IERS SINEX combination campaign

This position paper briefly summarizes the present status and still existing deficiencies regarding the combination of space geodetic techniques concentrating thereby on a rigorous and consistent combination of ITRF, EOP (and ICRF). Further subjects include the intention, goal and setup of the IERS SINEX combination campaign, as well as a list of participants, a summary of the data pool and of the individual solution characteristics. Finally, we propose some future steps in view of the goals of the SINEX combination campaign.