BULLETIN B 427 4 September 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 0.055 0.050 0.0250 0.061 0.052 2023 7 2 60127 187.226 507.848 -35.3981 0.349 -0.097 0.054 0.048 0.0605 0.146 0.120 2023 7 3 60128 190.492 507.593 -34.4896 0.334 -0.133 0.056 0.051 0.0394 0.127 0.100 2023 7 4 60129 193.198 507.334 -33.5318 0.327 -0.180 0.057 0.052 0.0942 0.114 0.085 2023 7 5 60130 195.908 507.073 -32.6419 0.339 -0.245 0.058 0.051 0.0753 0.105 0.080 2023 7 6 60131 198.426 506.374 -31.9144 0.363 -0.305 0.057 0.052 0.0551 0.094 0.075 2023 7 7 60132 201.220 505.514 -31.4343 0.391 -0.342 0.055 0.055 0.0436 0.086 0.071 2023 7 8 60133 204.156 504.535 -31.1542 0.428 -0.331 0.053 0.052 0.0252 0.079 0.072 2023 7 9 60134 207.001 503.185 -30.9623 0.455 -0.284 0.052 0.052 0.0278 0.071 0.075 2023 7 10 60135 209.533 502.013 -30.6936 0.436 -0.202 0.053 0.052 0.0244 0.064 0.068 2023 7 11 60136 212.151 500.923 -30.2988 0.386 -0.113 0.053 0.053 0.0200 0.055 0.055 2023 7 12 60137 214.585 499.885 -29.7092 0.336 -0.090 0.053 0.054 0.0182 0.053 0.051 2023 7 13 60138 216.926 498.812 -28.8524 0.294 -0.114 0.055 0.052 0.0170 0.054 0.049 2023 7 14 60139 219.379 497.583 -27.7983 0.267 -0.157 0.053 0.051 0.0162 0.055 0.047 2023 7 15 60140 221.871 496.538 -26.5972 0.294 -0.163 0.054 0.050 0.0159 0.054 0.046 2023 7 16 60141 224.374 495.464 -25.3009 0.353 -0.147 0.053 0.049 0.0156 0.052 0.044 2023 7 17 60142 226.953 494.546 -24.0270 0.418 -0.131 0.053 0.049 0.0148 0.049 0.041 2023 7 18 60143 228.983 493.824 -22.8538 0.473 -0.120 0.053 0.050 0.0143 0.048 0.039 2023 7 19 60144 230.996 493.045 -21.8364 0.476 -0.142 0.054 0.052 0.0128 0.045 0.037 2023 7 20 60145 233.340 492.282 -21.0160 0.455 -0.174 0.055 0.053 0.0123 0.040 0.035 2023 7 21 60146 235.893 491.075 -20.4242 0.425 -0.205 0.055 0.051 0.0122 0.037 0.032 2023 7 22 60147 238.218 489.978 -20.0295 0.405 -0.212 0.053 0.049 0.0129 0.036 0.032 2023 7 23 60148 240.409 488.602 -19.7499 0.389 -0.202 0.058 0.048 0.0137 0.036 0.032 2023 7 24 60149 242.675 487.119 -19.5468 0.375 -0.186 0.059 0.049 0.0135 0.037 0.033 2023 7 25 60150 244.998 485.494 -19.3720 0.360 -0.165 0.063 0.049 0.0128 0.037 0.033 2023 7 26 60151 247.369 483.986 -19.1211 0.339 -0.141 0.058 0.047 0.0133 0.040 0.036 2023 7 27 60152 249.864 482.311 -18.7234 0.319 -0.121 0.057 0.045 0.0136 0.045 0.040 2023 7 28 60153 252.271 480.832 -18.1468 0.305 -0.112 0.055 0.047 0.0149 0.050 0.044 2023 7 29 60154 254.520 479.116 -17.4005 0.314 -0.144 0.053 0.048 0.0159 0.049 0.044 2023 7 30 60155 256.321 477.330 -16.5264 0.337 -0.199 0.052 0.051 0.0168 0.047 0.042 2023 7 31 60156 257.717 475.332 -15.6145 0.364 -0.253 0.055 0.051 0.0178 0.044 0.040 2023 8 1 60157 259.552 