[time-nuts] Optical transfer of time and frequency

Azelio Boriani azelio.boriani at gmail.com
Fri Apr 29 03:52:43 EDT 2016


Yes, but I see that the allan deviation figures they cite aren't
achievable with common time-nuts gear now. Considering a VLBI project:
first premium stability then superb time transfer.

On Fri, Apr 29, 2016 at 5:18 AM, Bruce Griffiths
<bruce.griffiths at xtra.co.nz> wrote:
> Quoting Michael Wouters: "According to this,
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> http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912449
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> 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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