********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 11 June 2020 Vol. XXXIII No. 024 ______________________________________________________________________ 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 20 6 5 59005 0.11962 .00009 0.44044 .00009 -0.256146 0.000030 20 6 6 59006 0.12135 .00009 0.44082 .00009 -0.256038 0.000026 20 6 7 59007 0.12295 .00009 0.44133 .00009 -0.255688 0.000024 20 6 8 59008 0.12422 .00009 0.44165 .00009 -0.255174 0.000012 20 6 9 59009 0.12542 .00009 0.44156 .00009 -0.254586 0.000012 20 6 10 59010 0.12691 .00009 0.44119 .00009 -0.253958 0.000010 20 6 11 59011 0.12869 .00009 0.44081 .00009 -0.253353 0.000010 _______________________________________________________________________ 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 = 0.1119 + 0.0017 cos A + 0.1002 sin A + 0.0182 cos C - 0.0029 sin C y = 0.3508 + 0.0925 cos A - 0.0031 sin A - 0.0029 cos C - 0.0182 sin C UT1-UTC = -0.2251 - 0.00014 (MJD - 59019) - (UT2-UT1) where A = 2*pi*(MJD-59011)/365.25 and C = 2*pi*(MJD-59011)/435. TAI-UTC(MJD 59012) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59011)**0.80 S t = 0.00025 (MJD-59011)**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 12 59012 0.1306 0.4405 -0.25281 2020 6 13 59013 0.1326 0.4403 -0.25233 2020 6 14 59014 0.1347 0.4403 -0.25192 2020 6 15 59015 0.1367 0.4404 -0.25156 2020 6 16 59016 0.1386 0.4404 -0.25118 2020 6 17 59017 0.1403 0.4405 -0.25072 2020 6 18 59018 0.1421 0.4404 -0.25015 2020 6 19 59019 0.1438 0.4403 -0.24946 2020 6 20 59020 0.1456 0.4401 -0.24862 2020 6 21 59021 0.1474 0.4400 -0.24767 2020 6 22 59022 0.1493 0.4398 -0.24663 2020 6 23 59023 0.1511 0.4396 -0.24559 2020 6 24 59024 0.1528 0.4394 -0.24463 2020 6 25 59025 0.1545 0.4391 -0.24387 2020 6 26 59026 0.1561 0.4387 -0.24335 2020 6 27 59027 0.1577 0.4383 -0.24306 2020 6 28 59028 0.1593 0.4378 -0.24296 2020 6 29 59029 0.1610 0.4374 -0.24296 2020 6 30 59030 0.1627 0.4369 -0.24296 2020 7 1 59031 0.1643 0.4365 -0.24286 2020 7 2 59032 0.1659 0.4360 -0.24257 2020 7 3 59033 0.1674 0.4355 -0.24207 2020 7 4 59034 0.1689 0.4349 -0.24138 2020 7 5 59035 0.1704 0.4343 -0.24058 2020 7 6 59036 0.1718 0.4336 -0.23973 2020 7 7 59037 0.1733 0.4329 -0.23892 2020 7 8 59038 0.1748 0.4322 -0.23819 2020 7 9 59039 0.1763 0.4314 -0.23758 2020 7 10 59040 0.1777 0.4307 -0.23708 2020 7 11 59041 0.1792 0.4299 -0.23666 2020 7 12 59042 0.1806 0.4291 -0.23628 2020 7 13 59043 0.1819 0.4282 -0.23589 2020 7 14 59044 0.1833 0.4274 -0.23546 2020 7 15 59045 0.1847 0.4265 -0.23494 2020 7 16 59046 0.1861 0.4256 -0.23430 2020 7 17 59047 0.1874 0.4246 -0.23351 2020 7 18 59048 0.1887 0.4237 -0.23260 2020 7 19 59049 0.1900 0.4227 -0.23157 2020 7 