Delivered-To: igsstation@igscb.jpl.nasa.gov Message-ID: <444C9956.1000402@wettzell.ifag.de> Date: Mon, 24 Apr 2006 11:24:38 +0200 From: =?ISO-8859-1?Q?Rudi_St=F6ger?= Reply-To: stoeger@wettzell.ifag.de Organization: BKG-Wettzell User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.2) Gecko/20040804 Netscape/7.2 (ax) Cc: igsstation@igscb.jpl.nasa.gov, eurefmail@oma.be, uwe.hessels@bkg.bund.de, Andreas.Bauch@ptb.de, stoeger@wettzell.ifag.de Subject: [IGSSTATION-923]: PTBB Weak performance of UTC (PTB), caused by CS2 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-igsstation Precedence: bulk ****************************************************************************** IGS Station Mail 24 Apr 02:26:07 PDT 2006 Message Number 923 ****************************************************************************** Author: Rudi Stoeger Ladies and Gentlemen On behalf of Andreas Bauch, PTB Braunschweig I forward this information to you, concerning a weak performance of UTC (PTB), caused by CS 2. With best regards Rudi Here follows the information from Andreas Bauch: Dear colleagues, starting Thursday, 20th, after 20 UTC you may have noticed a weak performance of UTC(PTB), caused by CS2. I tried to do repair on Saturday evening, but finally I made things worse. Since Sunday morning UTC(PTB) is realized with good old CS1 as the physical source. Today we will bring CS2 back to service, however, we have not found the defect component in the electronics. This morning every function was perfectly okay. I am suspicious that the cause of error is the same as that reported in an earlier mail from end January 2006, copied below. It did not show up again in the meantime. With this mail I wish to alert you that PTB data are of limited use on MJD 53845 - 53848. However, the maser data should not be affected by the problem. We try to keep you informed on the progress we make. Sorry for any inconvenience. Best regards Andreas Bauch ____________________________________________________ Dr. Andreas Bauch Physikalisch-Technische Bundesanstalt Fachbereich Zeit und Frequenz, AG 4.42 Time and Frequency Department, AG 4.42 ____________________________________________________ Besuchsadresse / Paketadresse Address for visits / Address for parcel delivery Bundesallee 100 38116 Braunschweig Germany ____________________________________________________ Postanschrift / postal address Postfach 3345 38023 Braunschweig Germany ____________________________________________________ Tel.: +49 531 592 4320 FAX.: +49 531 592 4479 Tel. Sekretariat +49 531 592 4419 ____________________________________________________