BULLETIN B 449 2 July 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 0.035 0.028 0.0219 0.015 0.008 2025 5 2 60797 86.539 418.002 30.0650 0.441 -0.191 0.041 0.028 0.0334 0.019 0.013 2025 5 3 60798 87.349 419.121 30.3058 0.510 -0.192 0.039 0.028 0.0289 0.018 0.013 2025 5 4 60799 88.202 420.175 30.3890 0.532 -0.190 0.038 0.028 0.0254 0.017 0.011 2025 5 5 60800 88.864 421.206 30.3144 0.523 -0.185 0.037 0.028 0.0225 0.015 0.010 2025 5 6 60801 89.757 422.104 30.0589 0.486 -0.175 0.037 0.029 0.0237 0.014 0.008 2025 5 7 60802 90.688 423.210 29.7043 0.413 -0.156 0.036 0.029 0.0201 0.015 0.008 2025 5 8 60803 91.485 423.791 29.3195 0.332 -0.139 0.037 0.029 0.0203 0.017 0.009 2025 5 9 60804 92.520 424.370 28.9841 0.309 -0.158 0.037 0.030 0.0199 0.017 0.009 2025 5 10 60805 93.881 424.736 28.7399 0.336 -0.206 0.038 0.029 0.0194 0.016 0.009 2025 5 11 60806 95.486 425.144 28.5547 0.386 -0.258 0.036 0.028 0.0191 0.015 0.008 2025 5 12 60807 97.038 425.922 28.4913 0.442 -0.303 0.034 0.027 0.0189 0.014 0.008 2025 5 13 60808 98.025 426.818 28.5729 0.492 -0.325 0.033 0.027 0.0187 0.014 0.008 2025 5 14 60809 99.019 427.732 28.8001 0.482 -0.261 0.033 0.027 0.0188 0.013 0.008 2025 5 15 60810 100.147 428.824 29.1549 0.453 -0.173 0.033 0.027 0.0188 0.013 0.007 2025 5 16 60811 100.787 429.950 29.5788 0.424 -0.092 0.033 0.027 0.0182 0.012 0.007 2025 5 17 60812 101.209 430.854 29.9939 0.419 -0.074 0.034 0.027 0.0181 0.012 0.007 2025 5 18 60813 101.629 431.608 30.3416 0.428 -0.099 0.035 0.028 0.0189 0.013 0.007 2025 5 19 60814 102.696 431.809 30.5626 0.439 -0.139 0.034 0.028 0.0196 0.013 0.007 2025 5 20 60815 103.954 432.111 30.6132 0.445 -0.183 0.034 0.028 0.0205 0.013 0.008 2025 5 21 60816 105.195 432.848 30.4189 0.427 -0.206 0.033 0.028 0.0225 0.016 0.008 2025 5 22 60817 106.260 433.784 29.9774 0.400 -0.217 0.033 0.029 0.0252 0.019 0.010 2025 5 23 60818 107.338 434.582 29.3102 0.374 -0.221 0.034 0.030 0.0275 0.022 0.012 2025 5 24 60819 108.134 435.582 28.5589 0.368 -0.209 0.035 0.032 0.0265 0.022 0.011 2025 5 25 60820 108.561 436.470 27.9053 0.375 -0.186 0.036 0.032 0.0245 0.019 0.010 2025 5 26 60821 109.641 436.821 27.4779 0.387 -0.161 0.036 0.030 0.0230 0.016 0.009 2025 5 27 60822 110.646 437.302 27.4448 0.400 -0.136 0.035 0.029 0.0221 0.013 0.008 2025 5 28 60823 111.350 437.526 27.7227 0.409 -0.121 0.034 0.029 0.0210 0.013 0.008 2025 5 29 60824 111.622 438.023 28.1256 0.414 -0.113 0.033 0.028 0.0199 0.013 0.008 2025 5 30 60825 111.988 437.539 28.5070 0.415 -0.112 0.033 0.029 0.0202 0.014 0.008 2025 5 31 60826 112.659 437.389 28.8129 0.386 -0.139 0.033 0.029 0.0210 0.015 0.008 2025 6 1 60827 113.193 437.680 28.9921 0.343 -0.182 0.033 0.030 0.0221 0.017 0.010 Preliminary extension 2025 6 2 60828 114.138 437.996 29.0266 0.305 -0.225 0.032 0.030 0.0221 0.020 0.011 