Comparisons with IERS Bulletin A EOP Series

On the following pages you will find a comparison between the individual solutions of the analysis centres and the IVS combination with respect to the IERS Bulletin A EOP series for the IVS contribution to ITRF2020. The Bulletin A series provides Earth orientation parameters (EOP):

• Polar motion with respect to the crust X-Pole and Y-Pole,
• Irregularities of the rotation angle UT1-UTC

referred to the precession-nutation model IAU2006.

A description of the IERS Bulletin A series can be found at the IERS central bureau

The original file is regulary updated and can be found at Bulletin A original file.

An explanatory of the file can be found at Bulletin A Product Description.

The comparison is embedded into an interactive tool containing data since 1996. The values are smoothed by a moving median. The subset size of the sliding window is ±35 days and is shifted forward each 7 days. The user is free to display the graphics of the individual solution and to choose the time-spans.

The statistic table is updated according to the chosen data set(s).