********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 26 March 2020 Vol. XXXIII No. 013 ______________________________________________________________________ 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 20 58928 0.03869 .00009 0.38503 .00009 -0.220254 0.000006 20 3 21 58929 0.04079 .00009 0.38607 .00009 -0.220584 0.000020 20 3 22 58930 0.04256 .00009 0.38722 .00009 -0.220943 0.000021 20 3 23 58931 0.04376 .00009 0.38852 .00009 -0.221363 0.000010 20 3 24 58932 0.04448 .00009 0.38994 .00009 -0.221919 0.000011 20 3 25 58933 0.04475 .00009 0.39144 .00009 -0.222480 0.000011 20 3 26 58934 0.04455 .00009 0.39298 .00009 -0.223043 0.000011 _______________________________________________________________________ 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 = 0.1320 - 0.0960 cos A + 0.0257 sin A + 0.0084 cos C + 0.0146 sin C y = 0.3541 + 0.0245 cos A + 0.0862 sin A + 0.0146 cos C - 0.0084 sin C UT1-UTC = -0.2043 - 0.00018 (MJD - 58942) - (UT2-UT1) where A = 2*pi*(MJD-58934)/365.25 and C = 2*pi*(MJD-58934)/435. TAI-UTC(MJD 58935) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58934)**0.80 S t = 0.00025 (MJD-58934)**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 27 58935 0.0445 0.3942 -0.22361 2020 3 28 58936 0.0446 0.3954 -0.22413 2020 3 29 58937 0.0451 0.3965 -0.22453 2020 3 30 58938 0.0458 0.3975 -0.22482 2020 3 31 58939 0.0467 0.3986 -0.22505 2020 4 1 58940 0.0475 0.3999 -0.22526 2020 4 2 58941 0.0483 0.4012 -0.22551 2020 4 3 58942 0.0491 0.4026 -0.22585 2020 4 4 58943 0.0498 0.4039 -0.22636 2020 4 5 58944 0.0505 0.4052 -0.22708 2020 4 6 58945 0.0513 0.4063 -0.22802 2020 4 7 58946 0.0522 0.4075 -0.22916 2020 4 8 58947 0.0532 0.4086 -0.23038 2020 4 9 58948 0.0541 0.4098 -0.23154 2020 4 10 58949 0.0551 0.4110 -0.23252 2020 4 11 58950 0.0562 0.4122 -0.23328 2020 4 12 58951 0.0573 0.4135 -0.23383 2020 4 13 58952 0.0584 0.4146 -0.23420 2020 4 14 58953 0.0596 0.4157 -0.23447 2020 4 15 58954 0.0608 0.4168 -0.23473 2020 4 16 58955 0.0620 0.4178 -0.23504 2020 4 17 58956 0.0633 0.4188 -0.23545 2020 4 18 58957 0.0646 0.4199 -0.23598 2020 4 19 58958 0.0660 0.4209 -0.23663 2020 4 20 58959 0.0673 0.4219 -0.23738 2020 4 21 58960 0.0687 0.4229 -0.23819 2020 4 22 58961 0.0700 0.4239 -0.23902 2020 4 23 58962 0.0714 0.4248 -0.23982 2020 4 24 58963 0.0728 0.4257 -0.24054 2020 4 25 58964 0.0743 0.4266 -0.24114 2020 4 26 58965 0.0757 0.4275 -0.24159 2020 4 27 58966 0.0772 0.4284 -0.24189 2020 4 28 58967 0.0787 0.4292 -0.24208 2020 4 29 58968 0.0802 0.4300 -0.24222 2020 4 30 58969 0.0818 0.4308 -0.24239 2020 5 1 58970 0.0833 0.4316 -0.24266 2020 5 2 58971 0.0848 0.4323 -0.24314 2020 5 3 58972 0.0864 0.4330 -0.24386 2020 5 4 58973 0.0880 0.4337 -0.24482 2020 5 5 58974 0.0896 0.4344 -0.24595 2020 5 6 58975 0.0912 0.4350 -0.24713 2020 5 7 58976 0.0928 0.4357 -0.24821 2020 5 8 58977 0.0944 0.4363 -0.24908 2020 5 9 58978 0.0961 0.4368 -0.24969 2020 5 10 58979 0.0977 0.4374 -0.25007 2020 5 11 58980 0.0994 0.4379 -0.25028 2020 5 12 58981 0.1011 0.4384 -0.25040 2020 5 13 58982 0.1028 0.4389 -0.25051 2020 5 14 58983 0.1045 0.4393 -0.25066 2020 5 15 58984 0.1062 0.4397 -0.25088 2020 5 16 58985 0.1079 0.4401 -0.25118 2020 5 17 58986 0.1096 0.4405 -0.25154 2020 5 18 58987 0.1113 0.4408 -0.25196 2020 5 19 58988 0.1131 0.4411 -0.25239 2020 5 20 58989 0.1148 0.4414 -0.25280 2020 5 21 58990 0.1166 0.4417 -0.25314 2020 5 22 58991 0.1183 0.4419 -0.25336 2020 5 23 58992 0.1201 0.4421 -0.25344 2020 5 24 58993 0.1219 0.4423 -0.25338 2020 5 25 58994 0.1236 0.4424 -0.25318 2020 5 26 58995 0.1254 0.4425 -0.25292 2020 5 27 58996 0.1272 0.4426 -0.25264 2020 5 28 58997 0.1290 0.4427 -0.25243 2020 5 29 58998 0.1308 0.4427 -0.25236 2020 5 30 58999 0.1326 0.4427 -0.25250 2020 5 31 59000 0.1343 0.4427 -0.25283 2020 6 1 59001 0.1361 0.4426 -0.25333 2020 6 2 59002 0.1379 0.4426 -0.25389 2020 6 3 59003 0.1397 0.4425 -0.25439 2020 6 4 59004 0.1415 0.4423 -0.25472 2020 6 5 59005 0.1433 0.4422 -0.25480 2020 6 6 59006 0.1451 0.4420 -0.25461 2020 6 7 59007 0.1469 0.4418 -0.25421 2020 6 8 59008 0.1486 0.4415 -0.25368 2020 6 9 59009 0.1504 0.4413 -0.25311 2020 6 10 59010 0.1522 0.4410 -0.25256 2020 6 11 59011 0.1539 0.4406 -0.25209 2020 6 12 59012 0.1557 0.4403 -0.25170 2020 6 13 59013 0.1575 0.4399 -0.25141 2020 6 14 59014 0.1592 0.4395 -0.25118 2020 6 15 59015 0.1609 0.4391 -0.25097 2020 6 16 59016 0.1627 0.4386 -0.25075 2020 6 17 59017 0.1644 0.4381 -0.25046 2020 6 18 59018 0.1661 0.4376 -0.25007 2020 6 19 59019 0.1678 0.4370 -0.24954 2020 6 20 59020 0.1695 0.4365 -0.24887 2020 6 21 59021 0.1712 0.4359 -0.24806 2020 6 22 59022 0.1729 0.4353 -0.24716 2020 6 23 59023 0.1746 0.4346 -0.24625 2020 6 24 59024 0.1762 0.4339 -0.24540 2020 6 25 59025 0.1779 0.4332 -0.24469 2020 6 26 59026 0.1795 0.4325 -0.24418 2020 6 27 59027 0.1811 0.4318 -0.24388 2020 6 28 59028 0.1827 0.4310 -0.24373 2020 6 29 59029 0.1843 0.4302 -0.24366 2020 6 30 59030 0.1859 0.4294 -0.24356 2020 7 1 59031 0.1874 0.4285 -0.24333 2020 7 2 59032 0.1890 0.4276 -0.24288 2020 7 3 59033 0.1905 0.4267 -0.24220 2020 7 4 59034 0.1920 0.4258 -0.24130 2020 7 5 59035 0.1935 0.4249 -0.24025 2020 7 6 59036 0.1949 0.4239 -0.23915 2020 7 7 59037 0.1964 0.4229 -0.23808 2020 7 8 59038 0.1978 0.4219 -0.23708 2020 7 9 59039 0.1993 0.4208 -0.23619 2020 7 10 59040 0.2007 0.4198 -0.23539 2020 7 11 59041 0.2020 0.4187 -0.23468 2020 7 12 59042 0.2034 0.4176 -0.23402 2020 7 13 59043 0.2047 0.4165 -0.23344 2020 7 14 59044 0.2061 0.4153 -0.23282 2020 7 15 59045 0.2073 