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Amundsen Sea bathymetry: the benefits of using gravity data for bathymetric prediction / M. Mcmillan in IEEE Transactions on geoscience and remote sensing, vol 47 n° 12 Tome 2 (December 2009)
[article]
Titre : Amundsen Sea bathymetry: the benefits of using gravity data for bathymetric prediction Type de document : Article/Communication Auteurs : M. Mcmillan, Auteur ; A. Sheperd, Auteur ; D. Vaughan, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : pp 4223 - 4228 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bathymétrie
[Termes IGN] Amundsen, mer d'
[Termes IGN] Arctique, océan
[Termes IGN] données altimétriques
[Termes IGN] fond marin
[Termes IGN] gravimétrie en mer
[Termes IGN] image ERS
[Termes IGN] levé gravimétrique
[Termes IGN] méthode de Monte-Carlo
[Termes IGN] plateau continental
[Termes IGN] prédiction
[Termes IGN] profondeurRésumé : (Auteur) Bathymetric charts are essential for modeling oceanic processes, yet, in remote areas, direct measurements of seafloor depth are often scarce. It is possible to augment sparse depth soundings with dense satellite-derived gravity data to provide additional bathymetric detail in regions devoid of sounding data. We demonstrate this method by using marine gravity derived from the European Remote Sensing (ERS-1) satellite altimeter, combined with depth soundings, to form a bathymetric prediction of the Amundsen Sea, West Antarctica. We estimate the root mean square error of depth estimates at unsurveyed locations in our solution to be ~120 m. We use a Monte Carlo method to assess the value of gravity as a bathymetric predictor in sparsely surveyed regions by comparing our solution to predictions formed from depth soundings alone. When less than ~11% of 10-km grid cells contain depth soundings, inclusion of gravity data improves the depth accuracy of the solution by up to 17%, as compared to a minimum curvature surface interpolation of the depth soundings alone. When depth data are sparse, our gravity-derived prediction reveals additional short-wavelength bathymetric features, such as troughs on the continental shelf, which are not resolved by interpolations of the depth soundings alone. Copyright IEEE Numéro de notice : A2009-493 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2009.2023665 En ligne : https://doi.org/10.1109/TGRS.2009.2023665 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30122
in IEEE Transactions on geoscience and remote sensing > vol 47 n° 12 Tome 2 (December 2009) . - pp 4223 - 4228[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-09121B RAB Revue Centre de documentation En réserve L003 Disponible National report of France [to the Symposium of the IAG Subcommission 1.3A Europe (EUREF) held in London 6-9 June 2007] / Françoise Duquenne (01/12/2009)
contenu dans Report on the Symposium of the IAG Subcommission 1.3A Europe (EUREF) held in London 6-9 June 2007 & reports of the EUREF technical working group (TWG), EUREF publication n° 17 / Joao Agria Torres (2009)
Titre : National report of France [to the Symposium of the IAG Subcommission 1.3A Europe (EUREF) held in London 6-9 June 2007] Type de document : Article/Communication Auteurs : Françoise Duquenne , Auteur ; Alain Harmel, Auteur ; Henri Duquenne (1948-2010) , Auteur ; Bruno Garayt , Auteur Editeur : Francfort sur le Main : Bundesamt für Kartographie und Geodäsie Année de publication : 01/12/2009 Conférence : EUREF 2007, Symposium of the IAG sub-commission 1.3A Europe 06/06/2007 09/06/2007 Londres Royaume-Uni OA proceedings Importance : pp 220 - 223 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] gravimétrie
[Termes IGN] réseau de détail français
[Termes IGN] Réseau Géodésique Français
[Termes IGN] réseau géodésique permanent
[Termes IGN] TeriaRésumé : (Auteur) (introduction) The number of permanent stations in the RGP was considerably increased with 51 new stations last year. At the beginning of June 2007, the RGP consisted of 114 stations among which 104 stations freely deliver hourly, 1 s rate RINEX files online. The 10 other stations deliver daily, 30s rate files. The constitution of this network is based on a wide partnership between the IGN, public institutions (universities, research laboratories, urban communities, etc...) and private companies, especially RTK networks managers. The consequent increase of the number of stations is mainly due to the development of the partnership with the private network TERIA.
