); SAEximRunCond expanded to false
Errors-To: [EMAIL PROTECTED]
In message: <[EMAIL PROTECTED]>
"Tom Van Baak" <[EMAIL PROTECTED]> writes:
: ); SAEximRunCond expanded to false
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:
: > In the article "OBSERVATIONS ON STABILITY MEASUREMENTS
: > OF COMMERCIAL ATOMIC CLOCKS", Pekka Eskelinen claims to
: > have measured a phase temperature coefficient of 100ns/degree
: > for commercial Cs clocks in 1999.
:
: Something is wrong with that claim. There's no way a modern
: cesium standard exhibits a phase shift of 100 ns for a one
: degree change in ambient temperature. I have Cs standards
: that often change in temperature by several degrees and still
: keep to nanoseconds. I guess I need to decode that paper
: and see what's wrong. Does anyone have contact with the
: authors (Finland)?
We have HP5071A's that keep to about 5ns over the course of a typical
heading/cooling cycle measured relative to GPS. This is over a range
of maybe 15C in the summer...
Warner
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