BULLETIN B 400 2 June 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 0.026 0.016 0.0123 0.018 0.039 2021 4 2 59306 82.266 412.527 -174.4884 0.373 -0.016 0.024 0.016 0.0147 0.054 0.062 2021 4 3 59307 82.863 413.394 -174.5594 0.331 0.018 0.025 0.017 0.0149 0.050 0.060 2021 4 4 59308 83.694 413.955 -174.4710 0.288 0.052 0.025 0.017 0.0131 0.050 0.058 2021 4 5 59309 84.866 414.476 -174.4009 0.246 0.086 0.025 0.017 0.0131 0.049 0.056 2021 4 6 59310 85.863 415.604 -174.4328 0.204 0.120 0.026 0.017 0.0138 0.049 0.055 2021 4 7 59311 86.636 416.842 -174.5974 0.162 0.154 0.026 0.017 0.0128 0.048 0.053 2021 4 8 59312 87.374 417.758 -174.8862 0.190 0.100 0.026 0.017 0.0128 0.048 0.051 2021 4 9 59313 87.621 418.801 -175.2874 0.238 0.022 0.026 0.017 0.0120 0.047 0.050 2021 4 10 59314 87.511 419.908 -175.7729 0.264 0.007 0.027 0.017 0.0121 0.047 0.047 2021 4 11 59315 87.081 420.785 -176.2939 0.281 0.015 0.027 0.017 0.0121 0.046 0.045 2021 4 12 59316 86.768 421.358 -176.7986 0.299 0.023 0.027 0.017 0.0119 0.045 0.043 2021 4 13 59317 86.839 421.892 -177.2455 0.316 0.031 0.028 0.017 0.0124 0.045 0.042 2021 4 14 59318 87.692 422.398 -177.6055 0.299 0.020 0.027 0.017 0.0128 0.044 0.039 2021 4 15 59319 88.768 423.267 -177.8557 0.272 0.005 0.027 0.017 0.0127 0.044 0.037 2021 4 16 59320 89.996 423.845 -177.9907 0.246 -0.009 0.027 0.017 0.0125 0.043 0.035 2021 4 17 59321 92.158 424.284 -178.0250 0.213 -0.020 0.027 0.017 0.0125 0.043 0.033 2021 4 18 59322 94.246 425.257 -177.9868 0.179 -0.030 0.027 0.017 0.0123 0.042 0.031 2021 4 19 59323 95.947 426.181 -177.9103 0.144 -0.039 0.027 0.017 0.0123 0.042 0.030 2021 4 20 59324 97.266 427.588 -177.8571 0.110 -0.048 0.027 0.017 0.0117 0.041 0.028 2021 4 21 59325 98.245 428.908 -177.9160 0.136 -0.061 0.027 0.017 0.0116 0.041 0.027 2021 4 22 59326 99.005 430.149 -178.1298 0.179 -0.074 0.027 0.017 0.0110 0.040 0.026 2021 4 23 59327 99.573 431.096 -178.5406 0.222 -0.087 0.026 0.017 0.0110 0.040 0.025 2021 4 24 59328 99.809 432.023 -179.1390 0.229 -0.125 0.026 0.017 0.0112 0.040 0.025 2021 4 25 59329 100.034 432.771 -179.9364 0.223 -0.172 0.026 0.017 0.0113 0.041 0.026 2021 4 26 59330 100.355 433.380 -180.9123 0.217 -0.219 0.026 0.017 0.0114 0.042 0.028 2021 4 27 59331 101.324 433.851 -181.9026 0.210 -0.266 0.026 0.017 0.0117 0.043 0.030 2021 4 28 59332 102.654 434.414 -182.6964 0.247 -0.175 0.026 0.017 0.0117 0.044 0.031 2021 4 29 59333 104.008 434.868 -183.1982 0.294 -0.052 0.026 0.016 0.0117 0.045 0.032 2021 4 30 59334 105.404 435.218 -183.3833 0.340 0.071 0.026 0.016 0.0116 0.045 0.033 2021 5 1 59335 106.820 435.779 -183.3089 0.322 0.083 0.026 0.016 0.0117 0.046 0.035 Preliminary extension 2021 