Content-class: urn:content-classes:message Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Subject: [IGSSTATION-1208]: NPLD Change of frequency source Date: Wed, 25 Oct 2006 16:45:17 +0100 Message-ID: <2C2E01334A940D4792B3E115F95B72261AF85D@exchsvr1.npl.ad.local> Thread-Topic: NPLD Change of frequency source Thread-Index: Acb4TJG5sBnNiKM0SraZPzLUKiPapA== From: "Peter Stacey" To: Sender: owner-igsstation Precedence: bulk ****************************************************************************** IGS Station Mail 25 Oct 08:45:21 PDT 2006 Message Number 1208 ****************************************************************************** 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 ------------------------------------------------------------------- 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 ------------------------------------------------------------------- ------------------------------------------------------------------- This e-mail and any attachments may contain confidential and/or privileged material; it is for the intended addressee(s) only. If you are not a named addressee, you must not use, retain or disclose such information. NPL Management Ltd cannot guarantee that the e-mail or any attachments are free from viruses. NPL Management Ltd. Registered in England and Wales. No: 2937881 Registered Office: Serco House, 16 Bartley Wood Business Park, Hook, Hampshire, United Kingdom RG27 9UY -------------------------------------------------------------------