BULLETIN B 447 1 May 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 0.050 0.041 0.0200 0.068 0.060 2025 3 2 60736 69.649 327.426 44.7529 0.393 -0.321 0.053 0.042 0.0303 0.091 0.168 2025 3 3 60737 68.948 328.431 43.9219 0.412 -0.221 0.053 0.041 0.0278 0.075 0.115 2025 3 4 60738 68.457 329.660 43.3464 0.438 -0.132 0.050 0.041 0.0293 0.065 0.078 2025 3 5 60739 67.826 331.186 43.1191 0.478 -0.124 0.048 0.041 0.0351 0.076 0.078 2025 3 6 60740 66.979 332.743 43.1635 0.517 -0.148 0.047 0.041 0.0422 0.096 0.087 2025 3 7 60741 66.118 334.100 43.3827 0.543 -0.178 0.048 0.041 0.0439 0.115 0.095 2025 3 8 60742 65.389 335.493 43.6977 0.505 -0.171 0.049 0.043 0.0370 0.116 0.094 2025 3 9 60743 64.856 336.821 44.0434 0.435 -0.143 0.048 0.042 0.0295 0.110 0.089 2025 3 10 60744 64.557 338.397 44.2633 0.370 -0.114 0.048 0.041 0.0269 0.103 0.083 2025 3 11 60745 64.351 340.302 44.3209 0.329 -0.092 0.048 0.041 0.0257 0.098 0.079 2025 3 12 60746 63.650 342.420 44.1921 0.398 -0.109 0.048 0.042 0.0225 0.094 0.075 2025 3 13 60747 63.159 344.411 43.8780 0.504 -0.139 0.048 0.041 0.0194 0.088 0.068 2025 3 14 60748 62.316 346.812 43.4146 0.603 -0.168 0.051 0.041 0.0173 0.082 0.062 2025 3 15 60749 61.222 348.446 42.8855 0.595 -0.170 0.050 0.040 0.0146 0.077 0.057 2025 3 16 60750 60.490 350.261 42.3757 0.526 -0.154 0.051 0.040 0.0123 0.068 0.051 2025 3 17 60751 60.397 352.108 41.9727 0.448 -0.128 0.051 0.040 0.0113 0.058 0.045 2025 3 18 60752 60.441 353.809 41.7016 0.387 -0.095 0.050 0.040 0.0112 0.050 0.040 2025 3 19 60753 60.360 355.442 41.5535 0.436 -0.050 0.048 0.039 0.0119 0.051 0.041 2025 3 20 60754 60.101 357.204 41.5528 0.522 -0.008 0.048 0.041 0.0127 0.055 0.042 2025 3 21 60755 59.353 358.802 41.6603 0.603 0.020 0.048 0.041 0.0132 0.059 0.044 2025 3 22 60756 58.693 359.998 41.8560 0.600 -0.009 0.048 0.041 0.0124 0.057 0.043 2025 3 23 60757 57.702 361.695 42.0942 0.545 -0.072 0.051 0.042 0.0113 0.052 0.040 2025 3 24 60758 57.277 362.832 42.2469 0.475 -0.142 0.056 0.044 0.0116 0.047 0.037 2025 3 25 60759 57.692 364.014 42.2111 0.408 -0.206 0.055 0.044 0.0129 0.043 0.036 2025 3 26 60760 57.864 365.575 41.9380 0.392 -0.226 0.052 0.044 0.0150 0.041 0.034 2025 3 27 60761 57.966 367.335 41.3737 0.399 -0.222 0.052 0.044 0.0162 0.040 0.033 2025 3 28 60762 57.950 369.251 40.5151 0.414 -0.206 0.053 0.043 0.0150 0.039 0.031 2025 3 29 60763 57.920 371.020 39.4413 0.425 -0.179 0.054 0.043 0.0137 0.039 0.031 2025 3 30 60764 58.193 372.717 38.3609 0.434 -0.144 0.057 0.042 0.0131 0.041 0.032 2025 3 31 60765 58.466 374.485 37.4941 0.440 -0.108 0.058 0.042 0.0138 0.043 0.032 2025 4 1 60766 58.287 376.315 36.9317 0.441 -0.074 0.057 0.041 0.0105 0.044 0.033 Preliminary extension 2025 4 2 60767 58.402 377.578 36.7033 0.429 -0.048 0.052 0.039 0.0118 0.048 