BULLETIN B 454 2 December 2025 Contents are described in https://hpiers.obspm.fr/iers/bul/bulb_new/bulletinb.pdf 1 - DAILY FINAL VALUES OF x, y, UT1-UTC, dX, dY Angular unit is milliarcsecond (mas), time unit is millisecond (ms). Upgraded solution from March 1 2017 - consistent with ITRF 2014. DATE MJD x y UT1-UTC dX dY x err y err UT1 err dX err dY err (0 h UTC) mas mas ms mas mas mas mas ms mas mas Final values Mean formal error 0.034 0.027 0.0425 0.087 0.224 2025 10 2 60950 224.161 339.829 93.4700 0.401 -0.046 0.034 0.027 0.0518 0.065 0.032 2025 10 3 60951 223.115 338.267 93.6620 0.400 -0.110 0.033 0.027 0.0650 0.085 0.041 2025 10 4 60952 221.997 336.956 93.5841 0.376 -0.131 0.033 0.027 0.0622 0.081 0.040 2025 10 5 60953 220.938 335.786 93.2489 0.338 -0.121 0.033 0.028 0.0499 0.064 0.032 2025 10 6 60954 219.935 334.613 92.7497 0.298 -0.096 0.033 0.028 0.0417 0.046 0.023 2025 10 7 60955 218.439 333.142 92.2102 0.262 -0.063 0.033 0.028 0.0380 0.032 0.017 2025 10 8 60956 217.071 331.539 91.7596 0.247 -0.026 0.033 0.028 0.0394 0.036 0.019 2025 10 9 60957 215.414 330.506 91.5476 0.244 0.008 0.033 0.028 0.0442 0.045 0.023 2025 10 10 60958 213.323 329.292 91.6356 0.249 0.034 0.033 0.027 0.0501 0.053 0.028 2025 10 11 60959 211.532 328.145 92.0248 0.264 0.030 0.034 0.027 0.0514 0.054 0.029 2025 10 12 60960 210.172 327.133 92.6440 0.284 0.007 0.034 0.027 0.0462 0.055 0.030 2025 10 13 60961 208.834 326.411 93.3544 0.307 -0.024 0.034 0.027 0.0406 0.055 0.031 2025 10 14 60962 207.190 325.842 94.0059 0.328 -0.056 0.034 0.027 0.0365 0.055 0.032 2025 10 15 60963 205.342 325.103 94.4850 0.340 -0.075 0.034 0.027 0.0345 0.064 0.039 2025 10 16 60964 203.386 324.324 94.7470 0.346 -0.086 0.034 0.027 0.0539 0.078 0.050 2025 10 17 60965 201.565 323.755 94.7655 0.349 -0.092 0.036 0.027 0.0589 0.091 0.060 2025 10 18 60966 199.490 322.934 94.5933 0.346 -0.101 0.035 0.027 0.0543 0.089 0.062 2025 10 19 60967 197.991 322.348 94.3069 0.340 -0.105 0.035 0.027 0.0462 0.078 0.062 2025 10 20 60968 196.477 322.082 93.9886 0.334 -0.099 0.034 0.028 0.0445 0.065 0.062 2025 10 21 60969 194.989 322.038 93.6914 0.333 -0.079 0.035 0.028 0.0429 0.057 0.062 2025 10 22 60970 193.285 322.433 93.4934 0.344 -0.018 0.036 0.029 0.0384 0.053 0.084 2025 10 23 60971 191.625 322.590 93.3993 0.360 0.055 0.036 0.029 0.0329 0.048 0.122 2025 10 24 60972 189.703 322.857 93.3822 0.381 0.124 0.037 0.029 0.0296 0.044 0.155 2025 10 25 60973 187.868 322.765 93.5035 0.411 0.155 0.035 0.028 0.0286 0.062 0.286 2025 10 26 60974 186.083 322.815 93.7690 0.443 0.158 0.035 0.028 0.0292 0.102 0.549 2025 10 27 60975 184.423 