BULLETIN B 445 1 March 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 0.054 0.040 0.0185 0.079 0.078 2025 1 2 60677 142.938 304.989 46.4717 0.300 -0.316 0.051 0.043 0.1154 0.164 0.184 2025 1 3 60678 142.301 304.928 46.3402 0.289 -0.277 0.053 0.043 0.0636 0.149 0.166 2025 1 4 60679 141.397 305.439 45.9225 0.277 -0.236 0.053 0.042 0.0402 0.127 0.137 2025 1 5 60680 140.267 305.279 45.2676 0.266 -0.197 0.053 0.042 0.0293 0.105 0.108 2025 1 6 60681 139.644 305.280 44.4495 0.258 -0.169 0.053 0.042 0.0248 0.090 0.089 2025 1 7 60682 138.555 305.611 43.6306 0.256 -0.156 0.053 0.044 0.0194 0.083 0.081 2025 1 8 60683 137.046 305.476 42.9511 0.262 -0.166 0.053 0.043 0.0145 0.080 0.077 2025 1 9 60684 135.207 305.409 42.5459 0.280 -0.233 0.053 0.041 0.0108 0.107 0.103 2025 1 10 60685 133.157 305.284 42.4751 0.306 -0.295 0.053 0.041 0.0082 0.140 0.135 2025 1 11 60686 130.840 305.010 42.6685 0.343 -0.306 0.053 0.042 0.0065 0.138 0.133 2025 1 12 60687 128.911 304.679 43.0493 0.388 -0.273 0.052 0.042 0.0057 0.116 0.111 2025 1 13 60688 126.896 304.065 43.5456 0.436 -0.215 0.051 0.043 0.0055 0.088 0.082 2025 1 14 60689 124.484 303.277 44.0109 0.485 -0.140 0.051 0.041 0.0057 0.065 0.059 2025 1 15 60690 122.735 302.798 44.3820 0.514 -0.099 0.052 0.039 0.0091 0.061 0.055 2025 1 16 60691 121.685 302.452 44.5772 0.531 -0.073 0.053 0.039 0.0070 0.060 0.054 2025 1 17 60692 120.740 302.518 44.6077 0.542 -0.055 0.054 0.040 0.0059 0.058 0.052 2025 1 18 60693 119.973 302.314 44.5088 0.547 -0.044 0.055 0.040 0.0053 0.055 0.049 2025 1 19 60694 120.058 302.553 44.3556 0.546 -0.040 0.056 0.039 0.0052 0.052 0.046 2025 1 20 60695 120.602 303.138 44.2056 0.542 -0.043 0.057 0.040 0.0062 0.051 0.045 2025 1 21 60696 121.080 303.650 44.1204 0.534 -0.053 0.060 0.041 0.0084 0.050 0.044 2025 1 22 60697 120.668 304.121 44.1669 0.525 -0.077 0.064 0.041 0.0100 0.051 0.045 2025 1 23 60698 119.805 304.336 44.3887 0.514 -0.105 0.060 0.040 0.0114 0.053 0.047 2025 1 24 60699 118.348 304.722 44.8350 0.500 -0.131 0.061 0.042 0.0132 0.055 0.048 2025 1 25 60700 116.027 305.091 45.4814 0.483 -0.146 0.058 0.041 0.0132 0.055 0.048 2025 1 26 60701 113.846 305.627 46.2143 0.463 -0.152 0.056 0.041 0.0119 0.054 0.048 2025 1 27 60702 111.759 306.088 46.9473 0.443 -0.153 0.055 0.040 0.0127 0.053 0.048 2025 1 28 60703 109.752 306.378 47.5603 0.425 -0.150 0.054 0.039 0.0170 0.052 0.048 2025 1 29 60704 107.955 306.980 47.9445 0.418 -0.151 0.053 0.038 0.0208 0.057 0.057 2025 1 30 60705 106.637 307.612 48.0782 0.413 -0.146 0.052 0.038 0.0208 0.064 0.071 2025 1 31 60706 105.504 308.183 47.9094 0.406 -0.130 0.049 0.036 0.0228 0.070 0.084 2025 2 1 60707 103.901 308.793 47.4539 0.378 -0.067 0.046 0.035 0.0234 0.073 0.089 