[time-nuts] GSP clock stabilitiy, Rb vs Cs

Mike S mikes at flatsurface.com
Sun May 5 20:29:08 EDT 2013

On 5/4/2013 2:40 PM, Attila Kinali wrote:
> Can anyone shed some light on why the GPS Cs beams have a worse stability
> than the Rb vapor clocks?

I don't know, but it makes me wonder about things like

1) How sensitive is each to C-field tuning - i.e. for the same change in 
C-field, by how much does each type change in relative frequency? (or 
maybe it's exactly the same, I know nothing about the Zeeman effect) I'd 
think there would be orbital changes in frequency, after all, it's 
orbiting a big magnet.

2) How tight a lock can be obtained on each? i.e. might the physical 
realizations of Rb clocks have a higher Q-factor?

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