Onizuka Air Force Station (Onizuka AFS or OAFS), located in Sunnyvale, California, is a small United States Air Force facility run by the 21st Space Operations Squadron, a geographically separated unit (GSU) of the 50th Network Operations Group, 50th Space Wing, Schriever AFB, Colorado.

It began as the Air Force Satellite Test Center in 1960, became Sunnyvale Air Force Station in 1971, and was renamed Onizuka AFS in 1986 after Ellison S. Onizuka, an astronaut killed on the space shuttle Challenger.

Onizuka AFS is the backup control center for the Air Force Satellite Control Network.

Official website: http://www.onizuka.af.mil/

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