Preliminary extension 2025 2 2 60708 101.827 308.808 46.8462 0.342 0.017 0.044 0.034 0.0259 0.075 0.094 2025 2 3 60709 99.720 309.168 46.2250 0.313 0.095 0.043 0.034 0.0326 0.078 0.099 2025 2 4 60710 97.350 309.477 45.7053 0.298 0.153 0.042 0.034 0.0433 0.080 0.103 2025 2 5 60711 95.061 309.785 45.4181 0.334 0.133 0.042 0.035 0.0560 0.082 0.104 2025 2 6 60712 92.387 309.895 45.4425 0.389 0.078 0.042 0.035 0.0607 0.085 0.106 2025 2 7 60713 89.775 310.109 45.7295 0.445 0.012 0.043 0.035 0.0491 0.087 0.107 2025 2 8 60714 87.068 310.417 46.1671 0.570 -0.071 0.043 0.035 0.0382 0.096 0.117 2025 2 9 60715 85.204 310.384 46.6204 0.679 -0.143 0.043 0.035 0.0305 0.111 0.134 2025 2 10 60716 84.500 310.953 46.9585 0.683 -0.176 0.043 0.035 0.0273 0.122 0.148 2025 2 11 60717 83.767 311.646 47.1584 0.517 -0.148 0.043 0.035 0.0253 0.129 0.155 2025 2 12 60718 83.226 312.323 47.1935 0.316 -0.180 0.043 0.034 0.0254 0.500 0.500 2025 2 13 60719 82.839 313.021 47.0491 0.313 -0.177 0.043 0.035 0.0237 0.500 0.500 2025 2 14 60720 82.641 314.019 46.7310 0.307 -0.173 0.044 0.035 0.0212 0.500 0.500 2025 2 15 60721 82.358 314.881 46.3030 0.301 -0.167 0.044 0.037 0.0173 0.500 0.500 2025 2 16 60722 81.695 315.722 45.9091 0.297 -0.160 0.045 0.039 0.0145 0.500 0.500 2025 2 17 60723 81.049 317.047 45.6045 0.293 -0.154 0.048 0.040 0.0140 0.500 0.500 2025 2 18 60724 79.824 318.117 45.4370 0.291 -0.149 0.050 0.042 0.0148 0.500 0.500 2025 2 19 60725 78.624 318.815 45.4546 0.290 -0.147 0.052 0.043 0.0159 0.500 0.500 2025 2 20 60726 77.231 319.541 45.6248 0.290 -0.149 0.054 0.045 0.0166 0.500 0.500 2025 2 21 60727 75.613 320.430 45.9113 0.292 -0.155 0.056 0.046 0.0171 0.500 0.500 2025 2 22 60728 74.312 321.371 46.3115 0.297 -0.165 0.057 0.048 0.0175 0.500 0.500 2025 2 23 60729 72.687 321.792 46.7639 0.304 -0.177 0.060 0.050 0.0181 0.500 0.500 2025 2 24 60730 71.507 322.228 47.1633 0.310 -0.190 0.064 0.053 0.0210 0.500 0.500 2025 2 25 60731 70.403 322.923 47.3987 0.312 -0.201 0.072 0.059 0.0260 0.500 0.500 2025 2 26 60732 69.936 323.398 47.3882 0.307 -0.209 0.083 0.068 0.0315 0.500 0.500 2025 2 27 60733 70.315 324.130 47.0769 0.294 -0.211 0.100 0.080 0.0340 0.500 0.500 2025 2 28 60734 70.403 325.017 46.4682 0.276 -0.208 0.123 0.097 0.0360 0.500 0.500 2025 3 1 60735 70.203 325.801 45.6184 0.256 -0.199 0.163 0.127 0.0398 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 1 2 60677 -112.653 -6.657 0.411 0.184 2025 1 3 60678 -112.461 -6.587 0.375 0.166 2025 1 4 60679 -112.402 -6.570 0.319 0.137 2025 1 5 60680 -112.476 -6.549 0.263 0.108 2025 1 6 60681 -112.660 -6.473 0.226 0.089 2025 1 7 60682 -112.916 -6.338 0.209 0.081 2025 1 8 60683 -113.181 -6.200 0.202 0.077 2025 1 9 60684 -113.353 -6.176 