********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 23 April 2020 Vol. XXXIII No. 017 ______________________________________________________________________ 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 4 17 58956 0.06380 .00006 0.42137 .00002 -0.238211 0.000004 20 4 18 58957 0.06435 .00009 0.42293 .00009 -0.238561 0.000004 20 4 19 58958 0.06427 .00009 0.42417 .00009 -0.239012 0.000016 20 4 20 58959 0.06377 .00009 0.42510 .00009 -0.239496 0.000012 20 4 21 58960 0.06333 .00009 0.42585 .00009 -0.239994 0.000013 20 4 22 58961 0.06348 .00009 0.42653 .00009 -0.240476 0.000012 20 4 23 58962 0.06421 .00009 0.42735 .00009 -0.240929 0.000012 _______________________________________________________________________ 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 = 0.1214 - 0.0748 cos A + 0.0736 sin A + 0.0197 cos C + 0.0060 sin C y = 0.3524 + 0.0681 cos A + 0.0686 sin A + 0.0060 cos C - 0.0197 sin C UT1-UTC = -0.2081 - 0.00016 (MJD - 58970) - (UT2-UT1) where A = 2*pi*(MJD-58962)/365.25 and C = 2*pi*(MJD-58962)/435. TAI-UTC(MJD 58963) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58962)**0.80 S t = 0.00025 (MJD-58962)**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 4 24 58963 0.0653 0.4283 -0.24136 2020 4 25 58964 0.0664 0.4293 -0.24169 2020 4 26 58965 0.0677 0.4304 -0.24189 2020 4 27 58966 0.0690 0.4314 -0.24199 2020 4 28 58967 0.0701 0.4325 -0.24203 2020 4 29 58968 0.0713 0.4334 -0.24207 2020 4 30 58969 0.0726 0.4342 -0.24216 2020 5 1 58970 0.0740 0.4349 -0.24238 2020 5 2 58971 0.0756 0.4355 -0.24280 2020 5 3 58972 0.0771 0.4362 -0.24342 2020 5 4 58973 0.0787 0.4369 -0.24424 2020 5 5 58974 0.0804 0.4376 -0.24518 2020 5 6 58975 0.0820 0.4384 -0.24611 2020 5 7 58976 0.0836 0.4391 -0.24690 2020 5 8 58977 0.0853 0.4398 -0.24748 2020 5 9 58978 0.0871 0.4404 -0.24778 2020 5 10 58979 0.0889 0.4409 -0.24785 2020 5 11 58980 0.0908 0.4415 -0.24779 2020 5 12 58981 0.0926 0.4420 -0.24769 2020 5 13 58982 0.0945 0.4426 -0.24761 2020 5 14 58983 0.0963 0.4432 -0.24760 2020 5 15 58984 0.0982 0.4437 -0.24767 2020 5 16 58985 0.1000 0.4442 -0.24783 2020 5 17 58986 0.1018 0.4447 -0.24805 2020 5 18 58987 0.1036 0.4451 -0.24831 2020 5 19 58988 0.1055 0.4455 -0.24855 2020 5 20 58989 0.1073 0.4459 -0.24874 2020 5 21 58990 0.1092 0.4462 -0.24884 2020 5 22 58991 0.1111 0.4466 -0.24881 2020 5 23 58992 0.1129 0.4469 -0.24864 2020 5 24 58993 0.1148 0.4472 -0.24834 2020 5 25 58994 0.1166 0.4475 -0.24794 2020 5 26 58995 0.1185 0.4477 -0.24747 2020 5 27 58996 0.1203 0.4479 -0.24703 2020 5 28 58997 0.1222 0.4480 -0.24668 2020 5 29 58998 0.1240 0.4482 -0.24651 2020 5 30 58999 0.1259 0.4483 -0.24656 2020 5 31 59000 0.1277 0.4484 -0.24683 2020 6 1 59001 0.1296 0.4484 -0.24728 2020 6 2 59002 0.1314 0.4484 -0.24780 