AGrav—The New International Absolute Gravity Database of BGI and BKG and its benefit for the Global Geodynamics Project (GGP) |
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| Institution: | 1. Bundesamt für Kartographie und Geodäsie (BKG), Richard-Strauss-Allee 11, D-60598 Frankfurt a.M., Germany;2. Bureau Gravimétrique International (BGI), Observatoire Midi-Pyrénées, 14-16 Avenue Edouard Belin, F-31401 Toulouse Cedex 4, France;1. School of Biosciences, Cardiff University, Cardiff CF10 3AX, United Kingdom;2. Department of Ecology, Faculty of Science, Charles University, Prague, Vini?ná 7, CZ-12844 Prague 2, Czech Republic;3. Centre for Environment, Fisheries and Aquaculture Science (Cefas), The Nothe, Weymouth, Dorset DT4 8UB, United Kingdom;1. School of Physics and Electronic Information Engineering, Henan Polytechnic University, China;2. State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, China;3. School of Information and Engineering, Zhengzhou University, China;4. Wireless Telecommunications Research Group, Federal University of Ceara, Fortaleza, Brazil;1. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430070, China;2. RISE Project, National Astronomical Observatory of Japan, Oshu 0230861, Japan;3. Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430070, China;4. Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 20030, China;5. NASA Ames Research Center, Mail Stop 239-20, Moffett Field, CA 94035, USA;6. The University Museum, The University of Tokyo, Tokyo 1130033, Japan |
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| Abstract: | A new database for absolute gravity (AG) measurements has been implemented at BGI and BKG and is operational now for storing absolute gravity data either in the form of metadata or as detailed measurement results. The database development was proposed by the IGFS (International Gravity Field Service) and is expected to have a great importance for the GGOS (Global Geodetic Observing System) initiative. This database will provide an overview about AG stations and observations and by this improve the cooperation between gravity groups and foster the combination with other geodetic observation techniques. The international community of absolute gravimeter users is asked to contribute to this database.In addition to its primary purposes, demonstration of the global site distribution and information about available observations, the database could also provide an important contribution to the Global Geodynamics Project (GGP). Precise repeated absolute gravity measurements at the superconducting gravimeter (SG) sites are necessary for the determination of SG drift parameters and can be used for checking SG instrument calibration factors. The AGrav database is capable of storing the necessary AG observations at the SG location in detail up to the “single drop level” and provides this information for the combination with SG time series. An example for a selected station is presented. It is proposed to establish an interface between the AGrav and GGP databases. |
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