Product: EOP 20u24 C04 (IAU2000A, dX, dY) 12hUTC - one file (1984-now)
EOP 20u24 C04 series for 1984 - now / 12hUTC / dX, dY / IAU2000A - Version metadata

Combined Earth orientation parameter solution consistent with the International Terrestrial Reference Frame (ITRF) 2020-u2024

Features:

1) Contain daily values of 8 Earth orientation parameters with their formal errors:

- Pole coordinates x, y (")
- UT1 - UTC (s)
- Celestial pole offsets dX, dY (")
- Pole coordinate rates xrt, yrt ("/day)
- Length of day offset LOD (s)

2) Download from https://hpiers.obspm.fr/iers/eop/eopc04/

version: eopc04.12h.1984-now: sampled values at 12hUT / dX, dY IAU 2006/2000A

ASCII

4(i4),f10.2,2(f12.6),f12.7,2(f12.6),2(f12.6),f12.7,2(f12.6),f12.7,2(f12.6),2(f12.6),f12.7

General information: https://hpiers.obspm.fr/iers/eop/eopc04/readme
Information on updates: https://hpiers.obspm.fr/iers/eop/eopc04/updateC04.txt

EOP 20u24 C04 series for 1984 - now / 12hUTC / dX, dY / IAU2000A

YR, MM, DD, HH, MJD, x("), y("), UT1-UTC(s), dX("), dY("), xrt("), yrt("), LOD(s), x Er, y Er, UT1-UTC Er, dX Er, dY Er, xrt Er, yrt Er, LOD Er

15349

1984-01-01

2026-01-07

1 day

-                       Min          Max      Average      Average (last 365 days)
sigma_X ["]         0.000031     0.021002     0.000249     0.000048
sigma_Y ["]         0.000029     0.008093     0.000211     0.000047
sigma_x_rate ["]    0.000053     0.015619     0.000304     0.000102
sigma_y_rate ["]    0.000055     0.006508     0.000304     0.000106
sigma_UT1-UTC [s]  0.0000000    0.0048655    0.0000281    0.0000352
sigma_LOD [s]      0.0000000    0.0013733    0.0000458    0.0000149
sigma_dX ["]        0.000000     0.015446     0.000182     0.000481
sigma_dY ["]        0.000000     0.014691     0.000183     0.000465
						

EOP, Long term series, 20u24 C04, IAU 2006/2000A

daily

https://hpiers.obspm.fr/iers/eop/eopc04/

IERS Earth Orientation Centre

IERS Earth Orientation Centre

2026-02-06

services.iers@obspm.fr

onLine