********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 2 January 2020 Vol. XXXIII No. 001 ______________________________________________________________________ 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 *********************************************************************** * * * 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 estimated * * as 30 April 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 directly * * contact the USNO PAO Geoff Chester at email address * * 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. * * * * Currently, 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. * * * * 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 19 12 27 58844 0.08683 .00009 0.28067 .00009 -0.176206 0.000012 19 12 28 58845 0.08497 .00009 0.28124 .00009 -0.176249 0.000013 19 12 29 58846 0.08279 .00009 0.28159 .00009 -0.176336 0.000010 19 12 30 58847 0.08041 .00009 0.28175 .00009 -0.176518 0.000008 19 12 31 58848 0.07829 .00009 0.28193 .00009 -0.176836 0.000008 20 1 1 58849 0.07650 .00009 0.28229 .00009 -0.177278 0.000065 20 1 2 58850 0.07466 .00009 0.28276 .00009 -0.177771 0.000055 IERS Final Values MJD x y UT1-UTC " " s 19 11 2 58789 0.1653 0.2803 -0.15919 19 11 3 58790 0.1647 0.2794 -0.15918 19 11 4 58791 0.1639 0.2788 -0.15919 19 11 5 58792 0.1631 0.2782 -0.15929 19 11 6 58793 0.1624 0.2780 -0.15945 19 11 7 58794 0.1614 0.2779 -0.15977 19 11 8 58795 0.1605 0.2772 -0.16024 19 11 9 58796 0.1592 0.2766 -0.16086 19 11 10 58797 0.1579 0.2759 -0.16156 19 11 11 58798 0.1567 0.2753 -0.16226 19 11 12 58799 0.1556 0.2750 -0.16291 19 11 13 58800 0.1543 0.2751 -0.16344 19 11 14 58801 0.1531 0.2750 -0.16391 19 11 15 58802 0.1522 0.2750 -0.16418 19 11 16 58803 0.1503 0.2751 -0.16441 19 11 17 58804 0.1476 0.2745 -0.16446 19 11 18 58805 0.1453 0.2737 -0.16452 19 11 19 58806 0.1433 0.2731 -0.16466 19 11 20 58807 0.1416 0.2724 -0.16501 19 11 21 58808 0.1397 0.2718 -0.16558 19 11 22 58809 0.1379 0.2710 -0.16635 19 11 23 58810 0.1359 0.2705 -0.16721 19 11 24 58811 0.1337 0.2701 -0.16809 19 11 25 58812 0.1319 0.2695 -0.16886 19 11 26 58813 0.1301 0.2691 -0.16946 19 11 27 58814 0.1287 0.2691 -0.17010 19 11 28 58815 0.1273 0.2694 -0.17039 19 11 29 58816 0.1260 0.2696 -0.17001 19 11 30 58817 0.1246 0.2699 -0.17002 19 12 1 58818 0.1230 0.2704 -0.17000 _______________________________________________________________________ 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 = 0.1248 - 0.0532 cos A - 0.0911 sin A + 0.0045 cos C + 0.0186 sin C y = 0.3469 - 0.0819 cos A + 0.0510 sin A + 0.0186 cos C - 0.0045 sin C UT1-UTC = -0.1681 - 0.00032 (MJD - 58858) - (UT2-UT1) where A = 2*pi*(MJD-58850)/365.25 