0.035 2025 4 3 60768 58.942 378.940 36.7807 0.412 -0.030 0.049 0.037 0.0132 0.054 0.040 2025 4 4 60769 59.711 380.975 37.0311 0.396 -0.020 0.046 0.036 0.0142 0.059 0.044 2025 4 5 60770 60.886 382.874 37.2725 0.395 -0.032 0.044 0.036 0.0123 0.060 0.045 2025 4 6 60771 62.234 384.483 37.3601 0.403 -0.056 0.042 0.035 0.0101 0.058 0.046 2025 4 7 60772 63.185 386.311 37.2539 0.411 -0.083 0.041 0.035 0.0097 0.057 0.047 2025 4 8 60773 63.716 387.923 36.9636 0.418 -0.107 0.041 0.035 0.0103 0.056 0.047 2025 4 9 60774 64.665 388.989 36.4705 0.411 -0.113 0.041 0.035 0.0103 0.056 0.047 2025 4 10 60775 65.759 390.304 35.8515 0.398 -0.110 0.041 0.035 0.0103 0.057 0.047 2025 4 11 60776 66.798 391.998 35.1963 0.384 -0.100 0.042 0.036 0.0106 0.058 0.046 2025 4 12 60777 67.378 393.857 34.5595 0.453 -0.081 0.044 0.036 0.0105 0.060 0.047 2025 4 13 60778 67.902 395.338 34.0064 0.529 -0.059 0.046 0.037 0.0094 0.063 0.049 2025 4 14 60779 68.616 396.371 33.5925 0.531 -0.036 0.050 0.039 0.0100 0.066 0.051 2025 4 15 60780 69.112 397.410 33.3539 0.403 -0.016 0.052 0.041 0.0121 0.067 0.052 2025 4 16 60781 69.757 398.452 33.3043 0.277 -0.129 0.053 0.043 0.0146 0.500 0.500 2025 4 17 60782 70.381 399.473 33.4569 0.284 -0.132 0.055 0.043 0.0170 0.500 0.500 2025 4 18 60783 71.205 400.628 33.7374 0.292 -0.138 0.056 0.044 0.0147 0.500 0.500 2025 4 19 60784 72.122 402.178 34.0201 0.300 -0.146 0.056 0.045 0.0127 0.500 0.500 2025 4 20 60785 73.015 404.034 34.2669 0.307 -0.156 0.056 0.046 0.0118 0.500 0.500 2025 4 21 60786 74.494 405.365 34.4058 0.311 -0.167 0.056 0.046 0.0113 0.500 0.500 2025 4 22 60787 75.952 406.507 34.3393 0.308 -0.177 0.057 0.047 0.0103 0.500 0.500 2025 4 23 60788 77.210 407.435 34.0365 0.298 -0.183 0.058 0.048 0.0094 0.500 0.500 2025 4 24 60789 78.662 408.530 33.4595 0.281 -0.186 0.060 0.050 0.0097 0.500 0.500 2025 4 25 60790 80.221 409.970 32.6112 0.259 -0.183 0.064 0.054 0.0105 0.500 0.500 2025 4 26 60791 81.626 411.521 31.6296 0.236 -0.177 0.071 0.059 0.0118 0.500 0.500 2025 4 27 60792 82.624 413.097 30.7220 0.219 -0.166 0.080 0.068 0.0150 0.500 0.500 2025 4 28 60793 83.367 414.209 30.0403 0.211 -0.155 0.093 0.082 0.0224 0.500 0.500 2025 4 29 60794 84.057 415.146 29.6479 0.211 -0.144 0.114 0.103 0.0362 0.500 0.500 2025 4 30 60795 84.741 415.971 29.5662 0.219 -0.136 0.144 0.134 0.0569 0.500 0.500 2025 5 1 60796 85.345 417.178 29.7174 0.231 -0.131 0.186 0.174 0.0805 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 3 2 60736 -111.372 -8.181 0.228 0.168 2025 3 3 60737 -111.892 -8.198 0.190 0.115 2025 3 4 60738 -112.304 -8.383 0.162 0.078 2025 3 5 60739 -112.385 -8.640 0.190 0.078 2025 3 6 60740 -112.200 -8.888 0.242 0.087 2025 3 7 60741 -111.883 -9.127 0.289 0.095 2025 3 8 60742 -111.640 -9.303 0.291 0.094 2025 3 9 60743 -111.415 -9.408 