BULLETIN B 448 1 June 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 0.036 0.029 0.0240 0.079 0.038 2025 4 2 60767 58.445 377.563 36.7119 0.429 -0.052 0.041 0.029 0.0216 0.012 0.007 2025 4 3 60768 58.952 378.953 36.7939 0.412 -0.034 0.040 0.029 0.0225 0.013 0.007 2025 4 4 60769 59.746 380.968 37.0448 0.396 -0.024 0.042 0.029 0.0226 0.013 0.007 2025 4 5 60770 60.917 382.875 37.2828 0.395 -0.036 0.040 0.029 0.0228 0.013 0.007 2025 4 6 60771 62.263 384.476 37.3648 0.402 -0.060 0.039 0.030 0.0231 0.013 0.007 2025 4 7 60772 63.204 386.318 37.2529 0.411 -0.087 0.038 0.030 0.0227 0.013 0.007 2025 4 8 60773 63.746 387.918 36.9578 0.417 -0.111 0.037 0.031 0.0219 0.013 0.008 2025 4 9 60774 64.675 388.990 36.4610 0.410 -0.117 0.037 0.030 0.0219 0.013 0.008 2025 4 10 60775 65.792 390.300 35.8458 0.397 -0.113 0.036 0.031 0.0219 0.013 0.007 2025 4 11 60776 66.820 391.997 35.1952 0.383 -0.103 0.035 0.030 0.0213 0.013 0.007 2025 4 12 60777 67.417 393.857 34.5568 0.366 -0.068 0.035 0.030 0.0213 0.013 0.008 2025 4 13 60778 67.929 395.335 33.9930 0.352 -0.028 0.035 0.030 0.0218 0.013 0.008 2025 4 14 60779 68.656 396.367 33.5673 0.346 -0.004 0.035 0.029 0.0220 0.014 0.008 2025 4 15 60780 69.132 397.412 33.3342 0.351 -0.010 0.035 0.029 0.0225 0.014 0.008 2025 4 16 60781 69.796 398.435 33.2913 0.380 -0.085 0.036 0.028 0.0242 0.017 0.009 2025 4 17 60782 70.410 399.477 33.4457 0.419 -0.185 0.035 0.029 0.0271 0.020 0.011 2025 4 18 60783 71.240 400.613 33.7248 0.445 -0.259 0.036 0.029 0.0299 0.021 0.011 2025 4 19 60784 72.180 402.176 34.0128 0.458 -0.302 0.035 0.030 0.0327 0.021 0.011 2025 4 20 60785 73.040 404.039 34.2701 0.463 -0.322 0.036 0.029 0.0291 0.022 0.012 2025 4 21 60786 74.542 405.355 34.4206 0.462 -0.320 0.035 0.030 0.0277 0.023 0.012 2025 4 22 60787 75.981 406.504 34.3595 0.454 -0.297 0.034 0.030 0.0242 0.024 0.012 2025 4 23 60788 77.241 407.410 34.0518 0.443 -0.253 0.034 0.030 0.0214 0.024 0.013 2025 4 24 60789 78.665 408.519 33.4709 0.434 -0.174 0.035 0.031 0.0199 0.032 0.016 2025 4 25 60790 80.265 409.980 32.6255 0.416 -0.097 0.035 0.030 0.0199 0.043 0.021 2025 4 26 60791 81.633 411.508 31.6430 0.359 -0.071 0.038 0.031 0.0207 0.074 0.035 2025 4 27 60792 82.673 413.108 30.7293 0.276 -0.087 0.040 0.029 0.0220 0.134 0.063 2025 4 28 60793 83.376 414.233 30.0424 0.191 -0.123 0.039 0.029 0.0237 0.205 0.096 2025 4 29 60794 84.129 415.089 29.6527 0.119 -0.166 0.037 0.028 0.0261 0.257 0.121 2025 4 30 60795 84.697 416.098 29.5953 0.106 -0.181 0.039 0.028 0.0293 0.470 0.219 2025 5 1 60796 85.453 416.866 29.7755 0.125 -0.187 0.041 0.028 0.0328 0.812 0.376 Preliminary extension 2025 5 2 60797 86.539 418.002 30.0650 0.166 -0.188 0.041 0.028 0.0334 1.116 0.516 2025 5 3 60798 87.343 419.121 30.3074 0.229 -0.182 0.036 0.026 0.0289 1.078 0.495 2025 5 4 60799 88.202 420.170 30.3897 0.306 -0.173 0.033 0.025 0.0254 0.877 0.397 2025 5 5 60800 88.860 421.210 30.3140 0.386 -0.168 0.031 0.024 0.0229 0.664 0.293 2025 5 6 60801 89.749 422.098 30.0588 0.461 -0.171 0.030 0.024 0.0206 0.518 0.221 2025 5 7 60802 90.678 423.204 29.7044 0.517 -0.190 0.029 0.023 0.0191 0.698 0.290 2025 5 8 60803 91.486 423.787 29.3260 0.559 -0.217 0.029 0.023 0.0182 0.977 0.400 2025 5 9 60804 92.524 424.363 28.9923 0.578 -0.253 0.029 0.023 0.0179 0.967 0.402 2025 5 10 60805 93.879 424.739 28.7487 0.577 -0.292 0.029 0.022 0.0179 0.787 0.345 2025 5 11 60806 95.486 425.128 28.5614 0.562 -0.323 0.028 0.022 0.0182 0.545 0.270 2025 5 12 60807 97.029 425.928 28.4876 0.538 -0.338 0.028 0.022 0.0185 0.339 0.206 2025 5 13 60808 98.022 426.818 28.5678 0.507 -0.331 0.027 0.022 0.0187 0.221 0.169 2025 5 14 60809 99.023 427.733 28.7960 0.584 -0.251 0.027 0.022 0.0194 0.247 0.227 2025 5 15 60810 100.142 428.820 29.1543 0.607 -0.153 0.028 0.023 0.0203 0.297 0.302 2025 5 16 60811 100.783 429.947 29.5815 0.479 -0.067 0.029 0.023 0.0208 0.328 0.350 2025 5 17 60812 101.210 430.866 29.9984 0.392 -0.151 0.030 0.024 0.0216 0.500 0.500 2025 5 18 60813 101.618 431.600 30.3423 0.392 -0.167 0.033 0.026 0.0231 0.500 0.500 2025 5 19 60814 102.672 431.811 30.5639 0.385 -0.185 0.035 0.027 0.0259 0.500 0.500 2025 5 20 60815 103.950 432.104 30.6071 0.372 -0.199 0.036 0.029 0.0305 0.500 0.500 2025 5 21 60816 105.188 432.844 30.4191 0.357 -0.207 0.038 0.030 0.0384 0.500 0.500 2025 5 22 60817 106.246 433.783 29.9811 0.342 -0.208 0.039 0.031 0.0517 0.500 0.500 2025 5 23 60818 107.352 434.568 29.3224 0.328 -0.202 0.041 0.033 0.0688 0.500 0.500 2025 5 24 60819 108.105 435.592 28.5708 0.316 -0.190 0.042 0.036 0.0906 0.500 0.500 2025 5 25 60820 108.562 436.425 27.9293 0.308 -0.176 0.044 0.038 0.1255 0.500 0.500 2025 5 26 60821 109.647 436.860 27.5241 0.304 -0.161 0.046 0.043 0.1867 0.500 0.500 2025 5 27 60822 110.649 437.248 27.4733 0.306 -0.150 0.048 0.049 0.2994 0.500 0.500 2025 5 28 60823 111.332 437.603 27.7318 0.312 -0.143 0.053 0.060 0.5037 0.500 0.500 2025 5 29 60824 111.604 437.935 28.1235 0.319 -0.141 0.058 0.077 0.8542 0.500 0.500 2025 5 30 60825 111.998 437.606 28.5130 0.326 -0.143 0.063 0.102 1.4200 0.500 0.500 2025 5 31 60826 112.634 437.396 28.8293 0.330 -0.148 0.071 0.137 2.3068 0.500 0.500 2025 6 1 60827 113.139 437.619 28.9867 0.332 -0.155 0.088 0.196 3.6337 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 4 2 60767 -111.266 -10.016 0.030 0.007 2025 4 3 60768 -111.083 -10.409 0.031 0.007 2025 4 4 60769 -110.674 -10.793 0.033 0.007 2025 4 5 60770 -110.195 -11.065 0.033 0.007 2025 4 6 60771 -109.833 -11.100 0.032 0.007 2025 4 7 60772 -109.636 -10.942 0.032 0.007 2025 4 8 60773 -109.517 -10.734 0.032 0.008 2025 4 9 60774 -109.437 -10.524 0.032 0.008 2025 4 10 60775 -109.381 -10.274 0.032 0.007 2025 4 11 60776 -109.338 -9.996 0.032 0.007 2025 4 12 60777 -109.295 -9.818 0.033 0.008 2025 4 13 60778 -109.260 -9.902 0.034 0.008 2025 4 14 60779 -109.263 -10.217 0.035 0.008 2025 4 15 60780 -109.286 -10.572 0.036 0.008 2025 4 16 60781 -109.236 -10.873 0.042 0.009 2025 4 17 60782 -109.109 -11.136 0.050 0.011 2025 4 18 60783 -108.950 -11.407 0.052 0.011 2025 4 19 60784 -108.728 -11.633 0.053 0.011 2025 4 20 60785 -108.428 -11.682 0.056 0.012 2025 4 21 60786 -108.201 -11.560 0.058 0.012 2025 4 22 60787 -108.239 -11.485 0.060 0.012 2025 4 23 60788 -108.467 -11.590 0.061 0.013 2025 4 24 60789 -108.576 -11.635 0.082 0.016 2025 4 25 60790 -108.571 -11.308 0.109 0.021 2025 4 26 60791 -108.909 -10.691 0.185 0.035 2025 4 27 60792 -109.804 -10.232 0.337 0.063 2025 4 28 60793 -110.892 -10.259 0.515 0.096 2025 4 29 60794 -111.623 -10.654 0.647 0.121 2025 4 30 60795 -111.688 -11.102 1.182 0.219 2025 5 1 60796 -111.250 -11.522 2.042 0.376 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 4 2 60767 0.0609 0.0126 15.04106716807 0.00000000219 2025 4 3 60768 -0.1913 0.0130 15.04106721197 0.00000000226 2025 4 4 60769 -0.2736 0.0133 15.04106722630 0.00000000232 2025 4 5 60770 -0.1803 0.0123 15.04106721006 0.00000000214 2025 4 6 60771 0.0133 0.0122 15.04106717635 0.00000000212 2025 4 7 60772 0.2081 0.0124 15.04106714244 0.00000000216 2025 4 8 60773 0.3946 0.0126 15.04106710998 0.00000000219 2025 4 9 60774 0.5724 0.0117 15.04106707902 0.00000000204 2025 4 10 60775 0.6482 0.0126 15.04106706583 0.00000000219 2025 4 11 60776 0.6538 0.0123 15.04106706485 0.00000000214 2025 4 12 60777 0.6109 0.0116 15.04106707232 0.00000000202 2025 4 13 60778 0.5040 0.0115 15.04106709093 0.00000000200 2025 4 14 60779 0.3361 0.0118 15.04106712016 0.00000000205 2025 4 15 60780 0.1344 0.0119 15.04106715527 0.00000000207 2025 4 16 60781 -0.0567 0.0117 15.04106718854 0.00000000204 2025 4 17 60782 -0.2300 0.0129 15.04106721871 0.00000000225 2025 4 18 60783 -0.3048 0.0126 15.04106723173 0.00000000219 2025 4 19 60784 -0.2814 0.0134 15.04106722766 0.00000000233 2025 4 20 60785 -0.2181 0.0129 15.04106721664 0.00000000225 2025 4 21 60786 -0.0605 0.0128 15.04106718920 0.00000000223 2025 4 22 60787 0.1825 0.0135 15.04106714690 0.00000000235 2025 4 23 60788 0.4478 0.0135 15.04106710071 0.00000000235 2025 4 24 60789 0.7220 0.0126 15.04106705298 0.00000000219 2025 4 25 60790 0.9408 0.0126 15.04106701489 0.00000000219 2025 4 26 60791 0.9835 0.0120 15.04106700746 0.00000000209 2025 4 27 60792 0.8214 0.0123 15.04106703568 0.00000000214 2025 4 28 60793 0.5419 0.0123 15.04106708433 0.00000000214 