Publications (FIS)

Comparisons of Absolute Gravimeters as a Key Component of the International Terrestrial Gravity Reference Frame (ITGRF) Shown on the Example of the WET-CAG2021 at Wettzell, Germany

authored by
Hartmut Wziontek, Reinhard Falk, Vojtech Pálinkáš, Andreas Engfeldt, Julian Glässel, Andreas Hellerschmied, Domenico Iacovone, Jakub Kostelecky, Marvin Reich, Ludger Timmen, Christian Ullrich, Alessandro Valluzzi, Barbara Zehetmaier
Abstract

Comparisons of absolute gravimeters are essential to guarantee their traceability to the International System of Units (SI) and their compatibility and will be a key component of the upcoming International Terrestrial Gravity Reference Frame (ITGRF) of IAG. The results of the regional comparison of absolute gravimeters WET-CAG2021 hosted at the Geodetic Observatory Wettzell, Germany, in autumn 2021 are presented. Seven FG5/X absolute gravimeters and—for the first time—two commercial AQG absolute quantum gravimeters took part. Temporal gravity variations during the comparison period of 12 weeks were monitored with the superconducting gravimeter GWR OSG-030. The equivalence of each absolute gravimeter is evaluated against a common reference level derived from the measurements during this comparison period. Although the comparison is outside the scope of CIPM MRA it is linked to the EURAMET.M.G-K3 2018 at the same site and the CM.G-K2.2017 in Beijing, China, which ensures the traceability.

Organisation(s)
Institute of Geodesy
External Organisation(s)
Federal Agency for Cartography and Geodesy (BKG)
Research Institute of Geodesy, Topography and Cartography, Czech Republic
Lantmäteriet - The Swedish Mapping, Cadastral, and Land Registration Authority
Federal Office of Metrology and Surveying (BEV)
Agenzia Spaziale Italiana (ASI)
Helmholtz Centre Potsdam - German Research Centre for Geosciences (GFZ)
Type
Conference contribution
Pages
29-36
No. of pages
8
Publication date
2023
Publication status
Published
Peer reviewed
Yes
ASJC Scopus subject areas
Computers in Earth Sciences, Geophysics
Electronic version(s)
https://doi.org/10.1007/1345_2023_226 (Access: Open)