********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 6 February 2020 Vol. XXXIII No. 006 ______________________________________________________________________ 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. * * * * As of Bulletin A Vol. XXXIII, No. 005, 30 Jan 2020, we have * * incorporated the new USNO VLBI solutions -- usno2020a.eoxy and * * usno2020a.eopi. The effect appears to be less than 0.1 mas in * * polar motion and 10 us in UT1-UTC. * * * * 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 1 31 58879 0.04567 .00009 0.31296 .00009 -0.190538 0.000010 20 2 1 58880 0.04444 .00009 0.31441 .00009 -0.191171 0.000011 20 2 2 58881 0.04345 .00009 0.31600 .00009 -0.191714 0.000011 20 2 3 58882 0.04275 .00009 0.31767 .00009 -0.192183 0.000009 20 2 4 58883 0.04231 .00009 0.31940 .00009 -0.192517 0.000008 20 2 5 58884 0.04195 .00009 0.32114 .00009 -0.192709 0.000005 20 2 6 58885 0.04137 .00009 0.32280 .00009 -0.192820 0.000005 IERS Final Values MJD x y UT1-UTC " " s 19 12 2 58819 0.1213 0.2709 -0.17007 19 12 3 58820 0.1191 0.2714 -0.17021 19 12 4 58821 0.1162 0.2714 -0.17041 19 12 5 58822 0.1134 0.2713 -0.17068 19 12 6 58823 0.1112 0.2711 -0.17103 19 12 7 58824 0.1094 0.2711 -0.17145 19 12 8 58825 0.1078 0.2710 -0.17188 19 12 9 58826 0.1067 0.2709 -0.17226 19 12 10 58827 0.1059 0.2710 -0.17253 19 12 11 58828 0.1052 0.2710 -0.17265 19 12 12 58829 0.1049 0.2713 -0.17262 19 12 13 58830 0.1049 0.2720 -0.17247 19 12 14 58831 0.1044 0.2732 -0.17228 19 12 15 58832 0.1034 0.2742 -0.17210 19 12 16 58833 0.1015 0.2748 -0.17199 19 12 17 58834 0.0995 0.2751 -0.17202 19 12 18 58835 0.0975 0.2753 -0.17225 19 12 19 58836 0.0959 0.2757 -0.17270 19 12 20 58837 0.0951 0.2761 -0.17334 19 12 21 58838 0.0947 0.2764 -0.17408 19 12 22 58839 0.0945 0.2772 -0.17480 19 12 23 58840 0.0934 0.2784 -0.17538 19 12 24 58841 0.0918 0.2791 -0.17577 19 12 25 58842 0.0903 0.2796 -0.17602 19 12 26 58843 0.0885 0.2800 -0.17615 19 12 27 58844 0.0869 0.2807 -0.17621 19 12 28 58845 0.0851 0.2813 -0.17626 19 12 29 58846 0.0829 0.2817 -0.17634 19 12 30 58847 0.0803 0.2818 -0.17650 19 12 31 58848 0.0783 0.2819 -0.17676 20 1 1 58849 0.0766 0.2823 -0.17713 _______________________________________________________________________ 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 = 0.1185 - 0.0879 cos A - 0.0387 sin A + 0.0082 cos C + 0.0052 sin C y = 0.3516 - 0.0352 cos A + 0.0804 sin A + 0.0052 cos C - 0.0082 sin C UT1-UTC = -0.1927 - 0.00025 (MJD - 58893) - (UT2-UT1) where A = 2*pi*(MJD-58885)/365.25 and C = 2*pi*(MJD-58885)/435. TAI-UTC(MJD 58886) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58885)**0.80 S t = 0.00025 (MJD-58885)**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 