[time-nuts] A Year in the Life of Galileo´s Rubidium Clocks
Christopher Hoover
ch at murgatroid.com
Thu May 24 03:39:31 UTC 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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