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150 years of international cooperation in geodesy: precursors and development of Baeyer's project to a scientific organisation / Wolfgang Torge in ZFV, Zeitschrift für Geodäsie, Geoinformation und Landmanagement, vol 137 n° 3 (01/06/2012)

Public [article]  inZFV, Zeitschrift für Geodäsie, Geoinformation und Landmanagement > vol 137 n° 3 (01/06/2012) . - pp 166 - 174 Titre : 150 years of international cooperation in geodesy: precursors and development of Baeyer's project to a scientific organisation Type de document : Article/Communication Auteurs : Wolfgang Torge, Auteur Année de publication : 2012 Article en page(s) : pp 166 - 174 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie ancienne [Termes IGN] arc de méridien [Termes IGN] Europe centrale [Termes IGN] figure de la Terre [Termes IGN] histoire de la cartographie [Termes IGN] histoire des sciences et techniques Résumé : (Auteur) Geodesy commemorates this year the foundation of the "Mitteleuropäische Gradmessung", which started its activities 150 years ago. Originated from an initiative of the Prussian General Baeyer, this regional geodetic project required international cooperation. Outstanding organization soon led to a scientific body which continuously extended over the globe and finally built a global network of geodetic science, represented today by the "International Association of Geodesy" (IAG). The following paper first remembers the start of international cooperation at the beginning of modern geodesy, as realized through the arc measurements of the 18th and the early 19th century. First attempts for arc measurements covering central Europe then are found in the first half of the 19th century - connected with the names of Zach, Schumacher, Gauss, Müffling, Bessel and Struve, among others. Based upon a memorandum presented 1861, Baeyer proposed a coordinated proceeding and clearly defined the problems to be solved. This idea soon led to a governmental supported project and an organization which rapidly extended beyond the boundaries of central Europe. This early phase of international cooperation is discussed in more detail. Finally, the later extension of this early structure to a global scientific organization and the increasing incorporation into interdisciplinary geoscientific research is shortly described. Numéro de notice : A2012-269 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31715 [article]

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199-2012031	RSREV	Revue	Centre de documentation	Revues en salle	Disponible

Geodesy / Wolfgang Torge (2012)

Public Titre : Geodesy Type de document : Guide/Manuel Auteurs : Wolfgang Torge, Auteur ; Jurgen Müller, Auteur Mention d'édition : 4th edition Editeur : Berlin, New York : Walter de Gruyter Année de publication : 2012 Importance : 433 p. Format : 17 x 24 cm ISBN/ISSN/EAN : 978-3-11-020718-7 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie [Termes IGN] champ de gravitation [Termes IGN] géodésie spatiale [Termes IGN] géopositionnement [Termes IGN] gravimétrie [Termes IGN] mesure géodésique [Termes IGN] réseau géodésique [Termes IGN] système de référence géodésique Index. décimale : 30.00 Géodésie - généralités Résumé : (Auteur) The fourth edition of this textbook has been thoroughly revised in order to reflect the central role which geodesy has achieved in the past ten years. The Global Geodetic Observing System established by the IAG utilizes a variety of techniques to determine the geometric shape of the Earth and its kinematics, the variations of Earth rotation, and the Earth’s gravity field. Space techniques play a fundamental role, with recent space missions also including gravity field recovery. Terrestrial techniques are important for regional and local applications, and for validating the results of the space missions. Global and regional reference systems are now well established and widely used. They also serve as a basis for geo-information systems. The analysis of the time variation of the geodetic products provides the link to other geosciences and contributes to proper modelling of geodynamic processes. The book follows the principal directions of geodesy, providing the theoretical background as well as the principles of measurement and evaluation methods. Selected examples of instruments illustrate the geodetic work. An extensive reference list supports further studies. The book is intended to serve as an introductory textbook for graduate students as well as a reference for scientists and engineers in the fields of geodesy, geophysics, surveying engineering and geomatics Note de contenu : 1 Introduction 1.1 Definition of geodesy 1.2 The objective of geodesy 1.3 Historical development of geodesy 1.4 Organization of geodesy, literature 2 Reference Systems and Reference Frames 2.1 Basic units and constants 2.2 Time systems 2.3 Reference coordinate systems: fundamentals 2.4 International reference systems and reference frames 2.5 Local level systems 3 The Gravity Field of the Earth 3.1 Fundamentals of gravity field theory 3.2 Geometry of the gravity field 3.3 Spherical harmonic expansion of the gravitational potential 3.4 The geoid 3.5 Temporal gravity variations 4 The Geodetic Earth Model 4.1 The rotational ellipsoid 4.2 The normal gravity field 4.3 Geodetic reference systems, optimum Earth model 5 Methods of Measurement 5.1 Atmospheric refraction 5.2 Satellite observations 5.3 Geodetic astronomy 5.4 Gravimetry 5.5 Terrestrial geodetic measurements 6 Methods of Positioning and Gravity Field Modeling 6.1 Residual gravity field 6.2 Three-dimensional positioning 6.3 Horizontal positioning 6.4 Height determination 6.5 Fundamentals of gravity field modeling 6.6 Global gravity field modeling 6.7 Local gravity field modeling 6.8 Least-squares collocation 7 Geodetic and Gravimetric Networks 7.1 Horizontal control networks 7.2 Vertical control networks 7.3 Three-dimensional networks 7.4 Gravity networks 8 Structure and Dynamics of the Earth 8.1 The geophysical Earth model 8.2 The upper layers of the Earth 8.3 Geodesy and recent geodynamics Numéro de notice : 15799 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Manuel de cours DOI : sans Accessibilité hors numérique : Accessible via le SUDOC (sur demande au cdos) Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=45266

