[time-nuts] A Year in the Life of Galileo´s Rubidium Clocks

Christopher Hoover ch at murgatroid.com
Wed May 23 23:39:31 EDT 2007


 

A Year in the Life of Galileo´s Rubidium Clocks

http://sidt.gpsworld.com/gpssidt/article/articleDetail.jsp?id=428265

 

 

“The measured performance of the clocks meets the specification over short
and medium timescales. A few ‘jumps’ in clock frequency have been observed,
which impact the long-term accuracy. Such frequency changes are a well known
phenomenon in rubidium clock technology but their cause is not yet well
understood. Their effect on GPS performance has already been analyzed and
corrective measures proposed.”

 

Can anyone tell me what this well-known phenomenon is?

 

-ch

 




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