and C = 2*pi*(MJD-58850)/435. TAI-UTC(MJD 58851) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58850)**0.80 S t = 0.00025 (MJD-58850)**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 1 3 58851 0.0730 0.2833 -0.17830 2020 1 4 58852 0.0712 0.2839 -0.17881 2020 1 5 58853 0.0696 0.2845 -0.17927 2020 1 6 58854 0.0680 0.2852 -0.17961 2020 1 7 58855 0.0665 0.2859 -0.17979 2020 1 8 58856 0.0650 0.2866 -0.17984 2020 1 9 58857 0.0637 0.2874 -0.17977 2020 1 10 58858 0.0623 0.2884 -0.17963 2020 1 11 58859 0.0609 0.2893 -0.17949 2020 1 12 58860 0.0595 0.2903 -0.17946 2020 1 13 58861 0.0583 0.2913 -0.17965 2020 1 14 58862 0.0570 0.2923 -0.18012 2020 1 15 58863 0.0558 0.2934 -0.18085 2020 1 16 58864 0.0546 0.2945 -0.18174 2020 1 17 58865 0.0535 0.2957 -0.18268 2020 1 18 58866 0.0524 0.2969 -0.18356 2020 1 19 58867 0.0514 0.2981 -0.18427 2020 1 20 58868 0.0503 0.2993 -0.18477 2020 1 21 58869 0.0493 0.3006 -0.18503 2020 1 22 58870 0.0484 0.3019 -0.18508 2020 1 23 58871 0.0474 0.3032 -0.18499 2020 1 24 58872 0.0464 0.3045 -0.18483 2020 1 25 58873 0.0455 0.3059 -0.18468 2020 1 26 58874 0.0446 0.3072 -0.18459 2020 1 27 58875 0.0437 0.3086 -0.18460 2020 1 28 58876 0.0429 0.3100 -0.18473 2020 1 29 58877 0.0420 0.3114 -0.18496 2020 1 30 58878 0.0412 0.3128 -0.18527 2020 1 31 58879 0.0405 0.3143 -0.18563 2020 2 1 58880 0.0397 0.3157 -0.18599 2020 2 2 58881 0.0390 0.3172 -0.18630 2020 2 3 58882 0.0382 0.3186 -0.18654 2020 2 4 58883 0.0376 0.3201 -0.18667 2020 2 5 58884 0.0369 0.3216 -0.18671 2020 2 6 58885 0.0363 0.3231 -0.18667 2020 2 7 58886 0.0357 0.3246 -0.18661 2020 2 8 58887 0.0351 0.3262 -0.18664 2020 2 9 58888 0.0345 0.3277 -0.18684 2020 2 10 58889 0.0340 0.3292 -0.18728 2020 2 11 58890 0.0335 0.3308 -0.18798 2020 2 12 58891 0.0331 0.3323 -0.18886 2020 2 13 58892 0.0326 0.3339 -0.18982 2020 2 14 58893 0.0322 0.3355 -0.19073 2020 2 15 58894 0.0318 0.3371 -0.19148 2020 2 16 58895 0.0315 0.3386 -0.19201 2020 2 17 58896 0.0312 0.3402 -0.19232 2020 2 18 58897 0.0309 0.3418 -0.19244 2020 2 19 58898 0.0306 0.3434 -0.19244 2020 2 20 58899 0.0304 0.3450 -0.19239 2020 2 21 58900 0.0302 0.3467 -0.19236 2020 2 22 58901 0.0301 0.3483 -0.19240 2020 2 23 58902 0.0299 0.3499 -0.19255 2020 2 24 58903 0.0298 0.3515 -0.19281 2020 2 25 58904 0.0298 0.3531 -0.19317 2020 2 26 58905 0.0297 0.3548 -0.19361 2020 2 27 58906 0.0297 0.3564 -0.19410 2020 2 28 58907 0.0297 0.3580 -0.19459 2020 2 29 58908 0.0298 0.3597 -0.19503 2020 3 1 58909 0.0299 0.3613 -0.19539 2020 3 2 58910 0.0300 0.3629 -0.19566 2020 3 3 58911 0.0302 0.3646 -0.19583 2020 3 4 58912 0.0303 0.3662 -0.19592 2020 3 5 58913 0.0306 0.3678 -0.19596 2020 3 6 58914 