********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 28 May 2020 Vol. XXXIII No. 022 ______________________________________________________________________ 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. 021, 21 May 2020, we have fully * * incorporated the new NASA Goddard VLBI solutions -- gsf2020a.eoxy * * gsf2020a.eopi. The effect appears to be less than 0.1 mas in polar * * motion and 10 us in UT1-UTC. In addition small updates to system- * * atic corrections for celestial pole offsets were made for the NASA * * Goddard and IVS combined 24 hour VLBI series. * * * * 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 22 58991 0.10816 .00009 0.44678 .00009 -0.253974 0.000017 20 5 23 58992 0.10842 .00009 0.44696 .00009 -0.254147 0.000016 20 5 24 58993 0.10843 .00009 0.44662 .00009 -0.254152 0.000016 20 5 25 58994 0.10836 .00009 0.44602 .00009 -0.254012 0.000012 20 5 26 58995 0.10848 .00009 0.44530 .00009 -0.253830 0.000011 20 5 27 58996 0.10918 .00009 0.44450 .00009 -0.253670 0.000006 20 5 28 58997 0.11018 .00009 0.44394 .00009 -0.253557 0.000006 _______________________________________________________________________ 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 = 0.1133 - 0.0243 cos A + 0.1042 sin A + 0.0244 cos C - 0.0029 sin C y = 0.3488 + 0.0964 cos A + 0.0226 sin A - 0.0029 cos C - 0.0244 sin C UT1-UTC = -0.2256 - 0.00014 (MJD - 59005) - (UT2-UT1) where A = 2*pi*(MJD-58997)/365.25 and C = 2*pi*(MJD-58997)/435. TAI-UTC(MJD 58998) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58997)**0.80 S t = 0.00025 (MJD-58997)**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 5 29 58998 0.1115 0.4436 -0.25355 2020 5 30 58999 0.1127 0.4434 -0.25372 2020 5 31 59000 0.1140 0.4434 -0.25410 2020 6 1 59001 0.1153 0.4434 -0.25465 2020 6 2 59002 0.1167 0.4433 -0.25526 2020 6 3 59003 0.1182 0.4431 -0.25583 2020 6 4 59004 0.1198 0.4430 -0.25622 2020 6 5 59005 0.1215 0.4428 -0.25638 2020 6 6 59006 0.1232 0.4428 -0.25627 2020 6 7 59007 0.1250 0.4427 -0.25595 2020 6 8 59008 0.1268 0.4427 -0.25550 2020 6 9 59009 0.1285 0.4427 -0.25502 2020 6 10 59010 0.1302 0.4426 -0.25460 2020 6 11 59011 0.1319 0.4425 -0.25427 2020 6 12 59012 0.1337 0.4424 -0.25405 2020 6 13 59013 0.1354 0.4422 -0.25394 2020 6 14 59014 0.1372 0.4421 -0.25390 2020 6 15 59015 0.1390 0.4419 -0.25390 2020 6 16 59016 0.1407 0.4417 -0.25387 2020 6 17 59017 0.1424 0.4416 -0.25378 2020 6 18 59018 0.1441 0.4413 -0.25360 2020 6 19 59019 0.1458 0.4411 -0.25328 2020 6 20 59020 0.1475 0.4408 -0.25280 2020 6 21 59021 0.1492 0.4405 -0.25218 2020 6 22 59022 0.1509 0.4402 -0.25146 2020 6 23 59023 0.1526 0.4399 -0.25071 2020 6 24 59024 0.1543 0.4395 -0.25002 2020 6 25 59025 0.1559 0.4391 -0.24945 2020 6 26 59026 0.1576 0.4387 -0.24906 2020 6 27 59027 0.1592 0.4383 -0.24884 2020 6 28 59028 0.1609 0.4378 -0.24877 2020 6 29 59029 0.1625 0.4373 -0.24876 2020 6 30 59030 0.1641 0.4368 -0.24871 2020 7 1 59031 0.1657 0.4362 -0.24853 2020 7 2 59032 0.1673 0.4356 -0.24815 2020 7 3 59033 0.1688 0.4350 -0.24755 2020 7 4 59034 0.1704 0.4344 -0.24676 2020 7 5 59035 0.1719 0.4338 -0.24584 2020 7 6 59036 0.1735 0.4331 -0.24488 2020 7 7 59037 0.1750 0.4324 -0.24394 2020 7 8 59038 0.1765 0.4316 -0.24307 2020 7 9 59039 0.1780 0.4309 -0.24230 2020 7 10 59040 0.1795 0.4301 -0.24163 2020 7 11 59041 0.1809 0.4293 -0.24102 2020 7 12 59042 0.1824 0.4284 -0.24045 2020 7 13 59043 0.1838 0.4276 -0.23988 2020 7 14 59044 0.1852 0.4267 -0.23926 2020 7 15 59045 0.1866 0.4258 -0.23858 2020 7 16 59046 0.1880 0.4249 -0.23779 2020 7 17 59047 0.1894 0.4239 -0.23688 2020 7 18 59048 0.1907 0.4230 -0.23587 2020 7 19 59049 0.1920 0.4220 -0.23478 2020 7 20 59050 0.1933 0.4209 -0.23368 2020 7 21 59051 0.1946 0.4199 -0.23266 2020 7 22 59052 0.1959 0.4188 -0.23179 2020 7 23 59053 0.1971 0.4178 -0.23116 2020 7 24 59054 0.1983 0.4167 -0.23076 2020 7 25 59055 0.1995 0.4155 -0.23056 2020 7 26 59056 0.2007 0.4144 -0.23046 2020 7 27 59057 0.2019 0.4132 -0.23037 2020 7 28 59058 0.2030 0.4121 -0.23018 2020 7 29 59059 0.2041 0.4109 -0.22980 2020 7 30 59060 0.2052 0.4096 -0.22920 2020 7 31 59061 0.2063 0.4084 -0.22840 2020 8 1 59062 0.2073 0.4071 -0.22746 2020 8 2 59063 0.2083 0.4059 -0.22647 2020 8 3 59064 0.2093 0.4046 -0.22551 2020 8 4 59065 0.2103 0.4033 -0.22463 2020 8 5 59066 0.2112 0.4020 -0.22388 2020 8 6 59067 0.2121 0.4006 -0.22326 2020 8 7 59068 0.2130 0.3993 -0.22276 2020 8 8 59069 0.2139 0.3979 -0.22234 2020 8 9 59070 0.2147 0.3965 -0.22198 2020 8 10 59071 0.2156 0.3951 -0.22161 2020 8 11 59072 0.2163 0.3937 -0.22120 2020 8 12 59073 0.2171 0.3923 -0.22071 2020 8 13 59074 0.2178 0.3908 -0.22014 2020 8 14 59075 0.2185 0.3894 -0.21947 2020 8 15 59076 0.2192 0.3879 -0.21872 2020 8 16 59077 0.2198 0.3865 -0.21795 2020 8 17 59078 0.2205 0.3850 -0.21722 2020 8 18 59079 0.2211 0.3835 -0.21662 2020 8 19 59080 0.2216 0.3820 -0.21625 2020 8 20 59081 0.2221 0.3805 -0.21615 2020 8 21 59082 0.2226 0.3789 -0.21630 2020 8 22 59083 0.2231 0.3774 -0.21662 2020 8 23 59084 0.2236 0.3759 -0.21698 2020 8 24 59085 0.2240 0.3743 -0.21725 2020 8 25 59086 0.2244 0.3728 -0.21734 2020 8 26 59087 0.2247 0.3712 -0.21720 2020 8 27 59088 0.2250 0.3696 -0.21686 2020 8 28 59089 0.2253 0.3680 -0.21637 2020 8 29 59090 0.2256 0.3665 -0.21582 2020 8 30 59091 0.2258 0.3649 -0.21527 2020 8 31 59092 0.2260 0.3633 -0.21481 2020 9 1 59093 0.2262 0.3617 -0.21446 2020 9 2 59094 0.2263 0.3601 -0.21426 2020 9 3 59095 0.2265 0.3585 -0.21418 2020 9 4 59096 0.2265 0.3569 -0.21420 2020 9 5 59097 0.2266 