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Auteur Zuheir Altamimi
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Understanding sea-level rise and variability, ch 9. Geodetic observations and global reference frame contributions to understanding sea-level rise and variability / Geoffrey Blewitt (2010)
Titre de série : Understanding sea-level rise and variability, ch 9 Titre : Geodetic observations and global reference frame contributions to understanding sea-level rise and variability Type de document : Chapitre/Contribution Auteurs : Geoffrey Blewitt, Auteur ; Zuheir Altamimi , Auteur ; James Davis, Auteur ; et al., Auteur Editeur : New York, Londres, Hoboken (New Jersey), ... : John Wiley & Sons Année de publication : 2010 Importance : pp 256 - 284 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] coordonnées cartésiennes géocentriques
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] montée du niveau de la mer
[Termes IGN] variabilitéRésumé : (auteur) This chapter contains sections titled: -Introduction, -Global and Regional Reference Systems, -Linking GPS to Tide Gauges and Tide-Gauge Benchmarks, -Recommendations for Geodetic Observations. Numéro de notice : H2010-017 Affiliation des auteurs : LAREG+Ext (1991-2011) Thématique : POSITIONNEMENT Nature : Chapître / contribution nature-HAL : ChOuvrScient DOI : 10.1002/9781444323276.ch9 Date de publication en ligne : 05/07/2010 En ligne : https://doi.org/10.1002/9781444323276.ch9 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=102044 Local effects of redundant terrestrial and GPS-based tie vectors in ITRF-like combinations / Claudio Abbondanza in Journal of geodesy, vol 83 n° 11 (November 2009)
[article]
Titre : Local effects of redundant terrestrial and GPS-based tie vectors in ITRF-like combinations Type de document : Article/Communication Auteurs : Claudio Abbondanza, Auteur ; Zuheir Altamimi , Auteur ; Pierguido Sarti, Auteur ; Monia Negusini, Auteur ; Luca Vittuari, Auteur Année de publication : 2009 Article en page(s) : pp 1031 - 1040 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] co-positionnement
[Termes IGN] interférométrie à très grande base
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] point de liaison (géodésie)
[Termes IGN] positionnement par GPSRésumé : (auteur) Tie vectors (TVs) between co-located space geodetic instruments are essential for combining terrestrial reference frames (TRFs) realised using different techniques. They provide relative positioning between instrumental reference points (RPs) which are part of a global geodetic network such as the international terrestrial reference frame (ITRF). This paper gathers the set of very long baseline interferometry (VLBI)–global positioning system (GPS) local ties performed at the observatory of Medicina (Northern Italy) during the years 2001–2006 and discusses some important aspects related to the usage of co-location ties in the combinations of TRFs. Two measurement approaches of local survey are considered here: a GPS-based approach and a classical approach based on terrestrial observations (i.e. angles, distances and height differences). The behaviour of terrestrial local ties, which routinely join combinations of space geodetic solutions, is compared to that of GPS-based local ties. In particular, we have performed and analysed different combinations of satellite laser ranging (SLR), VLBI and GPS long term solutions in order to (i) evaluate the local effects of the insertion of the series of TVs computed at Medicina, (ii) investigate the consistency of GPS-based TVs with respect to space geodetic solutions, (iii) discuss the effects of an imprecise alignment of TVs from a local to a global reference frame. Results of ITRF-like combinations show that terrestrial TVs originate the smallest residuals in all the three components. In most cases, GPS-based TVs fit space geodetic solutions very well, especially in the horizontal components (N, E). On the contrary, the estimation of the VLBI RP Up component through GPS technique appears to be awkward, since the corresponding post fit residuals are considerably larger. Besides, combination tests including multi-temporal TVs display local effects of residual redistribution, when compared to those solutions where Medicina TVs are added one at a time. Finally, the combination of TRFs turns out to be sensitive to the orientation of the local tie into the global frame. Numéro de notice : A2009-583 Affiliation des auteurs : IGN+Ext (1940-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-009-0321-6 En ligne : https://doi.org/10.1007/s00190-009-0321-6 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=88652
