Product: EOP 14 C04 (IAU1980, dPsi, dEps) 0hUTC - yearly files
EOP 14 C04 series for 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 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

42
Time Start

2025-01-01
Time End

2025-02-11
Time Interval

1 day
Accuracy 
-                       Min          Max      Average
sigma_X ["]         0.000031     0.000037     0.000035
sigma_Y ["]         0.000022     0.000024     0.000023
sigma_UT1-UTC [s]  0.0000039    0.0000055    0.0000044
sigma_LOD [s]      0.0000061    0.0000090    0.0000081
sigma_dPsi ["]      0.000309     0.000425     0.000388
sigma_dEps ["]      0.000126     0.000183     0.000149
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

2025-03-13
Contact

services.iers@obspm.fr
Distribution

onLine