0.3553 -0.21427 2020 9 6 59098 0.2266 0.3537 -0.21434 2020 9 7 59099 0.2266 0.3521 -0.21437 2020 9 8 59100 0.2265 0.3505 -0.21432 2020 9 9 59101 0.2265 0.3488 -0.21416 2020 9 10 59102 0.2264 0.3472 -0.21390 2020 9 11 59103 0.2262 0.3456 -0.21356 2020 9 12 59104 0.2261 0.3440 -0.21316 2020 9 13 59105 0.2259 0.3424 -0.21279 2020 9 14 59106 0.2256 0.3408 -0.21254 2020 9 15 59107 0.2254 0.3392 -0.21249 2020 9 16 59108 0.2251 0.3376 -0.21272 2020 9 17 59109 0.2248 0.3360 -0.21324 2020 9 18 59110 0.2244 0.3344 -0.21401 2020 9 19 59111 0.2240 0.3329 -0.21488 2020 9 20 59112 0.2236 0.3313 -0.21572 2020 9 21 59113 0.2232 0.3297 -0.21639 2020 9 22 59114 0.2227 0.3281 -0.21681 2020 9 23 59115 0.2222 0.3266 -0.21698 2020 9 24 59116 0.2217 0.3250 -0.21697 2020 9 25 59117 0.2211 0.3235 -0.21685 2020 9 26 59118 0.2205 0.3220 -0.21672 2020 9 27 59119 0.2199 0.3204 -0.21666 2020 9 28 59120 0.2193 0.3189 -0.21671 2020 9 29 59121 0.2186 0.3174 -0.21690 2020 9 30 59122 0.2179 0.3159 -0.21722 2020 10 1 59123 0.2171 0.3144 -0.21764 2020 10 2 59124 0.2164 0.3130 -0.21813 2020 10 3 59125 0.2156 0.3115 -0.21862 2020 10 4 59126 0.2148 0.3101 -0.21908 2020 10 5 59127 0.2139 0.3086 -0.21946 2020 10 6 59128 0.2130 0.3072 -0.21972 2020 10 7 59129 0.2121 0.3058 -0.21986 2020 10 8 59130 0.2112 0.3044 -0.21990 2020 10 9 59131 0.2102 0.3030 -0.21987 2020 10 10 59132 0.2093 0.3017 -0.21982 2020 10 11 59133 0.2083 0.3003 -0.21984 2020 10 12 59134 0.2072 0.2990 -0.22000 2020 10 13 59135 0.2062 0.2976 -0.22041 2020 10 14 59136 0.2051 0.2963 -0.22110 2020 10 15 59137 0.2040 0.2951 -0.22207 2020 10 16 59138 0.2028 0.2938 -0.22323 2020 10 17 59139 0.2017 0.2925 -0.22443 2020 10 18 59140 0.2005 0.2913 -0.22552 2020 10 19 59141 0.1993 0.2901 -0.22638 2020 10 20 59142 0.1980 0.2889 -0.22696 2020 10 21 59143 0.1968 0.2877 -0.22729 2020 10 22 59144 0.1955 0.2866 -0.22745 2020 10 23 59145 0.1942 0.2854 -0.22756 2020 10 24 59146 0.1929 0.2843 -0.22770 2020 10 25 59147 0.1915 0.2832 -0.22793 2020 10 26 59148 0.1902 0.2822 -0.22828 2020 10 27 59149 0.1888 0.2811 -0.22875 2020 10 28 59150 0.1874 0.2801 -0.22932 2020 10 29 59151 0.1859 0.2791 -0.22995 2020 10 30 59152 0.1845 0.2781 -0.23060 2020 10 31 59153 0.1830 0.2771 -0.23121 2020 11 1 59154 0.1815 0.2762 -0.23174 2020 11 2 59155 0.1800 0.2753 -0.23214 2020 11 3 59156 0.1785 0.2744 -0.23242 2020 11 4 59157 0.1770 0.2735 -0.23256 2020 11 5 59158 0.1754 0.2727 -0.23261 2020 11 6 59159 0.1739 0.2719 -0.23260 2020 11 7 59160 0.1723 0.2711 -0.23262 2020 11 8 59161 0.1707 0.2703 -0.23273 2020 11 9 59162 0.1690 0.2696 -0.23303 2020 11 10 59163 0.1674 0.2688 -0.23357 2020 11 11 59164 0.1658 0.2682 -0.23437 2020 11 12 59165 0.1641 0.2675 -0.23540 2020 11 13 59166 0.1624 0.2669 -0.23654 2020 11 14 59167 