Geodesy / Wolfgang Torge (2001)  

Public Titre : Geodesy Type de document : Guide/Manuel Auteurs : Wolfgang Torge, Auteur Mention d'édition : 3rd completely revised and extended edition Editeur : Berlin, New York : Walter de Gruyter Année de publication : 2001 Importance : 416 p. Format : 17 x 24 cm ISBN/ISSN/EAN : 978-3-11-017072-6 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie [Termes IGN] astronomie [Termes IGN] champ de pesanteur terrestre [Termes IGN] ellipsoïde de référence [Termes IGN] force de gravitation [Termes IGN] géodésie tridimensionnelle [Termes IGN] géodynamique [Termes IGN] géoïde [Termes IGN] gravimétrie [Termes IGN] interférométrie à très grande base [Termes IGN] mesurage de distances [Termes IGN] nivellement [Termes IGN] positionnement par géodésie spatiale [Termes IGN] réseau géodésique [Termes IGN] réseau gravimétrique [Termes IGN] système de référence céleste [Termes IGN] système de référence géodésique [Termes IGN] tectonique Index. décimale : 30.00 Géodésie - généralités Résumé : (Editeur) This book covers the entire field of geodesy and is intended to serve as an introductory textbook for graduate students as well as a reference for scientists and engineers in the fields of geodesy, geophysics, surveying engineering, and geomatics. It provides a systematic overview of fundamental theories, geodetic reference systems, and spatial and terrestrial measurement methods, together with the respective modeling techniques. The third edition has been completely revised in order to adequately reflect the tremendous changes which have occured in geodesy in the last twenty years, where space techniques are now the predominante tool for positioning and gravity field determination. Establishment of geodetic control networks has followed these developments, with far-reaching consequences for applied geodesy. High data rates and improved accuracy have increased geodetic contributions to geodynamics research. The present state of geodesy is illustrated by selected examples of instruments and results of geodetic data processing. An extensive reference list supports further studies. Note de contenu : 1) Introduction 2) Reference systems 3) The gravity field of the earth 4) The geodetic earth model 5) Methods of measurement 6) Methods of evaluation 7) Geodetic and gravimetric networks 8) Structure and dynamics of the earth Numéro de notice : 13258 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Manuel de cours DOI : 10.1515/9783110879957.fm En ligne : https://doi.org/10.1515/9783110879957.fm Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=54942

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13258-02	DEP-ELG	Livre	Marne-la-Vallée	Dépôt en unité	Exclu du prêt

Absolute and relative gravimetry 1990-1992-1995 in the Western Yunnan earthquake prediction experimental area / Wolfgang Torge (1999)

