********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 16 July 2020 Vol. XXXIII No. 029 ______________________________________________________________________ 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 7 10 59040 0.18340 .00009 0.42051 .00009 -0.230210 0.000014 20 7 11 59041 0.18514 .00009 0.41938 .00009 -0.229230 0.000015 20 7 12 59042 0.18658 .00009 0.41821 .00009 -0.228231 0.000014 20 7 13 59043 0.18760 .00009 0.41695 .00009 -0.227168 0.000009 20 7 14 59044 0.18851 .00009 0.41574 .00009 -0.226067 0.000009 20 7 15 59045 0.18968 .00009 0.41473 .00009 -0.224941 0.000007 20 7 16 59046 0.19098 .00009 0.41391 .00009 -0.223754 0.000006 _______________________________________________________________________ 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 = 0.1259 + 0.0559 cos A + 0.0711 sin A + 0.0100 cos C - 0.0018 sin C y = 0.3527 + 0.0650 cos A - 0.0545 sin A - 0.0018 cos C - 0.0100 sin C UT1-UTC = -0.2101 - 0.00011 (MJD - 59054) - (UT2-UT1) where A = 2*pi*(MJD-59046)/365.25 and C = 2*pi*(MJD-59046)/435. TAI-UTC(MJD 59047) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59046)**0.80 S t = 0.00025 (MJD-59046)**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 7 17 59047 0.1922 0.4130 -0.22248 2020 7 18 59048 0.1935 0.4122 -0.22110 2020 7 19 59049 0.1947 0.4113 -0.21963 2020 7 20 59050 0.1958 0.4103 -0.21814 2020 7 21 59051 0.1969 0.4092 -0.21673 2020 7 22 59052 0.1979 0.4081 -0.21547 2020 7 23 59053 0.1989 0.4069 -0.21441 2020 7 24 59054 0.2000 0.4058 -0.21357 2020 7 25 59055 0.2010 0.4046 -0.21294 2020 7 26 59056 0.2020 0.4034 -0.21242 2020 7 27 59057 0.2030 0.4023 -0.21190 2020 7 28 59058 0.2039 0.4011 -0.21127 2020 7 29 59059 0.2048 0.3999 -0.21044 2020 7 30 59060 0.2056 0.3987 -0.20936 2020 7 31 59061 0.2065 0.3975 -0.20809 2020 8 1 59062 0.2073 0.3962 -0.20670 2020 8 2 59063 0.2081 0.3949 -0.20528 2020 8 3 59064 0.2089 0.3937 -0.20390 2020 8 4 59065 0.2096 0.3924 -0.20263 2020 8 5 59066 0.2104 0.3911 -0.20150 2020 8 6 59067 0.2111 0.3898 -0.20052 2020 8 7 59068 0.2117 0.3884 -0.19966 2020 8 8 59069 0.2124 0.3871 -0.19890 2020 8 9 59070 0.2130 0.3858 -0.19817 2020 8 10 59071 0.2136 0.3844 -0.19743 2020 8 11 59072 0.2141 0.3830 -0.19665 2020 8 12 59073 0.2147 0.3816 -0.19579 2020 8 13 59074 0.2152 0.3803 -0.19484 2020 8 14 59075 0.2157 0.3789 -0.19380 2020 8 15 59076 0.2161 0.3774 -0.19267 2020 8 16 59077 0.2166 0.3760 -0.19154 2020 8 17 59078 0.2169 0.3746 -0.19048 2020 8 18 59079 0.2173 0.3732 -0.18959 2020 8 19 59080 0.2177 0.3717 -0.18894 2020 8 20 59081 0.2180 0.3703 -0.18860 2020 8 21 59082 0.2183 0.3688 -0.18852 2020 8 22 59083 0.2185 0.3674 -0.18862 2020 8 23 59084 0.2187 0.3659 -0.18879 2020 8 24 59085 0.2189 0.3645 -0.18888 2020 8 25 59086 0.2191 0.3630 -0.18881 2020 8 26 59087 0.2192 0.3615 -0.18854 2020 8 27 59088 0.2194 0.3600 -0.18808 2020 8 28 59089 0.2194 0.3586 -0.18748 2020 8 29 59090 0.2195 0.3571 -0.18683 2020 8 30 59091 0.2195 0.3556 -0.18622 2020 8 31 59092 0.2195 0.3541 -0.18570 2020 9 1 59093 0.2195 0.3526 -0.18531 2020 9 2 59094 0.2194 0.3511 -0.18507 2020 9 3 59095 0.2193 0.3496 -0.18496 2020 9 4 59096 0.2192 0.3482 -0.18495 2020 9 5 59097 0.2190 0.3467 -0.18499 2020 9 6 59098 0.2188 0.3452 -0.18504 2020 9 7 59099 0.2186 0.3437 -0.18504 2020 9 8 59100 0.2184 0.3422 -0.18495 2020 9 9 59101 0.2181 0.3407 -0.18475 2020 9 10 59102 0.2178 0.3393 -0.18443 2020 9 11 59103 0.2175 0.3378 -0.18403 2020 9 12 59104 0.2171 0.3363 -0.18359 2020 9 13 59105 0.2167 0.3349 -0.18316 2020 9 14 59106 0.2163 0.3334 -0.18285 2020 9 15 59107 0.2159 0.3320 -0.18275 2020 9 16 59108 0.2154 0.3305 -0.18293 2020 9 17 59109 0.2149 0.3291 -0.18341 2020 9 18 59110 0.2144 0.3276 -0.18414 2020 9 19 59111 0.2138 0.3262 -0.18497 2020 9 20 59112 0.2132 0.3248 -0.18577 2020 9 21 59113 0.2126 0.3234 -0.18638 2020 9 22 59114 0.2120 0.3220 -0.18674 2020 9 23 59115 0.2113 0.3206 -0.18685 2020 9 24 59116 0.2106 0.3192 -0.18676 2020 9 25 59117 0.2099 0.3178 -0.18657 2020 9 26 59118 0.2092 0.3165 -0.18637 2020 9 27 59119 0.2084 0.3151 -0.18623 2020 9 28 59120 0.2076 0.3138 -0.18622 2020 9 29 59121 0.2068 0.3124 -0.18635 2020 9 30 59122 0.2059 0.3111 -0.18662 2020 10 1 59123 0.2050 0.3098 -0.18699 2020 10 2 59124 0.2041 0.3085 -0.18745 2020 10 3 59125 0.2032 0.3072 -0.18792 2020 10 4 59126 0.2022 0.3060 -0.18836 2020 10 5 59127 0.2012 0.3047 -0.18873 2020 10 6 59128 0.2002 0.3035 -0.18898 2020 10 7 59129 0.1992 0.3023 -0.18913 2020 10 8 59130 0.1982 0.3011 -0.18917 2020 10 9 59131 0.1971 0.2999 -0.18915 2020 10 10 59132 0.1960 0.2987 -0.18912 2020 10 11 59133 0.1949 0.2976 -0.18915 2020 10 12 59134 0.1937 0.2964 -0.18933 2020 10 13 59135 0.1925 0.2953 -0.18974 2020 10 14 59136 0.1913 0.2942 -0.19044 2020 10 15 59137 0.1901 0.2931 -0.19142 2020 10 16 59138 0.1889 0.2920 -0.19259 2020 10 17 59139 0.1876 0.2910 -0.19381 2020 10 18 59140 0.1864 0.2900 -0.19491 2020 10 19 59141 0.1851 0.2889 -0.19579 2020 10 20 59142 0.1838 0.2879 -0.19640 2020 10 21 59143 0.1824 0.2870 -0.19676 2020 10 22 59144 0.1811 0.2860 -0.19698 2020 10 23 59145 0.1797 0.2851 -0.19715 2020 10 24 59146 0.1783 0.2842 -0.19736 2020 10 25 59147 0.1769 0.2833 -0.19767 2020 10 26 59148 0.1755 0.2824 -0.19811 2020 10 27 59149 0.1740 0.2816 -0.19868 2020 10 28 59150 0.1726 0.2808 -0.19935 2020 10 29 59151 0.1711 0.2800 -0.20008 2020 10 30 59152 0.1696 0.2792 -0.20082 