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Earth as seen from the International Space Station (ISS)

What is Registered Content?

NASA STI Repository Registered Content (formerly referred to as NTRS-R or NTRS-Registered) contains:

The complete STI collection of NASA and non-NASA aerospace materials and is available by registration only to U.S. Government civil servants, contractors, and grantees

  • Over 4.3 million metadata records

  • Over 500K full-text PDF images

  • Saved search capabilities