2020 6 3 59003 0.1333 0.4484 -0.24827 2020 6 4 59004 0.1351 0.4484 -0.24859 2020 6 5 59005 0.1370 0.4483 -0.24866 2020 6 6 59006 0.1388 0.4482 -0.24847 2020 6 7 59007 0.1407 0.4480 -0.24806 2020 6 8 59008 0.1426 0.4479 -0.24753 2020 6 9 59009 0.1444 0.4477 -0.24694 2020 6 10 59010 0.1462 0.4474 -0.24639 2020 6 11 59011 0.1481 0.4472 -0.24591 2020 6 12 59012 0.1499 0.4469 -0.24553 2020 6 13 59013 0.1518 0.4465 -0.24523 2020 6 14 59014 0.1536 0.4462 -0.24500 2020 6 15 59015 0.1554 0.4458 -0.24481 2020 6 16 59016 0.1572 0.4454 -0.24460 2020 6 17 59017 0.1591 0.4449 -0.24435 2020 6 18 59018 0.1609 0.4444 -0.24402 2020 6 19 59019 0.1627 0.4439 -0.24357 2020 6 20 59020 0.1645 0.4434 -0.24300 2020 6 21 59021 0.1662 0.4428 -0.24232 2020 6 22 59022 0.1680 0.4422 -0.24156 2020 6 23 59023 0.1698 0.4416 -0.24080 2020 6 24 59024 0.1715 0.4410 -0.24012 2020 6 25 59025 0.1733 0.4403 -0.23957 2020 6 26 59026 0.1750 0.4396 -0.23922 2020 6 27 59027 0.1767 0.4389 -0.23906 2020 6 28 59028 0.1784 0.4381 -0.23906 2020 6 29 59029 0.1801 0.4373 -0.23914 2020 6 30 59030 0.1818 0.4365 -0.23920 2020 7 1 59031 0.1835 0.4357 -0.23914 2020 7 2 59032 0.1851 0.4348 -0.23888 2020 7 3 59033 0.1867 0.4339 -0.23839 2020 7 4 59034 0.1884 0.4330 -0.23769 2020 7 5 59035 0.1900 0.4320 -0.23686 2020 7 6 59036 0.1915 0.4311 -0.23598 2020 7 7 59037 0.1931 0.4301 -0.23511 2020 7 8 59038 0.1946 0.4291 -0.23433 2020 7 9 59039 0.1962 0.4280 -0.23364 2020 7 10 59040 0.1977 0.4270 -0.23305 2020 7 11 59041 0.1992 0.4259 -0.23254 2020 7 12 59042 0.2006 0.4247 -0.23207 2020 7 13 59043 0.2021 0.4236 -0.23161 2020 7 14 59044 0.2035 0.4224 -0.23110 2020 7 15 59045 0.2049 0.4213 -0.23052 2020 7 16 59046 0.2063 0.4200 -0.22983 2020 7 17 59047 0.2076 0.4188 -0.22901 2020 7 18 59048 0.2090 0.4176 -0.22807 2020 7 19 59049 0.2103 0.4163 -0.22705 2020 7 20 59050 0.2115 0.4150 -0.22600 2020 7 21 59051 0.2128 0.4137 -0.22500 2020 7 22 59052 0.2140 0.4123 -0.22416 2020 7 23 59053 0.2153 0.4110 -0.22353 2020 7 24 59054 0.2164 0.4096 -0.22314 2020 7 25 59055 0.2176 0.4082 -0.22293 2020 7 26 59056 0.2187 0.4068 -0.22283 2020 7 27 59057 0.2198 0.4054 -0.22273 2020 7 28 59058 0.2209 0.4039 -0.22252 2020 7 29 59059 0.2220 0.4025 -0.22212 2020 7 30 59060 0.2230 0.4010 -0.22150 2020 7 31 59061 0.2240 0.3995 -0.22069 2020 8 1 59062 0.2250 0.3980 -0.21973 2020 8 2 59063 0.2259 0.3964 -0.21872 2020 8 3 59064 0.2268 0.3949 -0.21773 2020 8 4 59065 0.2277 0.3933 -0.21682 2020 8 5 59066 0.2285 0.3917 -0.21603 2020 8 6 59067 0.2294 0.3902 -0.21537 2020 8 7 59068 0.2302 0.3885 -0.21482 2020 8 8 59069 0.2309 0.3869 -0.21434 2020 8 9 59070 0.2316 0.3853 -0.21390 2020 8 10 59071 0.2323 0.3837 -0.21347 2020 8 11 59072 0.2330 0.3820 -0.21297 2020 8 12 59073 0.2336 0.3803 -0.21239 2020 8 