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Earth as seen from the International Space Station (ISS)

About the STI Repository

Use of STI | Search Tips | Anatomy of the STI Repository

The STI Repository (NTRS)

The NASA STI Repository (NTRS) launch which was first released in 1994, provides access to metadata records, full-text documents, and videos covering aeronautics, exploration systems, science, space operations, and space technology. The types of information included are NASA STI Series reports, abstracts, book chapters and books, conference papers and presentations, contractor and grantee reports, journal articles, patents, technical reports, technical videos, and white papers – scientific and technical information (STI) created or funded by NASA.

The STI Repository (NTRS) provides access to NASA’s current and historical research. It integrates the National Advisory Committee for Aeronautics (NACA) launch , National Aeronautics and Space Administration (NASA) launch , and non-NASA collections.

  • NACA Collection: Reports from 1900 to 1958.
  • NASA Collection: Documents created or sponsored by NASA starting in 1958 and continuing to the present.
  • Non-NASA Collection: Historical metadata records of related research topics collected from a variety of non-NASA sources that are of interest to NASA researchers.

The complete STI collection of NASA and non-NASA materials is available by registration only to NASA civil servants and contractors. This collection includes over 4.4 million metadata records and over 500K full-text documents. Access to registered content is only available through the NASA Application Management System (NAMS) and requires you to have an established NASA Agency User Identity (AUID) and a NASA Launchpad password.

By maintaining the STI collection, STI Compliance and Distribution Services supports NASA’s strategic goals to:

  1. Expand the frontiers of knowledge, capability, and opportunity in space.
  2. Advance understanding of Earth and develop technologies to improve the quality of life on our home planet.
  3. Serve the American public and accomplish our Mission by effectively managing our people, technical capabilities, and infrastructure.

History of the STI Repository

  • 1961-1981: STI Facility (STIF), Washington, DC
    • Remote Console (RECON) - early automated search and retrieval system
    • Managed over 600 exchange agreements
  • 1982-2014: Center for AeroSpace Information (CASI), Hanover MD
    • NASA Aeronautics and Space Database (NA&SD)
    • Consolidated center technical report servers (TRs) with the NASA Technical Reports Server (NTRS)
    • Digitized the NASA STI print collection and sent the hardcopies to National Archives and Records Administration (NARA)
  • 2014-2020: NASA STI Program Office (STIPO), Hampton, VA
    • CASI closes and all systems and services moved to the STI Program Office at NASA Langley Research Center launch
    • Focus on NASA-funded content, eventual termination of exchange agreements for content relevant to NASA research
  • 2020-Present: NASA STI Compliance and Distribution Services, Hampton, VA

Use of STI

Please see NASA Disclaimers, Copyright Notice, and Terms and Conditions of Use for information on how to use NASA’s scientific and technical information.

Search Tips

Need help navigating the STI Repository? View our search tips !

Anatomy of the STI Repository

Explore the Anatomy of the NASA STI Repository including how to use each area within the main search and document details pages.

What is STI?

STI (scientific and technical information) is defined as a paper, abstract, journal article, presentation, etc. that contains and delivers the results (the analyses of the data, facts, and resulting conclusions) of basic and applied scientific, technical and related engineering research and development.

Types of STI