First Impressions on Updates of the AGrav Database
21/09/2016 | 16:45 | Session 4: Global gravity field modelling
Author(s): Hartmut Wziontek, Reinhard Falk and Sylvain Bonvalot
Hartmut Wziontek, Reinhard Falk and Sylvain Bonvalot
The International Database for Absolute Gravity Measurements "AGrav" is operated jointly by BGI and BKG and is hosted at two mirrored servers in Toulouse (France) (http://bgi.get.obs-mip.fr/) and Frankfurt/Main (Germany) (http://agrav.bkg.bund.de/). Not only the web application is currently under a major revision. One important aspect is to accommodate the demands of the new global absolute gravity reference system as recommended by the IAG Resolution No. 2 adopted in Prague 2015.
As intercomparisons of absolute gravimeters (AG) are essential to realize a precise and uniform gravity standard, the database is extended to document the results of international and regional comparisons, including those performed at monitoring stations equipped with SGs. In this way it will be possible to link different AGs and to trace their equivalence to the international intercomparisons under the auspices of International Committee for Weights and Measures (CIPM) as the best metrological realization of the absolute gravity standard.
A new web application frame work based on Pyramids will provide a modernized and user friendly access to database contents. An updated interactive map allows to categorize station dependent on networks. The database engine itself will be migrated to PostgreSQL. A new report generator will allow to represent station information and measurement results in a uniform way. First impressions of these changes will be presented.