BULLETIN B 423 3 May 2023 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 0.067 0.063 0.0190 0.204 0.239 2023 3 2 60005 -46.065 318.766 -15.0624 0.311 0.120 0.073 0.081 0.0176 0.082 0.071 2023 3 3 60006 -46.677 321.138 -14.8245 0.309 0.187 0.075 0.081 0.0161 0.085 0.073 2023 3 4 60007 -46.882 323.792 -14.6819 0.320 0.173 0.079 0.079 0.0156 0.081 0.073 2023 3 5 60008 -46.540 326.621 -14.6823 0.336 0.111 0.080 0.078 0.0154 0.078 0.071 2023 3 6 60009 -45.657 329.817 -14.9129 0.350 0.035 0.079 0.075 0.0152 0.074 0.069 2023 3 7 60010 -44.599 333.296 -15.3659 0.354 -0.038 0.076 0.071 0.0151 0.072 0.067 2023 3 8 60011 -43.530 336.616 -16.0051 0.329 -0.056 0.074 0.068 0.0148 0.077 0.074 2023 3 9 60012 -42.352 339.803 -16.7760 0.294 -0.053 0.073 0.066 0.0144 0.086 0.086 2023 3 10 60013 -41.322 343.084 -17.6027 0.259 -0.043 0.072 0.064 0.0144 0.094 0.097 2023 3 11 60014 -40.776 346.390 -18.4047 0.246 -0.048 0.071 0.064 0.0157 0.135 0.149 2023 3 12 60015 -40.519 349.496 -19.0910 0.247 -0.062 0.070 0.064 0.0182 0.216 0.250 2023 3 13 60016 -40.097 352.572 -19.6023 0.257 -0.077 0.069 0.066 0.0225 0.302 0.359 2023 3 14 60017 -39.717 355.976 -19.9116 0.273 -0.091 0.069 0.068 0.0292 0.360 0.433 2023 3 15 60018 -39.696 359.397 -20.0604 0.296 -0.100 0.070 0.070 0.0393 0.578 0.715 2023 3 16 60019 -39.824 362.249 -20.0712 0.318 -0.106 0.072 0.071 0.0484 0.875 1.098 2023 3 17 60020 -39.666 364.628 -20.0376 0.319 -0.111 0.074 0.072 0.0417 0.888 1.115 2023 3 18 60021 -39.047 366.850 -20.1299 0.301 -0.114 0.074 0.074 0.0312 0.729 0.914 2023 3 19 60022 -38.102 368.994 -20.4875 0.277 -0.113 0.071 0.073 0.0251 0.498 0.618 2023 3 20 60023 -36.907 371.284 -21.1416 0.251 -0.107 0.068 0.069 0.0205 0.279 0.340 2023 3 21 60024 -35.480 373.974 -22.0007 0.231 -0.095 0.063 0.063 0.0167 0.145 0.168 2023 3 22 60025 -33.918 377.072 -22.9616 0.239 -0.071 0.058 0.055 0.0139 0.111 0.125 2023 3 23 60026 -32.503 380.245 -23.8876 0.258 -0.040 0.057 0.052 0.0121 0.084 0.090 2023 3 24 60027 -31.173 383.274 -24.6908 0.278 -0.005 0.059 0.050 0.0117 0.061 0.061 2023 3 25 60028 -29.863 386.430 -25.2241 0.299 0.044 0.059 0.049 0.0125 0.054 0.052 2023 3 26 60029 -28.402 389.466 -25.4315 0.318 0.095 0.061 0.048 0.0137 0.050 0.046 2023 3 27 60030 -26.589 392.633 -25.3926 0.331 0.135 0.062 0.051 0.0138 0.046 0.040 2023 3 28 60031 -24.718 395.445 -25.1809 0.335 0.156 0.058 0.050 0.0133 0.042 0.035 2023 3 29 60032 -23.029 397.858 -24.8761 0.317 0.120 0.055 0.049 0.0128 0.041 0.034 2023 3 30 60033 -21.735 400.017 -24.5819 0.291 0.058 0.055 0.050 0.0126 0.038 0.032 2023 3 31 60034 -20.397 402.194 -24.3867 0.266 -0.009 0.060 0.053 0.0125 0.036 0.031 2023 4 1 60035 -18.832 404.562 -24.3447 0.273 -0.056 0.063 0.056 0.0133 0.036 0.032 Preliminary extension 2023 4 2 60036 -17.339 407.431 -24.4585 0.295 -0.086 0.063 0.053 0.0147 0.038 0.034 2023 4 3 60037 -15.648 409.984 -24.7405 0.314 -0.106 0.063 0.051 0.0167 0.040 0.037 2023 4 4 60038 -13.784 412.616 -25.2142 0.322 -0.116 0.056 0.046 0.0185 0.041 0.039 2023 4 5 60039 -12.266 415.535 -25.8342 0.295 -0.118 0.052 0.043 0.0183 0.043 0.040 2023 4 6 60040 -10.758 418.250 -26.5361 0.254 -0.111 0.049 0.041 0.0172 0.046 0.041 2023 4 7 60041 -9.071 421.270 -27.2458 0.234 -0.093 0.047 0.039 0.0177 0.049 0.045 2023 4 8 60042 -7.875 423.780 -27.9171 0.234 -0.067 0.046 0.039 0.0201 0.057 0.055 2023 4 9 60043 -6.550 426.320 -28.4822 0.242 -0.036 0.045 0.039 0.0240 0.068 0.069 2023 4 10 60044 -5.303 428.845 -28.8513 0.255 -0.006 0.045 0.040 0.0281 0.080 0.083 2023 4 11 60045 -4.080 431.350 -29.0309 0.268 0.021 0.045 0.040 0.0309 0.087 0.092 2023 4 12 60046 -2.902 434.183 -29.0477 0.277 0.039 0.045 0.040 0.0294 0.090 0.097 2023 4 13 60047 -2.439 436.721 -28.9996 0.332 0.046 0.046 0.041 0.0217 0.096 0.106 2023 4 14 60048 -1.745 439.269 -29.0226 0.294 0.038 0.047 0.042 0.0169 0.101 0.115 2023 4 15 60049 -1.197 441.725 -29.2658 0.231 -0.131 0.048 0.044 0.0138 0.500 0.500 2023 4 16 60050 0.224 443.552 -29.8257 0.223 -0.131 0.050 0.045 0.0131 0.500 0.500 2023 4 17 60051 1.713 445.321 -30.6465 0.210 -0.129 0.052 0.045 0.0128 0.500 0.500 2023 4 18 60052 2.954 446.925 -31.6079 0.197 -0.125 0.053 0.045 0.0128 0.500 0.500 2023 4 19 60053 4.322 448.650 -32.5363 0.188 -0.118 0.054 0.046 0.0132 0.500 0.500 2023 4 20 60054 5.723 450.460 -33.3482 0.185 -0.106 0.055 0.046 0.0122 0.500 0.500 2023 4 21 60055 7.442 452.656 -33.9656 0.187 -0.092 0.055 0.046 0.0110 0.500 0.500 2023 4 22 60056 9.161 455.148 -34.2903 0.193 -0.080 0.055 0.046 0.0106 0.500 0.500 2023 4 23 60057 10.710 457.852 -34.3634 0.200 -0.071 0.054 0.046 0.0104 0.500 0.500 2023 4 24 60058 12.618 460.622 -34.2711 0.207 -0.070 0.053 0.045 0.0105 0.500 0.500 2023 4 25 60059 14.952 462.938 -34.0788 0.215 -0.073 0.054 0.045 0.0106 0.500 0.500 2023 4 26 60060 17.330 464.994 -33.8497 0.225 -0.080 0.055 0.045 0.0102 0.500 0.500 2023 4 27 60061 19.418 467.153 -33.6331 0.234 -0.085 0.056 0.046 0.0102 0.500 0.500 2023 4 28 60062 21.427 469.088 -33.5083 0.243 -0.089 0.059 0.048 0.0107 0.500 0.500 2023 4 29 60063 23.834 470.667 -33.5620 0.246 -0.092 0.063 0.052 0.0119 0.500 0.500 2023 4 30 60064 26.007 472.104 -33.8041 0.244 -0.097 0.070 0.056 0.0140 0.500 0.500 2023 5 1 60065 27.592 473.471 -34.2214 0.235 -0.104 0.078 0.062 0.0182 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 2023 3 2 60005 -109.433 -7.347 0.207 0.071 2023 3 3 60006 -108.998 -7.328 0.213 