Subject: [SLR-Mail] No.2158: ITRF2013 Call for Participation From: Zuheir Altamimi ******************************************************************************** SLR Electronic Mail 2013-03-27 14:35:28 UTC Message No. 2158 ******************************************************************************** Dear Colleagues, Please be informed that the ITRF2013 Call for Participation is now released and could be retrieved at the ITRF web site, using the following link: http://itrf.ign.fr/ITRF_solutions/2013/CFP-ITRF2013-27-03-2013.pdf In addition to the solicited global solutions from the four space geodesy techniques (to be provided by the Technique Services), we also solicit and encourage the owners of co-location sites to consider conducting new local tie surveys using the most up to date survey methods. Indeed, the local ties available at the ITRS Center for a certain number of co-location sites are now old by 10 to 20 years. In this respect, we would greatly appreciate the contribution of the national mapping and space agencies investing and operating co-location sites, which constitute the main foundation of the ITRF. More details regarding the local tie survey are available in the ITRF2013 CfP. Cordially Zuheir Altamimi ------------------------------------------------------------------- Zuheir Altamimi Head, IERS ITRS Center Institut National de l´Information Géographique et Forestière (IGN) Université Paris Diderot UFR STEP / IPGP / LAREG Bâtiment Lamarck A 35 rue Hélène Brion Case 7071 75205 Paris Cedex 13 Tel +33 (0) 1 57 27 53 28 email: zuheir.altamimi@ign.fr ------------------------------------------------------------------- ********************************************************************************