********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 11 February 2021 Vol. XXXIV No. 006 ______________________________________________________________________ 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 at the end of June 2021 * * * * 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 Spring of 2021. 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. * * * * Updated EOPs may be available at NASA's * * Archive of Space Geodesy Data Earthdata HTTPS server at: * * https://cddis.nasa.gov/archive/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, * * unencrypted FTP service has been permanently discontinued at CDDIS. * * * * For other download options from CDDIS, such as FTP-SSL, * * please refer to: * * 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. * * * * As of Bulletin A Vol. XXXIV, No. 005, 11 Feb 2021, we have * * incorporated the new IVS Combination VLBI solution: ivs20r1X.eops. * * The effect appears to be less than 0.1 mas in polar motion and * * less than 10 us in UT1-UTC. * * * * 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 21 2 5 59250 0.04923 .00009 0.34564 .00009 -0.169268 0.000008 21 2 6 59251 0.04915 .00009 0.34698 .00009 -0.169526 0.000008 21 2 7 59252 0.04912 .00009 0.34839 .00009 -0.169575 0.000012 21 2 8 59253 0.04936 .00009 0.34987 .00009 -0.169467 0.000014 21 2 9 59254 0.04992 .00009 0.35131 .00009 -0.169322 0.000014 21 2 10 59255 0.05057 .00009 0.35260 .00009 -0.169238 0.000015 21 2 11 59256 0.05117 .00009 0.35382 .00009 -0.169245 0.000017 IERS Final Values MJD x y UT1-UTC " " s 20 12 2 59185 0.1063 0.2876 -0.17872 20 12 3 59186 0.1046 0.2873 -0.17832 20 12 4 59187 0.1030 0.2877 -0.17792 20 12 5 59188 0.1013 0.2888 -0.17763 20 12 6 59189 0.0994 0.2896 -0.17754 20 12 7 59190 0.0974 0.2896 -0.17764 20 12 8 59191 0.0954 0.2897 -0.17796 20 12 9 59192 0.0933 0.2896 -0.17851 20 12 10 59193 0.0916 0.2893 -0.17913 20 12 11 59194 0.0904 0.2893 -0.17974 20 12 12 59195 0.0894 0.2899 -0.18019 20 12 13 59196 0.0881 0.2911 -0.18040 20 12 14 59197 0.0868 0.2921 -0.18037 20 12 15 59198 0.0854 0.2928 -0.18012 20 12 16 59199 0.0841 0.2933 -0.17970 20 12 17 59200 0.0829 0.2940 -0.17921 20 12 18 59201 0.0821 0.2946 -0.17877 20 12 19 59202 0.0813 0.2949 -0.17845 20 12 20 59203 0.0801 0.2953 -0.17831 20 12 21 59204 0.0789 0.2955 -0.17829 20 12 22 59205 0.0778 0.2958 -0.17839 20 12 23 59206 0.0772 0.2960 -0.17856 20 12 24 59207 0.0770 0.2965 -0.17867 20 12 25 59208 0.0767 0.2973 -0.17866 20 12 26 59209 0.0760 0.2979 -0.17852 20 12 27 59210 0.0750 0.2987 -0.17822 20 12 28 59211 0.0740 0.2999 -0.17779 20 12 29 59212 0.0727 0.3016 -0.17724 20 12 30 59213 0.0712 0.3026 -0.17665 20 12 31 59214 0.0697 0.3031 -0.17600 21 1 1 59215 0.0687 0.3040 -0.17538 _______________________________________________________________________ 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 = 0.1305 - 0.1077 cos A - 0.0153 sin A + 0.0255 cos C + 0.0041 sin C y = 0.3653 - 0.0140 cos A + 0.0982 sin A + 0.0041 cos C - 0.0255 sin C UT1-UTC = -0.1683 + 0.00017 (MJD - 59264) - (UT2-UT1) where A = 2*pi*(MJD-59256)/365.25 and C = 2*pi*(MJD-59256)/435. TAI-UTC(MJD 59257) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59256)**0.80 S t = 0.00025 (MJD-59256)**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) 2021 2 12 59257 0.0516 0.3551 -0.16942 2021 2 13 59258 0.0519 0.3565 -0.16976 2021 2 14 59259 0.0520 0.3578 -0.17025 2021 2 15 59260 0.0521 0.3592 -0.17082 2021 2 16 59261 0.0521 0.3605 -0.17138 2021 2 17 59262 0.0521 0.3617 -0.17186 2021 2 18 59263 0.0522 0.3629 -0.17221 2021 2 19 59264 0.0522 0.3641 -0.17242 2021 2 20 59265 0.0523 0.3653 -0.17251 2021 2 21 59266 0.0523 0.3666 -0.17253 2021 2 22 59267 0.0524 0.3678 -0.17249 2021 2 23 59268 0.0525 0.3690 -0.17243 2021 2 24 59269 0.0526 0.3703 -0.17238 2021 2 25 59270 0.0527 0.3715 -0.17243 2021 2 26 59271 0.0528 0.3727 -0.17266 2021 2 27 59272 0.0530 0.3738 -0.17312 2021 2 28 59273 0.0531 0.3750 -0.17385 2021 3 1 59274 0.0533 0.3763 -0.17475 2021 3 2 59275 0.0535 0.3775 -0.17573 2021 3 3 59276 0.0537 0.3787 -0.17663 2021 3 4 59277 0.0539 0.3799 -0.17735 2021 3 5 59278 0.0542 0.3811 -0.17782 2021 3 6 59279 0.0545 0.3823 -0.17802 2021 3 7 59280 0.0548 0.3835 -0.17801 2021 3 8 59281 0.0551 0.3847 -0.17786 2021 3 9 59282 0.0554 0.3859 -0.17770 2021 3 10 59283 0.0558 0.3871 -0.17760 2021 3 11 59284 0.0562 0.3883 -0.17765 2021 3 12 59285 0.0566 0.3895 -0.17784 2021 3 13 59286 0.0570 0.3906 -0.17817 2021 3 14 59287 0.0575 0.3918 -0.17859 2021 3 15 59288 0.0580 0.3930 -0.17905 2021 3 16 59289 0.0585 0.3942 -0.17950 2021 3 17 59290 0.0590 0.3953 -0.17987 2021 3 18 59291 0.0596 0.3965 -0.18014 2021 3 19 59292 0.0602 0.3976 -0.18026 2021 3 20 59293 0.0608 0.3988 -0.18026 2021 3 21 59294 0.0614 0.3999 -0.18014 2021 3 22 59295 0.0621 0.4011 -0.17996 2021 3 23 59296 0.0628 0.4022 -0.17977 2021 3 24 59297 0.0635 0.4033 -0.17965 2021 3 25 59298 0.0642 0.4044 -0.17968 2021 3 26 59299 0.0650 0.4055 -0.17995 2021 3 27 59300 0.0657 0.4066 -0.18050 2021 3 28 59301 0.0665 0.4077 -0.18133 2021 3 29 59302 0.0674 0.4088 -0.18234 2021 3 30 59303 0.0682 0.4099 -0.18339 2021 3 31 59304 0.0691 0.4109 -0.18432 2021 4 1 59305 0.0700 0.4120 -0.18502 2021 4 2 59306 0.0709 0.4130 -0.18544 2021 4 3 59307 0.0718 0.4140 -0.18563 2021 4 4 59308 0.0728 0.4150 -0.18565 2021 4 5 59309 0.0738 0.4160 -0.18562 2021 4 6 59310 0.0748 0.4170 -0.18563 2021 4 7 59311 0.0758 0.4180 -0.18575 2021 4 8 59312 0.0769 0.4189 -0.18600 2021 4 9 