(Auteur) (introduction) The number of permanent stations in the RGP was considerably increased with 51 new stations last year. At the beginning of June 2007, the RGP consisted of 114 stations among which 104 stations freely deliver hourly, 1 s rate RINEX files online. The 10 other stations deliver daily, 30s rate files. The constitution of this network is based on a wide partnership between the IGN, public institutions (universities, research laboratories, urban communities, etc...) and private companies, especially RTK networks managers. The consequent increase of the number of stations is mainly due to the development of the partnership with the private network TERIA.Numéro de notice : C2007-003 Affiliation des auteurs : LAREG (1991-2011) Thématique : POSITIONNEMENT Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : sans En ligne : http://www.euref.eu/symposia/2007London/07-09-duquenne.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=65034 vol 86 n° 1 - 01/12/2009 - Proceedings of the EGU G16 symposium "Geodetic and geodynamic programmes of the central Europe initiative", [actes], Vienna, 19 - 24 April 2009 (Bulletin de Reports on geodesy) / J. Sledzinski
[n° ou bulletin]
est un bulletin de Reports on geodesy / Instytut geodezji wyzszej i astronomii geodezyjnej (1984 - 2012)
Titre : vol 86 n° 1 - 01/12/2009 - Proceedings of the EGU G16 symposium "Geodetic and geodynamic programmes of the central Europe initiative", [actes], Vienna, 19 - 24 April 2009 Type de document : Périodique Auteurs : J. Sledzinski, Éditeur scientifique ; Warsaw university of technology, Auteur Année de publication : 2009 Conférence : EGU 2009, G16 symposium "Geodetic and geodynamic programmes of the central Europe initiative" 19/04/2009 24/04/2009 Vienne Autriche OA proceedings Importance : 128 p. Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] antenne GPS
[Termes IGN] gravimétrie
[Termes IGN] Roumanie
[Termes IGN] surveillance
[Termes IGN] système de référence géodésiqueNuméro de notice : 225-200901 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Numéro de périodique Permalink : https://documentation.ensg.eu/index.php?lvl=bulletin_display&id=15953 [n° ou bulletin]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 225-2009011 RAB Revue Centre de documentation En réserve L003 Disponible The GHYRAF (Gravity and Hydrology in Africa) experiment: Description and first results / Jacques Hinderer in Journal of geodynamics, vol 48 n° 3-5 (December 2009)
[article]
Titre : The GHYRAF (Gravity and Hydrology in Africa) experiment: Description and first results Type de document : Article/Communication Auteurs : Jacques Hinderer, Auteur ; Caroline de Linage, Auteur ; Jean-Paul Boy, Auteur ; et al., Auteur ; Olivier Bock , Auteur Année de publication : 2009 Article en page(s) : pp 172 - 181 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] Afrique occidentale
[Termes IGN] gravimétrie
[Termes IGN] hydrologie
[Termes IGN] modèle hydrographique
[Termes IGN] mousson
[Termes IGN] SahelRésumé : (auteur) This paper is the first presentation of a project called GHYRAF (Gravity and Hydrology in Africa) devoted to the detailed comparison between models and multidisciplinary observations (ground and satellite gravity, geodesy, hydrology, meteorology) of the variations of water storage in Africa from the Sahara arid part to the monsoon equatorial part. We describe the various actions planned in this project. We first detail the actions planned in gravimetry which consist in two main surface gravity experiments: on the one hand the periodic repetition of absolute gravity measurements along a north–south monsoonal gradient of rainfall in West Africa, going from Tamanrasset (20 mm/year) in southern Algeria to Djougou (1200 mm/year) in central Benin; on the other hand the continuous measurements at Djougou (Benin) with a superconducting gravimeter to monitor with a higher sampling rate the gravity changes related to an extreme hydrological cycle. Another section describes the actions planned in GPS which will maintain and develop the present-day existing network in West Africa. The third type of actions deals with hydrology and we review the three sites that will be investigated in this joint hydrogeophysics project namely Wankama (near Niamey) and Bagara (near Diffa) in the Niger Sahelian zone and Nalohou (near Djougou) in the Benin monsoon zone. We also address the question of the ground truth of satellite-derived missions; in this context the GHYRAF project will lead to test the hydrology models by comparison both with in situ and satellite data such as GRACE, as well as to an important increase of our knowledge of the seasonal water cycle in Africa. We finally present preliminary results in GPS based on the analysis of the vertical motion of the Djougou site. The resulting absolute gravity changes related to the 2008 monsoon are finally given. Numéro de notice : A2009-584 Affiliation des auteurs : IGN+Ext (1940-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.jog.2009.09.014 Date de publication en ligne : 03/10/2009 En ligne : https://doi.org/10.1016/j.jog.2009.09.014 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=89894
