********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 19 March 2020 Vol. XXXIII No. 012 ______________________________________________________________________ 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 3 13 58921 0.03041 .00009 0.37549 .00009 -0.216147 0.000013 20 3 14 58922 0.03181 .00009 0.37748 .00009 -0.217284 0.000012 20 3 15 58923 0.03312 .00009 0.37935 .00009 -0.218156 0.000014 20 3 16 58924 0.03409 .00009 0.38087 .00009 -0.218786 0.000010 20 3 17 58925 0.03479 .00009 0.38209 .00009 -0.219267 0.000010 20 3 18 58926 0.03557 .00009 0.38306 .00009 -0.219633 0.000011 20 3 19 58927 0.03669 .00009 0.38398 .00009 -0.219929 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 = 0.1275 - 0.0974 cos A + 0.0148 sin A + 0.0057 cos C + 0.0140 sin C y = 0.3559 + 0.0143 cos A + 0.0869 sin A + 0.0140 cos C - 0.0057 sin C UT1-UTC = -0.2057 - 0.00019 (MJD - 58935) - (UT2-UT1) where A = 2*pi*(MJD-58927)/365.25 and C = 2*pi*(MJD-58927)/435. TAI-UTC(MJD 58928) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58927)**0.80 S t = 0.00025 (MJD-58927)**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 3 20 58928 0.0379 0.3851 -0.22025 2020 3 21 58929 0.0392 0.3864 -0.22061 2020 3 22 58930 0.0404 0.3878 -0.22102 2020 3 23 58931 0.0414 0.3893 -0.22151 2020 3 24 58932 0.0423 0.3908 -0.22209 2020 3 25 58933 0.0431 0.3923 -0.22273 2020 3 26 58934 0.0439 0.3936 -0.22336 2020 3 27 58935 0.0448 0.3950 -0.22394 2020 3 28 58936 0.0457 0.3963 -0.22446 2020 3 29 58937 0.0466 0.3976 -0.22488 2020 3 30 58938 0.0476 0.3989 -0.22521 2020 3 31 58939 0.0485 0.4001 -0.22547 2020 4 1 58940 0.0495 0.4015 -0.22572 2020 4 2 58941 0.0504 0.4028 -0.22602 2020 4 3 58942 0.0513 0.4041 -0.22644 2020 4 4 58943 0.0522 0.4054 -0.22705 2020 4 5 58944 0.0532 0.4066 -0.22796 2020 4 6 58945 0.0542 0.4078 -0.22916 2020 4 7 58946 0.0552 0.4090 -0.23061 2020 4 8 58947 0.0562 0.4102 -0.23219 2020 4 9 58948 0.0573 0.4114 -0.23372 2020 4 10 58949 0.0584 0.4126 -0.23506 2020 4 11 58950 0.0595 0.4138 -0.23615 2020 4 12 58951 0.0606 0.4149 -0.23696 2020 4 13 58952 0.0618 0.4160 -0.23756 2020 4 14 58953 0.0630 0.4171 -0.23803 2020 4 15 58954 0.0642 0.4181 -0.23844 2020 4 16 58955 0.0654 0.4191 -0.23884 2020 4 17 58956 0.0667 0.4202 -0.23929 2020 4 18 58957 0.0680 0.4211 -0.23983 2020 4 19 58958 0.0693 0.4221 -0.24046 2020 4 20 58959 0.0706 0.4231 -0.24117 2020 4 21 58960 0.0720 0.4240 -0.24194 2020 4 22 58961 0.0734 0.4249 -0.24272 2020 4 23 58962 0.0748 0.4258 -0.24348 2020 4 24 58963 0.0762 0.4267 -0.24416 2020 4 25 58964 0.0776 0.4275 -0.24474 2020 4 26 58965 0.0791 0.4283 -0.24521 2020 4 27 58966 0.0806 0.4291 -0.24557 2020 4 28 58967 0.0821 0.4299 -0.24585 2020 4 29 58968 0.0836 0.4306 -0.24611 2020 4 30 58969 0.0851 0.4314 -0.24641 2020 5 1 58970 0.0866 0.4321 -0.24685 2020 5 2 58971 0.0882 0.4328 -0.24749 2020 5 3 58972 0.0898 0.4334 -0.24836 2020 5 4 58973 0.0914 0.4341 -0.24946 2020 5 5 58974 0.0930 0.4347 -0.25069 2020 5 6 58975 0.0946 0.4353 -0.25194 2020 5 7 58976 0.0962 0.4358 -0.25306 2020 5 8 58977 0.0979 0.4364 -0.25395 2020 5 9 58978 0.0995 0.4369 -0.25457 2020 5 10 58979 0.1012 0.4374 -0.25493 2020 5 11 58980 0.1029 0.4378 -0.25511 2020 5 12 58981 0.1045 0.4383 -0.25520 2020 5 13 58982 0.1062 0.4387 -0.25528 2020 5 14 58983 0.1079 0.4391 -0.25541 2020 5 15 58984 0.1097 0.4395 -0.25561 2020 5 16 58985 0.1114 0.4398 -0.25589 2020 5 17 58986 0.1131 0.4401 -0.25623 2020 5 18 58987 0.1148 0.4404 -0.25662 2020 5 19 58988 0.1166 0.4406 -0.25702 2020 5 20 58989 0.1183 0.4409 -0.25738 2020 5 21 58990 0.1201 0.4411 -0.25765 2020 5 22 58991 0.1218 0.4413 -0.25780 2020 5 23 58992 0.1236 0.4414 -0.25781 2020 5 24 58993 0.1254 0.4415 -0.25766 2020 5 25 58994 0.1271 0.4416 -0.25739 2020 5 26 58995 0.1289 0.4417 -0.25704 2020 5 27 58996 0.1307 0.4417 -0.25670 2020 5 28 58997 0.1324 0.4418 -0.25642 2020 5 29 58998 0.1342 0.4417 -0.25630 2020 5 30 58999 0.1360 0.4417 -0.25638 2020 5 31 59000 0.1378 0.4416 -0.25666 2020 6 1 59001 0.1396 0.4415 -0.25710 2020 6 2 59002 0.1413 0.4414 -0.25761 2020 6 3 59003 0.1431 0.4413 -0.25807 2020 6 4 59004 0.1449 0.4411 -0.25836 2020 6 5 59005 0.1466 0.4409 -0.25840 2020 6 6 59006 0.1484 0.4406 -0.25818 2020 6 7 59007 0.1502 0.4404 -0.25774 2020 6 8 59008 0.1519 0.4401 -0.25717 2020 6 9 59009 0.1537 0.4398 -0.25657 2020 6 10 59010 0.1554 0.4394 -0.25598 2020 6 11 59011 0.1572 0.4391 -0.25547 2020 6 12 59012 0.1589 0.4387 -0.25504 2020 6 13 59013 0.1607 0.4383 -0.25470 2020 6 14 59014 0.1624 0.4378 -0.25441 2020 6 15 59015 0.1641 0.4373 -0.25416 2020 6 16 59016 0.1658 0.4368 -0.25388 2020 6 17 59017 0.1675 0.4363 -0.25354 2020 6 18 59018 0.1692 0.4357 -0.25310 2020 6 19 59019 0.1709 0.4352 -0.25251 2020 6 20 59020 0.1725 0.4345 -0.25178 2020 6 21 59021 0.1742 0.4339 -0.25091 2020 6 22 59022 0.1759 0.4333 -0.24995 2020 6 23 59023 0.1775 0.4326 -0.24896 2020 6 24 59024 0.1791 0.4319 -0.24804 2020 6 25 59025 0.1807 0.4311 -0.24727 2020 6 26 59026 0.1823 0.4304 -0.24668 2020 6 27 59027 0.1839 0.4296 -0.24630 2020 6 28 59028 0.1855 0.4288 -0.24608 2020 6 29 59029 0.1870 0.4279 -0.24593 2020 6 30 59030 0.1886 0.4271 -0.24576 2020 7 1 59031 0.1901 0.4262 -0.24546 2020 7 2 59032 0.1916 0.4253 -0.24495 2020 7 3 59033 0.1931 0.4244 -0.24421 2020 7 4 59034 0.1945 