59313 0.0780 0.4199 -0.18638 2021 4 10 59314 0.0791 0.4208 -0.18687 2021 4 11 59315 0.0802 0.4217 -0.18741 2021 4 12 59316 0.0813 0.4226 -0.18794 2021 4 13 59317 0.0825 0.4235 -0.18840 2021 4 14 59318 0.0836 0.4244 -0.18875 2021 4 15 59319 0.0848 0.4252 -0.18895 2021 4 16 59320 0.0860 0.4260 -0.18899 2021 4 17 59321 0.0873 0.4269 -0.18889 2021 4 18 59322 0.0885 0.4277 -0.18869 2021 4 19 59323 0.0898 0.4284 -0.18844 2021 4 20 59324 0.0911 0.4292 -0.18823 2021 4 21 59325 0.0924 0.4300 -0.18812 2021 4 22 59326 0.0937 0.4307 -0.18819 2021 4 23 59327 0.0950 0.4314 -0.18851 2021 4 24 59328 0.0964 0.4321 -0.18910 2021 4 25 59329 0.0978 0.4328 -0.18990 2021 4 26 59330 0.0992 0.4334 -0.19080 2021 4 27 59331 0.1006 0.4341 -0.19166 2021 4 28 59332 0.1020 0.4347 -0.19230 2021 4 29 59333 0.1034 0.4353 -0.19266 2021 4 30 59334 0.1048 0.4358 -0.19273 2021 5 1 59335 0.1063 0.4364 -0.19256 2021 5 2 59336 0.1078 0.4369 -0.19228 2021 5 3 59337 0.1093 0.4374 -0.19199 2021 5 4 59338 0.1107 0.4379 -0.19178 2021 5 5 59339 0.1123 0.4384 -0.19169 2021 5 6 59340 0.1138 0.4388 -0.19172 2021 5 7 59341 0.1153 0.4392 -0.19184 2021 5 8 59342 0.1168 0.4396 -0.19201 2021 5 9 59343 0.1184 0.4400 -0.19217 2021 5 10 59344 0.1200 0.4404 -0.19226 2021 5 11 59345 0.1215 0.4407 -0.19224 2021 5 12 59346 0.1231 0.4410 -0.19206 2021 5 13 59347 0.1247 0.4413 -0.19171 2021 5 14 59348 0.1263 0.4416 -0.19119 2021 5 15 59349 0.1279 0.4418 -0.19053 2021 5 16 59350 0.1295 0.4420 -0.18979 2021 5 17 59351 0.1311 0.4422 -0.18903 2021 5 18 59352 0.1327 0.4424 -0.18833 2021 5 19 59353 0.1343 0.4425 -0.18777 2021 5 20 59354 0.1360 0.4426 -0.18741 2021 5 21 59355 0.1376 0.4427 -0.18729 2021 5 22 59356 0.1392 0.4428 -0.18740 2021 5 23 59357 0.1409 0.4428 -0.18767 2021 5 24 59358 0.1425 0.4429 -0.18797 2021 5 25 59359 0.1442 0.4429 -0.18816 2021 5 26 59360 0.1458 0.4428 -0.18811 2021 5 27 59361 0.1475 0.4428 -0.18777 2021 5 28 59362 0.1491 0.4427 -0.18719 2021 5 29 59363 0.1508 0.4426 -0.18645 2021 5 30 59364 0.1524 0.4425 -0.18568 2021 5 31 59365 0.1541 0.4423 -0.18498 2021 6 1 59366 0.1557 0.4421 -0.18440 2021 6 2 59367 0.1574 0.4419 -0.18394 2021 6 3 59368 0.1590 0.4417 -0.18357 2021 6 4 59369 0.1607 0.4414 -0.18325 2021 6 5 59370 0.1623 0.4412 -0.18291 2021 6 6 59371 0.1639 0.4408 -0.18252 2021 6 7 59372 0.1656 0.4405 -0.18202 2021 6 8 59373 0.1672 0.4402 -0.18137 2021 6 9 59374 0.1688 0.4398 -0.18055 2021 6 10 59375 0.1704 0.4394 -0.17956 2021 6 11 59376 0.1720 0.4390 -0.17842 2021 6 12 59377 0.1736 0.4385 -0.17720 2021 6 13 59378 0.1752 0.4380 -0.17594 2021 6 14 59379 0.1768 0.4375 -0.17473 2021 6 15 59380 0.1784 0.4370 -0.17363 2021 6 16 59381 0.1800 0.4364 -0.17271 2021 6 17 59382 0.1815 0.4359 -0.17199 2021 6 18 59383 0.1831 0.4353 -0.17149 2021 6 19 59384 0.1846 0.4346 -0.17116 2021 6 20 59385 0.1862 0.4340 -0.17090 2021 6 21 59386 0.1877 0.4333 -0.17059 2021 6 22 59387 0.1892 0.4326 -0.17012 2021 6 23 59388 0.1907 0.4319 -0.16939 2021 6 24 59389 0.1922 0.4311 -0.16840 2021 6 25 59390 0.1937 0.4304 -0.16723 2021 6 26 59391 0.1951 0.4296 -0.16598 2021 6 27 59392 0.1966 0.4288 -0.16477 2021 6 28 59393 0.1980 0.4279 -0.16368 2021 6 29 59394 0.1994 0.4271 -0.16274 2021 6 30 59395 0.2008 0.4262 -0.16192 2021 7 1 59396 0.2022 0.4253 -0.16117 2021 7 2 59397 0.2036 0.4244 -0.16044 2021 7 3 59398 0.2049 0.4234 -0.15967 2021 7 4 59399 0.2063 0.4224 -0.15880 2021 7 5 59400 0.2076 0.4214 -0.15779 2021 7 6 59401 0.2089 0.4204 -0.15664 2021 7 7 59402 0.2102 0.4194 -0.15532 2021 7 8 59403 0.2114 0.4183 -0.15386 2021 7 9 59404 0.2127 0.4173 -0.15231 2021 7 10 59405 0.2139 0.4162 -0.15073 2021 7 11 59406 0.2151 0.4151 -0.14919 2021 7 12 59407 0.2163 0.4139 -0.14776 2021 7 13 59408 0.2175 0.4128 -0.14651 2021 7 14 59409 0.2186 0.4116 -0.14548 2021 7 15 59410 0.2197 0.4104 -0.14466 2021 7 16 59411 0.2208 0.4092 -0.14402 2021 7 17 59412 0.2219 0.4080 -0.14347 2021 7 18 59413 0.2230 0.4067 -0.14291 2021 7 19 59414 0.2240 0.4055 -0.14223 2021 7 20 59415 0.2250 0.4042 -0.14135 2021 7 21 59416 0.2260 0.4029 -0.14024 2021 7 22 59417 0.2269 0.4016 -0.13894 2021 7 23 59418 0.2279 0.4003 -0.13755 2021 7 24 59419 0.2288 0.3989 -0.13618 2021 7 25 59420 0.2297 0.3975 -0.13494 2021 7 26 59421 0.2305 0.3962 -0.13387 2021 7 27 59422 0.2314 0.3948 -0.13296 2021 7 28 59423 0.2322 0.3934 -0.13218 2021 7 29 59424 0.2330 0.3920 -0.13145 2021 7 30 59425 0.2337 0.3905 -0.13070 2021 7 31 59426 0.2345 0.3891 -0.12988 2021 8 1 59427 0.2352 0.3876 -0.12894 2021 8 2 59428 0.2358 0.3862 -0.12786 2021 8 3 59429 0.2365 0.3847 -0.12663 2021 8 4 59430 0.2371 0.3832 -0.12527 2021 8 5 59431 0.2377 0.3817 -0.12381 2021 8 6 59432 0.2383 0.3802 -0.12232 2021 8 7 59433 0.2388 0.3787 -0.12086 2021 8 8 59434 0.2393 0.3771 -0.11950 2021 8 9 59435 0.2398 0.3756 -0.11833 2021 8 10 59436 0.2402 0.3740 -0.11739 2021 8 11 59437 0.2407 0.3725 -0.11667 2021 8 12 59438 0.2411 0.3709 -0.11614 2021 8 13 59439 0.2414 0.3693 -0.11570 2021 8 14 59440 0.2418 0.3677 -0.11525 2021 8 15 59441 0.2421 0.3661 -0.11466 2021 8 16 59442 0.2423 0.3645 -0.11386 2021 8 17 59443 0.2426 0.3629 -0.11281 2021 8 18 59444 0.2428 0.3613 -0.11155 2021 8 19 59445 0.2430 0.3597 -0.11015 2021 8 20 59446 0.2431 0.3581 -0.10873 2021 8 21 59447 0.2432 0.3565 -0.10741 2021 8 22 59448 0.2433 0.3549 -0.10627 2021 8 23 59449 0.2434 0.3532 -0.10534 2021 8 24 59450 0.2434 0.3516 -0.10461 2021 8 25 59451 0.2434 0.3500 -0.10399 2021 8 26 59452 0.2434 0.3483 -0.10343 2021 8 27 59453 0.2433 0.3467 -0.10285 2021 8 28 