2020 10 31 59153 0.1681 0.2784 -0.20153 2020 11 1 59154 0.1666 0.2777 -0.20215 2020 11 2 59155 0.1650 0.2770 -0.20257 2020 11 3 59156 0.1635 0.2763 -0.20287 2020 11 4 59157 0.1619 0.2756 -0.20303 2020 11 5 59158 0.1604 0.2750 -0.20310 2020 11 6 59159 0.1588 0.2744 -0.20313 2020 11 7 59160 0.1572 0.2738 -0.20318 2020 11 8 59161 0.1556 0.2733 -0.20333 2020 11 9 59162 0.1539 0.2727 -0.20367 2020 11 10 59163 0.1523 0.2722 -0.20426 2020 11 11 59164 0.1507 0.2717 -0.20511 2020 11 12 59165 0.1490 0.2713 -0.20620 2020 11 13 59166 0.1473 0.2708 -0.20740 2020 11 14 59167 0.1457 0.2704 -0.20858 2020 11 15 59168 0.1440 0.2700 -0.20959 2020 11 16 59169 0.1423 0.2697 -0.21034 2020 11 17 59170 0.1406 0.2693 -0.21081 2020 11 18 59171 0.1389 0.2690 -0.21108 2020 11 19 59172 0.1372 0.2688 -0.21123 2020 11 20 59173 0.1355 0.2685 -0.21137 2020 11 21 59174 0.1338 0.2683 -0.21158 2020 11 22 59175 0.1320 0.2681 -0.21190 2020 11 23 59176 0.1303 0.2679 -0.21233 2020 11 24 59177 0.1286 0.2678 -0.21286 2020 11 25 59178 0.1268 0.2677 -0.21344 2020 11 26 59179 0.1251 0.2676 -0.21405 2020 11 27 59180 0.1234 0.2675 -0.21462 2020 11 28 59181 0.1216 0.2675 -0.21512 2020 11 29 59182 0.1199 0.2675 -0.21550 2020 11 30 59183 0.1182 0.2675 -0.21574 2020 12 1 59184 0.1164 0.2676 -0.21584 2020 12 2 59185 0.1147 0.2676 -0.21582 2020 12 3 59186 0.1129 0.2677 -0.21573 2020 12 4 59187 0.1112 0.2679 -0.21563 2020 12 5 59188 0.1095 0.2680 -0.21561 2020 12 6 59189 0.1077 0.2682 -0.21573 2020 12 7 59190 0.1060 0.2684 -0.21606 2020 12 8 59191 0.1043 0.2687 -0.21662 2020 12 9 59192 0.1026 0.2689 -0.21740 2020 12 10 59193 0.1008 0.2692 -0.21832 2020 12 11 59194 0.0991 0.2696 -0.21927 2020 12 12 59195 0.0974 0.2699 -0.22012 2020 12 13 59196 0.0957 0.2703 -0.22076 2020 12 14 59197 0.0940 0.2707 -0.22114 2020 12 15 59198 0.0923 0.2711 -0.22130 2020 12 16 59199 0.0907 0.2716 -0.22131 2020 12 17 59200 0.0890 0.2721 -0.22127 2020 12 18 59201 0.0873 0.2726 -0.22128 2020 12 19 59202 0.0857 0.2731 -0.22139 2020 12 20 59203 0.0840 0.2737 -0.22163 2020 12 21 59204 0.0824 0.2743 -0.22196 2020 12 22 59205 0.0808 0.2749 -0.22237 2020 12 23 59206 0.0792 0.2756 -0.22280 2020 12 24 59207 0.0776 0.2762 -0.22321 2020 12 25 59208 0.0760 0.2769 -0.22356 2020 12 26 59209 0.0744 0.2776 -0.22379 2020 12 27 59210 0.0729 0.2784 -0.22390 2020 12 28 59211 0.0713 0.2792 -0.22387 2020 12 29 59212 0.0698 0.2800 -0.22371 2020 12 30 59213 0.0683 0.2808 -0.22347 2020 12 31 59214 0.0668 0.2816 -0.22321 2021 1 1 59215 0.0653 0.2825 -0.22300 2021 1 2 59216 0.0639 0.2834 -0.22293 2021 1 3 59217 0.0624 0.2843 -0.22305 2021 1 4 59218 0.0610 0.2852 -0.22340 2021 1 5 59219 0.0596 0.2862 -0.22395 2021 1 6 59220 