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Mission
U.S. Naval Observatory


The U.S. Naval Observatory (USNO) serves as DoD's authoritative source for the positions and motion of celestial bodies, motions of the Earth, and precise time.  USNO provides tailored products, performs relevant research, develops leading edge technologies and instrumentation, and operates state of the art systems in support of the U.S. Navy, DoD, Federal Agencies, international partners, and the general public.

 
 
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