********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 14 January 2021 Vol. XXXIV No. 002 ______________________________________________________________________ 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 8 59222 0.05893 .00009 0.31110 .00009 -0.175044 0.000010 21 1 9 59223 0.05833 .00009 0.31200 .00009 -0.175084 0.000010 21 1 10 59224 0.05794 .00009 0.31302 .00009 -0.174871 0.000010 21 1 11 59225 0.05753 .00009 0.31401 .00009 -0.174467 0.000009 21 1 12 59226 0.05693 .00009 0.31469 .00009 -0.173969 0.000009 21 1 13 59227 0.05603 .00009 0.31542 .00009 -0.173426 0.000009 21 1 14 59228 0.05485 .00009 0.31612 .00009 -0.172883 0.000009 _______________________________________________________________________ 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 = 0.1250 - 0.0859 cos A - 0.0676 sin A + 0.0174 cos C + 0.0158 sin C y = 0.3648 - 0.0614 cos A + 0.0773 sin A + 0.0158 cos C - 0.0174 sin C UT1-UTC = -0.1624 + 0.00011 (MJD - 59236) - (UT2-UT1) where A = 2*pi*(MJD-59228)/365.25 and C = 2*pi*(MJD-59228)/435. TAI-UTC(MJD 59229) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59228)**0.80 S t = 0.00025 (MJD-59228)**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 15 59229 0.0538 0.3168 -0.17241 2021 1 16 59230 0.0528 0.3174 -0.17203 2021 1 17 59231 0.0518 0.3181 -0.17176 2021 1 18 59232 0.0510 0.3189 -0.17156 2021 1 19 59233 0.0502 0.3199 -0.17136 2021 1 20 59234 0.0495 0.3209 -0.17115 2021 1 21 59235 0.0487 0.3220 -0.17089 2021 1 22 59236 0.0478 0.3231 -0.17054 2021 1 23 59237 0.0471 0.3242 -0.17006 2021 1 24 59238 0.0464 0.3253 -0.16946 2021 1 25 59239 0.0458 0.3264 -0.16877 2021 1 26 59240 0.0452 0.3276 -0.16803 2021 1 27 59241 0.0445 0.3288 -0.16730 2021 1 28 59242 0.0439 0.3301 -0.16665 2021 1 29 59243 0.0432 0.3314 -0.16612 2021 1 30 59244 0.0424 0.3326 -0.16581 2021 1 31 59245 0.0418 0.3339 -0.16574 2021 2 1 59246 0.0411 0.3352 -0.16590 2021 2 2 59247 0.0406 0.3365 -0.16622 2021 2 3 59248 0.0401 0.3378 -0.16663 2021 2 4 59249 0.0396 0.3392 -0.16699 2021 2 5 59250 0.0391 0.3406 -0.16722 2021 2 6 59251 0.0387 0.3420 -0.16725 2021 2 7 59252 0.0382 0.3435 -0.16709 2021 2 8 59253 0.0378 0.3449 -0.16677 2021 2 9 59254 0.0374 0.3463 -0.16637 2021 2 10 59255 0.0370 0.3477 -0.16599 2021 2 11 59256 0.0367 0.3492 -0.16570 2021 2 12 59257 0.0364 0.3506 -0.16557 2021 2 13 59258 0.0361 0.3520 -0.16560 2021 2 14 59259 0.0359 0.3535 -0.16577 2021 2 15 59260 0.0357 0.3550 -0.16604 2021 2 16 59261 0.0355 0.3564 -0.16633 2021 2 17 59262 0.0353 0.3579 -0.16660 2021 2 18 59263 0.0352 0.3593 -0.16679 2021 2 19 59264 0.0351 0.3608 -0.16686 2021 2 20 59265 0.0351 0.3623 -0.16681 2021 2 21 59266 0.0350 0.3637 -0.16664 2021 2 22 59267 0.0350 0.3652 -0.16637 2021 2 