Launch Videos

The following links open YouTube in a separate window. The U.S. government's use of YouTube as a distribution channel for online video content does not constitute an endorsement of any products, services, or views of YouTube, its advertisers, or its users.

Learn more about the various generations of GPS satellites -- Blocks II/IIA, IIR, IIR(M), IIF, and III -- at the Space Segment page. Go there

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