BULLETIN B 404 4 October 2021 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 0.025 0.018 0.0112 0.031 0.070 2021 8 2 59428 247.724 379.020 -142.6563 0.264 -0.127 0.027 0.020 0.0131 0.070 0.078 2021 8 3 59429 248.665 377.672 -141.8281 0.305 -0.149 0.027 0.020 0.0125 0.070 0.078 2021 8 4 59430 249.247 376.225 -140.8819 0.295 -0.110 0.027 0.020 0.0134 0.071 0.078 2021 8 5 59431 250.318 374.716 -139.8588 0.272 -0.054 0.027 0.020 0.0130 0.071 0.078 2021 8 6 59432 251.557 373.439 -138.8293 0.256 -0.038 0.027 0.020 0.0125 0.072 0.077 2021 8 7 59433 252.384 372.189 -137.7997 0.244 -0.034 0.027 0.020 0.0125 0.073 0.076 2021 8 8 59434 252.618 370.959 -136.7543 0.231 -0.031 0.027 0.020 0.0124 0.073 0.075 2021 8 9 59435 251.958 369.547 -135.8220 0.219 -0.028 0.028 0.020 0.0129 0.074 0.074 2021 8 10 59436 250.843 367.504 -135.0686 0.206 -0.025 0.028 0.020 0.0121 0.074 0.073 2021 8 11 59437 250.176 365.255 -134.5085 0.194 -0.022 0.028 0.020 0.0115 0.075 0.072 2021 8 12 59438 249.897 363.348 -134.1190 0.182 -0.080 0.028 0.020 0.0111 0.075 0.071 2021 8 13 59439 249.586 361.519 -133.8317 0.169 -0.157 0.027 0.019 0.0108 0.076 0.071 2021 8 14 59440 249.168 359.749 -133.5458 0.169 -0.170 0.027 0.019 0.0107 0.076 0.069 2021 8 15 59441 248.726 358.103 -133.1531 0.172 -0.160 0.027 0.019 0.0105 0.077 0.067 2021 8 16 59442 248.321 356.538 -132.5675 0.176 -0.150 0.026 0.019 0.0105 0.077 0.065 2021 8 17 59443 248.130 354.895 -131.7488 0.179 -0.140 0.026 0.019 0.0103 0.078 0.064 2021 8 18 59444 248.008 353.279 -130.7185 0.183 -0.131 0.026 0.019 0.0102 0.078 0.062 2021 8 19 59445 247.978 351.653 -129.5488 0.203 -0.126 0.026 0.018 0.0100 0.079 0.063 2021 8 20 59446 247.731 350.108 -128.3563 0.229 -0.124 0.026 0.018 0.0098 0.080 0.065 2021 8 21 59447 247.290 348.276 -127.2649 0.268 -0.114 0.025 0.018 0.0099 0.081 0.066 2021 8 22 59448 246.822 346.558 -126.3384 0.313 -0.103 0.025 0.018 0.0099 0.082 0.067 2021 8 23 59449 246.343 344.554 -125.5763 0.358 -0.091 0.025 0.018 0.0095 0.082 0.068 2021 8 24 59450 245.986 342.232 -124.9636 0.402 -0.080 0.024 0.018 0.0102 0.083 0.069 2021 8 25 59451 246.006 340.077 -124.4735 0.361 -0.093 0.024 0.018 0.0108 0.084 0.070 2021 8 26 59452 246.029 338.309 -124.0162 0.297 -0.112 0.024 0.017 0.0110 0.085 0.071 2021 8 27 59453 246.039 336.463 -123.5117 0.233 -0.131 0.024 0.017 0.0108 0.085 0.072 2021 8 28 59454 246.083 334.712 -122.8899 0.223 -0.091 0.024 0.017 0.0110 0.086 0.072 2021 8 29 59455 246.022 333.214 -122.1387 0.231 -0.031 0.024 0.017 0.0112 0.086 0.072 2021 8 30 59456 245.834 331.664 -121.2791 0.239 0.029 0.024 0.017 0.0108 0.087 0.071 2021 8 31 59457 245.060 329.881 -120.3267 0.247 0.089 0.024 0.017 0.0109 0.088 0.071 2021 9 1 59458 244.291 327.776 -119.3071 0.254 0.051 