[time-nuts] GPSDO control system

Tom Van Baak (lab) tvb at leapsecond.com
Sun Mar 23 20:58:25 EDT 2014


Rule of thumb:
- really good OCXO have frequency drift rates of 1e-10 to 1e-11/day
- common Rb have frequency drift rates on the order of 1e-11/month
- Cs do not have frequency drift
- H-maser drift rates are 1e-15 to 1e-16/day

/tvb (i5s)

> On Mar 23, 2014, at 4:32 PM, Charles Steinmetz <csteinmetz at yandex.com> wrote:
> 
> Hal wrote:
> 
>> Does anybody have data on the drift of Rs or Cs?
> 
> Tom has some data posted at leapsecond.com (for H-masers, too).
> 
> John Miles has some at ke5fx.com.
> 
> John Ackermann has some at febo.com.
> 
> I encourage you to roam widely over all three sites -- you will be well rewarded.
> 
> Best regards,
> 
> Charles
> 
> 
> 
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