********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 7 May 2020 Vol. XXXIII No. 019 ______________________________________________________________________ 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 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. * * * * 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 5 1 58970 0.07585 .00009 0.43580 .00009 -0.242462 0.000020 20 5 2 58971 0.07766 .00009 0.43693 .00009 -0.242917 0.000017 20 5 3 58972 0.07963 .00009 0.43811 .00009 -0.243643 0.000014 20 5 4 58973 0.08144 .00009 0.43929 .00009 -0.244592 0.000010 20 5 5 58974 0.08296 .00009 0.44037 .00009 -0.245673 0.000010 20 5 6 58975 0.08437 .00009 0.44132 .00009 -0.246760 0.000010 20 5 7 58976 0.08589 .00009 0.44219 .00009 -0.247783 0.000055 IERS Final Values MJD x y UT1-UTC " " s 20 3 2 58910 0.0271 0.3572 -0.20559 20 3 3 58911 0.0264 0.3590 -0.20616 20 3 4 58912 0.0260 0.3607 -0.20668 20 3 5 58913 0.0263 0.3620 -0.20717 20 3 6 58914 0.0270 0.3639 -0.20770 20 3 7 58915 0.0277 0.3657 -0.20836 20 3 8 58916 0.0282 0.3674 -0.20923 20 3 9 58917 0.0281 0.3691 -0.21035 20 3 10 58918 0.0282 0.3707 -0.21172 20 3 11 58919 0.0287 0.3723 -0.21323 20 3 12 58920 0.0292 0.3738 -0.21475 20 3 13 58921 0.0304 0.3755 -0.21614 20 3 14 58922 0.0318 0.3775 -0.21729 20 3 15 58923 0.0332 0.3795 -0.21818 20 3 16 58924 0.0342 0.3809 -0.21882 20 3 17 58925 0.0348 0.3822 -0.21929 20 3 18 58926 0.0355 0.3830 -0.21965 20 3 19 58927 0.0367 0.3840 -0.21996 20 3 20 58928 0.0387 0.3851 -0.22025 20 3 21 58929 0.0409 0.3860 -0.22057 20 3 22 58930 0.0428 0.3873 -0.22094 20 3 23 58931 0.0438 0.3886 -0.22140 20 3 24 58932 0.0446 0.3899 -0.22193 20 3 25 58933 0.0448 0.3914 -0.22250 20 3 26 58934 0.0444 0.3931 -0.22306 20 3 27 58935 0.0438 0.3941 -0.22358 20 3 28 58936 0.0447 0.3950 -0.22403 20 3 29 58937 0.0458 0.3965 -0.22440 20 3 30 58938 0.0471 0.3980 -0.22470 20 3 31 58939 0.0488 0.3997 -0.22495 20 4 1 58940 0.0509 0.4012 -0.22517 _______________________________________________________________________ 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 = 0.1232 - 0.0572 cos A + 0.0904 sin A + 0.0228 cos C + 0.0022 sin C y = 0.3552 + 0.0835 cos A + 0.0527 sin A + 0.0022 cos C - 0.0228 sin C UT1-UTC = -0.2130 - 0.00015 (MJD - 58984) - (UT2-UT1) where A = 2*pi*(MJD-58976)/365.25 and C = 2*pi*(MJD-58976)/435. TAI-UTC(MJD 58977) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58976)**0.80 S t = 0.00025 (MJD-58976)**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 5 8 58977 0.0875 0.4430 -0.24859 2020 5 9 58978 0.0892 0.4437 -0.24912 2020 5 10 58979 0.0911 0.4444 -0.24942 2020 5 11 58980 0.0930 0.4450 -0.24957 2020 5 12 58981 0.0948 0.4457 -0.24963 2020 5 13 58982 0.0967 0.4463 -0.24969 2020 5 14 58983 0.0984 0.4469 -0.24979 2020 5 15 58984 0.1002 0.4475 -0.24997 2020 5 16 58985 0.1019 0.4480 -0.25024 2020 5 17 58986 0.1037 0.4484 -0.25059 2020 5 18 58987 0.1055 0.4488 -0.25099 2020 5 19 58988 0.1073 0.4491 -0.25138 2020 5 20 58989 0.1092 0.4495 -0.25173 2020 5 21 58990 0.1110 0.4498 -0.25198 2020 5 22 58991 0.1128 0.4501 -0.25211 2020 5 23 58992 0.1146 0.4504 -0.25208 2020 5 24 58993 0.1164 0.4506 -0.25189 2020 5 25 58994 0.1182 0.4507 -0.25156 2020 5 26 58995 0.1201 0.4509 -0.25112 2020 5 27 58996 0.1219 0.4510 -0.25065 2020 5 28 58997 0.1238 0.4510 -0.25025 2020 5 29 58998 0.1256 0.4511 -0.24999 2020 5 30 58999 0.1275 0.4511 -0.24993 2020 5 31 59000 0.1293 0.4512 -0.25008 2020 6 1 59001 0.1312 0.4511 -0.25043 2020 6 2 59002 0.1330 0.4511 -0.25088 2020 6 3 59003 0.1349 0.4510 -0.25130 2020 6 4 59004 0.1368 0.4509 -0.25156 2020 6 5 59005 0.1386 0.4507 -0.25158 2020 6 6 59006 0.1405 0.4506 -0.25133 2020 6 7 59007 0.1423 0.4504 -0.25087 2020 6 8 59008 0.1442 0.4502 -0.25027 2020 6 9 59009 0.1461 0.4499 -0.24960 2020 6 10 59010 0.1479 0.4496 -0.24896 2020 6 11 59011 0.1497 0.4493 -0.24838 2020 6 12 59012 0.1516 0.4490 -0.24788 2020 6 13 59013 0.1534 0.4486 -0.24747 2020 6 14 59014 0.1553 0.4482 -0.24714 2020 6 15 59015 0.1571 0.4478 -0.24684 2020 6 16 59016 0.1589 0.4473 -0.24654 2020 6 17 59017 0.1607 0.4469 -0.24619 2020 6 18 59018 0.1625 0.4464 -0.24576 2020 6 19 59019 0.1643 0.4458 -0.24520 2020 6 20 59020 0.1661 0.4452 -0.24453 2020 6 21 59021 0.1678 0.4446 -0.24373 2020 6 22 59022 0.1696 0.4440 -0.24286 2020 6 23 59023 0.1713 0.4434 -0.24198 2020 6 24 59024 0.1731 0.4427 -0.24118 2020 6 25 59025 0.1748 0.4420 -0.24053 2020 6 26 59026 0.1765 0.4412 -0.24009 2020 6 27 59027 0.1782 0.4405 -0.23985 2020 6 28 59028 0.1799 0.4397 -0.23977 2020 6 29 59029 0.1816 0.4389 -0.23977 2020 6 30 59030 0.1832 0.4380 -0.23974 2020 7 1 59031 0.1849 0.4371 -0.23958 2020 7 2 59032 0.1865 0.4362 -0.23922 2020 7 3 59033 0.1881 0.4353 -0.23863 2020 7 4 59034 0.1897 0.4344 -0.23783 2020 7 5 59035 0.1912 0.4334 -0.23690 2020 7 6 59036 0.1928 0.4324 -0.23592 2020 7 7 59037 0.1943 0.4313 -0.23498 2020 7 8 59038 0.1959 0.4303 -0.23413 2020 7 9 59039 0.1974 0.4292 -0.23340 2020 7 10 59040 0.1988 0.4281 -0.23280 2020 7 11 59041 0.2003 0.4270 -0.23230 2020 7 12 59042 0.2017 0.4258 -0.23186 2020 7 13 59043 0.2031 0.4247 -0.23144 2020 7 14 59044 0.2045 0.4235 -0.23100 2020 7 15 59045 0.2059 0.4222 -0.23047 2020 7 16 59046 0.2072 0.4210 -0.22984 2020 7 17 59047 0.2086 0.4197 -0.22908 2020 7 18 59048 0.2099 0.4185 -0.22819 