0.4234 -0.24327 2020 7 5 59035 0.1960 0.4224 -0.24219 2020 7 6 59036 0.1974 0.4214 -0.24114 2020 7 7 59037 0.1988 0.4204 -0.24013 2020 7 8 59038 0.2002 0.4194 -0.23919 2020 7 9 59039 0.2016 0.4183 -0.23837 2020 7 10 59040 0.2030 0.4172 -0.23766 2020 7 11 59041 0.2043 0.4161 -0.23703 2020 7 12 59042 0.2056 0.4150 -0.23646 2020 7 13 59043 0.2069 0.4138 -0.23589 2020 7 14 59044 0.2082 0.4127 -0.23529 2020 7 15 59045 0.2094 0.4115 -0.23461 2020 7 16 59046 0.2106 0.4103 -0.23383 2020 7 17 59047 0.2118 0.4090 -0.23292 2020 7 18 59048 0.2130 0.4078 -0.23190 2020 7 19 59049 0.2142 0.4065 -0.23080 2020 7 20 59050 0.2153 0.4052 -0.22967 2020 7 21 59051 0.2164 0.4039 -0.22861 2020 7 22 59052 0.2175 0.4026 -0.22771 2020 7 23 59053 0.2186 0.4013 -0.22702 2020 7 24 59054 0.2196 0.3999 -0.22657 2020 7 25 59055 0.2206 0.3986 -0.22630 2020 7 26 59056 0.2216 0.3972 -0.22615 2020 7 27 59057 0.2225 0.3958 -0.22599 2020 7 28 59058 0.2235 0.3944 -0.22572 2020 7 29 59059 0.2244 0.3929 -0.22526 2020 7 30 59060 0.2252 0.3915 -0.22460 2020 7 31 59061 0.2261 0.3900 -0.22374 2020 8 1 59062 0.2269 0.3886 -0.22274 2020 8 2 59063 0.2277 0.3871 -0.22170 2020 8 3 59064 0.2284 0.3856 -0.22068 2020 8 4 59065 0.2292 0.3841 -0.21975 2020 8 5 59066 0.2299 0.3825 -0.21894 2020 8 6 59067 0.2306 0.3810 -0.21826 2020 8 7 59068 0.2312 0.3795 -0.21770 2020 8 8 59069 0.2318 0.3779 -0.21722 2020 8 9 59070 0.2324 0.3764 -0.21677 2020 8 10 59071 0.2329 0.3748 -0.21631 2020 8 11 59072 0.2335 0.3732 -0.21580 2020 8 12 59073 0.2340 0.3716 -0.21520 2020 8 13 59074 0.2344 0.3700 -0.21450 2020 8 14 59075 0.2349 0.3684 -0.21370 2020 8 15 59076 0.2353 0.3668 -0.21282 2020 8 16 59077 0.2356 0.3652 -0.21192 2020 8 17 59078 0.2360 0.3636 -0.21107 2020 8 18 59079 0.2363 0.3619 -0.21036 2020 8 19 59080 0.2365 0.3603 -0.20988 2020 8 20 59081 0.2368 0.3586 -0.20968 2020 8 21 59082 0.2370 0.3570 -0.20972 2020 8 22 59083 0.2372 0.3554 -0.20994 2020 8 23 59084 0.2373 0.3537 -0.21019 2020 8 24 59085 0.2374 0.3520 -0.21035 2020 8 25 59086 0.2375 0.3504 -0.21032 2020 8 26 59087 0.2376 0.3487 -0.21008 2020 8 27 59088 0.2376 0.3471 -0.20963 2020 8 28 59089 0.2376 0.3454 -0.20903 2020 8 29 59090 0.2375 0.3438 -0.20837 2020 8 30 59091 0.2375 0.3421 -0.20773 2020 8 31 59092 0.2374 0.3404 -0.20717 2020 9 1 59093 0.2372 0.3388 -0.20674 2020 9 2 59094 0.2370 0.3371 -0.20645 2020 9 3 59095 0.2368 0.3355 -0.20629 2020 9 4 59096 0.2366 0.3338 -0.20622 2020 9 5 59097 0.2363 0.3322 -0.20621 2020 9 6 59098 0.2360 0.3305 -0.20620 2020 9 7 59099 0.2357 0.3289 -0.20615 2020 9 8 59100 0.2353 0.3273 -0.20601 2020 9 9 59101 0.2349 0.3256 -0.20577 2020 9 10 59102 0.2345 