473.316 -14.8009 0.391 -0.293 0.058 0.053 0.0146 0.043 0.038 Preliminary extension 2023 8 2 60158 261.538 471.686 -14.1968 0.409 -0.273 0.061 0.052 0.0164 0.044 0.039 2023 8 3 60159 263.444 470.105 -13.8930 0.416 -0.229 0.063 0.053 0.0194 0.047 0.041 2023 8 4 60160 265.536 468.247 -13.8656 0.411 -0.179 0.065 0.053 0.0227 0.050 0.044 2023 8 5 60161 267.928 466.409 -14.0119 0.365 -0.153 0.064 0.053 0.0267 0.050 0.043 2023 8 6 60162 270.490 464.877 -14.1463 0.298 -0.142 0.056 0.048 0.0302 0.050 0.043 2023 8 7 60163 272.863 463.575 -14.1362 0.235 -0.139 0.051 0.045 0.0272 0.050 0.041 2023 8 8 60164 274.693 462.235 -13.9071 0.190 -0.141 0.048 0.042 0.0218 0.050 0.041 2023 8 9 60165 276.327 460.628 -13.4294 0.215 -0.150 0.046 0.041 0.0190 0.056 0.046 2023 8 10 60166 277.807 458.796 -12.7110 0.272 -0.158 0.046 0.041 0.0174 0.065 0.054 2023 8 11 60167 278.982 456.498 -11.7415 0.336 -0.156 0.046 0.041 0.0165 0.073 0.061 2023 8 12 60168 279.989 454.735 -10.6061 0.463 -0.087 0.047 0.042 0.0170 0.095 0.079 2023 8 13 60169 280.784 452.599 -9.4139 0.579 0.007 0.048 0.043 0.0187 0.130 0.105 2023 8 14 60170 281.827 450.685 -8.2521 0.598 0.077 0.049 0.045 0.0218 0.158 0.126 2023 8 15 60171 282.751 448.894 -7.1954 0.461 0.094 0.050 0.046 0.0262 0.173 0.138 2023 8 16 60172 283.592 447.043 -6.3159 0.269 -0.151 0.051 0.047 0.0298 0.500 0.500 2023 8 17 60173 284.147 445.185 -5.6265 0.264 -0.148 0.053 0.048 0.0338 0.500 0.500 2023 8 18 60174 285.208 442.912 -5.0770 0.256 -0.146 0.054 0.049 0.0332 0.500 0.500 2023 8 19 60175 286.577 440.682 -4.6413 0.247 -0.146 0.056 0.048 0.0331 0.500 0.500 2023 8 20 60176 287.747 438.119 -4.2620 0.239 -0.148 0.058 0.048 0.0379 0.500 0.500 2023 8 21 60177 288.674 435.476 -3.8660 0.234 -0.149 0.060 0.048 0.0499 0.500 0.500 2023 8 22 60178 289.764 432.358 -3.4137 0.230 -0.148 0.061 0.048 0.0645 0.500 0.500 2023 8 23 60179 291.361 429.810 -2.8515 0.226 -0.147 0.062 0.048 0.0740 0.500 0.500 2023 8 24 60180 292.564 427.320 -2.1507 0.224 -0.146 0.062 0.049 0.0674 0.500 0.500 2023 8 25 60181 294.159 424.744 -1.3057 0.225 -0.148 0.062 0.050 0.0573 0.500 0.500 2023 8 26 60182 296.055 422.684 -0.3324 0.230 -0.155 0.063 0.051 0.0494 0.500 0.500 2023 8 27 60183 298.313 420.659 0.6863 0.236 -0.165 0.063 0.052 0.0487 0.500 0.500 2023 8 28 60184 300.348 418.956 1.6418 0.241 -0.175 0.062 0.053 0.0517 0.500 0.500 2023 8 29 60185 302.068 417.633 2.3958 0.240 -0.180 0.062 0.055 0.0490 0.500 0.500 2023 8 30 60186 303.514 416.401 2.7742 0.230 -0.181 0.064 0.058 0.0464 0.500 0.500 2023 8 31 60187 304.448 414.973 2.7550 0.213 -0.176 0.068 0.063 0.0498 0.500 0.500 2023 9 1 60188 304.727 413.219 2.4601 0.195 -0.167 0.075 0.070 0.0600 