BULLETIN B 444 4 February 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 0.044 0.0450 0.094 0.077 2024 12 2 60646 192.208 327.532 49.8472 0.408 -0.028 0.057 0.044 0.0103 0.443 0.074 2024 12 3 60647 190.496 326.392 50.2138 0.402 -0.057 0.056 0.043 0.0104 0.066 0.054 2024 12 4 60648 188.732 325.096 50.6101 0.414 -0.063 0.054 0.042 0.0226 0.059 0.050 2024 12 5 60649 186.787 323.713 50.9416 0.413 -0.062 0.055 0.042 0.0187 0.055 0.046 2024 12 6 60650 185.108 322.045 51.1470 0.429 -0.052 0.054 0.043 0.0161 0.035 0.033 2024 12 7 60651 183.476 320.301 51.1463 0.461 -0.083 0.053 0.042 0.0137 0.037 0.034 2024 12 8 60652 181.851 318.730 50.8705 0.505 -0.131 0.053 0.042 0.0141 0.040 0.038 2024 12 9 60653 180.220 317.430 50.3526 0.540 -0.176 0.052 0.044 0.0146 0.044 0.041 2024 12 10 60654 178.698 316.093 49.6914 0.556 -0.208 0.053 0.043 0.0163 0.046 0.044 2024 12 11 60655 177.522 315.103 48.9984 0.512 -0.191 0.053 0.044 0.0179 0.050 0.048 2024 12 12 60656 176.589 314.511 48.4309 0.439 -0.150 0.052 0.044 0.0203 0.055 0.055 2024 12 13 60657 175.372 313.963 48.0775 0.356 -0.099 0.053 0.045 0.0241 0.060 0.061 2024 12 14 60658 173.879 313.255 47.9918 0.267 -0.041 0.054 0.046 0.0230 0.061 0.062 2024 12 15 60659 172.215 312.200 48.1268 0.187 0.015 0.054 0.047 0.0189 0.060 0.060 2024 12 16 60660 170.389 311.452 48.4038 0.130 0.059 0.055 0.045 0.0170 0.059 0.059 2024 12 17 60661 168.632 310.703 48.6926 0.108 0.083 0.055 0.044 0.0163 0.058 0.057 2024 12 18 60662 166.921 310.242 48.8531 0.176 0.055 0.055 0.044 0.0150 0.060 0.057 2024 12 19 60663 165.898 309.648 48.7959 0.286 0.000 0.056 0.044 0.0138 0.062 0.057 2024 12 20 60664 164.808 309.719 48.5148 0.411 -0.065 0.055 0.044 0.0129 0.064 0.056 2024 12 21 60665 163.570 309.782 48.0670 0.464 -0.102 0.054 0.044 0.0121 0.067 0.058 2024 12 22 60666 162.423 309.760 47.5094 0.463 -0.116 0.055 0.042 0.0118 0.073 0.062 2024 12 23 60667 161.200 309.920 46.8958 0.438 -0.123 0.055 0.043 0.0129 0.085 0.071 2024 12 24 60668 159.661 310.096 46.3265 0.396 -0.127 0.059 0.044 0.0163 0.102 0.084 2024 12 25 60669 156.978 309.778 45.8528 0.346 -0.130 0.059 0.048 0.0233 0.119 0.096 2024 12 26 60670 153.955 308.899 45.5006 0.294 -0.136 0.056 0.047 0.0362 0.129 0.103 2024 12 27 60671 151.206 307.972 45.3125 0.249 -0.148 0.054 0.047 0.0559 0.133 0.107 2024 12 28 60672 149.023 306.995 45.2920 0.247 -0.191 0.054 0.047 0.0865 0.139 0.119 2024 12 29 60673 147.635 306.307 45.4520 0.264 -0.245 0.053 0.047 0.1320 0.150 0.145 2024 12 30 60674 146.407 305.774 45.7159 0.284 -0.297 0.053 0.044 0.2008 0.163 0.173 2024 12 31 60675 145.073 305.386 46.0256 0.306 -0.346 0.051 0.044 0.2787 0.172 0.194 2025 1 1 60676 144.124 305.086 46.3221 0.301 -0.349 0.051 0.043 0.2139 0.171 0.194 Preliminary extension 2025 1 2 60677 142.938 304.989 46.4717 0.283 -0.327 0.051 0.043 0.1154 