0.276 0.089 2025 3 10 60744 -111.151 -9.463 0.259 0.083 2025 3 11 60745 -110.890 -9.459 0.247 0.079 2025 3 12 60746 -110.506 -9.369 0.236 0.075 2025 3 13 60747 -110.161 -9.151 0.221 0.068 2025 3 14 60748 -109.849 -8.894 0.207 0.062 2025 3 15 60749 -109.770 -8.759 0.194 0.057 2025 3 16 60750 -109.885 -8.836 0.170 0.051 2025 3 17 60751 -110.122 -9.037 0.145 0.045 2025 3 18 60752 -110.365 -9.210 0.126 0.040 2025 3 19 60753 -110.292 -9.329 0.129 0.041 2025 3 20 60754 -110.047 -9.521 0.139 0.042 2025 3 21 60755 -109.719 -9.833 0.148 0.044 2025 3 22 60756 -109.457 -10.158 0.144 0.043 2025 3 23 60757 -109.239 -10.293 0.131 0.040 2025 3 24 60758 -109.234 -10.274 0.118 0.037 2025 3 25 60759 -109.589 -10.350 0.108 0.036 2025 3 26 60760 -109.928 -10.579 0.104 0.034 2025 3 27 60761 -109.879 -10.698 0.101 0.033 2025 3 28 60762 -109.496 -10.389 0.098 0.031 2025 3 29 60763 -109.344 -9.767 0.099 0.031 2025 3 30 60764 -109.775 -9.308 0.103 0.032 2025 3 31 60765 -110.524 -9.304 0.107 0.032 2025 4 1 60766 -111.091 -9.620 0.110 0.033 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 3 2 60736 0.8855 0.0243 15.04106702452 0.00000000423 2025 3 3 60737 0.7282 0.0261 15.04106705190 0.00000000454 2025 3 4 60738 0.4083 0.0259 15.04106710759 0.00000000451 2025 3 5 60739 0.0708 0.0268 15.04106716634 0.00000000467 2025 3 6 60740 -0.1530 0.0295 15.04106720531 0.00000000514 2025 3 7 60741 -0.2867 0.0325 15.04106722858 0.00000000566 2025 3 8 60742 -0.3607 0.0295 15.04106724146 0.00000000514 2025 3 9 60743 -0.2941 0.0381 15.04106722987 0.00000000663 2025 3 10 60744 -0.1417 0.0363 15.04106720334 0.00000000632 2025 3 11 60745 0.0332 0.0403 15.04106717289 0.00000000702 2025 3 12 60746 0.2253 0.0346 15.04106713945 0.00000000602 2025 3 13 60747 0.3984 0.0289 15.04106710931 0.00000000503 2025 3 14 60748 0.5115 0.0260 15.04106708963 0.00000000453 2025 3 15 60749 0.5329 0.0242 15.04106708590 0.00000000421 2025 3 16 60750 0.4697 0.0233 15.04106709690 0.00000000406 2025 3 17 60751 0.3391 0.0230 15.04106711964 0.00000000400 2025 3 18 60752 0.2077 0.0226 15.04106714251 0.00000000393 2025 3 19 60753 0.0757 0.0222 15.04106716549 0.00000000386 2025 3 20 60754 -0.0628 0.0226 15.04106718960 0.00000000393 2025 3 21 60755 -0.1572 0.0224 15.04106720604 0.00000000390 2025 3 22 60756 -0.2275 0.0232 15.04106721827 0.00000000404 2025 3 23 60757 -0.2185 0.0232 15.04106721671 0.00000000404 2025 3 24 60758 -0.0760 0.0239 15.04106719190 0.00000000416 2025 3 25 60759 0.1493 0.0241 15.04106715268 0.00000000420 2025 3 26 60760 0.4156 0.0249 15.04106710632 0.00000000433 2025 3 27 60761 0.7177 0.0256 15.04106705373 0.00000000446 2025 3 28 60762 0.9870 0.0268 15.04106700685 0.00000000467 2025 3 29 60763 1.1164 0.0289 15.04106698432 0.00000000503 2025 3 30 60764 1.0076 0.0293 