59454 0.2432 0.3450 -0.10220 2021 8 29 59455 0.2431 0.3434 -0.10146 2021 8 30 59456 0.2429 0.3418 -0.10061 2021 8 31 59457 0.2428 0.3401 -0.09968 2021 9 1 59458 0.2425 0.3385 -0.09872 2021 9 2 59459 0.2423 0.3369 -0.09776 2021 9 3 59460 0.2420 0.3352 -0.09688 2021 9 4 59461 0.2417 0.3336 -0.09615 2021 9 5 59462 0.2414 0.3320 -0.09564 2021 9 6 59463 0.2410 0.3303 -0.09540 2021 9 7 59464 0.2406 0.3287 -0.09544 2021 9 8 59465 0.2401 0.3271 -0.09572 2021 9 9 59466 0.2397 0.3255 -0.09614 2021 9 10 59467 0.2392 0.3239 -0.09654 2021 9 11 59468 0.2386 0.3223 -0.09681 2021 9 12 59469 0.2381 0.3207 -0.09682 2021 9 13 59470 0.2375 0.3191 -0.09654 2021 9 14 59471 0.2369 0.3175 -0.09599 2021 9 15 59472 0.2362 0.3160 -0.09529 2021 9 16 59473 0.2356 0.3144 -0.09456 2021 9 17 59474 0.2348 0.3128 -0.09393 2021 9 18 59475 0.2341 0.3113 -0.09347 2021 9 19 59476 0.2333 0.3097 -0.09323 2021 9 20 59477 0.2325 0.3082 -0.09317 2021 9 21 59478 0.2317 0.3067 -0.09322 2021 9 22 59479 0.2309 0.3052 -0.09330 2021 9 23 59480 0.2300 0.3037 -0.09336 2021 9 24 59481 0.2291 0.3022 -0.09333 2021 9 25 59482 0.2281 0.3007 -0.09312 2021 9 26 59483 0.2272 0.2993 -0.09271 2021 9 27 59484 0.2262 0.2978 -0.09210 2021 9 28 59485 0.2251 0.2964 -0.09137 2021 9 29 59486 0.2241 0.2950 -0.09057 2021 9 30 59487 0.2230 0.2936 -0.08980 2021 10 1 59488 0.2219 0.2922 -0.08918 2021 10 2 59489 0.2208 0.2908 -0.08870 2021 10 3 59490 0.2196 0.2895 -0.08847 2021 10 4 59491 0.2184 0.2881 -0.08854 2021 10 5 59492 0.2172 0.2868 -0.08890 2021 10 6 59493 0.2160 0.2855 -0.08944 2021 10 7 59494 0.2147 0.2842 -0.09008 2021 10 8 59495 0.2134 0.2829 -0.09073 2021 10 9 59496 0.2121 0.2817 -0.09121 2021 10 10 59497 0.2108 0.2804 -0.09144 2021 10 11 59498 0.2094 0.2792 -0.09143 2021 10 12 59499 0.2081 0.2780 -0.09131 2021 10 13 59500 0.2066 0.2768 -0.09113 2021 10 14 59501 0.2052 0.2757 -0.09095 2021 10 15 59502 0.2038 0.2745 -0.09089 2021 10 16 59503 0.2023 0.2734 -0.09098 2021 10 17 59504 0.2008 0.2723 -0.09121 2021 10 18 59505 0.1993 0.2712 -0.09157 2021 10 19 59506 0.1978 0.2702 -0.09201 2021 10 20 59507 0.1962 0.2691 -0.09247 2021 10 21 59508 0.1946 0.2681 -0.09287 2021 10 22 59509 0.1930 0.2671 -0.09315 2021 10 23 59510 0.1914 0.2662 -0.09338 2021 10 24 59511 0.1898 0.2652 -0.09341 2021 10 25 59512 0.1881 0.2643 -0.09330 2021 10 26 59513 0.1865 0.2634 -0.09311 2021 10 27 59514 0.1848 0.2625 -0.09281 2021 10 28 59515 0.1831 0.2617 -0.09246 2021 10 29 59516 0.1814 0.2609 -0.09217 2021 10 30 59517 0.1796 0.2601 -0.09213 2021 10 31 59518 0.1779 0.2593 -0.09245 2021 11 1 59519 0.1761 0.2585 -0.09307 2021 11 2 59520 0.1743 0.2578 -0.09405 2021 11 3 59521 0.1725 0.2571 -0.09522 2021 11 4 59522 0.1707 0.2564 -0.09642 2021 11 5 59523 0.1689 0.2558 -0.09751 