0.073 2023 3 4 60007 -108.638 -7.416 0.204 0.073 2023 3 5 60008 -108.483 -7.439 0.196 0.071 2023 3 6 60009 -108.456 -7.322 0.187 0.069 2023 3 7 60010 -108.413 -7.174 0.180 0.067 2023 3 8 60011 -108.388 -7.094 0.194 0.074 2023 3 9 60012 -108.432 -7.140 0.217 0.086 2023 3 10 60013 -108.573 -7.251 0.237 0.097 2023 3 11 60014 -108.718 -7.379 0.340 0.149 2023 3 12 60015 -108.819 -7.513 0.542 0.250 2023 3 13 60016 -108.854 -7.660 0.758 0.359 2023 3 14 60017 -108.796 -7.801 0.905 0.433 2023 3 15 60018 -108.636 -7.924 1.454 0.715 2023 3 16 60019 -108.426 -8.068 2.200 1.098 2023 3 17 60020 -108.244 -8.259 2.231 1.115 2023 3 18 60021 -108.073 -8.402 1.834 0.914 2023 3 19 60022 -107.908 -8.371 1.251 0.618 2023 3 20 60023 -107.809 -8.185 0.702 0.340 2023 3 21 60024 -107.798 -8.018 0.364 0.168 2023 3 22 60025 -107.800 -7.977 0.279 0.125 2023 3 23 60026 -107.871 -8.006 0.211 0.090 2023 3 24 60027 -108.068 -8.026 0.153 0.061 2023 3 25 60028 -108.334 -8.069 0.136 0.052 2023 3 26 60029 -108.511 -8.224 0.126 0.046 2023 3 27 60030 -108.515 -8.443 0.115 0.040 2023 3 28 60031 -108.385 -8.580 0.107 0.035 2023 3 29 60032 -108.184 -8.619 0.102 0.034 2023 3 30 60033 -107.840 -8.642 0.096 0.032 2023 3 31 60034 -107.382 -8.762 0.090 0.031 2023 4 1 60035 -106.941 -8.931 0.091 0.032 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 2023 3 2 60005 -0.2387 0.0276 15.04106722022 0.00000000480 2023 3 3 60006 -0.2062 0.0272 15.04106721457 0.00000000474 2023 3 4 60007 -0.0776 0.0273 15.04106719218 0.00000000475 2023 3 5 60008 0.1030 0.0279 15.04106716074 0.00000000486 2023 3 6 60009 0.3456 0.0282 15.04106711851 0.00000000491 2023 3 7 60010 0.5547 0.0280 15.04106708210 0.00000000487 2023 3 8 60011 0.7164 0.0280 15.04106705395 0.00000000487 2023 3 9 60012 0.8130 0.0280 15.04106703714 0.00000000487 2023 3 10 60013 0.8282 0.0277 15.04106703449 0.00000000482 2023 3 11 60014 0.7582 0.0276 15.04106704668 0.00000000480 2023 3 12 60015 0.6061 0.0280 15.04106707316 0.00000000487 2023 3 13 60016 0.4110 0.0283 15.04106710712 0.00000000493 2023 3 14 60017 0.2175 0.0281 15.04106714081 0.00000000489 2023 3 15 60018 0.0717 0.0282 15.04106716619 0.00000000491 2023 3 16 60019 -0.0295 0.0282 15.04106718381 0.00000000491 2023 3 17 60020 0.0017 0.0284 15.04106717837 0.00000000494 2023 3 18 60021 0.2064 0.0285 15.04106714274 0.00000000496 2023 3 19 60022 0.5080 0.0283 15.04106709023 0.00000000493 2023 3 20 60023 0.7792 0.0272 15.04106704302 0.00000000474 2023 3 21 60024 0.9296 0.0250 15.04106701684 0.00000000435 2023 3 22 60025 0.9596 0.0226 15.04106701162 0.00000000393 2023 3 23 60026 0.8776 0.0224 15.04106702589 0.00000000390 2023 3 24 60027 0.6877 0.0216 15.04106705895 0.00000000376 2023 3 