2020 7 19 59049 0.2112 0.4172 -0.22722 2020 7 20 59050 0.2124 0.4158 -0.22622 2020 7 21 59051 0.2136 0.4145 -0.22529 2020 7 22 59052 0.2148 0.4131 -0.22451 2020 7 23 59053 0.2160 0.4117 -0.22396 2020 7 24 59054 0.2172 0.4103 -0.22365 2020 7 25 59055 0.2183 0.4089 -0.22352 2020 7 26 59056 0.2194 0.4075 -0.22351 2020 7 27 59057 0.2205 0.4060 -0.22349 2020 7 28 59058 0.2215 0.4045 -0.22336 2020 7 29 59059 0.2225 0.4030 -0.22303 2020 7 30 59060 0.2235 0.4015 -0.22249 2020 7 31 59061 0.2245 0.4000 -0.22174 2020 8 1 59062 0.2254 0.3985 -0.22086 2020 8 2 59063 0.2263 0.3969 -0.21991 2020 8 3 59064 0.2272 0.3953 -0.21899 2020 8 4 59065 0.2281 0.3938 -0.21816 2020 8 5 59066 0.2289 0.3922 -0.21744 2020 8 6 59067 0.2297 0.3905 -0.21685 2020 8 7 59068 0.2304 0.3889 -0.21637 2020 8 8 59069 0.2312 0.3873 -0.21597 2020 8 9 59070 0.2318 0.3856 -0.21560 2020 8 10 59071 0.2325 0.3840 -0.21521 2020 8 11 59072 0.2331 0.3823 -0.21476 2020 8 12 59073 0.2337 0.3806 -0.21422 2020 8 13 59074 0.2343 0.3789 -0.21357 2020 8 14 59075 0.2349 0.3772 -0.21282 2020 8 15 59076 0.2354 0.3755 -0.21199 2020 8 16 59077 0.2358 0.3738 -0.21113 2020 8 17 59078 0.2363 0.3721 -0.21032 2020 8 18 59079 0.2367 0.3704 -0.20965 2020 8 19 59080 0.2371 0.3686 -0.20920 2020 8 20 59081 0.2374 0.3669 -0.20903 2020 8 21 59082 0.2377 0.3651 -0.20910 2020 8 22 59083 0.2380 0.3634 -0.20933 2020 8 23 59084 0.2383 0.3616 -0.20959 2020 8 24 59085 0.2385 0.3598 -0.20978 2020 8 25 59086 0.2386 0.3581 -0.20977 2020 8 26 59087 0.2388 0.3563 -0.20955 2020 8 27 59088 0.2389 0.3545 -0.20911 2020 8 28 59089 0.2390 0.3528 -0.20853 2020 8 29 59090 0.2390 0.3510 -0.20788 2020 8 30 59091 0.2390 0.3492 -0.20725 2020 8 31 59092 0.2390 0.3474 -0.20671 2020 9 1 59093 0.2390 0.3456 -0.20629 2020 9 2 59094 0.2389 0.3439 -0.20602 2020 9 3 59095 0.2387 0.3421 -0.20587 2020 9 4 59096 0.2386 0.3403 -0.20583 2020 9 5 59097 0.2384 0.3385 -0.20584 2020 9 6 59098 0.2382 0.3368 -0.20585 2020 9 7 59099 0.2379 0.3350 -0.20582 2020 9 8 59100 0.2376 0.3332 -0.20571 2020 9 9 59101 0.2373 0.3315 -0.20549 2020 9 10 59102 0.2369 0.3297 -0.20518 2020 9 11 59103 0.2365 0.3280 -0.20478 2020 9 12 59104 0.2361 0.3262 -0.20433 2020 9 13 59105 0.2356 0.3245 -0.20390 2020 9 14 59106 0.2352 0.3228 -0.20359 2020 9 15 59107 0.2346 0.3211 -0.20347 2020 9 16 59108 0.2341 0.3193 -0.20364 2020 9 17 59109 0.2335 0.3176 -0.20409 2020 9 18 59110 0.2329 0.3159 -0.20478 2020 9 19 59111 0.2322 0.3143 -0.20559 2020 9 20 59112 0.2315 0.3126 -0.20636 2020 9 21 59113 0.2308 0.3109 -0.20695 2020 9 22 59114 0.2300 0.3093 -0.20730 2020 9 23 59115 0.2293 0.3076 -0.20741 2020 9 24 59116 0.2284 0.3060 -0.20732 