Product: EOP C01 IAU2000 (1846-now)
EOP C01 series of the Earth orientation parameters (1846-2025) IAU 2000 - Version metadata

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Content

EOP(IERS) C 01 is a series of the Earth Orientation Parameters given in the 1997 IERS system at 0.1 year interval (1846 - 1889) and 0.05 year interval (1890 - now).
It is regularly recomputed to take advantage on one hand of the improvement of the various individual contributions and in the other hand of the refinement of the analyses procedures. This series is the basis of the IERS system.
Format

ASCII
Format Description

https://hpiers.obspm.fr/eoppc/eop/eopc01/format.eop
Documentation

http://hpiers.obspm.fr/eoppc/eop/eopc01/EOPC01.GUIDE
Title

EOP C01 series of the Earth orientation parameters (1846-2025) IAU 2000
Data

MJD, PM-X["], PM-Y["], UT1-TAI[s], DX["], DY["], X-ERR["], Y-ERR["], UT1-ERR[s], DX-ERR["], DY-ERR["], LOD[s/d], LOD-ERR[s/d]
Data Points

3145
Time Start

1846-01-01
Time End

2025-03-14
Time Interval

0.1 years [1846-1889]
0.05 years [1890-now]
Accuracy 
-             min        max
sx         -0.025228     0.000417
sy         0.000015     0.157870
sut1       0.0000000    0.1643200
sdx        0.000003     99.990000
sdy        0.000000     0.002746
Keywords

EOP, Long term series, C01, 1846-2025
Frequency

irregular
Source

http://hpiers.obspm.fr/eoppc/eop/eopc01/eopc01.iau2000.1846-now
Created by

IERS Earth Orientation Centre
Published by

IERS Earth Orientation Centre
Reference

Vondrak J., Ron C., Pesek I., Cepek A., 1995, Astron. and Astrophys. 297, 899-906.
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IERS Annual reports

Date

2025-04-01
Contact

services.iers@obspm.fr
Distribution

onLine