********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 28 January 2021 Vol. XXXIV No. 004 ______________________________________________________________________ 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 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. * * * * 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, * * unencrypted FTP service has been permanently discontinued at CDDIS. * * * * For other download options from CDDIS, such as HTTPS or 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. * * * * 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 1 22 59236 0.05241 .00009 0.32309 .00009 -0.170816 0.000015 21 1 23 59237 0.05230 .00009 0.32428 .00009 -0.170482 0.000013 21 1 24 59238 0.05181 .00009 0.32565 .00009 -0.170011 0.000011 21 1 25 59239 0.05100 .00009 0.32715 .00009 -0.169411 0.000007 21 1 26 59240 0.05037 .00009 0.32870 .00009 -0.168706 0.000007 21 1 27 59241 0.05002 .00009 0.33052 .00009 -0.167951 0.000007 21 1 28 59242 0.04972 .00010 0.33249 .00010 -0.167279 0.000006 _______________________________________________________________________ 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 = 0.1274 - 0.0991 cos A - 0.0435 sin A + 0.0208 cos C + 0.0104 sin C y = 0.3646 - 0.0397 cos A + 0.0895 sin A + 0.0104 cos C - 0.0208 sin C UT1-UTC = -0.1621 + 0.00014 (MJD - 59250) - (UT2-UT1) where A = 2*pi*(MJD-59242)/365.25 and C = 2*pi*(MJD-59242)/435. TAI-UTC(MJD 59243) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59242)**0.80 S t = 0.00025 (MJD-59242)**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 1 29 59243 0.0493 0.3343 -0.16685 2021 1 30 59244 0.0488 0.3360 -0.16665 2021 1 31 59245 0.0483 0.3376 -0.16669 2021 2 1 59246 0.0477 0.3390 -0.16698 2021 2 2 59247 0.0472 0.3404 -0.16747 2021 2 3 59248 0.0467 0.3418 -0.16806 2021 2 4 59249 0.0463 0.3432 -0.16862 2021 2 5 59250 0.0459 0.3446 -0.16904 2021 2 6 59251 0.0455 0.3460 -0.16925 2021 2 7 59252 0.0451 0.3474 -0.16922 2021 2 8 59253 0.0446 0.3488 -0.16898 2021 2 9 59254 0.0442 0.3502 -0.16863 2021 2 10 59255 0.0438 0.3516 -0.16826 2021 2 11 59256 0.0434 0.3530 -0.16794 2021 2 12 59257 0.0430 0.3543 -0.16776 2021 2 13 59258 0.0427 0.3556 -0.16771 2021 2 14 59259 0.0425 0.3569 -0.16778 2021 2 15 59260 0.0422 0.3582 -0.16791 2021 2 16 59261 0.0420 0.3595 -0.16805 2021 2 17 59262 0.0419 0.3608 -0.16818 2021 2 18 59263 0.0417 0.3621 -0.16824 2021 2 19 59264 0.0416 0.3633 -0.16817 2021 2 20 59265 0.0415 0.3646 -0.16798 2021 2 21 59266 0.0415 0.3659 -0.16766 2021 2 22 59267 0.0415 0.3673 -0.16725 2021 2 23 59268 0.0415 0.3686 -0.16680 2021 2 24 59269 0.0416 0.3699 -0.16638 2021 2 25 59270 0.0416 0.3713 -0.16609 2021 2 26 59271 0.0417 0.3726 -0.16599 2021 2 27 59272 0.0419 0.3739 -0.16617 2021 2 28 59273 0.0421 0.3753 -0.16663 2021 3 1 59274 0.0423 0.3766 -0.16731 2021 3 2 59275 0.0425 0.3780 -0.16810 2021 3 3 59276 0.0428 0.3793 -0.16886 2021 3 4 59277 0.0431 0.3807 -0.16947 2021 3 5 59278 0.0434 0.3820 -0.16985 2021 3 6 59279 0.0437 0.3834 -0.17000 2021 3 7 59280 0.0441 0.3847 -0.16997 2021 3 8 59281 0.0445 0.3861 -0.16984 2021 3 9 59282 0.0449 0.3875 -0.16971 2021 3 10 59283 0.0454 0.3888 -0.16967 2021 3 11 59284 0.0459 0.3902 -0.16976 2021 3 12 59285 0.0464 0.3915 -0.17001 2021 3 13 59286 0.0469 0.3929 -0.17040 2021 3 14 59287 0.0474 0.3942 -0.17090 2021 3 15 59288 0.0480 0.3955 -0.17144 2021 3 16 59289 0.0486 0.3968 -0.17196 2021 3 17 59290 0.0493 0.3982 -0.17240 2021 3 18 59291 0.0499 0.3995 -0.17273 2021 3 19 59292 0.0506 0.4008 -0.17292 2021 3 20 59293 0.0514 0.4021 -0.17297 2021 3 21 59294 0.0521 0.4034 -0.17290 2021 3 22 59295 0.0529 0.4046 -0.17277 2021 3 23 59296 0.0537 0.4059 -0.17262 2021 3 24 59297 0.0545 0.4071 -0.17255 2021 3 25 59298 0.0553 0.4084 -0.17263 2021 3 26 59299 0.0562 0.4096 -0.17296 2021 3 27 59300 0.0571 0.4108 -0.17356 2021 3 28 59301 0.0580 0.4121 -0.17443 2021 3 29 59302 0.0589 0.4132 -0.17547 2021 3 30 59303 0.0599 0.4144 -0.17656 2021 3 31 59304 0.0609 0.4156 -0.17753 2021 4 1 59305 0.0619 0.4168 -0.17827 2021 4 2 59306 0.0630 0.4179 -0.17873 2021 4 3 59307 0.0640 0.4190 -0.17893 2021 4 4 59308 0.0651 0.4201 -0.17897 2021 4 5 59309 0.0662 0.4212 -0.17895 2021 4 6 59310 0.0674 0.4223 -0.17896 2021 4 7 59311 0.0685 0.4234 -0.17908 2021 4 8 59312 0.0697 0.4245 -0.17932 2021 4 9 59313 0.0709 0.4255 -0.17969 2021 4 10 59314 0.0721 0.4265 -0.18015 2021 4 11 59315 0.0733 0.4275 -0.18065 2021 4 12 59316 0.0746 0.4285 -0.18113 2021 4 13 59317 0.0759 0.4295 -0.18155 2021 4 14 59318 0.0772 0.4304 -0.18186 2021 4 15 59319 0.0785 0.4313 -0.18201 2021 4 16 59320 0.0798 0.4323 -0.18201 2021 4 17 59321 0.0812 0.4332 -0.18186 2021 4 18 59322 0.0826 0.4340 -0.18160 2021 4 19 59323 0.0840 0.4349 -0.18130 2021 4 20 59324 0.0854 0.4357 -0.18102 2021 4 21 59325 0.0868 0.4365 -0.18084 2021 4 22 59326 0.0883 0.4373 -0.18084 2021 4 23 59327 0.0897 0.4381 -0.18109 2021 4 24 59328 0.0912 0.4389 -0.18160 2021 4 25 59329 0.0927 0.4396 -0.18232 2021 4 26 59330 0.0942 0.4403 -0.18315 2021 4 27 59331 0.0958 0.4410 -0.18392 2021 4 28 59332 0.0973 0.4417 -0.18451 2021 4 29 59333 0.0989 0.4423 -0.18480 2021 4 30 59334 0.1004 0.4429 -0.18481 2021 5 1 59335 0.1020 0.4435 -0.18460 2021 5 2 59336 0.1036 0.4441 -0.18428 2021 5 3 59337 0.1052 0.4447 -0.18397 2021 5 4 59338 0.1068 0.4452 -0.18373 2021 5 5 59339 0.1085 0.4457 -0.18362 2021 5 6 59340 0.1101 0.4462 -0.18364 2021 5 7 59341 0.1118 0.4467 -0.18376 2021 5 8 59342 0.1134 0.4471 -0.18393 2021 5 9 59343 0.1151 