Content-class: urn:content-classes:message Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Subject: [IGSSTATION-1815]: NPLD: Minor change in hardware Date: Wed, 26 Sep 2007 12:19:10 +0100 Message-ID: <2C2E01334A940D4792B3E115F95B72260144EB87@exchsvr1.npl.ad.local> Thread-Topic: NPLD: Minor change in hardware Thread-Index: AcgALxB1UoFhvtcjRuyk2YkBTQ2GUg== From: "Peter Stacey" To: Sender: owner-igsstation Precedence: bulk ****************************************************************************** IGS Station Mail 26 Sep 04:19:16 PDT 2007 Message Number 1815 ****************************************************************************** Author: Peter Stacey Dear IGS colleagues, We are in the process of installing a 20MHz filter on the frequency input to NPLD, since the signal looked quite distorted. Hopefully this will make the NPLD clock offset values more stable. As a result, NPLD will be missing some data over the next day or so, but should still produce daily files. For those using NPLD to obtain traceability back to UTC(NPL), this means that the Ref Delay will change slightly. I am hoping to quantify this change and include it in our CGGTTS data from today onwards. Kind Regards, Peter ------------------------------------------------------------------- Peter Stacey Time and Frequency 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 -------------------------------------------------------------------