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Assessing a new velocity field in Greece towards a new semi-kinematic datum / S. Bitharis in Survey review, vol 51 n° 368 (September 2019)  

Public [article]  inSurvey review > vol 51 n° 368 (September 2019) . - pp 450 - 459 Titre : Assessing a new velocity field in Greece towards a new semi-kinematic datum Type de document : Article/Communication Auteurs : S. Bitharis, Auteur ; N. Papadopoulos, Auteur ; C. Pikridas, Auteur ; et al., Auteur Année de publication : 2019 Article en page(s) : pp 450 - 459 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique [Termes descripteurs IGN] champ de vitesse [Termes descripteurs IGN] déformation de la croute terrestre [Termes descripteurs IGN] géodynamique [Termes descripteurs IGN] Grèce [Termes descripteurs IGN] réseau géodésique local [Termes descripteurs IGN] système de référence local Résumé : (Auteur) Greece has always been an interesting study area for the geodesists due to its intense geodynamic behaviour. Especially, the exploitation of a modern geodetic velocity field using GNSS becomes a crucial requirement for geodetic purposes. The main aim of the present study is the assessment of a modern geodetic velocity model. This procedure is based on the unification of various reference frames, implemented from individual extended GNSS campaigns in different epochs with the effective involvement of the Hellenic Military Geographic Service. The implementation of geodetic velocities in the inhomogeneous Greek velocity field improves significantly the reliability of transformations, more than 60% with respect to the horizontal component, applying a vice versa time shift to a common epoch. We also emphasise the necessity to adopt a velocity model in order to process regional GNSS networks and therefore to establish a modern semi-kinematic reference frame in Greece. Numéro de notice : A2019-386 Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/00396265.2018.1479937 date de publication en ligne : 02/06/2018 En ligne : https://doi.org/10.1080/00396265.2018.1479937 Format de la ressource électronique : URL Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=93476 [article]

Appraisal of the Hellenic Geodetic Reference System 1987 based on backward-transformed ITRF coordinates using a national velocity model / M. Chatzinikos in Survey review, vol 49 n° 356 (November 2017)  

Public [article]  inSurvey review > vol 49 n° 356 (November 2017) . - pp 386 - 398 Titre : Appraisal of the Hellenic Geodetic Reference System 1987 based on backward-transformed ITRF coordinates using a national velocity model Type de document : Article/Communication Auteurs : M. Chatzinikos, Auteur ; C. Kotsakis, Auteur Année de publication : 2017 Article en page(s) : pp 386 - 398 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux [Termes descripteurs IGN] champ de vitesse [Termes descripteurs IGN] géodynamique [Termes descripteurs IGN] Grèce [Termes descripteurs IGN] International Terrestrial Reference Frame [Termes descripteurs IGN] transformation de coordonnées Résumé : (Auteur) The paper presents a detailed accuracy evaluation of the Hellenic Geodetic Reference System 1987 (HGRS87), a non-geocentric traditional local datum which was established thirty years ago and it is still used as the official coordinate system for surveying applications in Greece. This is the first time that a large-scale assessment of HGRS87 is performed, which aims to reveal its weakness by quantifying its consistency with a higher quality ITRF/GNSS-based frame over the entire country. A geodetic velocity model is employed in our analysis in an attempt to eliminate the accumulated geodynamical distortions of the (static) HGRS87 coordinates, and thus to provide a more judicious comparison between the underlying frames at a common epoch. Our results show that, even after removing the geodynamical distortions, the average accuracy of HGRS87 at national scale remains worse than 45 cm, yet significant variations exist in its regional accuracy level over different parts of Greece. Numéro de notice : A2017-557 Thématique : POSITIONNEMENT Nature : Article DOI : 10.1080/00396265.2016.1180797 En ligne : https://doi.org/10.1080/00396265.2016.1180797 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=86618 [article]

Springer handbook of Global Navigation Satellite Systems / Peter J.G. Teunissen (2017)

