@unpublished{TUW-120344, author = {Opitz, Michael and Weber, Robert and Caissy, M.}, title = {Real Time Integrity Monitoring of the IGU Satellite Orbits by Means of the RTIGS Network}, year = {2006}, note = {poster presentation: EGU 2006, Wien; 2006-04-02 -- 2006-04-07} }