0.4141 -0.23212 2020 7 16 59046 0.2086 0.4130 -0.23132 2020 7 17 59047 0.2099 0.4117 -0.23039 2020 7 18 59048 0.2111 0.4105 -0.22935 2020 7 19 59049 0.2123 0.4093 -0.22823 2020 7 20 59050 0.2135 0.4080 -0.22709 2020 7 21 59051 0.2146 0.4067 -0.22602 2020 7 22 59052 0.2158 0.4054 -0.22510 2020 7 23 59053 0.2169 0.4041 -0.22440 2020 7 24 59054 0.2180 0.4028 -0.22394 2020 7 25 59055 0.2190 0.4014 -0.22368 2020 7 26 59056 0.2200 0.4000 -0.22352 2020 7 27 59057 0.2210 0.3986 -0.22335 2020 7 28 59058 0.2220 0.3972 -0.22309 2020 7 29 59059 0.2230 0.3958 -0.22263 2020 7 30 59060 0.2239 0.3944 -0.22197 2020 7 31 59061 0.2248 0.3929 -0.22111 2020 8 1 59062 0.2257 0.3915 -0.22012 2020 8 2 59063 0.2265 0.3900 -0.21908 2020 8 3 59064 0.2273 0.3885 -0.21806 2020 8 4 59065 0.2281 0.3870 -0.21713 2020 8 5 59066 0.2289 0.3855 -0.21632 2020 8 6 59067 0.2296 0.3839 -0.21565 2020 8 7 59068 0.2303 0.3824 -0.21509 2020 8 8 59069 0.2309 0.3809 -0.21460 2020 8 9 59070 0.2316 0.3793 -0.21415 2020 8 10 59071 0.2322 0.3777 -0.21369 2020 8 11 59072 0.2328 0.3761 -0.21317 2020 8 12 59073 0.2333 0.3745 -0.21256 2020 8 13 59074 0.2338 0.3729 -0.21185 2020 8 14 59075 0.2343 0.3713 -0.21104 2020 8 15 59076 0.2348 0.3697 -0.21015 2020 8 16 59077 0.2352 0.3681 -0.20923 2020 8 17 59078 0.2356 0.3665 -0.20836 2020 8 18 59079 0.2359 0.3648 -0.20764 2020 8 19 59080 0.2363 0.3632 -0.20714 2020 8 20 59081 0.2365 0.3615 -0.20692 2020 8 21 59082 0.2368 0.3599 -0.20695 2020 8 22 59083 0.2370 0.3582 -0.20714 2020 8 23 59084 0.2372 0.3566 -0.20737 2020 8 24 59085 0.2374 0.3549 -0.20752 2020 8 25 59086 0.2375 0.3532 -0.20747 2020 8 26 59087 0.2376 0.3516 -0.20721 2020 8 27 59088 0.2377 0.3499 -0.20674 2020 8 28 59089 0.2378 0.3482 -0.20613 2020 8 29 59090 0.2378 0.3465 -0.20546 2020 8 30 59091 0.2377 0.3449 -0.20481 2020 8 31 59092 0.2377 0.3432 -0.20425 2020 9 1 59093 0.2376 0.3415 -0.20381 2020 9 2 59094 0.2375 0.3398 -0.20353 2020 9 3 59095 0.2373 0.3382 -0.20337 2020 9 4 59096 0.2371 0.3365 -0.20331 2020 9 5 59097 0.2369 0.3348 -0.20331 2020 9 6 59098 0.2366 0.3332 -0.20332 2020 9 7 59099 0.2363 0.3315 -0.20328 2020 9 8 59100 0.2360 0.3298 -0.20317 2020 9 9 59101 0.2357 0.3282 -0.20295 2020 9 10 59102 0.2353 0.3266 -0.20264 2020 9 11 59103 0.2349 0.3249 -0.20224 2020 9 12 59104 0.2344 0.3233 -0.20179 2020 9 13 59105 0.2339 0.3216 -0.20137 2020 9 14 59106 0.2334 0.3200 -0.20106 2020 9 15 59107 0.2329 0.3184 -0.20094 2020 9 16 59108 0.2323 0.3168 -0.20110 2020 9 17 59109 0.2317 0.3152 -0.20155 2020 9 18 59110 0.2311 0.3136 -0.20223 2020 9 19 59111 0.2304 0.3120 -0.20302 2020 9 20 59112 0.2297 0.3105 -0.20376 2020 9 21 59113 0.2290 0.3089 -0.20431 2020 9 22 59114 0.2282 0.3074 -0.20461 2020 9 23 59115 0.2274 0.3058 -0.20465 2020 9 24 59116 