Multi-technique Combination of Time Series of Station Positions and Earth Orientation Parameters

CATREF software used to generate ITRF solutions was enhanced in order to rigorously combine station positions (and velocities) together with Earth Orientation Parameters (EOP). As a first test analysis, we present in this paper some results of time series combination of TRF and EOP using data provided by various Analysis Centers contributing to the IERS SINEX Combination Campaign. The main focus of this paper is to examine the EOP consistency, through residual analysis, between the main IERS techniques: VLBI, SLR, GPS and DORIS.