********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 2 April 2020 Vol. XXXIII No. 014 ______________________________________________________________________ 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 27 58935 0.04422 .00009 0.39410 .00009 -0.223573 0.000025 20 3 28 58936 0.04472 .00009 0.39515 .00009 -0.224034 0.000023 20 3 29 58937 0.04576 .00009 0.39645 .00009 -0.224430 0.000020 20 3 30 58938 0.04709 .00009 0.39799 .00009 -0.224714 0.000015 20 3 31 58939 0.04880 .00009 0.39963 .00009 -0.224931 0.000014 20 4 1 58940 0.05074 .00009 0.40135 .00009 -0.225153 0.000010 20 4 2 58941 0.05258 .00009 0.40326 .00009 -0.225416 0.000055 IERS Final Values MJD x y UT1-UTC " " s 20 2 2 58881 0.0435 0.3160 -0.19172 20 2 3 58882 0.0427 0.3177 -0.19217 20 2 4 58883 0.0422 0.3194 -0.19251 20 2 5 58884 0.0422 0.3212 -0.19274 20 2 6 58885 0.0414 0.3229 -0.19286 20 2 7 58886 0.0401 0.3240 -0.19294 20 2 8 58887 0.0387 0.3249 -0.19302 20 2 9 58888 0.0379 0.3253 -0.19327 20 2 10 58889 0.0376 0.3260 -0.19379 20 2 11 58890 0.0373 0.3273 -0.19459 20 2 12 58891 0.0374 0.3287 -0.19554 20 2 13 58892 0.0374 0.3302 -0.19653 20 2 14 58893 0.0365 0.3320 -0.19743 20 2 15 58894 0.0349 0.3333 -0.19814 20 2 16 58895 0.0331 0.3340 -0.19862 20 2 17 58896 0.0315 0.3349 -0.19892 20 2 18 58897 0.0307 0.3360 -0.19907 20 2 19 58898 0.0303 0.3376 -0.19910 20 2 20 58899 0.0296 0.3390 -0.19912 20 2 21 58900 0.0285 0.3400 -0.19923 20 2 22 58901 0.0275 0.3408 -0.19951 20 2 23 58902 0.0270 0.3416 -0.19997 20 2 24 58903 0.0271 0.3427 -0.20056 20 2 25 58904 0.0274 0.3446 -0.20125 20 2 26 58905 0.0280 0.3467 -0.20199 20 2 27 58906 0.0285 0.3489 -0.20276 20 2 28 58907 0.0288 0.3511 -0.20353 20 2 29 58908 0.0282 0.3533 -0.20427 20 3 1 58909 0.0277 0.3553 -0.20497 _______________________________________________________________________ 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 = 0.1350 - 0.0933 cos A + 0.0371 sin A + 0.0114 cos C + 0.0143 sin C y = 0.3540 + 0.0350 cos A + 0.0844 sin A + 0.0143 cos C - 0.0114 sin C UT1-UTC = -0.2066 - 0.00018 (MJD - 58949) - (UT2-UT1) where A = 2*pi*(MJD-58941)/365.25 and C = 2*pi*(MJD-58941)/435. TAI-UTC(MJD 58942) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58941)**0.80 S t = 0.00025 (MJD-58941)**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 3 58942 0.0540 0.4052 -0.22578 2020 4 4 58943 0.0552 0.4069 -0.22637 2020 4 5 58944 0.0562 0.4085 -0.22724 2020 4 6 58945 0.0573 0.4098 -0.22842 2020 4 7 58946 0.0583 0.4110 -0.22984 2020 4 8 58947 0.0595 0.4122 -0.23138 2020 4 9 