0.4475 -0.18411 2021 5 10 59344 0.1168 0.4479 -0.18422 2021 5 11 59345 0.1185 0.4482 -0.18423 2021 5 12 59346 0.1202 0.4486 -0.18408 2021 5 13 59347 0.1219 0.4489 -0.18377 2021 5 14 59348 0.1236 0.4492 -0.18329 2021 5 15 59349 0.1253 0.4494 -0.18268 2021 5 16 59350 0.1270 0.4497 -0.18199 2021 5 17 59351 0.1288 0.4499 -0.18127 2021 5 18 59352 0.1305 0.4501 -0.18062 2021 5 19 59353 0.1322 0.4502 -0.18011 2021 5 20 59354 0.1340 0.4504 -0.17979 2021 5 21 59355 0.1357 0.4505 -0.17971 2021 5 22 59356 0.1375 0.4505 -0.17986 2021 5 23 59357 0.1392 0.4506 -0.18017 2021 5 24 59358 0.1410 0.4506 -0.18051 2021 5 25 59359 0.1427 0.4506 -0.18073 2021 5 26 59360 0.1445 0.4506 -0.18071 2021 5 27 59361 0.1463 0.4505 -0.18040 2021 5 28 59362 0.1480 0.4505 -0.17982 2021 5 29 59363 0.1498 0.4503 -0.17909 2021 5 30 59364 0.1515 0.4502 -0.17832 2021 5 31 59365 0.1533 0.4501 -0.17760 2021 6 1 59366 0.1551 0.4499 -0.17700 2021 6 2 59367 0.1568 0.4497 -0.17652 2021 6 3 59368 0.1586 0.4494 -0.17614 2021 6 4 59369 0.1603 0.4491 -0.17581 2021 6 5 59370 0.1620 0.4489 -0.17547 2021 6 6 59371 0.1638 0.4485 -0.17507 2021 6 7 59372 0.1655 0.4482 -0.17457 2021 6 8 59373 0.1672 0.4478 -0.17391 2021 6 9 59374 0.1690 0.4474 -0.17310 2021 6 10 59375 0.1707 0.4470 -0.17211 2021 6 11 59376 0.1724 0.4465 -0.17099 2021 6 12 59377 0.1741 0.4461 -0.16977 2021 6 13 59378 0.1758 0.4456 -0.16852 2021 6 14 59379 0.1775 0.4450 -0.16732 2021 6 15 59380 0.1791 0.4445 -0.16623 2021 6 16 59381 0.1808 0.4439 -0.16532 2021 6 17 59382 0.1825 0.4433 -0.16463 2021 6 18 59383 0.1841 0.4426 -0.16415 2021 6 19 59384 0.1857 0.4420 -0.16384 2021 6 20 59385 0.1873 0.4413 -0.16360 2021 6 21 59386 0.1890 0.4406 -0.16332 2021 6 22 59387 0.1905 0.4399 -0.16287 2021 6 23 59388 0.1921 0.4391 -0.16217 2021 6 24 59389 0.1937 0.4383 -0.16121 2021 6 25 59390 0.1953 0.4375 -0.16007 2021 6 26 59391 0.1968 0.4367 -0.15884 2021 6 27 59392 0.1983 0.4358 -0.15766 2021 6 28 59393 0.1998 0.4349 -0.15661 2021 6 29 59394 0.2013 0.4340 -0.15569 2021 6 30 59395 0.2028 0.4331 -0.15491 2021 7 1 59396 0.2043 0.4321 -0.15420 2021 7 2 59397 0.2057 0.4312 -0.15350 2021 7 3 59398 0.2071 0.4302 -0.15276 2021 7 4 59399 0.2085 0.4292 -0.15192 2021 7 5 59400 0.2099 0.4281 -0.15095 2021 7 6 59401 0.2113 0.4270 -0.14983 2021 7 7 59402 0.2127 0.4260 -0.14855 2021 7 8 59403 0.2140 0.4249 -0.14713 2021 7 9 59404 0.2153 0.4237 -0.14563 2021 7 10 59405 0.2166 0.4226 -0.14408 2021 7 11 59406 0.2178 0.4214 -0.14259 2021 7 12 59407 0.2191 0.4202 -0.14120 2021 7 13 59408 0.2203 0.4190 -0.14000 2021 7 14 59409 0.2215 0.4178 -0.13902 2021 7 15 59410 0.2227 0.4165 -0.13825 2021 7 16 59411 0.2239 0.4153 -0.13765 2021 7 17 59412 0.2250 0.4140 -0.13715 2021 7 18 59413 0.2261 0.4127 -0.13663 