13 59074 0.2343 0.3787 -0.21170 2020 8 14 59075 0.2348 0.3770 -0.21091 2020 8 15 59076 0.2354 0.3753 -0.21004 2020 8 16 59077 0.2359 0.3736 -0.20914 2020 8 17 59078 0.2364 0.3719 -0.20829 2020 8 18 59079 0.2368 0.3702 -0.20757 2020 8 19 59080 0.2372 0.3684 -0.20709 2020 8 20 59081 0.2376 0.3667 -0.20688 2020 8 21 59082 0.2379 0.3650 -0.20691 2020 8 22 59083 0.2382 0.3632 -0.20711 2020 8 23 59084 0.2385 0.3615 -0.20735 2020 8 24 59085 0.2388 0.3597 -0.20750 2020 8 25 59086 0.2390 0.3580 -0.20746 2020 8 26 59087 0.2392 0.3562 -0.20719 2020 8 27 59088 0.2393 0.3544 -0.20672 2020 8 28 59089 0.2394 0.3527 -0.20610 2020 8 29 59090 0.2395 0.3509 -0.20542 2020 8 30 59091 0.2395 0.3491 -0.20475 2020 8 31 59092 0.2395 0.3474 -0.20417 2020 9 1 59093 0.2395 0.3456 -0.20371 2020 9 2 59094 0.2394 0.3438 -0.20339 2020 9 3 59095 0.2394 0.3421 -0.20320 2020 9 4 59096 0.2392 0.3403 -0.20311 2020 9 5 59097 0.2391 0.3385 -0.20307 2020 9 6 59098 0.2389 0.3368 -0.20304 2020 9 7 59099 0.2386 0.3350 -0.20296 2020 9 8 59100 0.2384 0.3332 -0.20280 2020 9 9 59101 0.2381 0.3315 -0.20255 2020 9 10 59102 0.2377 0.3297 -0.20219 2020 9 11 59103 0.2374 0.3280 -0.20175 2020 9 12 59104 0.2370 0.3263 -0.20127 2020 9 13 59105 0.2365 0.3245 -0.20081 2020 9 14 59106 0.2361 0.3228 -0.20046 2020 9 15 59107 0.2356 0.3211 -0.20033 2020 9 16 59108 0.2350 0.3194 -0.20046 2020 9 17 59109 0.2345 0.3177 -0.20090 2020 9 18 59110 0.2339 0.3160 -0.20158 2020 9 19 59111 0.2332 0.3143 -0.20237 2020 9 20 59112 0.2326 0.3126 -0.20313 2020 9 21 59113 0.2319 0.3109 -0.20372 2020 9 22 59114 0.2312 0.3093 -0.20406 2020 9 23 59115 0.2304 0.3077 -0.20416 2020 9 24 59116 0.2296 0.3060 -0.20407 2020 9 25 59117 0.2288 0.3044 -0.20389 2020 9 26 59118 0.2279 0.3028 -0.20369 2020 9 27 59119 0.2270 0.3012 -0.20356 2020 9 28 59120 0.2261 0.2996 -0.20355 2020 9 29 59121 0.2252 0.2981 -0.20368 2020 9 30 59122 0.2242 0.2965 -0.20394 2020 10 1 59123 0.2232 0.2950 -0.20431 2020 10 2 59124 0.2221 0.2935 -0.20474 2020 10 3 59125 0.2211 0.2920 -0.20519 2020 10 4 59126 0.2200 0.2905 -0.20560 2020 10 5 59127 0.2188 0.2890 -0.20593 2020 10 6 59128 0.2177 0.2876 -0.20615 2020 10 7 59129 0.2165 0.2861 -0.20626 2020 10 8 59130 0.2153 0.2847 -0.20626 2020 10 9 59131 0.2140 0.2833 -0.20619 2020 10 10 59132 0.2128 0.2820 -0.20612 2020 10 11 59133 0.2115 0.2806 -0.20611 2020 10 12 59134 0.2102 0.2793 -0.20626 2020 10 13 59135 0.2088 0.2780 -0.20664 2020 10 14 59136 0.2074 0.2767 -0.20732 2020 10 15 59137 0.2060 0.2754 -0.20829 2020 10 16 59138 0.2046 0.2742 -0.20945 2020 10 17 59139 0.2032 0.2729 -0.21066 2020 10 18 59140 0.2017 0.2717 -0.21176 2020 10 19 59141 0.2002 0.2706 -0.21264 2020 10 20 59142 0.1987 0.2694 -0.21325 2020 10 21 59143 0.1971 0.2683 -0.21362 2020 10 22 59144 0.1956 