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

Available downloads

Content

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

Features:

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

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

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

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

Format

ASCII
Format Description

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
Documentation

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

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

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
Data Points

14905
Time Start

1984-01-01
Time End

2024-10-21
Time Interval

1 day
Accuracy 
-                       Min          Max      Average      Average (last 365 days)
sigma_X ["]         0.000028     0.021002     0.000253     0.000052
sigma_Y ["]         0.000026     0.008093     0.000214     0.000044
sigma_x_rate ["]    0.000049     0.015619     0.000288     0.000059
sigma_y_rate ["]    0.000053     0.006508     0.000285     0.000066
sigma_UT1-UTC [s]  0.0000030    0.0048655    0.0000279    0.0000201
sigma_LOD [s]      0.0000125    0.0013733    0.0000466    0.0000236
sigma_dX ["]        0.000027     0.009683     0.000175     0.000114
sigma_dY ["]        0.000024     0.006362     0.000175     0.000100
Keywords

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

daily
Source

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

IERS Earth Orientation Centre
Published by

IERS Earth Orientation Centre
Date

2024-11-20
Contact

services.iers@obspm.fr
Distribution

onLine