0.0308 0.3695 -0.19603 2020 3 7 58915 0.0311 0.3711 -0.19623 2020 3 8 58916 0.0314 0.3727 -0.19666 2020 3 9 58917 0.0317 0.3743 -0.19737 2020 3 10 58918 0.0321 0.3759 -0.19834 2020 3 11 58919 0.0325 0.3775 -0.19947 2020 3 12 58920 0.0329 0.3791 -0.20062 2020 3 13 58921 0.0334 0.3807 -0.20167 2020 3 14 58922 0.0339 0.3823 -0.20251 2020 3 15 58923 0.0344 0.3839 -0.20312 2020 3 16 58924 0.0349 0.3855 -0.20351 2020 3 17 58925 0.0355 0.3871 -0.20374 2020 3 18 58926 0.0361 0.3886 -0.20391 2020 3 19 58927 0.0368 0.3902 -0.20407 2020 3 20 58928 0.0374 0.3917 -0.20430 2020 3 21 58929 0.0381 0.3932 -0.20463 2020 3 22 58930 0.0388 0.3948 -0.20508 2020 3 23 58931 0.0396 0.3963 -0.20564 2020 3 24 58932 0.0404 0.3978 -0.20631 2020 3 25 58933 0.0412 0.3993 -0.20705 2020 3 26 58934 0.0420 0.4007 -0.20781 2020 3 27 58935 0.0429 0.4022 -0.20855 2020 3 28 58936 0.0438 0.4037 -0.20922 2020 3 29 58937 0.0447 0.4051 -0.20979 2020 3 30 58938 0.0457 0.4065 -0.21025 2020 3 31 58939 0.0467 0.4079 -0.21062 2020 4 1 58940 0.0477 0.4093 -0.21093 2020 4 2 58941 0.0487 0.4107 -0.21124 2020 4 3 58942 0.0498 0.4121 -0.21163 2020 4 4 58943 0.0508 0.4134 -0.21221 2020 4 5 58944 0.0520 0.4148 -0.21304 2020 4 6 58945 0.0531 0.4161 -0.21414 2020 4 7 58946 0.0542 0.4174 -0.21548 2020 4 8 58947 0.0554 0.4187 -0.21692 2020 4 9 58948 0.0566 0.4199 -0.21832 2020 4 10 58949 0.0579 0.4212 -0.21953 2020 4 11 58950 0.0591 0.4224 -0.22049 2020 4 12 58951 0.0604 0.4236 -0.22118 2020 4 13 58952 0.0617 0.4248 -0.22166 2020 4 14 58953 0.0631 0.4259 -0.22201 2020 4 15 58954 0.0644 0.4271 -0.22232 2020 4 16 58955 0.0658 0.4282 -0.22265 2020 4 17 58956 0.0672 0.4293 -0.22307 2020 4 18 58957 0.0686 0.4304 -0.22359 2020 4 19 58958 0.0700 0.4315 -0.22421 2020 4 20 58959 0.0715 0.4325 -0.22487 2020 4 21 58960 0.0730 0.4335 -0.22558 2020 4 22 58961 0.0745 0.4345 -0.22632 2020 4 23 58962 0.0760 0.4355 -0.22702 2020 4 24 58963 0.0775 0.4364 -0.22765 2020 4 25 58964 0.0791 0.4374 -0.22816 2020 4 26 58965 0.0806 0.4383 -0.22853 2020 4 27 58966 0.0822 0.4391 -0.22878 2020 4 28 58967 0.0838 0.4400 -0.22893 2020 4 29 58968 0.0854 0.4408 -0.22903 2020 4 30 58969 0.0871 0.4416 -0.22917 2020 5 1 58970 0.0887 0.4424 -0.22943 2020 5 2 58971 0.0904 0.4431 -0.22988 2020 5 3 58972 0.0921 0.4438 -0.23058 2020 5 4 58973 0.0938 0.4445 -0.23151 2020 5 5 58974 0.0955 0.4452 -0.23260 2020 5 6 58975 0.0972 0.4458 -0.23372 2020 5 7 58976 0.0989 0.4465 -0.23472 2020 5 8 58977 0.1007 0.4471 -0.23550 2020 5 9 58978 0.1024 0.4476 -0.23600 2020 5 10 58979 0.1042 0.4481 -0.23624 2020 5 11 58980 0.1060 0.4487 -0.23631 2020 5 12 58981 0.1078 0.4491 -0.23628 2020 5 13 58982 0.1095 0.4496 -0.23625 2020 