Public Titre : Springer handbook of Global Navigation Satellite Systems Type de document : Guide/Manuel Auteurs : Peter J.G. Teunissen, Editeur scientifique ; Olivier Montenbruck, Editeur scientifique Editeur : Springer International Publishing Année de publication : 2017 Importance : 1327 Format : 20 x 27 cm ISBN/ISSN/EAN : 978-3-319-42926-7 Note générale : Bibliographie et glossaire Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes descripteurs IGN] antenne GNSS [Termes descripteurs IGN] BeiDou [Termes descripteurs IGN] filtre de Kalman [Termes descripteurs IGN] Galileo [Termes descripteurs IGN] géodynamique [Termes descripteurs IGN] Global Navigation Satellite System [Termes descripteurs IGN] Global Orbitography Navigation Satellite System [Termes descripteurs IGN] GNSS-INS [Termes descripteurs IGN] horloge atomique [Termes descripteurs IGN] interférence [Termes descripteurs IGN] ionosphère [Termes descripteurs IGN] méthode des moindres carrés [Termes descripteurs IGN] orbitographie [Termes descripteurs IGN] orientation [Termes descripteurs IGN] positionnement différentiel [Termes descripteurs IGN] positionnement ponctuel précis [Termes descripteurs IGN] précision du positionnement [Termes descripteurs IGN] récepteur GNSS [Termes descripteurs IGN] réflectométrie par GNSS [Termes descripteurs IGN] résolution d'ambiguïté [Termes descripteurs IGN] signal GNSS [Termes descripteurs IGN] système d'extension [Termes descripteurs IGN] temps universel [Termes descripteurs IGN] traitement du signal [Termes descripteurs IGN] trajet multiple Résumé : (Editeur) This Handbook presents a complete and rigorous overview of the fundamentals, methods and applications of the multidisciplinary field of Global Navigation Satellite Systems (GNSS), providing an exhaustive, one-stop reference work and a state-of-the-art description of GNSS as a key technology for science and society at large. All global and regional satellite navigation systems, both those currently in operation and those under development (GPS, GLONASS, Galileo, BeiDou, QZSS, IRNSS/NAVIC, SBAS), are examined in detail. The functional principles of receivers and antennas, as well as the advanced algorithms and models for GNSS parameter estimation, are rigorously discussed. The book covers the broad and diverse range of land, marine, air and space applications, from everyday GNSS to high-precision scientific applications and provides detailed descriptions of the most widely used GNSS format standards, covering receiver formats as well as IGS product and meta-data formats. The full coverage of the field of GNSS is presented in seven parts, from its fundamentals, through the treatment of global and regional navigation satellite systems, of receivers and antennas, and of algorithms and models, up to the broad and diverse range of applications in the areas of positioning and navigation, surveying, geodesy and geodynamics, and remote sensing and timing. Each chapter is written by international experts and amply illustrated with figures and photographs, making the book an invaluable resource for scientists, engineers, students and institutions alike. Note de contenu : PRINCIPLES OF GNSS 1. Introduction to GNSS 2. Time and reference systems 3. Satellite orbits and attitude 4. Signals and modulation 5. Clocks 6. Atmospheric signal propagation SATELLITE NAVIGATION SYSTEMS 7. The Global Positioning System (GPS) 8. GLONASS 9. Galileo 10. Chinese navigation satellite systems 11. Regional systems 12. Satellite based augmentation systems GNSS RECEIVERS AND ANTENNAS 13. Receiver architecture 14. Signal processing 15. Multipath 16. Interference 17. Antennas 18. Simulators and test equipment GNSS algorithms and models 19. Basic observation equations 20. Combinations of observations 21. Positioning model 22. Least-squares estimation and Kalman filtering 23. Carrier phase integer ambiguity resolution 24. Batch and recursive model validation POSITIONING AND NAVIGATION 25. Precise point positioning 26. Differential positioning 27. Attitude determination 28. GNSS/INS integration 29. Land and maritime applications 30. Aviation applications 31. Ground based augmentation systems 32. Space applications SURVEYING, GEODESY AND GEODYNAMICS 33. The international GNSS service 34. Orbit and clock product generation 35. Surveying 36. Geodesy 37. Geodynamics GNSS REMOTE SENSING AND TIMING 38. Monitoring of the neutral atmosphere 39. Ionosphere monitoring 40. Reflectometry 41. GNSS time and frequency transfer Annex A: Data formats Annex B: GNSS parameters Numéro de notice : 22723 Thématique : POSITIONNEMENT Nature : Manuel Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=85346

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• Springer Handbook of Global Navigation Satellite Systems, ch. 36. Geodesy / Zuheir Altamimi (2017)  

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Earth rotation and geodynamics / Janusz Bogusz in Geodesy and cartography, vol 64 n° 2 (December 2015)  

