********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 24 September 2020 Vol. XXXIII No. 039 ______________________________________________________________________ GENERAL INFORMATION: To receive this information electronically, contact: ser7@maia.usno.navy.mil or use MJD = Julian Date - 2 400 000.5 days UT2-UT1 = 0.022 sin(2*pi*T) - 0.012 cos(2*pi*T) - 0.006 sin(4*pi*T) + 0.007 cos(4*pi*T) where pi = 3.14159265... and T is the date in Besselian years. TT = TAI + 32.184 seconds DUT1= (UT1-UTC) transmitted with time signals = -0.2 seconds beginning 02 May 2019 at 0000 UTC Beginning 1 January 2017: TAI-UTC = 37.000 000 seconds *********************************************************************** * * * There will NOT be a leap second introduced * * in UTC on 31 December 2020 * * * * Notice of Publication Web and FTP Shutdown: * * The US Naval Observatory's Rapid Service/Prediction Center web and * * FTP sites (at maia.usno.navy.mil and toshi.nofs.navy.mil) must * * undergo modernization and have been offline since 24 October 2019. * * The expected completion of work and return of service is no earlier * * than Autumn of 2020 . Please visit https://www.usno.navy.mil and * * submit a Requirements Form to the USNO Public Affairs Official * * (PAO) if the information you are seeking is not accessible via * * another means. If the Requirements Form is not available, please * * contact the USNO PAO Geoff Chester at email address directly * * geoff.chester@navy.mil or phone number 202 762 1438. * * * * Although the Bulletin A makes several references to maia, one * * should note that the paragraph above supercedes any information * * that is contained in the Bulletin A text. Because some users mis- * * takenly use Bulletin A (ser7.dat) instead of other formats (such as * * finals2000A.daily) for operational, machine-to-machine uses, we * * do not wish to change the spacing or text of the files. In the * * past, when spacings had changed, users had stated that any change * * to the Bulletin format outside of this remarks area had broken * * their operations. Therefore, we have not removed the old references * * to maia within the text of the Bulletin A (ser7.dat file). * * * * This shutdown has lead to the indefinite cessation of IERS * * Bulletin A distribution emails. If this occurs, current * * subscribers to the Bulletin A email distribution list may receive * * future mailings from a different address (if this service is * * restored). In the meantime, we will be unable to process email * * subscription/unsubscription requests. * * * * Until 31 Oct 2020, updated EOPs may be available at NASA's Archive * * of