0.164 0.187 2025 1 3 60678 142.301 304.928 46.3402 0.264 -0.296 0.053 0.043 0.0636 0.150 0.172 2025 1 4 60679 141.397 305.439 45.9225 0.249 -0.261 0.053 0.042 0.0402 0.129 0.150 2025 1 5 60680 140.267 305.280 45.2675 0.243 -0.228 0.053 0.042 0.0293 0.108 0.128 2025 1 6 60681 139.641 305.280 44.4495 0.249 -0.202 0.050 0.039 0.0227 0.095 0.115 2025 1 7 60682 138.543 305.609 43.6295 0.273 -0.189 0.048 0.037 0.0170 0.089 0.108 2025 1 8 60683 137.035 305.488 42.9485 0.319 -0.194 0.046 0.036 0.0127 0.086 0.105 2025 1 9 60684 135.224 305.405 42.5432 0.411 -0.246 0.045 0.035 0.0100 0.090 0.110 2025 1 10 60685 133.148 305.282 42.4747 0.505 -0.295 0.044 0.035 0.0080 0.095 0.116 2025 1 11 60686 130.843 305.009 42.6684 0.680 -0.322 0.044 0.035 0.0065 0.104 0.127 2025 1 12 60687 128.904 304.679 43.0509 0.851 -0.317 0.044 0.035 0.0057 0.117 0.144 2025 1 13 60688 126.892 304.055 43.5398 0.888 -0.273 0.044 0.035 0.0056 0.129 0.158 2025 1 14 60689 124.486 303.292 44.0063 0.691 -0.183 0.044 0.034 0.0058 0.136 0.166 2025 1 15 60690 122.727 302.789 44.3698 0.339 -0.155 0.045 0.034 0.0056 0.500 0.500 2025 1 16 60691 121.695 302.459 44.5707 0.339 -0.159 0.045 0.034 0.0054 0.500 0.500 2025 1 17 60692 120.737 302.521 44.6030 0.338 -0.158 0.047 0.034 0.0049 0.500 0.500 2025 1 18 60693 119.979 302.310 44.5048 0.336 -0.151 0.049 0.036 0.0047 0.500 0.500 2025 1 19 60694 120.059 302.558 44.3532 0.333 -0.142 0.052 0.037 0.0048 0.500 0.500 2025 1 20 60695 120.605 303.139 44.2011 0.330 -0.135 0.056 0.040 0.0054 0.500 0.500 2025 1 21 60696 121.076 303.650 44.1143 0.326 -0.134 0.060 0.044 0.0065 0.500 0.500 2025 1 22 60697 120.681 304.114 44.1543 0.323 -0.138 0.064 0.048 0.0076 0.500 0.500 2025 1 23 60698 119.826 304.326 44.3859 0.321 -0.146 0.069 0.053 0.0082 0.500 0.500 2025 1 24 60699 118.352 304.716 44.8242 0.321 -0.156 0.072 0.058 0.0086 0.500 0.500 2025 1 25 60700 116.058 305.082 45.4763 0.323 -0.164 0.073 0.060 0.0091 0.500 0.500 2025 1 26 60701 113.864 305.617 46.2140 0.327 -0.173 0.074 0.060 0.0093 0.500 0.500 2025 1 27 60702 111.773 306.099 46.9423 0.330 -0.182 0.074 0.059 0.0108 0.500 0.500 2025 1 28 60703 109.753 306.358 47.5466 0.332 -0.192 0.074 0.058 0.0137 0.500 0.500 2025 1 29 60704 107.967 306.974 47.9351 0.331 -0.202 0.072 0.058 0.0175 0.500 0.500 2025 1 30 60705 106.637 307.588 48.0642 0.326 -0.209 0.073 0.059 0.0217 0.500 0.500 2025 1 31 60706 105.519 308.213 47.8917 0.317 -0.210 0.077 0.064 0.0255 0.500 0.500 2025 2 1 60707 103.885 308.758 47.4313 0.305 -0.206 0.083 0.072 0.0283 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 2024 12 2 60646 -114.279 -7.168 1.112 0.074 2024 12 3 60647 -114.035 -7.093 0.166 0.054 2024 12 4 60648 -113.611 -6.965 0.149 0.050 2024 12 5 60649 -113.256 -6.916 0.138 0.046 2024 12 6 60650 -112.958 -6.956 0.089 0.033 2024 12 7 60651 -112.667 -7.059 0.093 0.034 2024 12 8 60652 -112.362 -7.101 0.101 0.038 2024 12 9 60653 -112.179 -6.993 0.109 0.041 2024 12 10 60654 -112.265 -6.733 0.116 0.044 2024 12 11 60655 -112.722 -6.408 0.125 0.048 2024 12 12 60656 -113.290 -6.220 0.139 0.055 2024 12 13 60657 -113.693 -6.258 0.151 0.061 2024 12 14 60658 -113.852 -6.416 0.153 0.062 2024 12 15 60659 -113.858 -6.535 0.151 0.060 2024 12 16 60660 -113.801 -6.562 0.148 0.059 2024 12 17 60661 -113.617 -6.552 0.147 0.057 2024 12 18 60662 -113.114 -6.551 0.150 0.057 2024 12 19 60663 -112.500 -6.488 0.156 0.057 2024 12 20 60664 -112.024 -6.345 0.162 0.056 2024 12 21 60665 -111.959 -6.177 0.168 0.058 2024 12 22 60666 -112.158 -6.091 0.183 0.062 2024 12 23 60667 -112.423 -6.086 0.213 0.071 2024 12 24 60668 -112.694 -6.077 0.257 0.084 2024 12 25 60669 -112.946 -6.035 0.298 0.096 2024 12 26 60670 -113.150 -6.042 0.324 0.103 2024 12 27 60671 -113.294 -6.194 0.335 0.107 2024 12 28 60672 -113.334 -6.496 0.350 0.119 2024 12 29 60673 -113.354 -6.795 0.378 0.145 2024 12 30 60674 -113.329 -6.950 0.409 0.173 2024 12 31 60675 -113.171 -6.938 0.431 0.194 2025 1 1 60676 -112.943 -6.801 0.429 0.194 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 2024 12 2 60646 -0.3415 0.0277 15.04106723812 0.00000000482 2024 12 3 60647 -0.3927 0.0277 15.04106724703 0.00000000482 2024 12 4 60648 -0.3814 0.0267 15.04106724507 0.00000000465 2024 12 5 60649 -0.2794 0.0258 15.04106722731 0.00000000449 2024 12 6 60650 -0.1132 0.0269 15.04106719838 0.00000000468 2024 12 7 60651 0.1340 0.0286 15.04106715534 0.00000000498 2024 12 8 60652 0.4116 0.0298 15.04106710702 0.00000000519 2024 12 9 60653 0.6053 0.0319 15.04106707330 0.00000000555 2024 12 10 60654 0.6964 0.0296 15.04106705744 0.00000000515 2024 12 11 60655 0.6565 0.0277 15.04106706438 0.00000000482 2024 12 12 60656 0.4762 0.0270 15.04106709577 0.00000000470 2024 12 13 60657 0.2191 0.0251 15.04106714053 0.00000000437 2024 12 14 60658 -0.0398 0.0239 15.04106718560 0.00000000416 2024 12 15 60659 -0.2235 0.0244 15.04106721758 0.00000000425 2024 12 16 60660 -0.3054 0.0239 15.04106723184 0.00000000416 2024 12 17 60661 -0.2453 0.0239 15.04106722137 0.00000000416 2024 12 18 60662 -0.0629 0.0231 15.04106718962 0.00000000402 2024 12 19 60663 0.1729 0.0226 15.04106714857 0.00000000393 2024 12 20 60664 0.3759 0.0223 15.04106711323 0.00000000388 2024 12 21 60665 0.5136 0.0216 15.04106708926 0.00000000376 2024 12 22 60666 0.5955 0.0214 15.04106707500 0.00000000373 2024 12 23 60667 0.6128 0.0215 15.04106707199 0.00000000374 2024 12 24 60668 0.5276 0.0290 15.04106708682 0.00000000505 2024 12 25 60669 0.4161 0.0276 15.04106710623 0.00000000480 2024 12 26 60670 0.2760 0.0264 15.04106713062 0.00000000460 2024 12 27 60671 0.0976 0.0253 15.04106716168 0.00000000440 2024 12 28 60672 -0.0849 0.0235 15.04106719345 0.00000000409 