in Journal of geodesy > vol 83 n° 11 (November 2009) . - pp 1031 - 1040[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 266-09101 SL Revue Centre de documentation Revues en salle Disponible Local effects of redundant terrestrial and GPS-based tie vectors in ITRF-like combinations / Claudio Abbondanza in Journal of geodesy, vol 83 n° 11 (November 2009)
[article]
Titre : Local effects of redundant terrestrial and GPS-based tie vectors in ITRF-like combinations Type de document : Article/Communication Auteurs : Claudio Abbondanza, Auteur ; Zuheir Altamimi , Auteur ; Pierguido Sarti, Auteur ; Monia Negusini, Auteur ; Luca Vittuari, Auteur Année de publication : 2009 Article en page(s) : pp 1031 - 1040 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] analyse comparative
[Termes IGN] géodésie terrestre
[Termes IGN] interférométrie à très grande base
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] point de liaison (géodésie)
[Termes IGN] positionnement par GPS
[Termes IGN] système de référence mondialRésumé : (Auteur) Tie vectors (TVs) between co-located space geodetic instruments are essential for combining terrestrial reference frames (TRFs) realised using different techniques. They provide relative positioning between instrumental reference points (RPs) which are part of a global geodetic network such as the international terrestrial reference frame (ITRF). This paper gathers the set of very long baseline interferometry (VLBI)–global positioning system (GPS) local ties performed at the observatory of Medicina (Northern Italy) during the years 2001–2006 and discusses some important aspects related to the usage of co-location ties in the combinations of TRFs. Two measurement approaches of local survey are considered here: a GPS-based approach and a classical approach based on terrestrial observations (i.e. angles, distances and height differences). The behaviour of terrestrial local ties, which routinely join combinations of space geodetic solutions, is compared to that of GPS-based local ties. In particular, we have performed and analysed different combinations of satellite laser ranging (SLR), VLBI and GPS long term solutions in order to (i) evaluate the local effects of the insertion of the series of TVs computed at Medicina, (ii) investigate the consistency of GPS-based TVs with respect to space geodetic solutions, (iii) discuss the effects of an imprecise alignment of TVs from a local to a global reference frame. Results of ITRF-like combinations show that terrestrial TVs originate the smallest residuals in all the three components. In most cases, GPS-based TVs fit space geodetic solutions very well, especially in the horizontal components (N, E). On the contrary, the estimation of the VLBI RP Up component through GPS technique appears to be awkward, since the corresponding post fit residuals are considerably larger. Besides, combination tests including multi-temporal TVs display local effects of residual redistribution, when compared to those solutions where Medicina TVs are added one at a time. Finally, the combination of TRFs turns out to be sensitive to the orientation of the local tie into the global frame. Copyright Springer Numéro de notice : A2009-476 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-009-0321-6 En ligne : https://doi.org/10.1007/s00190-009-0321-6 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30105
in Journal of geodesy > vol 83 n° 11 (November 2009) . - pp 1031 - 1040[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 266-09101 SL Revue Centre de documentation Revues en salle Disponible ETRS89 realization: current status, ETRF2005 and future development / Zuheir Altamimi in Bulletin of geodesy and geomatics BGG, vol 68 n° 3 (October 2009)
[article]
Titre : ETRS89 realization: current status, ETRF2005 and future development Type de document : Article/Communication Auteurs : Zuheir Altamimi , Auteur Année de publication : 2009 Article en page(s) : pp 255 - 267 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] European Terrestrial Reference Frame
[Termes IGN] European Terrestrial Reference System 1989