2021 11 6 59524 0.1671 0.2552 -0.09833 2021 11 7 59525 0.1652 0.2546 -0.09888 2021 11 8 59526 0.1634 0.2540 -0.09924 2021 11 9 59527 0.1615 0.2535 -0.09948 2021 11 10 59528 0.1596 0.2530 -0.09971 2021 11 11 59529 0.1577 0.2525 -0.10003 2021 11 12 59530 0.1559 0.2521 -0.10051 2021 11 13 59531 0.1539 0.2516 -0.10118 2021 11 14 59532 0.1520 0.2512 -0.10201 2021 11 15 59533 0.1501 0.2509 -0.10297 2021 11 16 59534 0.1482 0.2505 -0.10391 2021 11 17 59535 0.1462 0.2502 -0.10475 2021 11 18 59536 0.1443 0.2499 -0.10549 2021 11 19 59537 0.1423 0.2497 -0.10610 2021 11 20 59538 0.1404 0.2495 -0.10656 2021 11 21 59539 0.1384 0.2493 -0.10687 2021 11 22 59540 0.1365 0.2491 -0.10703 2021 11 23 59541 0.1345 0.2490 -0.10715 2021 11 24 59542 0.1325 0.2489 -0.10719 2021 11 25 59543 0.1306 0.2488 -0.10724 2021 11 26 59544 0.1286 0.2487 -0.10742 2021 11 27 59545 0.1266 0.2487 -0.10777 2021 11 28 59546 0.1246 0.2487 -0.10841 2021 11 29 59547 0.1227 0.2488 -0.10931 2021 11 30 59548 0.1207 0.2488 -0.11037 2021 12 1 59549 0.1187 0.2489 -0.11152 2021 12 2 59550 0.1167 0.2491 -0.11264 2021 12 3 59551 0.1148 0.2492 -0.11348 2021 12 4 59552 0.1128 0.2494 -0.11403 2021 12 5 59553 0.1108 0.2496 -0.11431 2021 12 6 59554 0.1089 0.2499 -0.11432 2021 12 7 59555 0.1069 0.2502 -0.11428 2021 12 8 59556 0.1050 0.2505 -0.11433 2021 12 9 59557 0.1030 0.2508 -0.11454 2021 12 10 59558 0.1011 0.2512 -0.11489 2021 12 11 59559 0.0991 0.2516 -0.11534 2021 12 12 59560 0.0972 0.2520 -0.11586 2021 12 13 59561 0.0953 0.2524 -0.11637 2021 12 14 59562 0.0934 0.2529 -0.11680 2021 12 15 59563 0.0915 0.2534 -0.11703 2021 12 16 59564 0.0896 0.2540 -0.11706 2021 12 17 59565 0.0877 0.2546 -0.11689 2021 12 18 59566 0.0858 0.2552 -0.11655 2021 12 19 59567 0.0839 0.2558 -0.11605 2021 12 20 59568 0.0821 0.2564 -0.11543 2021 12 21 59569 0.0802 0.2571 -0.11479 2021 12 22 59570 0.0784 0.2578 -0.11428 2021 12 23 59571 0.0766 0.2586 -0.11390 2021 12 24 59572 0.0748 0.2593 -0.11369 2021 12 25 59573 0.0730 0.2601 -0.11366 2021 12 26 59574 0.0712 0.2610 -0.11386 2021 12 27 59575 0.0695 0.2618 -0.11434 2021 12 28 59576 0.0677 0.2627 -0.11504 2021 12 29 59577 0.0660 0.2636 -0.11583 2021 12 30 59578 0.0643 0.2645 -0.11656 2021 12 31 59579 0.0626 0.2655 -0.11710 2022 1 1 59580 0.0609 0.2665 -0.11742 2022 1 2 59581 0.0593 0.2675 -0.11751 2022 1 3 59582 0.0576 0.2685 -0.11748 2022 1 4 59583 0.0560 0.2696 -0.11744 2022 1 5 59584 0.0544 0.2707 -0.11752 2022 1 6 59585 0.0528 0.2718 -0.11776 2022 1 7 59586 0.0513 0.2729 -0.11813 2022 1 8 59587 0.0497 0.2741 -0.11855 2022 1 9 59588 0.0482 0.2753 -0.11897 2022 1 10 59589 0.0467 0.2765 -0.11928 2022 1 11 59590 0.0452 0.2777 -0.11942 2022 1 12 59591 0.0438 0.2789 -0.11934 2022 1 13 59592 0.0423 0.2802 -0.11911 2022 1 