5 14 58983 0.1114 0.4500 -0.23627 2020 5 15 58984 0.1132 0.4504 -0.23637 2020 5 16 58985 0.1150 0.4508 -0.23657 2020 5 17 58986 0.1168 0.4511 -0.23685 2020 5 18 58987 0.1187 0.4514 -0.23719 2020 5 19 58988 0.1205 0.4517 -0.23755 2020 5 20 58989 0.1223 0.4519 -0.23788 2020 5 21 58990 0.1242 0.4522 -0.23814 2020 5 22 58991 0.1260 0.4524 -0.23829 2020 5 23 58992 0.1279 0.4525 -0.23830 2020 5 24 58993 0.1298 0.4526 -0.23816 2020 5 25 58994 0.1316 0.4527 -0.23790 2020 5 26 58995 0.1335 0.4528 -0.23758 2020 5 27 58996 0.1354 0.4529 -0.23726 2020 5 28 58997 0.1373 0.4529 -0.23703 2020 5 29 58998 0.1391 0.4529 -0.23696 2020 5 30 58999 0.1410 0.4528 -0.23709 2020 5 31 59000 0.1429 0.4528 -0.23743 2020 6 1 59001 0.1447 0.4526 -0.23795 2020 6 2 59002 0.1466 0.4525 -0.23853 2020 6 3 59003 0.1485 0.4524 -0.23907 2020 6 4 59004 0.1503 0.4522 -0.23944 2020 6 5 59005 0.1522 0.4519 -0.23956 2020 6 6 59006 0.1541 0.4517 -0.23943 2020 6 7 59007 0.1559 0.4514 -0.23908 2020 6 8 59008 0.1578 0.4511 -0.23862 2020 6 9 59009 0.1596 0.4508 -0.23812 2020 6 10 59010 0.1614 0.4504 -0.23765 2020 6 11 59011 0.1633 0.4500 -0.23727 2020 6 12 59012 0.1651 0.4496 -0.23697 2020 6 13 59013 0.1669 0.4491 -0.23677 2020 6 14 59014 0.1687 0.4486 -0.23663 2020 6 15 59015 0.1705 0.4481 -0.23652 2020 6 16 59016 0.1723 0.4476 -0.23640 2020 6 17 59017 0.1741 0.4470 -0.23621 2020 6 18 59018 0.1758 0.4464 -0.23592 2020 6 19 59019 0.1776 0.4458 -0.23550 2020 6 20 59020 0.1794 0.4451 -0.23493 2020 6 21 59021 0.1811 0.4444 -0.23423 2020 6 22 59022 0.1828 0.4437 -0.23345 2020 6 23 59023 0.1845 0.4430 -0.23265 2020 6 24 59024 0.1862 0.4422 -0.23191 2020 6 25 59025 0.1879 0.4414 -0.23131 2020 6 26 59026 0.1896 0.4406 -0.23090 2020 6 27 59027 0.1912 0.4397 -0.23068 2020 6 28 59028 0.1928 0.4389 -0.23061 2020 6 29 59029 0.1945 0.4380 -0.23061 2020 6 30 59030 0.1961 0.4370 -0.23057 2020 7 1 59031 0.1977 0.4361 -0.23038 2020 7 2 59032 0.1992 0.4351 -0.22996 2020 7 3 59033 0.2008 0.4341 -0.22927 2020 7 4 59034 0.2023 0.4331 -0.22835 2020 7 5 59035 0.2038 0.4320 -0.22725 2020 7 6 59036 0.2053 0.4310 -0.22607 2020 7 7 59037 0.2068 0.4299 -0.22488 2020 7 8 59038 0.2082 0.4287 -0.22376 2020 7 9 59039 0.2097 0.4276 -0.22274 2020 7 10 59040 0.2111 0.4264 -0.22185 2020 7 11 59041 0.2125 0.4252 -0.22108 2020 7 12 59042 0.2138 0.4240 -0.22042 2020 7 13 59043 0.2152 0.4228 -0.21982 2020 7 14 59044 0.2165 0.4215 -0.21923 2020 7 15 59045 0.2178 0.4202 -0.21862 2020 7 16 59046 0.2191 0.4189 -0.21793 2020 7 17 59047 0.2203 0.4176 -0.21714 2020 7 18 59048 0.2216 0.4163 -0.21626 2020 7 19 59049 0.2228 0.4149 -0.21532 2020 7 20 59050 0.2240 0.4135 -0.21437 2020 7 21 59051 0.2251 