Comparison of EOP series

Comparison of EOP series.

I made comparison of UT1 series gsf2000a.eops derived in Goddard from the 24 hours VLBI sessions, gsfint01.eopi derived in Goddard from short NEOS Intensive series with the file finals.data derived in USNO by combination of ... somewhat. Before comparison a linear regression was subtracted from the finals.data by such a manner that no linear trend remained in the differences gsf2000a.eops minus finals.data over the period 1992.00 -- 2000.86

For comparison I interpolated finals.data by cubic spline.

here green points are the differences of UT1 gsf2000a.eops minus finals.data, blue points are the differences of UT1 gsfcint01.eopi minus finals.data .
this plot zooms a small part of the previous plot.

I also compared our UT1 series with the series last.eopk obtained by the Goddard EOP Kalman filter. Only results from the 24 hours experiments were used as the input for the filter.

here green points are the differences of UT1 gsf2000a.eops minus last.eopk blue points are the differences of UT1 gsfcint01.eopi minus last.eopk .
this plot zooms a small part of the previous plot.

Finally I compared our UT1 series with the series all_last.eopk obtained by the Goddard EOP Kalman filter. All results, from the 24 hours experiments and from the Intensives, were used as the input for the filter.

here green points are the differences of UT1 gsf2000a.eops minus all_last.eopk blue points are the differences of UT1 gsfcint01.eopi minus all_last.eopk .
this plot zooms a small part of the previous plot.

This plot present the differences between gsf2000a.eops, gsfint01.eopi and ORIGINAL finals.data without additional transformation.
The same plots as above but without error bars gsf2000a.eops, gsfint01.eopi and ORIGINAL finals.data

Raw tables:

The differences UT1 gsf200a.eops from 24 hours VLBI experiment minus finals.data . The first column is time in years, the second differneces in seconds, the third is the formal uncertainty of the VLBI estiamte of UT1.

The differences UT1 gsfint01.eops from NEOS Intensive VLBI experiment minus finals.data . The first column is time in years, the second differneces in seconds, the third is the formal uncertainty of the VLBI estiamte of UT1.

usno finals.data file used for comparison.

The differences UT1 gsf200a.eops from 24 hours VLBI experiment minus ORIGINAL finals.data . The first column is time in years, the second differneces in seconds, the third is the formal uncertainty of the VLBI estiamte of UT1.

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Last update: 04-DEC-2000 11:05:11