20 59050 0.1913 0.4217 -0.23052 2020 7 21 59051 0.1926 0.4207 -0.22951 2020 7 22 59052 0.1938 0.4197 -0.22865 2020 7 23 59053 0.1951 0.4186 -0.22802 2020 7 24 59054 0.1963 0.4175 -0.22762 2020 7 25 59055 0.1975 0.4164 -0.22742 2020 7 26 59056 0.1987 0.4153 -0.22734 2020 7 27 59057 0.1998 0.4142 -0.22726 2020 7 28 59058 0.2010 0.4130 -0.22706 2020 7 29 59059 0.2021 0.4119 -0.22668 2020 7 30 59060 0.2032 0.4107 -0.22608 2020 7 31 59061 0.2042 0.4095 -0.22526 2020 8 1 59062 0.2053 0.4082 -0.22430 2020 8 2 59063 0.2063 0.4070 -0.22328 2020 8 3 59064 0.2073 0.4057 -0.22227 2020 8 4 59065 0.2083 0.4045 -0.22134 2020 8 5 59066 0.2092 0.4032 -0.22054 2020 8 6 59067 0.2101 0.4019 -0.21988 2020 8 7 59068 0.2110 0.4006 -0.21933 2020 8 8 59069 0.2119 0.3992 -0.21886 2020 8 9 59070 0.2127 0.3979 -0.21844 2020 8 10 59071 0.2135 0.3965 -0.21801 2020 8 11 59072 0.2143 0.3951 -0.21754 2020 8 12 59073 0.2151 0.3937 -0.21698 2020 8 13 59074 0.2158 0.3923 -0.21633 2020 8 14 59075 0.2165 0.3909 -0.21558 2020 8 15 59076 0.2172 0.3895 -0.21476 2020 8 16 59077 0.2178 0.3881 -0.21391 2020 8 17 59078 0.2184 0.3866 -0.21311 2020 8 18 59079 0.2190 0.3851 -0.21246 2020 8 19 59080 0.2196 0.3837 -0.21203 2020 8 20 59081 0.2201 0.3822 -0.21188 2020 8 21 59082 0.2206 0.3807 -0.21197 2020 8 22 59083 0.2211 0.3792 -0.21222 2020 8 23 59084 0.2215 0.3777 -0.21250 2020 8 24 59085 0.2220 0.3762 -0.21270 2020 8 25 59086 0.2224 0.3746 -0.21271 2020 8 26 59087 0.2227 0.3731 -0.21250 2020 8 27 59088 0.2230 0.3716 -0.21208 2020 8 28 59089 0.2233 0.3700 -0.21153 2020 8 29 59090 0.2236 0.3685 -0.21091 2020 8 30 59091 0.2239 0.3669 -0.21033 2020 8 31 59092 0.2241 0.3654 -0.20985 2020 9 1 59093 0.2242 0.3638 -0.20950 2020 9 2 59094 0.2244 0.3622 -0.20931 2020 9 3 59095 0.2245 0.3606 -0.20926 2020 9 4 59096 0.2246 0.3591 -0.20932 2020 9 5 59097 0.2247 0.3575 -0.20944 2020 9 6 59098 0.2247 0.3559 -0.20956 2020 9 7 59099 0.2247 0.3543 -0.20963 2020 9 8 59100 0.2247 0.3527 -0.20963 2020 9 9 59101 0.2246 0.3512 -0.20951 2020 9 10 59102 0.2245 0.3496 -0.20929 2020 9 11 59103 0.2244 0.3480 -0.20899 2020 9 12 59104 0.2242 0.3464 -0.20865 2020 9 13 59105 0.2240 0.3449 -0.20834 2020 9 14 59106 0.2238 0.3433 -0.20813 2020 9 15 59107 0.2236 0.3417 -0.20814 2020 9 16 59108 0.2233 0.3401 -0.20842 2020 9 17 59109 0.2230 0.3386 -0.20900 2020 9 18 59110 0.2227 0.3370 -0.20981 2020 9 19 59111 0.2223 0.3355 -0.21073 2020 9 20 59112 0.2219 0.3339 -0.21161 2020 9 21 59113 0.2215 0.3324 -0.21231 2020 9 22 59114 0.2210 0.3308 -0.21276 2020 9 23 59115 0.2205 0.3293 -0.21296 2020 9 24 59116 0.2200 0.3278 -0.21297 2020 9 25 59117 0.2195 0.3262 -0.21287 2020 9 26 59118 0.2189 0.3247 -0.21277 2020 9 27 59119 