Delivered-To: igsmail@igscb.jpl.nasa.gov Date: Thu, 20 Oct 2005 12:43:38 +0200 From: Stefan Schaer Subject: [IGSMAIL-5234]: GLONASS anomaly To: igsmail Message-id: <435774DA.6030907@aiub.unibe.ch> Organization: Astronomical Institute, University of Berne Content-type: text/plain; charset=us-ascii; format=flowed Content-transfer-encoding: 7bit User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax) Sender: owner-igsmail Precedence: bulk ****************************************************************************** IGS Electronic Mail 20 Oct 03:43:45 PDT 2005 Message Number 5234 ****************************************************************************** Author: Stefan Schaer NOTIFICATION: We just observed that a number of AIV GNSS receivers changed GLONASS satellite identifier from R21 to R19 at epoch 2005-10-19 22:57:30. http://www.aiub.unibe.ch/download/igsdata/y2005/odata_glonass_d292.txt http://www.aiub.unibe.ch/download/igsdata/y2005/odata_glonass_d293.txt It isn't yet clear to us whether this is - a receiver-specific problem, - a GLONASS system anomaly, or - an intended (but unannounced) GLONASS system change. At CODE, we started to rename possible R19 observations to R21 observations. The CODE AC Team