58948 0.0607 0.4134 -0.23289 2020 4 10 58949 0.0619 0.4147 -0.23422 2020 4 11 58950 0.0631 0.4160 -0.23528 2020 4 12 58951 0.0643 0.4172 -0.23606 2020 4 13 58952 0.0655 0.4184 -0.23660 2020 4 14 58953 0.0667 0.4195 -0.23697 2020 4 15 58954 0.0679 0.4205 -0.23724 2020 4 16 58955 0.0692 0.4215 -0.23748 2020 4 17 58956 0.0704 0.4224 -0.23775 2020 4 18 58957 0.0718 0.4234 -0.23807 2020 4 19 58958 0.0731 0.4243 -0.23846 2020 4 20 58959 0.0744 0.4252 -0.23893 2020 4 21 58960 0.0757 0.4260 -0.23947 2020 4 22 58961 0.0770 0.4269 -0.24005 2020 4 23 58962 0.0783 0.4277 -0.24063 2020 4 24 58963 0.0797 0.4284 -0.24116 2020 4 25 58964 0.0811 0.4292 -0.24160 2020 4 26 58965 0.0825 0.4299 -0.24193 2020 4 27 58966 0.0840 0.4306 -0.24216 2020 4 28 58967 0.0855 0.4313 -0.24232 2020 4 29 58968 0.0870 0.4319 -0.24245 2020 4 30 58969 0.0885 0.4326 -0.24262 2020 5 1 58970 0.0900 0.4332 -0.24292 2020 5 2 58971 0.0915 0.4338 -0.24342 2020 5 3 58972 0.0931 0.4343 -0.24417 2020 5 4 58973 0.0946 0.4349 -0.24517 2020 5 5 58974 0.0962 0.4354 -0.24632 2020 5 6 58975 0.0978 0.4359 -0.24749 2020 5 7 58976 0.0995 0.4364 -0.24853 2020 5 8 58977 0.1011 0.4368 -0.24933 2020 5 9 58978 0.1027 0.4372 -0.24983 2020 5 10 58979 0.1044 0.4377 -0.25009 2020 5 11 58980 0.1060 0.4380 -0.25015 2020 5 12 58981 0.1077 0.4384 -0.25012 2020 5 13 58982 0.1094 0.4387 -0.25008 2020 5 14 58983 0.1111 0.4390 -0.25010 2020 5 15 58984 0.1128 0.4393 -0.25020 2020 5 16 58985 0.1145 0.4396 -0.25041 2020 5 17 58986 0.1162 0.4398 -0.25072 2020 5 18 58987 0.1179 0.4400 -0.25111 2020 5 19 58988 0.1196 0.4402 -0.25153 2020 5 20 58989 0.1213 0.4404 -0.25193 2020 5 21 58990 0.1231 0.4405 -0.25228 2020 5 22 58991 0.1248 0.4406 -0.25253 2020 5 23 58992 0.1265 0.4407 -0.25264 2020 5 24 58993 0.1283 0.4407 -0.25259 2020 5 25 58994 0.1300 0.4407 -0.25242 2020 5 26 58995 0.1317 0.4407 -0.25216 2020 5 27 58996 0.1335 0.4407 -0.25189 2020 5 28 58997 0.1352 0.4407 -0.25170 2020 5 29 58998 0.1370 0.4406 -0.25167 2020 5 30 58999 0.1387 0.4405 -0.25184 2020 5 31 59000 0.1404 0.4403 -0.25223 2020 6 1 59001 0.1422 0.4402 -0.25278 2020 6 2 59002 0.1439 0.4400 -0.25341 2020 6 3 59003 0.1456 0.4398 -0.25399 2020 6 4 59004 0.1474 0.4395 -0.25439 2020 6 5 59005 0.1491 0.4392 -0.25454 2020 6 6 59006 0.1508 0.4389 -0.25442 2020 6 7 59007 0.1525 0.4386 -0.25409 2020 6 8 59008 0.1543 0.4383 -0.25361 2020 6 9 59009 0.1560 0.4379 -0.25309 2020 6 10 59010 0.1577 0.4375 -0.25260 2020 6 11 59011 0.1594 0.4370 -0.25217 2020 6 12 59012 0.1610 0.4366 -0.25184 2020 6 13 59013 0.1627 0.4361 -0.25158 2020 6 14 59014 0.1644 0.4356 -0.25139 2020 6 15 59015 0.1661 0.4351 -0.25122 2020 6 16 59016 0.1677 0.4345 -0.25104 2020 6 17 59017 0.1693 0.4339 -0.25079 2020 6 18 59018 0.1710 0.4333 -0.25043 2020 6 19 59019 0.1726 0.4327 -0.24993 2020 6 20 59020 0.1742 0.4320 -0.24929 2020 6 21 59021 0.1758 0.4313 -0.24852 2020 6 22 59022 0.1774 0.4306 -0.24766 2020 6 23 59023 0.1790 0.4299 -0.24679 2020 6 24 59024 0.1805 0.4291 -0.24599 2020 6 25 59025 0.1821 0.4283 -0.24533 2020 6 26 59026 0.1836 0.4275 -0.24488 2020 6 27 59027 0.1851 0.4267 -0.24462 2020 6 28 59028 0.1867 0.4258 -0.24453 2020 6 29 59029 0.1881 0.4249 -0.24451 2020 6 30 59030 0.1896 0.4240 -0.24447 2020 7 1 59031 0.1911 0.4231 -0.24429 2020 7 2 59032 0.1925 0.4221 -0.24390 2020 7 3 59033 0.1939 0.4212 -0.24328 2020 7 4 59034 0.1953 0.4202 -0.24245 2020 7 5 59035 0.1967 0.4192 -0.24147 2020 7 6 59036 0.1981 0.4181 -0.24044 2020 7 7 59037 0.1994 0.4171 -0.23944 2020 7 8 59038 0.2008 0.4160 -0.23852 2020 7 9 59039 0.2021 0.4149 -0.23770 2020 7 10 59040 0.2034 0.4138 -0.23698 2020 7 11 59041 0.2046 0.4126 -0.23634 2020 7 12 59042 0.2059 0.4115 -0.23574 2020 7 13 59043 0.2071 0.4103 -0.23514 2020 7 14 59044 0.2083 0.4091 -0.23450 2020 7 15 59045 0.2095 0.4079 -0.23376 2020 7 16 59046 0.2106 0.4067 -0.23292 2020 7 17 59047 0.2118 0.4054 -0.23195 2020 7 18 59048 0.2129 0.4041 -0.23087 2020 7 19 59049 0.2140 0.4029 -0.22969 2020 7 20 59050 0.2150 0.4015 -0.22856 2020 7 21 59051 0.2161 0.4002 -0.22749 2020 7 22 59052 0.2171 0.3989 -0.22657 2020 7 23 59053 0.2181 0.3975 -0.22586 2020 7 24 59054 0.2190 0.3962 -0.22539 2020 7 25 59055 0.2200 0.3948 -0.22511 2020 7 26 59056 0.2209 0.3934 -0.22494 2020 7 27 59057 0.2218 0.3920 -0.22476 2020 7 28 59058 0.2226 0.3906 -0.22447 2020 7 29 59059 0.2235 0.3891 -0.22400 2020 7 30 59060 0.2243 0.3877 -0.22331 2020 7 31 59061 0.2250 0.3862 -0.22243 2020 8 1 59062 0.2258 0.3847 -0.22143 2020 8 2 59063 0.2265 0.3832 -0.22036 2020 8 3 59064 0.2272 0.3817 -0.21933 2020 8 4 59065 0.2279 0.3802 -0.21839 2020 8 5 59066 0.2285 0.3787 -0.21757 2020 8 6 59067 0.2291 0.3772 -0.21689 2020 8 7 59068 0.2297 0.3757 -0.21632 2020 8 8 59069 0.2302 0.3741 -0.21583 2020 8 9 59070 0.2307 0.3725 -0.21537 2020 8 10 59071 0.2312 0.3710 -0.21491 2020 8 11 59072 0.2317 0.3694 -0.21439 2020 8 12 59073 0.2321 0.3678 -0.21379 2020 8 13 59074 0.2325 0.3662 -0.21308 2020 8 14 59075 0.2329 0.3647 -0.21227 2020 8 15 59076 0.2332 0.3631 -0.21138 2020 8 16 59077 0.2335 0.3615 -0.21046 2020 8 17 59078 0.2338 0.3598 -0.20960 2020 8 18 59079 