0.4121 -0.21351 2020 7 22 59052 0.2262 0.4107 -0.21284 2020 7 23 59053 0.2273 0.4093 -0.21241 2020 7 24 59054 0.2284 0.4078 -0.21225 2020 7 25 59055 0.2294 0.4063 -0.21232 2020 7 26 59056 0.2305 0.4048 -0.21254 2020 7 27 59057 0.2315 0.4033 -0.21279 2020 7 28 59058 0.2324 0.4018 -0.21297 2020 7 29 59059 0.2334 0.4003 -0.21300 2020 7 30 59060 0.2343 0.3987 -0.21285 2020 7 31 59061 0.2351 0.3971 -0.21254 2020 8 1 59062 0.2360 0.3956 -0.21211 2020 8 2 59063 0.2368 0.3940 -0.21165 2020 8 3 59064 0.2376 0.3924 -0.21121 2020 8 4 59065 0.2383 0.3907 -0.21083 2020 8 5 59066 0.2391 0.3891 -0.21056 2020 8 6 59067 0.2398 0.3874 -0.21040 2020 8 7 59068 0.2404 0.3858 -0.21035 2020 8 8 59069 0.2411 0.3841 -0.21037 2020 8 9 59070 0.2417 0.3824 -0.21042 2020 8 10 59071 0.2423 0.3807 -0.21044 2020 8 11 59072 0.2428 0.3790 -0.21040 2020 8 12 59073 0.2433 0.3773 -0.21025 2020 8 13 59074 0.2438 0.3756 -0.20998 2020 8 14 59075 0.2442 0.3739 -0.20965 2020 8 15 59076 0.2447 0.3721 -0.20927 2020 8 16 59077 0.2450 0.3704 -0.20891 2020 8 17 59078 0.2454 0.3686 -0.20859 2020 8 18 59079 0.2457 0.3669 -0.20837 2020 8 19 59080 0.2460 0.3651 -0.20838 2020 8 20 59081 0.2462 0.3634 -0.20869 2020 8 21 59082 0.2465 0.3616 -0.20920 2020 8 22 59083 0.2466 0.3598 -0.20985 2020 8 23 59084 0.2468 0.3580 -0.21054 2020 8 24 59085 0.2469 0.3562 -0.21112 2020 8 25 59086 0.2470 0.3545 -0.21155 2020 8 26 59087 0.2471 0.3527 -0.21180 2020 8 27 59088 0.2471 0.3509 -0.21184 2020 8 28 59089 0.2471 0.3491 -0.21177 2020 8 29 59090 0.2470 0.3473 -0.21163 2020 8 30 59091 0.2469 0.3455 -0.21148 2020 8 31 59092 0.2468 0.3437 -0.21138 2020 9 1 59093 0.2467 0.3419 -0.21139 2020 9 2 59094 0.2465 0.3402 -0.21158 2020 9 3 59095 0.2463 0.3384 -0.21188 2020 9 4 59096 0.2460 0.3366 -0.21235 2020 9 5 59097 0.2458 0.3348 -0.21288 2020 9 6 59098 0.2455 0.3330 -0.21339 2020 9 7 59099 0.2451 0.3313 -0.21382 2020 9 8 59100 0.2447 0.3295 -0.21411 2020 9 9 59101 0.2443 0.3278 -0.21428 2020 9 10 59102 0.2439 0.3260 -0.21436 2020 9 11 59103 0.2434 0.3243 -0.21437 2020 9 12 59104 0.2429 0.3225 -0.21435 2020 9 13 59105 0.2423 0.3208 -0.21436 2020 9 14 59106 0.2418 0.3191 -0.21444 2020 9 15 59107 0.2412 0.3174 -0.21470 2020 9 16 59108 0.2405 0.3157 -0.21520 2020 9 17 59109 0.2399 0.3140 -0.21596 2020 9 18 59110 0.2391 0.3123 -0.21697 2020 9 19 59111 0.2384 0.3106 -0.21816 2020 9 20 59112 0.2376 0.3089 -0.21936 2020 9 21 59113 0.2369 0.3073 -0.22036 2020 9 22 59114 0.2360 0.3056 -0.22107 2020 9 23 59115 0.2352 0.3040 -0.22150 2020 9 24 59116 0.2343 0.3024 -0.22179 2020 9 25 59117 0.2334 0.3008 -0.22198 2020 9 26 59118 0.2324 0.2992 -0.22210 2020 9 27 59119 0.2314 0.2976 -0.22226 2020 