********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 9 April 2020 Vol. XXXIII No. 015 ______________________________________________________________________ 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 3 58942 0.05393 .00009 0.40515 .00009 -0.225835 0.000007 20 4 4 58943 0.05488 .00009 0.40676 .00009 -0.226432 0.000013 20 4 5 58944 0.05548 .00009 0.40794 .00009 -0.227324 0.000012 20 4 6 58945 0.05589 .00009 0.40881 .00009 -0.228530 0.000011 20 4 7 58946 0.05625 .00009 0.40941 .00009 -0.230008 0.000011 20 4 8 58947 0.05682 .00009 0.41004 .00009 -0.231629 0.000010 20 4 9 58948 0.05759 .00009 0.41099 .00009 -0.233207 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 = 0.1326 - 0.0887 cos A + 0.0500 sin A + 0.0147 cos C + 0.0120 sin C y = 0.3520 + 0.0468 cos A + 0.0808 sin A + 0.0120 cos C - 0.0147 sin C UT1-UTC = -0.2089 - 0.00017 (MJD - 58956) - (UT2-UT1) where A = 2*pi*(MJD-58948)/365.25 and C = 2*pi*(MJD-58948)/435. TAI-UTC(MJD 58949) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58948)**0.80 S t = 0.00025 (MJD-58948)**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 10 58949 0.0585 0.4121 -0.23459 2020 4 11 58950 0.0595 0.4133 -0.23570 2020 4 12 58951 0.0604 0.4145 -0.23649 2020 4 13 58952 0.0614 0.4157 -0.23703 2020 4 14 58953 0.0624 0.4168 -0.23738 2020 4 15 58954 0.0635 0.4177 -0.23763 2020 4 16 58955 0.0646 0.4186 -0.23786 2020 4 17 58956 0.0658 0.4195 -0.23816 2020 4 18 58957 0.0671 0.4204 -0.23856 2020 4 19 58958 0.0683 0.4213 -0.23909 2020 4 20 58959 0.0696 0.4222 -0.23977 2020 4 21 58960 0.0708 0.4231 -0.24057 2020 4 22 58961 0.0721 0.4240 -0.24142 2020 4 23 58962 0.0733 0.4248 -0.24224 2020 4 24 58963 0.0747 0.4257 -0.24295 2020 4 25 58964 0.0760 0.4265 -0.24352 2020 4 26 58965 0.0775 0.4273 -0.24392 2020 4 27 58966 0.0790 0.4281 -0.24413 2020 4 28 58967 0.0805 0.4289 -0.24420 2020 4 29 58968 0.0820 0.4297 -0.24419 2020 4 30 58969 0.0835 0.4304 -0.24419 2020 5 1 58970 0.0850 0.4311 -0.24430 2020 5 2 58971 0.0866 0.4318 -0.24461 2020 5 3 58972 0.0881 0.4324 -0.24518 2020 5 4 58973 0.0897 0.4331 -0.24601 2020 5 5 58974 0.0913 0.4337 -0.24702 2020 5 6 58975 0.0928 0.4343 -0.24808 2020 5 7 58976 0.0945 0.4349 -0.24904 2020 5 8 58977 0.0961 0.4354 -0.24979 2020 5 9 58978 0.0977 0.4360 -0.25028 2020 5 10 58979 0.0993 0.4365 -0.25054 2020 5 11 58980 0.1010 0.4370 -0.25062 2020 5 12 58981 0.1026 0.4374 -0.25061 2020 5 13 58982 0.1043 0.4378 -0.25060 2020 5 14 58983 0.1060 0.4382 -0.25064 2020 5 15 58984 0.1077 0.4386 -0.25077 2020 5 16 58985 0.1093 0.4389 -0.25099 2020 5 17 58986 0.1110 0.4393 -0.25128 2020 5 18 58987 0.1127 0.4396 -0.25161 2020 5 19 58988 0.1144 0.4398 -0.25195 2020 5 20 58989 0.1161 0.4401 -0.25225 2020 5 21 58990 0.1179 