********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 4 June 2020 Vol. XXXIII No. 023 ______________________________________________________________________ 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 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. * * * * 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. 022, 28 May 2020, we have fully * * incorporated the new USNO VLBI solutions -- usn2020b.eoxy and * * usn2020b.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 5 29 58998 0.11099 .00009 0.44341 .00009 -0.253548 0.000008 20 5 30 58999 0.11201 .00009 0.44291 .00009 -0.253715 0.000007 20 5 31 59000 0.11308 .00009 0.44235 .00009 -0.254087 0.000007 20 6 1 59001 0.11414 .00009 0.44164 .00009 -0.254635 0.000006 20 6 2 59002 0.11534 .00009 0.44101 .00009 -0.255253 0.000006 20 6 3 59003 0.11660 .00009 0.44061 .00009 -0.255795 0.000006 20 6 4 59004 0.11796 .00009 0.44039 .00009 -0.256146 0.000055 IERS Final Values MJD x y UT1-UTC " " s 20 4 2 58941 0.0527 0.4032 -0.22542 20 4 3 58942 0.0540 0.4052 -0.22581 20 4 4 58943 0.0550 0.4068 -0.22642 20 4 5 58944 0.0554 0.4080 -0.22733 20 4 6 58945 0.0560 0.4089 -0.22854 20 4 7 58946 0.0562 0.4094 -0.23002 20 4 8 58947 0.0569 0.4099 -0.23162 20 4 9 58948 0.0577 0.4110 -0.23321 20 4 10 58949 0.0581 0.4120 -0.23462 20 4 11 58950 0.0585 0.4130 -0.23576 20 4 12 58951 0.0591 0.4140 -0.23661 20 4 13 58952 0.0598 0.4154 -0.23721 20 4 14 58953 0.0610 0.4167 -0.23760 20 4 15 58954 0.0621 0.4181 -0.23786 20 4 16 58955 0.0629 0.4197 -0.23805 20 4 17 58956 0.0638 0.4214 -0.23826 20 4 18 58957 0.0646 0.4230 -0.23859 20 4 19 58958 0.0644 0.4243 -0.23902 20 4 20 58959 0.0638 0.4251 -0.23950 20 4 21 58960 0.0632 0.4259 -0.24000 20 4 22 58961 0.0633 0.4265 -0.24050 20 4 23 58962 0.0642 0.4273 -0.24097 20 4 24 58963 0.0655 0.4282 -0.24139 20 4 25 58964 0.0671 0.4293 -0.24169 20 4 26 58965 0.0684 0.4308 -0.24185 20 4 27 58966 0.0694 0.4320 -0.24198 20 4 28 58967 0.0707 0.4329 -0.24207 20 4 29 58968 0.0722 0.4337 -0.24213 20 4 30 58969 0.0742 0.4346 -0.24224 20 5 1 58970 0.0759 0.4359 -0.24247 _______________________________________________________________________ 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 = 0.1110 - 0.0114 cos A + 0.1030 sin A + 0.0215 cos C - 0.0029 sin C y = 0.3471 + 0.0952 cos A + 0.0099 sin A - 0.0029 cos C - 0.0215 sin C UT1-UTC = -0.2263 - 0.00014 (MJD - 59012) - (UT2-UT1) where A = 2*pi*(MJD-59004)/365.25 and C = 2*pi*(MJD-59004)/435. TAI-UTC(MJD 59005) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59004)**0.80 S t = 0.00025 (MJD-59004)**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 6 5 59005 0.1194 0.4402 -0.25626 2020 