[time-nuts] Fw: Rb Oscillator - rather fundamental question

WarrenS 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 
and proven)
(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 
something better.
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".

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