********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 6 August 2020 Vol. XXXIII No. 032 ______________________________________________________________________ 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 31 59061 0.19991 .00009 0.39598 .00009 -0.209182 0.000015 20 8 1 59062 0.20103 .00009 0.39487 .00009 -0.208126 0.000015 20 8 2 59063 0.20251 .00009 0.39413 .00009 -0.207055 0.000018 20 8 3 59064 0.20384 .00009 0.39368 .00009 -0.206064 0.000019 20 8 4 59065 0.20500 .00009 0.39320 .00009 -0.205199 0.000019 20 8 5 59066 0.20611 .00009 0.39252 .00009 -0.204485 0.000020 20 8 6 59067 0.20708 .00009 0.39170 .00009 -0.203920 0.000055 IERS Final Values MJD x y UT1-UTC " " s 20 6 2 59002 0.1154 0.4410 -0.25526 20 6 3 59003 0.1166 0.4406 -0.25581 20 6 4 59004 0.1180 0.4403 -0.25614 20 6 5 59005 0.1196 0.4404 -0.25621 20 6 6 59006 0.1213 0.4408 -0.25604 20 6 7 59007 0.1230 0.4413 -0.25567 20 6 8 59008 0.1242 0.4417 -0.25519 20 6 9 59009 0.1253 0.4416 -0.25464 20 6 10 59010 0.1269 0.4411 -0.25403 20 6 11 59011 0.1287 0.4407 -0.25338 20 6 12 59012 0.1306 0.4408 -0.25271 20 6 13 59013 0.1324 0.4408 -0.25209 20 6 14 59014 0.1344 0.4407 -0.25157 20 6 15 59015 0.1364 0.4405 -0.25115 20 6 16 59016 0.1383 0.4399 -0.25076 20 6 17 59017 0.1404 0.4393 -0.25027 20 6 18 59018 0.1425 0.4388 -0.24969 20 6 19 59019 0.1449 0.4380 -0.24902 20 6 20 59020 0.1471 0.4376 -0.24810 20 6 21 59021 0.1493 0.4371 -0.24706 20 6 22 59022 0.1512 0.4365 -0.24590 20 6 23 59023 0.1525 0.4358 -0.24471 20 6 24 59024 0.1540 0.4350 -0.24358 20 6 25 59025 0.1554 0.4345 -0.24261 20 6 26 59026 0.1569 0.4339 -0.24187 20 6 27 59027 0.1589 0.4333 -0.24136 20 6 28 59028 0.1608 0.4328 -0.24103 20 6 29 59029 0.1627 0.4322 -0.24081 20 6 30 59030 0.1648 0.4321 -0.24057 20 7 1 59031 0.1669 0.4316 -0.24015 _______________________________________________________________________ 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 = 0.1220 + 0.0781 cos A + 0.0428 sin A + 0.0061 cos C - 0.0020 sin C y = 0.3581 + 0.0380 cos A - 0.0752 sin A - 0.0020 cos C - 0.0061 sin C UT1-UTC = -0.2147 - 0.00010 (MJD - 59075) - (UT2-UT1) where A = 2*pi*(MJD-59067)/365.25 and C = 2*pi*(MJD-59067)/435. TAI-UTC(MJD 59068) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59067)**0.80 S t = 0.00025 (MJD-59067)**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 8 7 59068 0.2079 0.3907 -0.20348 2020 8 8 59069 0.2086 0.3897 -0.20315 2020 8 9 59070 0.2094 0.3885 -0.20289 2020 8 10 59071 0.2101 0.3874 -0.20260 2020 8 11 59072 0.2108 0.3863 -0.20222 2020 8 12 59073 0.2115 0.3852 -0.20170 2020 8 13 59074 0.2121 0.3840 -0.20103 2020 8 14 59075 