********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 3 September 2020 Vol. XXXIII No. 036 ______________________________________________________________________ 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 *********************************************************************** * * * There will NOT be a leap second introduced * * in UTC on 31 December 2020 * * * * 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 no earlier * * than Autumn of 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 * * contact the USNO PAO Geoff Chester at email address directly * * 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. * * * * Until 31 Oct 2020, 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. * * * * Please note that CDDIS is reporting that as of 31 Oct 2020, all * * unencrypted ftp service will be permanently discontinued at CDDIS. * * * * 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 8 28 59089 0.21837 .00009 0.36387 .00009 -0.190110 0.000021 20 8 29 59090 0.21806 .00009 0.36311 .00009 -0.188886 0.000020 20 8 30 59091 0.21748 .00009 0.36235 .00009 -0.187609 0.000019 20 8 31 59092 0.21674 .00009 0.36153 .00009 -0.186391 0.000015 20 9 1 59093 0.21583 .00009 0.36061 .00009 -0.185342 0.000015 20 9 2 59094 0.21488 .00009 0.35936 .00009 -0.184447 0.000012 20 9 3 59095 0.21398 .00009 0.35791 .00009 -0.183692 0.000055 IERS Final Values MJD x y UT1-UTC " " s 20 7 2 59032 0.1686 0.4310 -0.23949 20 7 3 59033 0.1700 0.4301 -0.23860 20 7 4 59034 0.1716 0.4289 -0.23750 20 7 5 59035 0.1734 0.4274 -0.23622 20 7 6 59036 0.1756 0.4261 -0.23489 20 7 7 59037 0.1777 0.4248 -0.23361 20 7 8 59038 0.1796 0.4234 -0.23241 20 7 9 59039 0.1815 0.4219 -0.23129 20 7 10 59040 0.1834 0.4204 -0.23022 20 7 11 59041 0.1852 0.4194 -0.22925 20 7 12 59042 0.1867 0.4182 -0.22825 20 7 13 59043 0.1876 0.4170 -0.22720 20 7 14 59044 0.1884 0.4157 -0.22612 20 7 15 59045 0.1897 0.4147 -0.22499 20 7 16 59046 0.1909 0.4139 -0.22378 20 7 17 59047 0.1922 0.4129 -0.22248 20 7 18 59048 0.1933 0.4119 -0.22111 20 7 19 59049 0.1939 0.4108 -0.21969 20 7 20 59050 0.1944 0.4095 -0.21824 20 7 21 59051 0.1947 0.4082 -0.21686 20 7 22 59052 0.1951 0.4067 -0.21567 20 7 23 59053 0.1955 0.4052 -0.21471 20 7 24 59054 0.1964 0.4040 -0.21398 20 7 25 59055 0.1972 0.4028 -0.21344 20 7 26 59056 0.1978 0.4017 -0.21298 20 7 27 59057 0.1981 0.4005 -0.21247 20 7 28 59058 0.1981 0.3993 -0.21184 20 7 29 59059 0.1986 0.3982 -0.21108 20 7 30 59060 0.1992 0.3971 -0.21018 20 7 31 59061 0.1999 0.3960 -0.20917 20 8 1 59062 0.2009 0.3948 -0.20812 _______________________________________________________________________ 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 = 0.1219 + 0.0848 cos A - 0.0038 sin A + 0.0063 cos C + 0.0024 