23 59268 0.0350 0.3667 -0.16604 2021 2 24 59269 0.0351 0.3682 -0.16574 2021 2 25 59270 0.0352 0.3696 -0.16555 2021 2 26 59271 0.0353 0.3711 -0.16556 2021 2 27 59272 0.0354 0.3726 -0.16582 2021 2 28 59273 0.0356 0.3740 -0.16636 2021 3 1 59274 0.0358 0.3755 -0.16712 2021 3 2 59275 0.0360 0.3770 -0.16798 2021 3 3 59276 0.0363 0.3785 -0.16881 2021 3 4 59277 0.0366 0.3799 -0.16949 2021 3 5 59278 0.0369 0.3814 -0.16994 2021 3 6 59279 0.0373 0.3829 -0.17016 2021 3 7 59280 0.0376 0.3843 -0.17019 2021 3 8 59281 0.0380 0.3858 -0.17011 2021 3 9 59282 0.0385 0.3873 -0.17003 2021 3 10 59283 0.0389 0.3887 -0.17004 2021 3 11 59284 0.0394 0.3902 -0.17017 2021 3 12 59285 0.0399 0.3916 -0.17047 2021 3 13 59286 0.0405 0.3930 -0.17090 2021 3 14 59287 0.0410 0.3945 -0.17142 2021 3 15 59288 0.0416 0.3959 -0.17197 2021 3 16 59289 0.0423 0.3973 -0.17250 2021 3 17 59290 0.0429 0.3987 -0.17294 2021 3 18 59291 0.0436 0.4001 -0.17326 2021 3 19 59292 0.0443 0.4015 -0.17343 2021 3 20 59293 0.0451 0.4029 -0.17346 2021 3 21 59294 0.0458 0.4043 -0.17335 2021 3 22 59295 0.0466 0.4056 -0.17317 2021 3 23 59296 0.0474 0.4070 -0.17298 2021 3 24 59297 0.0483 0.4083 -0.17286 2021 3 25 59298 0.0491 0.4097 -0.17290 2021 3 26 59299 0.0500 0.4110 -0.17317 2021 3 27 59300 0.0510 0.4123 -0.17372 2021 3 28 59301 0.0519 0.4136 -0.17454 2021 3 29 59302 0.0529 0.4149 -0.17553 2021 3 30 59303 0.0539 0.4162 -0.17655 2021 3 31 59304 0.0549 0.4174 -0.17744 2021 4 1 59305 0.0560 0.4187 -0.17810 2021 4 2 59306 0.0570 0.4199 -0.17848 2021 4 3 59307 0.0581 0.4211 -0.17860 2021 4 4 59308 0.0592 0.4223 -0.17856 2021 4 5 59309 0.0604 0.4235 -0.17846 2021 4 6 59310 0.0616 0.4247 -0.17839 2021 4 7 59311 0.0627 0.4258 -0.17843 2021 4 8 59312 0.0640 0.4270 -0.17861 2021 4 9 59313 0.0652 0.4281 -0.17893 2021 4 10 59314 0.0664 0.4292 -0.17934 2021 4 11 59315 0.0677 0.4303 -0.17981 2021 4 12 59316 0.0690 0.4313 -0.18027 2021 4 13 59317 0.0703 0.4324 -0.18066 2021 4 14 59318 0.0717 0.4334 -0.18095 2021 4 15 59319 0.0731 0.4344 -0.18109 2021 4 16 59320 0.0744 0.4354 -0.18109 2021 4 17 59321 0.0758 0.4364 -0.18095 2021 4 18 59322 0.0773 0.4373 -0.18072 2021 4 19 59323 0.0787 0.4383 -0.18045 2021 4 20 59324 0.0802 0.4392 -0.18020 2021 4 21 59325 0.0816 0.4401 -0.18006 2021 4 22 59326 0.0831 0.4409 -0.18010 2021 4 23 59327 0.0846 0.4418 -0.18039 2021 4 24 59328 0.0862 0.4426 -0.18095 2021 4 25 59329 0.0877 0.4434 -0.18174 2021 4 26 59330 0.0893 0.4442 -0.18263 2021 4 27 59331 0.0908 0.4450 -0.18348 2021 4 28 59332 0.0924 0.4457 -0.18412 2021 4 29 59333 0.0940 0.4464 -0.18448 2021 4 30 59334 0.0957 0.4471 -0.18455 2021 5 1 59335 0.0973 0.4478 -0.18440 2021 5 2 59336 0.0989 0.4484 -0.18413 2021 5 3 59337 0.1006 0.4490 -0.18386 2021 5 4 59338 