0.024 0.017 0.0105 0.088 0.070 Preliminary extension 2021 9 2 59459 243.859 325.972 -118.2574 0.260 -0.013 0.023 0.017 0.0106 0.089 0.069 2021 9 3 59460 243.838 324.135 -117.2280 0.266 -0.077 0.023 0.017 0.0105 0.089 0.068 2021 9 4 59461 243.924 322.819 -116.2657 0.233 -0.087 0.023 0.017 0.0106 0.090 0.068 2021 9 5 59462 243.284 321.221 -115.4565 0.188 -0.078 0.023 0.017 0.0107 0.090 0.068 2021 9 6 59463 242.292 319.286 -114.9182 0.142 -0.069 0.024 0.017 0.0108 0.091 0.068 2021 9 7 59464 241.081 317.266 -114.5867 0.097 -0.060 0.024 0.017 0.0109 0.092 0.068 2021 9 8 59465 240.172 315.382 -114.4393 0.051 -0.051 0.024 0.017 0.0109 0.093 0.068 2021 9 9 59466 239.505 313.682 -114.4502 0.150 -0.068 0.023 0.017 0.0109 0.093 0.067 2021 9 10 59467 239.061 311.944 -114.5075 0.284 -0.092 0.023 0.017 0.0110 0.094 0.067 2021 9 11 59468 238.898 310.400 -114.4759 0.306 -0.100 0.023 0.017 0.0112 0.095 0.067 2021 9 12 59469 239.061 309.176 -114.3186 0.286 -0.102 0.023 0.017 0.0114 0.096 0.068 2021 9 13 59470 239.056 308.241 -113.9056 0.266 -0.103 0.023 0.017 0.0115 0.098 0.069 2021 9 14 59471 238.138 306.836 -113.2522 0.246 -0.105 0.023 0.017 0.0117 0.099 0.070 2021 9 15 59472 236.851 305.427 -112.4473 0.290 -0.126 0.023 0.018 0.0120 0.101 0.073 2021 9 16 59473 235.178 304.217 -111.5907 0.351 -0.151 0.024 0.018 0.0124 0.103 0.077 2021 9 17 59474 234.051 302.474 -110.7873 0.413 -0.176 0.024 0.018 0.0127 0.105 0.081 2021 9 18 59475 233.270 300.665 -110.1646 0.421 -0.177 0.024 0.019 0.0132 0.500 0.500 2021 9 19 59476 231.900 298.972 -109.7638 0.388 -0.158 0.024 0.019 0.0137 0.500 0.500 2021 9 20 59477 230.859 297.087 -109.5394 0.334 -0.130 0.025 0.019 0.0142 0.500 0.500 2021 9 21 59478 230.381 295.182 -109.3991 0.290 -0.106 0.025 0.020 0.0148 0.500 0.500 2021 9 22 59479 230.280 293.428 -109.3093 0.276 -0.096 0.025 0.020 0.0153 0.500 0.500 2021 9 23 59480 229.743 291.937 -109.2795 0.290 -0.101 0.026 0.021 0.0159 0.500 0.500 2021 9 24 59481 229.058 290.751 -109.1185 0.316 -0.113 0.027 0.021 0.0165 0.500 0.500 2021 9 25 59482 228.181 289.722 -108.8703 0.331 -0.121 0.028 0.022 0.0171 0.500 0.500 2021 9 26 59483 226.766 288.622 -108.4785 0.329 -0.121 0.028 0.022 0.0176 0.500 0.500 2021 9 27 59484 224.977 286.915 -108.0017 0.317 -0.115 0.029 0.023 0.0181 0.500 0.500 2021 9 28 59485 223.245 285.098 -107.4034 0.312 -0.109 0.031 0.024 0.0186 0.500 0.500 2021 9 29 59486 221.631 283.265 -106.6907 0.322 -0.109 0.032 0.024 0.0192 0.500 0.500 2021 9 30 59487 220.660 281.292 -105.8868 0.338 -0.115 0.033 0.025 0.0197 0.500 0.500 2021 10 1 59488 219.882 279.825 -105.1716 0.346 -0.122 0.035 0.026 0.0203 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 2021 8 2 59428 -116.864 -9.419 0.176 0.078 2021 8 3 59429 -116.928 -9.418 0.176 0.078 2021 8 4 59430 -117.087 -9.488 0.178 0.078 2021 8 5 59431 -117.212 -9.692 0.178 0.078 2021 8 6 59432 -117.228 -9.944 0.181 0.077 2021 8 7 59433 -117.131 -10.037 0.184 0.076 2021 8 8 59434 -116.976 -9.913 0.184 0.075 2021 8 9 59435 -116.861 -9.698 0.186 0.074 2021 8 10 59436 -116.860 -9.570 0.186 0.073 2021 8 11 59437 -116.935 -9.605 0.189 0.072 2021 8 12 59438 -117.018 -9.784 0.189 0.071 2021 8 13 59439 -117.129 -9.917 0.191 0.071 2021 8 14 59440 -117.340 -9.843 0.191 0.069 2021 8 15 59441 -117.733 -9.659 0.194 0.067 2021 8 16 59442 -118.199 -9.514 0.194 0.065 2021 8 17 59443 -118.520 -9.488 0.196 0.064 2021 8 18 59444 -118.546 -9.545 0.196 0.062 2021 8 19 59445 -118.297 -9.587 0.199 0.063 2021 8 20 59446 -117.988 -9.566 0.201 0.065 2021 8 21 59447 -117.743 -9.514 0.204 0.066 2021 8 22 59448 -117.577 -9.494 0.206 0.067 2021 8 23 59449 -117.443 -9.485 0.206 0.068 2021 8 24 59450 -117.347 -9.416 0.209 0.069 2021 8 25 59451 -117.579 -9.295 0.211 0.070 2021 8 26 59452 -118.019 -9.189 0.214 0.071 2021 8 27 59453 -118.513 -9.184 0.214 0.072 2021 8 28 59454 -118.761 -9.205 0.216 0.072 2021 8 29 59455 -118.783 -9.190 0.216 0.072 2021 8 30 59456 -118.708 -9.104 0.219 0.071 2021 8 31 59457 -118.658 -9.011 0.221 0.071 2021 9 1 59458 -118.650 -9.123 0.221 0.070 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 2021 8 2 59428 -0.7555 0.0071 15.04106731019 0.00000000124 2021 8 3 59429 -0.8856 0.0071 15.04106733284 0.00000000124 2021 8 4 59430 -0.9926 0.0071 15.04106735147 0.00000000124 2021 8 5 59431 -1.0475 0.0070 15.04106736103 0.00000000122 2021 8 6 59432 -1.0580 0.0070 15.04106736285 0.00000000122 2021 8 7 59433 -1.0329 0.0071 15.04106735848 0.00000000124 2021 8 8 59434 -0.9699 0.0070 15.04106734752 0.00000000122 2021 8 9 59435 -0.8438 0.0070 15.04106732556 0.00000000122 2021 8 10 59436 -0.6799 0.0071 15.04106729703 0.00000000124 2021 8 11 59437 -0.4603 0.0071 15.04106725880 0.00000000124 2021 8 12 59438 -0.3252 0.0071 15.04106723528 0.00000000124 2021 8 13 59439 -0.3000 0.0070 15.04106723090 0.00000000122 2021 8 14 59440 -0.3549 0.0070 15.04106724045 0.00000000122 2021 8 15 59441 -0.4593 0.0071 15.04106725863 0.00000000124 2021 8 16 59442 -0.6686 0.0071 15.04106729506 0.00000000124 2021 8 17 59443 -0.9228 0.0071 15.04106733932 0.00000000124 2021 8 18 59444 -1.0982 0.0071 15.04106736985 0.00000000124 2021 8 19 59445 -1.1741 0.0071 15.04106738307 0.00000000124 2021 8 20 59446 -1.1739 0.0072 15.04106738303 0.00000000125 2021 8 21 59447 -1.0243 0.0072 15.04106735699 0.00000000125 2021 8 22 59448 -0.8459 0.0072 15.04106732593 0.00000000125 2021 8 23 59449 -0.6538 0.0071 15.04106729249 0.00000000124 2021 8 24 59450 -0.5235 0.0071 15.04106726980 0.00000000124 2021 8 25 59451 -0.4466 