5 2 59336 108.188 436.419 -183.0909 0.281 0.054 0.026 0.017 0.0118 0.047 0.036 2021 5 3 59337 109.767 437.441 -182.7909 0.239 0.025 0.026 0.017 0.0118 0.048 0.037 2021 5 4 59338 111.592 438.462 -182.5243 0.198 -0.004 0.026 0.017 0.0113 0.049 0.038 2021 5 5 59339 113.316 439.368 -182.3978 0.182 -0.033 0.025 0.017 0.0115 0.050 0.040 2021 5 6 59340 115.277 440.307 -182.4200 0.173 -0.063 0.025 0.017 0.0117 0.051 0.043 2021 5 7 59341 117.172 441.482 -182.5670 0.164 -0.092 0.025 0.017 0.0120 0.053 0.045 2021 5 8 59342 118.680 442.648 -182.7887 0.169 -0.100 0.025 0.017 0.0124 0.054 0.047 2021 5 9 59343 120.435 443.435 -183.0318 0.180 -0.100 0.025 0.018 0.0128 0.055 0.050 2021 5 10 59344 122.009 444.252 -183.2391 0.190 -0.099 0.025 0.018 0.0132 0.056 0.053 2021 5 11 59345 123.235 444.954 -183.3685 0.201 -0.099 0.025 0.018 0.0135 0.057 0.056 2021 5 12 59346 124.565 445.117 -183.4024 0.207 -0.099 0.025 0.018 0.0139 0.059 0.058 2021 5 13 59347 126.401 444.902 -183.3183 0.213 -0.099 0.025 0.019 0.0142 0.060 0.061 2021 5 14 59348 128.388 445.001 -183.1203 0.218 -0.099 0.026 0.019 0.0145 0.061 0.063 2021 5 15 59349 130.279 445.426 -182.8246 0.224 -0.100 0.026 0.019 0.0148 0.062 0.066 2021 5 16 59350 132.465 445.766 -182.4804 0.229 -0.100 0.027 0.020 0.0150 0.064 0.069 2021 5 17 59351 134.910 446.346 -182.2600 0.235 -0.100 0.027 0.020 0.0151 0.065 0.071 2021 5 18 59352 137.094 446.654 -182.0751 0.240 -0.100 0.027 0.020 0.0152 0.067 0.074 2021 5 19 59353 139.400 446.486 -181.9874 0.246 -0.100 0.028 0.021 0.0152 0.068 0.076 2021 5 20 59354 142.051 446.213 -182.0972 0.242 -0.105 0.028 0.021 0.0157 0.500 0.500 2021 5 21 59355 144.531 446.086 -182.4879 0.228 -0.116 0.029 0.022 0.0164 0.500 0.500 2021 5 22 59356 146.627 446.108 -183.0445 0.211 -0.130 0.029 0.022 0.0170 0.500 0.500 2021 5 23 59357 148.370 446.287 -183.7323 0.195 -0.143 0.030 0.022 0.0176 0.500 0.500 2021 5 24 59358 150.044 446.034 -184.4526 0.187 -0.149 0.030 0.023 0.0182 0.500 0.500 2021 5 25 59359 151.691 445.520 -185.0688 0.190 -0.142 0.031 0.023 0.0189 0.500 0.500 2021 5 26 59360 153.125 445.186 -185.4604 0.201 -0.123 0.032 0.023 0.0196 0.500 0.500 2021 5 27 59361 154.588 444.758 -185.5674 0.214 -0.097 0.033 0.024 0.0203 0.500 0.500 2021 5 28 59362 156.093 444.098 -185.3941 0.223 -0.072 0.034 0.024 0.0209 0.500 0.500 2021 5 29 59363 157.788 443.319 -185.0576 0.226 -0.056 0.035 0.025 0.0216 0.500 0.500 2021 5 30 59364 159.487 443.178 -184.6208 0.221 -0.052 0.037 0.026 0.0221 0.500 0.500 2021 5 31 59365 160.783 443.069 -184.1987 0.214 -0.060 0.038 0.027 0.0227 0.500 0.500 2021 6 1 59366 162.163 442.510 -183.9549 0.205 -0.072 0.040 0.028 0.0234 