BULLETIN B 422 1 April 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 0.036 0.026 0.0096 0.090 0.087 2023 2 2 59977 -3.547 250.346 -13.8591 0.405 -0.162 0.037 0.027 0.0101 0.090 0.108 2023 2 3 59978 -4.856 252.572 -13.0960 0.373 -0.167 0.037 0.027 0.0101 0.091 0.109 2023 2 4 59979 -6.428 254.285 -12.4190 0.342 -0.159 0.037 0.027 0.0100 0.091 0.108 2023 2 5 59980 -8.204 255.923 -11.8777 0.311 -0.146 0.037 0.027 0.0099 0.091 0.107 2023 2 6 59981 -9.964 257.731 -11.4958 0.280 -0.132 0.038 0.027 0.0095 0.091 0.105 2023 2 7 59982 -11.876 259.655 -11.2745 0.250 -0.119 0.038 0.027 0.0094 0.091 0.104 2023 2 8 59983 -14.175 261.674 -11.1959 0.269 -0.090 0.038 0.027 0.0093 0.091 0.103 2023 2 9 59984 -15.815 263.434 -11.2446 0.302 -0.056 0.038 0.027 0.0093 0.091 0.102 2023 2 10 59985 -16.692 265.519 -11.4722 0.334 -0.023 0.038 0.027 0.0092 0.091 0.101 2023 2 11 59986 -17.796 268.043 -11.7909 0.340 -0.040 0.038 0.027 0.0093 0.091 0.099 2023 2 12 59987 -19.580 270.405 -12.1316 0.335 -0.077 0.038 0.027 0.0093 0.091 0.097 2023 2 13 59988 -21.949 273.140 -12.3642 0.330 -0.114 0.038 0.027 0.0092 0.091 0.095 2023 2 14 59989 -24.489 275.701 -12.4632 0.325 -0.151 0.038 0.026 0.0092 0.091 0.093 2023 2 15 59990 -26.961 278.194 -12.3539 0.270 -0.143 0.038 0.026 0.0091 0.091 0.090 2023 2 16 59991 -29.393 280.732 -12.0613 0.201 -0.124 0.038 0.026 0.0091 0.090 0.087 2023 2 17 59992 -31.780 282.935 -11.6902 0.133 -0.104 0.038 0.026 0.0092 0.090 0.085 2023 2 18 59993 -34.066 284.869 -11.3623 0.153 -0.120 0.038 0.026 0.0093 0.090 0.081 2023 2 19 59994 -35.884 286.825 -11.3117 0.206 -0.149 0.037 0.026 0.0094 0.090 0.078 2023 2 20 59995 -37.338 288.920 -11.5669 0.259 -0.177 0.037 0.026 0.0093 0.089 0.074 2023 2 21 59996 -38.274 291.422 -12.1587 0.312 -0.206 0.037 0.026 0.0093 0.089 0.072 2023 2 22 59997 -38.866 294.588 -12.9291 0.320 -0.173 0.036 0.026 0.0103 0.089 0.069 2023 2 23 59998 -38.960 298.263 -13.7066 0.316 -0.124 0.036 0.026 0.0102 0.089 0.066 2023 2 24 59999 -39.119 301.926 -14.5020 0.312 -0.075 0.035 0.026 0.0101 0.088 0.064 2023 2 25 60000 -39.564 305.114 -15.1424 0.315 -0.051 0.035 0.026 0.0101 0.089 0.065 2023 2 26 60001 -40.856 308.232 -15.5421 0.320 -0.035 0.035 0.026 0.0101 0.089 0.067 2023 2 27 60002 -42.777 310.760 -15.6050 0.325 -0.020 0.034 0.026 0.0099 0.089 0.069 2023 2 28 60003 -44.051 313.293 -15.5019 0.331 -0.004 0.034 0.026 0.0099 0.090 0.072 2023 3 1 60004 -45.086 316.379 -15.2786 0.334 0.059 0.033 0.026 0.0098 0.090 0.073 Preliminary extension 2023 3 2 60005 -46.113 318.791 -15.0818 0.336 0.134 0.033 0.026 0.0114 0.090 