0.1023 0.4496 -0.18367 2021 5 5 59339 0.1040 0.4502 -0.18359 2021 5 6 59340 0.1056 0.4507 -0.18364 2021 5 7 59341 0.1074 0.4513 -0.18378 2021 5 8 59342 0.1091 0.4517 -0.18396 2021 5 9 59343 0.1108 0.4522 -0.18414 2021 5 10 59344 0.1125 0.4527 -0.18426 2021 5 11 59345 0.1143 0.4531 -0.18426 2021 5 12 59346 0.1160 0.4535 -0.18410 2021 5 13 59347 0.1178 0.4538 -0.18378 2021 5 14 59348 0.1196 0.4542 -0.18330 2021 5 15 59349 0.1213 0.4545 -0.18269 2021 5 16 59350 0.1231 0.4548 -0.18199 2021 5 17 59351 0.1249 0.4550 -0.18129 2021 5 18 59352 0.1267 0.4553 -0.18065 2021 5 19 59353 0.1285 0.4555 -0.18015 2021 5 20 59354 0.1303 0.4556 -0.17986 2021 5 21 59355 0.1321 0.4558 -0.17980 2021 5 22 59356 0.1339 0.4559 -0.17997 2021 5 23 59357 0.1357 0.4560 -0.18030 2021 5 24 59358 0.1376 0.4561 -0.18067 2021 5 25 59359 0.1394 0.4561 -0.18092 2021 5 26 59360 0.1412 0.4561 -0.18092 2021 5 27 59361 0.1430 0.4561 -0.18064 2021 5 28 59362 0.1448 0.4561 -0.18009 2021 5 29 59363 0.1467 0.4560 -0.17939 2021 5 30 59364 0.1485 0.4559 -0.17864 2021 5 31 59365 0.1503 0.4558 -0.17796 2021 6 1 59366 0.1521 0.4556 -0.17739 2021 6 2 59367 0.1539 0.4554 -0.17695 2021 6 3 59368 0.1557 0.4552 -0.17660 2021 6 4 59369 0.1575 0.4550 -0.17630 2021 6 5 59370 0.1593 0.4547 -0.17599 2021 6 6 59371 0.1611 0.4544 -0.17563 2021 6 7 59372 0.1629 0.4541 -0.17516 2021 6 8 59373 0.1647 0.4538 -0.17455 2021 6 9 59374 0.1665 0.4534 -0.17377 2021 6 10 59375 0.1683 0.4530 -0.17282 2021 6 11 59376 0.1701 0.4526 -0.17174 2021 6 12 59377 0.1718 0.4521 -0.17056 2021 6 13 59378 0.1736 0.4516 -0.16936 2021 6 14 59379 0.1753 0.4511 -0.16821 2021 6 15 59380 0.1771 0.4506 -0.16718 2021 6 16 59381 0.1788 0.4500 -0.16632 2021 6 17 59382 0.1805 0.4494 -0.16568 2021 6 18 59383 0.1822 0.4488 -0.16525 2021 6 19 59384 0.1839 0.4482 -0.16499 2021 6 20 59385 0.1856 0.4475 -0.16481 2021 6 21 59386 0.1873 0.4468 -0.16459 2021 6 22 59387 0.1889 0.4461 -0.16419 2021 6 23 59388 0.1906 0.4453 -0.16355 2021 6 24 59389 0.1922 0.4445 -0.16265 2021 6 25 59390 0.1938 0.4437 -0.16156 2021 6 26 59391 0.1954 0.4429 -0.16040 2021 6 27 59392 0.1970 0.4421 -0.15928 2021 6 28 59393 0.1986 0.4412 -0.15828 2021 6 29 59394 0.2001 0.4403 -0.15743 2021 6 30 59395 0.2017 0.4394 -0.15671 2021 7 1 59396 0.2032 0.4384 -0.15605 2021 7 2 59397 0.2047 0.4374 -0.15541 2021 7 3 59398 0.2062 0.4365 -0.15472 2021 7 4 59399 0.2077 0.4354 -0.15393 2021 7 5 59400 0.2091 0.4344 -0.15300 2021 7 6 59401 0.2106 0.4333 -0.15192 2021 7 7 59402 0.2120 0.4322 -0.15067 2021 7 8 59403 0.2134 0.4311 -0.14928 2021 7 9 59404 0.2147 0.4300 -0.14778 2021 7 10 59405 0.2161 0.4288 -0.14624 2021 7 11 59406 0.2174 0.4276 -0.14472 2021 7 12 59407 0.2187 0.4264 -0.14331 2021 7 13 59408 0.2200 