Absolute Gravimetry with the Hannover Meters JILAg-3 and FG5-220, and their Deployment in a Danish-German Cooperation

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  • Technical University of Denmark
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OriginalspracheEnglisch
Seiten (von - bis)149-163
Seitenumfang15
FachzeitschriftZFV - Zeitschrift fur Geodasie, Geoinformation und Landmanagement
Jahrgang133
Ausgabenummer3
PublikationsstatusVeröffentlicht - 30 Juni 2008

Abstract

Using absolute gravimetry, geodetic networks can be surveyed to realize a homogeneous gravity standard of regional to global extent and to monitor time dependent variations in the Earth's gravity field. With the receipt of the transportable free-fall gravimeter JILAg-3 at the Institut für Erdmessung (IfE, Leibniz Universität Hannover) in 1986, projects were initiated with a main objective to improve national and international gravimetric networks. Deficiencies in the definition of the absolute datum (gravimetric scale and level) could be overcome. As a second goal, absolute gravity determinations were performed to support the geodynamic research in regions where geophysical phenomena deform the Earth's surface. Presently, the FG5 gravimeter is the state-of-the-art in the measurements of absolute gravity. With the high measuring accuracy, new applications have been risen, e.g. the monitoring of environmental changes. For IfE, the FG5-220 is the second absolute meter obtained in 2002, and is the follow-up of the JILAg-3. Comparisons of results with both absolute gravimeters among themselves and with other instruments show that the results from both instruments are well adjusted to the international gravity standard. But a bias of +0.09 μm/s2 has to be considered for the JILAg-3 measurements when comparing with FG5-220 results. As a case study for an interdisciplinary long-term research, a Danish-German cooperation is described. Besides the establishment of a national gravimetric reference, a strong geophysical background characterizes the joint projects performed since 1986.

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Absolute Gravimetry with the Hannover Meters JILAg-3 and FG5-220, and their Deployment in a Danish-German Cooperation. / Timmen, Ludger; Gitlein, Olga; Müller, Jürgen et al.
in: ZFV - Zeitschrift fur Geodasie, Geoinformation und Landmanagement, Jahrgang 133, Nr. 3, 30.06.2008, S. 149-163.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Timmen, L, Gitlein, O, Müller, J, Strykowski, G & Forsberg, R 2008, 'Absolute Gravimetry with the Hannover Meters JILAg-3 and FG5-220, and their Deployment in a Danish-German Cooperation', ZFV - Zeitschrift fur Geodasie, Geoinformation und Landmanagement, Jg. 133, Nr. 3, S. 149-163. <https://geodaesie.info/zfv/heftbeitrag/586>
Timmen, L., Gitlein, O., Müller, J., Strykowski, G., & Forsberg, R. (2008). Absolute Gravimetry with the Hannover Meters JILAg-3 and FG5-220, and their Deployment in a Danish-German Cooperation. ZFV - Zeitschrift fur Geodasie, Geoinformation und Landmanagement, 133(3), 149-163. https://geodaesie.info/zfv/heftbeitrag/586
Timmen L, Gitlein O, Müller J, Strykowski G, Forsberg R. Absolute Gravimetry with the Hannover Meters JILAg-3 and FG5-220, and their Deployment in a Danish-German Cooperation. ZFV - Zeitschrift fur Geodasie, Geoinformation und Landmanagement. 2008 Jun 30;133(3):149-163.
Timmen, Ludger ; Gitlein, Olga ; Müller, Jürgen et al. / Absolute Gravimetry with the Hannover Meters JILAg-3 and FG5-220, and their Deployment in a Danish-German Cooperation. in: ZFV - Zeitschrift fur Geodasie, Geoinformation und Landmanagement. 2008 ; Jahrgang 133, Nr. 3. S. 149-163.
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