0.2126 0.3828 -0.20025 2020 8 15 59076 0.2131 0.3816 -0.19939 2020 8 16 59077 0.2136 0.3803 -0.19855 2020 8 17 59078 0.2141 0.3790 -0.19781 2020 8 18 59079 0.2146 0.3777 -0.19723 2020 8 19 59080 0.2150 0.3764 -0.19686 2020 8 20 59081 0.2154 0.3750 -0.19675 2020 8 21 59082 0.2158 0.3736 -0.19685 2020 8 22 59083 0.2162 0.3723 -0.19706 2020 8 23 59084 0.2165 0.3709 -0.19725 2020 8 24 59085 0.2168 0.3695 -0.19729 2020 8 25 59086 0.2170 0.3681 -0.19710 2020 8 26 59087 0.2173 0.3667 -0.19668 2020 8 27 59088 0.2175 0.3653 -0.19602 2020 8 28 59089 0.2176 0.3638 -0.19520 2020 8 29 59090 0.2178 0.3624 -0.19430 2020 8 30 59091 0.2179 0.3610 -0.19338 2020 8 31 59092 0.2180 0.3595 -0.19253 2020 9 1 59093 0.2180 0.3581 -0.19179 2020 9 2 59094 0.2181 0.3566 -0.19119 2020 9 3 59095 0.2181 0.3552 -0.19073 2020 9 4 59096 0.2180 0.3537 -0.19036 2020 9 5 59097 0.2180 0.3523 -0.19005 2020 9 6 59098 0.2179 0.3508 -0.18976 2020 9 7 59099 0.2177 0.3494 -0.18943 2020 9 8 59100 0.2176 0.3479 -0.18903 2020 9 9 59101 0.2174 0.3465 -0.18853 2020 9 10 59102 0.2172 0.3450 -0.18793 2020 9 11 59103 0.2170 0.3436 -0.18725 2020 9 12 59104 0.2167 0.3421 -0.18653 2020 9 13 59105 0.2164 0.3407 -0.18584 2020 9 14 59106 0.2161 0.3392 -0.18527 2020 9 15 59107 0.2157 0.3378 -0.18490 2020 9 16 59108 0.2153 0.3364 -0.18482 2020 9 17 59109 0.2149 0.3349 -0.18505 2020 9 18 59110 0.2145 0.3335 -0.18553 2020 9 19 59111 0.2140 0.3321 -0.18615 2020 9 20 59112 0.2135 0.3307 -0.18675 2020 9 21 59113 0.2129 0.3293 -0.18719 2020 9 22 59114 0.2124 0.3279 -0.18740 2020 9 23 59115 0.2118 0.3265 -0.18738 2020 9 24 59116 0.2112 0.3251 -0.18720 2020 9 25 59117 0.2105 0.3238 -0.18693 2020 9 26 59118 0.2099 0.3224 -0.18667 2020 9 27 59119 0.2092 0.3211 -0.18649 2020 9 28 59120 0.2085 0.3197 -0.18644 2020 9 29 59121 0.2077 0.3184 -0.18655 2020 9 30 59122 0.2069 0.3171 -0.18679 2020 10 1 59123 0.2061 0.3158 -0.18715 2020 10 2 59124 0.2053 0.3145 -0.18759 2020 10 3 59125 0.2044 0.3132 -0.18805 2020 10 4 59126 0.2036 0.3119 -0.18848 2020 10 5 59127 0.2027 0.3107 -0.18882 2020 10 6 59128 0.2017 0.3094 -0.18906 2020 10 7 59129 0.2008 0.3082 -0.18917 2020 10 8 59130 0.1998 0.3070 -0.18919 2020 10 9 59131 0.1988 0.3058 -0.18912 2020 10 10 59132 0.1977 0.3046 -0.18905 2020 10 11 59133 0.1967 0.3034 -0.18902 2020 10 12 59134 0.1956 0.3023 -0.18915 2020 10 13 59135 0.1945 0.3011 -0.18951 2020 10 14 59136 0.1934 0.3000 -0.19015 2020 10 15 59137 0.1922 0.2989 -0.19108 2020 10 16 59138 0.1911 0.2978 -0.19220 2020 10 17 59139 0.1899 0.2967 -0.19338 2020 10 18 59140 0.1887 0.2957 -0.19445 2020 10 19 59141 0.1874 0.2946 -0.19530 2020 10 20 59142 0.1862 