6 6 59006 0.1210 0.4402 -0.25611 2020 6 7 59007 0.1225 0.4402 -0.25576 2020 6 8 59008 0.1241 0.4401 -0.25526 2020 6 9 59009 0.1257 0.4401 -0.25467 2020 6 10 59010 0.1273 0.4400 -0.25405 2020 6 11 59011 0.1289 0.4399 -0.25346 2020 6 12 59012 0.1305 0.4399 -0.25294 2020 6 13 59013 0.1322 0.4398 -0.25252 2020 6 14 59014 0.1339 0.4397 -0.25221 2020 6 15 59015 0.1355 0.4396 -0.25200 2020 6 16 59016 0.1372 0.4395 -0.25181 2020 6 17 59017 0.1388 0.4394 -0.25157 2020 6 18 59018 0.1404 0.4392 -0.25125 2020 6 19 59019 0.1420 0.4390 -0.25081 2020 6 20 59020 0.1437 0.4388 -0.25024 2020 6 21 59021 0.1453 0.4386 -0.24957 2020 6 22 59022 0.1470 0.4383 -0.24884 2020 6 23 59023 0.1486 0.4380 -0.24810 2020 6 24 59024 0.1502 0.4377 -0.24746 2020 6 25 59025 0.1518 0.4374 -0.24697 2020 6 26 59026 0.1534 0.4370 -0.24669 2020 6 27 59027 0.1550 0.4366 -0.24661 2020 6 28 59028 0.1566 0.4362 -0.24669 2020 6 29 59029 0.1582 0.4357 -0.24687 2020 6 30 59030 0.1598 0.4353 -0.24702 2020 7 1 59031 0.1613 0.4348 -0.24702 2020 7 2 59032 0.1629 0.4342 -0.24681 2020 7 3 59033 0.1644 0.4337 -0.24636 2020 7 4 59034 0.1660 0.4331 -0.24568 2020 7 5 59035 0.1675 0.4325 -0.24486 2020 7 6 59036 0.1690 0.4319 -0.24396 2020 7 7 59037 0.1705 0.4312 -0.24307 2020 7 8 59038 0.1720 0.4306 -0.24224 2020 7 9 59039 0.1735 0.4299 -0.24149 2020 7 10 59040 0.1749 0.4291 -0.24084 2020 7 11 59041 0.1764 0.4284 -0.24026 2020 7 12 59042 0.1778 0.4276 -0.23974 2020 7 13 59043 0.1792 0.4268 -0.23922 2020 7 14 59044 0.1806 0.4260 -0.23868 2020 7 15 59045 0.1820 0.4252 -0.23807 2020 7 16 59046 0.1833 0.4243 -0.23736 2020 7 17 59047 0.1847 0.4234 -0.23653 2020 7 18 59048 0.1860 0.4225 -0.23558 2020 7 19 59049 0.1873 0.4216 -0.23454 2020 7 20 59050 0.1886 0.4206 -0.23346 2020 7 21 59051 0.1899 0.4196 -0.23243 2020 7 22 59052 0.1911 0.4186 -0.23154 2020 7 23 59053 0.1924 0.4176 -0.23086 2020 7 24 59054 0.1936 0.4166 -0.23040 2020 7 25 59055 0.1948 0.4155 -0.23014 2020 7 26 59056 0.1960 0.4145 -0.22999 2020 7 27 59057 0.1971 0.4134 -0.22983 2020 7 28 59058 0.1982 0.4122 -0.22958 2020 7 29 59059 0.1993 0.4111 -0.22914 2020 7 30 59060 0.2004 0.4100 -0.22851 2020 7 31 59061 0.2015 0.4088 -0.22768 2020 8 1 59062 0.2025 0.4076 -0.22674 2020 8 2 59063 0.2035 0.4064 -0.22575 2020 8 3 59064 0.2045 0.4052 -0.22479 2020 8 4 59065 0.2055 0.4039 -0.22392 2020 8 5 59066 0.2064 0.4027 -0.22318 2020 8 6 59067 0.2074 0.4014 -0.22257 2020 8 7 59068 0.2082 0.4001 -0.22208 2020 8 8 59069 0.2091 0.3988 -0.22167 2020 8 9 59070 0.2100 0.3975 -0.22129 2020 8 10 59071 0.2108 0.3961 -0.22089 2020 8 11 59072 0.2116 0.3948 -0.22043 2020 8 12 59073 0.2123 0.3934 -0.21988 2020 8 13 59074 0.2131 0.3921 -0.21923 