Transcript The NVO Portal T US N V

THE US NATIONAL VIRTUAL OBSERVATORY
The NVO Portal
Tom McGlynn, NASA/GSFC
Gretchen Greene, ST ScI
John Good, IRSA/IPAC
Roy Williams, CACR/Caltech
Mike Fitzpatrick, NOAO
Purpose
Make it easy for astronomers to find useful
information in the VO
• Accommodate many different kinds of
searches
• Web interface with no required
downloads
• Easy linkage between Web and scripting
capabilities
• No VO jargon
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Design
• Collaborating, distributed, simple elements
• Standard protocol for transmitting information
between elements:
• List of sources
• List of resources
– All VOTables
• Elements call each other as appropriate with
many starting points.
• Common templates and vocabulary
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Data Discovery Portal (concept)
Table Viewer
Registry
Inventory
Collector
Integrator
Command
Line
Table
Translator
Help
More Tools
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Current Portal Home Page
http://heasarc.gsfc.nasa.gov/vo/portal/
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Portal help
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Registry
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Registry
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Registry
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Registry SearchMe -> Table
Viewer
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Table Viewer: Display …
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TableViewer: … and Filter
ASCII File
XML File
VIM Service
Inventory Service
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Table Viewer: … and plot
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Viewer sends table to Inventory
Find resources
with data near list
of positions
.
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Inventory Service: View a result
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Build up table with VIM Integrator
See Roy’s talk later today.
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VIM Integrator: Getting lists of
images
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DataScope Collector: single
source
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Collector: Main page
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Collector: Resource summary
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Collector  Aladin
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VOClient: Command Line Search
and retrieval
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VOClient capabilities
• VORegistry: search the registry
• VOSesame: Name resolver
• VOData: Query resources at a single or
multiple positions
cat list | vodata -q -V -X -O - -p - -rd 1.4 \
ivo://nasa.heasarc/skyview/neat
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Table formatter
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Table
Wizard
See John
McQ’s talk
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Key elements
• Common template -> coherent
environment
• Common JavaScript/XSLT VOTable
processing
– Potentially useful in any Web app that displays VOTables.
• Standard formats for passing information
among elements.
• VOClient used within inventory, table
viewer as well as by users.
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Status and Plans
• All elements functional
• Alpha release for comment and testing
– http://heasarc.gsfc.nasa.gov/vo/portal and
links therein
• Registry inconsistencies can lead to
services not being found.
• Further work in eliminating jargon and
smoothing user experience.
• Beta release to public soon.
• Please send comments!
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