[time-nuts] Fw: Rb Oscillator - rather fundamental question
warrensjmail-one at yahoo.com
Tue Feb 23 21:04:10 UTC 2010
One more try, As often happens when I rant, the rant is discarded in the
Thanks, Interesting but maybe you have missed my too subtle of a point.
Lets say the second is redefined in the future to some new super duper thing
that is good to 1 part in e20
(Which will happen if (when) the super duper thing becomes more available
(Maybe based on the time it takes to count all the atoms in the new purposed
1 Kg sphere OR something like that.)
Then the CS Osc would not be the BEST primary standard anymore, at least NOT
at the new improved spec it could then be given.
Not because it has changed or is less accurate, but because there is now
If it is not the primary standard, it does not make it worse, but it does
mean it will now be a second standard at the new higher performance spec, by
definition and need to be then calibrated and checked against the new
primary standard IF one wanted to use it to it's maximum capability as a
cost effective substitute for the supper duper.
Same with RB, One can not do something to it to make it more than say 1
part in e6 (or whatever) that the cave man needed, so it could of been their
Primary repeatable Intrinsic standard that was repeatable Good Enough
without cal for them.
>" Primary means that the clock will meet its spec without being
>"calibrated" against a better clock".
More information about the time-nuts