2020 8 14 59075 0.2138 0.3907 -0.21847 2020 8 15 59076 0.2145 0.3893 -0.21764 2020 8 16 59077 0.2151 0.3879 -0.21678 2020 8 17 59078 0.2157 0.3865 -0.21597 2020 8 18 59079 0.2163 0.3850 -0.21532 2020 8 19 59080 0.2169 0.3836 -0.21490 2020 8 20 59081 0.2175 0.3821 -0.21477 2020 8 21 59082 0.2180 0.3807 -0.21489 2020 8 22 59083 0.2185 0.3792 -0.21520 2020 8 23 59084 0.2189 0.3777 -0.21555 2020 8 24 59085 0.2194 0.3762 -0.21582 2020 8 25 59086 0.2198 0.3747 -0.21592 2020 8 26 59087 0.2201 0.3732 -0.21579 2020 8 27 59088 0.2205 0.3717 -0.21545 2020 8 28 59089 0.2208 0.3702 -0.21496 2020 8 29 59090 0.2211 0.3687 -0.21441 2020 8 30 59091 0.2213 0.3672 -0.21386 2020 8 31 59092 0.2216 0.3656 -0.21341 2020 9 1 59093 0.2217 0.3641 -0.21308 2020 9 2 59094 0.2219 0.3626 -0.21290 2020 9 3 59095 0.2221 0.3610 -0.21285 2020 9 4 59096 0.2222 0.3595 -0.21291 2020 9 5 59097 0.2222 0.3579 -0.21302 2020 9 6 59098 0.2223 0.3564 -0.21314 2020 9 7 59099 0.2223 0.3548 -0.21321 2020 9 8 59100 0.2223 0.3533 -0.21321 2020 9 9 59101 0.2222 0.3517 -0.21309 2020 9 10 59102 0.2222 0.3502 -0.21287 2020 9 11 59103 0.2221 0.3486 -0.21256 2020 9 12 59104 0.2219 0.3471 -0.21220 2020 9 13 59105 0.2218 0.3455 -0.21186 2020 9 14 59106 0.2216 0.3440 -0.21162 2020 9 15 59107 0.2213 0.3425 -0.21159 2020 9 16 59108 0.2211 0.3409 -0.21183 2020 9 17 59109 0.2208 0.3394 -0.21236 2020 9 18 59110 0.2205 0.3378 -0.21313 2020 9 19 59111 0.2201 0.3363 -0.21401 2020 9 20 59112 0.2198 0.3348 -0.21485 2020 9 21 59113 0.2194 0.3333 -0.21553 2020 9 22 59114 0.2189 0.3318 -0.21596 2020 9 23 59115 0.2185 0.3303 -0.21614 2020 9 24 59116 0.2180 0.3288 -0.21614 2020 9 25 59117 0.2175 0.3273 -0.21604 2020 9 26 59118 0.2169 0.3258 -0.21592 2020 9 27 59119 0.2163 0.3243 -0.21587 2020 9 28 59120 0.2157 0.3228 -0.21594 2020 9 29 59121 0.2151 0.3214 -0.21615 2020 9 30 59122 0.2144 0.3199 -0.21648 2020 10 1 59123 0.2138 0.3185 -0.21692 2020 10 2 59124 0.2130 0.3171 -0.21743 2020 10 3 59125 0.2123 0.3156 -0.21795 2020 10 4 59126 0.2115 0.3142 -0.21844 2020 10 5 59127 0.2107 0.3128 -0.21884 2020 10 6 59128 0.2099 0.3115 -0.21913 2020 10 7 59129 0.2090 0.3101 -0.21931 2020 10 8 59130 0.2082 0.3087 -0.21938 2020 10 9 59131 0.2073 0.3074 -0.21938 2020 10 10 59132 0.2063 0.3061 -0.21936 2020 10 11 59133 0.2054 0.3048 -0.21941 2020 10 12 59134 0.2044 0.3035 -0.21961 2020 10 13 59135 0.2034 0.3022 -0.22004 2020 10 14 59136 0.2024 0.3009 -0.22076 2020 10 15 59137 0.2013 0.2997 -0.22176 2020 10 16 59138 0.2002 0.2984 -0.22294 2020 10 17 59139 0.1991 0.2972 -0.22417 2020 10 18 59140 0.1980 0.2960 -0.22528 2020 10 19 59141 0.1968 0.2948 -0.22616 2020 10 20 59142 0.1957 0.2937 -0.22676 2020 10 