********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 22 October 2020 Vol. XXXIII No. 043 ______________________________________________________________________ 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 10 16 59138 0.17789 .00009 0.30885 .00009 -0.170619 0.000011 20 10 17 59139 0.17778 .00009 0.30816 .00009 -0.171437 0.000011 20 10 18 59140 0.17772 .00009 0.30742 .00009 -0.172209 0.000013 20 10 19 59141 0.17709 .00009 0.30658 .00009 -0.172748 0.000012 20 10 20 59142 0.17585 .00009 0.30562 .00009 -0.173022 0.000011 20 10 21 59143 0.17448 .00009 0.30475 .00009 -0.173099 0.000012 20 10 22 59144 0.17323 .00009 0.30395 .00009 -0.173089 0.000055 _______________________________________________________________________ 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 = 0.1198 + 0.0447 cos A - 0.0690 sin A + 0.0114 cos C + 0.0051 sin C y = 0.3597 - 0.0647 cos A - 0.0418 sin A + 0.0051 cos C - 0.0114 sin C UT1-UTC = -0.1766 - 0.00002 (MJD - 59152) - (UT2-UT1) where A = 2*pi*(MJD-59144)/365.25 and C = 2*pi*(MJD-59144)/435. TAI-UTC(MJD 59145) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59144)**0.80 S t = 0.00025 (MJD-59144)**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 10 23 59145 0.1721 0.3032 -0.17308 2020 10 24 59146 0.1710 0.3023 -0.17312 2020 10 25 59147 0.1700 0.3015 -0.17321 2020 10 26 59148 0.1690 0.3007 -0.17336 2020 10 27 59149 0.1679 0.3000 -0.17359 2020 10 28 59150 0.1667 0.2993 -0.17390 2020 10 29 59151 0.1655 0.2986 -0.17425 2020 10 30 59152 0.1642 0.2979 -0.17461 2020 10 31 59153 0.1630 0.2973 -0.17494 2020 11 1 59154 0.1618 0.2967 -0.17520 2020 11 2 59155 0.1605 0.2960 -0.17539 2020 11 3 59156 0.1593 0.2955 -0.17550 2020 11 4 59157 0.1580 0.2949 -0.17548 2020 11 5 59158 0.1567 0.2943 -0.17532 2020 11 6 59159 0.1554 0.2938 -0.17509 2020 11 7 59160 0.1540 0.2933 -0.17483 2020 11 8 59161 0.1527 0.2928 -0.17463 2020 11 9 59162 0.1514 0.2923 -0.17457 2020 11 10 59163 0.1500 0.2919 -0.17472 2020 11 11 59164 0.1486 0.2915 -0.17512 2020 11 12 59165 0.1472 0.2911 -0.17573 2020 11 13 59166 0.1458 0.2907 -0.17644 2020 11 14 59167 0.1444 0.2903 -0.17709 2020 11 15 59168 0.1430 0.2900 -0.17756 2020 11 16 59169 0.1416 0.2897 -0.17776 2020 11 17 59170 0.1402 0.2894 -0.17771 2020 11 18 59171 0.1387 0.2892 -0.17747 2020 11 19 59172 0.1373 0.2889 -0.17712 2020 11 20 59173 0.1358 0.2887 -0.17676 2020 11 21 59174 0.1344 0.2885 -0.17648 2020 11 22 59175 0.1329 0.2883 -0.17632 2020 11 23 59176 0.1315 0.2882 -0.17628 2020 11 24 59177 0.1300 0.2881 -0.17633 2020 11 25 59178 0.1285 0.2880 -0.17644 2020 11 26 59179 0.1270 0.2879 -0.17657 2020 11 27 59180 0.1256 0.2879 -0.17665 2020 11 28 59181 0.1241 