0.0582 0.2872 -0.22464 2021 1 7 59221 0.0568 0.2882 -0.22537 2021 1 8 59222 0.0554 0.2892 -0.22605 2021 1 9 59223 0.0541 0.2903 -0.22656 2021 1 10 59224 0.0528 0.2914 -0.22685 2021 1 11 59225 0.0515 0.2925 -0.22692 2021 1 12 59226 0.0502 0.2936 -0.22683 2021 1 13 59227 0.0489 0.2947 -0.22669 2021 1 14 59228 0.0477 0.2959 -0.22659 2021 1 15 59229 0.0465 0.2971 -0.22659 2021 1 16 59230 0.0453 0.2983 -0.22675 2021 1 17 59231 0.0441 0.2995 -0.22705 2021 1 18 59232 0.0430 0.3007 -0.22747 2021 1 19 59233 0.0419 0.3020 -0.22795 2021 1 20 59234 0.0408 0.3033 -0.22846 2021 1 21 59235 0.0397 0.3046 -0.22894 2021 1 22 59236 0.0386 0.3059 -0.22934 2021 1 23 59237 0.0376 0.3072 -0.22965 2021 1 24 59238 0.0366 0.3086 -0.22985 2021 1 25 59239 0.0356 0.3099 -0.22994 2021 1 26 59240 0.0347 0.3113 -0.22995 2021 1 27 59241 0.0337 0.3127 -0.22994 2021 1 28 59242 0.0328 0.3141 -0.22999 2021 1 29 59243 0.0320 0.3156 -0.23018 2021 1 30 59244 0.0311 0.3170 -0.23060 2021 1 31 59245 0.0303 0.3185 -0.23128 2021 2 1 59246 0.0295 0.3199 -0.23221 2021 2 2 59247 0.0288 0.3214 -0.23330 2021 2 3 59248 0.0280 0.3229 -0.23443 2021 2 4 59249 0.0273 0.3244 -0.23547 2021 2 5 59250 0.0266 0.3260 -0.23630 2021 2 6 59251 0.0260 0.3275 -0.23686 2021 2 7 59252 0.0254 0.3291 -0.23714 2021 2 8 59253 0.0248 0.3306 -0.23720 2021 2 9 59254 0.0242 0.3322 -0.23716 2021 2 10 59255 0.0237 0.3338 -0.23714 2021 2 11 59256 0.0232 0.3354 -0.23725 2021 2 12 59257 0.0227 0.3370 -0.23755 2021 2 13 59258 0.0222 0.3386 -0.23807 2021 2 14 59259 0.0218 0.3402 -0.23876 2021 2 15 59260 0.0215 0.3418 -0.23956 2021 2 16 59261 0.0211 0.3434 -0.24039 2021 2 17 59262 0.0208 0.3451 -0.24119 2021 2 18 59263 0.0205 0.3467 -0.24190 2021 2 19 59264 0.0202 0.3484 -0.24249 2021 2 20 59265 0.0200 0.3500 -0.24293 2021 2 21 59266 0.0198 0.3517 -0.24323 2021 2 22 59267 0.0196 0.3533 -0.24340 2021 2 23 59268 0.0195 0.3550 -0.24349 2021 2 24 59269 0.0194 0.3567 -0.24356 2021 2 25 59270 0.0193 0.3584 -0.24367 2021 2 26 59271 0.0193 0.3600 -0.24391 2021 2 27 59272 0.0193 0.3617 -0.24438 2021 2 28 59273 0.0193 0.3634 -0.24508 2021 3 1 59274 0.0193 0.3651 -0.24591 2021 3 2 59275 0.0194 0.3668 -0.24685 2021 3 3 59276 0.0195 0.3684 -0.24780 2021 3 4 59277 0.0197 0.3701 -0.24862 2021 3 5 59278 0.0199 0.3718 -0.24922 2021 3 6 59279 0.0201 0.3735 -0.24957 2021 3 7 59280 0.0203 0.3752 -0.24973 2021 3 8 59281 0.0206 0.3768 -0.24976 2021 3 9 59282 0.0209 0.3785 -0.24986 2021 3 10 59283 0.0212 0.3802 -0.25008 2021 3 11 59284 0.0216 0.3818 -0.25045 2021 3 12 59285 0.0220 0.3835 -0.25094 2021 3 13 59286 0.0224 0.3852 -0.25156 2021 3 14 59287 0.0229 0.3868 -0.25230 2021 3 15 59288 0.0234 0.3884 -0.25313 2021 3 16 59289 