322.417 94.1098 0.470 0.144 0.035 0.028 0.0314 0.146 0.843 2025 10 28 60976 183.333 322.002 94.3772 0.486 0.118 0.034 0.028 0.0342 0.178 1.053 2025 10 29 60977 182.060 321.704 94.4757 0.472 0.079 0.034 0.028 0.0369 0.190 0.984 2025 10 30 60978 180.848 321.561 94.3323 0.445 0.036 0.034 0.027 0.0384 0.204 0.822 2025 10 31 60979 179.198 320.905 93.8742 0.414 -0.005 0.034 0.027 0.0346 0.216 0.677 2025 11 1 60980 177.265 320.165 93.1284 0.395 -0.025 0.034 0.027 0.0308 0.225 0.598 Preliminary extension 2025 11 2 60981 175.041 319.351 92.1955 0.384 -0.030 0.034 0.027 0.0289 0.236 0.493 2025 11 3 60982 173.490 318.707 91.1203 0.376 -0.029 0.032 0.025 0.0285 0.249 0.375 2025 11 4 60983 171.831 318.654 90.0404 0.370 -0.022 0.031 0.024 0.0288 0.259 0.292 2025 11 5 60984 169.937 318.306 89.1509 0.359 -0.014 0.030 0.023 0.0296 0.308 0.272 2025 11 6 60985 167.898 318.221 88.5301 0.351 -0.006 0.030 0.023 0.0307 0.387 0.259 2025 11 7 60986 165.876 317.847 88.2072 0.351 -0.002 0.029 0.022 0.0312 0.456 0.247 2025 11 8 60987 164.034 317.088 88.1303 0.380 -0.016 0.029 0.022 0.0310 0.469 0.251 2025 11 9 60988 162.966 316.281 88.1868 0.425 -0.039 0.029 0.022 0.0313 0.468 0.261 2025 11 10 60989 162.526 315.814 88.1852 0.466 -0.062 0.029 0.022 0.0321 0.466 0.272 2025 11 11 60990 161.545 315.281 87.9971 0.492 -0.078 0.030 0.022 0.0334 0.465 0.279 2025 11 12 60991 160.222 315.129 87.6212 0.543 -0.068 0.029 0.022 0.0352 0.441 0.313 2025 11 13 60992 158.378 315.357 87.1032 0.535 -0.047 0.029 0.022 0.0371 0.411 0.354 2025 11 14 60993 156.457 315.672 86.4271 0.407 -0.024 0.029 0.023 0.0410 0.393 0.380 2025 11 15 60994 154.558 315.949 85.6560 0.072 -0.004 0.029 0.023 0.0386 0.424 0.432 2025 11 16 60995 152.971 316.282 84.9198 -0.014 0.001 0.031 0.025 0.0369 0.451 0.468 2025 11 17 60996 151.099 316.687 84.3204 0.000 0.000 0.033 0.026 0.0383 0.465 0.487 2025 11 18 60997 149.154 316.465 83.8981 0.000 0.000 0.034 0.027 0.0420 0.472 0.497 2025 11 19 60998 147.420 316.251 83.6484 0.368 -0.074 0.035 0.027 0.0468 0.500 0.500 2025 11 20 60999 145.656 316.127 83.5609 0.367 -0.074 0.036 0.028 0.0435 0.500 0.500 2025 11 21 61000 143.755 315.687 83.6363 0.369 -0.068 0.036 0.028 0.0396 0.500 0.500 2025 11 22 61001 141.886 314.905 83.7956 0.375 -0.059 0.037 0.028 0.0361 0.500 0.500 2025 11 23 61002 139.764 314.279 84.0190 0.387 -0.053 0.037 0.029 0.0339 0.500 0.500 2025 11 24 61003 138.043 313.541 84.2364 0.400 -0.059 0.039 0.031 0.0326 0.500 0.500 2025 11 25 61004 137.292 313.692 84.3074 0.410 -0.077 0.041 0.033 0.0319 0.500 0.500 2025 11 26 61005 136.075 314.498 84.1704 0.413 -0.103 0.043 0.037 