2 7 58886 0.0407 0.3244 -0.19289 2020 2 8 58887 0.0399 0.3258 -0.19302 2020 2 9 58888 0.0391 0.3272 -0.19331 2020 2 10 58889 0.0384 0.3285 -0.19386 2020 2 11 58890 0.0379 0.3299 -0.19467 2020 2 12 58891 0.0374 0.3313 -0.19567 2020 2 13 58892 0.0370 0.3327 -0.19673 2020 2 14 58893 0.0366 0.3342 -0.19773 2020 2 15 58894 0.0362 0.3357 -0.19859 2020 2 16 58895 0.0358 0.3372 -0.19926 2020 2 17 58896 0.0354 0.3387 -0.19971 2020 2 18 58897 0.0351 0.3402 -0.19998 2020 2 19 58898 0.0348 0.3417 -0.20015 2020 2 20 58899 0.0346 0.3431 -0.20028 2020 2 21 58900 0.0344 0.3446 -0.20047 2020 2 22 58901 0.0342 0.3460 -0.20078 2020 2 23 58902 0.0341 0.3475 -0.20126 2020 2 24 58903 0.0340 0.3490 -0.20190 2020 2 25 58904 0.0339 0.3505 -0.20270 2020 2 26 58905 0.0339 0.3521 -0.20362 2020 2 27 58906 0.0338 0.3536 -0.20463 2020 2 28 58907 0.0338 0.3551 -0.20566 2020 2 29 58908 0.0339 0.3566 -0.20664 2020 3 1 58909 0.0339 0.3581 -0.20752 2020 3 2 58910 0.0340 0.3596 -0.20827 2020 3 3 58911 0.0341 0.3611 -0.20887 2020 3 4 58912 0.0343 0.3627 -0.20936 2020 3 5 58913 0.0345 0.3642 -0.20979 2020 3 6 58914 0.0347 0.3657 -0.21025 2020 3 7 58915 0.0350 0.3672 -0.21085 2020 3 8 58916 0.0352 0.3687 -0.21168 2020 3 9 58917 0.0355 0.3702 -0.21279 2020 3 10 58918 0.0359 0.3717 -0.21415 2020 3 11 58919 0.0362 0.3732 -0.21568 2020 3 12 58920 0.0366 0.3747 -0.21721 2020 3 13 58921 0.0370 0.3762 -0.21862 2020 3 14 58922 0.0375 0.3777 -0.21978 2020 3 15 58923 0.0380 0.3791 -0.22068 2020 3 16 58924 0.0385 0.3806 -0.22133 2020 3 17 58925 0.0390 0.3821 -0.22180 2020 3 18 58926 0.0396 0.3835 -0.22218 2020 3 19 58927 0.0402 0.3850 -0.22254 2020 3 20 58928 0.0408 0.3864 -0.22295 2020 3 21 58929 0.0414 0.3878 -0.22344 2020 3 22 58930 0.0421 0.3893 -0.22404 2020 3 23 58931 0.0428 0.3907 -0.22475 2020 3 24 58932 0.0436 0.3921 -0.22556 2020 3 25 58933 0.0443 0.3935 -0.22641 2020 3 26 58934 0.0451 0.3948 -0.22728 2020 3 27 58935 0.0459 0.3962 -0.22810 2020 3 28 58936 0.0468 0.3976 -0.22884 2020 3 29 58937 0.0477 0.3989 -0.22946 2020 3 30 58938 0.0486 0.4002 -0.22997 2020 3 31 58939 0.0495 0.4016 -0.23037 2020 4 1 58940 0.0504 0.4029 -0.23070 2020 4 2 58941 0.0514 0.4042 -0.23103 2020 4 3 58942 0.0524 0.4054 -0.23144 2020 4 4 58943 0.0534 0.4067 -0.23202 2020 4 5 58944 0.0545 0.4079 -0.23285 2020 4 6 58945 0.0556 0.4092 -0.23395 2020 4 7 58946 0.0567 0.4104 -0.23526 2020 4 8 58947 0.0578 0.4116 -0.23666 2020 4 9 58948 0.0589 0.4128 -0.23801 2020 4 10 58949 0.0601 0.4139 -0.23916 2020 4 11 58950 0.0613 0.4151 -0.24005 2020 4 12 58951 0.0625 0.4162 -0.24066 2020 4 13 58952 0.0638 0.4173 -0.24105 2020 4 14 58953 0.0650 0.4184 -0.24132 2020 4 15 58954 0.0663 