Absolute positioning, tectonic plate motions and polar motion determination with the DORIS system

摘要

DORIS data collected between 1993 and 1996 from the 3 satellites Spot2, Spot3, and Topex/Poseidon have been analysed in order to provide precise positions and velocities of the ground beacons of the DORIS network, and daily values of the polar motion. Recent improvements in the processing have provided solutions at the centimeter level precision for the beacon position, and at the 1-milli-arc-second level for the polar motion parameters. Furthermore, angular velocities and Euler poles of absolute and relative motions between eight major tectonic plates have also been computed from the station velocities determined over the 4-year time span.