in Journal of geodynamics > vol 48 n° 3-5 (December 2009) . - pp 172 - 181[article]Using gravity and topography-implied anomalies to assess data requirements for precise geoid computation / Christopher Jekeli in Journal of geodesy, vol 83 n° 12 (December 2009)
[article]
Titre : Using gravity and topography-implied anomalies to assess data requirements for precise geoid computation Type de document : Article/Communication Auteurs : Christopher Jekeli, Auteur ; H. Yang, Auteur ; J.H. Kwong, Auteur Année de publication : 2009 Article en page(s) : pp 1193 - 1202 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] anomalie de pesanteur
[Termes IGN] cohérence des données
[Termes IGN] Corée du sud
[Termes IGN] corrélation
[Termes IGN] géoïde gravimétrique
[Termes IGN] géoïde local
[Termes IGN] intégrale de Stokes
[Termes IGN] levé gravimétrique
[Termes IGN] nivellement par GPS
[Termes IGN] pesanteur terrestre
[Termes IGN] topographie localeRésumé : (Auteur) Many regions around the world require improved gravimetric data bases to support very accurate geoid modeling for the modernization of height systems using GPS. We present a simple yet effective method to assess gravity data requirements, particularly the necessary resolution, for a desired precision in geoid computation. The approach is based on simulating high-resolution gravimetry using a topography-correlated model that is adjusted to be consistent with an existing network of gravity data. Analysis of these adjusted, simulated data through Stokes’s integral indicates where existing gravity data must be supplemented by new surveys in order to achieve an acceptable level of omission error in the geoid undulation. The simulated model can equally be used to analyze commission error, as well as model error and data inconsistencies to a limited extent. The proposed method is applied to South Korea and shows clearly where existing gravity data are too scarce for precise geoid computation. Copyright Springer Numéro de notice : A2009-478 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-009-0337-y Date de publication en ligne : 20/08/2009 En ligne : https://doi.org/10.1007/s00190-009-0337-y Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30107
in Journal of geodesy > vol 83 n° 12 (December 2009) . - pp 1193 - 1202[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 266-09111 SL Revue Centre de documentation Revues en salle Disponible Wavelet modeling of the gravity field over Japan / Isabelle Panet in Bulletin of the Geographical survey institute, vol 57 (December 2009)PermalinkGeoid and high resolution sea surface topography modelling in the mediterranean from gravimetry, altimetry and GOCE data: evaluation by simulation / R. Barzaghi in Journal of geodesy, vol 83 n° 8 (August 2009)PermalinkGravity gradient modeling using gravity and DEM / L. Zhu in Journal of geodesy, vol 83 n° 6 (June 2009)PermalinkRelative gravity measurement campaign during the 7th international comparison of absolute gravimeters (2005) / Z. Jiang in Metrologia, vol 46 n° 3 (June 2009)PermalinkThe determination of potential difference by the joint application of measured and synthetical gravity data: a case study in Hungary / G. Papp in Journal of geodesy, vol 83 n° 6 (June 2009)PermalinkGlobal geodetic observing system for geohazards and global change / Hans-Peter Plag in Géosciences, n° 9 (avril 2009)PermalinkObservation des eaux continentales depuis l'espace / Anny Cazenave in Géosciences, n° 9 (avril 2009)PermalinkLes marées terrestres, la dynamique du manteau et la sismicité / Laurent Métivier in Géomatique expert, n° 67 (01/02/2009)PermalinkOptima multi-step collocation: application to the space-wise approach for GOCE data analysis / M. Reguzzoni in Journal of geodesy, vol 83 n° 1 (January 2009)PermalinkRapport du directeur sur l'activité et la gestion du Bureau international des poids et mesures (BIPM), 1er juillet 2008 - 30 juin 2009 / Bureau international des poids et mesures (2009)Permalink