********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 12 March 2020 Vol. XXXIII No. 011 ______________________________________________________________________ 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 6 58914 0.02694 .00009 0.36383 .00009 -0.207680 0.000009 20 3 7 58915 0.02762 .00009 0.36566 .00009 -0.208380 0.000009 20 3 8 58916 0.02801 .00009 0.36740 .00009 -0.209252 0.000009 20 3 9 58917 0.02807 .00009 0.36905 .00009 -0.210344 0.000015 20 3 10 58918 0.02823 .00009 0.37067 .00009 -0.211715 0.000018 20 3 11 58919 0.02864 .00009 0.37227 .00009 -0.213254 0.000019 20 3 12 58920 0.02919 .00009 0.37381 .00009 -0.214775 0.000023 _______________________________________________________________________ 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 = 0.1210 - 0.0970 cos A + 0.0047 sin A + 0.0034 cos C + 0.0122 sin C y = 0.3568 + 0.0049 cos A + 0.0861 sin A + 0.0122 cos C - 0.0034 sin C UT1-UTC = -0.2074 - 0.00020 (MJD - 58928) - (UT2-UT1) where A = 2*pi*(MJD-58920)/365.25 and C = 2*pi*(MJD-58920)/435. TAI-UTC(MJD 58921) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58920)**0.80 S t = 0.00025 (MJD-58920)**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 13 58921 0.0298 0.3753 -0.21615 2020 3 14 58922 0.0304 0.3768 -0.21729 2020 3 15 58923 0.0310 0.3784 -0.21817 2020 3 16 58924 0.0316 0.3799 -0.21883 2020 3 17 58925 0.0321 0.3815 -0.21933 2020 3 18 58926 0.0327 0.3831 -0.21974 2020 3 19 58927 0.0333 0.3846 -0.22013 2020 3 20 58928 0.0340 0.3861 -0.22057 2020 3 21 58929 0.0346 0.3877 -0.22110 2020 3 22 58930 0.0353 0.3891 -0.22175 2020 3 23 58931 0.0360 0.3906 -0.22253 2020 3 24 58932 0.0368 0.3921 -0.22342 2020 3 25 58933 0.0375 0.3935 -0.22438 2020 3 26 58934 0.0383 0.3950 -0.22537 2020 3 27 58935 0.0392 0.3964 -0.22635 2020 3 28 58936 0.0400 0.3979 -0.22727 2020 3 29 58937 0.0409 0.3993 -0.22809 2020 3 30 58938 0.0418 0.4007 -0.22879 2020 3 31 58939 0.0427 0.4020 -0.22938 2020 4 1 58940 0.0436 0.4034 -0.22989 2020 4 2 58941 0.0446 0.4047 -0.23039 2020 4 3 58942 0.0456 0.4061 -0.23097 2020 4 4 58943 0.0466 0.4074 -0.23172 2020 4 5 58944 0.0477 0.4087 -0.23268 2020 4 6 58945 0.0487 0.4100 -0.23390 2020 4 7 58946 0.0498 0.4112 -0.23531 2020 4 8 58947 0.0510 0.4125 -0.23681 2020 4 9 58948 0.0521 0.4137 -0.23826 2020 4 10 58949 0.0533 0.4149 -0.23952 2020 4 11 58950 0.0545 0.4161 -0.24052 2020 4 12 58951 0.0557 0.4173 -0.24125 2020 4 13 58952 0.0570 0.4185 -0.24177 2020 4 14 58953 0.0583 0.4196 -0.24218 2020 4 15 58954 0.0596 0.4207 -0.24256 2020 4 16 58955 0.0609 0.4218 -0.24299 2020 4 17 58956 0.0622 0.4229 -0.24352 2020 4 18 58957 0.0636 0.4240 -0.24416 2020 4 19 58958 0.0650 0.4250 -0.24492 2020 4 20 58959 0.0664 0.4260 -0.24579 2020 4 21 58960 0.0678 0.4270 -0.24672 2020 4 22 58961 0.0693 0.4280 -0.24767 2020 4 23 58962 0.0707 0.4290 -0.24857 2020 4 24 58963 0.0722 0.4299 -0.24937 2020 4 25 58964 0.0737 0.4308 -0.25004 2020 4 26 58965 0.0753 0.4317 -0.25055 2020 4 27 58966 0.0768 0.4326 -0.25093 2020 4 28 58967 0.0784 0.4334 -0.25122 2020 4 29 58968 0.0800 0.4342 -0.25146 2020 4 30 58969 0.0816 0.4350 -0.25173 2020 5 1 58970 0.0832 0.4358 -0.25213 2020 5 2 58971 0.0848 0.4366 -0.25272 2020 5 3 58972 0.0864 0.4373 -0.25356 2020 5 4 58973 0.0881 0.4380 -0.25462 2020 5 5 58974 0.0898 0.4386 -0.25583 2020 5 6 58975 0.0915 0.4393 -0.25705 2020 5 7 58976 0.0932 0.4399 -0.25814 2020 5 8 58977 0.0949 0.4405 -0.25900 2020 5 9 58978 0.0966 0.4411 -0.25956 2020 5 10 58979 0.0983 0.4416 -0.25985 2020 5 11 58980 0.1001 0.4421 -0.25996 2020 5 12 58981 0.1018 0.4426 -0.25996 2020 5 13 58982 0.1036 0.4431 -0.25996 2020 5 14 58983 0.1054 0.4435 -0.25999 2020 5 15 58984 0.1072 0.4439 -0.26010 2020 5 16 58985 0.1090 0.4443 -0.26030 2020 5 17 58986 0.1108 0.4446 -0.26058 2020 5 18 58987 0.1126 0.4449 -0.26090 2020 5 19 58988 0.1144 0.4452 -0.26123 2020 5 20 58989 0.1162 0.4455 -0.26153 2020 5 21 58990 0.1181 0.4457 -0.26174 2020 5 22 58991 0.1199 0.4459 -0.26184 2020 5 23 58992 0.1218 0.4461 -0.26179 2020 5 24 58993 0.1236 0.4463 -0.26160 2020 5 25 58994 0.1254 0.4464 -0.26128 2020 5 26 58995 0.1273 0.4465 -0.26090 2020 5 27 58996 0.1292 0.4466 -0.26051 2020 5 28 58997 0.1310 0.4466 -0.26020 2020 5 29 58998 0.1329 0.4466 -0.26004 2020 5 30 58999 0.1347 0.4466 -0.26007 2020 5 31 59000 0.1366 0.4465 -0.26031 2020 6 1 59001 0.1385 0.4465 -0.26071 2020 6 2 59002 0.1403 0.4464 -0.26118 2020 6 3 59003 0.1422 0.4462 -0.26158 2020 6 4 59004 0.1440 0.4461 -0.26182 2020 6 5 59005 0.1459 0.4459 -0.26180 2020 6 6 59006 0.1477 0.4456 -0.26152 2020 6 7 59007 0.1496 0.4454 -0.26103 2020 6 8 59008 0.1514 0.4451 -0.26041 2020 6 9 59009 0.1533 0.4448 -0.25974 2020 6 10 59010 0.1551 0.4445 -0.25909 2020 6 11 59011 0.1569 0.4441 -0.25851 2020 6 12 59012 0.1587 0.4437 -0.25802 2020 6 13 59013 0.1606 0.4433 -0.25760 2020 6 14 59014 0.1624 0.4429 -0.25724 2020 6 15 59015 0.1642 0.4424 -0.25690 2020 6 16 59016 0.1660 0.4419 -0.25655 2020 6 17 59017 0.1677 0.4413 -0.25613 2020 6 18 59018 0.1695 0.4408 -0.25560 2020 6 19 59019 0.1713 0.4402 -0.25494 2020 6 20 59020 0.1730 0.4396 -0.25414 2020 6 21 59021 0.1748 0.4389 -0.25320 2020 6 22 59022 0.1765 0.4383 -0.25218 2020 6 23 59023 0.1782 0.4376 -0.25115 2020 6 24 59024 0.1799 0.4369 -0.25019 2020 6 25 59025 0.1816 0.4361 -0.24938 2020 6 26 59026 0.1833 0.4353 -0.24878 2020 6 27 59027 0.1849 0.4345 -0.24838 2020 6 28 59028 0.1866 0.4337 -0.24816 2020 6 29 59029 