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Rots RDAP11 Data Archives in Federal Agencies
 

Rots RDAP11 Data Archives in Federal Agencies

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Arnold Rots, VAO; Data Archives in Federal Agencies; RDAP11 Summit ...

Arnold Rots, VAO; Data Archives in Federal Agencies; RDAP11 Summit

The 2nd Research Data Access and Preservation (RDAP) Summit
An ASIS&T Summit
March 31-April 1, 2011 Denver, CO
In cooperation with the Coalition for Networked Information
http://asist.org/Conferences/RDAP11/index.html

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    Rots RDAP11 Data Archives in Federal Agencies Rots RDAP11 Data Archives in Federal Agencies Presentation Transcript

    • Preservation of Astronomical Data Arnold Rots Smithsonian Astrophysical Observatory Virtual Astronomical Observatory
    • Context
      • I am Archive Astrophysicist for the Chandra Data Archive
        • Chandra is an X-ray telescope, one of NASA’s great observatories
      • The CDA is operated by the Smithsonian Astrophysical Observatory under contract with NASA
        • Here are right away two separate federal masters
        • As such it is one of the NASA astrophysics data centers
      • But I am also the lead for Data Curation and Preservation for the Virtual Astronomical Observatory
        • The CDA is compliant with VAO standards
      • The VAO is a member of the International Virtual Observatory Alliance
    • The Astronomical Data Universe
      • International Virtual Observatory Alliance
      • Virtual Astronomical Observatory (USA)
      • Chandra Data Archive
    • The Other Data Universe
      • Smithsonian Institution
      • Smithsonian Astrophysical Observatory
      • Chandra Data Archive
    • Our Complex Relations
      • As an observatory data archive we have multiple federal masters:
        • Smithsonian Institution
        • NASA
        • NSF (through VAO)
      • And more non-federal masters:
        • IVOA
          • Interoperability standards and protocols
        • US user community
        • International user community
      • Bright points:
        • No privacy issues
        • No national security issues
        • No commercial value
    • The Smithsonian Side
      • SI is going digital
      • There is a world of difference between collections and scientific research data
      • On the one hand our experience is valuable for the non-research units
      • On the other hand, there are legitimate differences in approach and requirements
    • Virtual Observatory
      • Objective:
        • Make all astronomical data seamlessly accessible
        • Provide analysis tools
      • This requires:
        • Interoperability standards: metadata and protocols
            • Ubiquity of FITS data file format helps
        • Development of general tools
      • IVOA
        • Standards authority
        • Collaborative consortium of national VO organizations
      • VAO
        • USA member of the IVOA
        • NSF & NASA-funded collaboration of nine institutions
    • VAO: Virtual Astronomical Observatory
      • Standards and protocols
        • Collaborating in the IVOA framework
      • Tools development
        • Compliant with IVOA standards, US priorities, IVOA-coordinated
      • User support
        • Documentation, portal, …
      • Operations
        • Provides the necessary framework
      • Technology assessment
        • What technologies do we use/introduce?
      • EPO
      • Data Curation and Preservation
    • VAO DC&P Components
      • Mission/Observatory data archives
        • NASA centers: more or less OAIS- and TDR-compliant
        • For CDA, we keep it all (all versions, multiple copies) on spinning disk
      • Contributed datasets
        • This is a problem area
      • Bibliographic repository
        • The Astrophysics Data System (ADS) has the entire astronomical literature (excepting books) online for the entire international community
      • Semantic linking
        • Linking datasets with datasets, papers with papers, datasets with papers; another problem area; Dataset Identifiers
        • Discovery tools
    • Ontology/Semantic Linking
      • Triplestore prototype discovery tool:
      • http://adslabs.harvard.edu/semantic/publications.html
      • Just a factoid from collecting bibliographic links:
        • The amount of Chandra data published each year is the equivalent of 5-6 years of observations
    • Challenges (and some solutions)
      • Data Management Plans
        • We have experience, we will provide guidance and support
      • Establish public repositories
        • If you want people to contribute datasets, you have to give them a place to put them; who is going to provide/run this?
      • Funding
        • DMPs should help here; beware of unfunded mandates
      • Make distributed repositories interoperate and transparently look like one
        • This is easier for the established mission/observatory archives than for repositories of contributed datasets
      • Define metadata requirements
        • Probably the most crucial challenge
    • More Challenges
      • Get users to contribute their datasets
        • Highly processed products; data behind the plots and figures
        • One has to make this easy: special tools needed
      • Get the users to provide adequate and correct metadata
        • Even harder; but also even more important *
      • Get users to provide links
        • Equally hard; but essential for semantic data discovery
      • These three need to be part of the manuscript submission process
          • * AVM standard for astronomical Jpegs is a step in the right direction
    • And More Challenges
      • Get the community to release research data
        • Not a problem for NASA-funded data
        • The NSF DMP requirement is a good step forward
        • The culture is changing, but private institutions are problematic
      • OAIS compliance will probably come around naturally
      • Agency IT standards and requirements
      • Certification as a Trusted Digital Repository
        • It is harder to convince people that this is a good thing
        • But it may come to be required at some point
    • Repository Requirements
      • A Trusted Digital Repository should provide these services:
        • Storage
        • Standardized metadata
        • Access
        • Authorization
        • Provenance
        • Curation
        • Authentication
        • Policy enforcement
    • Repository Requirements
      • Preservation metadata need to cover:
        • Authenticity
        • Original arrangement
        • Integrity
        • Chain of custody and history
        • Trustworthiness
      • Data processing, archiving, and all else will cease at some point, but there are three areas that will never be finished:
        • Preservation
        • User support
        • User interface development
      • Preservation of software?