Space Geodesy Data anonymous FTP server at: * * ftp://cddis.gsfc.nasa.gov/pub/products/iers * * Daily EOP data may be uploaded here by 18:00 UTC, and * * Bulletin A EOP data may be available by 20:00 UTC. * * Users should please verify results obtained from this site; * * we cannot guarantee the integrity or timeliness of files provided * * at this mirror site. * * * * Please note that CDDIS is reporting that as of 31 Oct 2020, all * * unencrypted ftp service will be permanently discontinued at CDDIS. * * * * For other download options from CDDIS, such as HTTPS, please refer * * to the https://cddis.nasa.gov/About/CDDIS_File_Download_FAQ.html * * * * In addition, updated EOPs may be available at IERS: * * https://datacenter.iers.org/eop.php * * EOP data files are uploaded directly from USNO to this site each * * day. For further information, contact the IERS directly. * * * * Questions and enquiries about EOPs can be emailed to the * * following address: * * usn.ncr.navobsydc.mbx.eopcp@mail.mil * * * * Distribution statement A. * * Approved for public release: distribution unlimited. * * * *********************************************************************** ________________________________________________________________________ The contributed observations used in the preparation of this Bulletin are available at . The contributed analysis results are based on data from Very Long Baseline Interferometry (VLBI), Satellite Laser Ranging (SLR), the Global Positioning System (GPS) satellites, Lunar Laser Ranging (LLR), and meteorological predictions of variations in Atmospheric Angular Momentum (AAM). ________________________________________________________________________ COMBINED EARTH ORIENTATION PARAMETERS: IERS Rapid Service MJD x error y error UT1-UTC error " " " " s s 20 9 18 59110 0.20742 .00009 0.34007 .00009 -0.175992 0.000009 20 9 19 59111 0.20670 .00009 0.33864 .00009 -0.176406 0.000012 20 9 20 59112 0.20572 .00009 0.33726 .00009 -0.176790 0.000011 20 9 21 59113 0.20459 .00009 0.33603 .00009 -0.177014 0.000012 20 9 22 59114 0.20342 .00009 0.33500 .00009 -0.177010 0.000012 20 9 23 59115 0.20234 .00009 0.33400 .00009 -0.176812 0.000013 20 9 24 59116 0.20132 .00009 0.33303 .00009 -0.176467 0.000012 _______________________________________________________________________ PREDICTIONS: The following formulas will not reproduce the predictions given below, but may be used to extend the predictions beyond the end of this table. x = 0.1173 + 0.0741 cos A - 0.0325 sin A + 0.0104 cos C + 0.0016 sin C y = 0.3609 - 0.0315 cos A - 0.0693 sin A + 0.0016 cos C - 0.0104 sin C UT1-UTC = -0.1882 - 0.00006 (MJD - 