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 7 2 60127 -113.199 -9.303 0.366 0.120 2023 7 3 60128 -113.166 -9.608 0.320 0.100 2023 7 4 60129 -112.851 -9.818 0.287 0.085 2023 7 5 60130 -112.408 -9.794 0.264 0.080 2023 7 6 60131 -112.214 -9.638 0.237 0.075 2023 7 7 60132 -112.403 -9.552 0.216 0.071 2023 7 8 60133 -112.760 -9.535 0.198 0.072 2023 7 9 60134 -113.071 -9.471 0.179 0.075 2023 7 10 60135 -113.323 -9.301 0.161 0.068 2023 7 11 60136 -113.566 -9.109 0.138 0.055 2023 7 12 60137 -113.875 -9.024 0.134 0.051 2023 7 13 60138 -114.299 -9.039 0.137 0.049 2023 7 14 60139 -114.717 -9.160 0.139 0.047 2023 7 15 60140 -114.866 -9.393 0.137 0.046 2023 7 16 60141 -114.764 -9.731 0.131 0.044 2023 7 17 60142 -114.584 -10.007 0.124 0.041 2023 7 18 60143 -114.472 -10.018 0.119 0.039 2023 7 19 60144 -114.568 -9.765 0.112 0.037 2023 7 20 60145 -114.761 -9.434 0.102 0.035 2023 7 21 60146 -114.934 -9.222 0.092 0.032 2023 7 22 60147 -114.946 -9.121 0.090 0.032 2023 7 23 60148 -114.802 -9.012 0.092 0.032 2023 7 24 60149 -114.739 -8.873 0.092 0.033 2023 7 25 60150 -115.090 -8.835 0.093 0.033 2023 7 26 60151 -115.939 -9.007 0.101 0.036 2023 7 27 60152 -116.894 -9.285 0.113 0.040 2023 7 28 60153 -117.493 -9.459 0.125 0.044 2023 7 29 60154 -117.597 -9.513 0.124 0.044 2023 7 30 60155 -117.387 -9.585 0.118 0.042 2023 7 31 60156 -116.980 -9.717 0.112 0.040 2023 8 1 60157 -116.465 -9.735 0.107 0.038 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 7 2 60127 -0.8316 0.0241 15.04106732344 0.00000000420 2023 7 3 60128 -0.9610 0.0239 15.04106734597 0.00000000416 2023 7 4 60129 -0.9460 0.0239 15.04106734336 0.00000000416 2023 7 5 60130 -0.8177 0.0231 15.04106732102 0.00000000402 2023 7 6 60131 -0.6116 0.0232 15.04106728514 0.00000000404 2023 7 7 60132 -0.3658 0.0230 15.04106724235 0.00000000400 2023 7 8 60133 -0.2083 0.0226 15.04106721493 0.00000000393 2023 7 9 60134 -0.2072 0.0233 15.04106721474 0.00000000406 2023 7 10 60135 -0.3264 0.0242 15.04106723549 0.00000000421 2023 7 11 60136 -0.4836 0.0245 15.04106726286 0.00000000427 2023 7 12 60137 -0.7161 0.0244 15.04106730333 0.00000000425 2023 7 13 60138 -0.9714 0.0256 15.04106734778 0.00000000446 2023 7 14 60139 -1.1411 0.0323 15.04106737732 0.00000000562 2023 7 15 60140 -1.2592 0.0302 15.04106739788 0.00000000526 2023 7 16 60141 -1.3057 0.0283 15.04106740597 0.00000000493 2023 7 17 60142 -1.2355 0.0273 15.04106739375 0.00000000475 2023 7 18 60143 -1.1031 0.0274 15.04106737071 0.00000000477 2023 7 19 60144 -0.9241 0.0262 15.04106733954 0.00000000456 2023 7 20 60145 -0.7087 0.0257 15.04106730205 0.00000000447 2023 7 21 60146 -0.4857 0.0254 15.04106726322 0.00000000442 2023 7 22 60147 -0.3219 0.0243 