0.4403 -0.25248 2020 5 22 58991 0.1196 0.4405 -0.25259 2020 5 23 58992 0.1213 0.4407 -0.25256 2020 5 24 58993 0.1230 0.4408 -0.25238 2020 5 25 58994 0.1248 0.4409 -0.25209 2020 5 26 58995 0.1265 0.4410 -0.25174 2020 5 27 58996 0.1283 0.4410 -0.25141 2020 5 28 58997 0.1300 0.4411 -0.25118 2020 5 29 58998 0.1317 0.4411 -0.25112 2020 5 30 58999 0.1335 0.4410 -0.25128 2020 5 31 59000 0.1352 0.4410 -0.25167 2020 6 1 59001 0.1370 0.4409 -0.25224 2020 6 2 59002 0.1387 0.4408 -0.25290 2020 6 3 59003 0.1405 0.4406 -0.25349 2020 6 4 59004 0.1422 0.4405 -0.25391 2020 6 5 59005 0.1440 0.4403 -0.25407 2020 6 6 59006 0.1457 0.4400 -0.25397 2020 6 7 59007 0.1474 0.4398 -0.25364 2020 6 8 59008 0.1492 0.4395 -0.25319 2020 6 9 59009 0.1509 0.4392 -0.25270 2020 6 10 59010 0.1526 0.4389 -0.25225 2020 6 11 59011 0.1543 0.4385 -0.25187 2020 6 12 59012 0.1560 0.4381 -0.25160 2020 6 13 59013 0.1578 0.4377 -0.25141 2020 6 14 59014 0.1595 0.4373 -0.25129 2020 6 15 59015 0.1611 0.4368 -0.25119 2020 6 16 59016 0.1628 0.4363 -0.25107 2020 6 17 59017 0.1645 0.4358 -0.25088 2020 6 18 59018 0.1662 0.4353 -0.25058 2020 6 19 59019 0.1678 0.4347 -0.25014 2020 6 20 59020 0.1695 0.4341 -0.24955 2020 6 21 59021 0.1711 0.4335 -0.24883 2020 6 22 59022 0.1727 0.4328 -0.24802 2020 6 23 59023 0.1744 0.4322 -0.24719 2020 6 24 59024 0.1760 0.4315 -0.24643 2020 6 25 59025 0.1776 0.4307 -0.24581 2020 6 26 59026 0.1791 0.4300 -0.24539 2020 6 27 59027 0.1807 0.4292 -0.24517 2020 6 28 59028 0.1823 0.4284 -0.24510 2020 6 29 59029 0.1838 0.4276 -0.24512 2020 6 30 59030 0.1853 0.4267 -0.24511 2020 7 1 59031 0.1868 0.4259 -0.24497 2020 7 2 59032 0.1883 0.4250 -0.24462 2020 7 3 59033 0.1898 0.4241 -0.24404 2020 7 4 59034 0.1912 0.4231 -0.24325 2020 7 5 59035 0.1927 0.4222 -0.24232 2020 7 6 59036 0.1941 0.4212 -0.24134 2020 7 7 59037 0.1955 0.4202 -0.24039 2020 7 8 59038 0.1969 0.4191 -0.23952 2020 7 9 59039 0.1983 0.4181 -0.23875 2020 7 10 59040 0.1996 0.4170 -0.23808 2020 7 11 59041 0.2009 0.4159 -0.23750 2020 7 12 59042 0.2022 0.4148 -0.23695 2020 7 13 59043 0.2035 0.4137 -0.23641 2020 7 14 59044 0.2048 0.4125 -0.23583 2020 7 15 59045 0.2060 0.4113 -0.23517 2020 7 16 59046 0.2072 0.4101 -0.23439 2020 7 17 59047 0.2084 0.4089 -0.23350 2020 7 18 59048 0.2096 0.4077 -0.23248 2020 7 19 59049 0.2108 0.4064 -0.23138 2020 7 20 59050 0.2119 0.4052 -0.23025 2020 7 21 59051 0.2130 0.4039 -0.22918 2020 7 22 59052 0.2141 0.4026 -0.22825 2020 7 23 59053 0.2151 0.4012 -0.22753 2020 7 24 59054 0.2162 0.3999 -0.22704 2020 7 25 59055 0.2172 0.3985 -0.22673 2020 7 26 59056 0.2181 0.3972 -0.22653 2020 7 27 59057 0.2191 0.3958 -0.22637 2020 7 28 59058 0.2200 0.3944 -0.22611 2020 7 29 59059 0.2209 0.3930 -0.22566 2020 7 30 59060 0.2218 0.3915 -0.22500 