2025 4 29 60794 0.2210 0.0125 15.04106714020 0.00000000218 2025 4 30 60795 -0.0838 0.0122 15.04106719326 0.00000000212 2025 5 1 60796 -0.2567 0.0124 15.04106722336 0.00000000216 4 - INFORMATION ON TIME SCALES TAI - UTC = 37 s. during period [60767-60796] No leap second introduced during period [60767-60796] 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 59 64 3 - 44 41 10 60767.50 to 60794.21 133 126 32 - 80 75 GSFC gsf2023a.eoxy 61 63 4 10 46 45 11 60767.50 to 60794.21 189 150 27 25 64 60 IAA iaa2021a.eops 69 73 4 - 61 62 11 60767.50 to 60794.21 232 194 24 - 44 118 USNO usn2024b.eoxy 53 63 3 - 55 49 9 60769.27 to 60794.21 119 283 12 - 30 91 OPA opa2024a.eops 140 213 12 - 77 148 10 60769.27 to 60794.21 1477 1942 30 - 296 188 IVS * ivs2023a.eoxy 53 106 5 - 40 37 8 60769.28 to 60794.21 280 223 13 - 3 6 VIE vie2023a.eopxy 212 281 12 - - - 20 60767.00 to 60795.00 1612 2147 29 - - - VIE vie2023a.eoxy - - - - 51 53 11 60767.50 to 60794.21 - - - - 111 86 VLBI Intensive GSI * gsiint2d.eopi - - 5 - - - 6 60770.33 to 60792.33 - - 12 - - - BKG * bkg2023b.eopi - - 6 - - - 55 60767.75 to 60795.75 - - 69 - - - GSFC * gsf2023a.eopi - - 10 - - - 80 60767.75 to 60795.75 - - 51 - - - IAA * iaa2021a.eopi - - 7 - - - 77 60767.75 to 60795.75 - - 36 - - - USNO * usn2024b.eopi - - 35 - - - 59 60767.75 to 60795.75 - - 53 - - - VIE vie2023a.eopi - - 8 - - - 71 60767.75 to 60795.75 - - 76 - - - DGFI dgf2024a.eopi - - 8 - - - 26 60767.75 to 60795.75 - - 61 - - - GPS CODE COD0OPSFIN 3 3 - 0 - - 29 60767.50 to 60795.50 27 25 - 12 - - JPL JPL0OPSFIN 5 5 - 3 - - 29 60767.50 to 60795.50 34 37 - 20 - - GFZ GFZ0OPSFIN 4 4 - 1 - - 29 60767.50 to 60795.50 40 33 - 16 - - ESA ESA0OPSFIN 5 5 - 1 - - 29 60767.50 to 60795.50 26 33 - 14 - - SIO SIO0OPSFIN 24 23 - 10 - - 29 60767.50 to 60795.50 34 45 - 25 - - EMR EMR0OPSRAP 3 3 - 1 - - 29 60767.50 to 60795.50 50 63 - 14 - - IAA gnss.res 0 0 - 0 - - 26 60767.50 to 60795.50 56 67 - 23 - - GRGS GRG0OPSFIN 268 268 - 0 - - 29 60767.50 to 60795.50 25 29 - 15 - - ASI asi*.erp 10 9 - 0 - - 18 60767.50 to 60795.50 17 24 - 60 - - MIT MIT0OPSFIN 10 10 - 1 - - 29 60767.50 to 60795.50 42 45 - 18 - - IGS * IGS0OPSRAP 10 9 - 2 - - 29 60767.50 to 60795.50 28 30 - 11 - - IGS * IGS0OPSFIN 7 7 - 2 - - 29 60767.50 to 60795.50 22 25 - 13 - - SLR MCC tg*.02 310 356 - 35 - - 30 60767.00 to 60796.00 264 254 - 180 - - IAA slr_v.dat 72 91 - 5 - - 28 60767.00 to 60796.00 163 220 - 23 - - ASI asi.*.eop 58 76 - 14 - - 29 60767.50 to 60795.50 162 301 - 83 - - ILRS * ilrsa.eop 43 51 - 8 - - 29 60767.50 to 60795.50 107 192 - 27 - - BULLETIN A NEOS mark3.out 18 19 11 - - - 30 60767.00 to 60796.00 26 29 15 - - - To unsubscribe : http://hpiers.obspm.fr/eop-pc/products/bulletins/bulletin_registration.html