[time-nuts] Optical transfer of time and frequency

Bruce Griffiths bruce.griffiths at xtra.co.nz
Fri Apr 29 00:25:10 EDT 2016


There's more relevant data on optical free space time and frequency transfer here:http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915083


Bruce



    On Friday, 29 April 2016 4:01 PM, Bruce Griffiths <bruce.griffiths at xtra..co.nz> wrote:
 

 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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