0.0317 0.500 0.500 2025 11 27 61006 135.095 314.959 83.7565 0.409 -0.126 0.047 0.043 0.0328 0.500 0.500 2025 11 28 61007 134.361 315.213 83.0403 0.397 -0.137 0.053 0.050 0.0336 0.500 0.500 2025 11 29 61008 133.404 315.281 82.0857 0.381 -0.131 0.062 0.062 0.0346 0.500 0.500 2025 11 30 61009 132.526 315.637 80.9707 0.364 -0.115 0.074 0.080 0.0369 0.500 0.500 2025 12 1 61010 131.517 315.999 79.8281 0.348 -0.097 0.092 0.105 0.0417 0.500 0.500 2 - DAILY FINAL VALUES OF CELESTIAL POLE OFFSETS dPsi1980 & dEps1980 dPsi1980 dEps1980 ....dPsi,dEps / IAU 1980 precession-nutation model Description : ftp://hpiers.obspm.fr/iers/bul/bulb_new/bulletinb.pdf The Reference Systems are described in the 2006 IERS Annual Report. DATE MJD dPsi1980 dEps1980 sig dPsi sig dEps (0 h UTC) mas mas mas mas 2025 10 2 60950 -120.388 -10.397 0.164 0.032 2025 10 3 60951 -120.356 -10.278 0.213 0.041 2025 10 4 60952 -120.565 -10.199 0.204 0.040 2025 10 5 60953 -120.837 -10.082 0.162 0.032 2025 10 6 60954 -121.042 -9.863 0.115 0.023 2025 10 7 60955 -121.189 -9.664 0.081 0.017 2025 10 8 60956 -121.216 -9.656 0.090 0.019 2025 10 9 60957 -121.079 -9.781 0.112 0.023 2025 10 10 60958 -120.861 -9.812 0.132 0.028 2025 10 11 60959 -120.735 -9.710 0.137 0.029 2025 10 12 60960 -120.719 -9.644 0.138 0.030 2025 10 13 60961 -120.632 -9.738 0.139 0.031 2025 10 14 60962 -120.354 -9.885 0.139 0.032 2025 10 15 60963 -119.969 -9.892 0.161 0.039 2025 10 16 60964 -119.586 -9.730 0.197 0.050 2025 10 17 60965 -119.265 -9.487 0.230 0.060 2025 10 18 60966 -119.049 -9.224 0.223 0.062 2025 10 19 60967 -118.938 -8.945 0.195 0.062 2025 10 20 60968 -118.899 -8.712 0.164 0.062 2025 10 21 60969 -118.906 -8.663 0.142 0.062 2025 10 22 60970 -118.948 -8.845 0.132 0.084 2025 10 23 60971 -119.003 -9.161 0.121 0.122 2025 10 24 60972 -118.955 -9.396 0.111 0.155 2025 10 25 60973 -118.691 -9.475 0.156 0.286 2025 10 26 60974 -118.292 -9.483 0.256 0.549 2025 10 27 60975 -117.932 -9.534 0.367 0.843 2025 10 28 60976 -117.681 -9.593 0.446 1.053 2025 10 29 60977 -117.515 -9.529 0.479 0.984 2025 10 30 60978 -117.382 -9.327 0.513 0.822 2025 10 31 60979 -117.371 -9.149 0.544 0.677 2025 11 1 60980 -117.491 -9.086 0.564 0.598 3 - EARTH ANGULAR VELOCITY : DAILY FINAL VALUES OF LOD, OMEGA AT 0hUTC LOD : Excess of the Length of day - 86400 s TAI OMEGA : Earth angular velocity Description: ftp://hpiers.obspm.fr/iers/bul/bulb_new/bulletinb.pdf DATE MJD LOD sigma OMEGA sigma (0 h UTC) ms ms mas/ms mas/ms 2025 10 2 60950 -0.3124 0.0120 15.04106723305 0.00000000209 2025 10 3 60951 -0.0588 0.0124 15.04106718891 0.00000000216 2025 10 4 60952 0.2146 