0.2936 -0.19586 2020 10 21 59143 0.1849 0.2926 -0.19618 2020 10 22 59144 0.1836 0.2917 -0.19634 2020 10 23 59145 0.1823 0.2907 -0.19643 2020 10 24 59146 0.1810 0.2898 -0.19654 2020 10 25 59147 0.1796 0.2889 -0.19674 2020 10 26 59148 0.1783 0.2880 -0.19706 2020 10 27 59149 0.1769 0.2871 -0.19749 2020 10 28 59150 0.1755 0.2862 -0.19803 2020 10 29 59151 0.1741 0.2854 -0.19864 2020 10 30 59152 0.1726 0.2846 -0.19926 2020 10 31 59153 0.1712 0.2838 -0.19985 2020 11 1 59154 0.1697 0.2830 -0.20037 2020 11 2 59155 0.1682 0.2823 -0.20077 2020 11 3 59156 0.1667 0.2816 -0.20105 2020 11 4 59157 0.1652 0.2809 -0.20120 2020 11 5 59158 0.1637 0.2802 -0.20126 2020 11 6 59159 0.1621 0.2796 -0.20127 2020 11 7 59160 0.1606 0.2789 -0.20131 2020 11 8 59161 0.1590 0.2783 -0.20145 2020 11 9 59162 0.1574 0.2778 -0.20178 2020 11 10 59163 0.1558 0.2772 -0.20236 2020 11 11 59164 0.1542 0.2767 -0.20320 2020 11 12 59165 0.1526 0.2762 -0.20426 2020 11 13 59166 0.1510 0.2757 -0.20544 2020 11 14 59167 0.1494 0.2752 -0.20658 2020 11 15 59168 0.1477 0.2748 -0.20756 2020 11 16 59169 0.1461 0.2744 -0.20827 2020 11 17 59170 0.1444 0.2740 -0.20871 2020 11 18 59171 0.1428 0.2737 -0.20893 2020 11 19 59172 0.1411 0.2734 -0.20905 2020 11 20 59173 0.1394 0.2731 -0.20916 2020 11 21 59174 0.1377 0.2728 -0.20934 2020 11 22 59175 0.1360 0.2725 -0.20963 2020 11 23 59176 0.1343 0.2723 -0.20999 2020 11 24 59177 0.1326 0.2721 -0.21045 2020 11 25 59178 0.1309 0.2720 -0.21096 2020 11 26 59179 0.1292 0.2718 -0.21150 2020 11 27 59180 0.1275 0.2717 -0.21201 2020 11 28 59181 0.1258 0.2716 -0.21244 2020 11 29 59182 0.1241 0.2716 -0.21276 2020 11 30 59183 0.1224 0.2715 -0.21294 2020 12 1 59184 0.1207 0.2715 -0.21298 2020 12 2 59185 0.1189 0.2715 -0.21290 2020 12 3 59186 0.1172 0.2716 -0.21274 2020 12 4 59187 0.1155 0.2717 -0.21259 2020 12 5 59188 0.1138 0.2718 -0.21250 2020 12 6 59189 0.1121 0.2719 -0.21256 2020 12 7 59190 0.1104 0.2721 -0.21282 2020 12 8 59191 0.1087 0.2723 -0.21332 2020 12 9 59192 0.1070 0.2725 -0.21403 2020 12 10 59193 0.1052 0.2727 -0.21489 2020 12 11 59194 0.1036 0.2730 -0.21578 2020 12 12 59195 0.1019 0.2733 -0.21657 2020 12 13 59196 0.1002 0.2736 -0.21715 2020 12 14 59197 0.0985 0.2739 -0.21747 2020 12 15 59198 0.0968 0.2743 -0.21757 2020 12 16 59199 0.0952 0.2747 -0.21752 2020 12 17 59200 0.0935 0.2751 -0.21744 2020 12 18 59201 0.0918 0.2756 -0.21740 2020 12 19 59202 0.0902 0.2761 -0.21747 2020 12 20 59203 0.0886 0.2766 -0.21766 2020 12 21 59204 0.0869 0.2771 -0.21796 2020 12 22 59205 0.0853 0.2777 -0.21833 2020 12 23 59206 0.0837 0.2782 -0.21874 2020 12 24 59207 0.0821 0.2788 -0.21913 2020 12 25 59208 0.0805 