21 59143 0.1945 0.2925 -0.22711 2020 10 22 59144 0.1933 0.2914 -0.22730 2020 10 23 59145 0.1920 0.2903 -0.22743 2020 10 24 59146 0.1908 0.2892 -0.22759 2020 10 25 59147 0.1895 0.2881 -0.22784 2020 10 26 59148 0.1882 0.2871 -0.22821 2020 10 27 59149 0.1868 0.2861 -0.22870 2020 10 28 59150 0.1855 0.2851 -0.22929 2020 10 29 59151 0.1841 0.2841 -0.22994 2020 10 30 59152 0.1828 0.2831 -0.23061 2020 10 31 59153 0.1814 0.2822 -0.23124 2020 11 1 59154 0.1799 0.2813 -0.23179 2020 11 2 59155 0.1785 0.2804 -0.23222 2020 11 3 59156 0.1771 0.2795 -0.23251 2020 11 4 59157 0.1756 0.2786 -0.23267 2020 11 5 59158 0.1741 0.2778 -0.23272 2020 11 6 59159 0.1726 0.2770 -0.23273 2020 11 7 59160 0.1711 0.2762 -0.23276 2020 11 8 59161 0.1696 0.2755 -0.23289 2020 11 9 59162 0.1680 0.2747 -0.23321 2020 11 10 59163 0.1664 0.2740 -0.23376 2020 11 11 59164 0.1649 0.2734 -0.23458 2020 11 12 59165 0.1633 0.2727 -0.23562 2020 11 13 59166 0.1617 0.2721 -0.23678 2020 11 14 59167 0.1601 0.2715 -0.23791 2020 11 15 59168 0.1584 0.2709 -0.23887 2020 11 16 59169 0.1568 0.2703 -0.23956 2020 11 17 59170 0.1552 0.2698 -0.23998 2020 11 18 59171 0.1535 0.2693 -0.24019 2020 11 19 59172 0.1518 0.2688 -0.24029 2020 11 20 59173 0.1502 0.2684 -0.24037 2020 11 21 59174 0.1485 0.2680 -0.24053 2020 11 22 59175 0.1468 0.2676 -0.24079 2020 11 23 59176 0.1451 0.2672 -0.24116 2020 11 24 59177 0.1434 0.2669 -0.24163 2020 11 25 59178 0.1417 0.2666 -0.24217 2020 11 26 59179 0.1400 0.2663 -0.24272 2020 11 27 59180 0.1382 0.2660 -0.24326 2020 11 28 59181 0.1365 0.2658 -0.24372 2020 11 29 59182 0.1348 0.2656 -0.24409 2020 11 30 59183 0.1330 0.2654 -0.24432 2020 12 1 59184 0.1313 0.2653 -0.24444 2020 12 2 59185 0.1295 0.2652 -0.24446 2020 12 3 59186 0.1278 0.2651 -0.24444 2020 12 4 59187 0.1260 0.2650 -0.24444 2020 12 5 59188 0.1243 0.2650 -0.24456 2020 12 6 59189 0.1225 0.2650 -0.24487 2020 12 7 59190 0.1208 0.2650 -0.24544 2020 12 8 59191 0.1190 0.2651 -0.24628 2020 12 9 59192 0.1173 0.2651 -0.24738 2020 12 10 59193 0.1155 0.2653 -0.24867 2020 12 11 59194 0.1138 0.2654 -0.25000 2020 12 12 59195 0.1120 0.2656 -0.25122 2020 12 13 59196 0.1103 0.2658 -0.25220 2020 12 14 59197 0.1085 0.2660 -0.25287 2020 12 15 59198 0.1068 0.2662 -0.25324 2020 12 16 59199 0.1051 0.2665 -0.25340 2020 12 17 59200 0.1034 0.2668 -0.25344 2020 12 18 59201 0.1016 0.2672 -0.25347 2020 12 19 59202 0.0999 0.2675 -0.25355 2020 12 20 59203 0.0982 0.2679 -0.25370 2020 12 21 59204 0.0965 0.2683 -0.25393 2020 12 22 59205 0.0948 0.2688 -0.25420 2020 12 23 59206 0.0931 0.2692 -0.25448 2020 12 24 59207 0.0915 0.2697 -0.25474 2020 12 25 59208 0.0898 0.2703 -0.25494 2020 12 26 59209 0.0881 0.2708 -0.25504 2020 12 