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.

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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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