EOP 14 C04 series for 2021 (IAU2000)

Earth orientation parameters: x/y pole, UT1-UTC, LOD, dX, dY (smoothed values at 1-day intervals) with respect to IAU 2006/2000A precession-nutation model and consistent with ITRF2014.

EOP 14 C04 is updated two times per week.

Relative to 08 C04, changes in the EOP series from 2011 consist of

1) A small bias in x-pole and y-pole under -50 +/- 25 microarcseconds in the sense of x or y (14 C04) - x or y (08 C04);

2) Small changes in UT1-TAI that are under 5 microseconds; and

3) Small changes in celestial pole offsets that are under 20 microarcseconds.

The data are stored in yearly files since 1962 and in one file 1962-now.

ASCII

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

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

EOP 14 C04 series for 2021 (IAU2000)

Date [yyyy mm dd], MJD, x ["], y ["], UT1-UTC [s], LOD [s], dX ["], dY ["], x Err ["], y Err ["], UT1-UTC Err [s], LOD Err [s], dX Err ["], dY Err ["]

365

2021-01-01

2021-12-31

1 day

-                       Min          Max      Average
sigma_X ["]         0.000021     0.000075     0.000027
sigma_Y ["]         0.000016     0.000074     0.000020
sigma_UT1-UTC [s]  0.0000065    0.0000161    0.0000109
sigma_LOD [s]      0.0000061    0.0000078    0.0000068
sigma_dX ["]        0.000032     0.000110     0.000058
sigma_dY ["]        0.000018     0.000164     0.000058
						

EOP, Long term series, 14 C04, IAU 2006/2000A

bi-weekly

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

IERS Earth Orientation Centre

IERS Earth Orientation Centre

2022-03-31

services.iers@obspm.fr

onLine