0.1882 0.4329 -0.24810 2020 6 30 59030 0.1898 0.4320 -0.24802 2020 7 1 59031 0.1914 0.4311 -0.24781 2020 7 2 59032 0.1930 0.4301 -0.24740 2020 7 3 59033 0.1946 0.4292 -0.24676 2020 7 4 59034 0.1961 0.4282 -0.24592 2020 7 5 59035 0.1976 0.4272 -0.24493 2020 7 6 59036 0.1991 0.4262 -0.24390 2020 7 7 59037 0.2006 0.4251 -0.24290 2020 7 8 59038 0.2021 0.4241 -0.24197 2020 7 9 59039 0.2035 0.4230 -0.24116 2020 7 10 59040 0.2050 0.4219 -0.24045 2020 7 11 59041 0.2064 0.4207 -0.23983 2020 7 12 59042 0.2078 0.4196 -0.23926 2020 7 13 59043 0.2091 0.4184 -0.23869 2020 7 14 59044 0.2105 0.4172 -0.23809 2020 7 15 59045 0.2118 0.4159 -0.23741 2020 7 16 59046 0.2131 0.4147 -0.23663 2020 7 17 59047 0.2143 0.4134 -0.23572 2020 7 18 59048 0.2156 0.4121 -0.23470 2020 7 19 59049 0.2168 0.4108 -0.23359 2020 7 20 59050 0.2180 0.4095 -0.23246 2020 7 21 59051 0.2192 0.4082 -0.23140 2020 7 22 59052 0.2203 0.4068 -0.23050 2020 7 23 59053 0.2215 0.4054 -0.22981 2020 7 24 59054 0.2225 0.4040 -0.22935 2020 7 25 59055 0.2236 0.4026 -0.22909 2020 7 26 59056 0.2247 0.4012 -0.22894 2020 7 27 59057 0.2257 0.3997 -0.22878 2020 7 28 59058 0.2266 0.3983 -0.22852 2020 7 29 59059 0.2276 0.3968 -0.22807 2020 7 30 59060 0.2285 0.3953 -0.22742 2020 7 31 59061 0.2294 0.3938 -0.22657 2020 8 1 59062 0.2303 0.3923 -0.22559 2020 8 2 59063 0.2311 0.3907 -0.22456 2020 8 3 59064 0.2320 0.3892 -0.22355 2020 8 4 59065 0.2327 0.3876 -0.22264 2020 8 5 59066 0.2335 0.3860 -0.22185 2020 8 6 59067 0.2342 0.3844 -0.22119 2020 8 7 59068 0.2349 0.3828 -0.22065 2020 8 8 59069 0.2356 0.3812 -0.22019 2020 8 9 59070 0.2362 0.3796 -0.21976 2020 8 10 59071 0.2368 0.3780 -0.21932 2020 8 11 59072 0.2374 0.3763 -0.21882 2020 8 12 59073 0.2379 0.3747 -0.21824 2020 8 13 59074 0.2384 0.3730 -0.21756 2020 8 14 59075 0.2389 0.3713 -0.21677 2020 8 15 59076 0.2393 0.3697 -0.21591 2020 8 16 59077 0.2397 0.3680 -0.21501 2020 8 17 59078 0.2401 0.3663 -0.21417 2020 8 18 59079 0.2405 0.3646 -0.21346 2020 8 19 59080 0.2408 0.3629 -0.21299 2020 8 20 59081 0.2410 0.3612 -0.21278 2020 8 21 59082 0.2413 0.3595 -0.21283 2020 8 22 59083 0.2415 0.3578 -0.21304 2020 8 23 59084 0.2417 0.3560 -0.21328 2020 8 24 59085 0.2418 0.3543 -0.21343 2020 8 25 59086 0.2419 0.3526 -0.21339 2020 8 26 59087 0.2420 0.3509 -0.21313 2020 8 27 59088 0.2421 0.3491 -0.21266 2020 8 28 59089 0.2421 0.3474 -0.21204 2020 8 29 59090 0.2420 0.3457 -0.21135 2020 8 30 59091 0.2420 0.3439 -0.21068 2020 8 31 59092 0.2419 0.3422 -0.21010 2020 9 1 59093 0.2418 0.3405 -0.20963 2020 9 2 59094 0.2416 0.3387 -0.20931 2020 9 3 59095 0.2414 0.3370 -0.20911 2020 9 4 59096 0.2412 0.3353 -0.20901 2020 9 5 59097 0.2410 0.3336 -0.20895 2020 9 6 59098 0.2407 0.3318 -0.20889 2020 9 