# IVS Combination

On the following pages you will find a comparison between the individual solutions of the analysis centres with respect to the IVS combination. 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 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.