59124) - (UT2-UT1) where A = 2*pi*(MJD-59116)/365.25 and C = 2*pi*(MJD-59116)/435. TAI-UTC(MJD 59117) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59116)**0.80 S t = 0.00025 (MJD-59116)**0.75 Estimated accuracies are: Predictions 10 d 20 d 30 d 40 d Polar coord's 0.004 0.007 0.010 0.013 UT1-UTC 0.0014 0.0024 0.0032 0.0040 MJD x(arcsec) y(arcsec) UT1-UTC(sec) 2020 9 25 59117 0.2004 0.3319 -0.17605 2020 9 26 59118 0.1995 0.3308 -0.17561 2020 9 27 59119 0.1986 0.3296 -0.17515 2020 9 28 59120 0.1978 0.3284 -0.17475 2020 9 29 59121 0.1970 0.3273 -0.17443 2020 9 30 59122 0.1962 0.3261 -0.17420 2020 10 1 59123 0.1954 0.3250 -0.17407 2020 10 2 59124 0.1947 0.3239 -0.17398 2020 10 3 59125 0.1939 0.3228 -0.17392 2020 10 4 59126 0.1931 0.3217 -0.17384 2020 10 5 59127 0.1922 0.3206 -0.17374 2020 10 6 59128 0.1914 0.3195 -0.17360 2020 10 7 59129 0.1906 0.3184 -0.17338 2020 10 8 59130 0.1897 0.3173 -0.17305 2020 10 9 59131 0.1888 0.3162 -0.17264 2020 10 10 59132 0.1880 0.3151 -0.17221 2020 10 11 59133 0.1871 0.3141 -0.17186 2020 10 12 59134 0.1861 0.3131 -0.17166 2020 10 13 59135 0.1852 0.3121 -0.17169 2020 10 14 59136 0.1842 0.3111 -0.17200 2020 10 15 59137 0.1833 0.3101 -0.17256 2020 10 16 59138 0.1823 0.3091 -0.17329 2020 10 17 59139 0.1813 0.3082 -0.17405 2020 10 18 59140 0.1802 0.3072 -0.17467 2020 10 19 59141 0.1792 0.3063 -0.17504 2020 10 20 59142 0.1781 0.3054 -0.17512 2020 10 21 59143 0.1770 0.3046 -0.17496 2020 10 22 59144 0.1759 0.3037 -0.17466 2020 10 23 59145 0.1748 0.3029 -0.17431 2020 10 24 59146 0.1737 0.3020 -0.17401 2020 10 25 59147 0.1725 0.3012 -0.17380 2020 10 26 59148 0.1713 0.3004 -0.17373 2020 10 27 59149 0.1701 0.2997 -0.17380 2020 10 28 59150 0.1689 0.2989 -0.17399 2020 10 29 59151 0.1677 0.2982 -0.17427 2020 10 30 59152 0.1665 0.2975 -0.17460 2020 10 31 59153 0.1652 0.2968 -0.17493 2020 11 1 59154 0.1639 0.2961 -0.17519 2020 11 2 59155 0.1627 0.2955 -0.17535 2020 11 3 59156 0.1614 0.2948 -0.17539 2020 11 4 59157 0.1600 0.2942 -0.17530 2020 11 5 59158 0.1587 0.2937 -0.17510 2020 11 6 59159 0.1574 0.2931 -0.17486 2020 11 7 59160 0.1560 0.2925 -0.17463 2020 11 8 59161 0.1547 0.2920 -0.17450 2020 11 9 59162 0.1533 0.2915 -0.17455 2020 11 10 59163 0.1519 0.2910 -0.17483 2020 11 11 59164 0.1505 0.2906 -0.17538 2020 11 12 59165 0.1491 0.2902 -0.17614 2020 11 13 59166 0.1477 0.2897 -0.17701 2020 11 14 59167 0.1462 0.2894 -0.17784 2020 11 15 59168 0.1448 0.2890 -0.17851 2020 11 16 59169 0.1433 0.2886 -0.17891 2020 11 17 59170 0.1419 0.2883 -0.17904 2020 11 18 59171 0.1404 0.2880 -0.17895 2020 11 19 59172 0.1389 0.2878 -0.17876 2020 11 20 59173 0.1375 0.2875 -0.17856 2020 11 21 59174 0.1360 0.2873 -0.17843 2020 11 22 59175 0.1345 0.2871 -0.17841 2020 11 23 59176 0.1330 0.2869 -0.17850 2020 11 24 59177 0.1315 0.2868 -0.17869 2020 11 25 59178 0.1300 0.2866 -0.17894 2020 11 26 59179 0.1284 0.2865 -0.17922 2020 11 27 59180 0.1269 0.2864 -0.17946 2020 11 28 59181 0.1254 0.2864 -0.17963 2020 11 29 59182 0.1239 0.2864 -0.17969 2020 11 30 59183 0.1224 0.2864 -0.17962 2020 12 1 59184 0.1208 0.2864 -0.17943 2020 12 2 59185 0.1193 0.2864 -0.17912 2020 12 3 59186 0.1178 0.2865 -0.17875 2020 12 4 59187 0.1163 0.2866 -0.17839 2020 12 5 59188 0.1147 0.2867 -0.17811 2020 12 6 59189 0.1132 0.2868 -0.17799 2020 12 7 59190 0.1117 0.2870 -0.17808 2020 12 8 59191 0.1102 0.2872 -0.17842 2020 12 9 59192 0.1087 0.2874 -0.17898 2020 12 10 59193 0.1071 0.2876 -0.17971 2020 12 11 59194 0.1056 0.2879 -0.18047 2020 12 12 59195 0.1041 0.2882 -0.18114 2020 12 13 59196 0.1026 0.2885 -0.18161 2020 12 14 59197 0.1011 0.2888 -0.18184 2020 12 15 59198 0.0996 0.2892 -0.18184 2020 12 16 59199 0.0981 0.2896 -0.18169 2020 12 17 59200 0.0966 0.2900 -0.18151 2020 12 18 59201 0.0952 0.2904 -0.18138 2020 12 19 59202 0.0937 0.2909 -0.18136 2020 12 20 59203 0.0922 0.2914 -0.18145 2020 12 21 59204 0.0908 0.2919 -0.18165 2020 12 22 59205 0.0894 0.2924 -0.18192 2020 12 23 59206 0.0879 0.2929 -0.18221 2020 12 24 59207 0.0865 0.2935 -0.18248 2020 12 25 59208 0.0851 0.2941 -0.18268 2020 12 26 59209 0.0837 0.2947 -0.18277 2020 12 27 59210 0.0823 0.2954 -0.18274 2020 12 28 59211 0.0809 0.2960 -0.18257 2020 12 29 59212 0.0795 0.2967 -0.18228 2020 12 30 59213 0.0782 0.2974 -0.18192 2020 12 31 59214 0.0768 0.2982 -0.18154 2021 1 1 59215 0.0755 0.2989 -0.18122 2021 1 2 59216 0.0742 0.2997 -0.18104 2021 1 3 59217 0.0729 0.3005 -0.18105 2021 1 4 59218 0.0716 0.3013 -0.18129 2021 1 5 59219 0.0704 0.3022 -0.18172 2021 1 6 59220 0.0691 0.3030 -0.18230 2021 1 7 59221 0.0679 0.3039 -0.18292 2021 1 8 59222 0.0666 0.3048 -0.18347 2021 1 9 59223 0.0654 0.3057 -0.18387 2021 1 10 59224 0.0643 0.3067 -0.18405 2021 1 11 59225 0.0631 0.3076 -0.18392 2021 1 12 59226 0.0619 0.3086 -0.18364 2021 1 13 59227 0.0608 0.3096 -0.18330 2021 1 14 59228 0.0597 0.3106 -0.18300 2021 1 15 59229 0.0586 0.3117 -0.18281 2021 1 16 59230 0.0575 0.3127 -0.18276 2021 1 17 59231 0.0565 0.3138 -0.18285 2021 1 18 59232 0.0554 0.3149 -0.18303 2021 1 19 59233 0.0544 0.3160 -0.18327 2021 1 20 59234 0.0534 0.3171 -0.18351 2021 1 21 59235 0.0525 0.3183 -0.18370 2021 1 22 59236 0.0515 0.3194 -0.18380 2021 1 23 59237 0.0506 0.3206 -0.18378 2021 1 24 59238 0.0497 0.3218 -0.18363 2021 1 25 59239 0.0488 0.3230 -0.18337 2021 1 26 59240 0.0479 0.3242 -0.18303 2021 1 27 59241 0.0471 0.3254 -0.18265 2021 1 28 59242 