2020 9 25 59117 0.2276 0.3044 -0.20714 2020 9 26 59118 0.2267 0.3028 -0.20694 2020 9 27 59119 0.2258 0.3012 -0.20681 2020 9 28 59120 0.2249 0.2996 -0.20679 2020 9 29 59121 0.2239 0.2981 -0.20690 2020 9 30 59122 0.2229 0.2965 -0.20715 2020 10 1 59123 0.2219 0.2950 -0.20750 2020 10 2 59124 0.2208 0.2935 -0.20791 2020 10 3 59125 0.2197 0.2920 -0.20834 2020 10 4 59126 0.2186 0.2905 -0.20873 2020 10 5 59127 0.2175 0.2890 -0.20904 2020 10 6 59128 0.2163 0.2876 -0.20923 2020 10 7 59129 0.2151 0.2862 -0.20931 2020 10 8 59130 0.2139 0.2848 -0.20929 2020 10 9 59131 0.2126 0.2834 -0.20920 2020 10 10 59132 0.2114 0.2820 -0.20910 2020 10 11 59133 0.2100 0.2807 -0.20906 2020 10 12 59134 0.2087 0.2794 -0.20918 2020 10 13 59135 0.2074 0.2781 -0.20954 2020 10 14 59136 0.2060 0.2768 -0.21019 2020 10 15 59137 0.2046 0.2755 -0.21112 2020 10 16 59138 0.2031 0.2743 -0.21225 2020 10 17 59139 0.2017 0.2731 -0.21342 2020 10 18 59140 0.2002 0.2719 -0.21449 2020 10 19 59141 0.1987 0.2707 -0.21533 2020 10 20 59142 0.1972 0.2696 -0.21589 2020 10 21 59143 0.1956 0.2684 -0.21620 2020 10 22 59144 0.1940 0.2673 -0.21636 2020 10 23 59145 0.1924 0.2663 -0.21646 2020 10 24 59146 0.1908 0.2652 -0.21660 2020 10 25 59147 0.1892 0.2642 -0.21684 2020 10 26 59148 0.1875 0.2632 -0.21719 2020 10 27 59149 0.1859 0.2622 -0.21768 2020 10 28 59150 0.1842 0.2613 -0.21827 2020 10 29 59151 0.1824 0.2604 -0.21892 2020 10 30 59152 0.1807 0.2595 -0.21961 2020 10 31 59153 0.1790 0.2586 -0.22026 2020 11 1 59154 0.1772 0.2578 -0.22085 2020 11 2 59155 0.1754 0.2570 -0.22132 2020 11 3 59156 0.1736 0.2562 -0.22167 2020 11 4 59157 0.1718 0.2555 -0.22191 2020 11 5 59158 0.1700 0.2547 -0.22207 2020 11 6 59159 0.1681 0.2541 -0.22221 2020 11 7 59160 0.1663 0.2534 -0.22239 2020 11 8 59161 0.1644 0.2528 -0.22270 2020 11 9 59162 0.1625 0.2522 -0.22322 2020 11 10 59163 0.1606 0.2516 -0.22401 2020 11 11 59164 0.1587 0.2511 -0.22509 2020 11 12 59165 0.1568 0.2505 -0.22640 2020 11 13 59166 0.1549 0.2501 -0.22782 2020 11 14 59167 0.1529 0.2496 -0.22920 2020 11 15 59168 0.1510 0.2492 -0.23037 2020 11 16 59169 0.1490 0.2488 -0.23124 2020 11 17 59170 0.1471 0.2484 -0.23178 2020 11 18 59171 0.1451 0.2481 -0.23207 2020 11 19 59172 0.1431 0.2478 -0.23221 2020 11 20 59173 0.1411 0.2476 -0.23231 2020 11 21 59174 0.1391 0.2473 -0.23246 2020 11 22 59175 0.1371 0.2471 -0.23270 2020 11 23 59176 0.1351 0.2470 -0.23305 2020 11 24 59177 0.1331 0.2468 -0.23347 2020 11 25 59178 0.1311 0.2467 -0.23394 2020 11 26 59179 0.1291 0.2466 -0.23442 2020 11 27 59180 0.1271 0.2466 -0.23484 2020 11 28 59181 0.1250 0.2466 -0.23515 2020 11 29 59182 0.1230 0.2466 -0.23532 2020 11 30 59183 0.1210 