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 4 2 59306 -106.526 -9.134 0.136 0.062 2021 4 3 59307 -106.357 -9.054 0.126 0.060 2021 4 4 59308 -106.265 -8.993 0.126 0.058 2021 4 5 59309 -106.290 -8.990 0.123 0.056 2021 4 6 59310 -106.306 -9.021 0.123 0.055 2021 4 7 59311 -106.207 -9.070 0.121 0.053 2021 4 8 59312 -105.886 -9.192 0.121 0.051 2021 4 9 59313 -105.640 -9.234 0.118 0.050 2021 4 10 59314 -105.648 -9.045 0.118 0.047 2021 4 11 59315 -105.773 -8.744 0.116 0.045 2021 4 12 59316 -105.846 -8.552 0.113 0.043 2021 4 13 59317 -105.810 -8.603 0.113 0.042 2021 4 14 59318 -105.761 -8.851 0.111 0.039 2021 4 15 59319 -105.691 -9.111 0.111 0.037 2021 4 16 59320 -105.670 -9.299 0.108 0.035 2021 4 17 59321 -105.805 -9.475 0.108 0.033 2021 4 18 59322 -106.010 -9.693 0.106 0.031 2021 4 19 59323 -106.040 -9.876 0.106 0.030 2021 4 20 59324 -105.762 -9.917 0.103 0.028 2021 4 21 59325 -105.268 -9.880 0.103 0.027 2021 4 22 59326 -105.013 -9.959 0.101 0.026 2021 4 23 59327 -105.001 -10.212 0.101 0.025 2021 4 24 59328 -104.985 -10.413 0.101 0.025 2021 4 25 59329 -104.882 -10.281 0.103 0.026 2021 4 26 59330 -105.064 -9.917 0.106 0.028 2021 4 27 59331 -105.732 -9.702 0.108 0.030 2021 4 28 59332 -106.366 -9.670 0.111 0.031 2021 4 29 59333 -106.503 -9.731 0.113 0.032 2021 4 30 59334 -106.086 -9.707 0.113 0.033 2021 5 1 59335 -105.624 -9.755 0.116 0.035 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 4 2 59306 0.1577 0.0067 15.04106715122 0.00000000117 2021 4 3 59307 -0.0218 0.0067 15.04106718247 0.00000000117 2021 4 4 59308 -0.1093 0.0067 15.04106719770 0.00000000117 2021 4 5 59309 -0.0380 0.0067 15.04106718529 0.00000000117 2021 4 6 59310 0.0917 0.0067 15.04106716271 0.00000000117 2021 4 7 59311 0.2245 0.0067 15.04106713959 0.00000000117 2021 4 8 59312 0.3464 0.0066 15.04106711837 0.00000000115 2021 4 9 59313 0.4559 0.0066 15.04106709930 0.00000000115 2021 4 10 59314 0.5100 0.0066 15.04106708989 0.00000000115 2021 4 11 59315 0.5274 0.0066 15.04106708686 0.00000000115 2021 4 12 59316 0.4752 0.0066 15.04106709594 0.00000000115 2021 4 13 59317 0.4063 0.0067 15.04106710794 0.00000000117 2021 4 14 59318 0.2914 0.0067 15.04106712794 0.00000000117 2021 4 15 59319 0.1882 0.0067 15.04106714591 0.00000000117 2021 4 16 59320 0.0721 0.0067 15.04106716612 0.00000000117 2021 4 17 59321 -0.0067 0.0068 15.04106717984 0.00000000118 2021 4 18 59322 -0.0674 0.0068 15.04106719040 0.00000000118 2021 4 19 59323 -0.0733 0.0068 15.04106719143 0.00000000118 2021 4 20 59324 -0.0075 0.0065 15.04106717998 0.00000000113 2021 4 21 59325 0.1384 0.0067 15.04106715458 0.00000000117 2021 4 22 59326 0.3258 0.0067 15.04106712195 0.00000000117 2021 4 23 59327 0.5455 0.0066 15.04106708371 