2021 7 19 59414 0.2272 0.4113 -0.13599 2021 7 20 59415 0.2283 0.4100 -0.13515 2021 7 21 59416 0.2293 0.4086 -0.13408 2021 7 22 59417 0.2303 0.4073 -0.13281 2021 7 23 59418 0.2313 0.4059 -0.13145 2021 7 24 59419 0.2322 0.4045 -0.13010 2021 7 25 59420 0.2332 0.4030 -0.12886 2021 7 26 59421 0.2341 0.4016 -0.12778 2021 7 27 59422 0.2350 0.4001 -0.12686 2021 7 28 59423 0.2358 0.3987 -0.12603 2021 7 29 59424 0.2366 0.3972 -0.12524 2021 7 30 59425 0.2374 0.3957 -0.12440 2021 7 31 59426 0.2382 0.3942 -0.12345 2021 8 1 59427 0.2390 0.3926 -0.12234 2021 8 2 59428 0.2397 0.3911 -0.12105 2021 8 3 59429 0.2404 0.3895 -0.11957 2021 8 4 59430 0.2410 0.3880 -0.11792 2021 8 5 59431 0.2416 0.3864 -0.11615 2021 8 6 59432 0.2422 0.3848 -0.11434 2021 8 7 59433 0.2428 0.3832 -0.11259 2021 8 8 59434 0.2434 0.3816 -0.11098 2021 8 9 59435 0.2439 0.3800 -0.10962 2021 8 10 59436 0.2443 0.3784 -0.10857 2021 8 11 59437 0.2448 0.3767 -0.10782 2021 8 12 59438 0.2452 0.3751 -0.10734 2021 8 13 59439 0.2456 0.3735 -0.10704 2021 8 14 59440 0.2460 0.3718 -0.10680 2021 8 15 59441 0.2463 0.3701 -0.10651 2021 8 16 59442 0.2466 0.3685 -0.10607 2021 8 17 59443 0.2468 0.3668 -0.10544 2021 8 18 59444 0.2471 0.3651 -0.10462 2021 8 19 59445 0.2473 0.3634 -0.10367 2021 8 20 59446 0.2474 0.3617 -0.10268 2021 8 21 59447 0.2476 0.3600 -0.10175 2021 8 22 59448 0.2477 0.3583 -0.10095 2021 8 23 59449 0.2478 0.3566 -0.10030 2021 8 24 59450 0.2478 0.3549 -0.09980 2021 8 25 59451 0.2478 0.3532 -0.09938 2021 8 26 59452 0.2478 0.3515 -0.09898 2021 8 27 59453 0.2477 0.3498 -0.09850 2021 8 28 59454 0.2477 0.3481 -0.09790 2021 8 29 59455 0.2475 0.3464 -0.09714 2021 8 30 59456 0.2474 0.3446 -0.09620 2021 8 31 59457 0.2472 0.3429 -0.09510 2021 9 1 59458 0.2470 0.3412 -0.09390 2021 9 2 59459 0.2468 0.3395 -0.09268 2021 9 3 59460 0.2465 0.3378 -0.09151 2021 9 4 59461 0.2462 0.3361 -0.09049 2021 9 5 59462 0.2458 0.3344 -0.08967 2021 9 6 59463 0.2455 0.3327 -0.08912 2021 9 7 59464 0.2451 0.3310 -0.08884 2021 9 8 59465 0.2446 0.3293 -0.08880 2021 9 9 59466 0.2441 0.3276 -0.08891 2021 9 10 59467 0.2437 0.3260 -0.08911 2021 9 11 59468 0.2431 0.3243 -0.08923 2021 9 12 59469 0.2426 0.3226 -0.08916 2021 9 13 59470 0.2420 0.3210 -0.08889 2021 9 14 59471 0.2413 0.3193 -0.08847 2021 9 15 59472 0.2407 0.3177 -0.08793 2021 9 16 59473 0.2400 0.3160 -0.08733 2021 9 17 59474 0.2393 0.3144 -0.08680 2021 9 18 59475 0.2385 0.3128 -0.08641 2021 9 19 59476 0.2378 0.3112 -0.08618 2021 9 20 59477 0.2370 0.3096 -0.08613 2021 9 21 59478 0.2361 0.3080 -0.08622 2021 9 22 59479 0.2353 0.3064 -0.08638 2021 9 23 59480 0.2344 0.3048 -0.08654 2021 9 24 59481 0.2334 0.3033 -0.08663 2021 9 25 59482 0.2325 0.3018 -0.08668 2021 9 26 59483 0.2315 0.3002 -0.08656 2021 9 27 59484 