0.2467 -0.23532 2020 12 1 59184 0.1190 0.2468 -0.23515 2020 12 2 59185 0.1169 0.2469 -0.23484 2020 12 3 59186 0.1149 0.2470 -0.23446 2020 12 4 59187 0.1129 0.2472 -0.23408 2020 12 5 59188 0.1109 0.2474 -0.23378 2020 12 6 59189 0.1089 0.2477 -0.23364 2020 12 7 59190 0.1069 0.2480 -0.23371 2020 12 8 59191 0.1049 0.2483 -0.23404 2020 12 9 59192 0.1029 0.2486 -0.23462 2020 12 10 59193 0.1009 0.2490 -0.23537 2020 12 11 59194 0.0989 0.2494 -0.23618 2020 12 12 59195 0.0969 0.2498 -0.23687 2020 12 13 59196 0.0949 0.2503 -0.23730 2020 12 14 59197 0.0929 0.2508 -0.23742 2020 12 15 59198 0.0910 0.2513 -0.23723 2020 12 16 59199 0.0890 0.2519 -0.23684 2020 12 17 59200 0.0871 0.2525 -0.23637 2020 12 18 59201 0.0852 0.2531 -0.23595 2020 12 19 59202 0.0832 0.2538 -0.23557 2020 12 20 59203 0.0813 0.2545 -0.23528 2020 12 21 59204 0.0794 0.2552 -0.23510 2020 12 22 59205 0.0775 0.2559 -0.23500 2020 12 23 59206 0.0757 0.2567 -0.23493 2020 12 24 59207 0.0738 0.2575 -0.23482 2020 12 25 59208 0.0720 0.2584 -0.23464 2020 12 26 59209 0.0701 0.2592 -0.23435 2020 12 27 59210 0.0683 0.2601 -0.23391 2020 12 28 59211 0.0665 0.2611 -0.23340 2020 12 29 59212 0.0647 0.2620 -0.23287 2020 12 30 59213 0.0630 0.2630 -0.23228 2020 12 31 59214 0.0612 0.2640 -0.23171 2021 1 1 59215 0.0595 0.2651 -0.23125 2021 1 2 59216 0.0578 0.2661 -0.23090 2021 1 3 59217 0.0561 0.2672 -0.23067 2021 1 4 59218 0.0544 0.2683 -0.23060 2021 1 5 59219 0.0527 0.2695 -0.23073 2021 1 6 59220 0.0511 0.2707 -0.23102 2021 1 7 59221 0.0495 0.2719 -0.23135 2021 1 8 59222 0.0479 0.2731 -0.23162 2021 1 9 59223 0.0463 0.2743 -0.23178 2021 1 10 59224 0.0448 0.2756 -0.23174 2021 1 11 59225 0.0432 0.2769 -0.23153 2021 1 12 59226 0.0417 0.2782 -0.23118 2021 1 13 59227 0.0403 0.2796 -0.23082 2021 1 14 59228 0.0388 0.2810 -0.23060 2021 1 15 59229 0.0374 0.2824 -0.23050 2021 1 16 59230 0.0360 0.2838 -0.23051 2021 1 17 59231 0.0346 0.2852 -0.23065 2021 1 18 59232 0.0332 0.2867 -0.23099 2021 1 19 59233 0.0319 0.2882 -0.23139 2021 1 20 59234 0.0306 0.2897 -0.23183 2021 1 21 59235 0.0294 0.2912 -0.23231 2021 1 22 59236 0.0281 0.2928 -0.23268 2021 1 23 59237 0.0269 0.2943 -0.23296 2021 1 24 59238 0.0257 0.2959 -0.23314 2021 1 25 59239 0.0245 0.2975 -0.23319 2021 1 26 59240 0.0234 0.2991 -0.23309 2021 1 27 59241 0.0223 0.3008 -0.23300 2021 1 28 59242 0.0212 0.3024 -0.23290 2021 1 29 59243 0.0202 0.3041 -0.23289 2021 1 30 59244 0.0192 0.3058 -0.23311 2021 1 31 59245 0.0182 0.3075 -0.23360 2021 2 1 59246 0.0173 0.3093 -0.23435 2021 2 2 59247 0.0163 0.3110 -0.23526 2021 2 3 59248 0.0155 0.3127 -0.23624 2021 2 4 59249 0.0146 0.3145 -0.23722 2021 2 5 59250 0.0138 0.3163 -0.23807 