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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) provides access to aerospace-related citations, full-text online documents, images, and videos. The types of information included are: conference papers, journal articles, meeting papers, patents, research reports, images, movies, and technical videos – scientific and technical information (STI) created or funded by NASA.

The STI Repository (NTRS) integrates the National Advisory Committee for Aeronautics (NACA) and NASA collections. The NACA collection includes reports from 1900 to 1958 and the NASA collection includes documents created or sponsored by NASA starting in 1958 and continuing to the present.

The complete STI collection of NASA and non-NASA aerospace materials is available by registration only to NASA civil servants and contractors. This collection includes over 4.3 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, the STI Program 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.

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