0.0071 15.04106725642 0.00000000124 2021 8 26 59452 -0.4798 0.0070 15.04106726220 0.00000000122 2021 8 27 59453 -0.5674 0.0070 15.04106727745 0.00000000122 2021 8 28 59454 -0.6892 0.0070 15.04106729865 0.00000000122 2021 8 29 59455 -0.8198 0.0070 15.04106732139 0.00000000122 2021 8 30 59456 -0.8920 0.0070 15.04106733396 0.00000000122 2021 8 31 59457 -0.9814 0.0070 15.04106734952 0.00000000122 2021 9 1 59458 -1.0322 0.0070 15.04106735836 0.00000000122 4 - INFORMATION ON TIME SCALES TAI - UTC = 37 s. during period [59428-59458] No leap second introduced during period [59428-59458] 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 CGS cgs2007a.eops 821 1596 44 - 0 0 9 59429.12 to 59457.24 280 1752 44 - 399 201 BKG bkg00020a.eops 60 59 2 - 14 44 10 59429.21 to 59457.21 98 98 14 - 47 25 GSFC gsf2020a.eoxy 57 46 2 6 14 42 10 59429.21 to 59457.21 128 85 12 17 43 46 IAA iaa2021a.eops 43 42 2 - 12 31 9 59429.21 to 59457.21 172 204 15 - 75 86 USNO usn2021b.eoxy 40 37 1 - 15 41 9 59429.21 to 59457.21 80 52 11 - 39 30 IVS * ivs20r1X.eops 20 20 1 - 7 19 9 59429.21 to 59457.21 90 74 11 - 10 9 VLBI Intensive GSI * gsiint2c.eopi - - 16 - - - 7 59433.33 to 59455.33 - - 34 - - - BKG * bkg2020.eopi - - 14 - - - 31 59428.31 to 59457.79 - - 28 - - - GSFC * gsf2020a.eopi - - 19 - - - 30 59428.31 to 59456.79 - - 121 - - - IAA * iaa2021a.eopi - - 35 - - - 40 59428.31 to 59457.79 - - 35 - - - USNO * usn2021b.eopi - - 20 - - - 31 59428.31 to 59457.79 - - 95 - - - GPS CODE COD*ERP_R 5 5 - 0 - - 30 59428.50 to 59457.50 20 21 - 14 - - JPL jpl*.erp 10 11 - 6 - - 30 59428.50 to 59457.50 24 30 - 21 - - GFZ gfz*.erp 7 8 - 1 - - 30 59428.50 to 59457.50 27 28 - 14 - - ESOC esa*.erp 7 9 - 3 - - 30 59428.50 to 59457.50 24 25 - 12 - - SIO sio*.erp siu*.erp 30 29 - 5 - - 30 59428.50 to 59457.50 25 26 - 13 - - EMR emr*.erp 4 3 - 0 - - 30 59428.50 to 59457.50 57 35 - 16 - - IAA gnss.res 0 0 - 0 - - 30 59428.50 to 59457.50 45 80 - 24 - - GRGS grg*.erp 229 229 - 0 - - 30 59428.50 to 59457.50 20 19 - 12 - - ASI asi*.erp 9 9 - 0 - - 23 59428.50 to 59457.50 44 37 - 70 - - MIT mit*.erp 12 12 - 2 - - 30 59428.50 to 59457.50 28 25 - 14 - - IGR * igs96p02.erp 11 9 - 2 - - 30 59428.50 to 59457.50 18 21 - 11 - - IGS * igs00p03.erp 3 3 - 0 - - 30 59428.50 to 59457.50 20 21 - 13 - - SLR MCC tg*.02 217 251 - 36 - - 31 59428.00 to 59458.00 134 167 - 255 - - IAA slr_v.dat 74 95 - 5 - - 30 59428.00 to 59458.00 203 368 - 26 - - ASI slr_oca*.eop 80 102 - 20 - - 30 59428.50 to 59457.50 200 304 - 71 - - ILRS * ilrsa.eop 48 59 - 10 - - 30 59428.50 to 59457.50 214 212 - 39 - - BULLETIN A NEOS mark3.out 17 16 3 - - - 31 59428.00 to 59458.00 38 29 17 - - - To unsubscribe : http://hpiers.obspm.fr/eop-pc/products/bulletins/bulletin_registration.html