de document : Article/Communication Auteurs : M. Fujita, Auteur ; H. Naito, Auteur ; N. Fugono, Auteur Année de publication : 1988 Article en page(s) : pp 849 - 856 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] coin réflecteur [Termes IGN] étalonnage de capteur (imagerie) [Termes IGN] image SIR-B [Termes IGN] Japon Numéro de notice : A1988-172 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431168808954900 En ligne : https://doi.org/10.1080/01431168808954900 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=24751 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
080-88051	RAB	Revue	Centre de documentation	En réserve L003	Disponible