0.4195 -0.24153 2020 4 16 58955 0.0676 0.4206 -0.24176 2020 4 17 58956 0.0689 0.4216 -0.24204 2020 4 18 58957 0.0703 0.4226 -0.24242 2020 4 19 58958 0.0716 0.4236 -0.24288 2020 4 20 58959 0.0730 0.4246 -0.24342 2020 4 21 58960 0.0744 0.4255 -0.24401 2020 4 22 58961 0.0759 0.4265 -0.24460 2020 4 23 58962 0.0773 0.4274 -0.24515 2020 4 24 58963 0.0788 0.4283 -0.24561 2020 4 25 58964 0.0802 0.4291 -0.24596 2020 4 26 58965 0.0817 0.4300 -0.24616 2020 4 27 58966 0.0832 0.4308 -0.24623 2020 4 28 58967 0.0848 0.4316 -0.24620 2020 4 29 58968 0.0863 0.4324 -0.24611 2020 4 30 58969 0.0879 0.4331 -0.24606 2020 5 1 58970 0.0894 0.4339 -0.24612 2020 5 2 58971 0.0910 0.4346 -0.24638 2020 5 3 58972 0.0926 0.4353 -0.24689 2020 5 4 58973 0.0943 0.4359 -0.24764 2020 5 5 58974 0.0959 0.4366 -0.24856 2020 5 6 58975 0.0975 0.4372 -0.24951 2020 5 7 58976 0.0992 0.4377 -0.25034 2020 5 8 58977 0.1008 0.4383 -0.25096 2020 5 9 58978 0.1025 0.4388 -0.25130 2020 5 10 58979 0.1042 0.4393 -0.25139 2020 5 11 58980 0.1059 0.4398 -0.25131 2020 5 12 58981 0.1076 0.4403 -0.25113 2020 5 13 58982 0.1093 0.4407 -0.25096 2020 5 14 58983 0.1110 0.4411 -0.25083 2020 5 15 58984 0.1128 0.4415 -0.25079 2020 5 16 58985 0.1145 0.4418 -0.25085 2020 5 17 58986 0.1163 0.4421 -0.25100 2020 5 18 58987 0.1180 0.4424 -0.25120 2020 5 19 58988 0.1198 0.4427 -0.25143 2020 5 20 58989 0.1215 0.4429 -0.25164 2020 5 21 58990 0.1233 0.4432 -0.25177 2020 5 22 58991 0.1251 0.4433 -0.25180 2020 5 23 58992 0.1269 0.4435 -0.25170 2020 5 24 58993 0.1286 0.4436 -0.25145 2020 5 25 58994 0.1304 0.4437 -0.25110 2020 5 26 58995 0.1322 0.4438 -0.25069 2020 5 27 58996 0.1340 0.4439 -0.25027 2020 5 28 58997 0.1358 0.4439 -0.24994 2020 5 29 58998 0.1376 0.4439 -0.24977 2020 5 30 58999 0.1394 0.4438 -0.24980 2020 5 31 59000 0.1412 0.4438 -0.25005 2020 6 1 59001 0.1429 0.4437 -0.25046 2020 6 2 59002 0.1447 0.4436 -0.25094 2020 6 3 59003 0.1465 0.4434 -0.25137 2020 6 4 59004 0.1483 0.4432 -0.25163 2020 6 5 59005 0.1501 0.4430 -0.25164 2020 6 6 59006 0.1519 0.4428 -0.25140 2020 6 7 59007 0.1536 0.4426 -0.25094 2020 6 8 59008 0.1554 0.4423 -0.25036 2020 6 9 59009 0.1572 0.4420 -0.24974 2020 6 10 59010 0.1589 0.4416 -0.24915 2020 6 11 59011 0.1607 0.4412 -0.24864 2020 6 12 59012 0.1624 0.4409 -0.24822 2020 6 13 59013 0.1641 0.4404 -0.24789 2020 6 14 59014 0.1659 0.4400 -0.24762 2020 6 15 59015 0.1676 0.4395 -0.24738 2020 6 16 59016 0.1693 0.4390 -0.24712 2020 6 17 59017 0.1710 0.4385 -0.24680 2020 6 18 59018 0.1727 0.4379 -0.24637 2020 6 19 59019 0.1744 0.4373 -0.24582 2020 6 20 59020 0.1760 0.4367 -0.24512 2020 6 21 59021 0.1777 0.4361 -0.24430 2020 6 22 59022 0.1793 0.4354 -0.24339 2020 6 23 59023 0.1810 0.4347 -0.24247 2020 6 24 59024 0.1826 0.4340 -0.24163 2020 6 25 59025 0.1842 0.4333 -0.24093 2020 6 26 59026 0.1858 0.4325 -0.24043 2020 6 27 59027 0.1874 0.4317 -0.24014 2020 6 28 59028 0.1889 0.4309 -0.24002 2020 6 29 59029 0.1905 0.4301 -0.23998 2020 6 30 59030 0.1920 0.4292 -0.23993 2020 7 1 59031 0.1935 0.4283 -0.23975 2020 7 2 59032 0.1950 0.4274 -0.23937 2020 7 3 59033 0.1965 0.4265 -0.23877 2020 7 4 59034 0.1980 0.4255 -0.23796 2020 7 5 59035 0.1994 0.4245 -0.23702 2020 7 6 59036 0.2008 0.4235 -0.23602 2020 7 7 59037 0.2022 0.4225 -0.23506 2020 7 8 59038 0.2036 0.4214 -0.23418 2020 7 9 59039 0.2050 0.4204 -0.23341 2020 7 10 59040 0.2063 0.4193 -0.23275 2020 7 11 59041 0.2077 0.4182 -0.23217 2020 7 12 59042 0.2090 0.4170 -0.23165 2020 7 13 59043 0.2102 0.4159 -0.23113 2020 7 14 59044 0.2115 0.4147 -0.23058 2020 7 15 59045 0.2127 0.4135 -0.22995 2020 7 16 59046 0.2139 0.4123 -0.22922 2020 7 17 59047 0.2151 0.4110 -0.22837 2020 7 18 59048 0.2163 0.4098 -0.22740 2020 7 19 59049 0.2174 0.4085 -0.22635 2020 7 20 59050 0.2186 0.4072 -0.22528 2020 7 21 59051 0.2197 0.4059 -0.22427 2020 7 22 59052 0.2207 0.4046 -0.22342 2020 7 23 59053 0.2218 0.4032 -0.22279 2020 7 24 59054 0.2228 0.4018 -0.22239 2020 7 25 59055 0.2238 0.4005 -0.22219 2020 7 26 59056 0.2247 0.3991 -0.22208 2020 7 27 59057 0.2257 0.3976 -0.22197 2020 7 28 59058 0.2266 0.3962 -0.22175 2020 7 29 59059 0.2275 0.3948 -0.22134 2020 7 30 59060 0.2283 0.3933 -0.22070 2020 7 31 59061 0.2292 0.3919 -0.21986 2020 8 1 59062 0.2300 0.3904 -0.21888 2020 8 2 59063 0.2307 0.3889 -0.21782 2020 8 3 59064 0.2315 0.3874 -0.21676 2020 8 4 59065 0.2322 0.3858 -0.21576 2020 8 5 59066 0.2329 0.3843 -0.21485 2020 8 6 59067 0.2335 0.3828 -0.21403 2020 8 7 59068 0.2342 0.3812 -0.21327 2020 8 8 59069 0.2347 0.3796 -0.21253 2020 8 9 59070 0.2353 0.3780 -0.21176 2020 8 10 59071 0.2359 0.3765 -0.21091 2020 8 11 59072 0.2364 0.3749 -0.20993 2020 8 12 59073 0.2368 0.3733 -0.20881 2020 8 13 59074 0.2373 0.3716 -0.20754 2020 8 14 59075 0.2377 0.3700 -0.20617 2020 8 15 59076 0.2381 0.3684 -0.20474 2020 8 16 59077 0.2384 0.3668 -0.20337 2020 8 17 59078 0.2387 0.3651 -0.20214 2020 8 18 59079 0.2390 0.3635 -0.20118 2020 8 19 59080 0.2393 0.3618 -0.20057 2020 8 20 59081 0.2395 0.3602 -0.20033 2020 8 21 59082 0.2397 0.3585 -0.20042 2020 8 22 59083 0.2399 0.3568 -0.20074 2020 8 23 59084 0.2400 0.3552 -0.20114 2020 8 24 59085 0.2401 0.3535 -0.20147 2020 8 25 59086 0.2402 0.3518 -0.20164 2020 8 26 59087 0.2402 0.3502 -0.20161 2020 8 27 59088 0.2402 0.3485 -0.20139 2020 8 28 59089 0.2402 0.3468 -0.20104 2020 8 29 59090 0.2401 0.3451 -0.20064 2020 8 30 59091 0.2400 0.3434 -0.20027 2020 8 31 59092 0.2399 0.3418 -0.19998 2020 