0.268 0.103 2025 1 10 60685 -113.360 -6.269 0.353 0.135 2025 1 11 60686 -113.151 -6.430 0.347 0.133 2025 1 12 60687 -112.763 -6.597 0.291 0.111 2025 1 13 60688 -112.289 -6.696 0.220 0.082 2025 1 14 60689 -111.817 -6.662 0.163 0.059 2025 1 15 60690 -111.442 -6.522 0.153 0.055 2025 1 16 60691 -111.172 -6.311 0.151 0.054 2025 1 17 60692 -111.041 -6.127 0.145 0.052 2025 1 18 60693 -111.093 -6.064 0.138 0.049 2025 1 19 60694 -111.314 -6.126 0.131 0.046 2025 1 20 60695 -111.619 -6.225 0.128 0.045 2025 1 21 60696 -111.906 -6.280 0.126 0.044 2025 1 22 60697 -112.109 -6.321 0.129 0.045 2025 1 23 60698 -112.219 -6.439 0.134 0.047 2025 1 24 60699 -112.235 -6.680 0.138 0.048 2025 1 25 60700 -112.185 -6.970 0.137 0.048 2025 1 26 60701 -112.149 -7.194 0.135 0.048 2025 1 27 60702 -112.216 -7.297 0.133 0.048 2025 1 28 60703 -112.358 -7.309 0.131 0.048 2025 1 29 60704 -112.399 -7.264 0.142 0.057 2025 1 30 60705 -112.249 -7.146 0.161 0.071 2025 1 31 60706 -112.033 -6.967 0.177 0.084 2025 2 1 60707 -112.043 -6.776 0.183 0.089 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 1 2 60677 -0.0296 0.0248 15.04106718382 0.00000000432 2025 1 3 60678 0.2763 0.0261 15.04106713057 0.00000000454 2025 1 4 60679 0.5468 0.0260 15.04106708348 0.00000000453 2025 1 5 60680 0.7499 0.0254 15.04106704812 0.00000000442 2025 1 6 60681 0.8447 0.0264 15.04106703162 0.00000000460 2025 1 7 60682 0.7701 0.0267 15.04106704461 0.00000000465 2025 1 8 60683 0.5579 0.0268 15.04106708155 0.00000000467 2025 1 9 60684 0.2372 0.0267 15.04106713738 0.00000000465 2025 1 10 60685 -0.0742 0.0380 15.04106719159 0.00000000662 2025 1 11 60686 -0.3055 0.0381 15.04106723185 0.00000000663 2025 1 12 60687 -0.4551 0.0387 15.04106725790 0.00000000674 2025 1 13 60688 -0.5042 0.0339 15.04106726644 0.00000000590 2025 1 14 60689 -0.4211 0.0285 15.04106725198 0.00000000496 2025 1 15 60690 -0.2915 0.0261 15.04106722942 0.00000000454 2025 1 16 60691 -0.1137 0.0251 15.04106719846 0.00000000437 2025 1 17 60692 0.0426 0.0249 15.04106717125 0.00000000433 2025 1 18 60693 0.1383 0.0249 15.04106715459 0.00000000433 2025 1 19 60694 0.1599 0.0256 15.04106715083 0.00000000446 2025 1 20 60695 0.1288 0.0263 15.04106715625 0.00000000458 2025 1 21 60696 0.0297 0.0282 15.04106717350 0.00000000491 2025 1 22 60697 -0.1297 0.0335 15.04106720125 0.00000000583 2025 1 23 60698 -0.3275 0.0340 15.04106723568 0.00000000592 2025 1 24 60699 -0.5526 0.0373 15.04106727487 0.00000000649 2025 1 25 60700 -0.7122 0.0377 15.04106730265 0.00000000656 2025 1 26 60701 -0.7511 0.0343 15.04106730943 0.00000000597 2025 1 27 60702 -0.6960 0.0312 15.04106729983 0.00000000543 2025 1 28 60703 -0.5160 0.0286 15.04106726850 0.00000000498 2025 1 29 60704 -0.2567 