0.074 2023 3 3 60006 -46.687 321.104 -14.8373 0.338 0.209 0.034 0.026 0.0112 0.090 0.075 2023 3 4 60007 -46.997 323.814 -14.6785 0.341 0.179 0.034 0.026 0.0112 0.090 0.075 2023 3 5 60008 -46.663 326.595 -14.6745 0.343 0.108 0.034 0.026 0.0112 0.090 0.074 2023 3 6 60009 -45.683 329.781 -14.9014 0.346 0.038 0.034 0.026 0.0112 0.091 0.074 2023 3 7 60010 -44.609 333.339 -15.3636 0.348 -0.032 0.034 0.026 0.0111 0.091 0.073 2023 3 8 60011 -43.526 336.657 -16.0113 0.345 -0.048 0.034 0.026 0.0111 0.091 0.072 2023 3 9 60012 -42.336 339.860 -16.7877 0.340 -0.050 0.034 0.026 0.0110 0.091 0.071 2023 3 10 60013 -41.249 343.113 -17.6141 0.335 -0.052 0.033 0.026 0.0110 0.091 0.069 2023 3 11 60014 -40.684 346.472 -18.3979 0.344 -0.055 0.033 0.026 0.0111 0.091 0.070 2023 3 12 60015 -40.566 349.535 -19.0792 0.358 -0.059 0.033 0.026 0.0111 0.092 0.072 2023 3 13 60016 -40.063 352.544 -19.5906 0.372 -0.063 0.033 0.026 0.0112 0.092 0.073 2023 3 14 60017 -39.649 355.961 -19.9080 0.385 -0.067 0.033 0.026 0.0113 0.093 0.075 2023 3 15 60018 -39.626 359.509 -20.1003 0.417 -0.045 0.033 0.026 0.0114 0.093 0.078 2023 3 16 60019 -39.845 362.327 -20.0746 0.452 -0.016 0.034 0.026 0.0116 0.094 0.082 2023 3 17 60020 -39.738 364.661 -20.0493 0.217 -0.203 0.034 0.026 0.0118 0.500 0.500 2023 3 18 60021 -39.088 366.859 -20.1217 0.212 -0.203 0.034 0.026 0.0120 0.500 0.500 2023 3 19 60022 -38.127 368.975 -20.4786 0.204 -0.203 0.034 0.026 0.0122 0.500 0.500 2023 3 20 60023 -36.934 371.215 -21.1297 0.194 -0.203 0.034 0.026 0.0124 0.500 0.500 2023 3 21 60024 -35.512 373.888 -21.9834 0.185 -0.202 0.034 0.027 0.0126 0.500 0.500 2023 3 22 60025 -33.907 377.057 -22.9512 0.179 -0.201 0.035 0.027 0.0127 0.500 0.500 2023 3 23 60026 -32.485 380.259 -23.8787 0.178 -0.197 0.035 0.027 0.0128 0.500 0.500 2023 3 24 60027 -31.170 383.291 -24.6870 0.182 -0.191 0.035 0.027 0.0129 0.500 0.500 2023 3 25 60028 -29.870 386.438 -25.2249 0.189 -0.183 0.036 0.028 0.0131 0.500 0.500 2023 3 26 60029 -28.420 389.511 -25.4307 0.199 -0.176 0.036 0.028 0.0132 0.500 0.500 2023 3 27 60030 -26.574 392.684 -25.3896 0.210 -0.172 0.037 0.029 0.0134 0.500 0.500 2023 3 28 60031 -24.687 395.515 -25.1786 0.221 -0.171 0.038 0.030 0.0136 0.500 0.500 2023 3 29 60032 -22.968 397.879 -24.8860 0.233 -0.171 0.039 0.031 0.0139 0.500 0.500 2023 3 30 60033 -21.715 400.039 -24.5918 0.243 -0.170 0.040 0.032 0.0142 0.500 0.500 2023 3 31 60034 -20.349 402.176 -24.3812 0.249 -0.168 0.042 0.034 0.0146 0.500 0.500 2023 4 1 60035 -18.918 404.498 -24.3332 0.246 -0.165 0.044 0.035 0.0151 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 