Comparisons with IERS C04 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 C04 series for the IVS contribution to ITRF2020. The C04 series privides Earth orientation parameters (EOP):

• Polar motion with respect to the crust X-Pole and Y-Pole,
• Irregularities of the rotation angle UT1-UTC and LOD,
• Celestial pole offsets dX and dY

referred to the precession-nutation model IAU2006.

These values are smoothed at 1-day intervals and published by the IERS Earth Orientation Centre. Since 1^th December 2011, the EOP C04 series is delivered with 30-day latency and includes only final definitive values, cf. IERS message 198. A description of the C04 series can be found at the C04-Guide.

For comparison, the missing X- and Y-Pole Rate of the C04 series are determined by a weighted linear interpolation of the X- and Y-Pole values, respectively.

The comparison is embedded into an interactive tool containing data of the last two year. The user is free to display the graphics of the individual solution, to choose the time-span and to overlay the residuals with their error bars.

The statistic table is updated according to the chosen data set(s). Tool tipping a data point provides a link to the analysis report of the corresponding session.