0.00000000115 2021 4 24 59328 0.7338 0.0067 15.04106705093 0.00000000117 2021 4 25 59329 0.9053 0.0067 15.04106702107 0.00000000117 2021 4 26 59330 0.9884 0.0067 15.04106700660 0.00000000117 2021 4 27 59331 0.8952 0.0067 15.04106702283 0.00000000117 2021 4 28 59332 0.6420 0.0067 15.04106706691 0.00000000117 2021 4 29 59333 0.3262 0.0066 15.04106712188 0.00000000115 2021 4 30 59334 0.0436 0.0066 15.04106717108 0.00000000115 2021 5 1 59335 -0.1567 0.0066 15.04106720595 0.00000000115 4 - INFORMATION ON TIME SCALES TAI - UTC = 37 s. during period [59306-59335] No leap second introduced during period [59306-59335] 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 179 275 33 - 0 0 7 59311.22 to 59331.19 165 580 31 - 75 461 BKG bkg00020a.eops 66 65 3 - 19 46 8 59311.21 to 59334.27 56 66 14 - 43 49 GSFC gsf2020a.eoxy 62 55 3 9 19 44 8 59311.21 to 59334.27 72 96 16 9 45 40 IAA iaa2021a.eops 66 70 4 - 17 43 6 59313.27 to 59331.21 250 136 21 - 35 58 USNO usn2020d.eoxy 55 53 3 - 20 49 8 59311.21 to 59334.27 76 87 14 - 26 42 IVS * ivs20r1X.eops 32 31 1 - 11 27 7 59311.22 to 59331.19 14 24 3 - 6 5 VLBI Intensive GSI * gsiint2c.eopi - - 6 - - - 8 59307.34 to 59329.33 - - 18 - - - BKG * bkg2020.eopi - - 12 - - - 27 59307.33 to 59334.80 - - 19 - - - GSFC * gsf2020a.eopi - - 12 - - - 27 59307.33 to 59334.80 - - 19 - - - IAA * iaa2021a.eopi - - 39 - - - 32 59307.33 to 59334.80 - - 34 - - - USNO * usn2020d.eopi - - 14 - - - 51 59306.79 to 59334.87 - - 114 - - - GPS CODE COD*ERP_R 5 5 - 0 - - 29 59306.50 to 59334.50 26 29 - 12 - - JPL jpl*.erp 12 14 - 6 - - 29 59306.50 to 59334.50 27 26 - 17 - - GFZ gfz*.erp 7 8 - 1 - - 29 59306.50 to 59334.50 34 32 - 14 - - ESOC esa*.erp 7 9 - 3 - - 29 59306.50 to 59334.50 26 28 - 15 - - EMR emr*.erp 3 3 - 0 - - 29 59306.50 to 59334.50 53 36 - 11 - - IAA gnss.res 0 0 - 0 - - 29 59306.50 to 59334.50 49 82 - 28 - - GRGS grg*.erp 227 227 - 0 - - 29 59306.50 to 59334.50 30 21 - 13 - - ASI asi*.erp 8 8 - 0 - - 20 59308.50 to 59334.50 51 34 - 37 - - MIT mit*.erp 12 12 - 1 - - 29 59306.50 to 59334.50 34 31 - 16 - - IGR * igs96p02.erp 11 8 - 2 - - 29 59306.50 to 59334.50 21 21 - 9 - - IGS * igs00p03.erp 3 3 - 0 - - 29 59306.50 to 59334.50 25 28 - 15 - - SLR MCC tg*.02 157 193 - 25 - - 30 59306.00 to 59335.00 70 106 - 163 - - IAA slr_v.dat 56 67 - 4 - - 29 59306.00 to 59335.00 178 158 - 25 - - ASI slr_oca*.eop 66 82 - 15 - - 26 59306.50 to 59331.50 248 298 - 54 - - ILRS * ilrsa.eop 42 50 - 7 - - 29 59306.50 to 59334.50 135 153 - 25 - - BULLETIN A NEOS mark3.out 14 20 5 - - - 30 59306.00 to 59335.00 42 35 21 - - - To unsubscribe : http://hpiers.obspm.fr/eop-pc/products/bulletins/bulletin_registration.html