2 2 59977 -110.219 -6.262 0.226 0.108 2023 2 3 59978 -109.978 -6.426 0.229 0.109 2023 2 4 59979 -109.861 -6.529 0.229 0.108 2023 2 5 59980 -109.870 -6.457 0.229 0.107 2023 2 6 59981 -109.866 -6.252 0.229 0.105 2023 2 7 59982 -109.747 -6.070 0.229 0.104 2023 2 8 59983 -109.435 -5.978 0.229 0.103 2023 2 9 59984 -109.132 -5.933 0.229 0.102 2023 2 10 59985 -108.968 -5.888 0.229 0.101 2023 2 11 59986 -109.040 -5.942 0.229 0.099 2023 2 12 59987 -109.260 -6.133 0.229 0.097 2023 2 13 59988 -109.473 -6.379 0.229 0.095 2023 2 14 59989 -109.625 -6.523 0.229 0.093 2023 2 15 59990 -109.980 -6.504 0.229 0.090 2023 2 16 59991 -110.553 -6.554 0.226 0.087 2023 2 17 59992 -111.072 -6.818 0.226 0.085 2023 2 18 59993 -110.935 -7.143 0.226 0.081 2023 2 19 59994 -110.257 -7.216 0.226 0.078 2023 2 20 59995 -109.509 -7.029 0.224 0.074 2023 2 21 59996 -109.019 -6.868 0.224 0.072 2023 2 22 59997 -108.925 -6.815 0.224 0.069 2023 2 23 59998 -109.077 -6.785 0.224 0.066 2023 2 24 59999 -109.413 -6.693 0.221 0.064 2023 2 25 60000 -109.790 -6.690 0.224 0.065 2023 2 26 60001 -110.020 -6.905 0.224 0.067 2023 2 27 60002 -110.045 -7.236 0.224 0.069 2023 2 28 60003 -109.938 -7.454 0.226 0.072 2023 3 1 60004 -109.729 -7.431 0.226 0.073 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 2 2 59977 -0.7560 0.0087 15.04106731028 0.00000000151 2023 2 3 59978 -0.7209 0.0087 15.04106730417 0.00000000151 2023 2 4 59979 -0.6066 0.0087 15.04106728427 0.00000000151 2023 2 5 59980 -0.4718 0.0085 15.04106726080 0.00000000148 2023 2 6 59981 -0.3012 0.0085 15.04106723111 0.00000000148 2023 2 7 59982 -0.1313 0.0085 15.04106720153 0.00000000148 2023 2 8 59983 0.0013 0.0085 15.04106717844 0.00000000148 2023 2 9 59984 0.1368 0.0085 15.04106715486 0.00000000148 2023 2 10 59985 0.2759 0.0084 15.04106713064 0.00000000146 2023 2 11 59986 0.3390 0.0084 15.04106711966 0.00000000146 2023 2 12 59987 0.2951 0.0084 15.04106712730 0.00000000146 2023 2 13 59988 0.1665 0.0084 15.04106714968 0.00000000146 2023 2 14 59989 -0.0381 0.0084 15.04106718530 0.00000000146 2023 2 15 59990 -0.2153 0.0083 15.04106721615 0.00000000144 2023 2 16 59991 -0.3515 0.0083 15.04106723986 0.00000000144 2023 2 17 59992 -0.3759 0.0083 15.04106724411 0.00000000144 2023 2 18 59993 -0.2020 0.0082 15.04106721384 0.00000000143 2023 2 19 59994 0.0889 0.0082 15.04106716319 0.00000000143 2023 2 20 59995 0.4168 0.0073 15.04106710611 0.00000000127 2023 2 21 59996 0.6825 0.0082 15.04106705986 0.00000000143 2023 2 22 59997 0.8144 0.0082 15.04106703689 0.00000000143 2023 2 23 59998 0.7900 0.0082 15.04106704114 