0.0121 15.04106714131 0.00000000211 2025 10 5 60953 0.4384 0.0133 15.04106710235 0.00000000232 2025 10 6 60954 0.5434 0.0136 15.04106708407 0.00000000237 2025 10 7 60955 0.5175 0.0132 15.04106708858 0.00000000230 2025 10 8 60956 0.3512 0.0124 15.04106711753 0.00000000216 2025 10 9 60957 0.0629 0.0123 15.04106716772 0.00000000214 2025 10 10 60958 -0.2474 0.0125 15.04106722174 0.00000000218 2025 10 11 60959 -0.5213 0.0128 15.04106726942 0.00000000223 2025 10 12 60960 -0.6903 0.0130 15.04106729884 0.00000000226 2025 10 13 60961 -0.7032 0.0126 15.04106730109 0.00000000219 2025 10 14 60962 -0.5812 0.0126 15.04106727985 0.00000000219 2025 10 15 60963 -0.3745 0.0121 15.04106724387 0.00000000211 2025 10 16 60964 -0.1503 0.0120 15.04106720484 0.00000000209 2025 10 17 60965 0.0882 0.0118 15.04106716332 0.00000000205 2025 10 18 60966 0.2434 0.0119 15.04106713630 0.00000000207 2025 10 19 60967 0.3187 0.0120 15.04106712319 0.00000000209 2025 10 20 60968 0.3183 0.0121 15.04106712326 0.00000000211 2025 10 21 60969 0.2587 0.0126 15.04106713363 0.00000000219 2025 10 22 60970 0.1477 0.0126 15.04106715296 0.00000000219 2025 10 23 60971 0.0466 0.0135 15.04106717056 0.00000000235 2025 10 24 60972 -0.0439 0.0136 15.04106718631 0.00000000237 2025 10 25 60973 -0.1949 0.0133 15.04106721260 0.00000000232 2025 10 26 60974 -0.3169 0.0135 15.04106723384 0.00000000235 2025 10 27 60975 -0.3306 0.0134 15.04106723622 0.00000000233 2025 10 28 60976 -0.1982 0.0136 15.04106721317 0.00000000237 2025 10 29 60977 0.0128 0.0135 15.04106717644 0.00000000235 2025 10 30 60978 0.2902 0.0140 15.04106712815 0.00000000244 2025 10 31 60979 0.6107 0.0143 15.04106707236 0.00000000249 2025 11 1 60980 0.8620 0.0136 15.04106702861 0.00000000237 4 - INFORMATION ON TIME SCALES TAI - UTC = 37 s. during period [60950-60980] No leap second introduced during period [60950-60980] All information concerning time scales : - leap seconds announcements : Bulletin C - DUT1 announcements (UT1-UTC with 0.1 s accuracy) : Bulletin D can be found at : - web site : http://hpiers.obspm.fr/eop-pc/ - anonymous ftp://hpiers.obspm.fr/iers/ 5 - SUMMARY OF CONTRIBUTED EARTH ORIENTATION PARAMETERS SERIES This section gives the average precision of the individual series, some of them contributing to the combination (*) and their average agreement with it. The period covered is that one of Bulletin B. Units : micro-arc-seconds for x/y/dX/dY micro-seconds for UT1/LOD ----------------------------------------------------------------------------- EOP series first line : Mean formal uncertainty Periods covered second line : Weighted RMS