0.4252 -0.14205 2021 7 14 59409 0.2213 0.4240 -0.14098 2021 7 15 59410 0.2225 0.4227 -0.14010 2021 7 16 59411 0.2237 0.4214 -0.13935 2021 7 17 59412 0.2249 0.4201 -0.13866 2021 7 18 59413 0.2261 0.4188 -0.13791 2021 7 19 59414 0.2272 0.4175 -0.13699 2021 7 20 59415 0.2284 0.4161 -0.13583 2021 7 21 59416 0.2295 0.4148 -0.13441 2021 7 22 59417 0.2305 0.4134 -0.13278 2021 7 23 59418 0.2316 0.4119 -0.13106 2021 7 24 59419 0.2326 0.4105 -0.12939 2021 7 25 59420 0.2336 0.4091 -0.12790 2021 7 26 59421 0.2345 0.4076 -0.12666 2021 7 27 59422 0.2355 0.4061 -0.12567 2021 7 28 59423 0.2364 0.4046 -0.12487 2021 7 29 59424 0.2373 0.4031 -0.12418 2021 7 30 59425 0.2381 0.4016 -0.12351 2021 7 31 59426 0.2390 0.4001 -0.12278 2021 8 1 59427 0.2398 0.3985 -0.12191 2021 8 2 59428 0.2405 0.3970 -0.12087 2021 8 3 59429 0.2413 0.3954 -0.11965 2021 8 4 59430 0.2420 0.3938 -0.11825 2021 8 5 59431 0.2427 0.3922 -0.11674 2021 8 6 59432 0.2433 0.3906 -0.11516 2021 8 7 59433 0.2439 0.3889 -0.11362 2021 8 8 59434 0.2445 0.3873 -0.11219 2021 8 9 59435 0.2451 0.3857 -0.11095 2021 8 10 59436 0.2456 0.3840 -0.10997 2021 8 11 59437 0.2461 0.3823 -0.10926 2021 8 12 59438 0.2466 0.3807 -0.10876 2021 8 13 59439 0.2470 0.3790 -0.10841 2021 8 14 59440 0.2475 0.3773 -0.10807 2021 8 15 59441 0.2478 0.3756 -0.10765 2021 8 16 59442 0.2482 0.3739 -0.10707 2021 8 17 59443 0.2485 0.3722 -0.10630 2021 8 18 59444 0.2488 0.3704 -0.10535 2021 8 19 59445 0.2490 0.3687 -0.10431 2021 8 20 59446 0.2492 0.3670 -0.10325 2021 8 21 59447 0.2494 0.3652 -0.10228 2021 8 22 59448 0.2496 0.3635 -0.10146 2021 8 23 59449 0.2497 0.3618 -0.10082 2021 8 24 59450 0.2498 0.3600 -0.10036 2021 8 25 59451 0.2499 0.3583 -0.10001 2021 8 26 59452 0.2499 0.3565 -0.09970 2021 8 27 59453 0.2499 0.3548 -0.09935 2021 8 28 59454 0.2498 0.3530 -0.09899 2021 8 29 59455 0.2498 0.3512 -0.09849 2021 8 30 59456 0.2497 0.3495 -0.09784 2021 8 31 59457 0.2495 0.3477 -0.09708 2021 9 1 59458 0.2494 0.3460 -0.09615 2021 9 2 59459 0.2492 0.3442 -0.09511 2021 9 3 59460 0.2489 0.3425 -0.09405 2021 9 4 59461 0.2487 0.3407 -0.09316 2021 9 5 59462 0.2484 0.3390 -0.09258 2021 9 6 59463 0.2480 0.3372 -0.09229 2021 9 7 59464 0.2477 0.3355 -0.09238 2021 9 8 59465 0.2473 0.3337 -0.09273 2021 9 9 59466 0.2468 0.3320 -0.09326 2021 9 10 59467 0.2464 0.3303 -0.09383 2021 9 11 59468 0.2459 0.3286 -0.09428 2021 9 12 59469 0.2454 0.3269 -0.09455 2021 9 13 59470 0.2448 0.3251 -0.09464 2021 9 14 59471 0.2442 0.3234 -0.09455 2021 9 15 59472 0.2436 0.3217 -0.09432 2021 9 16 59473 0.2430 0.3201 -0.09406 2021 9 17 59474 0.2423 0.3184 -0.09389 2021 9 18 59475 0.2416 0.3167 -0.09391 2021 9 19 59476 0.2408 0.3151 -0.09417 2021 9 20 59477 0.2401 0.3134 -0.09466 2021 9 21 59478 0.2393 0.3118 -0.09526 2021 9 22 59479 0.2384 0.3101 -0.09589 2021 9 23 59480 0.2376 0.3085 -0.09653 2021 9 24 59481 0.2367 0.3069 -0.09710 2021 9 25 59482 0.2357 0.3053 -0.09757 2021 9 26 59483 0.2348 0.3037 -0.09790 2021 9 27 59484 0.2338 0.3022 -0.09807 2021 9 28 59485 0.2328 0.3006 -0.09814 2021 9 29 59486 0.2318 0.2991 -0.09808 2021 9 30 59487 0.2307 0.2976 -0.09796 2021 10 1 59488 0.2296 0.2961 -0.09790 2021 10 2 59489 0.2285 0.2946 -0.09796 2021 10 3 59490 0.2273 0.2931 -0.09830 2021 10 4 59491 0.2261 0.2916 -0.09894 2021 10 5 59492 0.2249 0.2902 -0.09982 2021 10 6 59493 0.2237 0.2888 -0.10091 2021 10 7 59494 0.2225 0.2874 -0.10211 2021 10 8 59495 0.2212 0.2860 -0.10317 2021 10 9 59496 0.2199 0.2846 -0.10404 2021 10 10 59497 0.2185 0.2832 -0.10462 2021 10 11 59498 0.2172 0.2819 -0.10489 2021 10 12 59499 0.2158 0.2806 -0.10497 2021 10 13 59500 0.2144 0.2793 -0.10501 2021 10 14 59501 0.2130 0.2780 -0.10510 2021 10 15 59502 0.2115 0.2768 -0.10529 2021 10 16 59503 0.2100 0.2756 -0.10563 2021 10 17 59504 0.2085 0.2743 -0.10613 2021 10 18 59505 0.2070 0.2732 -0.10676 2021 10 19 59506 0.2055 0.2720 -0.10745 2021 10 20 59507 0.2039 0.2709 -0.10806 2021 10 21 59508 0.2023 0.2697 -0.10854 2021 10 22 59509 0.2007 0.2686 -0.10888 2021 10 23 59510 0.1991 0.2676 -0.10904 2021 10 24 59511 0.1974 0.2665 -0.10902 2021 10 25 59512 0.1958 0.2655 -0.10883 2021 10 26 59513 0.1941 0.2645 -0.10854 2021 10 27 59514 0.1924 0.2635 -0.10828 2021 10 28 59515 0.1907 0.2626 -0.10808 2021 10 29 59516 0.1889 0.2617 -0.10797 2021 10 30 59517 0.1872 0.2608 -0.10800 2021 10 31 59518 0.1854 0.2599 -0.10828 2021 11 1 59519 0.1836 0.2591 -0.10892 2021 11 2 59520 0.1818 0.2582 -0.10990 2021 11 3 59521 0.1800 0.2574 -0.11113 2021 11 4 59522 0.1782 0.2567 -0.11242 2021 11 5 59523 0.1763 0.2559 -0.11362 2021 11 6 59524 0.1745 0.2552 -0.11460 2021 11 7 59525 0.1726 0.2546 -0.11527 2021 11 8 59526 0.1707 0.2539 -0.11568 2021 11 9 59527 0.1688 0.2533 -0.11591 2021 11 10 59528 0.1669 0.2527 -0.11611 2021 11 11 59529 0.1650 0.2521 -0.11637 2021 11 12 59530 0.1631 0.2516 -0.11674 2021 11 13 59531 0.1611 0.2511 -0.11720 2021 11 14 59532 0.1592 0.2506 -0.11777 2021 11 15 59533 0.1572 0.2502 -0.11836 2021 11 16 59534 0.1553 0.2497 -0.11889 2021 11 17 59535 0.1533 0.2493 -0.11929 2021 11 18 59536 0.1513 0.2490 -0.11958 2021 11 19 59537 0.1494 0.2487 -0.11967 2021 11 20 59538 0.1474 0.2484 -0.11955 2021 11 21 59539 0.1454 0.2481 -0.11929 2021 11 22 59540 0.1434 0.2479 -0.11891 2021 11 23 59541 0.1414 0.2476 -0.11850 2021 11 24 59542 0.1394 0.2475 -0.11805 2021 11 25 59543 0.1374 0.2473 -0.11772 2021 11 26 59544 0.1353 0.2472 -0.11761 2021 11 27 59545 0.1333 0.2471 -0.11773 2021 11 28 59546 0.1313 0.2471 -0.11813 2021 11 29 59547 