BULLETIN B 399 3 May 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 0.022 0.017 0.0137 0.044 0.103 2021 3 2 59275 50.706 373.771 -170.3934 0.226 0.022 0.024 0.020 0.0127 0.105 0.129 2021 3 3 59276 50.584 375.262 -171.0261 0.212 0.040 0.024 0.020 0.0127 0.106 0.129 2021 3 4 59277 51.059 376.549 -171.5540 0.188 0.057 0.024 0.020 0.0134 0.106 0.130 2021 3 5 59278 52.201 377.870 -171.8838 0.164 0.073 0.024 0.020 0.0129 0.107 0.130 2021 3 6 59279 53.360 379.379 -171.9881 0.164 0.048 0.024 0.019 0.0129 0.107 0.129 2021 3 7 59280 54.561 380.833 -171.8731 0.173 0.007 0.024 0.019 0.0129 0.108 0.127 2021 3 8 59281 56.191 382.351 -171.6080 0.183 -0.033 0.024 0.019 0.0128 0.108 0.125 2021 3 9 59282 57.662 383.909 -171.3243 0.192 -0.074 0.024 0.019 0.0130 0.109 0.123 2021 3 10 59283 58.750 385.265 -171.0993 0.195 -0.074 0.023 0.018 0.0140 0.109 0.121 2021 3 11 59284 59.621 386.346 -171.0012 0.195 -0.063 0.023 0.018 0.0141 0.110 0.118 2021 3 12 59285 60.542 387.744 -171.0599 0.196 -0.052 0.023 0.018 0.0134 0.110 0.116 2021 3 13 59286 61.723 389.349 -171.2387 0.212 -0.028 0.022 0.018 0.0135 0.111 0.113 2021 3 14 59287 63.046 391.028 -171.5574 0.235 0.000 0.022 0.018 0.0136 0.111 0.109 2021 3 15 59288 64.331 392.504 -171.9515 0.257 0.027 0.022 0.018 0.0135 0.111 0.106 2021 3 16 59289 65.375 394.218 -172.2335 0.280 0.055 0.022 0.018 0.0134 0.111 0.103 2021 3 17 59290 65.657 395.943 -172.4026 0.270 0.057 0.021 0.017 0.0131 0.112 0.100 2021 3 18 59291 65.853 397.460 -172.4204 0.251 0.053 0.021 0.017 0.0125 0.112 0.097 2021 3 19 59292 66.235 398.938 -172.2871 0.232 0.048 0.021 0.017 0.0120 0.112 0.094 2021 3 20 59293 66.580 400.421 -172.0284 0.225 0.054 0.021 0.017 0.0118 0.112 0.091 2021 3 21 59294 67.507 401.767 -171.6900 0.222 0.064 0.021 0.017 0.0151 0.112 0.088 2021 3 22 59295 68.766 403.525 -171.3132 0.220 0.074 0.021 0.017 0.0161 0.113 0.085 2021 3 23 59296 70.017 405.095 -170.9575 0.217 0.084 0.021 0.016 0.0159 0.113 0.083 2021 3 24 59297 71.509 406.504 -170.6787 0.214 0.094 0.022 0.016 0.0155 0.113 0.081 2021 3 25 59298 72.812 407.873 -170.5313 0.224 0.065 0.022 0.016 0.0153 0.113 0.079 2021 3 26 59299 73.728 409.056 -170.5938 0.236 0.026 0.022 0.016 0.0138 0.114 0.078 2021 3 27 59300 74.948 409.668 -170.9185 0.252 0.016 0.023 0.016 0.0139 0.115 0.080 2021 3 28 59301 76.573 409.823 -171.4942 0.270 0.018 0.023 0.016 0.0142 0.116 0.082 2021 3 29 59302 78.236 410.129 -172.2454 0.287 0.019 0.024 0.016 0.0144 0.117 0.085 2021 3 30 59303 79.581 410.456 -173.0409 0.305 0.020 0.024 0.016 0.0145 0.119 0.088 2021 3 31 59304 80.692 411.065 -173.7315 0.344 -0.007 0.024 0.016 0.0145 0.120 0.090 2021 4 1 59305 81.597 411.745 -174.2201 0.389 -0.041 0.024 0.016 0.0147 0.121 0.091 Preliminary