9 1 59093 0.2397 0.3401 -0.19981 2020 9 2 59094 0.2395 0.3384 -0.19978 2020 9 3 59095 0.2393 0.3367 -0.19987 2020 9 4 59096 0.2390 0.3351 -0.20004 2020 9 5 59097 0.2388 0.3334 -0.20026 2020 9 6 59098 0.2384 0.3318 -0.20048 2020 9 7 59099 0.2381 0.3301 -0.20063 2020 9 8 59100 0.2377 0.3284 -0.20071 2020 9 9 59101 0.2373 0.3268 -0.20069 2020 9 10 59102 0.2368 0.3251 -0.20059 2020 9 11 59103 0.2364 0.3235 -0.20041 2020 9 12 59104 0.2359 0.3219 -0.20019 2020 9 13 59105 0.2353 0.3203 -0.19995 2020 9 14 59106 0.2347 0.3186 -0.19979 2020 9 15 59107 0.2341 0.3170 -0.19979 2020 9 16 59108 0.2335 0.3154 -0.20007 2020 9 17 59109 0.2328 0.3139 -0.20068 2020 9 18 59110 0.2321 0.3123 -0.20157 2020 9 19 59111 0.2314 0.3107 -0.20262 2020 9 20 59112 0.2307 0.3091 -0.20365 2020 9 21 59113 0.2299 0.3076 -0.20448 2020 9 22 59114 0.2291 0.3061 -0.20505 2020 9 23 59115 0.2282 0.3045 -0.20538 2020 9 24 59116 0.2273 0.3030 -0.20557 2020 9 25 59117 0.2264 0.3015 -0.20562 2020 9 26 59118 0.2255 0.3000 -0.20565 2020 9 27 59119 0.2246 0.2986 -0.20577 2020 9 28 59120 0.2236 0.2971 -0.20610 2020 9 29 59121 0.2225 0.2957 -0.20662 2020 9 30 59122 0.2215 0.2942 -0.20728 2020 10 1 59123 0.2204 0.2928 -0.20805 2020 10 2 59124 0.2193 0.2914 -0.20889 2020 10 3 59125 0.2182 0.2901 -0.20973 2020 10 4 59126 0.2171 0.2887 -0.21056 2020 10 5 59127 0.2159 0.2874 -0.21135 2020 10 6 59128 0.2147 0.2860 -0.21208 2020 10 7 59129 0.2134 0.2847 -0.21275 2020 10 8 59130 0.2122 0.2834 -0.21332 2020 10 9 59131 0.2109 0.2822 -0.21385 2020 10 10 59132 0.2096 0.2809 -0.21439 2020 10 11 59133 0.2083 0.2797 -0.21496 2020 10 12 59134 0.2069 0.2785 -0.21567 2020 10 13 59135 0.2056 0.2773 -0.21659 2020 10 14 59136 0.2042 0.2761 -0.21776 2020 10 15 59137 0.2027 0.2750 -0.21919 2020 10 16 59138 0.2013 0.2738 -0.22084 2020 10 17 59139 0.1998 0.2727 -0.22253 2020 10 18 59140 0.1983 0.2716 -0.22408 2020 10 19 59141 0.1968 0.2706 -0.22540 2020 10 20 59142 0.1953 0.2695 -0.22642 2020 10 21 59143 0.1938 0.2685 -0.22718 2020 10 22 59144 0.1922 0.2675 -0.22777 2020 10 23 59145 0.1906 0.2666 -0.22833 2020 10 24 59146 0.1890 0.2656 -0.22897 2020 10 25 59147 0.1874 0.2647 -0.22974 2020 10 26 59148 0.1857 0.2638 -0.23062 2020 10 27 59149 0.1841 0.2630 -0.23158 2020 10 28 59150 0.1824 0.2621 -0.23264 2020 10 29 59151 0.1807 0.2613 -0.23379 2020 10 30 59152 0.1790 0.2605 -0.23490 2020 10 31 59153 0.1773 0.2597 -0.23597 2020 11 1 59154 0.1756 0.2590 -0.23696 2020 11 2 59155 0.1738 0.2583 -0.23780 2020 11 3 59156 0.1720 0.2576 -0.23855 2020 11 4 59157 0.1703 0.2570 -0.23919 2020 11 5 59158 0.1685 0.2563 -0.23975 2020 11 6 59159 0.1667 0.2557 -0.24029 2020 11 7 59160 0.1649 0.2551 -0.24085 2020 11 8 59161 0.1630 