2020 7 31 59061 0.2226 0.3901 -0.22414 2020 8 1 59062 0.2235 0.3886 -0.22315 2020 8 2 59063 0.2243 0.3872 -0.22210 2020 8 3 59064 0.2250 0.3857 -0.22108 2020 8 4 59065 0.2258 0.3842 -0.22014 2020 8 5 59066 0.2265 0.3827 -0.21932 2020 8 6 59067 0.2271 0.3812 -0.21864 2020 8 7 59068 0.2278 0.3796 -0.21806 2020 8 8 59069 0.2284 0.3781 -0.21755 2020 8 9 59070 0.2290 0.3766 -0.21709 2020 8 10 59071 0.2296 0.3750 -0.21660 2020 8 11 59072 0.2301 0.3734 -0.21607 2020 8 12 59073 0.2306 0.3719 -0.21544 2020 8 13 59074 0.2311 0.3703 -0.21471 2020 8 14 59075 0.2315 0.3687 -0.21388 2020 8 15 59076 0.2319 0.3671 -0.21298 2020 8 16 59077 0.2323 0.3655 -0.21204 2020 8 17 59078 0.2326 0.3639 -0.21116 2020 8 18 59079 0.2330 0.3623 -0.21042 2020 8 19 59080 0.2332 0.3606 -0.20992 2020 8 20 59081 0.2335 0.3590 -0.20968 2020 8 21 59082 0.2337 0.3574 -0.20970 2020 8 22 59083 0.2339 0.3557 -0.20989 2020 8 23 59084 0.2341 0.3541 -0.21012 2020 8 24 59085 0.2342 0.3525 -0.21026 2020 8 25 59086 0.2343 0.3508 -0.21021 2020 8 26 59087 0.2344 0.3492 -0.20994 2020 8 27 59088 0.2344 0.3475 -0.20946 2020 8 28 59089 0.2344 0.3459 -0.20884 2020 8 29 59090 0.2344 0.3443 -0.20816 2020 8 30 59091 0.2343 0.3426 -0.20750 2020 8 31 59092 0.2342 0.3410 -0.20692 2020 9 1 59093 0.2341 0.3393 -0.20647 2020 9 2 59094 0.2339 0.3377 -0.20616 2020 9 3 59095 0.2337 0.3360 -0.20599 2020 9 4 59096 0.2335 0.3344 -0.20591 2020 9 5 59097 0.2333 0.3328 -0.20589 2020 9 6 59098 0.2330 0.3311 -0.20588 2020 9 7 59099 0.2326 0.3295 -0.20582 2020 9 8 59100 0.2323 0.3279 -0.20568 2020 9 9 59101 0.2319 0.3263 -0.20544 2020 9 10 59102 0.2315 0.3247 -0.20511 2020 9 11 59103 0.2311 0.3231 -0.20468 2020 9 12 59104 0.2306 0.3215 -0.20422 2020 9 13 59105 0.2301 0.3199 -0.20378 2020 9 14 59106 0.2295 0.3183 -0.20345 2020 9 15 59107 0.2290 0.3167 -0.20332 2020 9 16 59108 0.2284 0.3152 -0.20347 2020 9 17 59109 0.2278 0.3136 -0.20392 2020 9 18 59110 0.2271 0.3121 -0.20461 2020 9 19 59111 0.2264 0.3105 -0.20541 2020 9 20 59112 0.2257 0.3090 -0.20617 2020 9 21 59113 0.2249 0.3075 -0.20677 2020 9 22 59114 0.2242 0.3060 -0.20712 2020 9 23 59115 0.2233 0.3045 -0.20723 2020 9 24 59116 0.2225 0.3030 -0.20715 2020 9 25 59117 0.2216 0.3016 -0.20698 2020 9 26 59118 0.2207 0.3001 -0.20680 2020 9 27 59119 0.2198 0.2987 -0.20669 2020 9 28 59120 0.2189 0.2973 -0.20669 2020 9 29 59121 0.2179 0.2959 -0.20684 2020 9 30 59122 0.2169 0.2945 -0.20712 2020 10 1 59123 0.2158 0.2931 -0.20751 2020 10 2 59124 0.2148 0.2917 -0.20796 2020 10 3 59125 0.2137 0.2904 -0.20843 2020 10 4 59126 0.2126 0.2891 -0.20886 2020 10 5 59127 0.2114 0.2878 -0.20920 2020 10 6 59128 0.2102 0.2865 -0.20944 2020 10 7 59129 0.2090 0.2852 -0.20955 2020 10 8 59130 0.2078 0.2839 -0.20955 2020 10 9 