extension 2021 4 2 59306 82.266 412.527 -174.4884 0.370 -0.023 0.024 0.016 0.0147 0.122 0.092 2021 4 3 59307 82.863 413.394 -174.5594 0.328 0.012 0.025 0.017 0.0149 0.123 0.093 2021 4 4 59308 83.693 413.955 -174.4710 0.286 0.048 0.025 0.017 0.0131 0.124 0.093 2021 4 5 59309 84.864 414.476 -174.4009 0.245 0.083 0.025 0.017 0.0131 0.125 0.094 2021 4 6 59310 85.864 415.606 -174.4327 0.203 0.118 0.025 0.017 0.0130 0.127 0.095 2021 4 7 59311 86.634 416.842 -174.5973 0.161 0.154 0.026 0.017 0.0130 0.128 0.096 2021 4 8 59312 87.374 417.756 -174.8867 0.186 0.097 0.026 0.017 0.0130 0.129 0.097 2021 4 9 59313 87.622 418.798 -175.2881 0.228 0.015 0.026 0.017 0.0131 0.130 0.097 2021 4 10 59314 87.511 419.912 -175.7735 0.256 0.001 0.026 0.017 0.0132 0.132 0.099 2021 4 11 59315 87.081 420.782 -176.2940 0.278 0.013 0.027 0.017 0.0134 0.133 0.101 2021 4 12 59316 86.768 421.362 -176.7980 0.301 0.026 0.027 0.017 0.0135 0.135 0.103 2021 4 13 59317 86.839 421.893 -177.2453 0.323 0.038 0.028 0.018 0.0136 0.137 0.105 2021 4 14 59318 87.690 422.399 -177.6058 0.306 0.021 0.028 0.018 0.0137 0.138 0.106 2021 4 15 59319 88.770 423.273 -177.8577 0.279 -0.004 0.029 0.018 0.0137 0.140 0.107 2021 4 16 59320 89.996 423.840 -177.9972 0.252 -0.029 0.029 0.018 0.0137 0.141 0.107 2021 4 17 59321 92.160 424.291 -178.0335 0.246 -0.039 0.029 0.018 0.0140 0.500 0.500 2021 4 18 59322 94.242 425.250 -177.9742 0.252 -0.036 0.030 0.019 0.0144 0.500 0.500 2021 4 19 59323 95.950 426.188 -177.8945 0.267 -0.025 0.030 0.019 0.0148 0.500 0.500 2021 4 20 59324 97.259 427.586 -177.8517 0.279 -0.014 0.031 0.019 0.0152 0.500 0.500 2021 4 21 59325 98.252 428.915 -177.9320 0.281 -0.009 0.032 0.019 0.0157 0.500 0.500 2021 4 22 59326 98.978 430.132 -178.1282 0.271 -0.011 0.032 0.020 0.0160 0.500 0.500 2021 4 23 59327 99.627 431.146 -178.5249 0.255 -0.018 0.033 0.020 0.0164 0.500 0.500 2021 4 24 59328 99.860 432.057 -179.1522 0.239 -0.023 0.034 0.020 0.0168 0.500 0.500 2021 4 25 59329 100.015 432.743 -179.9483 0.231 -0.025 0.034 0.021 0.0171 0.500 0.500 2021 4 26 59330 100.368 433.385 -180.9085 0.231 -0.026 0.035 0.021 0.0175 0.500 0.500 2021 4 27 59331 101.311 433.849 -181.8965 0.235 -0.027 0.036 0.021 0.0179 0.500 0.500 2021 4 28 59332 102.662 434.421 -182.7329 0.241 -0.029 0.037 0.022 0.0185 0.500 0.500 2021 4 29 59333 103.993 434.860 -183.2514 0.246 -0.031 0.038 0.022 0.0189 0.500 0.500 2021 4 30 59334 105.409 435.230 -183.3353 0.252 -0.029 0.040 0.022 0.0194 0.500 0.500 2021 5 1 59335 106.816 435.778 -182.9742 0.259 -0.021 0.041 0.023 0.0199 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 3 2 59275 -107.298 -7.344 0.264 0.129 2021 3 3 59276 -107.867 -7.504 0.266 0.129 2021 3 4 59277 -108.333 -7.617 0.266 0.130 