0.2795 -0.21945 2020 12 26 59209 0.0790 0.2801 -0.21967 2020 12 27 59210 0.0774 0.2808 -0.21976 2020 12 28 59211 0.0759 0.2815 -0.21972 2020 12 29 59212 0.0743 0.2823 -0.21955 2020 12 30 59213 0.0728 0.2830 -0.21930 2020 12 31 59214 0.0713 0.2838 -0.21904 2021 1 1 59215 0.0698 0.2846 -0.21883 2021 1 2 59216 0.0684 0.2854 -0.21876 2021 1 3 59217 0.0669 0.2863 -0.21889 2021 1 4 59218 0.0655 0.2872 -0.21924 2021 1 5 59219 0.0641 0.2881 -0.21979 2021 1 6 59220 0.0627 0.2890 -0.22050 2021 1 7 59221 0.0613 0.2900 -0.22124 2021 1 8 59222 0.0599 0.2909 -0.22193 2021 1 9 59223 0.0585 0.2919 -0.22246 2021 1 10 59224 0.0572 0.2929 -0.22276 2021 1 11 59225 0.0559 0.2940 -0.22285 2021 1 12 59226 0.0546 0.2950 -0.22279 2021 1 13 59227 0.0533 0.2961 -0.22265 2021 1 14 59228 0.0521 0.2972 -0.22256 2021 1 15 59229 0.0509 0.2983 -0.22257 2021 1 16 59230 0.0497 0.2995 -0.22273 2021 1 17 59231 0.0485 0.3006 -0.22301 2021 1 18 59232 0.0473 0.3018 -0.22340 2021 1 19 59233 0.0462 0.3030 -0.22383 2021 1 20 59234 0.0450 0.3042 -0.22426 2021 1 21 59235 0.0440 0.3055 -0.22464 2021 1 22 59236 0.0429 0.3067 -0.22493 2021 1 23 59237 0.0418 0.3080 -0.22510 2021 1 24 59238 0.0408 0.3093 -0.22514 2021 1 25 59239 0.0398 0.3106 -0.22506 2021 1 26 59240 0.0388 0.3119 -0.22489 2021 1 27 59241 0.0379 0.3132 -0.22469 2021 1 28 59242 0.0370 0.3146 -0.22454 2021 1 29 59243 0.0361 0.3160 -0.22452 2021 1 30 59244 0.0352 0.3174 -0.22470 2021 1 31 59245 0.0344 0.3188 -0.22513 2021 2 1 59246 0.0335 0.3202 -0.22578 2021 2 2 59247 0.0328 0.3216 -0.22659 2021 2 3 59248 0.0320 0.3231 -0.22745 2021 2 4 59249 0.0313 0.3245 -0.22826 2021 2 5 59250 0.0306 0.3260 -0.22891 2021 2 6 59251 0.0299 0.3275 -0.22935 2021 2 7 59252 0.0292 0.3289 -0.22957 2021 2 8 59253 0.0286 0.3305 -0.22961 2021 2 9 59254 0.0280 0.3320 -0.22956 2021 2 10 59255 0.0274 0.3335 -0.22952 2021 2 11 59256 0.0269 0.3350 -0.22958 2021 2 12 59257 0.0264 0.3366 -0.22977 2021 2 13 59258 0.0259 0.3381 -0.23012 2021 2 14 59259 0.0255 0.3397 -0.23060 2021 2 15 59260 0.0251 0.3413 -0.23117 2021 2 16 59261 0.0247 0.3428 -0.23177 2021 2 17 59262 0.0243 0.3444 -0.23236 2021 2 18 59263 0.0240 0.3460 -0.23287 2021 2 19 59264 0.0237 0.3476 -0.23328 2021 2 20 59265 0.0234 0.3492 -0.23355 2021 2 21 59266 0.0232 0.3508 -0.23369 2021 2 22 59267 0.0230 0.3525 -0.23373 2021 2 23 59268 0.0228 0.3541 -0.23373 2021 2 24 59269 0.0227 0.3557 -0.23377 2021 2 25 59270 0.0226 0.3573 -0.23394 2021 2 26 59271 0.0225 0.3590 -0.23436 2021 2 27 59272 0.0225 0.3606 -0.23508 2021 2 28 59273 0.0225 0.3622 -0.23613 2021 3 1 59274 0.0225 0.3639 -0.23745 2021 3 2 59275 0.0225 0.3655 -0.23893 2021 3 