Delivered-To: igsmail@igscb.jpl.nasa.gov From: Jim Ray "(NGS" 301-713-2850 "x112)" Message-Id: <200506161809.OAA11273@ness.ngs.noaa.gov> Subject: [IGSMAIL-5161]: OPMT RINEX file corrupted for DOY 167 To: igsmail@igscb.jpl.nasa.gov Date: Thu, 16 Jun 2005 14:09:44 -0400 (EDT) Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-igsmail Precedence: bulk ****************************************************************************** IGS Electronic Mail 16 Jun 11:06:54 PDT 2005 Message Number 5161 ****************************************************************************** Author: Pierre Uhrich (forward by J. Ray) Dear Colleague, Observatoire de Paris (France) sufferred an electrical power failure shortly after 00:00 UTC on DOY 167 (MJD 53537, June 16). One of the unexpected consequences was the failure of both H-Masers of the laboratory, hence the one connected to our IGS station OPMT. This resulted in a loss of frequency reference for the Ashtech Z12-T receiver during a few hours. Moreover, the H-Maser restart this morning means a period of time which can reach a few days before the frequency of the H-Maser stabilizes again. For many different reasons, it was decided today not to change the H-Maser source of the OPMT receiver. We will await the choice made by our Colleagues in charge of the Primary Frequency Standards among the H-Masers currently available to plan a change if necessary. This message is intended to warn potential users that the RINEX file for DOY 167, which will be computed automatically tonight and released tomorrow morning (June 17), will be corrupted. This will also be the case for the future GPS P3 data transmitted to the BIPM. Please feel free to forward this message to any Colleague you might feel interested. Best regards. P. Uhrich. -- =============================================================== Dr Pierre Uhrich Pierre.Uhrich@obspm.fr Ingenieur LNE Equipe Metrologie du temps LNE-OP/SYRTE, Phone: + 33 (0)1 40 51 22 17 UMR CNRS 8630, Fax: + 33 (0)1 43 25 55 42 Observatoire de Paris, 61 avenue de l'Observatoire, F-75014 Paris, France. ===============================================================