IVS Combination for ITRF2020

On the following pages you will find a comparison between the individual solutions of the analysis centres with respect to the IVS combination for the input contribution to ITRF2020. The IVS combination contains the full set of Earth orientation parameters (EOP):

• X-Pole,
• Y-Pole,
• UT1-UTC,
• X-Pole Rate,
• Y-Pole Rate,
• LOD,
• dX and
• dY

with respect to IAU 2006/2000A precession-nutation model.

The IVS combination is basically a weighted accumulating of the datum-free normal equation matrices of the analysis centers.

The comparison is embedded into an interactive tool containing data since 1983. 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).