2025 6 3 60829 115.445 438.399 28.9626 0.282 -0.262 0.030 0.028 0.0214 0.023 0.012 2025 6 4 60830 117.199 438.983 28.8460 0.285 -0.282 0.029 0.025 0.0199 0.024 0.012 2025 6 5 60831 118.727 439.875 28.7429 0.351 -0.266 0.028 0.024 0.0188 0.032 0.016 2025 6 6 60832 120.185 440.254 28.6821 0.426 -0.237 0.028 0.023 0.0182 0.044 0.021 2025 6 7 60833 121.691 440.764 28.7054 0.452 -0.209 0.027 0.022 0.0182 0.075 0.034 2025 6 8 60834 123.155 441.032 28.9133 0.435 -0.185 0.027 0.022 0.0186 0.139 0.061 2025 6 9 60835 124.771 441.503 29.3611 0.396 -0.166 0.027 0.022 0.0186 0.213 0.093 2025 6 10 60836 126.192 441.978 30.0330 0.347 -0.156 0.027 0.022 0.0183 0.267 0.116 2025 6 11 60837 127.601 442.519 30.8535 0.307 -0.162 0.028 0.023 0.0178 0.479 0.206 2025 6 12 60838 129.062 442.809 31.7722 0.277 -0.179 0.028 0.023 0.0176 0.802 0.343 2025 6 13 60839 130.743 442.812 32.7284 0.261 -0.201 0.029 0.023 0.0177 1.073 0.458 2025 6 14 60840 132.540 442.654 33.6065 0.409 -0.302 0.030 0.024 0.0185 0.991 0.474 2025 6 15 60841 134.708 442.380 34.2995 0.594 -0.411 0.032 0.025 0.0200 0.770 0.464 2025 6 16 60842 136.969 442.558 34.7900 0.670 -0.446 0.034 0.026 0.0216 0.590 0.455 2025 6 17 60843 138.866 442.680 35.0668 0.547 -0.355 0.034 0.027 0.0224 0.491 0.450 2025 6 18 60844 140.588 442.854 35.1232 0.355 -0.239 0.035 0.028 0.0228 0.500 0.500 2025 6 19 60845 142.031 443.065 35.0512 0.344 -0.225 0.035 0.028 0.0229 0.500 0.500 2025 6 20 60846 143.547 442.684 34.9300 0.335 -0.210 0.036 0.029 0.0231 0.500 0.500 2025 6 21 60847 145.215 442.553 34.8999 0.325 -0.199 0.036 0.029 0.0236 0.500 0.500 2025 6 22 60848 146.801 442.303 35.1555 0.316 -0.197 0.037 0.030 0.0241 0.500 0.500 2025 6 23 60849 148.550 441.974 35.8420 0.310 -0.200 0.037 0.031 0.0246 0.500 0.500 2025 6 24 60850 150.183 441.610 36.8267 0.312 -0.207 0.039 0.032 0.0253 0.500 0.500 2025 6 25 60851 151.784 441.092 37.9657 0.322 -0.212 0.040 0.035 0.0264 0.500 0.500 2025 6 26 60852 153.275 440.678 39.1872 0.337 -0.216 0.043 0.040 0.0268 0.500 0.500 2025 6 27 60853 154.717 440.342 40.3685 0.353 -0.220 0.048 0.047 0.0269 0.500 0.500 2025 6 28 60854 156.421 440.096 41.3894 0.363 -0.224 0.055 0.058 0.0277 0.500 0.500 2025 6 29 60855 158.501 440.049 42.2212 0.365 -0.227 0.066 0.075 0.0300 0.500 0.500 2025 6 30 60856 160.298 440.018 42.8963 0.360 -0.226 0.082 0.099 0.0345 0.500 0.500 2025 7 1 60857 162.072 439.847 43.4365 0.353 -0.218 0.105 0.132 0.0416 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 5 2 60797 -109.827 -11.918 0.048 0.013 2025 5 3 60798 -109.058 -12.139 0.047 0.013 2025 5 4 60799 -108.757 -12.004 0.043 0.011 2025 5 5 60800 -108.949 -11.572 0.038 0.010 2025 5 6 60801 -109.344 -11.116 0.036 0.008 2025 5 7 60802 -109.661 -10.823 0.038 0.008 2025 5 8 60803 -109.802 -10.663 0.042 0.009 2025 5 9 60804 -109.762 -10.573 0.042 0.009 2025 5 10 60805 -109.662 -10.584 0.041 0.009 2025 5 11 60806 -109.565 -10.815 0.038 0.008 2025 5 12 60807 -109.491 -11.258 0.036 0.008 2025 5 13 60808 -109.463 -11.700 0.035 0.008 2025 5 14 60809 -109.569 -11.859 0.034 0.008 2025 5 15 60810 -109.655 -11.781 0.032 0.007 2025 5 16 60811 -109.676 -11.642 0.030 0.007 2025 5 17 60812 -109.607 -11.603 0.030 0.007 2025 5 18 60813 -109.476 -11.613 0.031 0.007 2025 5 19 60814 -109.318 -11.594 0.033 0.007 2025 5 20 60815 -109.204 -11.583 0.033 0.008 2025 5 21 60816 -109.254 -11.617 0.039 0.008 2025 5 22 60817 -109.429 -11.616 0.048 0.010 2025 5 23 60818 -109.737 -11.412 0.056 0.012 2025 5 24 60819 -110.244 -11.022 0.054 0.011 2025 5 25 60820 -110.954 -10.737 0.047 0.010 2025 5 26 60821 -111.613 -10.785 0.039 0.009 2025 5 27 60822 -111.926 -11.063 0.033 0.008 2025 5 28 60823 -111.848 -11.341 0.033 0.008 2025 5 29 60824 -111.480 -11.550 0.033 0.008 2025 5 30 60825 -110.937 -11.737 0.034 0.008 2025 5 31 60826 -110.510 -11.839 0.037 0.008 2025 6 1 60827 -110.514 -11.690 0.043 0.010 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 5 2 60797 -0.2886 0.0126 15.04106722891 0.00000000219 2025 5 3 60798 -0.1754 0.0122 15.04106720921 0.00000000212 2025 5 4 60799 -0.0001 0.0121 15.04106717869 0.00000000211 2025 5 5 60800 0.1591 0.0120 15.04106715097 0.00000000209 2025 5 6 60801 0.3215 0.0120 15.04106712270 0.00000000209 2025 5 7 60802 0.3830 0.0115 15.04106711200 0.00000000200 2025 5 8 60803 0.3748 0.0125 15.04106711342 0.00000000218 2025 5 9 60804 0.2971 0.0123 15.04106712695 0.00000000214 2025 5 10 60805 0.2074 0.0125 15.04106714256 0.00000000218 2025 5 11 60806 0.1323 0.0122 15.04106715564 0.00000000212 2025 5 12 60807 -0.0087 0.0118 15.04106718018 0.00000000205 2025 5 13 60808 -0.1558 0.0114 15.04106720579 0.00000000198 2025 5 14 60809 -0.2960 0.0110 15.04106723020 0.00000000191 2025 5 15 60810 -0.4005 0.0110 15.04106724839 0.00000000191 2025 5 16 60811 -0.4342 0.0113 15.04106725426 0.00000000197 2025 5 17 60812 -0.3907 0.0113 15.04106724669 0.00000000197 2025 5 18 60813 -0.2941 0.0123 15.04106722987 0.00000000214 2025 5 19 60814 -0.1411 0.0122 15.04106720323 0.00000000212 2025 5 20 60815 0.0628 0.0122 15.04106716774 0.00000000212 2025 5 21 60816 0.3238 0.0116 15.04106712230 0.00000000202 2025 5 22 60817 0.5649 0.0133 15.04106708033 0.00000000232 2025 5 23 60818 0.7363 0.0136 15.04106705049 0.00000000237 2025 5 24 60819 0.7319 0.0131 15.04106705126 0.00000000228 2025 5 25 60820 0.5562 0.0135 15.04106708184 0.00000000235 2025 5 26 60821 0.2496 0.0134 15.04106713522 0.00000000233 2025 5 27 60822 -0.1446 0.0135 15.04106720384 0.00000000235 2025 5 28 60823 -0.3710 0.0132 15.04106724326 0.00000000230 2025 5 29 60824 -0.4125 0.0128 15.04106725048 0.00000000223 2025 5 30 60825 -0.3479 0.0123 