[time-nuts] Optical transfer of time and frequency

[Bob Stewart]

I apologize for not following the original thread closely, but has anyone mentioned The White Rabbit Project?  Here's a wiki link.  Links from there to CERN, etc.  It might be beyond budget, etc.

en.wikipedia.org/wiki/The_White_Rabbit_Project

Bob
--------------------------------------------
On Thu, 4/28/16, Bruce Griffiths <bruce.griffiths at xtra.co.nz> wrote:

 Subject: [time-nuts] Optical transfer of time and frequency
 To: "Discussion of Precise Time and Frequency Measurement" <time-nuts at febo.com>
 Date: Thursday, April 28, 2016, 10:18 PM
 
 Quoting Michael Wouters: "According
 to this,
 
 http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912449
 
 there are many practical challenges  with a one way
 free-space optical link."
 That paper indicates that  one way transfer with noise of a
 few picosec should be feasible using an IR laser. Especially
 if only required at night for synchronisation of the
 timebases of the various telescope/detectors in a stellar
 intensity interferometer.
 Atmospheric scintillation should be lower as well as
 background noise from the sky, sun etc. The other factors
 like rain, hail, snow, fog etc aren't an issue  as these
 preclude observation of the stars of interest.
 Bruce
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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