0.1608 0.2662 -0.23766 2020 11 15 59168 0.1591 0.2657 -0.23861 2020 11 16 59169 0.1574 0.2651 -0.23929 2020 11 17 59170 0.1556 0.2646 -0.23971 2020 11 18 59171 0.1539 0.2641 -0.23992 2020 11 19 59172 0.1522 0.2636 -0.24003 2020 11 20 59173 0.1504 0.2632 -0.24014 2020 11 21 59174 0.1487 0.2627 -0.24033 2020 11 22 59175 0.1469 0.2623 -0.24064 2020 11 23 59176 0.1451 0.2620 -0.24108 2020 11 24 59177 0.1433 0.2616 -0.24163 2020 11 25 59178 0.1416 0.2613 -0.24228 2020 11 26 59179 0.1398 0.2611 -0.24297 2020 11 27 59180 0.1380 0.2608 -0.24367 2020 11 28 59181 0.1362 0.2606 -0.24432 2020 11 29 59182 0.1344 0.2604 -0.24491 2020 11 30 59183 0.1325 0.2602 -0.24539 2020 12 1 59184 0.1307 0.2601 -0.24579 2020 12 2 59185 0.1289 0.2600 -0.24610 2020 12 3 59186 0.1271 0.2599 -0.24636 2020 12 4 59187 0.1253 0.2599 -0.24663 2020 12 5 59188 0.1234 0.2599 -0.24696 2020 12 6 59189 0.1216 0.2599 -0.24739 2020 12 7 59190 0.1198 0.2599 -0.24796 2020 12 8 59191 0.1180 0.2600 -0.24869 2020 12 9 59192 0.1161 0.2601 -0.24956 2020 12 10 59193 0.1143 0.2602 -0.25050 2020 12 11 59194 0.1125 0.2604 -0.25142 2020 12 12 59195 0.1107 0.2606 -0.25218 2020 12 13 59196 0.1089 0.2608 -0.25271 2020 12 14 59197 0.1070 0.2611 -0.25295 2020 12 15 59198 0.1052 0.2613 -0.25295 2020 12 16 59199 0.1034 0.2617 -0.25280 2020 12 17 59200 0.1016 0.2620 -0.25260 2020 12 18 59201 0.0998 0.2624 -0.25245 2020 12 19 59202 0.0981 0.2627 -0.25240 2020 12 20 59203 0.0963 0.2632 -0.25246 2020 12 21 59204 0.0945 0.2636 -0.25262 2020 12 22 59205 0.0927 0.2641 -0.25286 2020 12 23 59206 0.0910 0.2646 -0.25312 2020 12 24 59207 0.0892 0.2652 -0.25338 2020 12 25 59208 0.0875 0.2657 -0.25360 2020 12 26 59209 0.0858 0.2663 -0.25374 2020 12 27 59210 0.0841 0.2669 -0.25379 2020 12 28 59211 0.0824 0.2676 -0.25371 2020 12 29 59212 0.0807 0.2683 -0.25352 2020 12 30 59213 0.0790 0.2690 -0.25324 2020 12 31 59214 0.0773 0.2697 -0.25294 2021 1 1 59215 0.0757 0.2705 -0.25266 2021 1 2 59216 0.0740 0.2712 -0.25248 2021 1 3 59217 0.0724 0.2721 -0.25245 2021 1 4 59218 0.0708 0.2729 -0.25260 2021 1 5 59219 0.0692 0.2738 -0.25295 2021 1 6 59220 0.0676 0.2747 -0.25346 2021 1 7 59221 0.0661 0.2756 -0.25398 2021 1 8 59222 0.0645 0.2765 -0.25440 2021 1 9 59223 0.0630 0.2775 -0.25461 2021 1 10 59224 0.0615 0.2785 -0.25457 2021 1 11 59225 0.0600 0.2795 -0.25431 2021 1 12 59226 0.0585 0.2805 -0.25391 2021 1 13 59227 0.0571 0.2816 -0.25351 2021 1 14 59228 0.0556 0.2827 -0.25316 2021 1 15 59229 0.0542 0.2838 -0.25292 2021 1 16 59230 0.0528 0.2849 -0.25279 2021 1 17 59231 0.0514 0.2861 -0.25278 2021 1 18 59232 0.0501 0.2873 -0.25290 2021 1 19 59233 0.0488 0.2885 -0.25312 2021 1 20 59234 0.0474 0.2897 -0.25338 2021 1 21 59235 0.0462 0.2910 -0.25361 2021 1 22 59236 0.0449 0.2922 -0.25378 2021 1 23 59237 0.0437 0.2935 -0.25380 2021 1 24 59238 0.0424 0.2948 -0.25364 2021 1 25 59239 0.0412 0.2962 -0.25329 2021 1 26 59240 0.0401 0.2975 -0.25277 2021 1 27 59241 0.0389 0.2989 -0.25217 2021 1 28 59242 0.0378 0.3003 -0.25159 2021 1 29 59243 0.0367 0.3017 -0.25114 2021 1 30 59244 0.0357 0.3031 -0.25084 2021 1 31 59245 0.0346 0.3045 -0.25076 2021 2 1 59246 0.0336 0.3060 -0.25090 2021 2 2 59247 0.0326 0.3075 -0.25122 2021 2 3 59248 0.0317 0.3090 -0.25160 2021 2 4 59249 0.0307 0.3105 -0.25191 2021 2 5 59250 0.0298 0.3120 -0.25207 2021 2 6 59251 0.0290 0.3135 -0.25201 2021 2 7 59252 0.0281 0.3151 -0.25173 2021 2 8 59253 0.0273 0.3166 -0.25134 2021 2 9 59254 0.0265 0.3182 -0.25098 2021 2 10 59255 0.0258 0.3198 -0.25066 2021 2 11 59256 0.0250 0.3214 -0.25049 2021 2 12 59257 0.0243 0.3231 -0.25051 2021 2 13 59258 0.0237 0.3247 -0.25065 2021 2 14 59259 0.0230 0.3263 -0.25086 2021 2 15 59260 0.0224 0.3280 -0.25108 2021 2 16 59261 0.0218 0.3296 -0.25131 2021 2 17 59262 0.0213 0.3313 -0.25153 2021 2 18 59263 0.0208 0.3330 -0.25165 2021 2 19 59264 0.0203 0.3347 -0.25168 2021 2 20 59265 0.0198 0.3364 -0.25160 2021 2 21 59266 0.0194 0.3381 -0.25144 2021 2 22 59267 0.0190 0.3398 -0.25122 2021 2 23 59268 0.0187 0.3415 -0.25098 2021 2 24 59269 0.0184 0.3433 -0.25082 2021 2 25 59270 0.0181 0.3450 -0.25087 2021 2 26 59271 0.0178 0.3468 -0.25112 2021 2 27 59272 0.0176 0.3485 -0.25161 2021 2 28 59273 0.0174 0.3503 -0.25238 2021 3 1 59274 0.0172 0.3520 -0.25345 2021 3 2 59275 0.0171 0.3538 -0.25464 2021 3 3 59276 0.0170 0.3555 -0.25584 2021 3 4 59277 0.0169 0.3573 -0.25699 2021 3 5 59278 0.0169 0.3591 -0.25789 2021 3 6 59279 0.0169 0.3608 -0.25857 2021 3 7 59280 0.0169 0.3626 -0.25910 2021 3 8 59281 0.0170 0.3644 -0.25951 2021 3 9 59282 0.0171 0.3661 -0.25985 2021 3 10 59283 0.0172 0.3679 -0.26029 2021 3 11 59284 0.0174 0.3697 -0.26082 2021 3 12 59285 0.0176 0.3714 -0.26145 2021 3 13 59286 0.0178 0.3732 -0.26226 2021 3 14 59287 0.0181 0.3750 -0.26320 2021 3 15 59288 0.0184 0.3767 -0.26421 2021 3 16 59289 0.0187 0.3785 -0.26519 2021 3 17 59290 0.0191 0.3802 -0.26611 2021 3 18 59291 0.0195 0.3819 -0.26697 2021 3 19 59292 0.0199 0.3837 -0.26770 2021 3 20 59293 0.0203 0.3854 -0.26824 2021 3 21 59294 0.0208 0.3871 -0.26863 2021 3 22 59295 0.0214 0.3889 -0.26892 2021 3 23 59296 0.0219 0.3906 -0.26916 2021 3 24 59297 0.0225 0.3923 -0.26947 2021 3 25 59298 0.0231 0.3940 -0.27000 2021 3 26 59299 0.0238 0.3956 -0.27078 2021 3 27 59300 0.0245 0.3973 -0.27194 2021 3 28 59301 0.0252 0.3990 -0.27335 2021 3 29 59302 0.0259 0.4006 -0.27487 2021 3 30 59303 0.0267 0.4023 -0.27640 2021 3 31 59304 0.0275 0.4039 -0.27788 2021 4 1 59305 0.0283 0.4055 -0.27912 2021 4 2 59306 0.0292 0.4071 -0.28011 2021 4 3 59307 0.0301 