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Introduction: Data Access
intro-data-access: overviewThis page gives an introduction to data access using AstroGrid services including AstroScope, Helioscope and more detailed dataset queries. Under Available Datasets you will find a summary of the methods used to access data and a list of selected datasets which can be accessed through AstroGrid. Under Data Access: Examples you will find links to examples describing how to access some of the data sets. |
Available datasetsDatasets are available via AstroGrid in several ways:
Data Discovery ServicesAstroScope and HelioScope give access to a large number of datasets from a variety of archives all around the world. They are data discovery services that only support simple queries: AstroScope allows you to search by position in the sky or object name, HelioScope by time range. The best way to find out which data you can retrieve from these services is to try a search. Datasets available via ADQL queriesOn this page we list a selection
of the datasets that are available via AstroGrid using the second
method mentioned: ADQL queries. ADQL (the "astronomers' data query
language", which uses logic similar to the Structured Query Languages
used for databases) allows you to construct more complex queries with
more complex constrains than simple position or time ranges. To
construct queries to the services listed below you need to use the Task Launcher (from the Workbench) or see Querying databases via the 2008 VO DeskTop.
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Data Access: ExamplesThis section provides some links to examples of how to access data with AstroGrid. |