Public [article]  inGeodesy and cartography > vol 64 n° 2 (December 2015) . - pp 201 - 242 Titre : Earth rotation and geodynamics Type de document : Article/Communication Auteurs : Janusz Bogusz, Auteur ; Alexander Brzezinski, Auteur ; Wieslaw Kosek, Auteur ; Jolanta Nastula, Auteur Année de publication : 2015 Article en page(s) : pp 201 - 242 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale [Termes descripteurs IGN] champ géomagnétique [Termes descripteurs IGN] géodynamique [Termes descripteurs IGN] marée terrestre [Termes descripteurs IGN] Pologne [Termes descripteurs IGN] positionnement par GNSS [Termes descripteurs IGN] positionnement par télémétrie laser sur satellite [Termes descripteurs IGN] rotation de la Terre Résumé : (auteur) This paper presents the summary of research activities carried out in Poland in 2011-2014 in the field of Earth rotation and geodynamics by several Polish research institutions. It contains a summary of works on Earth rotation, including evaluation and prediction of its parameters and analysis of the related excitation data as well as research on associated geodynamic phenomena such as geocentre motion, global sea level change and hydrological processes. The second part of the paper deals with monitoring of geodynamic phenomena. It contains analysis of geodynamic networks of local, and regional scale using space (GNSS and SLR) techniques, Earth tides monitoring with gravimeters and water-tube hydrostatic clinometer, and the determination of secular variation of the Earth’ magnetic field. Numéro de notice : A2015--018 Thématique : POSITIONNEMENT Nature : Article En ligne : http://dx.doi.org/10.1515/geocart-2015-0013 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80814 [article]

Mapping the mass distribution of Earth's mantle using satellite-derived gravity gradients / Isabelle Panet in Nature geoscience, vol 7 n° 2 (February 2014)  

Public [article]  inNature geoscience > vol 7 n° 2 (February 2014) . - pp 131 - 135 Titre : Mapping the mass distribution of Earth's mantle using satellite-derived gravity gradients Type de document : Article/Communication Auteurs : Isabelle Panet , Auteur ; Gwendoline Pajot-Métivier , Auteur ; Marianne Greff-Lefftz, Auteur ; Laurent Métivier , Auteur ; Michel Diament, Auteur ; Mioara Mandea, Auteur Année de publication : 2014 Article en page(s) : pp 131 - 135 Note générale : bibliographie Letter published online on 19 January 2014 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique [Termes descripteurs IGN] analyse de sensibilité [Termes descripteurs IGN] anomalie de pesanteur [Termes descripteurs IGN] données GOCE [Termes descripteurs IGN] géodynamique [Termes descripteurs IGN] gradient de gravitation [Termes descripteurs IGN] manteau terrestre [Termes descripteurs IGN] onde sismique Résumé : (auteur) The dynamics of Earth’s mantle are not well known. Deciphering mantle flow patterns requires an understanding of the global distribution of mantle density. Seismic tomography has been used to derive mantle density distributions, but converting seismic velocities into densities is not straightforward. Here we show that data from the GOCE (Gravity field and steady-state Ocean Circulation Explorer) mission can be used to probe our planet’s deep mass structure. We construct global anomaly maps of the Earth’s gravitational gradients at satellite altitude and use a sensitivity analysis to show that these gravitational gradients image the geometry of mantle mass down to mid-mantle depths. Our maps highlight north–south-elongated gravity gradient anomalies over Asia and America that follow a belt of ancient subduction boundaries, as well as gravity gradient anomalies over the central Pacific Ocean and south of Africa that coincide with the locations of deep mantle plumes. We interpret these anomalies as sinking tectonic plates and convective instabilities between 1,000 and 2,500 km depth, consistent with seismic tomography results. Along the former Tethyan Margin, our data also identify an east–west-oriented mass anomaly likely in the upper mantle. We suggest that by combining gravity gradients with seismic and geodynamic data, an integrated dynamic model for Earth can be achieved. Numéro de notice : A2014-789 Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1038/ngeo2063 En ligne : http://dx.doi.org/10.1038/ngeo2063 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=79968 [article]

International VLBI Service for Geodesy and Astrometry 2013 annual report / Karen D. Baver (2014)  

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International VLBI Service for Geodesy and Astrometry 2010 annual report / Dirk Behrend (2011)  

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vol 88 n° 1 - 01/06/2010 - Proceedings of the EGU G13 symposium "Geodetic and geodynamic programmes of the Central Europe", Vienna, Austria, 2-7 May 2010 (Bulletin de Reports on geodesy) / J. Sledzinski

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Impact of regional reference frame definition on geodynamic interpretations / Juliette Legrand in Journal of geodynamics, vol 49 n° 3-4 (April 2010)  

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International VLBI Service for Geodesy and Astrometry 2009 annual report / Dirk Behrend (2010)  

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Research contibutions in the field of enginering surveying within period 2007-2008 (Bulletin de Reports on geodesy) / Witold Proszynski

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Estimating sea floor dynamics in the southern North Sea to improve bathymetric survey planning / L. Dorst (2009)

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International Laser Ranging Service (ILRS) 2007-2008 annual report / Carey E. Noll (2009)

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International VLBI Service for Geodesy and Astrometry 2008 annual report / Dirk Behrend (2009)  

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vol 28 - Proceedings of the workshop seismicity patterns in the Euro-Med region, 17-19 november 2008, Luxembourg [Actes] (Bulletin de Cahiers du Centre Europeen de Geodynamique et de Séismologie, vol 28 [01/01/2009]) / A. Oth

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