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| Titel |
New design and facilities for the International Database for Absolute Gravity Measurements (AGrav): A support for the Establishment of a new Global Absolute Gravity Reference System |
| VerfasserIn |
Hartmut Wziontek, Reinhard Falk, Sylvain Bonvalot, Axel Rülke |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250150553
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| Publikation (Nr.) |
 EGU/EGU2017-15025.pdf |
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| Zusammenfassung |
| After about 10 years of successful joint operation by BGI and BKG, the International
Database for Absolute Gravity Measurements "AGrav" (see references hereafter) was under a
major revision. The outdated web interface was replaced by a responsive, high
level web application framework based on Python and built on top of Pyramid.
Functionality was added, like interactive time series plots or a report generator and the
interactive map-based station overview was updated completely, comprising now
clustering and the classification of stations. Furthermore, the database backend was
migrated to PostgreSQL for better support of the application framework and long-term
availability.
As comparisons of absolute gravimeters (AG) become essential to realize a precise and
uniform gravity standard, the database was extended to document the results on international
and regional level, including those performed at monitoring stations equipped with SGs. By
this it will be possible to link different AGs and to trace their equivalence back to the key
comparisons under the auspices of International Committee for Weights and Measures
(CIPM) as the best metrological realization of the absolute gravity standard. In this way the
new AGrav database accommodates the demands of the new Global Absolute Gravity
Reference System as recommended by the IAG Resolution No. 2 adopted in Prague
2015.
The new database will be presented with focus on the new user interface and new
functionality, calling all institutions involved in absolute gravimetry to participate and
contribute with their information to built up a most complete picture of high precision
absolute gravimetry and improve its visibility. A Digital Object Identifier (DOI) will be
provided by BGI to contributors to give a better traceability and facilitate the referencing of
their gravity surveys.
Links and references:
BGI mirror site :
http://bgi.obs-mip.fr/data-products/Gravity-Databases/Absolute-Gravity-data/
BKG mirror site: http://agrav.bkg.bund.de/agrav-meta/
Wilmes, H., H. Wziontek, R. Falk, S. Bonvalot (2009). AGrav – the New Absolute
Gravity Database and a Proposed Cooperation with the GGP Project. J. of Geodynamics, 48,
pp. 305-309. doi:10.1016/j.jog.2009.09.035.
Wziontek, H., H. Wilmes, S. Bonvalot (2011). AGrav: An international database for
absolute gravity measurements. In Geodesy for Planet Earth (S. Kenyon at al. eds). IAG
Symposia, 136, 1035-1040, Springer, Berlin. 2011. doi:10.1007/978-3-642-20338-1_130. |
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