0.2183 0.3232 -0.21272 2020 9 28 59120 0.2177 0.3217 -0.21279 2020 9 29 59121 0.2170 0.3202 -0.21300 2020 9 30 59122 0.2163 0.3188 -0.21335 2020 10 1 59123 0.2156 0.3173 -0.21379 2020 10 2 59124 0.2149 0.3159 -0.21431 2020 10 3 59125 0.2141 0.3144 -0.21484 2020 10 4 59126 0.2133 0.3130 -0.21533 2020 10 5 59127 0.2125 0.3116 -0.21574 2020 10 6 59128 0.2116 0.3102 -0.21605 2020 10 7 59129 0.2108 0.3088 -0.21623 2020 10 8 59130 0.2099 0.3074 -0.21631 2020 10 9 59131 0.2089 0.3060 -0.21632 2020 10 10 59132 0.2080 0.3047 -0.21632 2020 10 11 59133 0.2070 0.3034 -0.21638 2020 10 12 59134 0.2060 0.3020 -0.21659 2020 10 13 59135 0.2049 0.3007 -0.21704 2020 10 14 59136 0.2039 0.2994 -0.21778 2020 10 15 59137 0.2028 0.2982 -0.21880 2020 10 16 59138 0.2017 0.2969 -0.22000 2020 10 17 59139 0.2005 0.2957 -0.22126 2020 10 18 59140 0.1994 0.2945 -0.22240 2020 10 19 59141 0.1982 0.2933 -0.22330 2020 10 20 59142 0.1970 0.2921 -0.22393 2020 10 21 59143 0.1958 0.2909 -0.22431 2020 10 22 59144 0.1945 0.2898 -0.22453 2020 10 23 59145 0.1933 0.2886 -0.22470 2020 10 24 59146 0.1920 0.2875 -0.22489 2020 10 25 59147 0.1907 0.2864 -0.22517 2020 10 26 59148 0.1893 0.2854 -0.22557 2020 10 27 59149 0.1880 0.2843 -0.22609 2020 10 28 59150 0.1866 0.2833 -0.22671 2020 10 29 59151 0.1852 0.2823 -0.22739 2020 10 30 59152 0.1838 0.2813 -0.22808 2020 10 31 59153 0.1824 0.2804 -0.22873 2020 11 1 59154 0.1809 0.2795 -0.22930 2020 11 2 59155 0.1794 0.2785 -0.22975 2020 11 3 59156 0.1780 0.2777 -0.23006 2020 11 4 59157 0.1765 0.2768 -0.23025 2020 11 5 59158 0.1749 0.2759 -0.23032 2020 11 6 59159 0.1734 0.2751 -0.23036 2020 11 7 59160 0.1719 0.2743 -0.23041 2020 11 8 59161 0.1703 0.2736 -0.23056 2020 11 9 59162 0.1687 0.2728 -0.23089 2020 11 10 59163 0.1671 0.2721 -0.23146 2020 11 11 59164 0.1655 0.2714 -0.23230 2020 11 12 59165 0.1639 0.2708 -0.23336 2020 11 13 59166 0.1623 0.2701 -0.23454 2020 11 14 59167 0.1606 0.2695 -0.23569 2020 11 15 59168 0.1590 0.2689 -0.23666 2020 11 16 59169 0.1573 0.2683 -0.23737 2020 11 17 59170 0.1556 0.2678 -0.23781 2020 11 18 59171 0.1539 0.2673 -0.23803 2020 11 19 59172 0.1522 0.2668 -0.23813 2020 11 20 59173 0.1505 0.2664 -0.23822 2020 11 21 59174 0.1488 0.2659 -0.23838 2020 11 22 59175 0.1471 0.2655 -0.23865 2020 11 23 59176 0.1453 0.2652 -0.23903 2020 11 24 59177 0.1436 0.2648 -0.23950 2020 11 25 59178 0.1419 0.2645 -0.24003 2020 11 26 59179 0.1401 0.2642 -0.24058 2020 11 27 59180 0.1383 0.2640 -0.24110 2020 11 28 59181 0.1366 0.2637 -0.24154 2020 11 29 59182 0.1348 0.2635 -0.24187 2020 11 30 59183 0.1330 0.2633 -0.24206 2020 12 1 59184 0.1313 0.2632 -0.24211 2020 12 2 59185 0.1295 0.2631 -0.24205 2020 12 3 59186 0.1277 0.2630 -0.24192 