sin C y = 0.3609 - 0.0047 cos A - 0.0801 sin A + 0.0024 cos C - 0.0063 sin C UT1-UTC = -0.1964 - 0.00007 (MJD - 59103) - (UT2-UT1) where A = 2*pi*(MJD-59095)/365.25 and C = 2*pi*(MJD-59095)/435. TAI-UTC(MJD 59096) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59095)**0.80 S t = 0.00025 (MJD-59095)**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 9 4 59096 0.2133 0.3564 -0.18306 2020 9 5 59097 0.2128 0.3548 -0.18250 2020 9 6 59098 0.2124 0.3534 -0.18195 2020 9 7 59099 0.2121 0.3520 -0.18135 2020 9 8 59100 0.2118 0.3506 -0.18068 2020 9 9 59101 0.2115 0.3493 -0.17993 2020 9 10 59102 0.2111 0.3479 -0.17910 2020 9 11 59103 0.2107 0.3465 -0.17819 2020 9 12 59104 0.2104 0.3451 -0.17724 2020 9 13 59105 0.2100 0.3438 -0.17629 2020 9 14 59106 0.2097 0.3424 -0.17543 2020 9 15 59107 0.2093 0.3410 -0.17477 2020 9 16 59108 0.2090 0.3397 -0.17437 2020 9 17 59109 0.2086 0.3384 -0.17425 2020 9 18 59110 0.2082 0.3370 -0.17436 2020 9 19 59111 0.2077 0.3357 -0.17460 2020 9 20 59112 0.2072 0.3344 -0.17486 2020 9 21 59113 0.2067 0.3331 -0.17498 2020 9 22 59114 0.2062 0.3318 -0.17488 2020 9 23 59115 0.2057 0.3305 -0.17455 2020 9 24 59116 0.2052 0.3292 -0.17406 2020 9 25 59117 0.2046 0.3280 -0.17348 2020 9 26 59118 0.2040 0.3267 -0.17293 2020 9 27 59119 0.2034 0.3255 -0.17249 2020 9 28 59120 0.2028 0.3242 -0.17221 2020 9 29 59121 0.2021 0.3230 -0.17211 2020 9 30 59122 0.2014 0.3218 -0.17217 2020 10 1 59123 0.2007 0.3205 -0.17237 2020 10 2 59124 0.1999 0.3193 -0.17264 2020 10 3 59125 0.1992 0.3181 -0.17293 2020 10 4 59126 0.1984 0.3170 -0.17317 2020 10 5 59127 0.1976 0.3158 -0.17332 2020 10 6 59128 0.1967 0.3146 -0.17334 2020 10 7 59129 0.1959 0.3135 -0.17325 2020 10 8 59130 0.1950 0.3124 -0.17304 2020 10 9 59131 0.1941 0.3112 -0.17275 2020 10 10 59132 0.1931 0.3101 -0.17244 2020 10 11 59133 0.1922 0.3090 -0.17218 2020 10 12 59134 0.1912 0.3080 -0.17206 2020 10 13 59135 0.1902 0.3069 -0.17217 2020 10 14 59136 0.1892 0.3059 -0.17256 2020 10 15 59137 0.1881 0.3048 -0.17324 2020 10 16 59138 0.1871 0.3038 -0.17410 2020 10 17 59139 0.1860 0.3028 -0.17501 2020 10 18 59140 0.1849 0.3018 -0.17580 2020 10 19 59141 0.1837 0.3009 -0.17638 2020 10 20 59142 0.1826 0.2999 -0.17667 2020 10 21 59143 0.1814 0.2990 -0.17673 2020 10 22 59144 0.1802 0.2981 -0.17662 2020 10 23 59145 0.1790 0.2972 -0.17645 2020 10 24 59146 0.1778 0.2963 -0.17632 2020 10 25 59147 0.1765 0.2955 -0.17629 2020 10 26 59148 0.1753 0.2946 -0.17639 2020 10 27 59149 0.1740 0.2938 -0.17660 2020 10 28 59150 0.1727 0.2930 -0.17692 2020 10 29 59151 0.1714 0.2922 -0.17732 2020 10 30 59152 0.1700 0.2915 -0.17775 2020 10 31 59153 0.1687 0.2907 -0.17815 2020 11 1 59154 0.1673 0.2900 -0.17849 2020 11 2 59155 0.1660 0.2893 -0.17872 2020 11 3 59156 0.1646 0.2886 -0.17882 2020 11 4 59157 0.1632 0.2880 -0.17881 2020 11 5 59158 0.1617 0.2874 -0.17872 2020 11 6 59159 0.1603 0.2868 -0.17859 2020 11 7 59160 0.1588 0.2862 -0.17850 2020 11 8 59161 0.1574 0.2856 -0.17853 2020 11 9 59162 0.1559 0.2851 -0.17874 2020 11 10 59163 0.1544 0.2846 -0.17922 2020 11 11 59164 0.1529 0.2841 -0.17996 2020 11 12 59165 0.1514 0.2836 -0.18095 2020 11 13 59166 0.1499 0.2831 -0.18205 2020 11 14 59167 0.1484 0.2827 -0.18314 2020 11 15 59168 0.1468 0.2823 -0.18405 2020 11 16 59169 0.1453 0.2819 -0.18471 2020 11 17 59170 0.1437 0.2816 -0.18509 2020 11 18 59171 0.1422 0.2813 -0.18527 2020 11 19 59172 0.1406 0.2810 -0.18532 2020 11 20 59173 0.1390 0.2807 -0.18537 2020 11 21 59174 0.1374 0.2804 -0.18548 2020 11 22 59175 0.1359 0.2802 -0.18569 2020 11 23 59176 0.1343 0.2800 -0.18601 2020 11 24 59177 0.1327 0.2798 -0.18642 2020 11 25 59178 0.1311 0.2797 -0.18689 2020 11 26 59179 0.1295 0.2796 -0.18738 2020 11 27 59180 0.1278 0.2794 -0.18785 2020 11 28 59181 0.1262 0.2794 -0.18825 2020 11 29 59182 0.1246 0.2793 -0.18853 2020 11 30 59183 0.1230 0.2793 -0.18868 2020 12 1 59184 0.1214 0.2793 -0.18869 2020 12 2 59185 0.1198 0.2793 -0.18858 2020 12 3 59186 0.1181 0.2794 -0.18839 2020 12 4 59187 0.1165 0.2794 -0.18819 2020 12 5 59188 0.1149 0.2795 -0.18806 2020 12 6 59189 0.1133 0.2797 -0.18806 2020 12 7 59190 0.1117 0.2798 -0.18827 2020 12 8 59191 0.1100 0.2800 -0.18871 2020 12 9 59192 0.1084 0.2802 -0.18936 2020 12 10 59193 0.1068 0.2804 -0.19016 2020 12 11 59194 0.1052 0.2807 -0.19100 2020 12 12 59195 0.1036 0.2810 -0.19173 2020 12 13 59196 0.1020 0.2813 -0.19227 2020 12 14 59197 0.1004 0.2816 -0.19255 2020 12 15 59198 0.0989 0.2820 -0.19261 2020 12 16 59199 0.0973 0.2824 -0.19253 2020 12 17 59200 0.0957 0.2828 -0.19240 2020 12 18 59201 0.0941 0.2832 -0.19233 2020 12 19 59202 0.0926 0.2836 -0.19237 2020 12 20 59203 0.0910 0.2841 -0.19252 2020 12 21 59204 0.0895 0.2846 -0.19270 2020 12 22 59205 0.0880 0.2852 -0.19295 2020 12 23 59206 0.0865 0.2857 -0.19322 2020 12 24 59207 0.0849 0.2863 -0.19348 2020 12 25 59208 0.0834 0.2869 -0.19368 2020 12 26 59209 0.0820 0.2875 -0.19377 2020 12 27 59210 0.0805 0.2882 -0.19373 2020 12 28 59211 0.0790 0.2889 -0.19356 2020 12 29 59212 0.0776 0.2896 -0.19326 2020 12 30 59213 0.0761 0.2903 -0.19289 2020 12 31 59214 0.0747 0.2910 -0.19250 2021 1 1 59215 0.0733 0.2918 -0.19217 2021 1 2 59216 0.0719 0.2926 -0.19198 2021 1 3 59217 0.0705 0.2934 -0.19199 2021 1 4 59218 0.0692 0.2942 -0.19222 2021 1 5 59219 0.0678 0.2951 -0.19267 2021 1 6 59220 0.0665 0.2960 -0.19325 2021 1 7 59221 0.0652 0.2969 -0.19389 2021 1 8 59222 0.0639 0.2978 -0.19447 2021 1 9 59223 0.0626 0.2987 -0.19489 2021 1 10 59224 0.0613 0.2997 -0.19510 2021 1 11 59225 0.0601 0.3007 -0.19508 