0.1293 0.2470 -0.11884 2021 11 30 59548 0.1273 0.2471 -0.11975 2021 12 1 59549 0.1253 0.2471 -0.12076 2021 12 2 59550 0.1233 0.2472 -0.12175 2021 12 3 59551 0.1212 0.2473 -0.12257 2021 12 4 59552 0.1192 0.2474 -0.12312 2021 12 5 59553 0.1172 0.2476 -0.12347 2021 12 6 59554 0.1152 0.2477 -0.12368 2021 12 7 59555 0.1132 0.2480 -0.12380 2021 12 8 59556 0.1112 0.2482 -0.12398 2021 12 9 59557 0.1092 0.2485 -0.12436 2021 12 10 59558 0.1072 0.2488 -0.12495 2021 12 11 59559 0.1053 0.2492 -0.12566 2021 12 12 59560 0.1033 0.2496 -0.12641 2021 12 13 59561 0.1013 0.2500 -0.12715 2021 12 14 59562 0.0994 0.2504 -0.12778 2021 12 15 59563 0.0974 0.2509 -0.12830 2021 12 16 59564 0.0955 0.2514 -0.12865 2021 12 17 59565 0.0935 0.2519 -0.12880 2021 12 18 59566 0.0916 0.2525 -0.12877 2021 12 19 59567 0.0897 0.2531 -0.12860 2021 12 20 59568 0.0878 0.2537 -0.12835 2021 12 21 59569 0.0859 0.2543 -0.12811 2021 12 22 59570 0.0840 0.2550 -0.12797 2021 12 23 59571 0.0822 0.2557 -0.12793 2021 12 24 59572 0.0803 0.2564 -0.12796 2021 12 25 59573 0.0785 0.2572 -0.12808 2021 12 26 59574 0.0767 0.2580 -0.12839 2021 12 27 59575 0.0749 0.2588 -0.12885 2021 12 28 59576 0.0731 0.2597 -0.12939 2021 12 29 59577 0.0713 0.2606 -0.12994 2021 12 30 59578 0.0695 0.2615 -0.13037 2021 12 31 59579 0.0678 0.2624 -0.13057 2022 1 1 59580 0.0661 0.2634 -0.13057 2022 1 2 59581 0.0644 0.2644 -0.13043 2022 1 3 59582 0.0627 0.2654 -0.13025 2022 1 4 59583 0.0610 0.2664 -0.13012 2022 1 5 59584 0.0593 0.2675 -0.13013 2022 1 6 59585 0.0577 0.2686 -0.13029 2022 1 7 59586 0.0561 0.2697 -0.13063 2022 1 8 59587 0.0545 0.2709 -0.13115 2022 1 9 59588 0.0529 0.2720 -0.13173 2022 1 10 59589 0.0514 0.2732 -0.13225 2022 1 11 59590 0.0499 0.2745 -0.13269 2022 1 12 59591 0.0484 0.2757 -0.13302 2022 1 13 59592 0.0469 0.2770 -0.13320 2022 1 14 59593 0.0454 0.2783 -0.13327 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) 59202 -110.00 0.04 -6.28 0.10 59203 -109.95 0.61 -6.13 0.05 59204 -110.04 0.53 -5.84 0.10 59205 -110.15 0.62 -5.64 0.10 59206 -110.23 0.62 -5.57 0.10 59207 -110.33 0.62 -5.52 0.10 59208 -110.36 0.62 -5.38 0.10 59209 -110.30 0.11 -5.20 0.18 59210 -110.22 0.32 -5.14 0.16 59211 -110.23 0.32 -5.28 0.16 59212 -110.27 0.32 -5.56 0.16 59213 -110.17 0.32 -5.79 0.16 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 59202 0.049 0.016 -0.018 0.095 59203 0.072 0.242 0.002 0.053 59204 0.097 0.210 0.024 0.095 59205 0.121 0.246 0.047 0.095 59206 0.142 0.246 0.071 0.095 59207 0.147 0.246 0.078 0.095 59208 0.147 0.246 0.078 0.095 59209 0.147 0.045 0.078 0.181 59210 0.147 0.128 0.078 0.160 59211 0.147 0.128 0.078 0.160 59212 0.147 0.128 0.078 0.160 59213 0.147 0.128 0.078 0.160 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).