2020 12 4 59187 0.1259 0.2629 -0.24179 2020 12 5 59188 0.1241 0.2629 -0.24173 2020 12 6 59189 0.1224 0.2629 -0.24184 2020 12 7 59190 0.1206 0.2629 -0.24215 2020 12 8 59191 0.1188 0.2630 -0.24272 2020 12 9 59192 0.1170 0.2630 -0.24352 2020 12 10 59193 0.1152 0.2632 -0.24449 2020 12 11 59194 0.1134 0.2633 -0.24552 2020 12 12 59195 0.1117 0.2635 -0.24649 2020 12 13 59196 0.1099 0.2637 -0.24729 2020 12 14 59197 0.1081 0.2639 -0.24789 2020 12 15 59198 0.1063 0.2641 -0.24830 2020 12 16 59199 0.1046 0.2644 -0.24862 2020 12 17 59200 0.1028 0.2647 -0.24893 2020 12 18 59201 0.1011 0.2651 -0.24932 2020 12 19 59202 0.0993 0.2654 -0.24981 2020 12 20 59203 0.0976 0.2658 -0.25040 2020 12 21 59204 0.0959 0.2663 -0.25107 2020 12 22 59205 0.0941 0.2667 -0.25175 2020 12 23 59206 0.0924 0.2672 -0.25240 2020 12 24 59207 0.0907 0.2677 -0.25296 2020 12 25 59208 0.0890 0.2682 -0.25341 2020 12 26 59209 0.0873 0.2688 -0.25369 2020 12 27 59210 0.0857 0.2694 -0.25380 2020 12 28 59211 0.0840 0.2700 -0.25373 2020 12 29 59212 0.0823 0.2706 -0.25349 2020 12 30 59213 0.0807 0.2713 -0.25314 2020 12 31 59214 0.0791 0.2720 -0.25274 2021 1 1 59215 0.0774 0.2727 -0.25238 2021 1 2 59216 0.0758 0.2735 -0.25215 2021 1 3 59217 0.0743 0.2743 -0.25213 2021 1 4 59218 0.0727 0.2751 -0.25234 2021 1 5 59219 0.0711 0.2759 -0.25278 2021 1 6 59220 0.0696 0.2768 -0.25337 2021 1 7 59221 0.0681 0.2776 -0.25402 2021 1 8 59222 0.0665 0.2785 -0.25460 2021 1 9 59223 0.0650 0.2795 -0.25501 2021 1 10 59224 0.0636 0.2804 -0.25518 2021 1 11 59225 0.0621 0.2814 -0.25511 2021 1 12 59226 0.0607 0.2824 -0.25485 2021 1 13 59227 0.0592 0.2834 -0.25453 2021 1 14 59228 0.0578 0.2845 -0.25425 2021 1 15 59229 0.0565 0.2856 -0.25407 2021 1 16 59230 0.0551 0.2867 -0.25405 2021 1 17 59231 0.0538 0.2878 -0.25414 2021 1 18 59232 0.0524 0.2889 -0.25430 2021 1 19 59233 0.0511 0.2901 -0.25451 2021 1 20 59234 0.0499 0.2913 -0.25474 2021 1 21 59235 0.0486 0.2925 -0.25499 2021 1 22 59236 0.0474 0.2937 -0.25525 2021 1 23 59237 0.0461 0.2949 -0.25538 2021 1 24 59238 0.0450 0.2962 -0.25539 2021 1 25 59239 0.0438 0.2975 -0.25525 2021 1 26 59240 0.0427 0.2988 -0.25504 2021 1 27 59241 0.0415 0.3001 -0.25482 2021 1 28 59242 0.0404 0.3015 -0.25463 2021 1 29 59243 0.0394 0.3028 -0.25455 2021 1 30 59244 0.0383 0.3042 -0.25460 2021 1 31 59245 0.0373 0.3056 -0.25486 2021 2 1 59246 0.0363 0.3070 -0.25530 2021 2 2 59247 0.0354 0.3084 -0.25590 2021 2 3 59248 0.0344 0.3099 -0.25660 2021 2 4 59249 0.0335 0.3113 -0.25720 2021 2 5 59250 0.0326 0.3128 -0.25760 2021 2 6 59251 0.0318 0.3143 -0.25776 2021 2 7 59252 0.0310 0.3158 -0.25766 2021 2 8 59253 0.0302 0.3173 -0.25741 2021 2 9 59254 0.0294 0.3189 -0.25708 2021 2 10 59255 0.0286 