Date: Thu, 17 Dec 2009 11:17:08 -0500 From: jim.ray@noaa.gov Subject: [IGSMAIL-6039]: late delivery of IGUs 1562_4_00 & 1562_4_06 To: "igsmail@igscb.jpl.nasa.gov" Message-id: Content-type: text/plain; charset=us-ascii Content-language: en Content-transfer-encoding: 7bit Priority: normal Sender: owner-igsmail Precedence: bulk ****************************************************************************** IGS Electronic Mail 17 Dec 08:17:30 PST 2009 Message Number 6039 ****************************************************************************** Author: Analysis Center Coordinator Due to an unscheduled, site-wide network outage overnight in the U.S., the IGS Ultra-rapid combinations for 1562_4_00 and 1562_4_06 were generated and delivered to the Data Centers later than usual. We apologize to users for any inconvenience. But it is important to stress that the current IGU orbit predictions have such high quality that the prediction accuracy over the full 24 hr provided in each update degrades by only about a factor of two compared to the predictions for the first 6 hr. So we expect that the delay of these two IGU updates should have minimal impact on user application performance. If this is not the case for some users, it would be useful to receive further information. http://acc.igs.org/