[Termes IGN] International Terrestrial Reference SystemRésumé : (Auteur) The European Terrestrial Reference System 1989 (ETRS89) was defined and adopted by EUREF in 1990 and since then is largely used by most of European countries as the basis of their national geodetic system. This paper re-discusses the ETRS89 definition, its mathematical link to the International Terrestrial Reference System (ITRS), focuses on the main ways allowing its realization and raises the awareness of possible misinterpretation of its definition and in particular the misuse of the epoch 1989.0 inherent in its definition. Some numerical examples are provided in order to illustrate the discussion. Particular focus is given to the ETRF2005 and its consequences in terms of frame shifts (origin, scale and orientation) as well as consequent station coordinate changes with respect to ETRF2000. Nonetheless, a mathematically sound alternative of the ETRS89 realization is also proposed, leading to frame definition changes due to the well known estimation process, while perfectly satisfying the ETRS89 definition. Given the fact that the ETRS89 is designed primarily for practical geo-referencing applications where these frame shifts are not desired, it is therefore recommended to adopt the ETRF2000 as the basic frame of the ETRS89 realization for future adoption by the European National Mapping Agencies. Procedure how to access the ETRF2000 frame from any ITRF version is described. Numéro de notice : A2009-567 Affiliation des auteurs : IGN (1940-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueNat DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=77994
in Bulletin of geodesy and geomatics BGG > vol 68 n° 3 (October 2009) . - pp 255 - 267[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 013-09031 RAB Revue Centre de documentation En réserve L003 Disponible Rates of sea‐level change over the past century in a geocentric reference frame / Guy Wöppelmann in Geophysical research letters, vol 36 n° 12 (June 2009)
[article]
Titre : Rates of sea‐level change over the past century in a geocentric reference frame Type de document : Article/Communication Auteurs : Guy Wöppelmann , Auteur ; C. Letetrel, Auteur ; Álvaro Santamaría, Auteur ; Marie-Noëlle Bouin , Auteur ; Xavier Collilieux , Auteur ; Zuheir Altamimi , Auteur ; Simon D.P. Williams, Auteur ; Bélen Martín Míguez, Auteur Année de publication : 2009 Projets : 3-projet - voir note / Article en page(s) : 6 p. Note générale : bibliographie
The work was partly funded by Région Poitou‐Charentes, which provided a PhD fellowship for C. Letetrel, and by CNES which provided additional support via its TOSCA program.Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] analyse spatio-temporelle
[Termes IGN] déformation verticale de la croute terrestre
[Termes IGN] données marégraphiques
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] niveau de la merRésumé : (auteur) The results from a carefully implemented GPS analysis, using a strategy adapted to determine accurate vertical station velocities, are presented. The stochastic properties of our globally distributed GPS position time series were inferred, allowing the computation of reliable velocity uncertainties. Most uncertainties were several times smaller than the 1–3 mm/yr global sea level change, and hence the vertical velocities could be applied to correct the long tide gauge records for land motion. The sea level trends obtained in the ITRF2005 reference frame are more consistent than in the ITRF2000 or corrected for Glacial‐Isostatic Adjustment (GIA) model predictions, both on the global and the regional scale, leading to a reconciled global rate of geocentric sea level rise of 1.61 ± 0.19mm/yr over the past century in good agreement with the most recent estimates. Numéro de notice : A2009-587 Affiliation des auteurs : LAREG+Ext (1991-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1029/2009GL038720 Date de publication en ligne : 24/06/2009 En ligne : https://doi.org/10.1029/2009GL038720 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=90911
in Geophysical research letters > vol 36 n° 12 (June 2009) . - 6 p.[article]Documents numériques
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Rates of sea‐level change ... - pdf éditeurAdobe Acrobat PDF Effect of the satellite laser ranging network distribution on geocenter motion estimation / Xavier Collilieux in Journal of geophysical research : Solid Earth, Vol 114 n° B4 (April 2009)PermalinkIGS contribution to the ITRF / Zuheir Altamimi in Journal of geodesy, vol 83 n° 3-4 (March - April 2009)PermalinkGlobal Geodetic Observing System : Meeting the Requirements of a Global Society on a Changing Planet in 2020, ch. 2. The goals, achievements, and tools of modern geodesy / Hans-Peter Plag (2009)PermalinkGlobal Geodetic Observing System : Meeting the Requirements of a Global Society on a Changing Planet in 2020, ch. 8. The future geodetic reference frame / T.A. Herring (2009)PermalinkImpact of the network effect on the origin and scale: case study of Satellite Laser Ranging / Xavier Collilieux (2009)PermalinkPermalinkPermalinkPermalinkPermalinkPermalink
HDR in 2006
IAG Vice-President