0.0463 0.3267 -0.18233 2021 1 29 59243 0.0455 0.3279 -0.18215 2021 1 30 59244 0.0447 0.3292 -0.18217 2021 1 31 59245 0.0440 0.3305 -0.18244 2021 2 1 59246 0.0433 0.3318 -0.18294 2021 2 2 59247 0.0426 0.3331 -0.18360 2021 2 3 59248 0.0420 0.3344 -0.18433 2021 2 4 59249 0.0413 0.3358 -0.18501 2021 2 5 59250 0.0407 0.3371 -0.18554 2021 2 6 59251 0.0401 0.3385 -0.18587 2021 2 7 59252 0.0396 0.3399 -0.18598 2021 2 8 59253 0.0390 0.3412 -0.18594 2021 2 9 59254 0.0385 0.3426 -0.18581 2021 2 10 59255 0.0380 0.3440 -0.18571 2021 2 11 59256 0.0376 0.3454 -0.18571 2021 2 12 59257 0.0372 0.3469 -0.18586 2021 2 13 59258 0.0368 0.3483 -0.18617 2021 2 14 59259 0.0364 0.3497 -0.18661 2021 2 15 59260 0.0361 0.3511 -0.18714 2021 2 16 59261 0.0358 0.3526 -0.18768 2021 2 17 59262 0.0355 0.3540 -0.18820 2021 2 18 59263 0.0352 0.3555 -0.18864 2021 2 19 59264 0.0350 0.3570 -0.18896 2021 2 20 59265 0.0348 0.3584 -0.18915 2021 2 21 59266 0.0346 0.3599 -0.18923 2021 2 22 59267 0.0345 0.3614 -0.18921 2021 2 23 59268 0.0344 0.3628 -0.18915 2021 2 24 59269 0.0343 0.3643 -0.18911 2021 2 25 59270 0.0342 0.3658 -0.18919 2021 2 26 59271 0.0342 0.3673 -0.18947 2021 2 27 59272 0.0342 0.3688 -0.19001 2021 2 28 59273 0.0343 0.3703 -0.19083 2021 3 1 59274 0.0343 0.3718 -0.19186 2021 3 2 59275 0.0344 0.3732 -0.19301 2021 3 3 59276 0.0345 0.3747 -0.19412 2021 3 4 59277 0.0347 0.3762 -0.19508 2021 3 5 59278 0.0349 0.3777 -0.19582 2021 3 6 59279 0.0351 0.3792 -0.19632 2021 3 7 59280 0.0353 0.3807 -0.19663 2021 3 8 59281 0.0356 0.3822 -0.19683 2021 3 9 59282 0.0359 0.3836 -0.19703 2021 3 10 59283 0.0362 0.3851 -0.19730 2021 3 11 59284 0.0366 0.3866 -0.19771 2021 3 12 59285 0.0369 0.3881 -0.19827 2021 3 13 59286 0.0374 0.3895 -0.19897 2021 3 14 59287 0.0378 0.3910 -0.19978 2021 3 15 59288 0.0383 0.3924 -0.20062 2021 3 16 59289 0.0388 0.3939 -0.20144 2021 3 17 59290 0.0393 0.3953 -0.20219 2021 3 18 59291 0.0398 0.3967 -0.20282 2021 3 19 59292 0.0404 0.3982 -0.20331 2021 3 20 59293 0.0410 0.3996 -0.20366 2021 3 21 59294 0.0417 0.4010 -0.20389 2021 3 22 59295 0.0424 0.4024 -0.20404 2021 3 23 59296 0.0431 0.4038 -0.20418 2021 3 24 59297 0.0438 0.4052 -0.20438 2021 3 25 59298 0.0445 0.4065 -0.20473 2021 3 26 59299 0.0453 0.4079 -0.20532 2021 3 27 59300 0.0461 0.4092 -0.20618 2021 3 28 59301 0.0470 0.4106 -0.20730 2021 3 29 59302 0.0478 0.4119 -0.20859 2021 3 30 59303 0.0487 0.4132 -0.20992 2021 3 31 59304 0.0496 0.4145 -0.21112 2021 4 1 59305 0.0506 0.4158 -0.21209 2021 4 2 59306 0.0515 0.4171 -0.21279 2021 4 3 59307 0.0525 0.4184 -0.21326 2021 4 4 59308 0.0535 0.4196 -0.21356 2021 4 5 59309 0.0546 0.4208 -0.21381 2021 4 6 59310 0.0556 0.4221 -0.21409 