0.4087 -0.28092 2021 4 4 59308 0.0310 0.4103 -0.28160 2021 4 5 59309 0.0320 0.4119 -0.28223 2021 4 6 59310 0.0329 0.4134 -0.28288 2021 4 7 59311 0.0340 0.4150 -0.28361 2021 4 8 59312 0.0350 0.4165 -0.28445 2021 4 9 59313 0.0361 0.4180 -0.28542 2021 4 10 59314 0.0372 0.4195 -0.28648 2021 4 11 59315 0.0383 0.4209 -0.28758 2021 4 12 59316 0.0395 0.4224 -0.28869 2021 4 13 59317 0.0406 0.4238 -0.28972 2021 4 14 59318 0.0418 0.4253 -0.29065 2021 4 15 59319 0.0431 0.4267 -0.29144 2021 4 16 59320 0.0443 0.4280 -0.29199 2021 4 17 59321 0.0456 0.4294 -0.29238 2021 4 18 59322 0.0469 0.4307 -0.29269 2021 4 19 59323 0.0483 0.4321 -0.29294 2021 4 20 59324 0.0496 0.4334 -0.29316 2021 4 21 59325 0.0510 0.4346 -0.29353 2021 4 22 59326 0.0524 0.4359 -0.29417 2021 4 23 59327 0.0539 0.4371 -0.29501 2021 4 24 59328 0.0553 0.4383 -0.29611 2021 4 25 59329 0.0568 0.4395 -0.29740 2021 4 26 59330 0.0583 0.4407 -0.29877 2021 4 27 59331 0.0598 0.4419 -0.30003 2021 4 28 59332 0.0614 0.4430 -0.30111 2021 4 29 59333 0.0629 0.4441 -0.30195 2021 4 30 59334 0.0645 0.4451 -0.30255 2021 5 1 59335 0.0661 0.4462 -0.30295 2021 5 2 59336 0.0678 0.4472 -0.30327 2021 5 3 59337 0.0694 0.4482 -0.30356 2021 5 4 59338 0.0711 0.4492 -0.30391 2021 5 5 59339 0.0727 0.4501 -0.30439 2021 5 6 59340 0.0744 0.4511 -0.30504 2021 5 7 59341 0.0762 0.4520 -0.30574 2021 5 8 59342 0.0779 0.4528 -0.30646 2021 5 9 59343 0.0796 0.4537 -0.30721 2021 5 10 59344 0.0814 0.4545 -0.30798 2021 5 11 59345 0.0832 0.4553 -0.30869 2021 5 12 59346 0.0850 0.4560 -0.30925 2021 5 13 59347 0.0868 0.4567 -0.30965 2021 5 14 59348 0.0886 0.4574 -0.30989 2021 5 15 59349 0.0905 0.4581 -0.30997 2021 5 16 59350 0.0923 0.4588 -0.31002 2021 5 17 59351 0.0942 0.4594 -0.31009 2021 5 18 59352 0.0961 0.4600 -0.31027 2021 5 19 59353 0.0979 0.4605 -0.31065 2021 5 20 59354 0.0998 0.4610 -0.31122 2021 5 21 59355 0.1017 0.4615 -0.31208 2021 5 22 59356 0.1037 0.4620 -0.31318 2021 5 23 59357 0.1056 0.4624 -0.31440 2021 5 24 59358 0.1075 0.4628 -0.31564 2021 5 25 59359 0.1095 0.4632 -0.31674 2021 5 26 59360 0.1114 0.4636 -0.31755 2021 5 27 59361 0.1134 0.4639 -0.31806 2021 5 28 59362 0.1153 0.4642 -0.31833 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) 58975 -105.20 0.25 -10.30 0.10 58976 -105.91 0.25 -10.38 0.10 58977 -106.31 0.25 -10.46 0.10 58978 -106.27 0.15 -10.43 0.10 58979 -105.91 0.17 -10.38 0.11 58980 -105.52 0.17 -10.49 0.11 58981 -105.36 0.20 -10.71 0.12 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 58975 0.186 0.098 -0.141 0.105 58976 0.162 0.098 -0.144 0.105 58977 0.134 0.098 -0.141 0.105 58978 0.112 0.061 -0.131 0.103 58979 0.095 0.068 -0.113 0.109 58980 0.083 0.068 -0.090 0.109 58981 0.073 0.081 -0.064 0.115 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).