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The effect of EGM2008-based normal, normal-orthometric and Helmert orthometric height systems on the Australian levelling network / M. Filmer in Journal of geodesy, vol 84 n° 8 (August 2010)
[article]
Titre : The effect of EGM2008-based normal, normal-orthometric and Helmert orthometric height systems on the Australian levelling network Type de document : Article/Communication Auteurs : M. Filmer, Auteur ; Will E. Featherstone, Auteur ; M. Kuhn, Auteur Année de publication : 2010 Article en page(s) : pp 501 - 513 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] altitude
[Termes IGN] altitude orthométrique
[Termes IGN] Australian Height Datum
[Termes IGN] Australie
[Termes IGN] correction orthométrique
[Termes IGN] Earth Gravity Model 2008
[Termes IGN] réseau altimétrique national
[Termes IGN] système de référence altimétriqueRésumé : (Auteur) This paper investigates the normal-orthometric correction used in the definition of the Australian Height Datum, and also computes and evaluates normal and Helmert orthometric corrections for the Australian National Levelling Network (ANLN). Testing these corrections in Australia is important to establish which height system is most appropriate for any new Australian vertical datum. An approximate approach to assigning gravity values to ANLN benchmarks (BMs) is used, where the EGM2008-modelled gravity field is used to ‘re-construct’ observed gravity at the BMs. Network loop closures (for first- and second-order levelling) indicate reduced misclosures for all height corrections considered, particularly in the mountainous regions of south eastern Australia. Differences between Helmert orthometric and normal-orthometric heights reach 44 cm in the Australian Alps, and differences between Helmert orthometric and normal heights are about 26 cm in the same region. Normal-orthometric heights differ from normal heights by up to 18 cm in mountainous regions >2,000 m. This indicates that the quasigeoid is not compatible with normal-orthometric heights in Australia. Numéro de notice : A2010-441 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-010-0388-0 Date de publication en ligne : 11/06/2010 En ligne : https://doi.org/10.1007/s00190-010-0388-0 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30634
in Journal of geodesy > vol 84 n° 8 (August 2010) . - pp 501 - 513[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 266-2010081 SL Revue Centre de documentation Revues en salle Disponible Evaluating terrestrial water storage variations from regionally constrained GRACE mascon data and hydrological models over Southern Africa: preliminary results / P. Krogh in International Journal of Remote Sensing IJRS, vol 31 n° 14 (July 2010)
[article]
Titre : Evaluating terrestrial water storage variations from regionally constrained GRACE mascon data and hydrological models over Southern Africa: preliminary results Type de document : Article/Communication Auteurs : P. Krogh, Auteur ; O. Andersen, Auteur ; C. Michailovsky, Auteur ; et al., Auteur Année de publication : 2010 Article en page(s) : pp 3899 - 3912 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] Afrique du sud (état)
[Termes IGN] champ de pesanteur local
[Termes IGN] données GRACE
[Termes IGN] Malawi
[Termes IGN] modèle hydrographique
[Termes IGN] ressources en eau
[Termes IGN] variable régionalisée
[Termes IGN] variationRésumé : (Auteur) A concentration of surface mass has a distinct, localized signature in Gravity Recovery and Climate Experiment (GRACE) K-band range rate (KBRR) data. This fact is exploited in the regional solutions for mass concentration parameters (mascons) made at the Goddard Space Flight Center (GSFC). In this paper we explore an experimental set of regionally constrained mascon blocks over Southern Africa where a system of 1.25° times 1.5° and 1.5° times 1.5° blocks has been designed. The blocks are divided into hydrological regions based on drainage patterns of the largest river basins, and are constrained in different ways. We show that the use of regional constraints, when solving mascon parameters of different hydrological regions independently, yields more detail and variation than comparable spherical harmonic solutions and mascon solutions using isotropic constraints. We validate our results over Lake Malawi with water level from altimetry. Results show that weak constraints across regions in addition to intra-regional constraints are necessary, to reach reasonable mass variations. Numéro de notice : A2010-372 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431161.2010.483483 En ligne : https://doi.org/10.1080/01431161.2010.483483 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30566