0.2266 0.3043 -0.20448 2020 9 25 59117 0.2257 0.3028 -0.20418 2020 9 26 59118 0.2249 0.3013 -0.20384 2020 9 27 59119 0.2240 0.2998 -0.20354 2020 9 28 59120 0.2230 0.2983 -0.20332 2020 9 29 59121 0.2220 0.2969 -0.20319 2020 9 30 59122 0.2210 0.2954 -0.20314 2020 10 1 59123 0.2200 0.2940 -0.20317 2020 10 2 59124 0.2190 0.2926 -0.20322 2020 10 3 59125 0.2179 0.2912 -0.20326 2020 10 4 59126 0.2168 0.2898 -0.20325 2020 10 5 59127 0.2156 0.2885 -0.20315 2020 10 6 59128 0.2145 0.2871 -0.20295 2020 10 7 59129 0.2133 0.2858 -0.20262 2020 10 8 59130 0.2121 0.2845 -0.20219 2020 10 9 59131 0.2108 0.2832 -0.20170 2020 10 10 59132 0.2096 0.2819 -0.20119 2020 10 11 59133 0.2083 0.2807 -0.20074 2020 10 12 59134 0.2069 0.2794 -0.20045 2020 10 13 59135 0.2056 0.2782 -0.20041 2020 10 14 59136 0.2042 0.2770 -0.20067 2020 10 15 59137 0.2028 0.2759 -0.20123 2020 10 16 59138 0.2014 0.2747 -0.20201 2020 10 17 59139 0.2000 0.2736 -0.20287 2020 10 18 59140 0.1985 0.2725 -0.20363 2020 10 19 59141 0.1971 0.2714 -0.20419 2020 10 20 59142 0.1956 0.2703 -0.20449 2020 10 21 59143 0.1940 0.2693 -0.20459 2020 10 22 59144 0.1925 0.2683 -0.20457 2020 10 23 59145 0.1909 0.2673 -0.20453 2020 10 24 59146 0.1893 0.2663 -0.20458 2020 10 25 59147 0.1877 0.2654 -0.20476 2020 10 26 59148 0.1861 0.2645 -0.20509 2020 10 27 59149 0.1845 0.2636 -0.20559 2020 10 28 59150 0.1828 0.2627 -0.20623 2020 10 29 59151 0.1811 0.2619 -0.20698 2020 10 30 59152 0.1794 0.2611 -0.20778 2020 10 31 59153 0.1777 0.2603 -0.20858 2020 11 1 59154 0.1760 0.2595 -0.20930 2020 11 2 59155 0.1742 0.2588 -0.20991 2020 11 3 59156 0.1725 0.2581 -0.21034 2020 11 4 59157 0.1707 0.2574 -0.21065 2020 11 5 59158 0.1689 0.2567 -0.21082 2020 11 6 59159 0.1671 0.2561 -0.21090 2020 11 7 59160 0.1653 0.2555 -0.21103 2020 11 8 59161 0.1635 0.2549 -0.21128 2020 11 9 59162 0.1616 0.2544 -0.21174 2020 11 10 59163 0.1598 0.2539 -0.21245 2020 11 11 59164 0.1579 0.2534 -0.21343 2020 11 12 59165 0.1561 0.2529 -0.21468 2020 11 13 59166 0.1542 0.2525 -0.21608 2020 11 14 59167 0.1523 0.2521 -0.21739 2020 11 15 59168 0.1504 0.2517 -0.21849 2020 11 16 59169 0.1485 0.2514 -0.21929 2020 11 17 59170 0.1466 0.2511 -0.21979 2020 11 18 59171 0.1446 0.2508 -0.22008 2020 11 19 59172 0.1427 0.2505 -0.22032 2020 11 20 59173 0.1408 0.2503 -0.22056 2020 11 21 59174 0.1388 0.2501 -0.22097 2020 11 22 59175 0.1369 0.2500 -0.22147 2020 11 23 59176 0.1349 0.2498 -0.22202 2020 11 24 59177 0.1330 0.2497 -0.22264 2020 11 25 59178 0.1310 0.2496 -0.22339 2020 11 26 59179 0.1291 0.2496 -0.22416 2020 11 27 59180 0.1271 0.2496 -0.22492 2020 11 28 59181 0.1252 0.2496 -0.22567 2020 11 29 59182 0.1232 0.2497 -0.22633 2020 11 30 59183 0.1212 0.2497 -0.22686 2020 12 1 59184 0.1193 0.2499 -0.22722 2020 12 2 59185 