2021 4 7 59311 0.0567 0.4233 -0.21446 2021 4 8 59312 0.0578 0.4244 -0.21495 2021 4 9 59313 0.0590 0.4256 -0.21556 2021 4 10 59314 0.0601 0.4268 -0.21627 2021 4 11 59315 0.0613 0.4279 -0.21703 2021 4 12 59316 0.0625 0.4290 -0.21778 2021 4 13 59317 0.0638 0.4301 -0.21845 2021 4 14 59318 0.0650 0.4312 -0.21898 2021 4 15 59319 0.0663 0.4323 -0.21935 2021 4 16 59320 0.0676 0.4333 -0.21954 2021 4 17 59321 0.0689 0.4343 -0.21959 2021 4 18 59322 0.0702 0.4354 -0.21955 2021 4 19 59323 0.0716 0.4363 -0.21951 2021 4 20 59324 0.0730 0.4373 -0.21954 2021 4 21 59325 0.0744 0.4383 -0.21973 2021 4 22 59326 0.0758 0.4392 -0.22014 2021 4 23 59327 0.0772 0.4401 -0.22085 2021 4 24 59328 0.0787 0.4410 -0.22186 2021 4 25 59329 0.0802 0.4418 -0.22311 2021 4 26 59330 0.0817 0.4427 -0.22450 2021 4 27 59331 0.0832 0.4435 -0.22585 2021 4 28 59332 0.0847 0.4443 -0.22703 2021 4 29 59333 0.0862 0.4451 -0.22794 2021 4 30 59334 0.0878 0.4458 -0.22858 2021 5 1 59335 0.0894 0.4465 -0.22901 2021 5 2 59336 0.0910 0.4473 -0.22931 2021 5 3 59337 0.0926 0.4479 -0.22959 2021 5 4 59338 0.0942 0.4486 -0.22992 2021 5 5 59339 0.0958 0.4492 -0.23035 2021 5 6 59340 0.0975 0.4498 -0.23089 2021 5 7 59341 0.0991 0.4504 -0.23150 2021 5 8 59342 0.1008 0.4510 -0.23215 2021 5 9 59343 0.1025 0.4515 -0.23278 2021 5 10 59344 0.1042 0.4520 -0.23336 2021 5 11 59345 0.1059 0.4525 -0.23387 2021 5 12 59346 0.1076 0.4529 -0.23427 2021 5 13 59347 0.1093 0.4534 -0.23449 2021 5 14 59348 0.1111 0.4538 -0.23445 2021 5 15 59349 0.1128 0.4542 -0.23417 2021 5 16 59350 0.1146 0.4545 -0.23378 2021 5 17 59351 0.1163 0.4548 -0.23335 2021 5 18 59352 0.1181 0.4551 -0.23294 2021 5 19 59353 0.1199 0.4554 -0.23267 2021 5 20 59354 0.1216 0.4556 -0.23259 2021 5 21 59355 0.1234 0.4559 -0.23271 2021 5 22 59356 0.1252 0.4560 -0.23312 2021 5 23 59357 0.1270 0.4562 -0.23374 2021 5 24 59358 0.1288 0.4563 -0.23445 2021 5 25 59359 0.1306 0.4565 -0.23505 2021 5 26 59360 0.1324 0.4565 -0.23540 2021 5 27 59361 0.1343 0.4566 -0.23542 2021 5 28 59362 0.1361 0.4566 -0.23519 2021 5 29 59363 0.1379 0.4566 -0.23487 2021 5 30 59364 0.1397 0.4566 -0.23453 2021 5 31 59365 0.1415 0.4565 -0.23426 2021 6 1 59366 0.1433 0.4564 -0.23412 2021 6 2 59367 0.1452 0.4563 -0.23416 2021 6 3 59368 0.1470 0.4562 -0.23430 2021 6 4 59369 0.1488 0.4560 -0.23456 2021 6 5 59370 0.1506 0.4558 -0.23487 2021 6 6 59371 0.1524 0.4556 -0.23521 2021 6 7 59372 0.1542 0.4554 -0.23548 2021 6 8 59373 0.1560 0.4551 -0.23562 2021 6 9 59374 0.1578 0.4548 -0.23560 2021 6 10 59375 0.1596 0.4544 -0.23541 2021 6 11 59376 0.1614 0.4541 -0.23506 2021 6 12 59377 0.1632 0.4537 -0.23464 2021 6 13 59378 0.1650 0.4533 -0.23422 2021 6 14 59379 0.1668 0.4528 -0.23389 2021 6 15 59380 0.1685 0.4524 -0.23367 2021 6 16 59381 0.1703 0.4519 -0.23360 2021 6 17 59382 0.1720 0.4513 -0.23367 2021 6 18 59383 0.1738 0.4508 -0.23388 2021 6 19 59384 0.1755 0.4502 -0.23410 2021 6 20 59385 0.1772 0.4496 -0.23432 2021 6 21 59386 0.1789 0.4490 -0.23442 2021 6 22 59387 0.1806 0.4483 -0.23431 2021 6 23 59388 0.1823 0.4476 -0.23392 2021 6 24 59389 0.1840 0.4469 -0.23320 2021 6 25 59390 0.1857 0.4462 -0.23224 2021 6 26 59391 0.1873 0.4454 -0.23119 2021 6 27 59392 0.1889 0.4446 -0.23021 2021 6 28 59393 0.1906 0.4438 -0.22937 2021 6 29 59394 0.1922 0.4430 -0.22872 2021 6 30 59395 0.1938 0.4421 -0.22833 2021 7 1 59396 0.1953 0.4412 -0.22809 2021 7 2 59397 0.1969 0.4403 -0.22784 2021 7 3 59398 0.1984 0.4394 -0.22759 2021 7 4 59399 0.2000 0.4384 -0.22729 2021 7 5 59400 0.2015 0.4374 -0.22686 2021 7 6 59401 0.2030 0.4364 -0.22627 2021 7 7 59402 0.2045 0.4354 -0.22551 2021 7 8 59403 0.2059 0.4344 -0.22460 2021 7 9 59404 0.2074 0.4333 -0.22359 2021 7 10 59405 0.2088 0.4322 -0.22253 2021 7 11 59406 0.2102 0.4311 -0.22148 2021 7 12 59407 0.2115 0.4299 -0.22052 2021 7 13 59408 0.2129 0.4288 -0.21972 2021 7 14 59409 0.2142 0.4276 -0.21907 2021 7 15 59410 0.2156 0.4264 -0.21856 2021 7 16 59411 0.2168 0.4252 -0.21816 2021 7 17 59412 0.2181 0.4239 -0.21783 2021 7 18 59413 0.2194 0.4226 -0.21744 2021 7 19 59414 0.2206 0.4214 -0.21685 2021 7 20 59415 0.2218 0.4201 -0.21607 2021 7 21 59416 0.2230 0.4187 -0.21509 2021 7 22 59417 0.2241 0.4174 -0.21396 2021 7 23 59418 0.2252 0.4160 -0.21273 2021 7 24 59419 0.2263 0.4147 -0.21151 2021 7 25 59420 0.2274 0.4133 -0.21041 2021 7 26 59421 0.2285 0.4119 -0.20947 2021 7 27 59422 0.2295 0.4104 -0.20877 2021 7 28 59423 0.2305 0.4090 -0.20824 2021 7 29 59424 0.2314 0.4075 -0.20777 2021 7 30 59425 0.2324 0.4060 -0.20725 2021 7 31 59426 0.2333 0.4046 -0.20664 2021 8 1 59427 0.2342 0.4031 -0.20593 2021 8 2 59428 0.2351 0.4015 -0.20513 2021 8 3 59429 0.2359 0.4000 -0.20420 2021 8 4 59430 0.2367 0.3985 -0.20314 2021 8 5 59431 0.2375 0.3969 -0.20195 2021 8 6 59432 0.2382 0.3953 -0.20074 2021 8 7 59433 0.2389 0.3937 -0.19954 2021 8 8 59434 0.2396 0.3922 -0.19838 2021 8 9 59435 0.2403 0.3905 -0.19735 2021 8 10 59436 0.2409 0.3889 -0.19658 2021 8 11 59437 0.2415 0.3873 -0.19610 2021 8 12 59438 0.2420 0.3857 -0.19579 2021 8 13 59439 0.2426 0.3840 -0.19559 2021 8 14 59440 0.2431 0.3824 -0.19543 2021 8 15 59441 0.2436 0.3807 -0.19515 2021 8 16 59442 0.2440 0.3790 -0.19463 2021 8 17 59443 0.2444 0.3774 -0.19391 2021 8 18 59444 0.2448 0.3757 -0.19303 2021 8 19 59445 0.2451 0.3740 -0.19213 2021 8 20 59446 0.2454 0.3723 -0.19132 2021 8 21 59447 0.2457 0.3706 -0.19063 2021 8 22 