9 28 59120 0.2304 0.2961 -0.22246 2020 9 29 59121 0.2294 0.2945 -0.22276 2020 9 30 59122 0.2283 0.2930 -0.22320 2020 10 1 59123 0.2272 0.2915 -0.22378 2020 10 2 59124 0.2261 0.2900 -0.22440 2020 10 3 59125 0.2250 0.2885 -0.22504 2020 10 4 59126 0.2238 0.2871 -0.22570 2020 10 5 59127 0.2226 0.2857 -0.22629 2020 10 6 59128 0.2213 0.2842 -0.22678 2020 10 7 59129 0.2201 0.2828 -0.22714 2020 10 8 59130 0.2188 0.2815 -0.22743 2020 10 9 59131 0.2175 0.2801 -0.22769 2020 10 10 59132 0.2161 0.2788 -0.22792 2020 10 11 59133 0.2148 0.2774 -0.22829 2020 10 12 59134 0.2134 0.2761 -0.22885 2020 10 13 59135 0.2120 0.2749 -0.22967 2020 10 14 59136 0.2105 0.2736 -0.23075 2020 10 15 59137 0.2091 0.2724 -0.23209 2020 10 16 59138 0.2076 0.2712 -0.23359 2020 10 17 59139 0.2061 0.2700 -0.23518 2020 10 18 59140 0.2046 0.2688 -0.23668 2020 10 19 59141 0.2030 0.2677 -0.23792 2020 10 20 59142 0.2014 0.2666 -0.23888 2020 10 21 59143 0.1999 0.2655 -0.23960 2020 10 22 59144 0.1982 0.2644 -0.24016 2020 10 23 59145 0.1966 0.2634 -0.24064 2020 10 24 59146 0.1950 0.2624 -0.24113 2020 10 25 59147 0.1933 0.2614 -0.24172 2020 10 26 59148 0.1916 0.2604 -0.24240 2020 10 27 59149 0.1899 0.2595 -0.24319 2020 10 28 59150 0.1882 0.2586 -0.24410 2020 10 29 59151 0.1864 0.2577 -0.24508 2020 10 30 59152 0.1847 0.2569 -0.24607 2020 10 31 59153 0.1829 0.2560 -0.24701 2020 11 1 59154 0.1811 0.2552 -0.24783 2020 11 2 59155 0.1793 0.2545 -0.24853 2020 11 3 59156 0.1775 0.2537 -0.24912 2020 11 4 59157 0.1756 0.2530 -0.24957 2020 11 5 59158 0.1738 0.2523 -0.24994 2020 11 6 59159 0.1719 0.2517 -0.25026 2020 11 7 59160 0.1700 0.2511 -0.25055 2020 11 8 59161 0.1681 0.2505 -0.25092 2020 11 9 59162 0.1662 0.2499 -0.25149 2020 11 10 59163 0.1643 0.2494 -0.25231 2020 11 11 59164 0.1624 0.2489 -0.25340 2020 11 12 59165 0.1605 0.2484 -0.25467 2020 11 13 59166 0.1585 0.2480 -0.25603 2020 11 14 59167 0.1566 0.2476 -0.25740 2020 11 15 59168 0.1546 0.2472 -0.25859 2020 11 16 59169 0.1527 0.2468 -0.25952 2020 11 17 59170 0.1507 0.2465 -0.26020 2020 11 18 59171 0.1487 0.2462 -0.26066 2020 11 19 59172 0.1467 0.2460 -0.26106 2020 11 20 59173 0.1448 0.2458 -0.26141 2020 11 21 59174 0.1428 0.2456 -0.26183 2020 11 22 59175 0.1408 0.2454 -0.26238 2020 11 23 59176 0.1388 0.2453 -0.26305 2020 11 24 59177 0.1368 0.2452 -0.26386 2020 11 25 59178 0.1348 0.2451 -0.26474 2020 11 26 59179 0.1327 0.2451 -0.26569 2020 11 27 59180 0.1307 0.2451 -0.26662 2020 11 28 59181 0.1287 0.2451 -0.26751 2020 11 29 59182 0.1267 0.2452 -0.26832 2020 11 30 59183 0.1247 0.2453 -0.26905 2020 12 1 59184 0.1227 0.2454 -0.26967 2020 12 2 59185 0.1207 0.2456 -0.27019 2020 12 3 59186 0.1187 0.2458 -0.27069 