[time-nuts] Re: Long term ADEV of 5071

[Bob kb8tq]

Hi

I would *guess* that fountains would be in there somewhere ( at least in the
2021 version ).

Bob

> On Mar 28, 2021, at 9:03 AM, Anders Wallin <anders.e.e.wallin at gmail.com> wrote:
> 
> FWIW here are plots of TAI-weight from the 'w' file for 2021.01. The
> 5071A's are at most 8%. Masers are >87%.
> These sum up to ca 95% - not sure where the missing 5% is..
> Going back to much before 2014 might show larger weight for the 5071As - I
> can post python code for the figures if someone is eager to try...
> 
> AW
> 
> 
> 
> [image: TAI_weight_clockype.png][image: TAI_weight_lab.png]
> 
> On Sat, Mar 27, 2021 at 4:03 PM Demetrios Matsakis via time-nuts <
> time-nuts at lists.febo.com> wrote:
> 
>> I’ve attached an old paper of mine, from PTTI-2000.
>> 
>> I’ve also attached the latest BIPM file of TT.  If you want long-term
>> stability it is best to use that file to compute TT-EAL and TT-TAI and then
>> re-reference the clock data you get from the BIPM.  The BIPM algorithm for
>> EAL/TAI/UTC changed in 2014 so if you stick with TT you re fine.  Since it
>> is computed every 10 days, you might want to spline-interpolate to get the
>> in-between points.  Or just interpolate.
>> 
>>> 
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> <TAI_weight_clockype.png><TAI_weight_lab.png>_______________________________________________
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