****************************************************************************** dorismail 20-Dec-2006 15:13:37 Message No 0475 ****************************************************************************** Author: Jim Ray "(NGS" 301-713-2850 "x112)" Subject: ITRF session at EGU07 Author: Zuheir Altamimi & Jim Ray EGU 4th General Assembly -- Vienna, Austria, 15-20 April 2007 http://meetings.copernicus.org/egu2007/ Dear Colleagues, The 4th General Assembly of the European Geosciences Union will be held in Vienna, Austria, 15-20 April 2007. We draw your attention in particular to session "G1 - The impact of technique errors on reference frame accuracy and stability": The advance of the International Terrestrial Reference Frame (ITRF) has reached such a level of maturity that further improvements will require new insights into the systematic errors affecting all of the contributing observational techniques and the local ties that relate them. Random thermal measurement noise is generally not a significant error source any longer, but continued improvement in the sensitivity of the observing systems is nonetheless desirable as a means to better expose non-random effects. This session seeks contributions to identify the important systematic errors currently affecting ITRF realizations and to clarify the extent that those effects contaminate geodetic and geophysical results. Experiences with the ITRF2005 realization, such as possible explanations for the apparent difference in VLBI and SLR scales, are particularly relevant. Proposals for future improvements, new approaches, or novel measurement types are especially sought. Important Dates: 15 January 2007: Deadline for receipt of abstracts at http://www.cosis.net/members/meetings/programme/overview_db.php?m_id=40 31 March 2007: Deadline for pre-registration & hotel booking Please consider submitting a paper for this symposium or contact us directly if you have any questions. Sincerely, Jim Ray, jimr@ngs.noaa.gov Geosciences Research Division, National Geodetic Survey Zuheir Altamimi, altamimi@ensg.ign.fr ENSG/LAREG, Institut Geographique National Cliquez sur l'url suivante https://www.mailcontrol.com/sr/nsQeK+rPtqWXRGSIgvEdEpSbUREMIK+gpmgzs5ll9jt0tA+GRa1adW8Gdc2BtUrJjfw5TwmXCCoGbJVayE7K1MGliT8zh9r9BUpQFtfJ7qmupiRW3zyyvMO!0K3FPXqLIV5eZw7AxN4IGTWmRzzovhPAFEBPuEfpNMzTqmPH5e9xH8wInZhAZoXzb5iGXxWzEG32LPkRNvMf7WZOKaMb2UanXRv6uSnZ si ce message est ind?sirable (pourriel). Please do not reply directly to this message, but send comments and suggestions to IDS.central.bureau@cls.fr