0.2340 0.3582 -0.20887 2020 8 19 59080 0.2342 0.3566 -0.20838 2020 8 20 59081 0.2344 0.3550 -0.20816 2020 8 21 59082 0.2346 0.3534 -0.20818 2020 8 22 59083 0.2347 0.3518 -0.20838 2020 8 23 59084 0.2348 0.3501 -0.20861 2020 8 24 59085 0.2348 0.3485 -0.20874 2020 8 25 59086 0.2348 0.3469 -0.20870 2020 8 26 59087 0.2348 0.3452 -0.20842 2020 8 27 59088 0.2348 0.3436 -0.20795 2020 8 28 59089 0.2347 0.3420 -0.20733 2020 8 29 59090 0.2346 0.3404 -0.20664 2020 8 30 59091 0.2345 0.3387 -0.20597 2020 8 31 59092 0.2343 0.3371 -0.20539 2020 9 1 59093 0.2341 0.3355 -0.20494 2020 9 2 59094 0.2339 0.3339 -0.20464 2020 9 3 59095 0.2337 0.3323 -0.20446 2020 9 4 59096 0.2334 0.3306 -0.20439 2020 9 5 59097 0.2330 0.3290 -0.20437 2020 9 6 59098 0.2327 0.3274 -0.20436 2020 9 7 59099 0.2323 0.3258 -0.20430 2020 9 8 59100 0.2319 0.3242 -0.20417 2020 9 9 59101 0.2314 0.3227 -0.20394 2020 9 10 59102 0.2310 0.3211 -0.20362 2020 9 11 59103 0.2305 0.3195 -0.20321 2020 9 12 59104 0.2299 0.3179 -0.20275 2020 9 13 59105 0.2293 0.3164 -0.20233 2020 9 14 59106 0.2287 0.3148 -0.20201 2020 9 15 59107 0.2281 0.3133 -0.20190 2020 9 16 59108 0.2275 0.3118 -0.20207 2020 9 17 59109 0.2268 0.3103 -0.20254 2020 9 18 59110 0.2260 0.3088 -0.20324 2020 9 19 59111 0.2253 0.3073 -0.20406 2020 9 20 59112 0.2245 0.3058 -0.20484 2020 9 21 59113 0.2237 0.3043 -0.20545 2020 9 22 59114 0.2229 0.3028 -0.20582 2020 9 23 59115 0.2220 0.3014 -0.20594 2020 9 24 59116 0.2211 0.3000 -0.20587 2020 9 25 59117 0.2202 0.2985 -0.20569 2020 9 26 59118 0.2192 0.2971 -0.20550 2020 9 27 59119 0.2183 0.2957 -0.20538 2020 9 28 59120 0.2173 0.2944 -0.20536 2020 9 29 59121 0.2162 0.2930 -0.20547 2020 9 30 59122 0.2152 0.2917 -0.20571 2020 10 1 59123 0.2141 0.2903 -0.20603 2020 10 2 59124 0.2130 0.2890 -0.20640 2020 10 3 59125 0.2118 0.2877 -0.20676 2020 10 4 59126 0.2107 0.2865 -0.20705 2020 10 5 59127 0.2095 0.2852 -0.20724 2020 10 6 59128 0.2083 0.2840 -0.20728 2020 10 7 59129 0.2070 0.2827 -0.20717 2020 10 8 59130 0.2058 0.2815 -0.20692 2020 10 9 59131 0.2045 0.2803 -0.20657 2020 10 10 59132 0.2032 0.2792 -0.20620 2020 10 11 59133 0.2018 0.2780 -0.20588 2020 10 12 59134 0.2005 0.2769 -0.20571 2020 10 13 59135 0.1991 0.2758 -0.20578 2020 10 14 59136 0.1977 0.2747 -0.20614 2020 10 15 59137 0.1963 0.2737 -0.20677 2020 10 16 59138 0.1948 0.2726 -0.20759 2020 10 17 59139 0.1933 0.2716 -0.20844 2020 10 18 59140 0.1919 0.2706 -0.20917 2020 10 19 59141 0.1903 0.2697 -0.20965 2020 10 20 59142 0.1888 0.2687 -0.20984 2020 10 21 59143 0.1873 0.2678 -0.20978 2020 10 22 59144 