EOP 20 C04 series for 1962-2023
Available downloads
Content | Combined Earth Rotation Parameter solution consistent with the International Terrestrial Reference Frame (ITRF) 2020 Features: 1) Contain daily values of 8 Earth Rotation parameters with their formal errors: - Pole coordinates x, y (")- UT1 - UTC (ms)- Celestial pole offsets dX, dY or dPsi, dEps (")- Pole coordinate rates xrt, yrt ("/day)- Length of day offset LOD (ms)2) Download from https://hpiers.obspm.fr/iers/eop/eopc04/4 versions: eopc04.1962-now : sampled values at 0hUT / dX, dY IAU 2000 eopc04.dPsi_dEps.1962-now : 0hUT / dPsi, dEps IAU 2000 eopc04.12h.1984-now : 12hUT / dX, dY IAU 2000 eopc04.dPsi_dEps.12h.1984-now : 12hUT / dPsi, dEps IAU 2000 3) From 1/1/1994 to 31/12/2020 the 12hUT values of the pole coordinates x,y and of their rates xrt and yrt exactly coincide with the corresponding values obtained for the ITRF 2020 solution. 4) Vondrak combined smoothing: from 1/1/1984 for UT1 and LOD from 1/1/2021 for x,y and ther rates 5) From 1/1/962 to 31/12/1984, ERP values of those of the C0414 solution6) Calibration of the formal uncertainties of the input individual ERP series according to the dispersion with other kindred series 7) Removal of systematic bias / annual terms with respect to ITRF 2020 solution (x, y) and IVS (UT1, dX, dY) 8) Centers contributing to x, y : ITRF 2020 (1994-2021), IGS F (1998-1994, 2021- ), ILRS (2021-), IDS (2021-), IVSR (2021-)UT1 : IVSF (1984-2020), IVSR (from 2021), IAA Intensive, USNO Intensive, BKG IntensivedX, dY : IVSF (1984-2020), IVSR (from 2021)xrt, yrt : ITRF 2020 (1994-2021), IGS F (1998-1994, 2021- ) LOD : IGS F (1998- ), IGS-R (current year), CODE (current year) |
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: ftp://hpiers.obspm.fr/iers/eop/eopc04/C04.guide.pdf Information on updates: http://hpiers.obspm.fr/iers/eop/eopc04/updateC04.txt Publications: |
Title | EOP 20 C04 series for 1962-2023 |
Data | Date [yyyy mm dd], 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 | 22513 |
Time Start | 1962-01-01 |
Time End | 2023-08-21 |
Time Interval | 1 day |
Accuracy | - Min Max Average Average (last 365 days)sigma_X ["] 0.000047 0.030000 0.006461 0.000064sigma_Y ["] 0.000039 0.030000 0.006436 0.000056sigma_UT1-UTC [s] 0.0000028 0.0040747 0.0005861 0.0000165sigma_LOD [s] 0.0000142 0.0014310 0.0003382 0.0000258sigma_dX ["] 0.000027 0.010457 0.001150 0.000120sigma_dY ["] 0.000024 0.006861 0.000832 0.000069 |
Keywords | EOP, Long term series, 20 C04, IAU 2006/2000A |
Frequency | daily |
Source | ftp://hpiers.obspm.fr/iers/eop/eopc04/ |
Created by | IERS Earth Orientation Centre |
Published by | IERS Earth Orientation Centre |
Date | 2023-09-20 |
Contact | services.iers@obspm.fr |
Distribution | onLine |