Product: EOP 14 C04 (IAU1980, dPsi, dEps) 0hUTC - one file (1962-now)
EOP 14 C04 series for 1962-2025 - Version metadata

Available downloads

Content

Earth orientation parameters: x/y pole, UT1-UTC, LOD, dPsi, dEps (smoothed values at 1-day intervals) with respect to IAU 1980 precession-nutation model and consistent with ITRF2014.

EOP 14 C04 is updated two times per week.
Format

ASCII
Format Description

3(I4),I7,2(F11.6),2(F12.7),2(F11.6),2(F11.6),2(F11.7),2(F12.6)
Documentation

General information: ftp://hpiers.obspm.fr/iers/eop/eopc04/C04.guide.pdf
Information on updates: http://hpiers.obspm.fr/iers/eop/eopc04/updateC04.txt
Publications:
Bizouard, C., Lambert, S., Gattano, C. et al. (2019) The IERS EOP 14C04 solution for Earth orientation parameters consistent with ITRF 2014.
J Geod 93(5):621-633,
https://doi.org/10.1007/s00190-018-1186-3
Title

EOP 14 C04 series for 1962-2025
Data

Date [yyyy mm dd], MJD, x ["], y ["], UT1-UTC [s], LOD [s], dPsi ["], dEps ["], x Err ["], y Err ["], UT1-UTC Err [s], LOD Err [s], dPsi Err ["], dEps Err ["]
Data Points

23089
Time Start

1962-01-01
Time End

2025-03-19
Time Interval

1 day
Accuracy 
-                       Min          Max      Average      Average (last 365 days)
sigma_X ["]         0.000021     0.030000     0.006208     0.000032
sigma_Y ["]         0.000016     0.030000     0.006198     0.000024
sigma_UT1-UTC [s]  0.0000011    0.0020000    0.0005589    0.0000081
sigma_LOD [s]      0.0000026    0.0014000    0.0003067    0.0000082
sigma_dPsi ["]      0.000040     0.012000     0.002671     0.000359
sigma_dEps ["]      0.000007     0.002000     0.000749     0.000150
Keywords

EOP, Long term series, 14 C04, IAU1980
Frequency

bi-weekly
Source

ftp://hpiers.obspm.fr/iers/eop/eopc04/
Created by

IERS Earth Orientation Centre
Published by

IERS Earth Orientation Centre
Date

2025-04-18
Contact

services.iers@obspm.fr
Distribution

onLine