27 59210 0.0865 0.2714 -0.25501 2020 12 28 59211 0.0848 0.2720 -0.25484 2020 12 29 59212 0.0832 0.2727 -0.25454 2020 12 30 59213 0.0816 0.2733 -0.25414 2020 12 31 59214 0.0800 0.2740 -0.25371 2021 1 1 59215 0.0784 0.2747 -0.25332 2021 1 2 59216 0.0768 0.2755 -0.25307 2021 1 3 59217 0.0753 0.2762 -0.25301 2021 1 4 59218 0.0737 0.2770 -0.25317 2021 1 5 59219 0.0722 0.2778 -0.25354 2021 1 6 59220 0.0707 0.2787 -0.25407 2021 1 7 59221 0.0692 0.2796 -0.25469 2021 1 8 59222 0.0677 0.2804 -0.25531 2021 1 9 59223 0.0662 0.2814 -0.25580 2021 1 10 59224 0.0648 0.2823 -0.25608 2021 1 11 59225 0.0634 0.2833 -0.25613 2021 1 12 59226 0.0619 0.2843 -0.25602 2021 1 13 59227 0.0605 0.2853 -0.25587 2021 1 14 59228 0.0592 0.2863 -0.25574 2021 1 15 59229 0.0578 0.2874 -0.25569 2021 1 16 59230 0.0565 0.2884 -0.25571 2021 1 17 59231 0.0551 0.2895 -0.25583 2021 1 18 59232 0.0538 0.2907 -0.25599 2021 1 19 59233 0.0526 0.2918 -0.25619 2021 1 20 59234 0.0513 0.2930 -0.25644 2021 1 21 59235 0.0501 0.2942 -0.25658 2021 1 22 59236 0.0489 0.2954 -0.25659 2021 1 23 59237 0.0477 0.2966 -0.25644 2021 1 24 59238 0.0465 0.2978 -0.25612 2021 1 25 59239 0.0454 0.2991 -0.25568 2021 1 26 59240 0.0443 0.3004 -0.25517 2021 1 27 59241 0.0432 0.3017 -0.25470 2021 1 28 59242 0.0421 0.3030 -0.25430 2021 1 29 59243 0.0410 0.3044 -0.25402 2021 1 30 59244 0.0400 0.3057 -0.25393 2021 1 31 59245 0.0390 0.3071 -0.25407 2021 2 1 59246 0.0381 0.3085 -0.25446 2021 2 2 59247 0.0371 0.3099 -0.25507 2021 2 3 59248 0.0362 0.3113 -0.25578 2021 2 4 59249 0.0353 0.3127 -0.25647 2021 2 5 59250 0.0344 0.3142 -0.25704 2021 2 6 59251 0.0336 0.3157 -0.25736 2021 2 7 59252 0.0328 0.3171 -0.25742 2021 2 8 59253 0.0320 0.3186 -0.25725 2021 2 9 59254 0.0313 0.3202 -0.25692 2021 2 10 59255 0.0305 0.3217 -0.25656 2021 2 11 59256 0.0298 0.3232 -0.25627 2021 2 12 59257 0.0292 0.3248 -0.25612 2021 2 13 59258 0.0285 0.3263 -0.25607 2021 2 14 59259 0.0279 0.3279 -0.25612 2021 2 15 59260 0.0273 0.3295 -0.25625 2021 2 16 59261 0.0268 0.3311 -0.25641 2021 2 17 59262 0.0263 0.3327 -0.25654 2021 2 18 59263 0.0258 0.3343 -0.25657 2021 2 19 59264 0.0253 0.3359 -0.25649 2021 2 20 59265 0.0249 0.3375 -0.25627 2021 2 21 59266 0.0245 0.3391 -0.25591 2021 2 22 59267 0.0241 0.3408 -0.25551 2021 2 23 59268 0.0238 0.3424 -0.25517 2021 2 24 59269 0.0235 0.3441 -0.25489 2021 2 25 59270 0.0232 0.3457 -0.25476 2021 2 26 59271 0.0229 0.3474 -0.25487 2021 2 27 59272 0.0227 0.3491 -0.25521 2021 2 28 59273 0.0225 0.3507 -0.25575 2021 3 1 59274 0.0224 0.3524 -0.25645 2021 3 2 59275 0.0223 0.3541 -0.25724 2021 3 3 59276 0.0222 0.3558 -0.25801 2021 3 4 59277 0.0221 0.3575 -0.25862 2021 3 5 59278 0.0221 0.3592 -0.25902 