0.3204 -0.25684 2021 2 11 59256 0.0279 0.3220 -0.25673 2021 2 12 59257 0.0273 0.3235 -0.25675 2021 2 13 59258 0.0266 0.3251 -0.25691 2021 2 14 59259 0.0260 0.3267 -0.25718 2021 2 15 59260 0.0254 0.3283 -0.25756 2021 2 16 59261 0.0248 0.3300 -0.25801 2021 2 17 59262 0.0243 0.3316 -0.25848 2021 2 18 59263 0.0238 0.3332 -0.25889 2021 2 19 59264 0.0233 0.3349 -0.25921 2021 2 20 59265 0.0229 0.3365 -0.25937 2021 2 21 59266 0.0224 0.3382 -0.25936 2021 2 22 59267 0.0221 0.3398 -0.25918 2021 2 23 59268 0.0217 0.3415 -0.25887 2021 2 24 59269 0.0214 0.3432 -0.25854 2021 2 25 59270 0.0211 0.3449 -0.25829 2021 2 26 59271 0.0209 0.3466 -0.25824 2021 2 27 59272 0.0206 0.3483 -0.25839 2021 2 28 59273 0.0204 0.3500 -0.25877 2021 3 1 59274 0.0203 0.3517 -0.25937 2021 3 2 59275 0.0201 0.3534 -0.26009 2021 3 3 59276 0.0200 0.3551 -0.26078 2021 3 4 59277 0.0200 0.3568 -0.26129 2021 3 5 59278 0.0200 0.3586 -0.26159 2021 3 6 59279 0.0199 0.3603 -0.26164 2021 3 7 59280 0.0200 0.3620 -0.26147 2021 3 8 59281 0.0200 0.3637 -0.26126 2021 3 9 59282 0.0201 0.3655 -0.26114 2021 3 10 59283 0.0203 0.3672 -0.26114 2021 3 11 59284 0.0204 0.3689 -0.26131 2021 3 12 59285 0.0206 0.3706 -0.26167 2021 3 13 59286 0.0208 0.3723 -0.26215 2021 3 14 59287 0.0211 0.3740 -0.26266 2021 3 15 59288 0.0214 0.3758 -0.26316 2021 3 16 59289 0.0217 0.3775 -0.26362 2021 3 17 59290 0.0221 0.3792 -0.26403 2021 3 18 59291 0.0224 0.3809 -0.26431 2021 3 19 59292 0.0229 0.3826 -0.26446 2021 3 20 59293 0.0233 0.3842 -0.26451 2021 3 21 59294 0.0238 0.3859 -0.26447 2021 3 22 59295 0.0243 0.3876 -0.26441 2021 3 23 59296 0.0248 0.3893 -0.26435 2021 3 24 59297 0.0254 0.3909 -0.26442 2021 3 25 59298 0.0260 0.3926 -0.26474 2021 3 26 59299 0.0266 0.3942 -0.26532 2021 3 27 59300 0.0273 0.3959 -0.26614 2021 3 28 59301 0.0280 0.3975 -0.26724 2021 3 29 59302 0.0287 0.3991 -0.26860 2021 3 30 59303 0.0295 0.4007 -0.27000 2021 3 31 59304 0.0302 0.4023 -0.27134 2021 4 1 59305 0.0311 0.4039 -0.27252 2021 4 2 59306 0.0319 0.4055 -0.27341 2021 4 3 59307 0.0328 0.4070 -0.27409 2021 4 4 59308 0.0337 0.4086 -0.27464 2021 4 5 59309 0.0346 0.4101 -0.27512 2021 4 6 59310 0.0356 0.4116 -0.27558 2021 4 7 59311 0.0365 0.4131 -0.27618 2021 4 8 59312 0.0376 0.4146 -0.27687 2021 4 9 59313 0.0386 0.4161 -0.27764 2021 4 10 59314 0.0397 0.4175 -0.27854 2021 4 11 59315 0.0408 0.4190 -0.27952 2021 4 12 59316 0.0419 0.4204 -0.28052 2021 4 13 59317 0.0430 0.4218 -0.28144 2021 4 14 59318 0.0442 0.4232 -0.28226 2021 4 15 59319 0.0454 0.4245 -0.28298 2021 4 16 59320 0.0466 0.4259 -0.28356 2021 4 17 59321 0.0479 0.4272 -0.28394 2021 4 18 59322 0.0492 0.4285 -0.28418 2021 4 19 59323 0.0505 0.4298 -0.28434 2021 4 20 59324 0.0518 