in International Journal of Remote Sensing IJRS > vol 31 n° 14 (July 2010) . - pp 3899 - 3912[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 080-2010091 RAB Revue Centre de documentation En réserve L003 Exclu du prêt Characterizing long‐time scale hydrological effects on gravity for improved distinction of tectonic signals / Michel Van Camp in Journal of geophysical research : Solid Earth, Vol 115 n° B7 (July 2010)
[article]
Titre : Characterizing long‐time scale hydrological effects on gravity for improved distinction of tectonic signals Type de document : Article/Communication Auteurs : Michel Van Camp, Auteur ; Laurent Métivier , Auteur ; Olivier de Viron, Auteur ; Bruno Meurers, Auteur ; Simon D.P. Williams, Auteur Année de publication : 2010 Article en page(s) : 10 p. Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] pesanteur terrestre
[Termes IGN] surcharge hydrologique
[Termes IGN] tectoniqueNuméro de notice : A2010-646 Affiliation des auteurs : LAREG+Ext (1991-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1029/2009JB006615 Date de publication en ligne : 16/07/2010 En ligne : https://doi.org/10.1029/2009JB006615 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=90746
in Journal of geophysical research : Solid Earth > Vol 115 n° B7 (July 2010) . - 10 p.[article]Documents numériques
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Characterizing long‐time scale hydrological effects ... - pdf éditeurAdobe Acrobat PDF Generation and study of satellite gravity over Gujarat, India and their possible correlation with earthquake occurences / T. Majumba in Geocarto international, vol 25 n° 4 (July 2010)
[article]
Titre : Generation and study of satellite gravity over Gujarat, India and their possible correlation with earthquake occurences Type de document : Article/Communication Auteurs : T. Majumba, Auteur ; R. Bhattacharyya, Auteur Année de publication : 2010 Article en page(s) : pp 269 - 280 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] anomalie de pesanteur
[Termes IGN] champ de pesanteur local
[Termes IGN] corrélation
[Termes IGN] données GRACE
[Termes IGN] épicentre
[Termes IGN] Inde
[Termes IGN] levé gravimétrique
[Termes IGN] risque naturel
[Termes IGN] séismeRésumé : (Auteur) High-resolution satellite gravity data have been generated and utilized to infer subsurface geological structures in the area of devastating earthquake that struck the Bhuj region in Gujarat on 26 January 2001. Latitudinal gravity profiles have been generated in the Bhuj, Anjar and IBF regions across the epicentres (23.5° N, 69.8° E/Mw 7.0 in 2001; 23.2° N, 70° E/Mw 7.0 in 1956; 24.2° N, 69.2° E/Mw 7.8 in 1819). Substantial differences in gravity anomaly patterns as high as 37 mGal could be observed existing near the epicentre regions. These gravitational differences might have caused due to the plate tectonic processes and due to the changes in densities of different lithospheric zones/sedimentary layers. Temporal variations of the satellite-derived gravity and their probable relations with already occurred major earthquakes in this region have been studied. Hence we conclude that drastic changes in gravity anomalies can be considered as a precursor for occurrences of substantially large earthquakes. Numéro de notice : A2010-278 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106040903486148 Date de publication en ligne : 09/04/2010 En ligne : https://doi.org/10.1080/10106040903486148 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30472
in Geocarto international > vol 25 n° 4 (July 2010) . - pp 269 - 280[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 059-2010041 RAB Revue Centre de documentation En réserve L003 Disponible Can mean values of Helmert's gravity anomalies be continued downward directly? / Petr Vanicek in Geomatica, vol 64 n° 2 (June 2010)
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Titre : Can mean values of Helmert's gravity anomalies be continued downward directly? Type de document : Article/Communication Auteurs : Petr Vanicek, Auteur ; Marcelo C. Santos, Auteur Année de publication : 2010 Article en page(s) : pp 245 - 251 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] anomalie de pesanteur