7 59099 0.2404 0.3301 -0.20878 2020 9 8 59100 0.2400 0.3284 -0.20857 2020 9 9 59101 0.2396 0.3267 -0.20823 2020 9 10 59102 0.2392 0.3250 -0.20777 2020 9 11 59103 0.2387 0.3233 -0.20719 2020 9 12 59104 0.2383 0.3216 -0.20652 2020 9 13 59105 0.2377 0.3200 -0.20582 2020 9 14 59106 0.2372 0.3183 -0.20518 2020 9 15 59107 0.2366 0.3166 -0.20468 2020 9 16 59108 0.2360 0.3150 -0.20439 2020 9 17 59109 0.2353 0.3133 -0.20434 2020 9 18 59110 0.2347 0.3117 -0.20447 2020 9 19 59111 0.2339 0.3101 -0.20469 2020 9 20 59112 0.2332 0.3085 -0.20486 2020 9 21 59113 0.2324 0.3068 -0.20486 2020 9 22 59114 0.2316 0.3053 -0.20463 2020 9 23 59115 0.2308 0.3037 -0.20418 2020 9 24 59116 0.2299 0.3021 -0.20357 2020 9 25 59117 0.2290 0.3006 -0.20290 2020 9 26 59118 0.2281 0.2990 -0.20227 2020 9 27 59119 0.2271 0.2975 -0.20176 2020 9 28 59120 0.2261 0.2960 -0.20143 2020 9 29 59121 0.2251 0.2945 -0.20130 2020 9 30 59122 0.2241 0.2930 -0.20137 2020 10 1 59123 0.2230 0.2915 -0.20161 2020 10 2 59124 0.2219 0.2901 -0.20199 2020 10 3 59125 0.2208 0.2886 -0.20244 2020 10 4 59126 0.2196 0.2872 -0.20291 2020 10 5 59127 0.2184 0.2858 -0.20334 2020 10 6 59128 0.2172 0.2844 -0.20369 2020 10 7 59129 0.2159 0.2831 -0.20394 2020 10 8 59130 0.2147 0.2817 -0.20410 2020 10 9 59131 0.2134 0.2804 -0.20418 2020 10 10 59132 0.2121 0.2791 -0.20423 2020 10 11 59133 0.2107 0.2778 -0.20435 2020 10 12 59134 0.2093 0.2766 -0.20464 2020 10 13 59135 0.2079 0.2753 -0.20517 2020 10 14 59136 0.2065 0.2741 -0.20601 2020 10 15 59137 0.2051 0.2729 -0.20715 2020 10 16 59138 0.2036 0.2717 -0.20849 2020 10 17 59139 0.2021 0.2706 -0.20987 2020 10 18 59140 0.2006 0.2694 -0.21109 2020 10 19 59141 0.1991 0.2683 -0.21205 2020 10 20 59142 0.1975 0.2672 -0.21270 2020 10 21 59143 0.1959 0.2662 -0.21311 2020 10 22 59144 0.1943 0.2651 -0.21340 2020 10 23 59145 0.1927 0.2641 -0.21366 2020 10 24 59146 0.1910 0.2631 -0.21405 2020 10 25 59147 0.1894 0.2622 -0.21452 2020 10 26 59148 0.1877 0.2612 -0.21504 2020 10 27 59149 0.1860 0.2603 -0.21567 2020 10 28 59150 0.1843 0.2594 -0.21646 2020 10 29 59151 0.1825 0.2586 -0.21732 2020 10 30 59152 0.1808 0.2577 -0.21821 2020 10 31 59153 0.1790 0.2569 -0.21914 2020 11 1 59154 0.1772 0.2562 -0.22002 2020 11 2 59155 0.1754 0.2554 -0.22078 2020 11 3 59156 0.1736 0.2547 -0.22138 2020 11 4 59157 0.1718 0.2540 -0.22184 2020 11 5 59158 0.1699 0.2533 -0.22216 2020 11 6 59159 0.1681 0.2527 -0.22243 2020 11 7 59160 0.1662 0.2521 -0.22271 2020 11 8 59161 0.1643 0.2515 -0.22310 2020 11 9 59162 0.1624 0.2509 -0.22367 2020 11 10 59163 0.1605 0.2504 -0.22448 2020 11 11 59164 0.1586 0.2499 -0.22557 2020 11 12 59165 0.1567 0.2495 -0.22689 2020 11 13 59166 0.1548 0.2490 -0.22826 2020 11 14 59167 0.1528 0.2486 -0.22958 2020 11 15 59168 0.1508 0.2482 -0.23075 2020 11 16 59169 0.1489 0.2479 -0.23165 2020 11 17 59170 0.1469 0.2476 -0.23221 2020 11 18 59171 0.1449 0.2473 -0.23262 2020 11 19 59172 0.1430 0.2470 -0.23299 2020 11 20 59173 0.1410 0.2468 -0.23332 2020 11 21 59174 0.1390 0.2466 -0.23369 2020 11 22 59175 0.1370 0.2465 -0.23414 2020 11 23 59176 0.1350 0.2463 -0.23467 2020 11 24 59177 0.1330 0.2462 -0.23524 2020 11 25 59178 0.1310 0.2462 -0.23587 2020 11 26 59179 0.1290 0.2461 -0.23658 2020 11 27 59180 0.1269 0.2461 -0.23729 2020 11 28 59181 0.1249 0.2462 -0.23796 2020 11 29 59182 0.1229 0.2462 -0.23853 2020 11 30 59183 0.1209 0.2463 -0.23894 2020 12 1 59184 0.1189 0.2464 -0.23919 2020 12 2 59185 0.1169 0.2466 -0.23932 2020 12 3 59186 0.1149 0.2468 -0.23944 2020 12 4 59187 0.1129 0.2470 -0.23951 2020 12 5 59188 0.1109 0.2472 -0.23963 2020 12 6 59189 0.1089 0.2475 -0.23992 2020 12 7 59190 0.1069 0.2478 -0.24051 2020 12 8 59191 0.1049 0.2481 -0.24139 2020 12 9 59192 0.1029 0.2485 -0.24248 2020 12 10 59193 0.1009 0.2489 -0.24372 2020 12 11 59194 0.0990 0.2493 -0.24500 2020 12 12 59195 0.0970 0.2498 -0.24616 2020 12 13 59196 0.0950 0.2503 -0.24715 2020 12 14 59197 0.0931 0.2508 -0.24791 2020 12 15 59198 0.0912 0.2513 -0.24849 2020 12 16 59199 0.0892 0.2519 -0.24898 2020 12 17 59200 0.0873 0.2525 -0.24943 2020 12 18 59201 0.0854 0.2532 -0.24997 2020 12 19 59202 0.0835 0.2538 -0.25062 2020 12 20 59203 0.0816 0.2545 -0.25137 2020 12 21 59204 0.0798 0.2553 -0.25220 2020 12 22 59205 0.0779 0.2560 -0.25308 2020 12 23 59206 0.0761 0.2568 -0.25394 2020 12 24 59207 0.0742 0.2576 -0.25476 2020 12 25 59208 0.0724 0.2585 -0.25555 2020 12 26 59209 0.0706 0.2594 -0.25623 2020 12 27 59210 0.0688 0.2603 -0.25675 2020 12 28 59211 0.0671 0.2612 -0.25712 2020 12 29 59212 0.0653 0.2622 -0.25736 2020 12 30 59213 0.0636 0.2631 -0.25750 2020 12 31 59214 0.0619 0.2642 -0.25761 2021 1 1 59215 0.0602 0.2652 -0.25780 2021 1 2 59216 0.0585 0.2663 -0.25818 2021 1 3 59217 0.0569 0.2673 -0.25878 2021 1 4 59218 0.0552 0.2685 -0.25961 2021 1 5 59219 0.0536 0.2696 -0.26060 2021 1 6 59220 0.0520 0.2708 -0.26173 2021 1 7 59221 0.0504 0.2720 -0.26294 2021 1 8 59222 0.0489 0.2732 -0.26403 2021 1 9 59223 0.0474 0.2744 -0.26495 2021 1 10 59224 0.0459 0.2757 -0.26565 2021 1 11 59225 0.0444 0.2770 -0.26611 2021 1 12 59226 0.0429 0.2783 -0.26645 2021 1 13 59227 0.0415 0.2796 -0.26675 2021 1 14 59228 0.0401 0.2810 -0.26710 2021 1 15 59229 0.0387 0.2824 -0.26758 2021 1 16 59230 0.0374 0.2838 -0.26820 2021 1 17 59231 0.0360 0.2852 -0.26892 2021 1 18 59232 0.0347 0.2867 -0.26970 2021 1 19 59233 0.0334 0.2881 -0.27052 2021 1 20 59234 0.0322 0.2896 -0.27136 2021 1 21 59235 0.0310 0.2911 -0.27214 2021 1 