[time-nuts] Precise Time transfer and relative position over a short baseline

[Vlad]

If all independent clocks is stable enough, then correlation between of 
them could be re-considered after the data will be collected, I think.


On 2016-04-11 01:00, Bruce Griffiths wrote:
> There is a proposal to use multiple light bucket style optical
> telescopes to do Intensity stellar Interferometry over short baselines
> (up to perhaps 1km  or so) by using independent clocks to time tag
> photon  arrivals. store the time tags and process the data off line.
> Depending on the time tag resolution there is a need to measure the
> time differences between the independent clocks to an accuracy in the
> 1ns to 100ps range. Is there a better way of doing this other than
> using geodetic grade GPS receivers capable of GPS carrier phase
> measurements?Since the local clock flywheel oscillators will need to
> not deviate by more than 100ps or so over the several minutes required
> to perform the carrier phase averaging what sort of clock will be
> suitable apart from a good rubidium standard with a cleanup
> oscillator?
> NB Running fibres or coax between the telescopes isnt an option.
> 
> The relative positions of the telescopes has to be known to within a
> cm or so for this to work.
> Bruce
> 
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-- 
WBW,

V.P.