2021 1 12 59226 0.0588 0.3017 -0.19491 2021 1 13 59227 0.0576 0.3027 -0.19469 2021 1 14 59228 0.0565 0.3038 -0.19449 2021 1 15 59229 0.0553 0.3048 -0.19442 2021 1 16 59230 0.0541 0.3059 -0.19448 2021 1 17 59231 0.0530 0.3070 -0.19468 2021 1 18 59232 0.0519 0.3081 -0.19497 2021 1 19 59233 0.0508 0.3093 -0.19533 2021 1 20 59234 0.0498 0.3104 -0.19568 2021 1 21 59235 0.0487 0.3116 -0.19598 2021 1 22 59236 0.0477 0.3128 -0.19619 2021 1 23 59237 0.0467 0.3140 -0.19629 2021 1 24 59238 0.0457 0.3152 -0.19625 2021 1 25 59239 0.0448 0.3165 -0.19610 2021 1 26 59240 0.0439 0.3177 -0.19587 2021 1 27 59241 0.0430 0.3190 -0.19561 2021 1 28 59242 0.0421 0.3203 -0.19539 2021 1 29 59243 0.0413 0.3216 -0.19531 2021 1 30 59244 0.0404 0.3229 -0.19544 2021 1 31 59245 0.0396 0.3243 -0.19581 2021 2 1 59246 0.0389 0.3256 -0.19641 2021 2 2 59247 0.0381 0.3270 -0.19717 2021 2 3 59248 0.0374 0.3283 -0.19800 2021 2 4 59249 0.0367 0.3297 -0.19877 2021 2 5 59250 0.0360 0.3311 -0.19939 2021 2 6 59251 0.0354 0.3325 -0.19981 2021 2 7 59252 0.0348 0.3339 -0.20001 2021 2 8 59253 0.0342 0.3354 -0.20005 2021 2 9 59254 0.0337 0.3368 -0.20002 2021 2 10 59255 0.0331 0.3382 -0.20000 2021 2 11 59256 0.0326 0.3397 -0.20009 2021 2 12 59257 0.0322 0.3412 -0.20033 2021 2 13 59258 0.0317 0.3426 -0.20073 2021 2 14 59259 0.0313 0.3441 -0.20125 2021 2 15 59260 0.0309 0.3456 -0.20186 2021 2 16 59261 0.0305 0.3471 -0.20250 2021 2 17 59262 0.0302 0.3486 -0.20310 2021 2 18 59263 0.0299 0.3501 -0.20362 2021 2 19 59264 0.0297 0.3517 -0.20403 2021 2 20 59265 0.0294 0.3532 -0.20432 2021 2 21 59266 0.0292 0.3547 -0.20448 2021 2 22 59267 0.0290 0.3562 -0.20455 2021 2 23 59268 0.0289 0.3578 -0.20457 2021 2 24 59269 0.0287 0.3593 -0.20462 2021 2 25 59270 0.0287 0.3609 -0.20477 2021 2 26 59271 0.0286 0.3624 -0.20512 2021 2 27 59272 0.0286 0.3639 -0.20573 2021 2 28 59273 0.0286 0.3655 -0.20660 2021 3 1 59274 0.0286 0.3671 -0.20769 2021 3 2 59275 0.0287 0.3686 -0.20888 2021 3 3 59276 0.0287 0.3702 -0.21003 2021 3 4 59277 0.0289 0.3717 -0.21102 2021 3 5 59278 0.0290 0.3733 -0.21178 2021 3 6 59279 0.0292 0.3748 -0.21229 2021 3 7 59280 0.0294 0.3764 -0.21259 2021 3 8 59281 0.0296 0.3779 -0.21278 2021 3 9 59282 0.0299 0.3795 -0.21293 2021 3 10 59283 0.0302 0.3810 -0.21315 2021 3 11 59284 0.0306 0.3825 -0.21348 2021 3 12 59285 0.0309 0.3841 -0.21394 2021 3 13 59286 0.0313 0.3856 -0.21453 2021 3 14 59287 0.0317 0.3871 -0.21520 2021 3 15 59288 0.0322 0.3886 -0.21591 2021 3 16 59289 0.0327 0.3902 -0.21661 2021 3 17 59290 0.0332 0.3917 -0.21725 2021 3 18 59291 0.0337 0.3932 -0.21781 2021 3 19 59292 0.0343 0.3947 -0.21825 2021 3 20 59293 0.0349 0.3962 -0.21860 2021 3 21 59294 0.0355 0.3976 -0.21887 2021 3 22 59295 0.0362 0.3991 -0.21911 2021 3 23 59296 0.0369 