0.2878 -0.17665 2020 11 29 59182 0.1226 0.2878 -0.17651 2020 11 30 59183 0.1211 0.2879 -0.17623 2020 12 1 59184 0.1196 0.2879 -0.17579 2020 12 2 59185 0.1181 0.2880 -0.17524 2020 12 3 59186 0.1166 0.2881 -0.17463 2020 12 4 59187 0.1151 0.2882 -0.17402 2020 12 5 59188 0.1136 0.2884 -0.17348 2020 12 6 59189 0.1122 0.2885 -0.17310 2020 12 7 59190 0.1107 0.2887 -0.17293 2020 12 8 59191 0.1092 0.2890 -0.17300 2020 12 9 59192 0.1077 0.2892 -0.17330 2020 12 10 59193 0.1062 0.2895 -0.17377 2020 12 11 59194 0.1048 0.2898 -0.17429 2020 12 12 59195 0.1033 0.2901 -0.17472 2020 12 13 59196 0.1018 0.2904 -0.17497 2020 12 14 59197 0.1004 0.2908 -0.17498 2020 12 15 59198 0.0989 0.2912 -0.17476 2020 12 16 59199 0.0975 0.2916 -0.17440 2020 12 17 59200 0.0960 0.2920 -0.17400 2020 12 18 59201 0.0946 0.2925 -0.17364 2020 12 19 59202 0.0932 0.2930 -0.17338 2020 12 20 59203 0.0917 0.2935 -0.17325 2020 12 21 59204 0.0903 0.2940 -0.17322 2020 12 22 59205 0.0889 0.2946 -0.17326 2020 12 23 59206 0.0875 0.2952 -0.17332 2020 12 24 59207 0.0862 0.2958 -0.17335 2020 12 25 59208 0.0848 0.2964 -0.17331 2020 12 26 59209 0.0834 0.2970 -0.17316 2020 12 27 59210 0.0821 0.2977 -0.17288 2020 12 28 59211 0.0807 0.2984 -0.17247 2020 12 29 59212 0.0794 0.2991 -0.17193 2020 12 30 59213 0.0781 0.2998 -0.17131 2020 12 31 59214 0.0768 0.3006 -0.17068 2021 1 1 59215 0.0755 0.3014 -0.17011 2021 1 2 59216 0.0742 0.3022 -0.16968 2021 1 3 59217 0.0730 0.3030 -0.16944 2021 1 4 59218 0.0717 0.3038 -0.16943 2021 1 5 59219 0.0705 0.3047 -0.16963 2021 1 6 59220 0.0693 0.3056 -0.16997 2021 1 7 59221 0.0681 0.3065 -0.17037 2021 1 8 59222 0.0669 0.3074 -0.17071 2021 1 9 59223 0.0658 0.3084 -0.17089 2021 1 10 59224 0.0646 0.3093 -0.17085 2021 1 11 59225 0.0635 0.3103 -0.17061 2021 1 12 59226 0.0624 0.3113 -0.17022 2021 1 13 59227 0.0613 0.3123 -0.16977 2021 1 14 59228 0.0602 0.3134 -0.16938 2021 1 15 59229 0.0592 0.3144 -0.16909 2021 1 16 59230 0.0582 0.3155 -0.16896 2021 1 17 59231 0.0571 0.3166 -0.16897 2021 1 18 59232 0.0562 0.3177 -0.16909 2021 1 19 59233 0.0552 0.3188 -0.16927 2021 1 20 59234 0.0542 0.3200 -0.16946 2021 1 21 59235 0.0533 0.3211 -0.16960 2021 1 22 59236 0.0524 0.3223 -0.16967 2021 1 23 59237 0.0515 0.3235 -0.16962 2021 1 24 59238 0.0507 0.3247 -0.16945 2021 1 25 59239 0.0498 0.3259 -0.16917 2021 1 26 59240 0.0490 0.3272 -0.16881 2021 1 27 59241 0.0482 0.3284 -0.16843 2021 1 28 59242 0.0474 0.3297 -0.16810 2021 1 29 59243 0.0467 0.3309 -0.16791 2021 1 30 59244 0.0460 0.3322 -0.16792 2021 1 31 59245 0.0453 0.3335 -0.16818 2021 2 1 59246 0.0446 0.3349 -0.16867 2021 2 2 59247 0.0439 0.3362 -0.16932 2021 2 3 59248 0.0433 0.3375 -0.17003 2021 2 4 59249 0.0427 0.3389 -0.17068 2021 2 5 59250 0.0422 0.3402 -0.17119 2021 2 6 59251 0.0416 0.3416 -0.17148 2021 2 7 59252 0.0411 0.3430 -0.17157 2021 2 8 59253 0.0406 0.3444 -0.17139 2021 2 9 59254 0.0401 0.3458 -0.17114 2021 2 10 59255 0.0397 0.3472 -0.17091 2021 2 11 59256 0.0393 0.3486 -0.17078 2021 2 12 59257 0.0389 0.3500 -0.17081 2021 2 13 59258 0.0385 0.3514 -0.17099 2021 2 14 59259 0.0382 0.3529 -0.17130 2021 2 15 59260 0.0379 0.3543 -0.17169 2021 2 16 59261 0.0376 0.3558 -0.17210 2021 2 17 59262 0.0374 0.3572 -0.17248 2021 2 18 59263 0.0371 0.3587 -0.17278 2021 2 19 59264 0.0370 0.3601 -0.17297 2021 2 20 59265 0.0368 0.3616 -0.17302 2021 2 21 59266 0.0367 0.3631 -0.17296 2021 2 22 59267 0.0365 0.3645 -0.17280 2021 2 23 59268 0.0365 0.3660 -0.17259 2021 2 24 59269 0.0364 0.3675 -0.17241 2021 2 25 59270 0.0364 0.3690 -0.17235 2021 2 26 59271 0.0364 0.3705 -0.17248 2021 2 27 59272 0.0364 0.3720 -0.17287 2021 2 28 59273 0.0365 0.3734 -0.17353 2021 3 1 59274 0.0366 0.3749 -0.17441 2021 3 2 59275 0.0367 0.3764 -0.17539 2021 3 3 59276 0.0369 0.3779 -0.17635 2021 3 4 59277 0.0370 0.3794 -0.17715 2021 3 5 59278 0.0373 0.3809 -0.17774 2021 3 6 59279 0.0375 0.3824 -0.17808 2021 3 7 59280 0.0378 0.3838 -0.17824 2021 3 8 59281 0.0380 0.3853 -0.17829 2021 3 9 59282 0.0384 0.3868 -0.17834 2021 3 10 59283 0.0387 0.3882 -0.17846 2021 3 11 59284 0.0391 0.3897 -0.17873 2021 3 12 59285 0.0395 0.3912 -0.17915 2021 3 13 59286 0.0400 0.3926 -0.17973 2021 3 14 59287 0.0404 0.3941 -0.18040 2021 3 15 59288 0.0409 0.3955 -0.18112 2021 3 16 59289 0.0414 0.3970 -0.18182 2021 3 17 59290 0.0420 0.3984 -0.18245 2021 3 18 59291 0.0426 0.3998 -0.18297 2021 3 19 59292 0.0432 0.4012 -0.18335 2021 3 20 59293 0.0438 0.4026 -0.18360 2021 3 21 59294 0.0445 0.4040 -0.18373 2021 3 22 59295 0.0452 0.4054 -0.18379 2021 3 23 59296 0.0459 0.4068 -0.18385 2021 3 24 59297 0.0466 0.4081 -0.18397 2021 3 25 59298 0.0474 0.4095 -0.18425 2021 3 26 59299 0.0482 0.4108 -0.18477 2021 3 27 59300 0.0490 0.4122 -0.18558 2021 3 28 59301 0.0499 0.4135 -0.18665 2021 3 29 59302 0.0507 0.4148 -0.18789 2021 3 30 59303 0.0516 0.4161 -0.18917 2021 3 31 59304 0.0526 0.4174 -0.19033 2021 4 1 59305 0.0535 0.4187 -0.19126 2021 4 2 59306 0.0545 0.4199 -0.19192 2021 4 3 59307 0.0555 0.4212 -0.19233 2021 4 4 59308 0.0565 0.4224 -0.19258 2021 4 5 59309 0.0576 0.4236 -0.19278 2021 4 6 59310 0.0587 0.4248 -0.19303 2021 4 7 59311 0.0598 0.4260 -0.19338 2021 4 8 59312 0.0609 0.4272 -0.19387 2021 4 9 59313 0.0620 0.4283 -0.19449 2021 4 10 59314 0.0632 0.4294 -0.19522 2021 4 11 59315 0.0644 0.4305 -0.19600 2021 4 12 59316 0.0656 0.4316 -0.19677 2021 4 13 59317 0.0668 0.4327 -0.19747 2021 4 14 59318 0.0681 0.4338 -0.19805 2021 4 15 59319 0.0694 0.4348 -0.19849 2021 4 16 59320 0.0707 0.4358 -0.19876 2021 4 17 59321 0.0720 0.4369 -0.19888 2021 4 18 59322 0.0734 0.4378 -0.19889 2021 4 19 59323 0.0747 0.4388 -0.19885 2021 4 20 59324 0.0761 0.4397 -0.19883 2021 4 21 59325 0.0775 0.4407 -0.19889 2021 4 22 59326 0.0789 0.4416 -0.19914 2021 4 23 59327 0.0804 0.4424 -0.19962 2021 4 24 59328 0.0818 0.4433 -0.20036 2021 4 25 59329 0.0833 0.4441 -0.20131 2021 4 26 59330 0.0848 0.4449 -0.20236 2021 4 27 59331 0.0863 0.4457 -0.20337 2021 4 28 59332 0.0878 0.4465 -0.20418 2021 4 29 59333 0.0894 0.4473 -0.20473 2021 4 30 59334 0.0909 0.4480 -0.20502 2021 5 1 59335 0.0925 0.4487 -0.20515 2021 5 2 59336 0.0941 0.4493 -0.20523 2021 5 3 59337 0.0957 0.4500 -0.20538 2021 5 4 59338 0.0973 0.4506 -0.20566 2021 5 5 59339 0.0989 0.4512 -0.20609 2021 5 6 59340 0.1006 0.4518 -0.20665 2021 5 7 59341 0.1022 0.4524 -0.20729 2021 5 8 59342 0.1039 0.4529 -0.20794 2021 5 9 59343 0.1056 0.4534 -0.20855 2021 5 10 59344 0.1072 0.4539 -0.20904 2021 5 11 59345 0.1089 0.4543 -0.20936 2021 5 12 59346 0.1107 0.4547 -0.20949 2021 5 13 59347 0.1124 0.4551 -0.20941 2021 5 14 59348 0.1141 0.4555 -0.20915 2021 5 15 59349 0.1158 0.4559 -0.20875 2021 5 16 59350 0.1176 0.4562 -0.20827 2021 5 17 59351 0.1193 0.4565 -0.20781 2021 5 18 59352 0.1211 0.4567 -0.20745 2021 5 19 59353 0.1228 0.4570 -0.20727 2021 5 20 59354 0.1246 0.4572 -0.20736 2021 5 21 59355 0.1264 0.4574 -0.20773 2021 5 22 59356 0.1282 0.4575 -0.20838 2021 5 23 59357 0.1300 0.4577 -0.20920 2021 5 24 59358 0.1317 0.4578 -0.21005 2021 5 25 59359 0.1335 0.4578 -0.21076 2021 5 26 59360 0.1353 0.4579 -0.21120 2021 5 27 59361 0.1371 0.4579 -0.21131 2021 5 28 59362 0.1389 0.4579 -0.21110 2021 5 29 59363 0.1407 0.4579 -0.21069 2021 5 30 59364 0.1425 0.4578 -0.21020 2021 5 31 59365 0.1443 0.4577 -0.20971 2021 6 1 59366 0.1461 0.4576 -0.20928 2021 6 2 59367 0.1479 0.4574 -0.20893 2021 6 3 59368 0.1497 0.4573 -0.20865 2021 6 4 59369 0.1515 0.4571 -0.20839 2021 6 5 59370 0.1533 0.4568 -0.20809 2021 6 6 59371 0.1551 0.4566 -0.20775 2021 6 7 59372 0.1569 0.4563 -0.20732 2021 6 8 59373 0.1587 0.4560 -0.20678 2021 6 9 59374 0.1605 0.4557 -0.20605 2021 6 10 59375 0.1623 0.4553 -0.20520 2021 6 11 59376 0.1640 0.4549 -0.20431 2021 6 12 59377 0.1658 0.4545 -0.20336 2021 6 13 59378 0.1676 0.4540 -0.20244 2021 6 14 59379 0.1693 0.4535 -0.20164 2021 6 15 59380 0.1711 0.4530 -0.20097 2021 6 16 59381 0.1728 0.4525 -0.20047 2021 6 17 59382 0.1745 0.4520 -0.20021 2021 6 18 59383 0.1762 0.4514 -0.20018 2021 6 19 59384 0.1779 0.4508 -0.20030 2021 6 20 59385 0.1796 0.4501 -0.20056 2021 6 21 59386 0.1813 0.4495 -0.20081 2021 6 22 59387 0.1830 0.4488 -0.20086 2021 6 23 59388 0.1847 0.4481 -0.20065 2021 6 24 59389 0.1863 0.4473 -0.20024 2021 6 25 59390 0.1880 0.4465 -0.19969 2021 6 26 59391 0.1896 0.4458 -0.19903 2021 6 27 59392 0.1912 0.4449 -0.19839 2021 6 28 59393 0.1928 0.4441 -0.19786 2021 6 29 59394 0.1944 0.4432 -0.19743 2021 6 30 59395 0.1960 0.4423 -0.19712 2021 7 1 59396 0.1975 0.4414 -0.19687 2021 7 2 59397 0.1991 0.4405 -0.19661 2021 7 3 59398 0.2006 0.4395 -0.19629 2021 7 4 59399 0.2021 0.4385 -0.19588 2021 7 5 59400 0.2036 0.4375 -0.19534 2021 7 6 59401 0.2050 0.4365 -0.19469 2021 7 7 59402 0.2065 0.4354 -0.19392 2021 7 8 59403 0.2079 0.4343 -0.19301 2021 7 9 59404 0.2093 0.4332 -0.19191 2021 7 10 59405 0.2107 0.4321 -0.19066 2021 7 11 59406 0.2121 0.4310 -0.18941 2021 7 12 59407 0.2135 0.4298 -0.18826 2021 7 13 59408 0.2148 0.4286 -0.18724 2021 7 14 59409 0.2161 0.4274 -0.18644 2021 7 15 59410 0.2174 0.4262 -0.18583 2021 7 16 59411 0.2187 0.4249 -0.18538 2021 7 17 59412 0.2199 0.4236 -0.18506 2021 7 18 59413 0.2211 0.4224 -0.18479 2021 7 19 59414 0.2223 0.4210 -0.18445 2021 7 20 59415 0.2235 0.4197 -0.18393 2021 7 21 59416 0.2246 0.4184 -0.18316 2021 7 22 59417 0.2258 0.4170 -0.18217 2021 7 23 59418 0.2269 0.4156 -0.18109 2021 7 24 59419 0.2279 0.4142 -0.18011 2021 7 25 59420 0.2290 0.4128 -0.17927 2021 7 26 59421 0.2300 0.4114 -0.17861 2021 7 27 59422 0.2310 0.4099 -0.17815 2021 7 28 59423 0.2320 0.4085 -0.17784 2021 7 29 59424 0.2329 0.4070 -0.17761 2021 7 30 59425 0.2339 0.4055 -0.17742 2021 7 31 59426 0.2348 0.4040 -0.17722 2021 8 1 59427 0.2356 0.4024 -0.17699 2021 8 2 59428 0.2365 0.4009 -0.17666 2021 8 3 59429 0.2373 0.3994 -0.17619 2021 8 4 59430 0.2380 0.3978 -0.17560 2021 8 5 59431 0.2388 0.3962 -0.17492 2021 8 6 59432 0.2395 0.3946 -0.17418 2021 8 7 59433 0.2402 0.3930 -0.17350 2021 8 8 59434 0.2409 0.3914 -0.17295 2021 8 9 59435 0.2415 0.3898 -0.17264 2021 8 10 59436 0.2421 0.3882 -0.17257 2021 8 11 59437 0.2427 0.3865 -0.17271 2021 8 12 59438 0.2432 0.3849 -0.17298 2021 8 13 59439 0.2437 0.3832 -0.17329 2021 8 14 59440 0.2442 0.3815 -0.17345 2021 8 15 59441 0.2447 0.3799 -0.17341 2021 8 16 59442 0.2451 0.3782 -0.17314 2021 8 17 59443 0.2455 0.3765 -0.17261 2021 8 18 59444 0.2458 0.3748 -0.17186 2021 8 19 59445 0.2462 0.3731 -0.17095 2021 8 20 59446 0.2465 0.3714 -0.16998 2021 8 21 59447 0.2467 0.3697 -0.16911 2021 8 22 59448 0.2470 0.3679 -0.16844 2021 8 23 59449 0.2472 0.3662 -0.16800 2021 8 24 59450 0.2473 0.3645 -0.16777 2021 8 25 59451 0.2475 0.3628 -0.16776 2021 8 26 59452 0.2476 0.3610 -0.16787 2021 8 27 59453 0.2476 0.3593 -0.16791 2021 8 28 59454 0.2477 0.3576 -0.16788 2021 8 29 59455 0.2477 0.3558 -0.16776 2021 8 30 59456 0.2477 