0.3240 -0.20541 2020 9 11 59103 0.2340 0.3224 -0.20497 2020 9 12 59104 0.2335 0.3208 -0.20448 2020 9 13 59105 0.2330 0.3192 -0.20399 2020 9 14 59106 0.2324 0.3176 -0.20361 2020 9 15 59107 0.2319 0.3160 -0.20341 2020 9 16 59108 0.2312 0.3144 -0.20347 2020 9 17 59109 0.2306 0.3128 -0.20380 2020 9 18 59110 0.2299 0.3113 -0.20435 2020 9 19 59111 0.2292 0.3097 -0.20497 2020 9 20 59112 0.2285 0.3082 -0.20551 2020 9 21 59113 0.2277 0.3067 -0.20584 2020 9 22 59114 0.2269 0.3051 -0.20587 2020 9 23 59115 0.2260 0.3036 -0.20559 2020 9 24 59116 0.2252 0.3022 -0.20508 2020 9 25 59117 0.2243 0.3007 -0.20442 2020 9 26 59118 0.2234 0.2992 -0.20372 2020 9 27 59119 0.2224 0.2978 -0.20307 2020 9 28 59120 0.2215 0.2963 -0.20253 2020 9 29 59121 0.2204 0.2949 -0.20214 2020 9 30 59122 0.2194 0.2935 -0.20188 2020 10 1 59123 0.2183 0.2921 -0.20174 2020 10 2 59124 0.2173 0.2907 -0.20168 2020 10 3 59125 0.2161 0.2894 -0.20166 2020 10 4 59126 0.2150 0.2880 -0.20162 2020 10 5 59127 0.2138 0.2867 -0.20153 2020 10 6 59128 0.2126 0.2854 -0.20137 2020 10 7 59129 0.2114 0.2841 -0.20113 2020 10 8 59130 0.2102 0.2828 -0.20083 2020 10 9 59131 0.2089 0.2816 -0.20052 2020 10 10 59132 0.2076 0.2803 -0.20024 2020 10 11 59133 0.2063 0.2791 -0.20007 2020 10 12 59134 0.2049 0.2779 -0.20012 2020 10 13 59135 0.2036 0.2768 -0.20046 2020 10 14 59136 0.2022 0.2756 -0.20113 2020 10 15 59137 0.2007 0.2745 -0.20214 2020 10 16 59138 0.1993 0.2734 -0.20338 2020 10 17 59139 0.1978 0.2723 -0.20470 2020 10 18 59140 0.1964 0.2712 -0.20594 2020 10 19 59141 0.1949 0.2702 -0.20695 2020 10 20 59142 0.1933 0.2692 -0.20769 2020 10 21 59143 0.1918 0.2682 -0.20816 2020 10 22 59144 0.1902 0.2672 -0.20844 2020 10 23 59145 0.1886 0.2663 -0.20865 2020 10 24 59146 0.1870 0.2653 -0.20889 2020 10 25 59147 0.1854 0.2644 -0.20924 2020 10 26 59148 0.1838 0.2636 -0.20973 2020 10 27 59149 0.1821 0.2627 -0.21036 2020 10 28 59150 0.1804 0.2619 -0.21109 2020 10 29 59151 0.1787 0.2611 -0.21193 2020 10 30 59152 0.1770 0.2603 -0.21281 2020 10 31 59153 0.1753 0.2596 -0.21361 2020 11 1 59154 0.1736 0.2589 -0.21428 2020 11 2 59155 0.1718 0.2582 -0.21481 2020 11 3 59156 0.1700 0.2575 -0.21516 2020 11 4 59157 0.1683 0.2569 -0.21540 2020 11 5 59158 0.1665 0.2563 -0.21558 2020 11 6 59159 0.1647 0.2557 -0.21574 2020 11 7 59160 0.1628 0.2551 -0.21603 2020 11 8 59161 0.1610 0.2546 -0.21639 2020 11 9 59162 0.1592 0.2541 -0.21688 2020 11 10 59163 0.1573 0.2536 -0.21759 2020 11 11 59164 0.1554 0.2532 -0.21863 2020 11 12 59165 0.1536 0.2528 -0.21990 2020 11 13 59166 0.1517 0.2524 -0.22131 2020 11 14 59167 0.1498 0.2520 -0.22275 2020 11 15 59168 0.1479 0.2517 -0.22405 2020 