15.04106723471 0.00000000423 2023 7 23 60148 -0.2342 0.0233 15.04106721944 0.00000000406 2023 7 24 60149 -0.1810 0.0228 15.04106721018 0.00000000397 2023 7 25 60150 -0.1947 0.0227 15.04106721256 0.00000000395 2023 7 26 60151 -0.3134 0.0231 15.04106723323 0.00000000402 2023 7 27 60152 -0.4844 0.0235 15.04106726300 0.00000000409 2023 7 28 60153 -0.6677 0.0243 15.04106729491 0.00000000423 2023 7 29 60154 -0.8228 0.0251 15.04106732191 0.00000000437 2023 7 30 60155 -0.9135 0.0249 15.04106733770 0.00000000433 2023 7 31 60156 -0.8861 0.0249 15.04106733293 0.00000000433 2023 8 1 60157 -0.7225 0.0253 15.04106730445 0.00000000440 4 - INFORMATION ON TIME SCALES TAI - UTC = 37 s. during period [60127-60157] No leap second introduced during period [60127-60157] 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 77 164 7 - 50 54 11 60131.25 to 60153.27 92 146 23 - 57 109 GSFC gsf2023a.eoxy 62 79 5 16 45 46 12 60131.25 to 60153.27 79 151 24 15 61 83 USNO usn2023b.eoxy 51 37 3 - 45 38 3 60129.21 to 60136.21 96 76 38 - 58 32 IVS * ivs2023a.eoxy 80 55 5 - 35 32 8 60129.20 to 60153.27 92 86 19 - 4 7 VLBI Intensive GSI * gsiint2d.eopi - - 11 - - - 6 60133.33 to 60154.33 - - 19 - - - BKG * bkg2023.eopi - - 9 - - - 46 60127.33 to 60156.79 - - 36 - - - GSFC * gsf2023a.eopi - - 12 - - - 46 60127.33 to 60157.00 - - 34 - - - IAA * iaa2021a.eopi - - 33 - - - 56 60127.33 to 60156.79 - - 92 - - - USNO * usn2023b.eopi - - 10 - - - 40 60127.79 to 60152.00 - - 130 - - - GPS CODE COD0OPSFIN 3 3 - 0 - - 30 60127.50 to 60156.50 25 24 - 11 - - JPL JPL0OPSFIN 9 10 - 5 - - 30 60127.50 to 60156.50 36 40 - 18 - - GFZ GFZ0OPSFIN 4 4 - 1 - - 30 60127.50 to 60156.50 38 29 - 12 - - ESA ESA0OPSFIN 5 6 - 2 - - 30 60127.50 to 60156.50 35 22 - 10 - - SIO SIO0OPSFIN 24 23 - 10 - - 30 60127.50 to 60156.50 40 29 - 16 - - EMR EMR0OPSRAP 4 3 - 0 - - 30 60127.50 to 60156.50 59 57 - 15 - - IAA gnss.res 0 0 - 0 - - 30 60127.50 to 60156.50 50 62 - 15 - - GRGS GRG0OPSFIN 264 264 - 0 - - 30 60127.50 to 60156.50 25 23 - 12 - - ASI asi*.erp 9 9 - 0 - - 23 60127.50 to 60156.50 19 15 - 62 - - MIT MIT0OPSFIN 10 10 - 1 - - 30 60127.50 to 60156.50 42 30 - 13 - - IGR * IGS0OPSRAP 10 11 - 3 - - 30 60127.50 to 60156.50 28 21 - 16 - - IGS * IGS0OPSFIN 8 11 - 2 - - 30 60127.50 to 60156.50 28 21 - 10 - - SLR MCC tg*.02 218 243 - 49 - - 31 60127.00 to 60157.00 181 173 - 239 - - ASI asi2023a.eops 76 94 - 19 - - 10 60127.50 to 60136.50 187 245 - 73 - - ILRS * ilrsa.eop 56 70 - 11 - - 30 60127.50 to 60156.50 230 219 - 36 - - BULLETIN A NEOS mark3.out 11 16 10 - - - 31 60127.00 to 60157.00 23 29 27 - - - To unsubscribe : http://hpiers.obspm.fr/eop-pc/products/bulletins/bulletin_registration.html