0.4006 -0.21938 2021 3 24 59297 0.0376 0.4020 -0.21976 2021 3 25 59298 0.0383 0.4035 -0.22033 2021 3 26 59299 0.0391 0.4049 -0.22115 2021 3 27 59300 0.0399 0.4063 -0.22225 2021 3 28 59301 0.0407 0.4077 -0.22361 2021 3 29 59302 0.0416 0.4091 -0.22513 2021 3 30 59303 0.0424 0.4105 -0.22667 2021 3 31 59304 0.0434 0.4119 -0.22807 2021 4 1 59305 0.0443 0.4132 -0.22922 2021 4 2 59306 0.0453 0.4146 -0.23008 2021 4 3 59307 0.0462 0.4159 -0.23067 2021 4 4 59308 0.0473 0.4173 -0.23104 2021 4 5 59309 0.0483 0.4186 -0.23131 2021 4 6 59310 0.0494 0.4198 -0.23158 2021 4 7 59311 0.0505 0.4211 -0.23193 2021 4 8 59312 0.0516 0.4224 -0.23240 2021 4 9 59313 0.0527 0.4236 -0.23300 2021 4 10 59314 0.0539 0.4249 -0.23372 2021 4 11 59315 0.0551 0.4261 -0.23454 2021 4 12 59316 0.0563 0.4273 -0.23540 2021 4 13 59317 0.0575 0.4284 -0.23621 2021 4 14 59318 0.0588 0.4296 -0.23689 2021 4 15 59319 0.0601 0.4307 -0.23740 2021 4 16 59320 0.0614 0.4318 -0.23775 2021 4 17 59321 0.0627 0.4330 -0.23802 2021 4 18 59322 0.0641 0.4340 -0.23823 2021 4 19 59323 0.0654 0.4351 -0.23838 2021 4 20 59324 0.0668 0.4361 -0.23859 2021 4 21 59325 0.0683 0.4372 -0.23894 2021 4 22 59326 0.0697 0.4382 -0.23949 2021 4 23 59327 0.0711 0.4391 -0.24036 2021 4 24 59328 0.0726 0.4401 -0.24155 2021 4 25 59329 0.0741 0.4410 -0.24306 2021 4 26 59330 0.0756 0.4419 -0.24473 2021 4 27 59331 0.0771 0.4428 -0.24635 2021 4 28 59332 0.0787 0.4437 -0.24779 2021 4 29 59333 0.0803 0.4445 -0.24895 2021 4 30 59334 0.0818 0.4454 -0.24980 2021 5 1 59335 0.0834 0.4462 -0.25045 2021 5 2 59336 0.0850 0.4469 -0.25101 2021 5 3 59337 0.0867 0.4477 -0.25162 2021 5 4 59338 0.0883 0.4484 -0.25231 2021 5 5 59339 0.0900 0.4491 -0.25309 2021 5 6 59340 0.0916 0.4498 -0.25392 2021 5 7 59341 0.0933 0.4504 -0.25477 2021 5 8 59342 0.0950 0.4511 -0.25550 2021 5 9 59343 0.0967 0.4517 -0.25614 2021 5 10 59344 0.0985 0.4522 -0.25665 2021 5 11 59345 0.1002 0.4528 -0.25701 2021 5 12 59346 0.1020 0.4533 -0.25718 2021 5 13 59347 0.1037 0.4538 -0.25711 2021 5 14 59348 0.1055 0.4543 -0.25683 2021 5 15 59349 0.1073 0.4547 -0.25640 2021 5 16 59350 0.1090 0.4551 -0.25592 2021 5 17 59351 0.1108 0.4555 -0.25546 2021 5 18 59352 0.1126 0.4559 -0.25510 2021 5 19 59353 0.1144 0.4562 -0.25500 2021 5 20 59354 0.1163 0.4565 -0.25520 2021 5 21 59355 0.1181 0.4568 -0.25561 2021 5 22 59356 0.1199 0.4571 -0.25629 2021 5 23 59357 0.1218 0.4573 -0.25717 2021 5 24 59358 0.1236 0.4575 -0.25810 2021 5 25 59359 0.1254 0.4577 -0.25890 2021 5 26 59360 0.1273 0.4578 -0.25946 2021 5 27 59361 0.1291 0.4579 -0.25970 2021 5 28 59362 0.1310 0.4580 -0.25969 2021 5 29 59363 0.1328 0.4581 -0.25949 2021 5 30 59364 0.1347 0.4581 -0.25923 2021 5 31 59365 0.1366 0.4581 -0.25899 2021 6 1 59366 0.1384 0.4581 -0.25885 2021 6 2 