2020 12 4 59187 0.1167 0.2460 -0.27123 2020 12 5 59188 0.1147 0.2463 -0.27182 2020 12 6 59189 0.1127 0.2466 -0.27258 2020 12 7 59190 0.1107 0.2469 -0.27352 2020 12 8 59191 0.1087 0.2473 -0.27465 2020 12 9 59192 0.1068 0.2477 -0.27600 2020 12 10 59193 0.1048 0.2481 -0.27748 2020 12 11 59194 0.1028 0.2485 -0.27899 2020 12 12 59195 0.1009 0.2490 -0.28041 2020 12 13 59196 0.0989 0.2495 -0.28165 2020 12 14 59197 0.0970 0.2501 -0.28262 2020 12 15 59198 0.0951 0.2506 -0.28337 2020 12 16 59199 0.0931 0.2513 -0.28390 2020 12 17 59200 0.0912 0.2519 -0.28435 2020 12 18 59201 0.0893 0.2526 -0.28488 2020 12 19 59202 0.0875 0.2533 -0.28551 2020 12 20 59203 0.0856 0.2540 -0.28632 2020 12 21 59204 0.0837 0.2548 -0.28726 2020 12 22 59205 0.0819 0.2555 -0.28828 2020 12 23 59206 0.0800 0.2564 -0.28938 2020 12 24 59207 0.0782 0.2572 -0.29043 2020 12 25 59208 0.0764 0.2581 -0.29137 2020 12 26 59209 0.0746 0.2590 -0.29220 2020 12 27 59210 0.0729 0.2599 -0.29288 2020 12 28 59211 0.0711 0.2609 -0.29340 2020 12 29 59212 0.0694 0.2619 -0.29382 2020 12 30 59213 0.0676 0.2629 -0.29416 2020 12 31 59214 0.0659 0.2640 -0.29447 2021 1 1 59215 0.0643 0.2651 -0.29480 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) 58828 -110.77 0.34 -6.03 0.18 58829 -110.72 0.34 -6.29 0.18 58830 -110.47 0.34 -6.53 0.18 IERS Celestial Pole Offset Final Series MJD dpsi deps (msec. of arc) 58789 -113.3 -8.6 58790 -113.0 -8.7 58791 -112.9 -8.5 58792 -112.7 -8.2 58793 -112.6 -8.1 58794 -112.5 -8.1 58795 -112.5 -8.1 58796 -112.4 -7.9 58797 -112.4 -7.6 58798 -112.4 -7.4 58799 -112.5 -7.3 58800 -112.6 -7.4 58801 -112.6 -7.5 58802 -112.4 -7.6 58803 -112.2 -7.6 58804 -112.0 -7.6 58805 -111.8 -7.6 58806 -111.5 -7.6 58807 -111.1 -7.4 58808 -110.6 -7.2 58809 -110.6 -6.9 58810 -111.0 -6.7 58811 -111.7 -6.8 58812 -112.1 -7.1 58813 -112.2 -7.3 58814 -111.9 -7.3 58815 -111.5 -7.2 58816 -111.2 -7.1 58817 -110.9 -7.2 58818 -110.6 -7.2 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 58828 0.141 0.136 0.125 0.179 58829 0.141 0.136 0.135 0.179 58830 0.143 0.136 0.144 0.179 IAU2000A Celestial Pole Offset Final Series MJD dX dY (msec. of arc) 58789 0.07 0.22 58790 0.10 0.23 58791 0.13 0.23 58792 0.15 0.24 58793 0.15 0.21 58794 0.13 0.17 58795 0.11 0.13 58796 0.10 0.13 58797 0.08 0.13 58798 0.06 0.13 58799 0.04 0.13 58800 0.03 0.16 58801 0.03 0.20 58802 0.03 0.24 58803 0.02 0.23 58804 0.05 0.20 58805 0.06 0.17 58806 0.07 0.13 58807 0.11 0.14 58808 0.15 0.15 58809 0.20 0.17 58810 0.17 0.18 58811 0.11 0.20 58812 0.06 0.22 58813 0.01 0.23 58814 0.02 0.22 58815 0.05 0.20 58816 0.08 0.18 58817 0.10 0.16 58818 0.14 0.14 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).