0.2546 -0.24148 2020 11 9 59162 0.1612 0.2541 -0.24224 2020 11 10 59163 0.1593 0.2536 -0.24325 2020 11 11 59164 0.1575 0.2531 -0.24454 2020 11 12 59165 0.1556 0.2527 -0.24605 2020 11 13 59166 0.1538 0.2523 -0.24774 2020 11 14 59167 0.1519 0.2519 -0.24942 2020 11 15 59168 0.1500 0.2516 -0.25089 2020 11 16 59169 0.1481 0.2513 -0.25205 2020 11 17 59170 0.1462 0.2510 -0.25289 2020 11 18 59171 0.1443 0.2507 -0.25349 2020 11 19 59172 0.1424 0.2505 -0.25400 2020 11 20 59173 0.1404 0.2503 -0.25449 2020 11 21 59174 0.1385 0.2502 -0.25508 2020 11 22 59175 0.1366 0.2500 -0.25578 2020 11 23 59176 0.1347 0.2499 -0.25654 2020 11 24 59177 0.1327 0.2498 -0.25738 2020 11 25 59178 0.1308 0.2498 -0.25825 2020 11 26 59179 0.1289 0.2498 -0.25910 2020 11 27 59180 0.1269 0.2498 -0.25993 2020 11 28 59181 0.1250 0.2498 -0.26074 2020 11 29 59182 0.1231 0.2499 -0.26148 2020 11 30 59183 0.1211 0.2500 -0.26206 2020 12 1 59184 0.1192 0.2502 -0.26245 2020 12 2 59185 0.1173 0.2503 -0.26269 2020 12 3 59186 0.1153 0.2505 -0.26290 2020 12 4 59187 0.1134 0.2508 -0.26310 2020 12 5 59188 0.1115 0.2510 -0.26332 2020 12 6 59189 0.1096 0.2513 -0.26364 2020 12 7 59190 0.1077 0.2516 -0.26411 2020 12 8 59191 0.1058 0.2520 -0.26477 2020 12 9 59192 0.1039 0.2523 -0.26564 2020 12 10 59193 0.1020 0.2528 -0.26668 2020 12 11 59194 0.1001 0.2532 -0.26775 2020 12 12 59195 0.0982 0.2537 -0.26871 2020 12 13 59196 0.0963 0.2542 -0.26952 2020 12 14 59197 0.0945 0.2547 -0.27009 2020 12 15 59198 0.0926 0.2552 -0.27042 2020 12 16 59199 0.0908 0.2558 -0.27061 2020 12 17 59200 0.0890 0.2564 -0.27078 2020 12 18 59201 0.0871 0.2571 -0.27105 2020 12 19 59202 0.0853 0.2578 -0.27139 2020 12 20 59203 0.0835 0.2585 -0.27193 2020 12 21 59204 0.0818 0.2592 -0.27262 2020 12 22 59205 0.0800 0.2600 -0.27339 2020 12 23 59206 0.0782 0.2607 -0.27416 2020 12 24 59207 0.0765 0.2616 -0.27490 2020 12 25 59208 0.0748 0.2624 -0.27554 2020 12 26 59209 0.0731 0.2633 -0.27612 2020 12 27 59210 0.0714 0.2642 -0.27659 2020 12 28 59211 0.0697 0.2651 -0.27688 2020 12 29 59212 0.0680 0.2660 -0.27705 2020 12 30 59213 0.0664 0.2670 -0.27715 2020 12 31 59214 0.0648 0.2680 -0.27723 2021 1 1 59215 0.0632 0.2691 -0.27735 2021 1 2 59216 0.0616 0.2701 -0.27758 2021 1 3 59217 0.0600 0.2712 -0.27801 2021 1 4 59218 0.0585 0.2723 -0.27863 2021 1 5 59219 0.0570 0.2734 -0.27944 2021 1 6 59220 0.0555 0.2746 -0.28043 2021 1 7 59221 0.0540 0.2758 -0.28147 2021 1 8 59222 0.0525 0.2770 -0.28244 2021 1 9 59223 0.0511 0.2782 -0.28323 2021 1 10 59224 0.0497 0.2794 -0.28376 2021 1 11 59225 0.0483 0.2807 -0.28408 2021 1 12 59226 0.0469 0.2820 -0.28425 2021 1 13 59227 0.0455 0.2833 -0.28436 2021 1 14 59228 0.0442 0.2847 -0.28453 2021 1 15 59229 