59367 0.1403 0.4580 -0.25877 2021 6 3 59368 0.1421 0.4579 -0.25871 2021 6 4 59369 0.1440 0.4578 -0.25864 2021 6 5 59370 0.1459 0.4577 -0.25853 2021 6 6 59371 0.1477 0.4575 -0.25832 2021 6 7 59372 0.1496 0.4573 -0.25792 2021 6 8 59373 0.1514 0.4571 -0.25738 2021 6 9 59374 0.1533 0.4568 -0.25670 2021 6 10 59375 0.1551 0.4566 -0.25589 2021 6 11 59376 0.1569 0.4562 -0.25494 2021 6 12 59377 0.1588 0.4559 -0.25389 2021 6 13 59378 0.1606 0.4555 -0.25280 2021 6 14 59379 0.1624 0.4551 -0.25175 2021 6 15 59380 0.1642 0.4547 -0.25088 2021 6 16 59381 0.1660 0.4543 -0.25024 2021 6 17 59382 0.1678 0.4538 -0.24982 2021 6 18 59383 0.1696 0.4533 -0.24957 2021 6 19 59384 0.1714 0.4528 -0.24949 2021 6 20 59385 0.1732 0.4522 -0.24950 2021 6 21 59386 0.1749 0.4516 -0.24952 2021 6 22 59387 0.1767 0.4510 -0.24938 2021 6 23 59388 0.1784 0.4504 -0.24899 2021 6 24 59389 0.1801 0.4497 -0.24831 2021 6 25 59390 0.1818 0.4490 -0.24746 2021 6 26 59391 0.1835 0.4483 -0.24651 2021 6 27 59392 0.1852 0.4475 -0.24552 2021 6 28 59393 0.1869 0.4467 -0.24459 2021 6 29 59394 0.1886 0.4459 -0.24384 2021 6 30 59395 0.1902 0.4451 -0.24325 2021 7 1 59396 0.1918 0.4443 -0.24271 2021 7 2 59397 0.1934 0.4434 -0.24218 2021 7 3 59398 0.1950 0.4425 -0.24163 2021 7 4 59399 0.1966 0.4416 -0.24098 2021 7 5 59400 0.1982 0.4406 -0.24012 2021 7 6 59401 0.1997 0.4396 -0.23913 2021 7 7 59402 0.2012 0.4386 -0.23800 2021 7 8 59403 0.2027 0.4376 -0.23681 2021 7 9 59404 0.2042 0.4366 -0.23562 2021 7 10 59405 0.2057 0.4355 -0.23440 2021 7 11 59406 0.2071 0.4344 -0.23321 2021 7 12 59407 0.2086 0.4333 -0.23212 2021 7 13 59408 0.2100 0.4322 -0.23122 2021 7 14 59409 0.2114 0.4310 -0.23055 2021 7 15 59410 0.2127 0.4298 -0.23008 2021 7 16 59411 0.2141 0.4286 -0.22975 2021 7 17 59412 0.2154 0.4274 -0.22945 2021 7 18 59413 0.2167 0.4262 -0.22910 2021 7 19 59414 0.2180 0.4249 -0.22858 2021 7 20 59415 0.2192 0.4236 -0.22785 2021 7 21 59416 0.2204 0.4223 -0.22693 2021 7 22 59417 0.2216 0.4210 -0.22577 2021 7 23 59418 0.2228 0.4196 -0.22448 2021 7 24 59419 0.2240 0.4183 -0.22317 2021 7 25 59420 0.2251 0.4169 -0.22195 2021 7 26 59421 0.2262 0.4155 -0.22090 2021 7 27 59422 0.2273 0.4141 -0.22002 2021 7 28 59423 0.2283 0.4127 -0.21933 2021 7 29 59424 0.2293 0.4112 -0.21872 2021 7 30 59425 0.2303 0.4097 -0.21809 2021 7 31 59426 0.2313 0.4083 -0.21735 2021 8 1 59427 0.2322 0.4068 -0.21648 2021 8 2 59428 0.2331 0.4053 -0.21549 2021 8 3 59429 0.2340 0.4037 -0.21441 2021 8 4 59430 0.2348 0.4022 -0.21325 2021 8 5 59431 0.2357 0.4006 -0.21201 2021 8 6 59432 0.2365 0.3991 -0.21077 2021 8 7 59433 0.2372 0.3975 -0.20953 2021 8 8 59434 0.2379 0.3959 -0.20835 2021 8 9 59435 0.2386 0.3943 -0.20730 2021 8 10 59436 0.2393 0.3927 -0.20639 2021 8 11 59437 0.2400 0.3911 -0.20568 2021 