[time-nuts] Absolute time accuracy pre-Cesium?

[Bruce Griffiths]

John
http://adsabs.harvard.edu/full/1968JRASC..62..205T
indicates a timing accuracy of a few milliseconds was typical for the Calgary PZT.

Bruce
> On 26 March 2019 at 11:44 John Ackermann N8UR <jra at febo.com> wrote:
> 
> 
> Does anyone have a pointer to information about the absolute time 
> accuracy (not stability) that was available via PZT or other techniques 
> prior to the Cesium definition?  I'm doing a presentation and want to 
> show the evolution of accuracy.  My Google-fu has failed me in finding 
> anything pre-Atomic.
> 
> Thanks!
> John
> 
> 
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