2021 3 6 59279 0.0221 0.3609 -0.25921 2021 3 7 59280 0.0221 0.3625 -0.25925 2021 3 8 59281 0.0222 0.3642 -0.25922 2021 3 9 59282 0.0223 0.3659 -0.25919 2021 3 10 59283 0.0224 0.3676 -0.25931 2021 3 11 59284 0.0226 0.3693 -0.25965 2021 3 12 59285 0.0228 0.3710 -0.26017 2021 3 13 59286 0.0230 0.3727 -0.26080 2021 3 14 59287 0.0233 0.3744 -0.26153 2021 3 15 59288 0.0236 0.3760 -0.26240 2021 3 16 59289 0.0239 0.3777 -0.26327 2021 3 17 59290 0.0242 0.3794 -0.26410 2021 3 18 59291 0.0246 0.3810 -0.26491 2021 3 19 59292 0.0250 0.3827 -0.26557 2021 3 20 59293 0.0255 0.3844 -0.26611 2021 3 21 59294 0.0260 0.3860 -0.26657 2021 3 22 59295 0.0265 0.3876 -0.26694 2021 3 23 59296 0.0270 0.3893 -0.26725 2021 3 24 59297 0.0276 0.3909 -0.26764 2021 3 25 59298 0.0282 0.3925 -0.26815 2021 3 26 59299 0.0288 0.3941 -0.26885 2021 3 27 59300 0.0295 0.3957 -0.26985 2021 3 28 59301 0.0301 0.3973 -0.27115 2021 3 29 59302 0.0309 0.3989 -0.27265 2021 3 30 59303 0.0316 0.4005 -0.27417 2021 3 31 59304 0.0324 0.4020 -0.27559 2021 4 1 59305 0.0332 0.4036 -0.27682 2021 4 2 59306 0.0340 0.4051 -0.27779 2021 4 3 59307 0.0349 0.4066 -0.27846 2021 4 4 59308 0.0358 0.4081 -0.27895 2021 4 5 59309 0.0367 0.4096 -0.27934 2021 4 6 59310 0.0377 0.4111 -0.27974 2021 4 7 59311 0.0386 0.4126 -0.28025 2021 4 8 59312 0.0397 0.4140 -0.28096 2021 4 9 59313 0.0407 0.4155 -0.28182 2021 4 10 59314 0.0417 0.4169 -0.28287 2021 4 11 59315 0.0428 0.4183 -0.28396 2021 4 12 59316 0.0439 0.4197 -0.28499 2021 4 13 59317 0.0451 0.4211 -0.28591 2021 4 14 59318 0.0463 0.4224 -0.28679 2021 4 15 59319 0.0474 0.4238 -0.28752 2021 4 16 59320 0.0487 0.4251 -0.28812 2021 4 17 59321 0.0499 0.4264 -0.28863 2021 4 18 59322 0.0512 0.4277 -0.28907 2021 4 19 59323 0.0524 0.4289 -0.28947 2021 4 20 59324 0.0538 0.4302 -0.28987 2021 4 21 59325 0.0551 0.4314 -0.29035 2021 4 22 59326 0.0565 0.4326 -0.29098 2021 4 23 59327 0.0578 0.4338 -0.29185 2021 4 24 59328 0.0592 0.4349 -0.29299 2021 4 25 59329 0.0607 0.4361 -0.29435 2021 4 26 59330 0.0621 0.4372 -0.29582 2021 4 27 59331 0.0636 0.4383 -0.29724 2021 4 28 59332 0.0651 0.4393 -0.29849 2021 4 29 59333 0.0666 0.4404 -0.29945 2021 4 30 59334 0.0681 0.4414 -0.30005 2021 5 1 59335 0.0696 0.4424 -0.30041 2021 5 2 59336 0.0712 0.4434 -0.30068 2021 5 3 59337 0.0728 0.4443 -0.30095 2021 5 4 59338 0.0744 0.4452 -0.30123 2021 5 5 59339 0.0760 0.4461 -0.30169 2021 5 6 59340 0.0776 0.4470 -0.30234 2021 5 7 59341 0.0793 0.4479 -0.30305 2021 5 8 59342 0.0810 0.4487 -0.30379 2021 5 9 59343 0.0827 0.4495 -0.30448 2021 5 10 59344 0.0844 0.4503 -0.30509 2021 5 11 59345 0.0861 0.4510 -0.30551 2021 5 12 59346 0.0878 0.4517 -0.30579 2021 5 13 59347 0.0895 0.4524 -0.30596 2021 5 14 59348 0.0913 0.4531 -0.30600 2021 5 15 59349 0.0931 0.4537 -0.30594 2021 5 16 59350 0.0948 0.4543 -0.30582 2021 5 17 59351 0.0966 0.4549 -0.30567 2021 5 18 59352 0.0984 0.4555 -0.30556 2021 5 19 59353 0.1002 0.4560 -0.30560 2021 5 20 59354 0.1021 0.4565 -0.30589 2021 5 21 59355 0.1039 0.4569 -0.30638 2021 5 22 59356 0.1057 0.4574 -0.30707 2021 5 23 59357 0.1076 0.4578 -0.30796 2021 5 24 59358 0.1094 0.4582 -0.30897 2021 5 25 59359 0.1113 0.4585 -0.30991 2021 5 26 59360 0.1132 0.4588 -0.31062 2021 5 27 59361 0.1150 0.4591 -0.31104 2021 5 28 59362 0.1169 0.4594 -0.31120 2021 5 29 59363 0.1188 0.4596 -0.31118 2021 5 30 59364 0.1207 0.4598 -0.31116 2021 5 31 59365 0.1226 0.4600 -0.31123 2021 6 1 59366 0.1245 0.4601 -0.31146 2021 6 2 59367 0.1264 0.4603 -0.31188 2021 6 3 59368 0.1283 0.4603 -0.31238 2021 6 4 59369 0.1302 0.4604 -0.31298 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) 58982 -105.45 0.28 -10.87 0.12 58983 -105.69 0.28 -10.80 0.12 58984 -105.73 0.28 -10.62 0.12 58985 -105.52 0.53 -10.48 0.15 58986 -105.33 0.35 -10.38 0.14 58987 -105.43 0.35 -10.24 0.14 58988 -105.79 0.23 -10.06 0.13 IERS Celestial Pole Offset Final Series MJD dpsi deps (msec. of arc) 58941 -106.3 -9.8 58942 -106.3 -9.8 58943 -106.3 -10.1 58944 -106.0 -10.3 58945 -105.5 -10.3 58946 -105.2 -9.9 58947 -105.5 -9.7 58948 -106.2 -9.8 58949 -106.7 -9.9 58950 -106.7 -9.9 58951 -106.4 -9.9 58952 -106.1 -10.1 58953 -106.0 -10.3 58954 -106.2 -10.3 58955 -106.1 -10.3 58956 -105.7 -10.3 58957 -105.3 -10.1 58958 -105.1 -9.9 58959 -105.2 -9.6 58960 -105.5 -9.3 58961 -105.7 -9.3 58962 -105.6 -9.6 58963 -105.6 -9.9 58964 -105.5 -10.2 58965 -105.6 -10.3 58966 -105.8 -10.4 58967 -106.0 -10.6 58968 -105.9 -10.6 58969 -105.4 -10.6 58970 -105.0 -10.6 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 58982 0.092 0.111 -0.081 0.123 58983 0.100 0.111 -0.082 0.123 58984 0.109 0.111 -0.088 0.123 58985 0.114 0.211 -0.096 0.146 58986 0.114 0.139 -0.106 0.138 58987 0.112 0.139 -0.116 0.138 58988 0.108 0.092 -0.127 0.132 IAU2000A Celestial Pole Offset Final Series MJD dX dY (msec. of arc) 58941 -0.03 -0.04 58942 -0.05 -0.08 58943 -0.04 -0.06 58944 -0.03 -0.01 58945 -0.02 0.03 58946 -0.01 0.08 58947 -0.03 0.06 58948 -0.06 0.02 58949 -0.07 0.03 58950 -0.08 0.06 58951 -0.08 0.09 58952 -0.08 0.11 58953 -0.09 0.14 58954 -0.09 0.17 58955 -0.01 0.08 58956 0.10 -0.04 58957 0.10 -0.02 58958 0.06 0.04 58959 0.02 0.11 58960 -0.03 0.17 58961 0.01 0.09 58962 0.07 -0.04 58963 0.06 -0.06 58964 0.03 -0.04 58965 -0.01 -0.03 58966 -0.04 -0.01 58967 -0.08 0.01 58968 -0.01 0.01 58969 0.08 0.00 58970 0.10 0.01 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).