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Modeling atmospheric refraction influences by optical turbulences using an image-assisted total station / Alexander Reiterer 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 156 - 165 Titre : Modeling atmospheric refraction influences by optical turbulences using an image-assisted total station Type de document : Article/Communication Auteurs : Alexander Reiterer, Auteur Année de publication : 2012 Article en page(s) : pp 156 - 165 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Topographie [Termes IGN] instrument d'optique [Termes IGN] modèle atmosphérique [Termes IGN] propagation du signal [Termes IGN] réfraction atmosphérique [Termes IGN] tachéomètre électronique [Termes IGN] turbulence Résumé : (Auteur) A large part of geodetic sensor systems use electromagnetic radiation to determine the measurement values (distances, directions, etc.). The geometry of the path of propagation and the velocity of the electromagnetic wave is strongly influenced by the physical state of the atmosphere. As most geodetic measurements are performed in the lower atmosphere, the study of refraction and of corresponding impact constitutes a key research field. In geodesy, the refractive index represents a common way to describe the terrestrial refraction - the literature refers to different methods for determining this value. Our study presents a method for the determination of the influence of refraction on the basis of optical measurements. The mathematical derivation is based on well-known equations - the combination of different approaches leads to a uniform processing sequence which can easily be implemented. We present the theoretical foundations, details about the implementation and some preliminary tests. Numéro de notice : A2012-268 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31714 [article]

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

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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Current activities of International Association of Geodesy (IAG) as the successor organisation of the Mitteleuropäische Gradmessung / Hermann Drewes 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 175 - 184 Titre : Current activities of International Association of Geodesy (IAG) as the successor organisation of the Mitteleuropäische Gradmessung Type de document : Article/Communication Auteurs : Hermann Drewes, Auteur Année de publication : 2012 Article en page(s) : pp 175 - 184 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie [Termes IGN] activité géodésique [Termes IGN] Association internationale de géodésie [Termes IGN] histoire de la cartographie [Termes IGN] histoire des sciences et techniques Résumé : (Auteur) The International Association of Geodesy (IAG) is a constituent Association of the International Union of Geodesy and Geophysics (IUGG) since 1922, and the successor organization of the Mitteleuropäische Gradmessung. Its activities have changed dramatically from its beginning in 1862 till today. While it started with the aim of determining the regional anomalies of the Earth's curvature in Europe by connecting astronomical observatories through triangulation networks, it concentrates now on the observation and modelling of the phenomena and effects of physical processes in the System Earth employing mainly space techniques. The structural and scientific developments over time are summarised, and the present structure and activities are described in detail. Numéro de notice : A2012-270 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31716 [article]

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

Einsatz der Atominterferometrie in der Geodäsie / M. Schilling 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 185 - 194 Titre : Einsatz der Atominterferometrie in der Geodäsie Type de document : Article/Communication Auteurs : M. Schilling, Auteur ; J. Muller, Auteur ; Ludger Timmen, Auteur Année de publication : 2012 Article en page(s) : pp 185 - 194 Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Géodésie physique [Termes IGN] atome [Termes IGN] gravimétrie [Termes IGN] interféromètre au laser Résumé : (Auteur) The interferometry of mater waves, i.e. the exploitation of the wave characteristics of matter by manipulating the internal states of atoms with lasers, is of increasing interest for geodesy. This article gives a short introduction in the theoretical background of atom interferometry and describes possible applications in geodesy with emphasis on gravimetry. The limiting factors of state-of-the-art relative and absolute gravimeters are presented. The potential of the new technology is discussed. Particular attention is paid to the operation outside of controlled laboratory environments, an important prerequisite for future use in geodesy. Numéro de notice : A2012-271 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31717 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
199-2012031	RSREV	Revue	Centre de documentation	Revues en salle	Disponible