2021 3 5 59278 -108.535 -7.596 0.269 0.130 2021 3 6 59279 -108.484 -7.535 0.269 0.129 2021 3 7 59280 -108.315 -7.503 0.271 0.127 2021 3 8 59281 -108.062 -7.541 0.271 0.125 2021 3 9 59282 -107.722 -7.670 0.274 0.123 2021 3 10 59283 -107.388 -7.839 0.274 0.121 2021 3 11 59284 -107.198 -8.012 0.277 0.118 2021 3 12 59285 -107.204 -8.099 0.277 0.116 2021 3 13 59286 -107.275 -8.029 0.279 0.113 2021 3 14 59287 -107.295 -7.866 0.279 0.109 2021 3 15 59288 -107.259 -7.749 0.279 0.106 2021 3 16 59289 -107.205 -7.755 0.279 0.103 2021 3 17 59290 -107.211 -7.870 0.282 0.100 2021 3 18 59291 -107.178 -7.981 0.282 0.097 2021 3 19 59292 -107.117 -8.061 0.282 0.094 2021 3 20 59293 -107.085 -8.161 0.282 0.091 2021 3 21 59294 -107.075 -8.325 0.282 0.088 2021 3 22 59295 -106.939 -8.503 0.284 0.085 2021 3 23 59296 -106.635 -8.632 0.284 0.083 2021 3 24 59297 -106.371 -8.750 0.284 0.081 2021 3 25 59298 -106.284 -8.978 0.284 0.079 2021 3 26 59299 -106.226 -9.237 0.287 0.078 2021 3 27 59300 -105.910 -9.285 0.289 0.080 2021 3 28 59301 -105.462 -9.044 0.292 0.082 2021 3 29 59302 -105.357 -8.732 0.294 0.085 2021 3 30 59303 -105.788 -8.649 0.299 0.088 2021 3 31 59304 -106.343 -8.857 0.302 0.090 2021 4 1 59305 -106.573 -9.100 0.304 0.091 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 3 2 59275 0.6476 0.0072 15.04106706593 0.00000000125 2021 3 3 59276 0.6133 0.0072 15.04106707190 0.00000000125 2021 3 4 59277 0.4339 0.0072 15.04106710313 0.00000000125 2021 3 5 59278 0.1699 0.0072 15.04106714909 0.00000000125 2021 3 6 59279 -0.0526 0.0072 15.04106718783 0.00000000125 2021 3 7 59280 -0.1992 0.0072 15.04106721335 0.00000000125 2021 3 8 59281 -0.2890 0.0072 15.04106722898 0.00000000125 2021 3 9 59282 -0.2599 0.0072 15.04106722392 0.00000000125 2021 3 10 59283 -0.1499 0.0070 15.04106720477 0.00000000122 2021 3 11 59284 -0.0302 0.0070 15.04106718393 0.00000000122 2021 3 12 59285 0.1393 0.0070 15.04106715442 0.00000000122 2021 3 13 59286 0.2694 0.0070 15.04106713177 0.00000000122 2021 3 14 59287 0.3398 0.0069 15.04106711952 0.00000000120 2021 3 15 59288 0.3290 0.0069 15.04106712140 0.00000000120 2021 3 16 59289 0.2248 0.0069 15.04106713954 0.00000000120 2021 3 17 59290 0.0715 0.0068 15.04106716622 0.00000000118 2021 3 18 59291 -0.0538 0.0068 15.04106718804 0.00000000118 2021 3 19 59292 -0.1722 0.0067 15.04106720865 0.00000000117 2021 3 20 59293 -0.3318 0.0067 15.04106723643 0.00000000117 2021 3 21 59294 -0.3582 0.0067 15.04106724103 0.00000000117 2021 3 22 59295 -0.3644 0.0067 15.04106724211 0.00000000117 2021 3 23 59296 -0.3337 0.0067 15.04106723676 0.00000000117 2021 3 24 59297 -0.2430 0.0067 15.04106722097 0.00000000117 2021 3 25 59298 -0.0510 0.0067 15.04106718755 0.00000000117 2021 3 26 59299 