The DoD time reference, the U.S. Naval Observatory Master Clock, is backed up by the Alternate Master Clock pictured here at Schriever Space Force Base, Colorado, Oct. 27, 2023. The Master Clock in Washington, D.C. and the Alternate Master Clock at Schriever SFB are both disciplined to a timescale compromised of signals from multiple atomic clocks. Most users receive this time through the Global Positioning System. (U.S. Space Force photo by Airman 1st Class Justin Todd)
This work, Alternate Master Clock at Schriever SFB [Image 14 of 14], by A1C Justin Todd, identified by DVIDS, must comply with the restrictions shown on https://www.dvidshub.net/about/copyright.
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Alternate Master Clock at Schriever SFB
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