0.3541 -0.16750 2021 8 31 59457 0.2476 0.3524 -0.16711 2021 9 1 59458 0.2475 0.3506 -0.16660 2021 9 2 59459 0.2474 0.3489 -0.16604 2021 9 3 59460 0.2472 0.3472 -0.16549 2021 9 4 59461 0.2470 0.3454 -0.16503 2021 9 5 59462 0.2468 0.3437 -0.16471 2021 9 6 59463 0.2466 0.3420 -0.16461 2021 9 7 59464 0.2463 0.3403 -0.16475 2021 9 8 59465 0.2460 0.3385 -0.16508 2021 9 9 59466 0.2456 0.3368 -0.16550 2021 9 10 59467 0.2452 0.3351 -0.16589 2021 9 11 59468 0.2448 0.3334 -0.16618 2021 9 12 59469 0.2444 0.3317 -0.16622 2021 9 13 59470 0.2439 0.3300 -0.16596 2021 9 14 59471 0.2434 0.3283 -0.16551 2021 9 15 59472 0.2429 0.3267 -0.16495 2021 9 16 59473 0.2423 0.3250 -0.16440 2021 9 17 59474 0.2417 0.3233 -0.16394 2021 9 18 59475 0.2410 0.3217 -0.16363 2021 9 19 59476 0.2404 0.3200 -0.16351 2021 9 20 59477 0.2397 0.3184 -0.16357 2021 9 21 59478 0.2390 0.3168 -0.16383 2021 9 22 59479 0.2382 0.3152 -0.16420 2021 9 23 59480 0.2374 0.3136 -0.16456 2021 9 24 59481 0.2366 0.3120 -0.16480 2021 9 25 59482 0.2357 0.3104 -0.16490 2021 9 26 59483 0.2349 0.3088 -0.16486 2021 9 27 59484 0.2340 0.3073 -0.16472 2021 9 28 59485 0.2330 0.3058 -0.16448 2021 9 29 59486 0.2320 0.3042 -0.16416 2021 9 30 59487 0.2311 0.3027 -0.16381 2021 10 1 59488 0.2300 0.3012 -0.16354 2021 10 2 59489 0.2290 0.2998 -0.16338 2021 10 3 59490 0.2279 0.2983 -0.16337 2021 10 4 59491 0.2268 0.2969 -0.16356 2021 10 5 59492 0.2256 0.2954 -0.16405 2021 10 6 59493 0.2245 0.2940 -0.16480 2021 10 7 59494 0.2233 0.2926 -0.16563 2021 10 8 59495 0.2221 0.2912 -0.16641 2021 10 9 59496 0.2208 0.2899 -0.16705 2021 10 10 59497 0.2196 0.2885 -0.16743 2021 10 11 59498 0.2183 0.2872 -0.16749 2021 10 12 59499 0.2170 0.2859 -0.16738 2021 10 13 59500 0.2156 0.2847 -0.16723 2021 10 14 59501 0.2142 0.2834 -0.16719 2021 10 15 59502 0.2128 0.2822 -0.16739 2021 10 16 59503 0.2114 0.2809 -0.16775 2021 10 17 59504 0.2100 0.2797 -0.16829 2021 10 18 59505 0.2085 0.2786 -0.16895 2021 10 19 59506 0.2070 0.2774 -0.16969 2021 10 20 59507 0.2055 0.2763 -0.17045 2021 10 21 59508 0.2040 0.2752 -0.17112 2021 10 22 59509 0.2024 0.2741 -0.17163 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) 59125 -116.56 0.51 -8.62 0.03 59126 -116.37 0.24 -8.71 0.02 59127 -116.13 0.24 -8.85 0.02 59128 -115.97 0.15 -8.94 0.02 59129 -116.07 0.18 -9.04 0.02 59130 -116.40 0.18 -9.22 0.02 59131 -116.65 0.18 -9.38 0.02 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 59125 0.094 0.203 0.005 0.027 59126 0.090 0.097 0.008 0.018 59127 0.084 0.097 0.013 0.018 59128 0.080 0.058 0.017 0.015 59129 0.079 0.072 0.022 0.024 59130 0.081 0.072 0.028 0.024 59131 0.085 0.072 0.033 0.024 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).