15.04106723923 0.00000000214 2025 5 31 60826 -0.2453 0.0119 15.04106722137 0.00000000207 2025 6 1 60827 -0.1049 0.0120 15.04106719693 0.00000000209 4 - INFORMATION ON TIME SCALES TAI - UTC = 37 s. during period [60797-60827] No leap second introduced during period [60797-60827] 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 bkg2025a.eoxy 54 62 4 - 39 39 10 60797.27 to 60825.27 107 95 17 - 38 44 GSFC gsf2023a.eoxy 58 63 4 11 42 42 11 60797.27 to 60825.27 115 113 17 16 36 54 IAA iaa2021a.eops 105 117 7 - 88 90 10 60797.27 to 60825.27 139 90 14 - 57 67 USNO usn2025a.eoxy 49 56 3 - 51 50 9 60797.27 to 60825.27 72 98 15 - 43 37 OPA opa2024a.eops 120 174 13 - 58 219 9 60797.27 to 60825.27 167 245 19 - 69 340 IVS * ivs2023a.eoxy 78 102 7 - 48 47 9 60797.26 to 60825.27 103 99 14 - 7 8 ASI asi2023a.eoxy 140 176 15 - 127 114 10 60797.27 to 60825.27 176 292 20 - 172 115 VIE vie2023a.eopxy 214 234 12 - - - 19 60797.00 to 60826.00 376 356 30 - - - VIE vie2023a.eoxy - - - - 50 62 10 60797.27 to 60825.27 - - - - 52 117 VLBI Intensive GSI * gsiint2d.eopi - - 7 - - - 7 60805.33 to 60826.33 - - 17 - - - BKG * bkg2023b.eopi - - 6 - - - 60 60797.75 to 60827.00 - - 61 - - - GSFC * gsf2023a.eopi - - 11 - - - 94 60797.75 to 60827.00 - - 31 - - - IAA * iaa2021a.eopi - - 7 - - - 89 60797.75 to 60827.00 - - 32 - - - USNO * usn2025a.eopi - - 10 - - - 86 60797.75 to 60827.00 - - 27 - - - VIE vie2023a.eopi - - 7 - - - 77 60797.75 to 60827.00 - - 86 - - - DGFI dgf2024a.eopi - - 7 - - - 32 60797.75 to 60826.33 - - 93 - - - GPS CODE COD0OPSFIN 3 3 - 0 - - 30 60797.50 to 60826.50 31 24 - 14 - - JPL JPL0OPSFIN 4 4 - 3 - - 30 60797.50 to 60826.50 32 33 - 19 - - GFZ GFZ0OPSFIN 6 6 - 1 - - 30 60797.50 to 60826.50 27 31 - 14 - - ESA ESA0OPSFIN 5 5 - 1 - - 30 60797.50 to 60826.50 26 30 - 13 - - SIO SIO0OPSFIN 24 22 - 9 - - 30 60797.50 to 60826.50 33 36 - 21 - - EMR EMR0OPSRAP 3 2 - 0 - - 30 60797.50 to 60826.50 46 51 - 14 - - IAA gnss.res 0 0 - 0 - - 30 60797.50 to 60826.50 36 43 - 28 - - GRGS GRG0OPSFIN 262 262 - 0 - - 30 60797.50 to 60826.50 24 24 - 13 - - ASI asi*.erp 10 10 - 0 - - 18 60799.50 to 60826.50 18 23 - 40 - - MIT MIT0OPSFIN 10 10 - 1 - - 30 60797.50 to 60826.50 38 39 - 16 - - IGS * IGS0OPSRAP 10 9 - 2 - - 30 60797.50 to 60826.50 23 28 - 14 - - IGS * IGS0OPSFIN 6 6 - 2 - - 30 60797.50 to 60826.50 24 25 - 17 - - SLR MCC tg*.02 210 271 - 33 - - 31 60797.00 to 60827.00 92 157 - 208 - - IAA slr_v.dat 69 87 - 4 - - 27 60797.00 to 60827.00 180 288 - 23 - - ASI asi.*.eop 57 75 - 14 - - 30 60797.50 to 60826.50 155 176 - 57 - - ILRS * ilrsa.eop 36 45 - 7 - - 30 60797.50 to 60826.50 109 136 - 24 - - BULLETIN A NEOS mark3.out 16 12 14 - - - 31 60797.00 to 60827.00 36 39 16 - - - To unsubscribe : http://hpiers.obspm.fr/eop-pc/products/bulletins/bulletin_registration.html