bulletinb-458.txt eng dataset Dr. Daniel Gambis Observatoire de Paris +33-1-4051-2229 +33-1-4051-2291 61, avenue de l Observatoire Paris 75014 France services.iers@obspm.fr http://hpiers.obspm.fr/eop-pc/ originator 2026-04-01 ISO19115 2003 http://hpiers.obspm.fr/iers/bul/bulb_new/bulletinb.458 IERS Bulletin B Number 458 Bulletin B 458 2026-04-01 creation Dr. Daniel Gambis Observatoire de Paris +33-1-4051-2229 +33-1-4051-2291 61, avenue de l Observatoire Paris 75014 France services.iers@obspm.fr http://hpiers.obspm.fr/eop-pc/ originator IERS Bulletin B provides current information on the Earth's orientation in the IERS Reference System. This includes Universal Time, coordinates of the terrestrial pole, and celestial pole offsets. IERS Bulletin B consists of 5 sections: Section 1: Daily final values at 0:00 UT of x, y, UT1-UTC, dX, dY, and their uncertainties. Time span: one month with final values, one month with preliminary values. Section 2: Daily final values at 0:00 UT of celestial pole offsets dPsi and dEps in the IAU 1980 system and their uncertainties. Section 3: Earth angular velocity (daily estimates of LOD and OMEGA with their uncertainties). Section 4: Information on the time scales and announcement of occurring leap seconds. Section 5: Average formal precision of the individual and combined series contributing or not to the combination and their agreement with the combination. onGoing Dr. Daniel Gambis Observatoire de Paris +33-1-4051-2229 +33-1-4051-2291 61, avenue de l Observatoire Paris 75014 France services.iers@obspm.fr http://hpiers.obspm.fr/eop-pc/ originator monthly EOP, monthly, BULLETIN B, Earth orientation parameter, Number 458 eng geoscientificInformation product category: EOP; product subcategory: MONTHLY_EOP; product name: BULLETIN_B -180 +180 -90 +90 2026-02-02 2026-04-01 documentation: See contents of the data files and ftp://hpiers.obspm.fr/iers/bul/bulb_new/bulletinb.pdf; data points: Section 1: 59 Section 2: 28 Section 3: 28; time interval of data: Section 1: 58 Section 2: 27 Section 3: 27; accuracy: Section 1: min max avg sigma_X [mas] 0.035 0.049 0.040 sigma_Y [mas] 0.034 0.051 0.040 sigma_UT1-UTC [ms] 0.0068 0.0143 0.0105 sigma_dX [mas] 0.059 0.732 0.130 sigma_dY [mas] 0.053 0.857 0.251 Section 2: sigma_dPSI [mas] 0.148 9.665 1.366 sigma_dEPS [mas] 0.053 4.374 1.119 Section 3: min max avg sigma_LOD [ms] 0.0063 0.0112 0.0078 sigma_OMEGA [mas/ms] 0.00000000110 0.00000000195 0.00000000137 ; data descprition: Section 1: Year[yyyy],Month [mm], Day [dd], MJD, x [marcsec], y [marcsec], UT1-UTC [ms], dX [marcsec], dY [marcsec],x err[marcsec], y err[marcsec],UT1 err[marcsec], X err[marcsec], Y err[marcsec], Section 2: Year[yyyy],Month [mm], Day [dd], MJD, dPsi1980[marcsec],dEps1980[marcsec],sig dPsi[marcsec],sig dEps[marcsec] Section 3: Year[yyyy],Month [mm], Day [dd], MJD,LOD[ms],sigma[ms],OMEGA[mas/ms],sigma[mas/ms], Section 4: TAI - UTC [s], Section 5: RMS of x [marcsec], y [mas ], UT1 [ms], LOD[ms], dX [marcsec], dY [marcsec], Number of points; published by: IERS Earth Orientation Centre; email subscription: http://hpiers.obspm.fr/eop-pc/products/bulletins/subscription.html OR http://www.iers.org/subscription.html; Available on http://www.iers.org/products : Dataset-files in .xml, .html and .csv format ASCII unknown Dr. Daniel Gambis Observatoire de Paris +33-1-4051-2229 +33-1-4051-2291 61, avenue de l Observatoire Paris 75014 France services.iers@obspm.fr http://hpiers.obspm.fr/eop-pc/ originator free of charge http://hpiers.obspm.fr/iers/bul/bulb_new/bulletinb.458 dataset