ITRF2013 Call for Participation
03/28/2013 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 fourspace geodesy techniques (to be provided by the TechniqueServices), we also solicit and encourage the owners ofco-location sites to consider conducting new local tie surveysusing the most up to date survey methods. Indeed, the localties available at the ITRS Center for a certain number ofco-location sites are now old by 10 to 20 years. In thisrespect, we would greatly appreciate the contribution of thenational mapping and space agencies investing and operatingco-location sites, which constitute the main foundation of theITRF. More details regarding the local tie survey are availablein the ITRF2013 CfP.