0.1173 0.2500 -0.22745 2020 12 3 59186 0.1154 0.2502 -0.22757 2020 12 4 59187 0.1134 0.2504 -0.22767 2020 12 5 59188 0.1114 0.2506 -0.22784 2020 12 6 59189 0.1095 0.2509 -0.22815 2020 12 7 59190 0.1075 0.2512 -0.22867 2020 12 8 59191 0.1056 0.2515 -0.22942 2020 12 9 59192 0.1037 0.2518 -0.23040 2020 12 10 59193 0.1017 0.2522 -0.23153 2020 12 11 59194 0.0998 0.2526 -0.23261 2020 12 12 59195 0.0979 0.2531 -0.23358 2020 12 13 59196 0.0960 0.2535 -0.23436 2020 12 14 59197 0.0941 0.2540 -0.23488 2020 12 15 59198 0.0922 0.2546 -0.23511 2020 12 16 59199 0.0903 0.2551 -0.23524 2020 12 17 59200 0.0884 0.2557 -0.23541 2020 12 18 59201 0.0866 0.2564 -0.23559 2020 12 19 59202 0.0847 0.2570 -0.23585 2020 12 20 59203 0.0829 0.2577 -0.23620 2020 12 21 59204 0.0810 0.2584 -0.23663 2020 12 22 59205 0.0792 0.2591 -0.23708 2020 12 23 59206 0.0774 0.2599 -0.23755 2020 12 24 59207 0.0756 0.2607 -0.23806 2020 12 25 59208 0.0738 0.2615 -0.23853 2020 12 26 59209 0.0721 0.2624 -0.23894 2020 12 27 59210 0.0703 0.2632 -0.23923 2020 12 28 59211 0.0686 0.2641 -0.23937 2020 12 29 59212 0.0669 0.2651 -0.23936 2020 12 30 59213 0.0652 0.2660 -0.23927 2020 12 31 59214 0.0635 0.2670 -0.23922 2021 1 1 59215 0.0618 0.2680 -0.23918 2021 1 2 59216 0.0602 0.2690 -0.23927 2021 1 3 59217 0.0586 0.2701 -0.23958 2021 1 4 59218 0.0570 0.2712 -0.24020 2021 1 5 59219 0.0554 0.2723 -0.24108 2021 1 6 59220 0.0538 0.2734 -0.24211 2021 1 7 59221 0.0523 0.2746 -0.24319 2021 1 8 59222 0.0507 0.2758 -0.24422 2021 1 9 59223 0.0492 0.2770 -0.24506 2021 1 10 59224 0.0478 0.2782 -0.24573 2021 1 11 59225 0.0463 0.2795 -0.24620 2021 1 12 59226 0.0449 0.2808 -0.24657 2021 1 13 59227 0.0435 0.2821 -0.24694 2021 1 14 59228 0.0421 0.2834 -0.24734 2021 1 15 59229 0.0407 0.2848 -0.24788 2021 1 16 59230 0.0394 0.2861 -0.24858 2021 1 17 59231 0.0381 0.2875 -0.24938 2021 1 18 59232 0.0368 0.2889 -0.25026 2021 1 19 59233 0.0355 0.2903 -0.25117 2021 1 20 59234 0.0343 0.2918 -0.25202 2021 1 21 59235 0.0331 0.2933 -0.25281 2021 1 22 59236 0.0319 0.2948 -0.25354 2021 1 23 59237 0.0307 0.2963 -0.25415 2021 1 24 59238 0.0296 0.2978 -0.25459 2021 1 25 59239 0.0285 0.2993 -0.25491 2021 1 26 59240 0.0275 0.3009 -0.25514 2021 1 27 59241 0.0264 0.3025 -0.25531 2021 1 28 59242 0.0254 0.3041 -0.25553 2021 1 29 59243 0.0244 0.3057 -0.25590 2021 1 30 59244 0.0235 0.3073 -0.25652 2021 1 31 59245 0.0226 0.3090 -0.25743 2021 2 1 59246 0.0217 0.3106 -0.25856 2021 2 2 59247 0.0208 0.3123 -0.25981 2021 2 3 59248 0.0200 0.3140 -0.26112 2021 2 4 59249 0.0192 0.3157 -0.26241 2021 2 5 59250 0.0184 0.3174 -0.26348 2021 2 6 59251 0.0177 0.3191 -0.26434 2021 2 7 59252 0.0170 0.3208 -0.26499 2021 2 8 59253 0.0164 0.3226 -0.26545 2021 2 9 59254 0.0157 0.3243 -0.26587 2021 2 10 59255 0.0151 