BULLETIN B 463 3 September 2026 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 C04 solution - consistent with ITRF 2020. 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 0.043 0.042 0.0536 698011.887 0.082 2026 7 2 61223 205.411 388.538 14.8279 0.336 -0.314 0.055 0.051 0.0864 26.828 12.016 2026 7 3 61224 205.712 387.688 14.8872 0.334 -0.329 0.056 0.050 0.1970 32.305 14.425 2026 7 4 61225 206.180 386.495 14.6670 0.342 -0.336 0.051 0.051 0.0685 12.575 14.431 2026 7 5 61226 207.503 385.226 14.2170 0.346 -0.330 0.051 0.052 0.0225 11.011 12.636 2026 7 6 61227 209.167 384.651 13.6101 0.351 -0.326 0.050 0.050 0.0141 0.130 0.147 2026 7 7 61228 210.512 384.086 12.9274 0.357 -0.318 0.041 0.041 0.0286 0.098 0.112 2026 7 8 61229 211.592 383.771 12.2341 0.364 -0.310 0.041 0.039 0.0378 0.362 0.856 2026 7 9 61230 211.868 383.280 11.6559 0.371 -0.301 0.041 0.038 0.0715 20.864 58.785 2026 7 10 61231 211.963 382.638 11.3284 0.377 -0.291 0.041 0.039 0.2265 25.250 71.178 2026 7 11 61232 211.697 382.175 11.2853 0.381 -0.283 0.041 0.040 0.0991 25.261 71.208 2026 7 12 61233 211.737 381.369 11.4392 0.383 -0.277 0.041 0.039 0.0471 22.830 62.125 2026 7 13 61234 211.916 380.319 11.6833 0.382 -0.271 0.043 0.042 0.0385 6.527 1.208 2026 7 14 61235 212.241 378.978 11.8348 0.379 -0.266 0.040 0.040 0.0541 6.480 1.032 2026 7 15 61236 212.698 377.732 11.7940 0.370 -0.264 0.040 0.040 0.0654 6.458 1.147 2026 7 16 61237 212.907 376.455 11.5361 0.360 -0.263 0.040 0.040 0.0736 4.741 10.187 2026 7 17 61238 213.800 375.209 11.0654 0.350 -0.260 0.042 0.042 0.1096 4.380 12.084 2026 7 18 61239 214.896 374.372 10.4704 0.341 -0.253 0.043 0.043 0.0501 4.379 12.089 2026 7 19 61240 215.342 373.320 9.8935 0.336 -0.242 0.045 0.040 0.0269 3.877 10.646 2026 7 20 61241 215.502 372.315 9.4448 0.336 -0.229 0.042 0.040 0.0249 0.282 0.317 2026 7 21 61242 215.928 371.355 9.2114 0.344 -0.213 0.041 0.040 0.0330 0.271 0.285 2026 7 22 61243 217.111 370.794 9.1874 0.373 -0.190 0.041 0.040 0.0334 0.270 0.284 2026 7 23 61244 217.871 370.140 9.3627 0.407 -0.166 0.042 0.040 0.0288 0.165 0.175 2026 7 24 61245 218.616 369.544 9.7405 0.436 -0.148 0.043 0.040 0.0295 0.142 0.151 2026 7 25 61246 219.171 369.117 10.2709 0.428 -0.146 0.044 0.039 0.0250 0.142 0.151 2026 7 26 61247 219.348 368.692 10.9028 0.398 -0.157 0.043 0.041 0.0198 0.135 0.142 2026 7 27 61248 219.421 368.229 11.5864 0.363 -0.177 0.043 0.041 0.0212 0.088 0.084 2026 7 28 61249 219.109 367.338 12.1956 0.333 -0.203 0.039 0.040 0.0261 0.087 0.084 2026 7 29 61250 219.187 366.314 12.6765 0.334 -0.240 0.039 0.040 0.0265 0.088 0.085 2026 7 30 61251 219.679 365.849 12.9423 0.348 -0.277 0.050 0.052 0.0254 0.121 0.144 2026 7 31 61252 220.394 365.337 12.9378 0.367 -0.309 0.051 0.053 0.0272 0.127 0.156 2026 8 1 61253 221.536 364.940 12.7081 0.380 -0.323 0.041 0.043 0.0243 0.127 0.156 