0.00000000143 2023 2 24 59999 0.6943 0.0081 15.04106705780 0.00000000141 2023 2 25 60000 0.5179 0.0081 15.04106708851 0.00000000141 2023 2 26 60001 0.2512 0.0081 15.04106713494 0.00000000141 2023 2 27 60002 -0.0231 0.0081 15.04106718269 0.00000000141 2023 2 28 60003 -0.1828 0.0081 15.04106721049 0.00000000141 2023 3 1 60004 -0.2371 0.0080 15.04106721995 0.00000000139 4 - INFORMATION ON TIME SCALES TAI - UTC = 37 s. during period [59977-60004] No leap second introduced during period [59977-60004] 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 bkg2020a.eoxy 62 76 3 - 44 41 9 59977.25 to 60003.21 80 120 13 - 54 35 GSFC gsf2020a.eoxy 56 58 3 8 39 41 9 59977.25 to 60003.21 150 114 11 26 24 53 IAA iaa2021a.eops 97 124 6 - 81 80 5 59978.27 to 60003.21 307 340 25 - 290 324 USNO usn2022d.eoxy 32 37 1 - 36 35 8 59978.27 to 60003.21 68 70 16 - 37 20 IVS * ivs20r1X.eops 31 36 1 - 32 32 7 59978.28 to 60003.21 89 70 11 - 9 8 VLBI Intensive GSI * gsiint2c.eopi - - 11 - - - 8 59979.33 to 60001.33 - - 30 - - - BKG * bkg2023.eopi - - 10 - - - 44 59977.79 to 60003.79 - - 21 - - - GSFC * gsf2020a.eopi - - 21 - - - 44 59977.79 to 60003.79 - - 106 - - - IAA * iaa2021a.eopi - - 38 - - - 46 59977.79 to 60003.79 - - 98 - - - USNO * usn2022d.eopi - - 14 - - - 38 59977.79 to 60003.79 - - 24 - - - GPS CODE COD0OPSFIN 3 3 - 0 - - 27 59977.50 to 60003.50 21 22 - 15 - - JPL JPL0OPSRAP 10 11 - 7 - - 27 59977.50 to 60003.50 56 30 - 20 - - GFZ GFZ0OPSFIN 6 5 - 1 - - 27 59977.50 to 60003.50 40 37 - 17 - - ESA ESA0OPSFIN 5 6 - 3 - - 27 59977.50 to 60003.50 30 31 - 15 - - SIO SIO0OPSFIN 21 21 - 10 - - 27 59977.50 to 60003.50 39 36 - 22 - - EMR EMR0OPSRAP 4 4 - 1 - - 27 59977.50 to 60003.50 60 51 - 15 - - IAA gnss.res 0 0 - 0 - - 22 59977.50 to 60003.50 65 67 - 22 - - GRGS GRG0OPSFIN 263 263 - 0 - - 27 59977.50 to 60003.50 35 34 - 17 - - ASI asi*.erp 30 28 - 0 - - 9 59994.50 to 60003.50 12851 160 - 135 - - MIT MIT0OPSFIN 10 10 - 1 - - 27 59977.50 to 60003.50 39 36 - 21 - - IGR * IGS0OPSRAP 15 11 - 3 - - 27 59977.50 to 60003.50 31 28 - 14 - - IGS * IGS0OPSFIN 10 12 - 2 - - 27 59977.50 to 60003.50 24 24 - 13 - - SLR MCC tg*.02 203 265 - 32 - - 28 59977.00 to 60004.00 137 162 - 70 - - IAA slr_v.dat 80 94 - 5 - - 26 59977.00 to 60004.00 298 280 - 21 - - ASI asi.*.eops 100 112 - 23 - - 27 59977.50 to 60003.50 274 430 - 95 - - ILRS * ilrsa.eop 60 64 - 10 - - 27 59977.50 to 60003.50 171 241 - 37 - - BULLETIN A NEOS mark3.out 26 26 6 - - - 28 59977.00 to 60004.00 55 52 10 - - - To unsubscribe : http://hpiers.obspm.fr/eop-pc/products/bulletins/bulletin_registration.html