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[IGSSTATION-1208]: NPLD Change of frequency source

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IGS Station Mail          25 Oct 08:45:21 PDT 2006      Message Number 1208
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Author: Peter Stacey, NPL

Dear Colleagues,

	The reference frequency source for the station NPLD will change tomorrow (MJD 53034), to another Hydrogen Maser, designated HM2. As the maser will also become the source of
UTC(NPL) at that point, the NPLD station will still provide traceability to UTC(NPL). The offset between the new UTC(NPL) and the 1PPS input to NPLD will hopefully be measured
later this week, and an updated IGS site log provided then.

	As a by-product of the change of frequency source to NPLD, the reference timepoint for it jumped on MJD 54032 by a known amount, which was corrected a couple of hours later.
Please treat yesterday's data with caution.

	Kind Regards,

		Peter


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Peter Stacey
Time, Frequency & The Metre Group
National Physical Laboratory
Teddington
Middlesex
TW11 0LW
U.K.
Tel: +44 20 8943 6311
Fax: +44 20 8943 6529
email: peter.stacey @ npl.co.uk

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