0.1857 0.2669 -0.20955 2020 10 23 59145 0.1841 0.2660 -0.20926 2020 10 24 59146 0.1825 0.2652 -0.20902 2020 10 25 59147 0.1809 0.2643 -0.20889 2020 10 26 59148 0.1793 0.2635 -0.20890 2020 10 27 59149 0.1776 0.2628 -0.20905 2020 10 28 59150 0.1759 0.2620 -0.20931 2020 10 29 59151 0.1743 0.2613 -0.20962 2020 10 30 59152 0.1726 0.2606 -0.20995 2020 10 31 59153 0.1708 0.2599 -0.21025 2020 11 1 59154 0.1691 0.2593 -0.21049 2020 11 2 59155 0.1674 0.2586 -0.21064 2020 11 3 59156 0.1656 0.2580 -0.21070 2020 11 4 59157 0.1638 0.2575 -0.21069 2020 11 5 59158 0.1621 0.2569 -0.21062 2020 11 6 59159 0.1603 0.2564 -0.21055 2020 11 7 59160 0.1585 0.2560 -0.21051 2020 11 8 59161 0.1567 0.2555 -0.21058 2020 11 9 59162 0.1548 0.2551 -0.21089 2020 11 10 59163 0.1530 0.2547 -0.21147 2020 11 11 59164 0.1512 0.2543 -0.21238 2020 11 12 59165 0.1493 0.2540 -0.21357 2020 11 13 59166 0.1474 0.2536 -0.21489 2020 11 14 59167 0.1456 0.2534 -0.21620 2020 11 15 59168 0.1437 0.2531 -0.21737 2020 11 16 59169 0.1418 0.2529 -0.21826 2020 11 17 59170 0.1399 0.2527 -0.21882 2020 11 18 59171 0.1381 0.2525 -0.21920 2020 11 19 59172 0.1362 0.2524 -0.21941 2020 11 20 59173 0.1343 0.2522 -0.21957 2020 11 21 59174 0.1324 0.2522 -0.21983 2020 11 22 59175 0.1305 0.2521 -0.22021 2020 11 23 59176 0.1285 0.2521 -0.22074 2020 11 24 59177 0.1266 0.2521 -0.22135 2020 11 25 59178 0.1247 0.2521 -0.22205 2020 11 26 59179 0.1228 0.2522 -0.22280 2020 11 27 59180 0.1209 0.2523 -0.22355 2020 11 28 59181 0.1190 0.2524 -0.22416 2020 11 29 59182 0.1171 0.2526 -0.22463 2020 11 30 59183 0.1152 0.2528 -0.22491 2020 12 1 59184 0.1133 0.2530 -0.22503 2020 12 2 59185 0.1114 0.2532 -0.22503 2020 12 3 59186 0.1095 0.2535 -0.22501 2020 12 4 59187 0.1076 0.2538 -0.22501 2020 12 5 59188 0.1057 0.2541 -0.22518 2020 12 6 59189 0.1038 0.2545 -0.22547 2020 12 7 59190 0.1019 0.2549 -0.22591 2020 12 8 59191 0.1000 0.2553 -0.22656 2020 12 9 59192 0.0982 0.2557 -0.22748 2020 12 10 59193 0.0963 0.2562 -0.22856 2020 12 11 59194 0.0944 0.2567 -0.22969 2020 12 12 59195 0.0926 0.2572 -0.23078 2020 12 13 59196 0.0908 0.2578 -0.23169 2020 12 14 59197 0.0889 0.2584 -0.23235 2020 12 15 59198 0.0871 0.2590 -0.23276 2020 12 16 59199 0.0853 0.2596 -0.23300 2020 12 17 59200 0.0835 0.2603 -0.23317 2020 12 18 59201 0.0817 0.2610 -0.23337 2020 12 19 59202 0.0800 0.2618 -0.23367 2020 12 20 59203 0.0782 0.2625 -0.23409 2020 12 21 59204 0.0765 0.2633 -0.23463 2020 12 22 59205 0.0747 0.2641 -0.23522 2020 12 23 59206 0.0730 0.2649 -0.23587 2020 12 24 59207 0.0713 0.2658 -0.23649 2020 12 25 