USNO Clock Vault, Washington, DC
A Brief History of USNO Timekeeping
Precise Time & the USNO Master Clock
The USNO Time Scale
International Time Scales and the BIPM
Definitions of Systems of Time at USNO
Top
| The USNO Master Clock |
What Time Is It?
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GPS and Other Timing Operations
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Automated Data Service
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Computer Time Services
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Two-Way Satellite Time Transfer
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PTTI Meeting
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"Time is a great teacher, but unfortunately it kills all its pupils."
-Hector Berlioz