25 60028 0.3734 0.0213 15.04106711367 0.00000000371 2023 3 26 60029 0.0649 0.0232 15.04106716737 0.00000000404 2023 3 27 60030 -0.1361 0.0250 15.04106720236 0.00000000435 2023 3 28 60031 -0.2733 0.0248 15.04106722625 0.00000000432 2023 3 29 60032 -0.3175 0.0228 15.04106723394 0.00000000397 2023 3 30 60033 -0.2598 0.0228 15.04106722390 0.00000000397 2023 3 31 60034 -0.1267 0.0226 15.04106720073 0.00000000393 2023 4 1 60035 0.0379 0.0215 15.04106717207 0.00000000374 4 - INFORMATION ON TIME SCALES TAI - UTC = 37 s. during period [60005-60035] No leap second introduced during period [60005-60035] 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 bkg2023a.eoxy 66 61 3 - 42 46 10 60006.27 to 60034.27 135 101 19 - 53 54 GSFC gsf2020a.eoxy 57 53 3 8 42 45 10 60006.27 to 60034.27 78 97 16 9 41 32 IAA iaa2021a.eops 178 218 12 - 162 138 2 60010.21 to 60019.27 538 636 15 - 250 272 USNO usn2023a.eoxy 57 59 3 - 53 55 10 60006.27 to 60034.27 106 110 18 - 65 106 IVS * ivs2023a.eoxy 106 131 6 - 69 88 9 60006.27 to 60034.28 58 134 24 - 5 6 VLBI Intensive GSI * gsiint2c.eopi - - 9 - - - 8 60007.33 to 60029.33 - - 27 - - - BKG * bkg2023.eopi - - 8 - - - 47 60005.79 to 60034.80 - - 37 - - - GSFC * gsf2023a.eopi - - 12 - - - 45 60005.79 to 60034.80 - - 56 - - - IAA * iaa2021a.eopi - - 43 - - - 62 60005.79 to 60034.80 - - 95 - - - USNO * usn2023a.eopi - - 9 - - - 44 60005.79 to 60034.80 - - 53 - - - GPS CODE COD0OPSFIN 3 3 - 0 - - 30 60005.50 to 60034.50 46 43 - 13 - - JPL JPL0OPSFIN 10 12 - 7 - - 30 60005.50 to 60034.50 59 53 - 19 - - GFZ GFZ0OPSFIN 4 4 - 1 - - 30 60005.50 to 60034.50 42 50 - 15 - - ESA ESA0OPSFIN 5 6 - 3 - - 30 60005.50 to 60034.50 48 49 - 14 - - SIO SIO0OPSFIN 22 21 - 10 - - 30 60005.50 to 60034.50 55 59 - 22 - - EMR EMR0OPSFIN 10 10 - 3 - - 30 60005.50 to 60034.50 68 58 - 10 - - IAA gnss.res 0 0 - 0 - - 29 60005.50 to 60033.50 58 83 - 35 - - GRGS GRG0OPSFIN 264 264 - 0 - - 30 60005.50 to 60034.50 39 44 - 13 - - ASI asi*.erp 21 20 - 0 - - 24 60005.50 to 60031.50 5808 58 - 154 - - MIT MIT0OPSFIN 10 10 - 1 - - 30 60005.50 to 60034.50 55 60 - 20 - - IGR * IGS0OPSRAP 12 12 - 2 - - 30 60005.50 to 60034.50 45 46 - 11 - - IGS * IGS0OPSFIN 10 12 - 2 - - 30 60005.50 to 60034.50 39 40 - 13 - - SLR MCC tg*.02 279 281 - 41 - - 30 60005.00 to 60035.00 217 197 - 117 - - IAA slr_v.dat 108 111 - 6 - - 28 60005.00 to 60035.00 400 297 - 27 - - ASI asi.*.eops 160 136 - 31 - - 30 60005.50 to 60034.50 364 396 - 105 - - ILRS * ilrsa.eop 99 85 - 15 - - 30 60005.50 to 60034.50 225 275 - 45 - - BULLETIN A NEOS mark3.out 17 15 5 - - - 31 60005.00 to 60035.00 15 23 11 - - - To unsubscribe : http://hpiers.obspm.fr/eop-pc/products/bulletins/bulletin_registration.html