0.0429 0.2860 -0.28479 2021 1 16 59230 0.0417 0.2874 -0.28514 2021 1 17 59231 0.0404 0.2888 -0.28561 2021 1 18 59232 0.0392 0.2902 -0.28618 2021 1 19 59233 0.0380 0.2917 -0.28682 2021 1 20 59234 0.0368 0.2932 -0.28745 2021 1 21 59235 0.0357 0.2946 -0.28799 2021 1 22 59236 0.0346 0.2961 -0.28841 2021 1 23 59237 0.0335 0.2977 -0.28875 2021 1 24 59238 0.0325 0.2992 -0.28896 2021 1 25 59239 0.0314 0.3008 -0.28904 2021 1 26 59240 0.0304 0.3023 -0.28905 2021 1 27 59241 0.0295 0.3039 -0.28905 2021 1 28 59242 0.0285 0.3055 -0.28913 2021 1 29 59243 0.0276 0.3071 -0.28931 2021 1 30 59244 0.0267 0.3088 -0.28971 2021 1 31 59245 0.0259 0.3104 -0.29036 2021 2 1 59246 0.0251 0.3121 -0.29125 2021 2 2 59247 0.0243 0.3138 -0.29235 2021 2 3 59248 0.0235 0.3155 -0.29352 2021 2 4 59249 0.0228 0.3172 -0.29470 2021 2 5 59250 0.0221 0.3189 -0.29573 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) 58863 -107.77 0.45 -6.19 0.07 58864 -107.90 0.45 -6.28 0.07 58865 -108.14 0.45 -6.37 0.07 58866 -108.44 0.52 -6.41 0.08 58867 -108.78 0.52 -6.42 0.08 58868 -109.08 0.49 -6.42 0.08 58869 -109.19 0.25 -6.40 0.09 58870 -109.03 0.25 -6.39 0.09 IERS Celestial Pole Offset Final Series MJD dpsi deps (msec. of arc) 58819 -110.5 -7.2 58820 -110.3 -7.0 58821 -110.3 -6.9 58822 -110.3 -7.0 58823 -110.4 -7.0 58824 -110.5 -6.9 58825 -110.6 -6.6 58826 -110.7 -6.3 58827 -110.9 -6.1 58828 -111.1 -6.2 58829 -111.0 -6.5 58830 -110.8 -6.7 58831 -110.3 -6.8 58832 -109.8 -6.7 58833 -109.3 -6.5 58834 -108.9 -6.4 58835 -108.6 -6.3 58836 -108.6 -6.3 58837 -108.9 -6.4 58838 -109.3 -6.3 58839 -109.7 -6.4 58840 -109.9 -6.5 58841 -109.9 -6.6 58842 -109.6 -6.6 58843 -109.4 -6.5 58844 -109.2 -6.4 58845 -109.0 -6.4 58846 -108.8 -6.5 58847 -108.7 -6.5 58848 -108.7 -6.5 58849 -108.7 -6.5 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 58863 0.157 0.178 -0.020 0.072 58864 0.176 0.178 -0.038 0.072 58865 0.190 0.178 -0.053 0.072 58866 0.194 0.208 -0.058 0.078 58867 0.187 0.208 -0.053 0.078 58868 0.173 0.194 -0.039 0.081 58869 0.153 0.099 -0.019 0.090 58870 0.130 0.099 0.003 0.090 IAU2000A Celestial Pole Offset Final Series MJD dX dY (msec. of arc) 58819 0.14 0.07 58820 0.19 0.09 58821 0.20 0.09 58822 0.19 0.07 58823 0.19 0.05 58824 0.16 0.04 58825 0.12 0.02 58826 0.07 0.01 58827 0.03 -0.01 58828 0.01 -0.01 58829 0.01 -0.01 58830 -0.01 -0.01 58831 0.04 0.02 58832 0.11 0.06 58833 0.18 0.10 58834 0.24 0.14 58835 0.31 0.17 58836 0.25 0.12 58837 0.16 0.03 58838 0.17 0.01 58839 0.21 0.01 58840 0.25 0.01 58841 0.30 0.01 58842 0.28 0.06 58843 0.25 0.11 58844 0.22 0.17 58845 0.22 0.16 58846 0.23 0.12 58847 0.25 0.08 58848 0.26 0.04 58849 0.30 0.06 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).