Atlas IIA | UHF F/O F9
Launch Successful
L - -- : -- : -- : --
Instantaneous launch window.
Launch Window
Oct. 20, 1998, 7:19 a.m. - Oct. 20, 1998, 7:19 a.m.
Instantaneous launch window.
Oct. 20, 1998, 7:19 a.m. - Oct. 20, 1998, 7:19 a.m.
The U.S. Navy began replacing and upgrading its ultra-high frequency (UHF) satellite communications network during the 1990s with a constellation of customized satellites built by Hughes Space and Communications Company. Known as the UFO (Ultra High Frequency Follow On) series, these HS-601 model satellites support the Navy's global communications network, serving ships at sea and a variety of other U.S. military fixed and mobile terminals.
Atlas II was a member of the Atlas family of launch vehicles, which evolved from the successful Atlas missile program of the 1950s. It was designed to launch payloads into low earth orbit, geosynchronous transfer orbit or geosynchronous orbit. Sixty-three launches of the Atlas II, IIA and IIAS models were carried out between 1991 and 2004; all sixty-three launches were successes, making the Atlas II the most reliable launch system in history.
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