0.4311 -0.28449 2021 4 21 59325 0.0532 0.4324 -0.28475 2021 4 22 59326 0.0545 0.4336 -0.28524 2021 4 23 59327 0.0559 0.4348 -0.28601 2021 4 24 59328 0.0573 0.4360 -0.28714 2021 4 25 59329 0.0588 0.4372 -0.28848 2021 4 26 59330 0.0602 0.4383 -0.28987 2021 4 27 59331 0.0617 0.4395 -0.29119 2021 4 28 59332 0.0632 0.4406 -0.29238 2021 4 29 59333 0.0648 0.4416 -0.29329 2021 4 30 59334 0.0663 0.4427 -0.29393 2021 5 1 59335 0.0679 0.4437 -0.29442 2021 5 2 59336 0.0694 0.4447 -0.29482 2021 5 3 59337 0.0710 0.4457 -0.29523 2021 5 4 59338 0.0727 0.4467 -0.29570 2021 5 5 59339 0.0743 0.4476 -0.29626 2021 5 6 59340 0.0760 0.4485 -0.29692 2021 5 7 59341 0.0776 0.4494 -0.29765 2021 5 8 59342 0.0793 0.4502 -0.29842 2021 5 9 59343 0.0810 0.4511 -0.29919 2021 5 10 59344 0.0827 0.4519 -0.29989 2021 5 11 59345 0.0845 0.4526 -0.30047 2021 5 12 59346 0.0862 0.4534 -0.30092 2021 5 13 59347 0.0880 0.4541 -0.30121 2021 5 14 59348 0.0898 0.4548 -0.30125 2021 5 15 59349 0.0916 0.4555 -0.30115 2021 5 16 59350 0.0934 0.4561 -0.30099 2021 5 17 59351 0.0952 0.4567 -0.30081 2021 5 18 59352 0.0970 0.4573 -0.30064 2021 5 19 59353 0.0988 0.4579 -0.30065 2021 5 20 59354 0.1007 0.4584 -0.30095 2021 5 21 59355 0.1025 0.4589 -0.30145 2021 5 22 59356 0.1044 0.4593 -0.30215 2021 5 23 59357 0.1063 0.4598 -0.30299 2021 5 24 59358 0.1081 0.4602 -0.30383 2021 5 25 59359 0.1100 0.4606 -0.30449 2021 5 26 59360 0.1119 0.4609 -0.30492 2021 5 27 59361 0.1138 0.4612 -0.30510 2021 5 28 59362 0.1157 0.4615 -0.30506 2021 5 29 59363 0.1177 0.4618 -0.30490 2021 5 30 59364 0.1196 0.4620 -0.30471 2021 5 31 59365 0.1215 0.4622 -0.30457 2021 6 1 59366 0.1234 0.4624 -0.30451 2021 6 2 59367 0.1253 0.4625 -0.30458 2021 6 3 59368 0.1273 0.4626 -0.30480 2021 6 4 59369 0.1292 0.4627 -0.30503 2021 6 5 59370 0.1311 0.4627 -0.30523 2021 6 6 59371 0.1331 0.4627 -0.30540 2021 6 7 59372 0.1350 0.4627 -0.30555 2021 6 8 59373 0.1370 0.4627 -0.30561 2021 6 9 59374 0.1389 0.4626 -0.30550 2021 6 10 59375 0.1408 0.4625 -0.30524 2021 6 11 59376 0.1428 0.4623 -0.30484 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) 58989 -106.37 0.22 -9.88 0.07 58990 -106.59 0.22 -9.94 0.07 58991 -106.64 0.22 -10.16 0.07 58992 -106.58 0.31 -10.42 0.05 58993 -106.51 0.31 -10.58 0.05 58994 -106.52 0.17 -10.61 0.13 58995 -106.69 0.13 -10.59 0.14 58996 -106.92 0.13 -10.58 0.14 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 58989 0.030 0.087 -0.061 0.074 58990 0.031 0.087 -0.053 0.074 58991 0.034 0.087 -0.044 0.074 58992 0.034 0.124 -0.033 0.053 58993 0.030 0.124 -0.020 0.053 58994 0.024 0.067 -0.007 0.128 58995 0.016 0.053 0.008 0.136 58996 0.007 0.053 0.023 0.136 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).