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    Re: Radio Clock or Internet GMT - which should I believe?
    From: Jaap vd Heide
    Date: 2012 Mar 4, 07:47 -0800

    Oh, and the UK National Physical Laboratory (NPL) does not only run their own atomic clocks, but also two NTP time servers: ntp1.npl.co.uk and (not very surprising) ntp2.npl.co.uk .
    According to their website their NTP service's accuracy is about 20 ms.

    Jaap
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