0.2672 -0.21384 2020 10 23 59145 0.1940 0.2661 -0.21401 2020 10 24 59146 0.1924 0.2650 -0.21422 2020 10 25 59147 0.1907 0.2640 -0.21454 2020 10 26 59148 0.1891 0.2630 -0.21497 2020 10 27 59149 0.1874 0.2620 -0.21553 2020 10 28 59150 0.1857 0.2611 -0.21619 2020 10 29 59151 0.1840 0.2601 -0.21691 2020 10 30 59152 0.1823 0.2592 -0.21763 2020 10 31 59153 0.1805 0.2584 -0.21830 2020 11 1 59154 0.1788 0.2575 -0.21888 2020 11 2 59155 0.1770 0.2567 -0.21932 2020 11 3 59156 0.1752 0.2559 -0.21961 2020 11 4 59157 0.1734 0.2552 -0.21977 2020 11 5 59158 0.1715 0.2544 -0.21981 2020 11 6 59159 0.1697 0.2537 -0.21980 2020 11 7 59160 0.1678 0.2530 -0.21979 2020 11 8 59161 0.1660 0.2524 -0.21986 2020 11 9 59162 0.1641 0.2518 -0.22008 2020 11 10 59163 0.1622 0.2512 -0.22052 2020 11 11 59164 0.1603 0.2507 -0.22121 2020 11 12 59165 0.1583 0.2501 -0.22209 2020 11 13 59166 0.1564 0.2496 -0.22309 2020 11 14 59167 0.1545 0.2492 -0.22405 2020 11 15 59168 0.1525 0.2487 -0.22484 2020 11 16 59169 0.1505 0.2483 -0.22536 2020 11 17 59170 0.1486 0.2480 -0.22558 2020 11 18 59171 0.1466 0.2476 -0.22557 2020 11 19 59172 0.1446 0.2473 -0.22539 2020 11 20 59173 0.1426 0.2471 -0.22515 2020 11 21 59174 0.1406 0.2468 -0.22494 2020 11 22 59175 0.1386 0.2466 -0.22479 2020 11 23 59176 0.1366 0.2464 -0.22474 2020 11 24 59177 0.1346 0.2463 -0.22476 2020 11 25 59178 0.1325 0.2462 -0.22484 2020 11 26 59179 0.1305 0.2461 -0.22494 2020 11 27 59180 0.1285 0.2460 -0.22500 2020 11 28 59181 0.1264 0.2460 -0.22497 2020 11 29 59182 0.1244 0.2460 -0.22483 2020 11 30 59183 0.1224 0.2461 -0.22460 2020 12 1 59184 0.1203 0.2461 -0.22430 2020 12 2 59185 0.1183 0.2462 -0.22394 2020 12 3 59186 0.1163 0.2464 -0.22354 2020 12 4 59187 0.1143 0.2466 -0.22317 2020 12 5 59188 0.1122 0.2468 -0.22286 2020 12 6 59189 0.1102 0.2470 -0.22262 2020 12 7 59190 0.1082 0.2473 -0.22251 2020 12 8 59191 0.1062 0.2476 -0.22264 2020 12 9 59192 0.1041 0.2479 -0.22299 2020 12 10 59193 0.1021 0.2483 -0.22348 2020 12 11 59194 0.1001 0.2487 -0.22401 2020 12 12 59195 0.0981 0.2491 -0.22447 2020 12 13 59196 0.0961 0.2496 -0.22476 2020 12 14 59197 0.0942 0.2501 -0.22483 2020 12 15 59198 0.0922 0.2506 -0.22470 2020 12 16 59199 0.0902 0.2511 -0.22447 2020 12 17 59200 0.0883 0.2517 -0.22430 2020 12 18 59201 0.0863 0.2523 -0.22419 2020 12 19 59202 0.0844 0.2530 -0.22415 2020 12 20 59203 0.0824 0.2537 -0.22424 2020 12 21 59204 0.0805 0.2544 -0.22453 2020 12 22 59205 0.0786 0.2551 -0.22490 2020 12 23 59206 0.0767 0.2559 -0.22535 2020 12 24 59207 0.0749 0.2567 -0.22586 2020 12 25 59208 0.0730 0.2575 -0.22629 2020 12 26 59209 0.0712 0.2584 -0.22664 2020 12 27 59210 0.0693 0.2593 -0.22690 2020 12 28 59211 0.0675 0.2602 -0.22699 2020 12 29 59212 0.0657 0.2611 -0.22692 2020 12 30 59213 0.0639 0.2621 -0.22678 2020 12 31 59214 0.0622 0.2631 -0.22658 2021 1 1 59215 0.0604 0.2641 -0.22639 2021 1 2 59216 0.0587 0.2652 -0.22637 2021 1 3 59217 0.0570 0.2663 -0.22656 2021 1 4 59218 0.0553 0.2674 -0.22700 2021 1 5 59219 0.0536 0.2685 -0.22765 2021 1 6 59220 0.0520 0.2697 -0.22846 2021 1 7 59221 0.0503 0.2709 -0.22936 2021 1 8 59222 0.0487 0.2721 -0.23022 2021 1 9 59223 0.0471 0.2734 -0.23086 2021 1 10 59224 0.0456 0.2746 -0.23125 2021 1 11 59225 0.0440 0.2759 -0.23139 2021 1 12 59226 0.0425 0.2773 -0.23134 2021 1 13 59227 0.0410 0.2786 -0.23123 2021 1 14 59228 0.0396 0.2800 -0.23121 2021 1 15 59229 0.0381 0.2814 -0.23131 2021 1 16 59230 0.0367 0.2828 -0.23166 2021 1 17 59231 0.0353 0.2842 -0.23212 2021 1 18 59232 0.0339 0.2857 -0.23261 2021 1 19 59233 0.0326 0.2872 -0.23314 2021 1 20 59234 0.0313 0.2887 -0.23372 2021 1 21 59235 0.0300 0.2902 -0.23426 2021 1 22 59236 0.0287 0.2917 -0.23473 2021 1 23 59237 0.0275 0.2933 -0.23514 2021 1 24 59238 0.0263 0.2949 -0.23545 2021 1 25 59239 0.0251 0.2965 -0.23564 2021 1 26 59240 0.0240 0.2981 -0.23574 2021 1 27 59241 0.0229 0.2997 -0.23578 2021 1 28 59242 0.0218 0.3014 -0.23584 2021 1 29 59243 0.0208 0.3031 -0.23601 2021 1 30 59244 0.0197 0.3048 -0.23640 2021 1 31 59245 0.0187 0.3065 -0.23702 2021 2 1 59246 0.0178 0.3082 -0.23788 2021 2 2 59247 0.0169 0.3099 -0.23889 2021 2 3 59248 0.0160 0.3117 -0.23999 2021 2 4 59249 0.0151 0.3135 -0.24103 2021 2 5 59250 0.0143 0.3152 -0.24185 2021 2 6 59251 0.0135 0.3170 -0.24245 2021 2 7 59252 0.0127 0.3189 -0.24285 2021 2 8 59253 0.0120 0.3207 -0.24309 2021 2 9 59254 0.0113 0.3225 -0.24318 2021 2 10 59255 0.0106 0.3244 -0.24334 2021 2 11 59256 0.0100 0.3262 -0.24369 2021 2 12 59257 0.0094 0.3281 -0.24415 2021 2 13 59258 0.0089 0.3299 -0.24474 2021 2 14 59259 0.0083 0.3318 -0.24543 2021 2 15 59260 0.0078 0.3337 -0.24617 2021 2 16 59261 0.0074 0.3356 -0.24688 2021 2 17 59262 0.0070 0.3375 -0.24756 2021 2 18 59263 0.0066 0.3394 -0.24820 2021 2 19 59264 0.0062 0.3414 -0.24877 2021 2 20 59265 0.0059 0.3433 -0.24924 2021 2 21 59266 0.0057 0.3452 -0.24962 2021 2 22 59267 0.0054 0.3472 -0.24987 2021 2 23 59268 0.0052 0.3491 -0.25006 2021 2 24 59269 0.0050 0.3510 -0.25028 2021 2 25 59270 0.0049 0.3530 -0.25066 2021 2 26 59271 0.0048 0.3549 -0.25120 2021 2 27 59272 0.0048 0.3569 -0.25198 2021 2 28 59273 0.0047 0.3588 -0.25306 2021 3 1 59274 0.0048 0.3608 -0.25444 2021 3 2 59275 0.0048 0.3628 -0.25598 2021 3 3 59276 0.0049 0.3647 -0.25749 2021 3 4 59277 0.0050 0.3667 -0.25886 2021 3 5 59278 0.0052 0.3686 -0.26001 2021 3 6 59279 0.0054 0.3706 -0.26090 2021 3 7 59280 0.0056 0.3725 -0.26163 2021 3 8 59281 0.0059 0.3744 -0.26228 2021 3 9 59282 0.0062 0.3764 -0.26298 2021 3 10 59283 0.0065 0.3783 -0.26382 2021 3 11 59284 0.0069 0.3802 -0.26478 2021 