0.2305 0.2987 -0.08630 2021 9 28 59485 0.2294 0.2972 -0.08593 2021 9 29 59486 0.2284 0.2957 -0.08543 2021 9 30 59487 0.2273 0.2943 -0.08484 2021 10 1 59488 0.2262 0.2928 -0.08429 2021 10 2 59489 0.2250 0.2914 -0.08396 2021 10 3 59490 0.2238 0.2899 -0.08396 2021 10 4 59491 0.2226 0.2885 -0.08429 2021 10 5 59492 0.2214 0.2871 -0.08500 2021 10 6 59493 0.2201 0.2858 -0.08594 2021 10 7 59494 0.2189 0.2844 -0.08700 2021 10 8 59495 0.2176 0.2831 -0.08801 2021 10 9 59496 0.2162 0.2818 -0.08882 2021 10 10 59497 0.2149 0.2805 -0.08940 2021 10 11 59498 0.2135 0.2792 -0.08976 2021 10 12 59499 0.2121 0.2779 -0.08996 2021 10 13 59500 0.2107 0.2767 -0.09009 2021 10 14 59501 0.2092 0.2755 -0.09025 2021 10 15 59502 0.2077 0.2743 -0.09054 2021 10 16 59503 0.2062 0.2731 -0.09105 2021 10 17 59504 0.2047 0.2719 -0.09176 2021 10 18 59505 0.2032 0.2708 -0.09267 2021 10 19 59506 0.2016 0.2697 -0.09362 2021 10 20 59507 0.2000 0.2686 -0.09455 2021 10 21 59508 0.1984 0.2676 -0.09542 2021 10 22 59509 0.1968 0.2665 -0.09620 2021 10 23 59510 0.1952 0.2655 -0.09684 2021 10 24 59511 0.1935 0.2645 -0.09732 2021 10 25 59512 0.1918 0.2635 -0.09764 2021 10 26 59513 0.1901 0.2626 -0.09789 2021 10 27 59514 0.1884 0.2617 -0.09803 2021 10 28 59515 0.1867 0.2608 -0.09814 2021 10 29 59516 0.1849 0.2599 -0.09835 2021 10 30 59517 0.1832 0.2591 -0.09870 2021 10 31 59518 0.1814 0.2582 -0.09936 2021 11 1 59519 0.1796 0.2574 -0.10029 2021 11 2 59520 0.1778 0.2567 -0.10144 2021 11 3 59521 0.1759 0.2559 -0.10276 2021 11 4 59522 0.1741 0.2552 -0.10411 2021 11 5 59523 0.1723 0.2546 -0.10524 2021 11 6 59524 0.1704 0.2539 -0.10611 2021 11 7 59525 0.1685 0.2533 -0.10668 2021 11 8 59526 0.1666 0.2527 -0.10694 2021 11 9 59527 0.1647 0.2521 -0.10705 2021 11 10 59528 0.1628 0.2515 -0.10720 2021 11 11 59529 0.1609 0.2510 -0.10745 2021 11 12 59530 0.1590 0.2505 -0.10782 2021 11 13 59531 0.1570 0.2501 -0.10833 2021 11 14 59532 0.1551 0.2497 -0.10895 2021 11 15 59533 0.1531 0.2493 -0.10964 2021 11 16 59534 0.1511 0.2489 -0.11031 2021 11 17 59535 0.1492 0.2485 -0.11083 2021 11 18 59536 0.1472 0.2482 -0.11118 2021 11 19 59537 0.1452 0.2479 -0.11135 2021 11 20 59538 0.1432 0.2477 -0.11133 2021 11 21 59539 0.1412 0.2475 -0.11114 2021 11 22 59540 0.1392 0.2473 -0.11079 2021 11 23 59541 0.1372 0.2471 -0.11036 2021 11 24 59542 0.1352 0.2470 -0.11001 2021 11 25 59543 0.1332 0.2469 -0.10975 2021 11 26 59544 0.1312 0.2468 -0.10961 2021 11 27 59545 0.1292 0.2468 -0.10964 2021 11 28 59546 0.1272 0.2468 -0.10991 2021 11 29 59547 0.1252 0.2468 -0.11050 2021 11 30 59548 0.1232 0.2468 -0.11140 2021 12 1 59549 0.1212 0.2469 -0.11246 2021 12 2 59550 0.1191 0.2470 -0.11352 2021 12 3 59551 0.1171 0.2472 -0.11443 2021 12 4 59552 0.1151 0.2473 -0.11510 2021 12 5 