59131 0.2066 0.2827 -0.20947 2020 10 10 59132 0.2053 0.2815 -0.20936 2020 10 11 59133 0.2040 0.2803 -0.20931 2020 10 12 59134 0.2027 0.2791 -0.20938 2020 10 13 59135 0.2013 0.2779 -0.20966 2020 10 14 59136 0.2000 0.2768 -0.21021 2020 10 15 59137 0.1986 0.2757 -0.21102 2020 10 16 59138 0.1972 0.2746 -0.21199 2020 10 17 59139 0.1957 0.2735 -0.21299 2020 10 18 59140 0.1943 0.2725 -0.21388 2020 10 19 59141 0.1928 0.2715 -0.21454 2020 10 20 59142 0.1913 0.2704 -0.21492 2020 10 21 59143 0.1898 0.2695 -0.21505 2020 10 22 59144 0.1883 0.2685 -0.21502 2020 10 23 59145 0.1867 0.2676 -0.21493 2020 10 24 59146 0.1851 0.2667 -0.21485 2020 10 25 59147 0.1835 0.2658 -0.21485 2020 10 26 59148 0.1819 0.2649 -0.21495 2020 10 27 59149 0.1803 0.2641 -0.21515 2020 10 28 59150 0.1786 0.2633 -0.21543 2020 10 29 59151 0.1770 0.2625 -0.21574 2020 10 30 59152 0.1753 0.2617 -0.21604 2020 10 31 59153 0.1736 0.2610 -0.21628 2020 11 1 59154 0.1719 0.2603 -0.21641 2020 11 2 59155 0.1702 0.2596 -0.21642 2020 11 3 59156 0.1684 0.2590 -0.21631 2020 11 4 59157 0.1667 0.2583 -0.21609 2020 11 5 59158 0.1649 0.2577 -0.21580 2020 11 6 59159 0.1631 0.2572 -0.21550 2020 11 7 59160 0.1613 0.2566 -0.21524 2020 11 8 59161 0.1595 0.2561 -0.21508 2020 11 9 59162 0.1577 0.2556 -0.21508 2020 11 10 59163 0.1559 0.2552 -0.21530 2020 11 11 59164 0.1540 0.2547 -0.21576 2020 11 12 59165 0.1522 0.2543 -0.21645 2020 11 13 59166 0.1503 0.2540 -0.21727 2020 11 14 59167 0.1485 0.2536 -0.21809 2020 11 15 59168 0.1466 0.2533 -0.21876 2020 11 16 59169 0.1447 0.2530 -0.21921 2020 11 17 59170 0.1428 0.2528 -0.21941 2020 11 18 59171 0.1410 0.2525 -0.21946 2020 11 19 59172 0.1391 0.2523 -0.21948 2020 11 20 59173 0.1372 0.2522 -0.21952 2020 11 21 59174 0.1352 0.2520 -0.21959 2020 11 22 59175 0.1333 0.2519 -0.21978 2020 11 23 59176 0.1314 0.2518 -0.22016 2020 11 24 59177 0.1295 0.2518 -0.22066 2020 11 25 59178 0.1276 0.2518 -0.22127 2020 11 26 59179 0.1257 0.2518 -0.22198 2020 11 27 59180 0.1237 0.2518 -0.22265 2020 11 28 59181 0.1218 0.2519 -0.22327 2020 11 29 59182 0.1199 0.2520 -0.22380 2020 11 30 59183 0.1180 0.2521 -0.22417 2020 12 1 59184 0.1160 0.2523 -0.22435 2020 12 2 59185 0.1141 0.2525 -0.22443 2020 12 3 59186 0.1122 0.2527 -0.22440 2020 12 4 59187 0.1103 0.2529 -0.22431 2020 12 5 59188 0.1084 0.2532 -0.22432 2020 12 6 59189 0.1065 0.2535 -0.22450 2020 12 7 59190 0.1046 0.2539 -0.22492 2020 12 8 59191 0.1027 0.2542 -0.22556 2020 12 9 59192 0.1008 0.2546 -0.22643 2020 12 10 59193 0.0989 0.2551 -0.22749 2020 12 11 59194 0.0970 0.2555 -0.22860 2020 12 12 59195 0.0951 0.2560 -0.22956 2020 12 13 59196 0.0933 0.2565 -0.23027 2020 12 14 59197 0.0914 0.2571 -0.23069 2020 12 15 59198 0.0896 0.2576 -0.23085 2020 12 16 59199 0.0877 0.2582 -0.23087 2020 12 17 59200 0.0859 0.2589 -0.23090 2020 12 18 59201 0.0841 0.2595 -0.23100 2020 12 19 59202 0.0823 0.2602 -0.23130 2020 12 20 59203 0.0805 0.2609 -0.23171 2020 12 21 59204 0.0787 0.2617 -0.23215 2020 12 22 59205 0.0770 0.2624 -0.23265 2020 12 23 59206 0.0752 0.2632 -0.23324 2020 12 24 59207 0.0735 0.2641 -0.23381 2020 12 25 59208 0.0717 0.2649 -0.23434 2020 12 26 59209 0.0700 0.2658 -0.23482 2020 12 27 59210 0.0683 0.2667 -0.23520 2020 12 28 59211 0.0667 0.2676 -0.23545 2020 12 29 59212 0.0650 0.2686 -0.23556 2020 12 30 59213 0.0633 0.2696 -0.23556 2020 12 31 59214 0.0617 0.2706 -0.23552 2021 1 1 59215 0.0601 0.2716 -0.23551 2021 1 2 59216 0.0585 0.2727 -0.23565 2021 1 3 59217 0.0569 0.2738 -0.23597 2021 1 4 59218 0.0554 0.2749 -0.23653 2021 1 5 59219 0.0539 0.2760 -0.23728 2021 1 6 59220 0.0523 0.2772 -0.23820 2021 1 7 59221 0.0509 0.2784 -0.23917 2021 1 8 59222 0.0494 0.2796 -0.24000 2021 1 9 59223 0.0479 0.2808 -0.24066 2021 1 10 59224 0.0465 0.2821 -0.24111 2021 1 11 59225 0.0451 0.2833 -0.24135 2021 1 12 59226 0.0437 0.2846 -0.24136 2021 1 13 59227 0.0424 0.2859 -0.24136 2021 1 14 59228 0.0410 0.2873 -0.24148 2021 1 15 59229 0.0397 0.2887 -0.24167 2021 1 16 59230 0.0385 0.2900 -0.24198 2021 1 17 59231 0.0372 0.2914 -0.24238 2021 1 18 59232 0.0360 0.2929 -0.24286 2021 1 19 59233 0.0348 0.2943 -0.24333 2021 1 20 59234 0.0336 0.2958 -0.24380 2021 1 21 59235 0.0324 0.2972 -0.24427 2021 1 22 59236 0.0313 0.2987 -0.24469 2021 1 23 59237 0.0302 0.3002 -0.24502 2021 1 24 59238 0.0291 0.3018 -0.24525 2021 1 25 59239 0.0281 0.3033 -0.24533 2021 1 26 59240 0.0271 0.3049 -0.24530 2021 1 27 59241 0.0261 0.3065 -0.24526 2021 1 28 59242 0.0252 0.3081 -0.24531 2021 1 29 59243 0.0242 0.3097 -0.24546 2021 1 30 59244 0.0233 0.3113 -0.24579 2021 1 31 59245 0.0225 0.3129 -0.24640 2021 2 1 59246 0.0216 0.3146 -0.24732 2021 2 2 59247 0.0208 0.3163 -0.24846 2021 2 3 59248 0.0201 0.3179 -0.24967 2021 2 4 59249 0.0193 0.3196 -0.25083 2021 2 5 59250 0.0186 0.3213 -0.25184 2021 2 6 59251 0.0179 0.3230 -0.25263 2021 2 7 59252 0.0173 0.3248 -0.25324 2021 2 8 59253 0.0167 0.3265 -0.25371 2021 2 9 59254 0.0161 0.3282 -0.25416 2021 2 10 59255 0.0155 0.3300 -0.25469 2021 2 11 59256 0.0150 0.3318 -0.25532 2021 2 12 59257 0.0145 0.3335 -0.25613 2021 2 13 59258 0.0141 0.3353 -0.25712 2021 2 14 59259 0.0137 0.3371 -0.25820 2021 2 15 59260 0.0133 0.3389 -0.25934 2021 2 16 59261 0.0129 0.3407 -0.26048 2021 2 17 59262 0.0126 0.3425 -0.26155 2021 2 18 59263 0.0123 0.3443 -0.26251 2021 2 19 59264 0.0121 0.3461 -0.26339 2021 2 20 59265 0.0119 0.3480 -0.26414 2021 2 21 59266 0.0117 0.3498 -0.26473 2021 2 22 59267 0.0115 0.3516 -0.26522 2021 2 23 59268 0.0114 0.3534 -0.26566 2021 2 24 59269 0.0114 0.3553 -0.26610 2021 2 25 59270 0.0113 0.3571 -0.26665 2021 2 26 59271 0.0113 0.3589 -0.26742 2021 2 27 59272 0.0113 0.3608 -0.26849 2021 2 28 59273 0.0114 0.3626 -0.26986 2021 3 1 59274 0.0115 0.3644 -0.27145 2021 3 2 59275 0.0116 0.3663 -0.27310 2021 3 3 59276 0.0118 0.3681 -0.27472 2021 3 4 59277 0.0120 0.3699 -0.27621 2021 3 5 59278 0.0122 0.3718 -0.27742 2021 3 6 59279 0.0125 0.3736 -0.27838 2021 3 7 59280 0.0128 0.3754 -0.27915 2021 3 8 59281 0.0131 0.3772 -0.27979 2021 3 9 59282 0.0135 0.3790 -0.28046 2021 3 10 59283 0.0139 0.3808 -0.28123 2021 3 11 59284 0.0143 0.3826 -0.28214 2021 3 12 59285 0.0148 0.3844 -0.28324 2021 3 13 59286 0.0153 0.3862 -0.28449 2021 3 14 59287 0.0159 0.3880 -0.28580 2021 3 15 59288 0.0164 0.3897 -0.28711 2021 3 16 59289 0.0170 0.3915 -0.28839 2021 3 17 59290 0.0177 0.3933 -0.28963 2021 3 18 59291 0.0184 0.3950 -0.29074 2021 3 19 59292 0.0191 0.3967 -0.29177 2021 3 20 59293 0.0198 0.3985 -0.29268 2021 3 21 59294 0.0206 0.4002 -0.29343 2021 3 22 59295 0.0214 0.4019 -0.29408 2021 3 23 59296 0.0222 0.4036 -0.29466 2021 3 24 59297 0.0231 0.4052 -0.29528 2021 3 25 59298 0.0240 0.4069 -0.29608 2021 3 26 59299 0.0249 0.4085 -0.29711 2021 3 27 59300 0.0259 0.4102 -0.29846 2021 3 28 59301 0.0269 0.4118 -0.30006 2021 3 29 59302 0.0279 0.4134 -0.30180 2021 3 30 59303 0.0290 0.4150 -0.30354 2021 3 31 59304 0.0301 0.4166 -0.30514 2021 4 1 59305 0.0312 0.4181 -0.30645 2021 4 2 59306 0.0324 0.4197 -0.30751 2021 4 3 59307 0.0335 0.4212 -0.30839 2021 4 4 59308 0.0347 0.4227 -0.30915 2021 4 5 59309 0.0360 0.4242 -0.30982 2021 4 6 59310 0.0372 0.4256 -0.31050 2021 4 7 59311 0.0385 0.4271 -0.31126 2021 4 8 59312 0.0399 0.4285 -0.31219 2021 4 9 59313 0.0412 0.4299 -0.31325 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) 58926 -107.03 0.31 -9.17 0.19 58927 -107.02 0.31 -9.20 0.19 58928 -106.73 0.31 -9.23 0.19 58929 -106.31 0.20 -9.23 0.16 58930 -106.03 0.19 -9.11 0.12 58931 -105.99 0.19 -8.86 0.12 58932 -106.08 0.18 -8.64 0.05 58933 -106.14 0.18 -8.60 0.05 58934 -106.06 0.18 -8.75 0.05 58935 -105.85 0.18 -8.96 0.05 58936 -105.65 0.32 -9.14 0.16 58937 -105.59 0.79 -9.32 0.08 58938 -105.70 0.79 -9.55 0.08 58939 -105.77 0.79 -9.75 0.08 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 58926 0.188 0.122 -0.006 0.194 58927 0.172 0.122 -0.045 0.194 58928 0.163 0.122 -0.081 0.194 58929 0.166 0.078 -0.101 0.160 58930 0.182 0.074 -0.104 0.115 58931 0.204 0.074 -0.096 0.115 58932 0.228 0.072 -0.084 0.051 58933 0.250 0.072 -0.075 0.051 58934 0.268 0.072 -0.069 0.051 58935 0.282 0.072 -0.066 0.051 58936 0.295 0.128 -0.065 0.160 58937 0.306 0.314 -0.066 0.083 58938 0.315 0.314 -0.069 0.083 58939 0.323 0.314 -0.072 0.083 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).