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Dépouillements

Development of new hybrid geoid model for Japan, "GSIGEO2011" / Basara Miyahara in Bulletin of the GeoSpatial Information authority of Japan, vol 62 (December 2014)  

Public [article]  inBulletin of the GeoSpatial Information authority of Japan > vol 62 (December 2014) . - pp 11 - 20 Titre : Development of new hybrid geoid model for Japan, "GSIGEO2011" Type de document : Article/Communication Auteurs : Basara Miyahara, Auteur ; Tokuro Kodama, Auteur ; Yuki Kuroishi, Auteur Année de publication : 2014 Article en page(s) : pp 11 - 20 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique [Termes IGN] altitude orthométrique [Termes IGN] collocation par moindres carrés [Termes IGN] géoïde gravimétrique [Termes IGN] géoïde local [Termes IGN] nivellement [Termes IGN] positionnement par GNSS Résumé : (auteur) We have developed a new hybrid geoid model of Japan, “GSIGEO2011”, which was made publicly available on April 1, 2014. The model was created in such a way that a high-resolution gravimetric geoid model for Japan, “JGEOID2008” was fitted to GNSS/leveling geoid undulations at 971 sites by the Least-Squares Collocation method. The model reproduces geoid heights at the GNSS/leveling sites with the consistency of a standard deviation of 1.8 cm. By utilizing the model to convert GNSS-derived three-dimensional positions to orthometric heights, GNSS survey can determine orthometric heights at the same precision as third-order leveling surveys. Orthometric height determination by GNSS surveying has been applicable in public surveys as alternative to third-order leveling in Japan since April 1 2014. Numéro de notice : A2014-706 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans En ligne : https://www.gsi.go.jp/common/000099005.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=75516 [article]

Displacement and maintenance of control points at Okinotorishima Island on Philippine Sea / Yudai Sato in Bulletin of the GeoSpatial Information authority of Japan, vol 62 (December 2014)  

Public [article]  inBulletin of the GeoSpatial Information authority of Japan > vol 62 (December 2014) . - pp 27 - 32 Titre : Displacement and maintenance of control points at Okinotorishima Island on Philippine Sea Type de document : Article/Communication Auteurs : Yudai Sato, Auteur ; Hiroki Muramatsu, Auteur ; et al., Auteur Année de publication : 2014 Article en page(s) : pp 27 - 32 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale [Termes IGN] déformation de la croute terrestre [Termes IGN] GAMIT [Termes IGN] Pacifique (océan) [Termes IGN] point de vérification [Termes IGN] positionnement par GPS [Termes IGN] surveillance géologique [Termes IGN] tectonique des plaques Résumé : (auteur) Okinotorishima Island is the southern most island of Japan, located on the Philippine Sea plate. On the island, Geospatial Information Authority of Japan (GSI) set triangulation points and a GPS continuous observation station in 1989 and 2005, respectively, and has conducted GPS surveys since 1992 for surveying and crustal deformation monitoring. This report describes the displacement of Okinotorishima Island from 2005 to 2013 as a result of re-analyzing GPS data using GAMIT software. The displacement suggests that Okinotorishima Island has moved WNW at Vns = +21.6 mm/year and Vew = -58.0 mm/year, or moved N66.8°W at 61.9 mm/year. The rate of collection of data at the island is lower than that of the GSI’s other GNSS stations because the station is an extremely isolated island in the Pacific Ocean. In order to monitor the movement of Philippine Sea plate, it is necessary to continue the maintenance of observation devices and enhance the station’s data availability. Numéro de notice : A2014-707 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans En ligne : https://www.gsi.go.jp/common/000099007.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=75518 [article]