0.3261 -0.26633 2021 2 11 59256 0.0146 0.3279 -0.26691 2021 2 12 59257 0.0140 0.3297 -0.26766 2021 2 13 59258 0.0135 0.3315 -0.26857 2021 2 14 59259 0.0131 0.3333 -0.26957 2021 2 15 59260 0.0126 0.3351 -0.27061 2021 2 16 59261 0.0122 0.3369 -0.27167 2021 2 17 59262 0.0119 0.3387 -0.27271 2021 2 18 59263 0.0115 0.3406 -0.27366 2021 2 19 59264 0.0112 0.3424 -0.27457 2021 2 20 59265 0.0110 0.3442 -0.27536 2021 2 21 59266 0.0108 0.3461 -0.27598 2021 2 22 59267 0.0106 0.3479 -0.27647 2021 2 23 59268 0.0104 0.3498 -0.27686 2021 2 24 59269 0.0103 0.3517 -0.27726 2021 2 25 59270 0.0102 0.3535 -0.27778 2021 2 26 59271 0.0102 0.3554 -0.27850 2021 2 27 59272 0.0102 0.3572 -0.27951 2021 2 28 59273 0.0102 0.3591 -0.28078 2021 3 1 59274 0.0102 0.3610 -0.28223 2021 3 2 59275 0.0103 0.3628 -0.28376 2021 3 3 59276 0.0104 0.3647 -0.28523 2021 3 4 59277 0.0106 0.3666 -0.28650 2021 3 5 59278 0.0108 0.3684 -0.28756 2021 3 6 59279 0.0110 0.3703 -0.28845 2021 3 7 59280 0.0113 0.3721 -0.28919 2021 3 8 59281 0.0116 0.3740 -0.28979 2021 3 9 59282 0.0119 0.3758 -0.29034 2021 3 10 59283 0.0123 0.3777 -0.29094 2021 3 11 59284 0.0127 0.3795 -0.29172 2021 3 12 59285 0.0132 0.3814 -0.29265 2021 3 13 59286 0.0136 0.3832 -0.29367 2021 3 14 59287 0.0142 0.3850 -0.29474 2021 3 15 59288 0.0147 0.3868 -0.29580 2021 3 16 59289 0.0153 0.3886 -0.29680 2021 3 17 59290 0.0159 0.3904 -0.29773 2021 3 18 59291 0.0166 0.3922 -0.29856 2021 3 19 59292 0.0172 0.3940 -0.29925 2021 3 20 59293 0.0180 0.3958 -0.29980 2021 3 21 59294 0.0187 0.3975 -0.30029 2021 3 22 59295 0.0195 0.3993 -0.30071 2021 3 23 59296 0.0203 0.4010 -0.30113 2021 3 24 59297 0.0212 0.4027 -0.30161 2021 3 25 59298 0.0220 0.4044 -0.30228 2021 3 26 59299 0.0230 0.4061 -0.30323 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) 58912 -107.40 0.54 -8.16 0.07 58913 -107.50 0.54 -8.17 0.07 58914 -107.83 0.54 -8.44 0.07 58915 -108.01 0.49 -8.95 0.08 58916 -107.57 0.45 -9.32 0.13 58917 -106.65 0.45 -9.26 0.13 58918 -105.98 0.39 -8.91 0.17 58919 -106.01 0.39 -8.64 0.17 58920 -106.52 0.39 -8.63 0.17 58921 -106.99 0.39 -8.71 0.17 58922 -107.13 0.32 -8.76 0.16 58923 -106.99 0.65 -8.82 0.06 58924 -106.82 0.65 -8.96 0.06 58925 -106.80 0.65 -9.08 0.06 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 58912 0.205 0.216 -0.017 0.066 58913 0.204 0.216 -0.030 0.066 58914 0.199 0.216 -0.046 0.066 58915 0.191 0.193 -0.065 0.078 58916 0.180 0.177 -0.085 0.132 58917 0.170 0.177 -0.101 0.132 58918 0.163 0.155 -0.111 0.173 58919 0.162 0.155 -0.112 0.173 58920 0.166 0.155 -0.104 0.173 58921 0.175 0.155 -0.087 0.173 58922 0.188 0.128 -0.064 0.160 58923 0.203 0.259 -0.037 0.064 58924 0.221 0.259 -0.006 0.064 58925 0.239 0.259 0.027 0.064 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).