0.2010 0.0067 15.04106714368 0.00000000117 2021 3 27 59300 0.4661 0.0067 15.04106709753 0.00000000117 2021 3 28 59301 0.6701 0.0067 15.04106706202 0.00000000117 2021 3 29 59302 0.7908 0.0067 15.04106704100 0.00000000117 2021 3 30 59303 0.7669 0.0067 15.04106704516 0.00000000117 2021 3 31 59304 0.5975 0.0068 15.04106707465 0.00000000118 2021 4 1 59305 0.3752 0.0067 15.04106711335 0.00000000117 4 - INFORMATION ON TIME SCALES TAI - UTC = 37 s. during period [59275-59305] No leap second introduced during period [59275-59305] 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 97 111 15 - 0 0 9 59275.24 to 59303.22 235 232 17 - 172 647 BKG bkg00020a.eops 70 81 4 - 16 41 10 59275.21 to 59303.21 108 83 20 - 68 37 GSFC gsf2020a.eoxy 51 46 3 9 15 38 9 59275.21 to 59303.21 60 77 17 17 47 56 IAA iaa2021a.eops 54 58 4 - 14 37 10 59275.21 to 59303.21 216 241 23 - 81 63 USNO usn2020d.eoxy 43 42 3 - 17 41 9 59275.21 to 59303.21 50 94 19 - 32 44 IVS * ivs20r1X.eops 30 32 2 - 11 27 9 59275.22 to 59303.21 69 98 16 - 3 7 VLBI Intensive GSI * gsiint2c.eopi - - 13 - - - 8 59279.33 to 59301.33 - - 12 - - - BKG * bkg2020.eopi - - 16 - - - 33 59275.79 to 59304.79 - - 34 - - - GSFC * gsf2020a.eopi - - 15 - - - 33 59275.79 to 59304.79 - - 32 - - - IAA * iaa2021a.eopi - - 14 - - - 41 59275.79 to 59304.79 - - 35 - - - PUL pul2010a.eopi - - NaN - - - 0 00000.00 to 00000.00 - - 0 - - - USNO * usn2020d.eopi - - 14 - - - 60 59275.79 to 59304.79 - - 29 - - - GPS CODE COD*ERP_R 5 5 - 1 - - 29 59275.50 to 59304.50 24 19 - 12 - - JPL jpl*.erp 11 12 - 8 - - 30 59275.50 to 59304.50 27 22 - 16 - - GFZ gfz*.erp 6 7 - 1 - - 30 59275.50 to 59304.50 31 30 - 12 - - ESOC esa*.erp 8 9 - 4 - - 30 59275.50 to 59304.50 24 22 - 13 - - SIO sio*.erp siu*.erp 39 39 - 6 - - 15 59275.50 to 59293.50 53 33 - 20 - - EMR emr*.erp 4 3 - 1 - - 30 59275.50 to 59304.50 41 48 - 13 - - IAA gnss.res 0 0 - 0 - - 30 59275.50 to 59304.50 54 103 - 34 - - GRGS grg*.erp 226 226 - 0 - - 30 59275.50 to 59304.50 23 23 - 10 - - ASI asi*.erp 8 8 - 0 - - 26 59275.50 to 59300.50 37 31 - 34 - - MIT mit*.erp 13 12 - 1 - - 30 59275.50 to 59304.50 29 24 - 17 - - IGR * igs96p02.erp 9 9 - 2 - - 30 59275.50 to 59304.50 22 18 - 12 - - IGS * igs00p03.erp 3 3 - 0 - - 30 59275.50 to 59304.50 23 22 - 16 - - SLR MCC tg*.02 169 183 - 24 - - 31 59275.00 to 59305.00 90 145 - 134 - - IAA slr_v.dat 52 57 - 3 - - 31 59275.00 to 59305.00 164 109 - 18 - - ASI slr_oca*.eop 64 68 - 13 - - 30 59275.50 to 59304.50 214 190 - 60 - - ILRS * ilrsa.eop 38 39 - 6 - - 30 59275.50 to 59304.50 94 129 - 20 - - BULLETIN A NEOS mark3.out 17 15 5 - - - 31 59275.00 to 59305.00 44 28 18 - - - To unsubscribe : http://hpiers.obspm.fr/eop-pc/products/bulletins/bulletin_registration.html