Use of cookies
Cookies help us to provide our services. By using our website you agree that we can use cookies. Read more about our Privacy Policy and visit the following link: Privacy Policy
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).