0.0239 0.3901 -0.25397 2021 3 17 59290 0.0244 0.3917 -0.25472 2021 3 18 59291 0.0250 0.3933 -0.25533 2021 3 19 59292 0.0256 0.3950 -0.25582 2021 3 20 59293 0.0263 0.3966 -0.25615 2021 3 21 59294 0.0270 0.3982 -0.25628 2021 3 22 59295 0.0277 0.3997 -0.25628 2021 3 23 59296 0.0284 0.4013 -0.25630 2021 3 24 59297 0.0292 0.4029 -0.25643 2021 3 25 59298 0.0299 0.4045 -0.25668 2021 3 26 59299 0.0308 0.4060 -0.25718 2021 3 27 59300 0.0316 0.4075 -0.25798 2021 3 28 59301 0.0325 0.4091 -0.25904 2021 3 29 59302 0.0334 0.4106 -0.26021 2021 3 30 59303 0.0343 0.4121 -0.26142 2021 3 31 59304 0.0353 0.4136 -0.26254 2021 4 1 59305 0.0363 0.4150 -0.26350 2021 4 2 59306 0.0373 0.4165 -0.26427 2021 4 3 59307 0.0384 0.4179 -0.26481 2021 4 4 59308 0.0394 0.4193 -0.26518 2021 4 5 59309 0.0405 0.4208 -0.26548 2021 4 6 59310 0.0417 0.4222 -0.26582 2021 4 7 59311 0.0428 0.4235 -0.26630 2021 4 8 59312 0.0440 0.4249 -0.26690 2021 4 9 59313 0.0452 0.4262 -0.26759 2021 4 10 59314 0.0464 0.4276 -0.26833 2021 4 11 59315 0.0477 0.4289 -0.26908 2021 4 12 59316 0.0490 0.4302 -0.26976 2021 4 13 59317 0.0503 0.4314 -0.27037 2021 4 14 59318 0.0516 0.4327 -0.27091 2021 4 15 59319 0.0529 0.4339 -0.27124 2021 4 16 59320 0.0543 0.4351 -0.27138 2021 4 17 59321 0.0557 0.4363 -0.27133 2021 4 18 59322 0.0571 0.4375 -0.27115 2021 4 19 59323 0.0586 0.4386 -0.27091 2021 4 20 59324 0.0600 0.4398 -0.27071 2021 4 21 59325 0.0615 0.4409 -0.27067 2021 4 22 59326 0.0630 0.4419 -0.27085 2021 4 23 59327 0.0645 0.4430 -0.27126 2021 4 24 59328 0.0661 0.4440 -0.27192 2021 4 25 59329 0.0676 0.4451 -0.27280 2021 4 26 59330 0.0692 0.4460 -0.27380 2021 4 27 59331 0.0708 0.4470 -0.27482 2021 4 28 59332 0.0724 0.4480 -0.27568 2021 4 29 59333 0.0741 0.4489 -0.27629 2021 4 30 59334 0.0757 0.4498 -0.27663 2021 5 1 59335 0.0774 0.4506 -0.27672 2021 5 2 59336 0.0791 0.4515 -0.27665 2021 5 3 59337 0.0808 0.4523 -0.27652 2021 5 4 59338 0.0825 0.4531 -0.27637 2021 5 5 59339 0.0842 0.4539 -0.27630 2021 5 6 59340 0.0860 0.4546 -0.27632 2021 5 7 59341 0.0877 0.4553 -0.27642 2021 5 8 59342 0.0895 0.4560 -0.27652 2021 5 9 59343 0.0913 0.4566 -0.27657 2021 5 10 59344 0.0931 0.4573 -0.27656 2021 5 11 59345 0.0949 0.4579 -0.27645 2021 5 12 59346 0.0967 0.4585 -0.27618 2021 5 13 59347 0.0985 0.4590 -0.27573 2021 5 14 59348 0.1004 0.4595 -0.27511 2021 5 15 59349 0.1022 0.4600 -0.27436 2021 5 16 59350 0.1041 0.4605 -0.27351 2021 5 17 59351 0.1059 0.4609 -0.27271 2021 5 18 59352 0.1078 0.4613 -0.27208 2021 5 19 59353 0.1097 0.4617 -0.27162 2021 5 20 59354 0.1116 0.4621 -0.27139 2021 5 21 59355 0.1135 0.4624 -0.27145 2021 5 22 59356 0.1154 0.4627 -0.27171 2021 5 23 59357 0.1173 0.4629 -0.27206 2021 5 24 59358 