11 16 59169 0.1460 0.2514 -0.22509 2020 11 17 59170 0.1441 0.2511 -0.22584 2020 11 18 59171 0.1422 0.2509 -0.22635 2020 11 19 59172 0.1402 0.2507 -0.22672 2020 11 20 59173 0.1383 0.2505 -0.22707 2020 11 21 59174 0.1364 0.2504 -0.22749 2020 11 22 59175 0.1344 0.2503 -0.22800 2020 11 23 59176 0.1325 0.2502 -0.22864 2020 11 24 59177 0.1305 0.2501 -0.22936 2020 11 25 59178 0.1286 0.2501 -0.23016 2020 11 26 59179 0.1266 0.2501 -0.23099 2020 11 27 59180 0.1247 0.2501 -0.23171 2020 11 28 59181 0.1227 0.2502 -0.23233 2020 11 29 59182 0.1208 0.2503 -0.23286 2020 11 30 59183 0.1188 0.2504 -0.23324 2020 12 1 59184 0.1169 0.2505 -0.23342 2020 12 2 59185 0.1150 0.2507 -0.23354 2020 12 3 59186 0.1130 0.2509 -0.23366 2020 12 4 59187 0.1111 0.2512 -0.23374 2020 12 5 59188 0.1091 0.2514 -0.23387 2020 12 6 59189 0.1072 0.2517 -0.23411 2020 12 7 59190 0.1053 0.2521 -0.23453 2020 12 8 59191 0.1033 0.2524 -0.23513 2020 12 9 59192 0.1014 0.2528 -0.23594 2020 12 10 59193 0.0995 0.2533 -0.23695 2020 12 11 59194 0.0976 0.2537 -0.23802 2020 12 12 59195 0.0957 0.2542 -0.23904 2020 12 13 59196 0.0938 0.2547 -0.23986 2020 12 14 59197 0.0920 0.2552 -0.24040 2020 12 15 59198 0.0901 0.2558 -0.24070 2020 12 16 59199 0.0882 0.2564 -0.24085 2020 12 17 59200 0.0864 0.2570 -0.24101 2020 12 18 59201 0.0845 0.2577 -0.24118 2020 12 19 59202 0.0827 0.2584 -0.24144 2020 12 20 59203 0.0809 0.2591 -0.24184 2020 12 21 59204 0.0791 0.2598 -0.24244 2020 12 22 59205 0.0773 0.2606 -0.24316 2020 12 23 59206 0.0755 0.2614 -0.24392 2020 12 24 59207 0.0738 0.2622 -0.24466 2020 12 25 59208 0.0720 0.2631 -0.24534 2020 12 26 59209 0.0703 0.2640 -0.24589 2020 12 27 59210 0.0686 0.2649 -0.24634 2020 12 28 59211 0.0669 0.2658 -0.24669 2020 12 29 59212 0.0652 0.2668 -0.24697 2020 12 30 59213 0.0635 0.2677 -0.24723 2020 12 31 59214 0.0619 0.2688 -0.24747 2021 1 1 59215 0.0603 0.2698 -0.24780 2021 1 2 59216 0.0587 0.2709 -0.24828 2021 1 3 59217 0.0571 0.2720 -0.24893 2021 1 4 59218 0.0555 0.2731 -0.24978 2021 1 5 59219 0.0540 0.2742 -0.25082 2021 1 6 59220 0.0524 0.2754 -0.25196 2021 1 7 59221 0.0509 0.2766 -0.25312 2021 1 8 59222 0.0494 0.2778 -0.25426 2021 1 9 59223 0.0480 0.2790 -0.25524 2021 1 10 59224 0.0465 0.2803 -0.25596 2021 1 11 59225 0.0451 0.2815 -0.25646 2021 1 12 59226 0.0437 0.2828 -0.25678 2021 1 13 59227 0.0424 0.2842 -0.25703 2021 1 14 59228 0.0410 0.2855 -0.25731 2021 1 15 59229 0.0397 0.2869 -0.25771 2021 1 16 59230 0.0384 0.2883 -0.25830 2021 1 17 59231 0.0371 0.2897 -0.25906 2021 1 18 59232 0.0359 0.2911 -0.25991 2021 1 19 59233 0.0347 0.2925 -0.26077 2021 1 20 59234 0.0335 0.2940 -0.26163 2021 1 21 59235 0.0323 0.2955 -0.26245 2021 1 22 59236 0.0312 0.2970 -0.26314 2021 1 23 59237 0.0301 0.2985 -0.26369 2021 1 24 59238 0.0290 0.3001 -0.26411 2021 1 25 59239 0.0280 0.3016 -0.26439 2021 1 26 59240 0.0269 0.3032 -0.26463 2021 1 27 59241 0.0260 0.3048 -0.26486 2021 1 28 59242 0.0250 0.3064 -0.26515 2021 1 29 59243 0.0241 0.3080 -0.26560 2021 1 30 59244 0.0232 0.3096 -0.26626 2021 1 31 59245 0.0223 0.3113 -0.26712 2021 2 1 59246 0.0215 0.3130 -0.26818 2021 2 2 59247 0.0206 0.3146 -0.26939 2021 2 3 59248 0.0199 0.3163 -0.27068 2021 2 4 59249 0.0191 0.3180 -0.27191 2021 2 5 59250 0.0184 0.3198 -0.27306 2021 2 6 59251 0.0177 0.3215 -0.27401 2021 2 7 59252 0.0171 0.3232 -0.27471 2021 2 8 59253 0.0165 0.3250 -0.27522 2021 2 9 59254 0.0159 0.3267 -0.27558 2021 2 10 59255 0.0153 0.3285 -0.27594 2021 2 11 59256 0.0148 0.3303 -0.27642 2021 2 12 59257 0.0143 0.3321 -0.27705 2021 2 13 59258 0.0139 0.3339 -0.27786 2021 2 14 59259 0.0135 0.3357 -0.27880 2021 2 15 59260 0.0131 0.3375 -0.27977 2021 2 16 59261 0.0127 0.3393 -0.28075 2021 2 17 59262 0.0124 0.3411 -0.28166 2021 2 18 59263 0.0122 0.3429 -0.28244 2021 2 19 59264 0.0119 0.3448 -0.28313 2021 2 20 59265 0.0117 0.3466 -0.28375 2021 2 21 59266 0.0115 0.3485 -0.28429 2021 2 22 59267 0.0114 0.3503 -0.28471 2021 2 23 59268 0.0113 0.3521 -0.28504 2021 2 24 59269 0.0112 0.3540 -0.28537 2021 2 25 59270 0.0112 0.3558 -0.28584 2021 2 26 59271 0.0112 0.3577 -0.28652 2021 2 27 59272 0.0112 0.3596 -0.28739 2021 2 28 59273 0.0113 0.3614 -0.28850 2021 3 1 59274 0.0114 0.3633 -0.28976 2021 3 2 59275 0.0115 0.3651 -0.29108 2021 3 3 59276 0.0117 0.3670 -0.29238 2021 3 4 59277 0.0119 0.3688 -0.29354 2021 3 5 59278 0.0122 0.3707 -0.29448 2021 3 6 59279 0.0124 0.3725 -0.29517 2021 3 7 59280 0.0127 0.3743 -0.29573 2021 3 8 59281 0.0131 0.3762 -0.29619 2021 3 9 59282 0.0135 0.3780 -0.29664 2021 3 10 59283 0.0139 0.3798 -0.29716 2021 3 11 59284 0.0144 0.3817 -0.29786 2021 3 12 59285 0.0148 0.3835 -0.29875 2021 3 13 59286 0.0154 0.3853 -0.29976 2021 3 14 59287 0.0159 0.3871 -0.30094 2021 3 15 59288 0.0165 0.3889 -0.30220 2021 3 16 59289 0.0171 0.3907 -0.30347 2021 3 17 59290 0.0178 0.3924 -0.30464 2021 3 18 59291 0.0185 0.3942 -0.30567 2021 3 19 59292 0.0192 0.3960 -0.30654 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) 58908 -107.17 0.51 -7.89 0.07 58909 -107.11 0.53 -7.97 0.06 58910 -107.24 0.53 -8.10 0.06 58911 -107.35 0.67 -8.19 0.03 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 58908 0.218 0.204 -0.018 0.068 58909 0.217 0.212 -0.017 0.065 58910 0.220 0.212 -0.017 0.065 58911 0.224 0.265 -0.019 0.033 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).