Abstract
The DORIS system developed for precise orbitography and precise positioning has been operational since the launch of the SPOT‐2 satellite in January 1990. Doppler DORIS data have been currently analysed since the beginning of the mission for geodetic objectives. Absolute positioning results based on a semi‐dynamical orbital analysis approach have been derived with the 2 years of DORIS data available. Cartesian coordinates of the global DORIS network (43 beacons) derived on a monthly basis show a month‐to‐month repeatability of 5–7 cm rms. Comparison between DORIS station coordinates and those determined by VLBI or SLR collocated with DORIS beacons indicates an accuracy of 5–7 cm rms in the 3 coordinates. Earth pole positions are determined at 5‐day intervals with a standard deviation of 1–2 mas. The comparison of the pole positions estimated from the DORIS data with a homogeneous series provided by the International Earth Rotation Service shows differences with an amplitude of a few mas.
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