59208 0.0696 0.2667 -0.23697 2020 12 26 59209 0.0679 0.2676 -0.23734 2020 12 27 59210 0.0663 0.2686 -0.23759 2020 12 28 59211 0.0646 0.2695 -0.23769 2020 12 29 59212 0.0630 0.2705 -0.23762 2020 12 30 59213 0.0614 0.2715 -0.23751 2020 12 31 59214 0.0598 0.2726 -0.23747 2021 1 1 59215 0.0583 0.2737 -0.23744 2021 1 2 59216 0.0567 0.2748 -0.23754 2021 1 3 59217 0.0552 0.2759 -0.23779 2021 1 4 59218 0.0537 0.2770 -0.23825 2021 1 5 59219 0.0522 0.2782 -0.23885 2021 1 6 59220 0.0507 0.2794 -0.23960 2021 1 7 59221 0.0493 0.2806 -0.24044 2021 1 8 59222 0.0478 0.2818 -0.24127 2021 1 9 59223 0.0464 0.2831 -0.24197 2021 1 10 59224 0.0451 0.2843 -0.24247 2021 1 11 59225 0.0437 0.2856 -0.24273 2021 1 12 59226 0.0424 0.2870 -0.24281 2021 1 13 59227 0.0411 0.2883 -0.24283 2021 1 14 59228 0.0398 0.2897 -0.24294 2021 1 15 59229 0.0385 0.2911 -0.24312 2021 1 16 59230 0.0373 0.2925 -0.24342 2021 1 17 59231 0.0361 0.2939 -0.24388 2021 1 18 59232 0.0349 0.2953 -0.24452 2021 1 19 59233 0.0337 0.2968 -0.24528 2021 1 20 59234 0.0326 0.2982 -0.24603 2021 1 21 59235 0.0315 0.2997 -0.24673 2021 1 22 59236 0.0304 0.3012 -0.24735 2021 1 23 59237 0.0294 0.3028 -0.24783 2021 1 24 59238 0.0284 0.3043 -0.24821 2021 1 25 59239 0.0274 0.3059 -0.24851 2021 1 26 59240 0.0264 0.3075 -0.24878 2021 1 27 59241 0.0255 0.3090 -0.24907 2021 1 28 59242 0.0246 0.3106 -0.24941 2021 1 29 59243 0.0237 0.3123 -0.24993 2021 1 30 59244 0.0229 0.3139 -0.25066 2021 1 31 59245 0.0221 0.3155 -0.25160 2021 2 1 59246 0.0213 0.3172 -0.25276 2021 2 2 59247 0.0205 0.3189 -0.25406 2021 2 3 59248 0.0198 0.3206 -0.25537 2021 2 4 59249 0.0191 0.3222 -0.25661 2021 2 5 59250 0.0185 0.3240 -0.25774 2021 2 6 59251 0.0178 0.3257 -0.25865 2021 2 7 59252 0.0172 0.3274 -0.25932 2021 2 8 59253 0.0167 0.3291 -0.25982 2021 2 9 59254 0.0162 0.3309 -0.26023 2021 2 10 59255 0.0157 0.3326 -0.26064 2021 2 11 59256 0.0152 0.3344 -0.26114 2021 2 12 59257 0.0148 0.3362 -0.26182 2021 2 13 59258 0.0144 0.3379 -0.26269 2021 2 14 59259 0.0140 0.3397 -0.26373 2021 2 15 59260 0.0137 0.3415 -0.26485 2021 2 16 59261 0.0134 0.3433 -0.26595 2021 2 17 59262 0.0131 0.3451 -0.26701 2021 2 18 59263 0.0129 0.3469 -0.26801 2021 2 19 59264 0.0127 0.3487 -0.26884 2021 2 20 59265 0.0125 0.3505 -0.26954 2021 2 21 59266 0.0124 0.3523 -0.27011 2021 2 22 59267 0.0123 0.3541 -0.27056 2021 2 23 59268 0.0122 0.3559 -0.27101 2021 2 24 59269 0.0122 0.3578 -0.27150 2021 2 25 59270 0.0122 0.3596 -0.27212 2021 2 26 59271 0.0123 0.3614 -0.27297 2021 2 27 59272 0.0123 0.3632 -0.27407 2021 2 28 59273 0.0125 0.3650 -0.27541 2021 3 1 59274 0.0126 0.3669 -0.27692 2021 3 2 59275 0.0128 0.3687 -0.27853 2021 3 3 59276 0.0130 0.3705 -0.28013 2021 3 4 59277 0.0132 0.3723 -0.28157 2021 3 5 59278 0.0135 0.3741 -0.28285 2021 3 6 59279 0.0138 0.3759 -0.28391 2021 3 7 59280 0.0142 0.3777 -0.28473 2021 3 8 59281 0.0146 0.3795 -0.28541 2021 3 9 59282 0.0150 0.3813 -0.28602 2021 3 10 59283 0.0154 0.3831 -0.28669 2021 3 11 59284 0.0159 0.3848 -0.28751 2021 3 12 59285 0.0164 0.3866 -0.28849 2021 3 13 59286 0.0170 0.3884 -0.28963 2021 3 14 59287 0.0176 0.3901 -0.29088 2021 3 15 59288 0.0182 0.3918 -0.29212 2021 3 16 59289 0.0189 0.3936 -0.29333 2021 3 17 59290 0.0195 0.3953 -0.29443 2021 3 18 59291 0.0203 0.3970 -0.29537 2021 3 19 59292 0.0210 0.3987 -0.29619 2021 3 20 59293 0.0218 0.4004 -0.29693 2021 3 21 59294 0.0226 0.4021 -0.29760 2021 3 22 59295 0.0235 0.4038 -0.29817 2021 3 23 59296 0.0243 0.4054 -0.29869 2021 3 24 59297 0.0252 0.4071 -0.29924 2021 3 25 59298 0.0262 0.4087 -0.29999 2021 3 26 59299 0.0272 0.4103 -0.30098 2021 3 27 59300 0.0282 0.4119 -0.30220 2021 3 28 59301 0.0292 0.4135 -0.30364 2021 3 29 59302 0.0303 0.4151 -0.30518 2021 3 30 59303 0.0314 0.4166 -0.30672 2021 3 31 59304 0.0325 0.4182 -0.30814 2021 4 1 59305 0.0336 0.4197 -0.30935 2021 4 2 59306 0.0348 0.4212 -0.31028 These predictions are based on all announced leap seconds. IERS Celestial Pole Offset Final Series MJD dpsi deps (msec. of arc) 58881 -107.9 -6.8 58882 -108.0 -6.7 58883 -108.1 -6.6 58884 -108.3 -6.5 58885 -108.6 -6.7 58886 -108.9 -7.1 58887 -108.9 -7.6 58888 -108.4 -7.8 58889 -107.6 -7.6 58890 -107.0 -7.3 58891 -107.0 -7.1 58892 -107.5 -7.1 58893 -108.0 -7.2 58894 -108.3 -7.2 58895 -108.5 -7.3 58896 -108.7 -7.4 58897 -108.8 -7.4 58898 -108.5 -7.4 58899 -107.9 -7.5 58900 -107.3 -7.6 58901 -107.1 -7.7 58902 -107.4 -7.7 58903 -107.8 -7.5 58904 -108.2 -7.4 58905 -108.3 -7.5 58906 -108.2 -7.7 58907 -108.0 -7.8 58908 -107.7 -7.9 58909 -107.6 -8.0 IAU2000A Celestial Pole Offset Final Series MJD dX dY (msec. of arc) 58881 0.24 0.05 58882 0.26 0.07 58883 0.29 0.09 58884 0.29 0.07 58885 0.29 0.05 58886 0.29 0.03 58887 0.27 0.00 58888 0.24 -0.03 58889 0.21 -0.06 58890 0.17 -0.09 58891 0.15 -0.07 58892 0.14 -0.03 58893 0.12 0.01 58894 0.09 0.02 58895 0.06 0.01 58896 0.04 -0.01 58897 0.01 -0.02 58898 0.10 -0.00 58899 0.22 0.02 58900 0.34 0.04 58901 0.29 0.07 58902 0.18 0.09 58903 0.07 0.11 58904 -0.04 0.13 58905 -0.05 0.11 58906 -0.04 0.07 58907 -0.02 0.03 58908 0.00 0.01 58909 0.03 0.00 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).