59448 0.2460 0.3689 -0.19010 2021 8 23 59449 0.2462 0.3672 -0.18976 2021 8 24 59450 0.2464 0.3655 -0.18959 2021 8 25 59451 0.2465 0.3637 -0.18954 2021 8 26 59452 0.2467 0.3620 -0.18950 2021 8 27 59453 0.2467 0.3603 -0.18938 2021 8 28 59454 0.2468 0.3586 -0.18910 2021 8 29 59455 0.2468 0.3568 -0.18863 2021 8 30 59456 0.2468 0.3551 -0.18797 2021 8 31 59457 0.2468 0.3534 -0.18718 2021 9 1 59458 0.2467 0.3517 -0.18632 2021 9 2 59459 0.2466 0.3499 -0.18536 2021 9 3 59460 0.2465 0.3482 -0.18439 2021 9 4 59461 0.2463 0.3465 -0.18347 2021 9 5 59462 0.2461 0.3448 -0.18269 2021 9 6 59463 0.2458 0.3430 -0.18216 2021 9 7 59464 0.2456 0.3413 -0.18190 2021 9 8 59465 0.2453 0.3396 -0.18196 2021 9 9 59466 0.2449 0.3379 -0.18220 2021 9 10 59467 0.2446 0.3362 -0.18248 2021 9 11 59468 0.2442 0.3345 -0.18263 2021 9 12 59469 0.2437 0.3328 -0.18260 2021 9 13 59470 0.2433 0.3311 -0.18236 2021 9 14 59471 0.2428 0.3294 -0.18197 2021 9 15 59472 0.2422 0.3277 -0.18149 2021 9 16 59473 0.2417 0.3261 -0.18102 2021 9 17 59474 0.2411 0.3244 -0.18065 2021 9 18 59475 0.2405 0.3228 -0.18042 2021 9 19 59476 0.2398 0.3211 -0.18033 2021 9 20 59477 0.2391 0.3195 -0.18036 2021 9 21 59478 0.2384 0.3178 -0.18044 2021 9 22 59479 0.2377 0.3162 -0.18053 2021 9 23 59480 0.2369 0.3146 -0.18057 2021 9 24 59481 0.2361 0.3130 -0.18052 These predictions are based on all announced leap seconds. CELESTIAL POLE OFFSET SERIES: NEOS Celestial Pole Offset Series MJD dpsi error deps error (msec. of arc) 59094 -117.36 0.48 -10.14 0.08 59095 -117.35 0.48 -9.84 0.08 59096 -117.41 0.48 -9.58 0.08 59097 -117.45 0.67 -9.50 0.14 59098 -117.37 0.67 -9.55 0.14 59099 -117.16 0.56 -9.60 0.11 59100 -117.04 0.45 -9.62 0.06 59101 -117.27 0.45 -9.67 0.06 59102 -117.83 0.45 -9.83 0.06 59103 -118.29 0.45 -10.02 0.06 59104 -118.25 0.45 -10.12 0.06 59105 -117.78 0.36 -10.07 0.01 59106 -117.28 0.36 -9.95 0.01 59107 -116.98 0.36 -9.78 0.01 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 59094 0.191 0.190 -0.041 0.080 59095 0.206 0.190 -0.043 0.080 59096 0.216 0.190 -0.048 0.080 59097 0.221 0.265 -0.052 0.145 59098 0.220 0.265 -0.054 0.145 59099 0.215 0.222 -0.054 0.108 59100 0.207 0.180 -0.053 0.063 59101 0.198 0.180 -0.050 0.063 59102 0.189 0.180 -0.046 0.063 59103 0.180 0.180 -0.039 0.063 59104 0.171 0.180 -0.032 0.063 59105 0.162 0.145 -0.023 0.010 59106 0.154 0.145 -0.014 0.010 59107 0.145 0.145 -0.004 0.010 The recommended software to predict celestial pole offsets can be found at and software for the calculation of the dX and dY components with respect to IAU2000A Nutation/Precession Theory can be found at the web site in Chapter 5 Section 5.5 of the IERS Conventions (2010).