On Sun, 27 Mar 2016 10:50:13 -0400
paul swed <[email protected]> wrote:
> I do not have it but I stumbled into it on the internet. There was one
> paper it was military, naval observatory or NIST and it did indeed show
> failure rates of cesiums of the reference that were owned and it must have
> been 30-50 of them.
> I remember it showed failures of units over years.
> Since it did not at all addres my need I did not keep it.
Do you remember anything more about the paper? I couldn't find anything.
The only remark i found, is a small sentence in an introduction
of an paper[1]:
---
The USNO has 60 high performance cesium frequency standards (clocks).
These clocks are combined to form a timescale or mean that serves as the
long-term frequency reference for USNO. At any given time, approximately 75%
of these clocks are weighted in that mean, the remainder unweighted due
to hardware failures or behavior deemed uncharacteristic for that clock.
---
But no details...
[1] "Analysis Of Clock Modeling Techniques For Usno Cesium Mean",
by Skinner, Koppang, 2007
http://www.dtic.mil/get-tr-doc/pdf?AD=ADA474175
--
Reading can seriously damage your ignorance.
-- unknown
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