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Extracting tidal frequencies using multivariate harmonic analysis of sea level height time series / Ali Reza Amiri-Simkooei in Journal of geodesy, vol 88 n° 10 (October 2014)
[article]
Titre : Extracting tidal frequencies using multivariate harmonic analysis of sea level height time series Type de document : Article/Communication Auteurs : Ali Reza Amiri-Simkooei, Auteur ; S. Zaminpardaz, Auteur ; M. Sharifi, Auteur Année de publication : 2014 Article en page(s) : pp 975 - 988 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] données marégraphiques
[Termes IGN] fonction harmonique
[Termes IGN] marée océanique
[Termes IGN] niveau de la mer
[Termes IGN] série temporelleRésumé : (Auteur) This contribution is seen as a first attempt to extract the tidal frequencies using a multivariate spectral analysis method applied to multiple time series of tide-gauge records. The existing methods are either physics-based in which the ephemeris of Moon, Sun and other planets are used, or are observation-based in which univariate analysis methods—Fourier and wavelet for instance—are applied to tidal observations. The existence of many long tide-gauge records around the world allows one to use tidal observations and extract the main tidal constituents for which efficient multivariate methods are to be developed. This contribution applies the multivariate least-squares harmonic estimation (LS-HE) to the tidal time series of the UK tide-gauge stations. The first 413 harmonics of the tidal constituents and their nonlinear components are provided using the multivariate LS-HE. A few observations of the research are highlighted: (1) the multivariate analysis takes information of multiple time series into account in an optimal least-squares sense, and thus the tidal frequencies have higher detection power compared to the univariate analysis. (2) Dominant tidal frequencies range from the long-term signals to the sixth-diurnal species interval. Higher frequencies have negligible effects. (3) The most important tidal constituents (the first 50 frequencies) ordered from their amplitudes range from 212 cm (M2) to 1 cm (OQ2) for the data set considered. There are signals in this list that are not available in the 145 main tidal frequencies of the literature. (4) Tide predictions using different lists of tidal frequencies on five different data sets around the world are compared. The prediction results using the first significant 50 constituents provided promising results on these locations of the world. Numéro de notice : A2014-516 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-014-0737-5 Date de publication en ligne : 29/06/2014 En ligne : https://doi.org/10.1007/s00190-014-0737-5 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=74120
in Journal of geodesy > vol 88 n° 10 (October 2014) . - pp 975 - 988[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 266-2014101 SL Revue Centre de documentation Revues en salle Disponible Sea level and global ice volumes from the Last Glacial Maximum to the Holocene / Kurt Lambeck in Proceedings of the National Academy of Sciences of the United States of America PNAS, vol 111 n° 43 (2014)
[article]
Titre : Sea level and global ice volumes from the Last Glacial Maximum to the Holocene Type de document : Article/Communication Auteurs : Kurt Lambeck, Auteur ; Hélène Rouby , Auteur ; Anthony Purcell, Auteur ; Yiying Sun, Auteur ; Malcom Sambridge, Auteur Année de publication : 2014 Article en page(s) : pp 15296 - 15303 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] glace
[Termes IGN] niveau de la mer
[Termes IGN] volume d'eauRésumé : (auteur) The major cause of sea-level change during ice ages is the exchange of water between ice and ocean and the planet’s dynamic response to the changing surface load. Inversion of ∼1,000 observations for the past 35,000 y from localities far from former ice margins has provided new constraints on the fluctuation of ice volume in this interval. Key results are: (i) a rapid final fall in global sea level of ∼40 m in Numéro de notice : A2014-394 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1073/pnas.1411762111 En ligne : https://doi.org/10.1073/pnas.1411762111 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=99591
in Proceedings of the National Academy of Sciences of the United States of America PNAS > vol 111 n° 43 (2014) . - pp 15296 - 15303[article]Ultra-sensitive electrostatic planar acceleration gradiometer for airborne geophysical surveys / Karim Douch in Measurement Science and Technology, vol 25 n° 10 (October 2014)
[article]
Titre : Ultra-sensitive electrostatic planar acceleration gradiometer for airborne geophysical surveys Type de document : Article/Communication Auteurs : Karim Douch , Auteur ; Bruno Christophe, Auteur ; Bernard Foulon, Auteur ; Isabelle Panet , Auteur ; Gwendoline Pajot-Métivier , Auteur ; Michel Diament , Auteur Année de publication : 2014 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] accéléromètre
