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Proceedings of the Workshop IMG-2002 / Olivier Francis (2003)

Public Titre : Proceedings of the Workshop IMG-2002 : Instrumentation and metrology in gravimetry, October 28-30, 2002, Munsbach Castle (Grand-Duchy of Luxemburg) Type de document : Actes de congrès Auteurs : Olivier Francis, Éditeur scientifique ; Tonie M. van Dam, Éditeur scientifique ; European Centre for Geodynamics and Seismology ECGS (Luxembourg), Auteur ; Bureau international des poids et mesures , Auteur Editeur : Luxembourg : Conseil de l'Europe Année de publication : 2003 Collection : Cahiers du Centre Européen de Géodynamique et de Séismologie num. 22 Conférence : IMG 2002, Instrumentation and metrology in gravimetry 28/10/2002 30/10/2002 Schuttrange Grand Duché du Luxembourg Importance : 179 p. Format : 16 x 23 cm ISBN/ISSN/EAN : 978-2-9599804-9-7 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique [Termes IGN] Europe (géographie physique) [Termes IGN] géophysique interne [Termes IGN] gravimétrie [Termes IGN] instrument de géodésie [Termes IGN] métrologie [Termes IGN] Seismologie Note de contenu : * James E. Faller -- Instrumentation for Old Gravity * T.M. Niebauer, D. Van Westrum, J.M. Brown, F.J. Klopping, M.A. Ravine -- New Absolute Gradiometer * Y.M. Zanimonskiy, J. Krynski, V.D. Nagornyi, A.V. Omelchenko, A. Sas-Uhrynowski -- On the Optimal Measuring Strategy for Ballistic Gravimeter * L. Vitushkin, Z. Jiang, M. Beeker, O. Francis -- Sixth International Comparison of Absolute Gravimeters, ICAG-2001 * O. Francis, T. van Dam -- Processing of the Absolute Data of the 1CAG01 * M. Becker, Z. Jiang, L. Vitushkin -- Adjustment of Gravity Measurements at the Sixth International Comparison of Absolute Gravimeters ICAG-2001 * J. Liard, J. Henton, C. Gagnon, A. Lambert, N. Courtier -- Comparison of Absolute Gravimeters Using Simultaneous Observations * M. Van Camp, M. Hendrickx, P. Richard, S. Thies, J. Hinderer, M. Amalvict, B. Luck, R. Falk -- Comparisons of the FG5#101, #202, #206 and #209 Absolute Gravimeters at four Different European Sites * S. Mizushima, A. Ooiwa -- Realization of Reliable Gravity Measurement at the NMIJ/AIST * M. Vermeer -- Ideas on a Consistent Conceptual Framework for Tidal Reductions in Gravity, Geopotcntial and Positioning * V. Palinkas, P. Kaspar, M. Lederer -- Effect of the Magnetic Field on LCR Gravimeters * M. Van Camp -- Man-induced Subsidence in Jülich Observed by the FG5 # 202 Absolute Gravimeter in a Noisy Environment * M. Van Camp -- Efficiency of Tidal Corrections on Absolute Gravity Measurements at the Membach Station * D. Simon -- The extreme Warming of the Northern Polar Stratopause in February 1998 and its Effect on the Gravity Field in Europe and North America * G. Durando, A. Germak -- A New Method of Acquiring Data of Absolute Gravimeter * G. D'Agostino, S. Desogus, G. Durando, A. Germak, C. Origlia -- Improvements of IMGC Absolute Gravimeter * W. Zürn, R. Widmer-Schnidrig -- Vertical Acceleration Noise at Seismic Frequencies * J. Krynski, A. Sas-Uhrynowski, L. Siporski -- Verification of the Absolute Gravity Measurements in Poland * J. Hinderer, M. Sedighi, R. Bayer, K. Ghazavi, M. Amalvicl, B. Luck, F. Nilforoushan, F. Masson, F. Tavakoli. M. Peyret, Y. Djamour, A. Kouhzare, H. Nankali -- The Absolute Gravity Network in Iran: an Opportunity to Analyse Gravity Changes Caused by Present-Day Tectonic Deformation * T. Sato, Y. Tamura, K. Matsumoto, K. Asari, H.-P Plag, T.M. van Dam, O. Francis. -- Comparison Between Modeled and Observed Gravity Tidal Parameters at Ny-Alesund, Svalbard * D. Simon -- The Global Field of Gravity Variations Induced by the Seasonal Warming/Cooling of Atmospheric Air Masses * P. Medvedev, V. Nepoklonov -- New Results of Geoid and Gravity Field Model Determinations in Russia * D.L. Schmerge -- The Application of Microgravimetry to Aquifer-Storage Change Monitoring * J. Verdun, E.E. Klingelé, M. Cocard, A.Geiger, R. Bayer -- Airborne Gravity Measurements Using a LaCoste & Romberg Air-Sea Gravity Meter Numéro de notice : 30094 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Actes Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=35095

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• Airborne gravity mesasurements using a LaCoste & Romberg air-sea gravity meter / Alain Geiger (2002)

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Airborne gravity mesasurements using a LaCoste & Romberg air-sea gravity meter / Alain Geiger (2002)

Public contenu dans Proceedings of the Workshop IMG-2002 / Olivier Francis (2003) Titre : Airborne gravity mesasurements using a LaCoste & Romberg air-sea gravity meter Type de document : Article/Communication Auteurs : Alain Geiger, Auteur ; Jérome Verdun , Auteur ; Emile E. Klingelé, Auteur ; Marc Cocard, Auteur Editeur : Luxembourg : Ministère de la culture, de l'enseignement supérieur et de la recherche Année de publication : 2002 Conférence : IMG 2002, Instrumentation and metrology in gravimetry 28/10/2002 30/10/2002 Schuttrange Grand Duché du Luxembourg Importance : pp 167 - 176 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique [Termes IGN] cohérence des données [Termes IGN] filtrage du bruit [Termes IGN] fréquence [Termes IGN] gravimètre [Termes IGN] gravimétrie spatiale Résumé : (Auteur) This paper introduces a now ap-proach to airborne gravity data reduction well-suited for survey flown at high altitude with respect to gravity sources (mountainous areas). Classical technique is reviewed and illustrated in taking advantage of airborne gravity measure-ments performed over the western French Atps by using a. LaCoste&Romberg air-sea gravity meter. The part of non-gravitational vertical ac-celerations correlated with gravity meter mea-surements are investigated with the help of co-herence spectra. Beam velocity haw proved to be strikingly correlated with vertical acceleration of the aircraft. This finding is theoretically argued by solving the equation of the gravimetric sys-tem (gravity meter and stabilized platform). The transfer function of the system is derived and a new formulation of airborne gravity data reduc-tion, which takes care of the sensitive response of spring tension to observable gravity field wave-lengths, is given. The resulting gravity signal ex-hibits a residual noise due to electronic devices and short-wavelength Eötvös effects. The use of dedicated exponential filters gives us a way to eliminate these high-frequency effects. Examples of the resulting free-air anomaly at altitude 5100 m along one particular profile are given and com-pared with free-air anomaly deduced from the classical method for processing airborne gravity data, and with upward-continued ground gravity data. Numéro de notice : C2002-019 Affiliation des auteurs : LAREG+Ext (1991-2011) Thématique : POSITIONNEMENT Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=64977