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Discussion of precise time and frequency measurement

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Re: [time-nuts] How good is the left end of your ADEV curve?

HM
Hal Murray
Thu, Jan 26, 2017 7:38 AM

….. errr … would not that be the right end of the ADEV curve? …..:)

Argh.  Thanks for the correction.

I got time and frequency swapped in my head, probably because I was thinking
of the noise vs frequency plots that he showed.

Back in the 1980’s these guys were after sub 1x10^-15 bumps over path
distances like Earth to Jupiter. Not sure what they are after these days.

If it's anything like how hard they had to work for LIGO it will be way way way out there.  High on the current list of noise sources that LIGO is working on is thermal noise from the optical coatings.

--
These are my opinions.  I hate spam.

kb8tq@n1k.org said: > ….. errr … would not that be the *right* end of the ADEV curve? …..:) Argh. Thanks for the correction. I got time and frequency swapped in my head, probably because I was thinking of the noise vs frequency plots that he showed. > Back in the 1980’s these guys were after sub 1x10^-15 bumps over path > distances like Earth to Jupiter. Not sure what they are after these days. If it's anything like how hard they had to work for LIGO it will be way way way out there. High on the current list of noise sources that LIGO is working on is thermal noise from the optical coatings. -- These are my opinions. I hate spam.