Ukrainian  Centre  of  determination  of   the   Earth  Orientation  Parameters

Main  astronomical  observatory   of  the  National  academy   of  sciences  of  Ukraine
STRUCTURE
service
ANALysis CENTREs
GPS NETWORK
SLR NETWORK
VLBI NETWORK
Location
HISTORY
NEWS
BOOKS
LINKS
ADDRESS

International Terrestrial Reference System
(from ITRF web page)