EOP C04_08 series for 1962-2018 (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 ITRF2008.

EOP 08 C04 has been updated two times per week until 2018-04-26.

Compared to the old version EOP 05 C04, the series EOP 08 C04 differs by the following characteristics:
1) A negligible bias in x-pole and a bias of about -50 +/- 25 microarcseconds in y-pole in the sense of y (08C04) - y (05C04);

2) Changes in UT1-TAI and celestial pole offsets are respectively on the order of 2 microseconds, 1, and 17 microarcseconds which are at the level of the WRMS between IVS individual solutions.

ASCII

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

ftp://hpiers.obspm.fr/iers/eop/eopc04_08/C04.guide.pdf

EOP 08 C04 series for 1962-2018 (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 ["]

20540

1962-01-01

2018-03-27

1 day

- Min Max Average Average (last 365 days)
sigma_X ["] 0.000003 0.030000 0.007488 0.000004
sigma_Y ["] 0.000004 0.030000 0.007527 0.000004
sigma_UT1-UTC [s] 0.0000001 0.0020000 0.0006268 0.0000204
sigma_LOD [s] 0.0000006 0.0014000 0.0003459 0.0000031
sigma_dX ["] 0.000000 0.004774 0.001209 0.000043
sigma_dY ["] 0.000002 0.005151 0.000868 0.000044

EOP, Long term series, 08 C04, IAU 2006/2000A

bi-weekly

ftp://hpiers.obspm.fr/iers/eop/eopc04_08/eopc04_IAU2000.62-now

IERS Earth Orientation Centre

IERS Earth Orientation Centre

2018-04-26

services.iers@obspm.fr

onLine