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International Earth Rotation and Reference Systems Service

What new products were provided by IERS after 1 January 2003?

The IERS began to publish new time series in Bulletin A and Bulletin B that list observed corrections to the direction of the Celestial Intermediate Pole (CIP) provided by the IAU 2000 A precession/nutation theory. These corrections are given for both the classical representation (dpsi and deps) and for the new representation recommended by the IAU (dX and dY).