2024 12 29 60673 -0.2223 0.0239 15.04106721737 0.00000000416 2024 12 30 60674 -0.2949 0.0248 15.04106723001 0.00000000432 2024 12 31 60675 -0.3151 0.0246 15.04106723352 0.00000000428 2025 1 1 60676 -0.2457 0.0242 15.04106722144 0.00000000421 4 - INFORMATION ON TIME SCALES TAI - UTC = 37 s. during period [60646-60676] No leap second introduced during period [60646-60676] 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 77 118 6 19 51 55 12 60647.21 to 60675.21 156 193 29 14 122 74 IAA iaa2021a.eops 100 135 7 - 91 94 11 60647.21 to 60675.21 212 94 25 - 111 77 USNO usn2024b.eoxy 85 137 7 - 67 71 10 60647.21 to 60675.21 191 212 30 - 136 110 OPA opa2024a.eops 127 187 12 - 58 169 6 60647.21 to 60664.27 2965 2591 30 - 109 344 IVS * ivs2023a.eoxy 111 288 13 - 60 66 8 60647.23 to 60675.22 291 1180 28 - 16 6 ASI asi2023a.eoxy 357 299 29 - 410 439 11 60647.21 to 60675.21 2152 1739 91 - 202 244 VIE vie2023a.eopxy 271 421 20 - - - 14 60647.00 to 60676.00 539 1339 23 - - - VIE vie2023a.eoxy - - - - 63 82 7 60647.21 to 60675.21 - - - - 110 102 VLBI Intensive GSI * gsiint2d.eopi - - 5 - - - 6 60651.33 to 60673.33 - - 33 - - - BKG * bkg2023b.eopi - - 8 - - - 51 60646.25 to 60674.75 - - 66 - - - GSFC * gsf2023a.eopi - - 10 - - - 72 60646.25 to 60675.72 - - 30 - - - IAA * iaa2021a.eopi - - 6 - - - 69 60646.25 to 60675.72 - - 32 - - - USNO * usn2024b.eopi - - 15 - - - 55 60646.25 to 60675.72 - - 31 - - - VIE vie2023a.eopi - - 7 - - - 71 60646.25 to 60675.72 - - 32 - - - DGFI dgf2024a.eopi - - 6 - - - 31 60646.25 to 60674.75 - - 37 - - - GPS CODE COD0OPSFIN 3 3 - 0 - - 30 60646.50 to 60675.50 39 26 - 13 - - JPL JPL0OPSFIN 5 5 - 3 - - 30 60646.50 to 60675.50 53 35 - 16 - - GFZ GFZ0OPSFIN 5 5 - 1 - - 30 60646.50 to 60675.50 33 36 - 14 - - ESA ESA0OPSFIN 6 6 - 2 - - 30 60646.50 to 60675.50 33 27 - 12 - - SIO SIO0OPSFIN 24 23 - 9 - - 30 60646.50 to 60675.50 48 48 - 22 - - EMR EMR0OPSRAP 3 3 - 0 - - 30 60646.50 to 60675.50 58 53 - 12 - - IAA gnss.res 0 0 - 0 - - 29 60646.50 to 60674.50 55 50 - 20 - - GRGS GRG0OPSFIN 262 262 - 0 - - 30 60646.50 to 60675.50 32 35 - 13 - - ASI asi*.erp 10 9 - 0 - - 28 60646.50 to 60675.50 16 24 - 69 - - MIT MIT0OPSFIN 10 10 - 1 - - 30 60646.50 to 60675.50 52 39 - 17 - - IGS * IGS0OPSRAP 11 9 - 2 - - 30 60646.50 to 60675.50 31 28 - 13 - - IGS * IGS0OPSFIN 8 8 - 1 - - 30 60646.50 to 60675.50 30 24 - 13 - - SLR MCC tg*.02 270 300 - 35 - - 31 60646.00 to 60676.00 202 174 - 102 - - IAA slr_v.dat 101 106 - 6 - - 30 60646.00 to 60676.00 243 280 - 27 - - ASI asi.*.eop 67 67 - 17 - - 30 60646.50 to 60675.50 203 223 - 102 - - ILRS * ilrsa.eop 50 51 - 10 - - 30 60646.50 to 60675.50 118 127 - 24 - - BULLETIN A NEOS mark3.out 20 18 11 - - - 31 60646.00 to 60676.00 36 21 20 - - - To unsubscribe : http://hpiers.obspm.fr/eop-pc/products/bulletins/bulletin_registration.html