agreement with Bulletin B ----------------------------------------------------------------------------- x y UT1 LOD dX dY Data Number VLBI Standards BKG bkg2025b.eoxy 43 55 3 - 33 30 12 60951.27 to 60979.27 101 137 33 - 43 72 GSFC gsf2023a.eoxy 51 57 3 9 36 33 12 60951.27 to 60979.27 156 178 30 27 49 54 IAA iaa2021a.eops 38 59 3 - 42 40 4 60951.27 to 60962.21 198 85 27 - 49 84 USNO usn2025a.eoxy 38 48 3 - 44 39 9 60951.27 to 60979.27 69 70 28 - 31 34 OPA opa2025a.eops 67 101 13 - 133 149 8 60951.27 to 60972.27 5681 7889 137 - 9231 8293 IVS * ivs2025a.eoxy 326 526 30 - 256 237 7 60951.28 to 60972.27 101 107 7 - 2 5 VIE vie2023a.eopxy 179 257 13 - - - 18 60951.00 to 60980.00 313 690 15 - - - VIE vie2023a.eoxy - - - - 39 44 10 60951.27 to 60979.27 - - - - 28 73 VLBI Intensive GSI * gsiint2d.eopi - - 17 - - - 6 60952.33 to 60974.33 - - 27 - - - BKG * bkg2025b.eopi - - 12 - - - 52 60950.75 to 60979.75 - - 68 - - - GSFC * gsf2023a.eopi - - 32 - - - 85 60950.75 to 60980.00 - - 98 - - - IAA * iaa2021a.eopi - - 10 - - - 75 60950.75 to 60980.00 - - 67 - - - IAA * iaaq.eopi - - 57 - - - 29 60950.31 to 60979.31 - - 61 - - - USNO * usn2025a.eopi - - 29 - - - 74 60950.75 to 60980.00 - - 576 - - - OPA opa2025a.eopi - - 3 - - - 1 60962.84 to 60962.84 - - 0 - - - VIE vie2023a.eopi - - 14 - - - 83 60950.75 to 60980.00 - - 85 - - - DGFI dgf2024a.eopi - - 18 - - - 32 60950.75 to 60979.75 - - 125 - - - GPS CODE COD0OPSFIN 3 3 - 0 - - 30 60950.50 to 60979.50 26 23 - 13 - - JPL JPL0OPSFIN 4 5 - 3 - - 30 60950.50 to 60979.50 32 32 - 21 - - GFZ GFZ0OPSFIN 4 4 - 1 - - 30 60950.50 to 60979.50 32 24 - 14 - - ESA ESA0OPSFIN 5 5 - 1 - - 30 60950.50 to 60979.50 30 26 - 11 - - SIO SIO0OPSFIN 25 23 - 10 - - 30 60950.50 to 60979.50 40 35 - 22 - - EMR EMR0OPSRAP 3 3 - 1 - - 30 60950.50 to 60979.50 58 49 - 11 - - IAA gnss.res 0 0 - 0 - - 28 60950.50 to 60979.50 41 57 - 33 - - GRGS GRG0OPSFIN 272 272 - 0 - - 30 60950.50 to 60979.50 27 24 - 16 - - ASI asi*.erp 10 10 - 0 - - 16 60950.50 to 60979.50 14 14 - 49 - - MIT MIT0OPSFIN 9 9 - 1 - - 30 60950.50 to 60979.50 42 31 - 17 - - IGS * IGS0OPSRAP 10 8 - 2 - - 30 60950.50 to 60979.50 27 29 - 12 - - IGS * IGS0OPSFIN 6 5 - 2 - - 30 60950.50 to 60979.50 25 22 - 12 - - SLR MCC tg*.02 219 215 - 46 - - 31 60950.00 to 60980.00 116 143 - 189 - - IAA slr_v.dat 84 86 - 5 - - 29 60950.00 to 60980.00 234 269 - 30 - - ILRS * ilrsa.eop 47 45 - 9 - - 30 60950.50 to 60979.50 160 154 - 29 - - BULLETIN A NEOS mark3.out 11 14 11 - - - 31 60950.00 to 60980.00 36 38 19 - - - To unsubscribe : http://hpiers.obspm.fr/eop-pc/products/bulletins/bulletin_registration.html