2021 2 6 59251 0.0130 0.3181 -0.23866 2021 2 7 59252 0.0122 0.3199 -0.23899 2021 2 8 59253 0.0115 0.3217 -0.23913 2021 2 9 59254 0.0108 0.3236 -0.23916 2021 2 10 59255 0.0102 0.3254 -0.23921 2021 2 11 59256 0.0096 0.3273 -0.23942 2021 2 12 59257 0.0090 0.3291 -0.23979 2021 2 13 59258 0.0084 0.3310 -0.24042 2021 2 14 59259 0.0079 0.3329 -0.24116 2021 2 15 59260 0.0074 0.3348 -0.24192 2021 2 16 59261 0.0070 0.3367 -0.24268 2021 2 17 59262 0.0066 0.3386 -0.24348 2021 2 18 59263 0.0062 0.3405 -0.24419 2021 2 19 59264 0.0058 0.3424 -0.24480 2021 2 20 59265 0.0055 0.3444 -0.24536 2021 2 21 59266 0.0053 0.3463 -0.24582 2021 2 22 59267 0.0050 0.3482 -0.24619 2021 2 23 59268 0.0048 0.3502 -0.24649 2021 2 24 59269 0.0046 0.3521 -0.24680 2021 2 25 59270 0.0045 0.3541 -0.24719 2021 2 26 59271 0.0044 0.3560 -0.24776 2021 2 27 59272 0.0044 0.3580 -0.24859 2021 2 28 59273 0.0043 0.3599 -0.24968 2021 3 1 59274 0.0044 0.3619 -0.25100 2021 3 2 59275 0.0044 0.3638 -0.25241 2021 3 3 59276 0.0045 0.3658 -0.25381 2021 3 4 59277 0.0046 0.3677 -0.25507 2021 3 5 59278 0.0048 0.3697 -0.25602 2021 3 6 59279 0.0050 0.3716 -0.25672 2021 3 7 59280 0.0052 0.3736 -0.25724 2021 3 8 59281 0.0055 0.3755 -0.25766 2021 3 9 59282 0.0058 0.3775 -0.25800 2021 3 10 59283 0.0061 0.3794 -0.25847 2021 3 11 59284 0.0065 0.3813 -0.25915 2021 3 12 59285 0.0069 0.3833 -0.25996 2021 3 13 59286 0.0073 0.3852 -0.26089 2021 3 14 59287 0.0078 0.3871 -0.26188 2021 3 15 59288 0.0083 0.3890 -0.26290 2021 3 16 59289 0.0089 0.3909 -0.26383 2021 3 17 59290 0.0095 0.3928 -0.26470 2021 3 18 59291 0.0101 0.3947 -0.26550 2021 3 19 59292 0.0107 0.3965 -0.26620 2021 3 20 59293 0.0114 0.3984 -0.26680 2021 3 21 59294 0.0122 0.4002 -0.26730 2021 3 22 59295 0.0129 0.4021 -0.26770 2021 3 23 59296 0.0137 0.4039 -0.26808 2021 3 24 59297 0.0145 0.4057 -0.26853 2021 3 25 59298 0.0154 0.4075 -0.26918 2021 3 26 59299 0.0163 0.4093 -0.27004 2021 3 27 59300 0.0172 0.4111 -0.27116 2021 3 28 59301 0.0182 0.4128 -0.27256 2021 3 29 59302 0.0192 0.4146 -0.27423 2021 3 30 59303 0.0202 0.4163 -0.27599 2021 3 31 59304 0.0213 0.4180 -0.27763 2021 4 1 59305 0.0224 0.4197 -0.27905 2021 4 2 59306 0.0235 0.4214 -0.28019 2021 4 3 59307 0.0246 0.4230 -0.28106 2021 4 4 59308 0.0258 0.4247 -0.28181 2021 4 5 59309 0.0270 0.4263 -0.28254 2021 4 6 59310 0.0283 0.4279 -0.28336 2021 4 7 59311 0.0296 0.4295 -0.28436 2021 4 8 59312 0.0309 0.4311 -0.28548 2021 4 9 59313 0.0322 0.4326 -0.28678 2021 4 10 59314 0.0336 0.4341 -0.28819 2021 4 11 59315 0.0350 0.4356 -0.28962 2021 4 12 59316 0.0364 0.4371 -0.29102 2021 4 13 59317 0.0378 0.4386 -0.29234 2021 4 14 59318 0.0393 0.4400 -0.29348 2021 