3 12 59285 0.0073 0.3822 -0.26595 2021 3 13 59286 0.0078 0.3841 -0.26726 2021 3 14 59287 0.0083 0.3860 -0.26865 2021 3 15 59288 0.0088 0.3879 -0.27006 2021 3 16 59289 0.0093 0.3898 -0.27144 2021 3 17 59290 0.0099 0.3917 -0.27269 2021 3 18 59291 0.0106 0.3935 -0.27381 2021 3 19 59292 0.0112 0.3954 -0.27482 2021 3 20 59293 0.0119 0.3973 -0.27569 2021 3 21 59294 0.0127 0.3991 -0.27642 2021 3 22 59295 0.0134 0.4009 -0.27706 2021 3 23 59296 0.0142 0.4028 -0.27768 2021 3 24 59297 0.0151 0.4046 -0.27836 2021 3 25 59298 0.0160 0.4064 -0.27918 2021 3 26 59299 0.0169 0.4082 -0.28026 2021 3 27 59300 0.0178 0.4099 -0.28166 2021 3 28 59301 0.0188 0.4117 -0.28337 2021 3 29 59302 0.0198 0.4134 -0.28525 2021 3 30 59303 0.0208 0.4151 -0.28712 2021 3 31 59304 0.0219 0.4169 -0.28886 2021 4 1 59305 0.0230 0.4185 -0.29039 2021 4 2 59306 0.0242 0.4202 -0.29160 2021 4 3 59307 0.0253 0.4219 -0.29255 2021 4 4 59308 0.0265 0.4235 -0.29334 2021 4 5 59309 0.0278 0.4251 -0.29405 2021 4 6 59310 0.0290 0.4267 -0.29484 2021 4 7 59311 0.0303 0.4283 -0.29577 2021 4 8 59312 0.0316 0.4299 -0.29684 2021 4 9 59313 0.0330 0.4314 -0.29808 2021 4 10 59314 0.0344 0.4329 -0.29941 2021 4 11 59315 0.0358 0.4344 -0.30077 2021 4 12 59316 0.0372 0.4359 -0.30206 2021 4 13 59317 0.0387 0.4374 -0.30329 2021 4 14 59318 0.0402 0.4388 -0.30442 2021 4 15 59319 0.0417 0.4402 -0.30539 2021 4 16 59320 0.0433 0.4416 -0.30627 2021 4 17 59321 0.0448 0.4430 -0.30702 2021 4 18 59322 0.0465 0.4443 -0.30763 2021 4 19 59323 0.0481 0.4456 -0.30815 2021 4 20 59324 0.0497 0.4469 -0.30863 2021 4 21 59325 0.0514 0.4482 -0.30921 2021 4 22 59326 0.0531 0.4494 -0.30997 2021 4 23 59327 0.0548 0.4506 -0.31099 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) 58940 -105.86 0.29 -9.80 0.08 58941 -105.65 0.29 -9.76 0.08 58942 -105.61 0.29 -9.82 0.08 58943 -105.64 0.41 -10.11 0.15 58944 -105.40 0.39 -10.39 0.14 58945 -104.91 0.39 -10.37 0.14 58946 -104.65 0.39 -10.08 0.13 58947 -104.96 0.39 -9.86 0.13 58948 -105.60 0.39 -9.86 0.13 58949 -106.07 0.39 -9.94 0.13 58950 -106.11 0.32 -9.97 0.16 58951 -105.82 0.32 -10.02 0.16 58952 -105.51 0.32 -10.22 0.09 58953 -105.45 0.32 -10.44 0.09 58954 -105.66 0.32 -10.52 0.09 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 58940 0.242 0.117 -0.076 0.083 58941 0.246 0.117 -0.090 0.083 58942 0.241 0.117 -0.101 0.083 58943 0.231 0.162 -0.109 0.149 58944 0.221 0.156 -0.113 0.136 58945 0.210 0.156 -0.114 0.136 58946 0.200 0.155 -0.113 0.133 58947 0.190 0.155 -0.110 0.133 58948 0.180 0.155 -0.106 0.133 58949 0.171 0.155 -0.100 0.133 58950 0.162 0.128 -0.093 0.160 58951 0.153 0.128 -0.086 0.160 58952 0.144 0.126 -0.078 0.094 58953 0.136 0.126 -0.069 0.094 58954 0.128 0.126 -0.060 0.094 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).