8 12 59438 0.2406 0.3894 -0.20513 2021 8 13 59439 0.2411 0.3878 -0.20470 2021 8 14 59440 0.2417 0.3861 -0.20422 2021 8 15 59441 0.2422 0.3845 -0.20360 2021 8 16 59442 0.2427 0.3828 -0.20280 2021 8 17 59443 0.2432 0.3811 -0.20181 2021 8 18 59444 0.2436 0.3794 -0.20062 2021 8 19 59445 0.2440 0.3777 -0.19932 2021 8 20 59446 0.2443 0.3760 -0.19802 2021 8 21 59447 0.2446 0.3743 -0.19683 2021 8 22 59448 0.2449 0.3726 -0.19579 2021 8 23 59449 0.2452 0.3709 -0.19501 2021 8 24 59450 0.2454 0.3691 -0.19450 2021 8 25 59451 0.2456 0.3674 -0.19413 2021 8 26 59452 0.2458 0.3657 -0.19382 2021 8 27 59453 0.2459 0.3639 -0.19350 2021 8 28 59454 0.2460 0.3622 -0.19305 2021 8 29 59455 0.2461 0.3604 -0.19240 2021 8 30 59456 0.2461 0.3587 -0.19154 2021 8 31 59457 0.2461 0.3569 -0.19053 2021 9 1 59458 0.2461 0.3552 -0.18944 2021 9 2 59459 0.2460 0.3535 -0.18829 2021 9 3 59460 0.2459 0.3517 -0.18718 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) 59074 -117.15 0.66 -9.89 0.22 59075 -117.67 0.66 -10.05 0.22 59076 -117.80 0.66 -10.29 0.22 59077 -117.59 0.45 -10.52 0.20 59078 -117.29 0.33 -10.67 0.20 59079 -117.06 0.26 -10.66 0.20 59080 -116.89 0.26 -10.48 0.20 IERS Celestial Pole Offset Final Series MJD dpsi deps (msec. of arc) 59032 -112.0 -10.0 59033 -112.2 -10.1 59034 -112.0 -10.1 59035 -111.6 -10.1 59036 -111.3 -10.2 59037 -111.2 -10.4 59038 -111.4 -10.5 59039 -111.8 -10.5 59040 -112.3 -10.5 59041 -112.6 -10.4 59042 -112.9 -10.4 59043 -113.0 -10.3 59044 -113.3 -10.1 59045 -113.7 -9.9 59046 -114.2 -9.7 59047 -114.6 -9.8 59048 -114.7 -10.1 59049 -114.6 -10.4 59050 -114.4 -10.6 59051 -114.3 -10.6 59052 -114.3 -10.4 59053 -114.4 -10.3 59054 -114.5 -10.3 59055 -114.6 -10.3 59056 -114.8 -10.4 59057 -115.0 -10.3 59058 -115.2 -10.2 59059 -115.8 -10.1 59060 -116.4 -10.0 59061 -116.7 -9.9 59062 -116.6 -10.0 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 59074 0.232 0.262 -0.161 0.217 59075 0.220 0.262 -0.175 0.217 59076 0.205 0.262 -0.186 0.217 59077 0.186 0.178 -0.195 0.199 59078 0.166 0.132 -0.203 0.198 59079 0.144 0.105 -0.209 0.198 59080 0.121 0.105 -0.215 0.198 IAU2000A Celestial Pole Offset Final Series MJD dX dY (msec. of arc) 59032 0.13 -0.16 59033 0.14 -0.17 59034 0.17 -0.17 59035 0.20 -0.18 59036 0.23 -0.19 59037 0.25 -0.19 59038 0.23 -0.19 59039 0.18 -0.18 59040 0.14 -0.18 59041 0.13 -0.17 59042 0.13 -0.15 59043 0.13 -0.14 59044 0.12 -0.13 59045 0.14 -0.14 59046 0.16 -0.17 59047 0.18 -0.19 59048 0.19 -0.18 59049 0.19 -0.16 59050 0.20 -0.15 59051 0.20 -0.13 59052 0.17 -0.13 59053 0.12 -0.13 59054 0.08 -0.13 59055 0.09 -0.12 59056 0.10 -0.12 59057 0.12 -0.11 59058 0.14 -0.10 59059 0.09 -0.05 59060 0.01 0.02 59061 -0.06 0.09 59062 -0.06 0.08 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).