4 15 59319 0.0408 0.4414 -0.29447 2021 4 16 59320 0.0424 0.4428 -0.29533 2021 4 17 59321 0.0439 0.4442 -0.29604 2021 4 18 59322 0.0455 0.4455 -0.29661 2021 4 19 59323 0.0471 0.4469 -0.29713 2021 4 20 59324 0.0487 0.4482 -0.29766 2021 4 21 59325 0.0504 0.4494 -0.29828 2021 4 22 59326 0.0521 0.4507 -0.29907 2021 4 23 59327 0.0538 0.4519 -0.30013 2021 4 24 59328 0.0555 0.4531 -0.30151 2021 4 25 59329 0.0573 0.4542 -0.30315 2021 4 26 59330 0.0590 0.4554 -0.30489 2021 4 27 59331 0.0608 0.4565 -0.30655 2021 4 28 59332 0.0627 0.4576 -0.30801 2021 4 29 59333 0.0645 0.4586 -0.30921 2021 4 30 59334 0.0663 0.4596 -0.31006 2021 5 1 59335 0.0682 0.4606 -0.31069 2021 5 2 59336 0.0701 0.4616 -0.31121 2021 5 3 59337 0.0720 0.4625 -0.31170 2021 5 4 59338 0.0740 0.4634 -0.31231 2021 5 5 59339 0.0759 0.4643 -0.31307 2021 5 6 59340 0.0779 0.4652 -0.31395 2021 5 7 59341 0.0799 0.4660 -0.31496 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) 58955 -105.86 0.31 -10.40 0.14 58956 -105.58 0.31 -10.25 0.14 58957 -105.10 0.31 -10.10 0.14 58958 -104.75 0.33 -9.92 0.14 58959 -104.78 0.33 -9.66 0.14 58960 -105.07 0.33 -9.40 0.18 IERS Celestial Pole Offset Final Series MJD dpsi deps (msec. of arc) 58910 -107.6 -8.1 58911 -107.7 -8.2 58912 -107.7 -8.2 58913 -107.8 -8.2 58914 -108.1 -8.4 58915 -108.3 -8.9 58916 -108.0 -9.3 58917 -107.1 -9.2 58918 -106.5 -8.9 58919 -106.4 -8.6 58920 -106.8 -8.5 58921 -107.2 -8.6 58922 -107.4 -8.6 58923 -107.3 -8.7 58924 -107.3 -8.8 58925 -107.4 -8.9 58926 -107.5 -9.1 58927 -107.5 -9.2 58928 -107.2 -9.3 58929 -106.7 -9.3 58930 -106.5 -9.2 58931 -106.5 -8.9 58932 -106.6 -8.7 58933 -106.8 -8.6 58934 -106.9 -8.7 58935 -106.8 -8.9 58936 -106.6 -9.0 58937 -106.5 -9.2 58938 -106.6 -9.5 58939 -106.6 -9.7 58940 -106.5 -9.8 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 58955 0.115 0.124 -0.048 0.138 58956 0.165 0.124 -0.064 0.138 58957 0.194 0.124 -0.064 0.138 58958 0.199 0.130 -0.045 0.137 58959 0.188 0.130 -0.013 0.137 58960 0.168 0.130 0.026 0.176 IAU2000A Celestial Pole Offset Final Series MJD dX dY (msec. of arc) 58910 0.06 -0.01 58911 0.09 -0.03 58912 0.09 -0.01 58913 0.08 0.03 58914 0.07 0.06 58915 0.05 0.05 58916 0.02 0.03 58917 -0.02 0.00 58918 -0.05 -0.02 58919 -0.01 0.00 58920 0.04 0.03 58921 0.10 0.07 58922 0.09 0.11 58923 0.06 0.16 58924 0.03 0.21 58925 -0.01 0.26 58926 -0.01 0.15 58927 -0.02 0.01 58928 -0.02 -0.14 58929 -0.01 -0.16 58930 -0.01 -0.13 58931 -0.00 -0.10 58932 0.00 -0.06 58933 -0.03 -0.02 58934 -0.06 0.02 58935 -0.10 0.07 58936 -0.09 0.07 58937 -0.07 0.05 58938 -0.04 0.04 58939 -0.01 0.02 58940 -0.02 -0.01 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).