TAG: rubidium atomic clock

Galileo clock anomalies under investigation

January 19, 2017By
Rubidium atomic clock, or RAF.

The European Space Agency today issued a press release addressing the Galileo clock failures reported Wednesday. GPS World Innovation editor Richard Langley provided the following summary of the satellites and clocks involved, based on information we have received to date. 5 satellites affected: 3 IOVs, 2 FOCs Total of 10 failures; 1 fixed; so 9 continuing failures 5 masers on... read more

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The Internet of Everything: It’s All in the Timing

June 10, 2015By

40th Annual NIST Time and Frequency Metrology Seminar
The NIST T&F Metrology Seminar is one of a kind — easily the best in the world for time and frequency metrology. There are so many exciting discoveries concerning time and how time applies to our everyday lives, especially to GPS — all PNT systems actually. Consider that the NIST Time and Frequency distribution system delivers NIST Internet time over the Internet at the rate of 8 billion requests per day from servers at 25 locations across the United States. And that's just the beginning of this tale as old as time. read more

Power Loss Created Trouble Aboard Galileo Satellite

July 8, 2014By and

In an update to our July 2 story (recapped below), correspondent Peter de Selding wrote in Space News on July 3 that the trouble aboard the fourth in-orbit (IOV) Galileo satellite arose from a sudden, unexpected loss of power. The power outage flashed on May 27, shutting down the satellite’s E1 signal. The signal “re-established itself almost immediately. But as... read more