0.0265 15.04106722336 0.00000000461 2025 1 30 60705 0.0161 0.0259 15.04106717587 0.00000000451 2025 1 31 60706 0.3213 0.0241 15.04106712274 0.00000000420 2025 2 1 60707 0.5592 0.0230 15.04106708132 0.00000000400 4 - INFORMATION ON TIME SCALES TAI - UTC = 37 s. during period [60677-60707] No leap second introduced during period [60677-60707] 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 GSFC gsf2023a.eoxy 64 56 4 12 42 43 9 60683.21 to 60706.27 167 64 24 21 70 44 USNO usn2024b.eoxy 62 51 3 - 50 51 8 60683.21 to 60706.27 107 103 25 - 69 48 OPA opa2024a.eops 112 148 12 - 115 212 6 60682.19 to 60703.21 420 382 50 - 171 234 IVS * ivs2023a.eoxy 93 77 4 - 45 48 6 60683.19 to 60703.21 78 177 22 - 2 3 ASI asi2023a.eoxy 123 127 12 - 236 131 7 60682.19 to 60703.21 212 155 27 - 100 113 VIE vie2023a.eopxy 268 220 19 - - - 16 60682.00 to 60707.00 645 286 37 - - - VIE vie2023a.eoxy - - - - 55 61 9 60682.19 to 60706.27 - - - - 73 41 VLBI Intensive GSI * gsiint2d.eopi - - 4 - - - 8 60679.33 to 60701.33 - - 24 - - - BKG * bkg2023b.eopi - - 5 - - - 66 60677.75 to 60706.75 - - 46 - - - GSFC * gsf2023a.eopi - - 10 - - - 89 60677.69 to 60706.75 - - 41 - - - IAA * iaa2021a.eopi - - 7 - - - 61 60677.75 to 60702.75 - - 193 - - - USNO * usn2024b.eopi - - 10 - - - 72 60677.69 to 60706.75 - - 32 - - - VIE vie2023a.eopi - - 6 - - - 73 60677.75 to 60706.75 - - 53 - - - DGFI dgf2024a.eopi - - 7 - - - 32 60677.75 to 60706.75 - - 43 - - - GPS CODE COD0OPSFIN 3 3 - 0 - - 30 60677.50 to 60706.50 50 24 - 14 - - JPL JPL0OPSFIN 5 5 - 3 - - 30 60677.50 to 60706.50 68 30 - 19 - - GFZ GFZ0OPSFIN 5 5 - 1 - - 30 60677.50 to 60706.50 43 31 - 15 - - ESA ESA0OPSFIN 5 6 - 2 - - 30 60677.50 to 60706.50 47 23 - 14 - - SIO SIO0OPSFIN 24 23 - 10 - - 30 60677.50 to 60706.50 65 33 - 18 - - EMR EMR0OPSRAP 3 3 - 0 - - 30 60677.50 to 60706.50 55 39 - 14 - - IAA gnss.res 0 0 - 0 - - 29 60677.50 to 60706.50 60 80 - 45 - - GRGS GRG0OPSFIN 258 258 - 0 - - 30 60677.50 to 60706.50 45 34 - 14 - - ASI asi*.erp 10 9 - 0 - - 18 60677.50 to 60706.50 26 20 - 84 - - MIT MIT0OPSFIN 10 9 - 1 - - 30 60677.50 to 60706.50 72 33 - 17 - - IGS * IGS0OPSRAP 13 10 - 3 - - 30 60677.50 to 60706.50 56 23 - 12 - - IGS * IGS0OPSFIN 8 6 - 2 - - 30 60677.50 to 60706.50 40 21 - 13 - - SLR MCC tg*.02 578 571 - 62 - - 31 60677.00 to 60707.00 201 174 - 64 - - IAA slr_v.dat 81 87 - 5 - - 31 60677.00 to 60707.00 287 281 - 23 - - ASI asi.*.eop 59 64 - 17 - - 30 60677.50 to 60706.50 176 183 - 84 - - ILRS * ilrsa.eop 46 48 - 10 - - 30 60677.50 to 60706.50 149 151 - 31 - - BULLETIN A NEOS mark3.out 15 16 12 - - - 31 60677.00 to 60707.00 29 50 16 - - - To unsubscribe : http://hpiers.obspm.fr/eop-pc/products/bulletins/bulletin_registration.html