Preliminary extension 2026 8 2 61254 222.428 364.675 12.2951 0.391 -0.321 0.045 0.044 0.0204 0.124 0.149 2026 8 3 61255 222.732 363.935 11.7718 0.400 -0.304 0.045 0.042 0.0214 0.108 0.102 2026 8 4 61256 222.616 362.931 11.2588 0.406 -0.270 0.042 0.042 0.0262 0.108 0.102 2026 8 5 61257 222.684 361.668 10.8384 0.409 -0.201 0.034 0.035 0.0293 0.108 0.102 2026 8 6 61258 222.935 360.819 10.6072 0.410 -0.124 0.032 0.033 0.0300 0.139 0.122 2026 8 7 61259 223.046 360.000 10.5897 0.409 -0.057 0.031 0.033 0.0287 0.146 0.126 2026 8 8 61260 223.536 359.526 10.7781 0.407 -0.049 0.031 0.033 0.0229 0.146 0.126 2026 8 9 61261 223.632 359.138 11.1339 0.405 -0.080 0.031 0.033 0.0181 0.145 0.124 2026 8 10 61262 223.268 358.685 11.5073 0.401 -0.126 0.031 0.033 0.0198 0.142 0.108 2026 8 11 61263 222.830 357.835 11.7187 0.396 -0.177 0.031 0.033 0.0252 0.142 0.108 2026 8 12 61264 222.834 356.949 11.6176 0.389 -0.206 0.031 0.033 0.0260 0.141 0.108 2026 8 13 61265 223.019 356.243 11.1514 0.381 -0.226 0.031 0.033 0.0228 0.085 0.076 2026 8 14 61266 223.092 355.091 10.3788 0.373 -0.240 0.031 0.033 0.0199 0.074 0.070 2026 8 15 61267 223.155 354.146 9.4551 0.363 -0.252 0.031 0.034 0.0185 0.074 0.070 2026 8 16 61268 223.024 352.995 8.5488 0.355 -0.260 0.034 0.036 0.0194 0.074 0.070 2026 8 17 61269 222.515 351.991 7.7974 0.351 -0.260 0.037 0.039 0.0245 0.074 0.068 2026 8 18 61270 221.621 351.137 7.2304 0.353 -0.250 0.038 0.041 0.0302 0.074 0.067 2026 8 19 61271 220.746 350.271 6.8844 0.416 -0.252 0.037 0.041 0.0300 0.073 0.065 2026 8 20 61272 219.588 349.530 6.7510 0.289 -0.065 0.037 0.040 0.0264 0.500 0.500 2026 8 21 61273 218.559 348.744 6.7696 0.300 -0.067 0.037 0.040 0.0216 0.500 0.500 2026 8 22 61274 217.552 347.811 6.8744 0.308 -0.072 0.037 0.041 0.0225 0.500 0.500 2026 8 23 61275 216.460 346.706 6.9912 0.314 -0.077 0.037 0.041 0.0303 0.500 0.500 2026 8 24 61276 215.283 345.649 7.0743 0.317 -0.079 0.037 0.041 0.0383 0.500 0.500 2026 8 25 61277 214.265 344.650 7.0564 0.318 -0.083 0.037 0.040 0.0352 0.500 0.500 2026 8 26 61278 213.332 343.651 6.8789 0.316 -0.092 0.037 0.040 0.0258 0.500 0.500 2026 8 27 61279 213.022 342.354 6.4953 0.312 -0.108 0.037 0.041 0.0233 0.500 0.500 2026 8 28 61280 212.835 341.452 5.8891 0.307 -0.128 0.037 0.041 0.0208 0.500 0.500 2026 8 29 61281 212.521 340.586 5.0972 0.301 -0.144 0.037 0.041 0.0176 0.500 0.500 2026 8 30 61282 212.055 339.931 4.1643 0.291 -0.147 0.039 0.041 0.0148 0.500 0.500 2026 8 31 61283 211.376 339.558 3.2436 0.280 -0.133 0.041 0.041 0.0168 0.500 0.500 2026 9 1 61284 210.839 339.278 2.4085 0.267 -0.109 0.040 0.043 0.0230 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 2026 7 2 61223 -117.364 -11.996 67.440 12.016 2026 7 3 61224 -117.414 -11.857 81.209 14.425 2026 7 4 61225 -117.490 -11.841 31.611 14.431 2026 7 5 61226 -117.571 -11.841 27.680 12.636 2026 7 6 