Public Titre : Absolute and relative gravimetry 1990-1992-1995 in the Western Yunnan earthquake prediction experimental area Type de document : Monographie Auteurs : Wolfgang Torge, Auteur ; M. Schnull, Auteur ; Ludger Timmen, Auteur ; J. Minyu, Auteur ; X. Canfei, Auteur ; L. Hui, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 1999 Collection : DGK - B Sous-collection : Angewandte Geodäsie num. 307 Importance : 48 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-8587-9 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique [Termes IGN] Chine [Termes IGN] gravimètre absolu [Termes IGN] gravimètre supraconducteur [Termes IGN] gravimétrie [Termes IGN] levé gravimétrique [Termes IGN] Pékin (Chine) [Termes IGN] prédiction [Termes IGN] risque naturel [Termes IGN] séisme Index. décimale : 30.43 Travaux de géodésie physique Résumé : (Auteur) The Western Yunnan Earthquake Prediction Experimental Area (WYEPEA) has been established in the middle of the 1980's by the State Seismological Bureau (SSB) of China, in order to study the geodynamic processes occurring in this region of high seismic activity. Absolute gravimetry was introduced into the WYEPEA gravity control in 1990, within the frame of a cooperation project between the Institute of Seismology, State Seismological Bureau (ISSSB), Wuhan, and the Institut für Erdmessung (IfE), University of Hannover, Germany. Three observation campaigns were performed (1990, 1992, 1995) employing the JILAG-3 absolute gravity meter of IfE. Six absolute stations have been established in the area, and additional absolute measurements were carried out in the reference stations Beijing, Wuhan, and Kunming. Relative gravity measurements between the absolute stations served for an independent control and connect the existing GPS control network to the gravity net. In addition, a micro gravity net and a vertical gravity gradient line have been established and remeasured, in order to study local gravity variations at selected fault zones. The accuracy of the absolute gravity results is estimated to ±0.05 µms- while the repeatability is slightly better. In the local systems a relative accuracy of ±0.01 ... 0.03 µms- has been achieved. Large-scale gravity variations with time could not be detected between 1990 and 1995, but local changes due to groundwater-table variations or seismic activity may reach 0.1µms-. In the local systems small gravity changes have been found, with a certain correlation to tectonic structures. The report presents the final results of the project, especially station descriptions and gravity values for the epochs 1990, 1992, and 1995. It thus will serve as a basis for future gravity campaigns, and analyzing gravity changes which might be detected then. Numéro de notice : 57511 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=60224

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57511-01	30.43	Livre	Centre de documentation	Géodésie	Disponible
57511-02	30.43	Livre	Centre de documentation	Géodésie	Disponible

Das Deutsche Schweregrundnetz 1994 (DSGN94) / Wolfgang Torge (1999)

Public Titre : Das Deutsche Schweregrundnetz 1994 (DSGN94) Type de document : Monographie Auteurs : Wolfgang Torge, Auteur ; R. Falk, Auteur ; A. Franke, Auteur ; E. Reinhart, Auteur ; Bernd Richter, Auteur ; M. Sommer, Auteur ; H. Wilmes, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 1999 Collection : DGK - B Sous-collection : Angewandte Geodäsie num. 309 Importance : 231 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-8589-3 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux [Termes IGN] Allemagne [Termes IGN] réseau géodésique Index. décimale : 30.10 Systèmes de référence et réseaux géodésiques Résumé : (Auteur) After the German reunification the German Geodetic Commission decided to extend the German Gravity Reference Network of 1976 (DSGN76) to the area of the new federal states and to perform a complete re-observation. The "Institut für Angewandte Geodasie (IfAG)' " - now "Bundesamt für Kartographie und Geodasie (BKG)" - was asked to carry out the measurements and data evaluation works. Absolute gravity measurements with the absolute gravimeter FG5-101 of BKG have been performed on all station centers of the increased network with now 30 point groups. Additional relative gravity measurements have been carried out with four gravimeters, to connect all station centers with two eccentres in a point group, to determine the vertical gradients at the station centers, and to perform an independent control in the area of the new federal states and on points with larger deviations from the earlier results. The "Institut für Erdmessung, Universitât Hannover" contributed absolute gravity measurements with JILAG-3 on five station centers. The new gravity network based completely upon absolute gravity measurements is defined as DSGN94 and the gravity results and station descriptions are presented. The accuracy of the gravity determination is estimated with ± 0.05 µm s- (± 5 µgal) for the station centers and ± 0.07µm s- (± 7 µGal) on the eccentre points. A comparison of DSGN94 and DSGN76 shows an offset of 0. 19 µm s-. A scale difference between both determinations could not be detected significantly. Numéro de notice : 60911 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=60845

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60911-01	30.10	Livre	Centre de documentation	Géodésie	Disponible

The IFE absolute gravity program "South America" 1988 - 1991 / Wolfgang Torge (1994)

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Introduction of absolute gravimetric techniques into a high-precision gracity and vertical control system in Northern Iceland / Wolfgang Torge (1992)

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Gravimetry / Wolfgang Torge (1989)

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Long range geoid control through the european GPS traverse / Wolfgang Torge (1989)

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A european astro-gravimetric geoid / J. Brennecke (1983)

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Validation of SEASAT-1 altimetry using ground truth in the North Sea Region / J. Brennecke (1982)

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Determination of 12' x 20' Mean Free Air Gravity Anomalies for the North Sea Region / Wolfgang Torge (1980)

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Geodesy / Wolfgang Torge (1980)

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Dreidimensionale Ausgleichung des Testnetzes Westharz / Wolfgang Torge (1978)

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Eichung von La Coste-Romberg-Gravimetern auf der Europäischen Gravimetereichlinie zwischen München und Bodø / Wolfgang Torge (1976)

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