3 59276 0.0226 0.3671 -0.24044 2021 3 4 59277 0.0227 0.3688 -0.24184 2021 3 5 59278 0.0228 0.3704 -0.24305 2021 3 6 59279 0.0230 0.3721 -0.24403 2021 3 7 59280 0.0232 0.3737 -0.24484 2021 3 8 59281 0.0235 0.3753 -0.24556 2021 3 9 59282 0.0237 0.3770 -0.24626 2021 3 10 59283 0.0240 0.3786 -0.24703 2021 3 11 59284 0.0244 0.3802 -0.24789 2021 3 12 59285 0.0247 0.3818 -0.24882 2021 3 13 59286 0.0251 0.3835 -0.24979 2021 3 14 59287 0.0255 0.3851 -0.25075 2021 3 15 59288 0.0260 0.3867 -0.25168 2021 3 16 59289 0.0265 0.3883 -0.25255 2021 3 17 59290 0.0270 0.3899 -0.25330 2021 3 18 59291 0.0275 0.3915 -0.25388 2021 3 19 59292 0.0281 0.3930 -0.25426 2021 3 20 59293 0.0287 0.3946 -0.25449 2021 3 21 59294 0.0293 0.3962 -0.25462 2021 3 22 59295 0.0300 0.3977 -0.25472 2021 3 23 59296 0.0307 0.3993 -0.25484 2021 3 24 59297 0.0314 0.4008 -0.25516 2021 3 25 59298 0.0322 0.4024 -0.25573 2021 3 26 59299 0.0330 0.4039 -0.25650 2021 3 27 59300 0.0338 0.4054 -0.25760 2021 3 28 59301 0.0346 0.4069 -0.25901 2021 3 29 59302 0.0355 0.4084 -0.26060 2021 3 30 59303 0.0364 0.4098 -0.26221 2021 3 31 59304 0.0373 0.4113 -0.26370 2021 4 1 59305 0.0383 0.4128 -0.26494 2021 4 2 59306 0.0392 0.4142 -0.26590 2021 4 3 59307 0.0402 0.4156 -0.26660 2021 4 4 59308 0.0413 0.4170 -0.26711 2021 4 5 59309 0.0423 0.4184 -0.26754 2021 4 6 59310 0.0434 0.4198 -0.26798 2021 4 7 59311 0.0445 0.4211 -0.26847 2021 4 8 59312 0.0457 0.4225 -0.26904 2021 4 9 59313 0.0468 0.4238 -0.26966 2021 4 10 59314 0.0480 0.4251 -0.27037 2021 4 11 59315 0.0493 0.4264 -0.27108 2021 4 12 59316 0.0505 0.4277 -0.27169 2021 4 13 59317 0.0518 0.4289 -0.27226 2021 4 14 59318 0.0531 0.4302 -0.27273 2021 4 15 59319 0.0544 0.4314 -0.27308 2021 4 16 59320 0.0557 0.4326 -0.27328 2021 4 17 59321 0.0571 0.4338 -0.27333 2021 4 18 59322 0.0584 0.4349 -0.27327 2021 4 19 59323 0.0598 0.4361 -0.27315 2021 4 20 59324 0.0613 0.4372 -0.27311 2021 4 21 59325 0.0627 0.4383 -0.27324 2021 4 22 59326 0.0642 0.4394 -0.27355 2021 4 23 59327 0.0657 0.4404 -0.27408 2021 4 24 59328 0.0672 0.4414 -0.27487 2021 4 25 59329 0.0687 0.4425 -0.27591 2021 4 26 59330 0.0703 0.4434 -0.27710 2021 4 27 59331 0.0718 0.4444 -0.27826 2021 4 28 59332 0.0734 0.4453 -0.27923 2021 4 29 59333 0.0750 0.4463 -0.27988 2021 4 30 59334 0.0766 0.4472 -0.28026 2021 5 1 59335 0.0783 0.4480 -0.28039 2021 5 2 59336 0.0799 0.4489 -0.28034 2021 5 3 59337 0.0816 0.4497 -0.28023 2021 5 4 59338 0.0833 0.4505 -0.28023 2021 5 5 59339 0.0850 0.4512 -0.28038 2021 5 6 59340 0.0867 0.4520 -0.28063 2021 5 7 59341 0.0884 0.4527 -0.28097 2021 5 8 59342 0.0901 0.4534 -0.28139 2021 5 9 59343 0.0919 0.4541 -0.28178 