[Termes IGN] gradiomètre
[Termes IGN] gravimétrie aérienne
[Termes IGN] instrument de géophysiqueRésumé : (auteur) We propose a new concept of gravity gradiometer, GREMLIT, for the determination of the spatial derivatives of gravitational acceleration during airborne surveys. The core of this instrument is the acceleration gradiometer composed of four ultra-sensitive electrostatic planar accelerometers, inheriting from technologies developed for the GRACE and GOCE satellite gravity missions. Data from these missions have greatly improved our knowledge of the Earth's gravity field and its time variations. However, resolving wavelengths of a few 10 km or less, beyond the reach of the satellite resolution, is of utmost importance to study a number of crustal geophysical processes and geological structures. We first present the benefits for a new gravity gradiometer, then we describe the planar acceleration gradiometer, which put together with three orthogonal gyroscopes, constitutes the gravity gradiometer GREMLIT. The acceleration gradiometer enables measurement at one point of the horizontal spatial derivatives of the acceleration horizontal components. We explain the measurement principle and describe the computation of the gravity gradients along with the necessary ancillary measurements. From a detailed error budget analysis of the accelerometers, an expected spectral sensitivity below $\text{1E/}\sqrt{\text{Hz}}$ is found in the [10−3, 0.2] Hz measurement bandwidth. To maintain such performance in flight, we finally discuss the adaptation of the acceleration gradiometer to the turbulent airborne environment. To limit the saturation of the accelerometers, we propose to cancel the common-mode output of the acceleration gradiometer by integrating the instrument on a double-gimbal platform controlled by the common-mode. We demonstrate on a real case study that with such a solution, it is technically possible to prevent the saturation of the accelerometers at least 95% of the time and it is not damaging to the airborne survey. Numéro de notice : A2014-782 Affiliation des auteurs : LASTIG LAREG+Ext (2012-mi2018) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1088/0957-0233/25/10/105902 Date de publication en ligne : 20/08/2014 En ligne : http://dx.doi.org/10.1088/0957-0233/25/10/105902 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=78599
in Measurement Science and Technology > vol 25 n° 10 (October 2014)[article]Rescue of the historical sea level record of Marseille (France) from 1885 to 1988 and its extension back to 1849–1851 / Guy Wöppelmann in Journal of geodesy, vol 88 n° 9 (September 2014)
[article]
Titre : Rescue of the historical sea level record of Marseille (France) from 1885 to 1988 and its extension back to 1849–1851 Type de document : Article/Communication Auteurs : Guy Wöppelmann , Auteur ; Marta Marcos, Auteur ; Alain Coulomb , Auteur ; Bélen Martín Míguez, Auteur ; Paul Bonnetain, Auteur ; Claude Boucher , Auteur ; Médéric Gravelle, Auteur ; Bernard Simon, Auteur ; Pascal Tiphaneau, Auteur Année de publication : 2014 Article en page(s) : pp 869 - 885 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] dix-neuvième siècle
[Termes IGN] histoire des sciences et techniques
[Termes IGN] marégraphe
[Termes IGN] marégraphie
[Termes IGN] Marseille
[Termes IGN] niveau moyen des mersRésumé : (Auteur) This paper describes the historical sea level data that we have rescued from a tide gauge, especially devised originally for geodesy. This gauge was installed in Marseille in 1884 with the primary objective of defining the origin of the height system in France. Hourly values for 1885–1988 have been digitized from the original tidal charts. They are supplemented by hourly values from an older tide gauge record (1849–1851) that was rediscovered during a survey in 2009. Both recovered data sets have been critically edited for errors and their reliability assessed. The hourly values are thoroughly analysed for the first time after their original recording. A consistent high-frequency time series is reported, increasing notably the length of one of the few European sea level records in the Mediterranean Sea spanning more than one hundred years. Changes in sea levels are examined, and previous results revisited with the extended time series. The rate of relative sea level change for the period 1849–2012 is estimated to have been 1.08±0.04 mm/year at Marseille, a value that is slightly lower but in close agreement with the longest time series of Brest over the common period ( 1.26±0.04 mm/year). The data from a permanent global positioning system station installed on the roof of the solid tide gauge building suggests a remarkable stability of the ground ( −0.04±0.25 mm/year) since 1998, confirming the choice made by our predecessor geodesists in the nineteenth century regarding this site selection. Numéro de notice : A2014-457 Affiliation des auteurs : IGN+Ext (2012-2019) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-014-0728-6 Date de publication en ligne : 08/06/2014 En ligne : https://doi.org/10.1007/s00190-014-0728-6 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=74029