15.04106700326 0.00000000510 2025 3 31 60765 0.7219 0.0300 15.04106705300 0.00000000522 2025 4 1 60766 0.3905 0.0308 15.04106711069 0.00000000536 4 - INFORMATION ON TIME SCALES TAI - UTC = 37 s. during period [60736-60766] No leap second introduced during period [60736-60766] 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 bkg2023b.eoxy 45 51 2 - 37 35 9 60738.21 to 60762.27 93 120 38 - 18 42 GSFC gsf2023a.eoxy 54 57 3 8 42 37 11 60738.21 to 60762.27 117 148 40 13 32 60 IAA iaa2021a.eops 87 90 5 - 81 79 11 60738.21 to 60762.27 131 143 30 - 88 69 USNO usn2024b.eoxy 46 46 2 - 48 45 8 60738.21 to 60762.27 113 91 32 - 16 20 OPA opa2024a.eops 53 106 18 - 86 224 1 60752.21 to 60752.21 0 0 0 - 0 0 IVS * ivs2023a.eoxy 61 84 5 - 42 38 8 60738.21 to 60762.27 106 91 35 - 11 8 ASI asi2024a.eoxy 130 137 15 - 217 140 3 60738.21 to 60745.21 298 68 28 - 37 98 VIE vie2023a.eopxy 191 221 12 - - - 17 60738.00 to 60766.00 349 717 16 - - - VIE vie2023a.eoxy - - - - 40 39 9 60738.21 to 60762.27 - - - - 60 49 VLBI Intensive GSI * gsiint2d.eopi - - 7 - - - 9 60736.33 to 60764.33 - - 12 - - - BKG * bkg2023b.eopi - - 6 - - - 82 60736.25 to 60765.75 - - 27 - - - GSFC * gsf2023a.eopi - - 12 - - - 119 60736.25 to 60765.75 - - 23 - - - IAA * iaa2021a.eopi - - 8 - - - 115 60736.25 to 60765.75 - - 25 - - - USNO * usn2024b.eopi - - 11 - - - 79 60736.25 to 60765.75 - - 28 - - - VIE vie2023a.eopi - - 7 - - - 86 60736.25 to 60765.75 - - 32 - - - DGFI dgf2024a.eopi - - 8 - - - 38 60736.33 to 60765.75 - - 45 - - - GPS CODE COD0OPSFIN 3 3 - 0 - - 30 60736.50 to 60765.50 29 22 - 14 - - JPL JPL0OPSFIN 5 5 - 4 - - 30 60736.50 to 60765.50 40 29 - 22 - - GFZ GFZ0OPSFIN 5 4 - 1 - - 30 60736.50 to 60765.50 34 29 - 16 - - ESA ESA0OPSFIN 4 5 - 1 - - 30 60736.50 to 60765.50 32 29 - 14 - - SIO SIO0OPSFIN 24 23 - 11 - - 30 60736.50 to 60765.50 45 34 - 29 - - EMR EMR0OPSRAP 3 3 - 1 - - 30 60736.50 to 60765.50 37 42 - 16 - - IAA gnss.res 0 0 - 0 - - 30 60736.50 to 60765.50 67 56 - 36 - - GRGS GRG0OPSFIN 265 265 - 0 - - 30 60736.50 to 60765.50 27 26 - 17 - - ASI asi*.erp 10 10 - 0 - - 21 60736.50 to 60765.50 18 21 - 66 - - MIT MIT0OPSFIN 10 10 - 1 - - 30 60736.50 to 60765.50 49 36 - 23 - - IGS * IGS0OPSRAP 9 10 - 3 - - 30 60736.50 to 60765.50 31 25 - 15 - - IGS * IGS0OPSFIN 6 7 - 2 - - 30 60736.50 to 60765.50 23 25 - 13 - - SLR MCC tg*.02 281 324 - 34 - - 31 60736.00 to 60766.00 189 313 - 143 - - IAA slr_v.dat 88 99 - 6 - - 29 60736.00 to 60765.00 262 311 - 18 - - ASI asi.*.eop 71 80 - 18 - - 30 60736.50 to 60765.50 167 245 - 76 - - ILRS * ilrsa.eop 53 51 - 10 - - 30 60736.50 to 60765.50 171 114 - 31 - - BULLETIN A NEOS mark3.out 15 14 12 - - - 31 60736.00 to 60766.00 33 38 16 - - - To unsubscribe : http://hpiers.obspm.fr/eop-pc/products/bulletins/bulletin_registration.html