0.1192 0.4632 -0.27238 2021 5 25 59359 0.1211 0.4634 -0.27257 2021 5 26 59360 0.1231 0.4635 -0.27254 2021 5 27 59361 0.1250 0.4637 -0.27220 2021 5 28 59362 0.1269 0.4638 -0.27162 2021 5 29 59363 0.1288 0.4639 -0.27090 2021 5 30 59364 0.1308 0.4639 -0.27018 2021 5 31 59365 0.1327 0.4639 -0.26956 2021 6 1 59366 0.1346 0.4639 -0.26908 2021 6 2 59367 0.1366 0.4639 -0.26877 2021 6 3 59368 0.1385 0.4638 -0.26866 2021 6 4 59369 0.1404 0.4637 -0.26860 2021 6 5 59370 0.1423 0.4636 -0.26851 2021 6 6 59371 0.1443 0.4634 -0.26837 2021 6 7 59372 0.1462 0.4633 -0.26821 2021 6 8 59373 0.1481 0.4630 -0.26792 2021 6 9 59374 0.1500 0.4628 -0.26750 2021 6 10 59375 0.1519 0.4625 -0.26701 2021 6 11 59376 0.1538 0.4622 -0.26636 2021 6 12 59377 0.1557 0.4619 -0.26564 2021 6 13 59378 0.1576 0.4615 -0.26493 2021 6 14 59379 0.1595 0.4611 -0.26424 2021 6 15 59380 0.1614 0.4607 -0.26362 2021 6 16 59381 0.1633 0.4602 -0.26320 2021 6 17 59382 0.1651 0.4597 -0.26294 2021 6 18 59383 0.1670 0.4592 -0.26284 2021 6 19 59384 0.1688 0.4587 -0.26295 2021 6 20 59385 0.1706 0.4581 -0.26316 2021 6 21 59386 0.1725 0.4575 -0.26335 2021 6 22 59387 0.1743 0.4569 -0.26336 2021 6 23 59388 0.1761 0.4562 -0.26313 2021 6 24 59389 0.1779 0.4555 -0.26270 2021 6 25 59390 0.1796 0.4548 -0.26209 2021 6 26 59391 0.1814 0.4541 -0.26135 2021 6 27 59392 0.1831 0.4533 -0.26062 2021 6 28 59393 0.1849 0.4525 -0.25998 2021 6 29 59394 0.1866 0.4517 -0.25945 2021 6 30 59395 0.1883 0.4508 -0.25905 2021 7 1 59396 0.1900 0.4500 -0.25877 2021 7 2 59397 0.1916 0.4491 -0.25854 2021 7 3 59398 0.1933 0.4481 -0.25834 2021 7 4 59399 0.1949 0.4472 -0.25804 2021 7 5 59400 0.1966 0.4462 -0.25754 2021 7 6 59401 0.1981 0.4452 -0.25687 2021 7 7 59402 0.1997 0.4441 -0.25610 2021 7 8 59403 0.2013 0.4431 -0.25519 2021 7 9 59404 0.2028 0.4420 -0.25421 2021 7 10 59405 0.2044 0.4409 -0.25326 2021 7 11 59406 0.2059 0.4397 -0.25238 2021 7 12 59407 0.2073 0.4386 -0.25162 2021 7 13 59408 0.2088 0.4374 -0.25102 2021 7 14 59409 0.2102 0.4362 -0.25061 2021 7 15 59410 0.2116 0.4350 -0.25039 2021 7 16 59411 0.2130 0.4337 -0.25033 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) 59024 -109.94 0.47 -10.36 0.11 59025 -110.05 0.47 -10.36 0.11 59026 -109.96 0.47 -10.42 0.11 59027 -109.72 0.89 -10.41 0.11 59028 -109.60 0.66 -10.28 0.14 59029 -109.87 0.66 -10.06 0.14 59030 -110.53 0.36 -9.89 0.16 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 59024 0.185 0.187 -0.110 0.110 59025 0.195 0.187 -0.119 0.110 59026 0.204 0.187 -0.128 0.110 59027 0.207 0.356 -0.135 0.114 59028 0.202 0.262 -0.142 0.139 59029 0.191 0.262 -0.149 0.139 59030 0.178 0.143 -0.156 0.155 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).