[time-nuts] Optical transfer of time and frequency

[Ilia Platone]

There is line of sight.

The budget is around 2k€ by now, but can be increased.

This project is for an amateur astro club, and the resources they would 
give to me are limited, except the place where to do this and some optics.

The setup must be mobile, I mean that I should be able to place the 
telescopes in other places "easily".

There is some material however. Material includes FPGA boards, VOCXO + 
PLL boards, IR lasers and APD sensor boards, ARM boards, and consumer PCs.

There is also the possibility to use some optics like small reflector 
telescopes, as pointed before, they could be used as beam expanders for 
IR lasers.

Ilia.


Il 29/04/2016 09:36, Michael Wouters ha scritto:
> On Fri, Apr 29, 2016 at 1:18 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.
> Oh, yes I see in Fig 2b that the short term, one-way noise is ca. +/-
> 5 ps. And probably with temperature measurements, the long term
> variation could be compensated.
>
> But we still don't know if there is line of sight.
>
> Cheers
> Michael
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-- 
Ilia Platone
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Cattolica (RN), Italy
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