in Journal of geodesy > vol 88 n° 9 (September 2014) . - pp 869 - 885[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 266-2014091 SL Revue Centre de documentation Revues en salle Disponible Documents numériques
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Rescue of the historical sea level record of Marseille ... - pdf éditeurAdobe Acrobat PDF Secular changes in Earth’s shape and surface mass loading derived from combinations of reprocessed global GPS networks / david Booker in Journal of geodesy, vol 88 n° 9 (September 2014)
[article]
Titre : Secular changes in Earth’s shape and surface mass loading derived from combinations of reprocessed global GPS networks Type de document : Article/Communication Auteurs : david Booker, Auteur ; Peter J. Clarke, Auteur ; David Lavallée, Auteur Année de publication : 2014 Article en page(s) : pp 839 - 855 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] croute terrestre
[Termes IGN] détection de changement
[Termes IGN] masse d'eau
[Termes IGN] masse de la Terre
[Termes IGN] traitement de données GNSSRésumé : (Auteur) The changing distribution of surface mass (oceans, atmospheric pressure, continental water storage, groundwater, lakes, snow and ice) causes detectable changes in the shape of the solid Earth, on time scales ranging from hours to millennia. Transient changes in the Earth’s shape can, regardless of cause, be readily separated from steady secular variation in surface mass loading, but other secular changes due to plate tectonics and glacial isostatic adjustment (GIA) cannot. We estimate secular station velocities from almost 11 years of high quality combined GPS position solutions (GPS weeks 1,000–1,570) submitted as part of the first international global navigation satellite system service reprocessing campaign. Individual station velocities are estimated as a linear fit, paying careful attention to outliers and offsets. We remove a suite of a priori GIA models, each with an associated set of plate tectonic Euler vectors estimated by us; the latter are shown to be insensitive to the a priori GIA model. From the coordinate time series residuals after removing the GIA models and corresponding plate tectonic velocities, we use mass-conserving continental basis functions to estimate surface mass loading including the secular term. The different GIA models lead to significant differences in the estimates of loading in selected regions. Although our loading estimates are broadly comparable with independent estimates from other satellite missions, their range highlights the need for better, more robust GIA models that incorporate 3D Earth structure and accurately represent 3D surface displacements. Numéro de notice : A2014-455 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-014-0725-9 Date de publication en ligne : 06/05/2014 En ligne : https://doi.org/10.1007/s00190-014-0725-9 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=74027
in Journal of geodesy > vol 88 n° 9 (September 2014) . - pp 839 - 855[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 266-2014091 SL Revue Centre de documentation Revues en salle Disponible PermalinkLes effets de l'oscillation Nord-Atlantique sur les transferts de masse, vus par géodésie / Pierre Valty in XYZ, n° 139 (juin - août 2014)PermalinkEssai sur la découverte du g et son incidence en topographie / Paul Courbon in XYZ, n° 139 (juin - août 2014)PermalinkEstimated SLR station position and network frame sensitivity to time-varying gravity / Nikita P. Zelensky in Journal of geodesy, vol 88 n° 6 (June 2014)PermalinkModélisation numérique du champ de gravité produit par une structure géologique arbitraire / Clément Roussel in XYZ, n° 139 (juin - août 2014)PermalinkComparison among three harmonic analysis techniques on the sphere and the ellipsoid / Hussein Abd-Elmotaal in Journal of applied geodesy, vol 8 n° 1 (April 2014)PermalinkEvaluation of the third- and fourth-generation GOCE Earth gravity field models with Australian terrestrial gravity data in spherical harmonics / Moritz Rexer in Journal of geodesy, vol 88 n° 4 (April 2014)PermalinkThe quest for a consistent signal in ground and GRACE gravity time-series / Michel Van Camp in Geophysical journal international, vol 197 n° 1 (April 2014)PermalinkGOCE: Probing Earth's interior / Isabelle Panet in Horizon 2020 Projects : Portal, n° 2 (March 2014)PermalinkThe impact of the dynamic sea surface topography on the quasi-geoid in shallow coastal waters / D.C. Slobbe in Journal of geodesy, vol 88 n° 3 (March 2014)Permalink