14 59593 0.0409 0.2815 -0.11866 2022 1 15 59594 0.0395 0.2828 -0.11805 2022 1 16 59595 0.0382 0.2842 -0.11736 2022 1 17 59596 0.0369 0.2855 -0.11665 2022 1 18 59597 0.0355 0.2869 -0.11602 2022 1 19 59598 0.0343 0.2883 -0.11548 2022 1 20 59599 0.0330 0.2898 -0.11516 2022 1 21 59600 0.0318 0.2912 -0.11513 2022 1 22 59601 0.0306 0.2927 -0.11536 2022 1 23 59602 0.0294 0.2942 -0.11583 2022 1 24 59603 0.0282 0.2957 -0.11649 2022 1 25 59604 0.0271 0.2972 -0.11721 2022 1 26 59605 0.0260 0.2987 -0.11784 2022 1 27 59606 0.0250 0.3003 -0.11834 2022 1 28 59607 0.0239 0.3019 -0.11864 2022 1 29 59608 0.0229 0.3035 -0.11873 2022 1 30 59609 0.0219 0.3051 -0.11876 2022 1 31 59610 0.0210 0.3067 -0.11884 2022 2 1 59611 0.0201 0.3083 -0.11901 2022 2 2 59612 0.0192 0.3100 -0.11939 2022 2 3 59613 0.0183 0.3117 -0.12005 2022 2 4 59614 0.0175 0.3133 -0.12092 2022 2 5 59615 0.0167 0.3150 -0.12184 2022 2 6 59616 0.0159 0.3168 -0.12271 2022 2 7 59617 0.0152 0.3185 -0.12347 2022 2 8 59618 0.0145 0.3202 -0.12405 2022 2 9 59619 0.0138 0.3220 -0.12444 2022 2 10 59620 0.0132 0.3237 -0.12465 2022 2 11 59621 0.0126 0.3255 -0.12468 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) 59237 -109.33 0.68 -5.40 0.03 59238 -109.23 0.63 -5.35 0.09 59239 -109.23 0.63 -5.51 0.09 59240 -109.27 0.62 -5.83 0.10 IERS Celestial Pole Offset Final Series MJD dpsi deps (msec. of arc) 59185 -111.5 -6.4 59186 -111.2 -6.6 59187 -110.8 -6.7 59188 -110.6 -6.7 59189 -110.3 -6.6 59190 -110.0 -6.5 59191 -109.8 -6.4 59192 -109.8 -6.2 59193 -110.0 -6.0 59194 -110.4 -5.8 59195 -111.0 -5.8 59196 -111.4 -6.0 59197 -111.4 -6.1 59198 -111.3 -6.0 59199 -111.0 -5.9 59200 -110.6 -6.0 59201 -110.3 -6.3 59202 -110.0 -6.4 59203 -109.8 -6.2 59204 -109.7 -5.9 59205 -109.7 -5.7 59206 -110.2 -5.5 59207 -110.5 -5.4 59208 -110.6 -5.3 59209 -110.6 -5.1 59210 -110.6 -5.0 59211 -110.7 -5.1 59212 -110.8 -5.4 59213 -110.6 -5.7 59214 -110.1 -5.9 59215 -109.6 -5.8 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 59237 0.228 0.272 0.127 0.028 59238 0.231 0.251 0.120 0.087 59239 0.234 0.251 0.114 0.087 59240 0.237 0.247 0.109 0.101 IAU2000A Celestial Pole Offset Final Series MJD dX dY (msec. of arc) 59185 0.08 0.12 59186 0.11 0.04 59187 0.14 -0.03 59188 0.15 -0.06 59189 0.15 -0.07 59190 0.16 -0.08 59191 0.16 -0.09 59192 0.17 -0.06 59193 0.17 -0.01 59194 0.17 0.04 59195 0.14 0.05 59196 0.08 0.06 59197 0.03 0.06 59198 -0.02 0.06 59199 -0.02 0.02 59200 -0.01 -0.03 59201 0.00 -0.08 59202 0.06 -0.07 59203 0.14 -0.05 59204 0.22 -0.03 59205 0.30 -0.01 59206 0.15 0.16 59207 0.09 0.23 59208 0.06 0.24 59209 0.03 0.25 59210 -0.01 0.27 59211 -0.04 0.28 59212 -0.07 0.30 59213 -0.02 0.20 59214 0.02 0.15 59215 0.05 0.13 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).