2021 5 10 59344 0.0937 0.4547 -0.28205 2021 5 11 59345 0.0954 0.4553 -0.28221 2021 5 12 59346 0.0972 0.4559 -0.28225 2021 5 13 59347 0.0990 0.4564 -0.28219 2021 5 14 59348 0.1008 0.4570 -0.28207 2021 5 15 59349 0.1027 0.4575 -0.28182 2021 5 16 59350 0.1045 0.4579 -0.28148 2021 5 17 59351 0.1063 0.4584 -0.28112 2021 5 18 59352 0.1082 0.4588 -0.28082 2021 5 19 59353 0.1100 0.4592 -0.28068 2021 5 20 59354 0.1119 0.4596 -0.28074 2021 5 21 59355 0.1138 0.4599 -0.28099 2021 5 22 59356 0.1156 0.4602 -0.28141 2021 5 23 59357 0.1175 0.4605 -0.28195 2021 5 24 59358 0.1194 0.4607 -0.28247 2021 5 25 59359 0.1213 0.4609 -0.28287 2021 5 26 59360 0.1232 0.4611 -0.28307 2021 5 27 59361 0.1251 0.4613 -0.28293 2021 5 28 59362 0.1270 0.4614 -0.28248 2021 5 29 59363 0.1289 0.4615 -0.28183 2021 5 30 59364 0.1308 0.4616 -0.28111 2021 5 31 59365 0.1327 0.4616 -0.28044 2021 6 1 59366 0.1346 0.4617 -0.27990 2021 6 2 59367 0.1365 0.4616 -0.27955 2021 6 3 59368 0.1385 0.4616 -0.27931 2021 6 4 59369 0.1404 0.4615 -0.27912 2021 6 5 59370 0.1423 0.4614 -0.27889 2021 6 6 59371 0.1442 0.4613 -0.27860 2021 6 7 59372 0.1461 0.4611 -0.27822 2021 6 8 59373 0.1480 0.4609 -0.27774 2021 6 9 59374 0.1499 0.4607 -0.27714 2021 6 10 59375 0.1518 0.4605 -0.27641 2021 6 11 59376 0.1536 0.4602 -0.27556 2021 6 12 59377 0.1555 0.4599 -0.27457 2021 6 13 59378 0.1574 0.4595 -0.27352 2021 6 14 59379 0.1593 0.4592 -0.27244 2021 6 15 59380 0.1611 0.4588 -0.27139 2021 6 16 59381 0.1630 0.4584 -0.27046 2021 6 17 59382 0.1648 0.4579 -0.26973 2021 6 18 59383 0.1667 0.4574 -0.26920 2021 6 19 59384 0.1685 0.4569 -0.26878 2021 6 20 59385 0.1703 0.4564 -0.26841 2021 6 21 59386 0.1721 0.4558 -0.26799 2021 6 22 59387 0.1739 0.4552 -0.26741 2021 6 23 59388 0.1757 0.4546 -0.26658 2021 6 24 59389 0.1775 0.4539 -0.26548 2021 6 25 59390 0.1792 0.4532 -0.26418 2021 6 26 59391 0.1810 0.4525 -0.26281 2021 6 27 59392 0.1827 0.4518 -0.26146 2021 6 28 59393 0.1845 0.4510 -0.26028 2021 6 29 59394 0.1862 0.4503 -0.25936 2021 6 30 59395 0.1879 0.4494 -0.25860 2021 7 1 59396 0.1895 0.4486 -0.25794 2021 7 2 59397 0.1912 0.4477 -0.25734 2021 7 3 59398 0.1928 0.4468 -0.25666 2021 7 4 59399 0.1945 0.4459 -0.25583 2021 7 5 59400 0.1961 0.4450 -0.25479 2021 7 6 59401 0.1977 0.4440 -0.25359 2021 7 7 59402 0.1992 0.4430 -0.25225 2021 7 8 59403 0.2008 0.4420 -0.25075 2021 7 9 59404 0.2023 0.4409 -0.24918 2021 7 10 59405 0.2038 0.4399 -0.24760 2021 7 11 59406 0.2053 0.4388 -0.24610 2021 7 12 59407 0.2068 0.4376 -0.24475 2021 7 13 59408 0.2083 0.4365 -0.24360 2021 7 14 59409 0.2097 0.4353 -0.24273 2021 7 15 59410 0.2111 0.4342 -0.24217 2021 7 16 59411 0.2125 0.4329 -0.24179 2021 7 17 59412 0.2139 0.4317 -0.24147 2021 7 18 59413 0.2152 0.4305 -0.24116 2021 7 19 59414 0.2165 0.4292 -0.24080 2021 7 20 59415 0.2178 0.4279 -0.24027 2021 7 21 59416 0.2191 0.4266 -0.23955 2021 7 22 59417 0.2203 0.4252 -0.23873 2021 7 23 59418 0.2215 0.4239 -0.23780 2021 7 24 59419 0.2227 0.4225 -0.23692 2021 7 25 59420 0.2239 0.4211 -0.23620 2021 7 26 59421 0.2250 0.4197 -0.23563 2021 7 27 59422 0.2262 0.4183 -0.23517 2021 7 28 59423 0.2272 0.4168 -0.23486 2021 7 29 59424 0.2283 0.4153 -0.23455 2021 7 30 59425 0.2293 0.4139 -0.23417 2021 7 31 59426 0.2303 0.4123 -0.23376 2021 8 1 59427 0.2313 0.4108 -0.23324 2021 8 2 59428 0.2323 0.4093 -0.23262 2021 8 3 59429 0.2332 0.4077 -0.23183 2021 8 4 59430 0.2341 0.4062 -0.23094 2021 8 5 59431 0.2349 0.4046 -0.22999 2021 8 6 59432 0.2357 0.4030 -0.22903 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) 59045 -113.73 0.29 -9.84 0.15 59046 -114.24 0.29 -9.71 0.15 59047 -114.62 0.29 -9.79 0.15 59048 -114.73 0.49 -10.06 0.19 59049 -114.61 0.54 -10.38 0.18 59050 -114.40 0.54 -10.57 0.18 59051 -114.22 0.60 -10.57 0.16 IERS Celestial Pole Offset Final Series MJD dpsi deps (msec. of arc) 59002 -106.7 -10.0 59003 -107.7 -9.9 59004 -108.2 -10.1 59005 -108.3 -10.3 59006 -108.1 -10.3 59007 -107.8 -10.1 59008 -107.5 -10.1 59009 -107.3 -10.3 59010 -107.5 -10.5 59011 -107.9 -10.6 59012 -108.0 -10.5 59013 -108.0 -10.4 59014 -107.9 -10.3 59015 -107.9 -10.2 59016 -108.1 -9.9 59017 -108.7 -9.8 59018 -109.4 -9.7 59019 -109.8 -9.9 59020 -109.9 -10.2 59021 -109.8 -10.5 59022 -109.7 -10.5 59023 -109.8 -10.5 59024 -109.9 -10.4 59025 -110.0 -10.4 59026 -109.8 -10.5 59027 -109.6 -10.5 59028 -109.6 -10.3 59029 -109.9 -10.1 59030 -110.6 -9.9 59031 -111.4 -9.9 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 59045 0.136 0.117 -0.174 0.154 59046 0.147 0.117 -0.171 0.154 59047 0.161 0.117 -0.169 0.154 59048 0.178 0.195 -0.168 0.194 59049 0.195 0.213 -0.166 0.183 59050 0.212 0.213 -0.164 0.183 59051 0.230 0.238 -0.162 0.161 IAU2000A Celestial Pole Offset Final Series MJD dX dY (msec. of arc) 59002 0.04 -0.02 59003 -0.01 0.04 59004 0.04 -0.04 59005 0.12 -0.15 59006 0.13 -0.12 59007 0.12 -0.05 59008 0.11 0.03 59009 0.10 0.10 59010 0.08 0.04 59011 0.06 -0.05 59012 0.11 -0.05 59013 0.18 -0.01 59014 0.25 0.02 59015 0.33 0.05 59016 0.40 0.09 59017 0.34 0.04 59018 0.25 -0.04 59019 0.16 -0.11 59020 0.14 -0.12 59021 0.16 -0.12 59022 0.17 -0.12 59023 0.18 -0.11 59024 0.20 -0.12 59025 0.22 -0.14 59026 0.24 -0.16 59027 0.23 -0.15 59028 0.20 -0.14 59029 0.18 -0.13 59030 0.15 -0.12 59031 0.14 -0.14 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).