22 59236 0.0298 0.2927 -0.27289 2021 1 23 59237 0.0286 0.2942 -0.27353 2021 1 24 59238 0.0275 0.2958 -0.27401 2021 1 25 59239 0.0264 0.2974 -0.27433 2021 1 26 59240 0.0253 0.2990 -0.27451 2021 1 27 59241 0.0242 0.3006 -0.27464 2021 1 28 59242 0.0232 0.3022 -0.27483 2021 1 29 59243 0.0222 0.3039 -0.27516 2021 1 30 59244 0.0213 0.3055 -0.27572 2021 1 31 59245 0.0204 0.3072 -0.27652 2021 2 1 59246 0.0195 0.3089 -0.27751 2021 2 2 59247 0.0186 0.3106 -0.27864 2021 2 3 59248 0.0178 0.3124 -0.27980 2021 2 4 59249 0.0170 0.3141 -0.28087 2021 2 5 59250 0.0162 0.3159 -0.28180 2021 2 6 59251 0.0155 0.3176 -0.28258 2021 2 7 59252 0.0148 0.3194 -0.28320 2021 2 8 59253 0.0141 0.3212 -0.28362 2021 2 9 59254 0.0135 0.3230 -0.28393 2021 2 10 59255 0.0129 0.3248 -0.28422 2021 2 11 59256 0.0123 0.3266 -0.28465 2021 2 12 59257 0.0118 0.3284 -0.28524 2021 2 13 59258 0.0113 0.3303 -0.28592 2021 2 14 59259 0.0108 0.3321 -0.28669 2021 2 15 59260 0.0104 0.3340 -0.28747 2021 2 16 59261 0.0100 0.3359 -0.28824 2021 2 17 59262 0.0097 0.3377 -0.28898 2021 2 18 59263 0.0093 0.3396 -0.28966 2021 2 19 59264 0.0091 0.3415 -0.29022 2021 2 20 59265 0.0088 0.3434 -0.29064 2021 2 21 59266 0.0086 0.3453 -0.29100 2021 2 22 59267 0.0084 0.3472 -0.29127 2021 2 23 59268 0.0083 0.3491 -0.29150 2021 2 24 59269 0.0082 0.3510 -0.29176 2021 2 25 59270 0.0081 0.3529 -0.29215 2021 2 26 59271 0.0080 0.3548 -0.29279 2021 2 27 59272 0.0080 0.3567 -0.29366 2021 2 28 59273 0.0081 0.3586 -0.29487 2021 3 1 59274 0.0082 0.3605 -0.29634 2021 3 2 59275 0.0083 0.3624 -0.29793 2021 3 3 59276 0.0084 0.3643 -0.29946 2021 3 4 59277 0.0086 0.3662 -0.30082 2021 3 5 59278 0.0088 0.3681 -0.30194 2021 3 6 59279 0.0091 0.3700 -0.30285 2021 3 7 59280 0.0093 0.3719 -0.30359 2021 3 8 59281 0.0097 0.3738 -0.30419 2021 3 9 59282 0.0100 0.3757 -0.30478 2021 3 10 59283 0.0104 0.3776 -0.30546 2021 3 11 59284 0.0109 0.3795 -0.30626 2021 3 12 59285 0.0113 0.3814 -0.30721 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) 58898 -108.06 0.81 -7.43 0.09 58899 -107.75 0.81 -7.50 0.09 58900 -107.38 0.81 -7.64 0.09 58901 -107.13 0.89 -7.76 0.06 58902 -107.09 0.80 -7.75 0.08 58903 -107.20 0.80 -7.64 0.08 58904 -107.36 0.61 -7.54 0.11 58905 -107.46 0.70 -7.56 0.09 58906 -107.41 0.70 -7.68 0.09 58907 -107.20 0.70 -7.79 0.09 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 58898 0.284 0.323 -0.028 0.093 58899 0.295 0.323 -0.024 0.093 58900 0.301 0.323 -0.020 0.093 58901 0.303 0.355 -0.019 0.060 58902 0.300 0.319 -0.020 0.079 58903 0.296 0.319 -0.021 0.079 58904 0.292 0.245 -0.019 0.113 58905 0.292 0.279 -0.013 0.089 58906 0.293 0.279 -0.002 0.089 58907 0.296 0.279 0.011 0.089 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).