[Termes IGN] géoïde gravimétrique
[Termes IGN] problème des valeurs limites
[Termes IGN] problème inverse
[Termes IGN] valeur moyenneRésumé : (Auteur) The computation of a precise gravimetric geoid based on the Stokes-Helmert approach requires the solution of the geodetic boundary value problem. For that, the mean Helmert’s gravity anomaly on the earth’s topographic surface must be reduced to the geoid, the surface that plays the role of the boundary. This reduction is a process known as downward continuation. This paper considers the downward continuation as a solution of the discrete inverse Poisson problem. It shows the derivation of a doubly-averaged upward continuation operator that relates mean Helmert’s gravity anomaly from the boundary to the surface. Downward continuation is then carried out by the inversion of this operator. It is shown that this can be done rigorously if, and only if, the processes of averaging and downward continuation are commutative (mutually interchangeable). Numéro de notice : A2010-388 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.5623/geomat-2010-0024 En ligne : https://cdnsciencepub.com/doi/abs/10.5623/geomat-2010-0024 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30582
in Geomatica > vol 64 n° 2 (June 2010) . - pp 245 - 251[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 035-2010021 RAB Revue Centre de documentation En réserve L003 Disponible Ocean loading effects on the prediction of Antarctic glacial isostatic uplift and gravity rates / K. Simon in Journal of geodesy, vol 84 n° 5 (May 2010)PermalinkIGN : entre recherche et développement / Françoise de Blomac in SIG la lettre, n° 116 (avril 2010)PermalinkConstruction of spherical harmonic series for the potential derivatives of arbitrary orders in the geocentric Earth-fixed reference frame / M. Petrovskaya in Journal of geodesy, vol 84 n° 3 (March 2010)PermalinkPrediction of vertical deflections from high-degree spherical harmonic synthesis and residual terrain model data / C. Hirt in Journal of geodesy, vol 84 n° 3 (March 2010)PermalinkL'altitude : une question de point de vue / Paul Rebischung in Géomatique expert, n° 73 (01/02/2010)PermalinkFinite element method for solving geodetic boundary value problems / Z. Faskova in Journal of geodesy, vol 84 n° 2 (February 2010)PermalinkAssessment of a numerical method for computing the spherical harmonic coefficients of the gravitational potential of a constant density polyhedron / Olivier Jamet (2010)PermalinkGlobal gravity field determination using the GPS measurements made onboard the low Earth orbiting satellite CHAMP / Lars Prange (2010)PermalinkIdentification and modelling of sea level change contributors on GRACE satellite gravity data and their applications to climate monitoring / Bert Wouters (2010)PermalinkNuevo ajuste de la Red Geodésica de Espana (ROI) en altitudes ortométricas / José Antonio Sanchez Sobrino in Topografia y cartografia, vol 27 n° 156 (01/01/2010)PermalinkPermalinkSciences of geodesy, vol 1. Advanced and future directions / Guochang Xu (2010)PermalinkSea surface topography and marine geoid by airborne laser altimetry and shipborne ultrasound altimetry / Philippe Limpach (2010)PermalinkClassical globally reflected gravity field determination in modern locally oriented multiscale framework / W. Freeden in Journal of geodesy, vol 83 n° 12 (December 2009)PermalinkEl nuevo modelo de Geoide para España EGM08-REDNAP / José Antonio Sanchez Sobrino in Topografia y cartografia, vol 26 n° 155 (01/12/2009)PermalinkUsing 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)PermalinkWavelet modeling of the gravity field over Japan / Isabelle Panet in Bulletin of the Geographical survey institute, vol 57 (December 2009)PermalinkEfficient propagation of error covariance matrices of gravitational models: application to GRACE and GOCE / Georges Balmino in Journal of geodesy, vol 83 n° 10 (October 2009)PermalinkLocal multi-polar expansions in potential field modeling / B. Minchev in Earth, Planets and Space, vol 61 n° 10 (October 2009)PermalinkRecursive algorithms for the computation of the potential harmonic coefficients of a constant density polyhedron / Dimitrios Tsoulis in Journal of geodesy, vol 83 n° 10 (October 2009)Permalink