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AGrav - Establishing a Database for Absolute Gravity Observations Herbert Wilmes, Hartmut Wziontek, Reinhard Falk Federal Agency for Cartography and Geodesy, Frankfurt (BKG)Sylvain Bonvalot Bureau Gravimétrique International, Toulouse (BGI)NKG Working Group for Geodynamics Copenhagen, Denmark, 23 – 24 April 2008
Complemented by other instrument types: e.g. JILA-G, A10, IMGC, GABL, Faller etc.
Value of the data grows! Long-term availability of absolute gravity data ?
AG observations by BKG, 1993 - 2006
Observations with FG5 absolute gravimeters
Courtesy: S. Kenyon
Need more co-located observatories (VLBI, Laser, GPS, abs.grav., …)
Many regional initiatives - ECGN/Europe, NGOS/Nordic ..) ..
International Gravimetric Bureau
Absolute Gravity Database
BKG database prototype installed & tested at BGI (S. Bonvalot, visit of H. Wziontek – Oct. 2007) – Additional functionalities
Worldwide data collection in progress at BGI
Two mirror sites : BGI & BKG
Access to meta-database or detailed processing results with one user interface:
Acquisition and Processing Software” (g-Soft) by Micro-g/LaCoste already meet these requirements!Since most of the AG operators use g-Soft, the preparation is a by-product of standard processing, no additional is necessary! Other users can generate such a file easily.
“g”-Software project file
The project files are uploaded to the server and information stored in the data-base.
If meta-data was chosen, all gravity related information is deleted. Script output helps to identify possible inconsistencies.
The data can be edited manually after upload.
Database available for the NGOS community to include AG data and work with the database as individual institution or as a group.
Comments and proposals are welcome!