59553 0.1131 0.2475 -0.11547 2021 12 6 59554 0.1111 0.2478 -0.11563 2021 12 7 59555 0.1091 0.2480 -0.11571 2021 12 8 59556 0.1072 0.2483 -0.11581 2021 12 9 59557 0.1052 0.2486 -0.11603 2021 12 10 59558 0.1032 0.2490 -0.11637 2021 12 11 59559 0.1012 0.2494 -0.11678 2021 12 12 59560 0.0993 0.2498 -0.11725 2021 12 13 59561 0.0973 0.2502 -0.11766 2021 12 14 59562 0.0954 0.2507 -0.11795 2021 12 15 59563 0.0934 0.2512 -0.11806 2021 12 16 59564 0.0915 0.2518 -0.11803 2021 12 17 59565 0.0896 0.2523 -0.11777 2021 12 18 59566 0.0877 0.2529 -0.11733 2021 12 19 59567 0.0858 0.2535 -0.11676 2021 12 20 59568 0.0839 0.2542 -0.11612 2021 12 21 59569 0.0820 0.2549 -0.11549 2021 12 22 59570 0.0801 0.2556 -0.11489 2021 12 23 59571 0.0783 0.2563 -0.11444 2021 12 24 59572 0.0765 0.2571 -0.11426 2021 12 25 59573 0.0746 0.2579 -0.11432 2021 12 26 59574 0.0728 0.2587 -0.11465 2021 12 27 59575 0.0710 0.2596 -0.11524 2021 12 28 59576 0.0693 0.2604 -0.11596 2021 12 29 59577 0.0675 0.2613 -0.11670 2021 12 30 59578 0.0658 0.2623 -0.11735 2021 12 31 59579 0.0640 0.2632 -0.11781 2022 1 1 59580 0.0623 0.2642 -0.11801 2022 1 2 59581 0.0606 0.2653 -0.11808 2022 1 3 59582 0.0590 0.2663 -0.11809 2022 1 4 59583 0.0573 0.2674 -0.11810 2022 1 5 59584 0.0557 0.2685 -0.11826 2022 1 6 59585 0.0541 0.2696 -0.11866 2022 1 7 59586 0.0525 0.2707 -0.11928 2022 1 8 59587 0.0509 0.2719 -0.11999 2022 1 9 59588 0.0494 0.2731 -0.12069 2022 1 10 59589 0.0478 0.2743 -0.12134 2022 1 11 59590 0.0463 0.2756 -0.12182 2022 1 12 59591 0.0448 0.2768 -0.12215 2022 1 13 59592 0.0434 0.2781 -0.12229 2022 1 14 59593 0.0420 0.2794 -0.12225 2022 1 15 59594 0.0405 0.2808 -0.12206 2022 1 16 59595 0.0392 0.2821 -0.12176 2022 1 17 59596 0.0378 0.2835 -0.12145 2022 1 18 59597 0.0365 0.2849 -0.12121 2022 1 19 59598 0.0352 0.2863 -0.12113 2022 1 20 59599 0.0339 0.2878 -0.12121 2022 1 21 59600 0.0326 0.2893 -0.12140 2022 1 22 59601 0.0314 0.2907 -0.12169 2022 1 23 59602 0.0302 0.2922 -0.12213 2022 1 24 59603 0.0290 0.2938 -0.12267 2022 1 25 59604 0.0279 0.2953 -0.12320 2022 1 26 59605 0.0267 0.2969 -0.12365 2022 1 27 59606 0.0257 0.2985 -0.12393 2022 1 28 59607 0.0246 0.3001 -0.12396 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) 59220 -108.52 0.50 -5.63 0.08 59221 -108.80 0.50 -5.47 0.08 59222 -109.26 0.50 -5.33 0.08 59223 -109.72 0.32 -5.30 0.16 59224 -109.99 0.47 -5.37 0.23 59225 -110.00 0.47 -5.45 0.23 59226 -109.81 0.47 -5.46 0.23 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 59220 0.200 0.200 0.124 0.083 59221 0.198 0.200 0.136 0.083 59222 0.196 0.200 0.149 0.083 59223 0.194 0.128 0.163 0.160 59224 0.191 0.186 0.179 0.227 59225 0.189 0.186 0.195 0.227 59226 0.186 0.186 0.211 0.227 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).