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E-science grid facility forEurope and Latin America
LAGOVirtualA Collaborative Environment for the Large Aperture GRB observatory
Rodrigo Torréns
Centro Nacional de Cálculo Científico
Universidad de Los Andes
Parque Tecnológico de Mérida
2nd EELA-2 Conference
25-27 November 2009
Choroní, Venezuela
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LAGOVirtual
–LAGOVirtual is an ongoing project to develop a platform to collaborate, in the Large Aperture GRB Observatory (LAGO).
This continental-wide observatory is devised to detect high energy component of Gamma Ray Bursts, by using the single particle technique in arrays of Water Cherenkov Detectors (WCD) at high mountain sites:
-Chacaltaya, Bolivia, 5300 m a.s.l., -Pico Espejo, Venezuela, 4750 m a.s.l., -Sierra Negra, Mexico, 4650 m a.s.l.-Malargue and Bariloche, Argentina
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LAGOVirtual
LAGOVirtual will have four modules:
1. Remote access to the detectors2. Access to the AIRES, (system for air shower
simulations and ROOT data analysis tool).3. Access to distributed data files. 4. Access to distributed document files.
We are working in the module of distributed repositories of data files (3).
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Data Repositories
• The first initiatives were Pre-prints repositories in HEP (Los Alamos archive: arXiv.org)
• With this initiative started the Open Access movement• Networks of institutional repositories are being
constructed worldwide
But…
• Every year the data from the High Energy Physic experiments are lost or not accesible (as in other areas)
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Data Repositories
• It is essential that results of experiments remain accessible for accountability, re-analysis, and training of future generations.
• These needs have moved forward the Open Data Movements and the construction of...
Data Repositories
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LAGO Data Repositories
• The LAGO Data Repositories (LAGO-DR) will allow the collaboration to share data captured by the WCD and/or generated by simulations.
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LAGO-DRWCD
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LAGO Data Repositories
• Researchers at each institution-country can self archive data files generated by the project instruments
• They can also create automatic entries and files for bulk data load.
• Value added services could be generated: federated search, data replication, data analysis between sites...
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Data and metadata structure
Data for LAGO are classified mainly into three types:
• instrument calibration data
• datasets captured by the WCD instruments
• data simulated by the AIRES application.
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Data and metadata structure
• Each data file is described by a metadata element set specifically adapted to LAGO.
• The metadata model we propose for LAGOvirtual is an adaptation of the model raised for the CCLRC*, and Dublin Core standard elements
*Council for the Central Laboratory of the Research Councils. UK
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Data and metadata structure
The existence and implementation of a scientific metadata standard model will allow:
• an uniform access to data for all the members of LAGO collaboration,
• the interoperability between scientific information systems, and also ....
• contribute to the data preservation and its usability in time.
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LAGOvirtual system
For LAGOVirtual …• We have developed a prototype based on DSpace
software
• DSpace is an open source software that enables open sharing of many types of content, generally used for document institutional repositories.
• Members of the project can upload individual data files using a Web interface, or can use bulk load mechanism
• The system allows to describe each data file using standarized metadata schema
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LAGOvirtual user interface
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LAGOvirtual user interface
Item Metadata
Item associated
files
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LAGOvirtual user interface
Data file
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Plot related with data file
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Thanks!!
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(Photo: X. Bertou)