61227 -117.641 -11.854 0.327 0.147 2026 7 7 61228 -117.792 -11.936 0.247 0.112 2026 7 8 61229 -118.094 -12.074 0.910 0.856 2026 7 9 61230 -118.511 -12.162 52.449 58.785 2026 7 10 61231 -118.934 -12.161 63.474 71.178 2026 7 11 61232 -119.218 -12.171 63.502 71.208 2026 7 12 61233 -119.231 -12.249 57.391 62.125 2026 7 13 61234 -119.016 -12.267 16.408 1.208 2026 7 14 61235 -118.819 -12.102 16.289 1.032 2026 7 15 61236 -118.816 -11.880 16.234 1.147 2026 7 16 61237 -118.909 -11.824 11.917 10.187 2026 7 17 61238 -119.008 -11.927 11.011 12.084 2026 7 18 61239 -119.296 -11.964 11.008 12.089 2026 7 19 61240 -119.956 -11.839 9.746 10.646 2026 7 20 61241 -120.755 -11.717 0.708 0.317 2026 7 21 61242 -121.218 -11.768 0.681 0.285 2026 7 22 61243 -121.146 -11.923 0.678 0.284 2026 7 23 61244 -120.851 -12.007 0.415 0.175 2026 7 24 61245 -120.681 -11.969 0.358 0.151 2026 7 25 61246 -120.784 -11.941 0.358 0.151 2026 7 26 61247 -121.028 -12.020 0.340 0.142 2026 7 27 61248 -121.296 -12.119 0.220 0.084 2026 7 28 61249 -121.523 -12.072 0.220 0.084 2026 7 29 61250 -121.595 -11.848 0.221 0.085 2026 7 30 61251 -121.550 -11.599 0.303 0.144 2026 7 31 61252 -121.498 -11.507 0.320 0.156 2026 8 1 61253 -121.564 -11.597 0.320 0.156 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 2026 7 2 61223 -0.2107 0.0075 15.04106721535 0.00000000131 2026 7 3 61224 0.0835 0.0096 15.04106716413 0.00000000167 2026 7 4 61225 0.3451 0.0089 15.04106711859 0.00000000155 2026 7 5 61226 0.5507 0.0131 15.04106708280 0.00000000228 2026 7 6 61227 0.6624 0.0124 15.04106706336 0.00000000216 2026 7 7 61228 0.7039 0.0199 15.04106705613 0.00000000346 2026 7 8 61229 0.6557 0.0162 15.04106706452 0.00000000282 2026 7 9 61230 0.4721 0.0167 15.04106709648 0.00000000291 2026 7 10 61231 0.1859 0.0187 15.04106714631 0.00000000326 2026 7 11 61232 -0.0777 0.0175 15.04106719220 0.00000000305 2026 7 12 61233 -0.2238 0.0204 15.04106721763 0.00000000355 2026 7 13 61234 -0.2313 0.0203 15.04106721894 0.00000000353 2026 7 14 61235 -0.0650 0.0190 15.04106718999 0.00000000331 2026 7 15 61236 0.1527 0.0167 15.04106715209 0.00000000291 2026 7 16 61237 0.3719 0.0173 15.04106711393 0.00000000301 2026 7 17 61238 0.5530 0.0205 15.04106708240 0.00000000357 2026 7 18 61239 0.6126 0.0183 15.04106707202 0.00000000319 2026 7 19 61240 0.5316 0.0208 15.04106708613 0.00000000362 2026 7 20 61241 0.3513 0.0197 15.04106711751 0.00000000343 2026 7 21 61242 0.1241 0.0183 15.04106715707 0.00000000319 2026 7 22 61243 -0.0797 0.0158 15.04106719255 0.00000000275 2026 7 23 61244 -0.2775 0.0164 15.04106722698 0.00000000286 2026 7 24 61245 -0.4648 0.0181 15.04106725959 0.00000000315 2026 7 25 61246 -0.5908 0.0168 15.04106728152 0.00000000292 2026 7 26 61247 -0.6680 0.0194 15.04106729496 0.00000000338 2026 7 27 61248 -0.6696 0.0196 15.04106729524 0.00000000341 2026 7 28 61249 -0.5521 0.0180 15.04106727478 0.00000000313 2026 7 29 61250 -0.3858 0.0161 15.04106724583 0.00000000280 2026 7 30 61251 -0.1355 0.0184 15.04106720226 0.00000000320 2026 7 31 61252 0.1290 0.0189 15.04106715621 0.00000000329 2026 8 1 61253 0.3311 0.0174 15.04106712103 0.00000000303 4 - INFORMATION ON TIME SCALES TAI - UTC = 37 s. during period [61223-61253] No leap second introduced during period [61223-61253] 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 54 56 3 - 37 41 13 61224.27 to 61252.27 98 130 20 - 78 65 GSFC gsf2023a.eoxy 70 89 4 11 53 58 15 61224.27 to 61252.27 205 214 22 11 71 83 IAA iaa2021a.eops 76 68 4 - 45 44 8 61224.27 to 61245.27 155 180 25 - 86 46 USNO usn2025b.eoxy 76 99 4 - 78 78 11 61224.27 to 61252.27 226 107 18 - 33 39 IVS * ivs2025a.eoxy 1174 923 59 - 506 567 9 61224.27 to 61252.26 213 146 11 - 4 3 ASI asi2023a.eoxy 220 271 16 - 237 194 14 61224.27 to 61252.27 3652 2269 54 - 170 88 VIE vie2025b.eopxy 226 255 12 - - - 18 61224.00 to 61250.00 278 190 10 - - - VIE vie2025b.eoxy - - - - 56 66 11 61224.27 to 61249.21 - - - - 29 77 VLBI Intensive GSI * gsiint2d.eopi - - 9 - - - 8 61225.33 to 61247.33 - - 26 - - - BKG * bkg2025b.eopi - - 41 - - - 62 61223.00 to 61253.00 - - 2106 - - - GSFC * gsf2023a.eopi - - 18 - - - 71 61223.00 to 61253.00 - - 675 - - - IAA * iaa2021a.eopi - - 29 - - - 73 61223.00 to 61253.00 - - 120 - - - IAA * iaaq.eopi - - 32 - - - 30 61223.54 to 61252.31 - - 109 - - - USNO * usn2025b.eopi - - 17 - - - 61 61223.00 to 61253.00 - - 592 - - - VIE vie2025b.eopi - - 10 - - - 72 61223.00 to 61253.00 - - 26 - - - GPS CODE COD0OPSFIN 3 3 - 0 - - 30 61223.50 to 61252.50 42 22 - 8 - - JPL JPL0OPSFIN 4 4 - 3 - - 30 61223.50 to 61252.50 52 29 - 13 - - GFZ GFZ0OPSFIN 6 6 - 1 - - 30 61223.50 to 61252.50 42 29 - 9 - - ESA ESA0OPSFIN 4 5 - 1 - - 30 61223.50 to 61252.50 44 26 - 7 - - JGX JGX0OPSFIN 2 2 - 0 - - 30 61223.50 to 61252.50 37 22 - 7 - - SIO SIO0OPSFIN 23 22 - 9 - - 30 61223.50 to 61252.50 48 37 - 14 - - EMR EMR0OPSRAP 3 2 - 0 - - 30 61223.50 to 61252.50 55 37 - 10 - - IAA gnss.res 0 0 - 0 - - 30 61223.50 to 61252.50 70 68 - 17 - - GRGS GRG0OPSFIN 264 264 - 0 - - 30 61223.50 to 61252.50 31 24 - 10 - - MIT MIT0OPSFIN 9 9 - 1 - - 30 61223.50 to 61252.50 61 33 - 10 - - IGS * IGS0OPSRAP 9 7 - 2 - - 30 61223.50 to 61252.50 40 24 - 7 - - IGS * IGS0OPSFIN 8 7 - 2 - - 30 61223.50 to 61252.50 37 24 - 9 - - SLR MCC tg*.02 193 255 - 38 - - 31 61223.00 to 61253.00 136 202 - 232 - - IAA slr_v.dat 70 99 - 5 - - 24 61224.00 to 61252.00 218 285 - 33 - - ASI asi.*.eop 58 89 - 14 - - 30 61223.50 to 61252.50 199 277 - 52 - - ILRS * ilrsa.eop 39 55 - 9 - - 30 61223.50 to 61252.50 182 164 - 30 - - BULLETIN A NEOS mark3.out 17 19 14 - - - 31 61223.00 to 61253.00 39 37 17 - - - To unsubscribe : http://hpiers.obspm.fr/eop-pc/products/bulletins/bulletin_registration.html