********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 21 January 2021 Vol. XXXIV No. 003 ______________________________________________________________________ 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 15 59229 0.05430 .00009 0.31689 .00009 -0.172451 0.000013 21 1 16 59230 0.05371 .00009 0.31781 .00009 -0.172042 0.000014 21 1 17 59231 0.05301 .00009 0.31872 .00009 -0.171767 0.000009 21 1 18 59232 0.05252 .00009 0.31944 .00009 -0.171584 0.000005 21 1 19 59233 0.05255 .00009 0.32003 .00009 -0.171439 0.000004 21 1 20 59234 0.05271 .00009 0.32090 .00009 -0.171285 0.000004 21 1 21 59235 0.05255 .00009 0.32200 .00009 -0.171094 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 = 0.1275 - 0.0933 cos A - 0.0566 sin A + 0.0189 cos C + 0.0138 sin C y = 0.3628 - 0.0515 cos A + 0.0840 sin A + 0.0138 cos C - 0.0189 sin C UT1-UTC = -0.1610 + 0.00013 (MJD - 59243) - (UT2-UT1) where A = 2*pi*(MJD-59235)/365.25 and C = 2*pi*(MJD-59235)/435. TAI-UTC(MJD 59236) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59235)**0.80 S t = 0.00025 (MJD-59235)**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 22 59236 0.0522 0.3232 -0.17085 2021 1 23 59237 0.0518 0.3244 -0.17050 2021 1 24 59238 0.0513 0.3255 -0.17002 2021 1 25 59239 0.0507 0.3267 -0.16941 2021 1 26 59240 0.0501 0.3277 -0.16870 2021 1 27 59241 0.0495 0.3288 -0.16796 2021 1 28 59242 0.0489 0.3299 -0.16726 2021 1 29 59243 0.0484 0.3311 -0.16669 2021 1 30 59244 0.0477 0.3323 -0.16633 2021 1 31 59245 0.0472 0.3336 -0.16621 2021 2 1 59246 0.0466 0.3349 -0.16634 2021 2 2 59247 0.0461 0.3361 -0.16663 2021 2 3 59248 0.0456 0.3374 -0.16698 2021 2 4 59249 0.0451 0.3386 -0.16726 2021 2 5 59250 0.0446 0.3399 -0.16738 2021 2 6 59251 0.0442 0.3413 -0.16732 2021 2 7 59252 0.0437 0.3426 -0.16707 2021 2 8 59253 0.0432 0.3440 -0.16665 2021 2 9 59254 0.0428 0.3454 -0.16616 2021 2 10 59255 0.0424 0.3467 -0.16569 2021 2 11 59256 0.0420 0.3481 -0.16532 2021 2 12 59257 0.0416 0.3494 -0.16510 2021 2 13 59258 0.0413 0.3508 -0.16505 2021 2 14 59259 0.0410 0.3521 -0.16513 2021 2 15 59260 0.0407 0.3535 -0.16531 2021 2 16 59261 0.0405 0.3549 -0.16552 2021 2 17 59262 0.0403 0.3563 -0.16571 2021 2 18 59263 0.0402 0.3577 -0.16583 2021 2 19 59264 0.0400 0.3591 -0.16584 2021 2 20 59265 0.0399 0.3605 -0.16571 2021 2 21 59266 0.0398 0.3619 -0.16547 2021 2 22 59267 0.0398 0.3633 -0.16513 2021 2 23 59268 0.0397 0.3647 -0.16475 2021 2 24 59269 0.0398 0.3661 -0.16441 2021 2 25 59270 0.0398 0.3675 -0.16419 2021 2 26 59271 0.0399 0.3689 -0.16417 2021 2 27 59272 0.0400 0.3703 -0.16443 2021 2 28 59273 0.0401 0.3717 -0.16495 2021 3 1 59274 0.0402 0.3731 -0.16570 2021 3 2 59275 0.0404 0.3745 -0.16655 2021 3 3 59276 0.0407 0.3759 -0.16737 2021 3 4 59277 0.0409 0.3773 -0.16804 2021 3 5 59278 0.0412 0.3788 -0.16849 2021 3 6 59279 0.0415 0.3802 -0.16869 2021 3 7 59280 0.0418 0.3816 -0.16869 2021 3 8 59281 0.0422 0.3830 -0.16859 2021 3 9 59282 0.0425 0.3844 -0.16848 2021 3 10 59283 0.0430 0.3858 -0.16844 2021 3 11 59284 0.0434 0.3871 -0.16855 2021 3 12 59285 0.0439 0.3885 -0.16881 2021 3 13 59286 0.0444 0.3899 -0.16922 2021 3 14 59287 0.0449 0.3913 -0.16972 2021 3 15 59288 0.0454 0.3927 -0.17028 2021 3 16 59289 0.0460 0.3940 -0.17081 2021 3 17 59290 0.0466 0.3954 -0.17128 2021 3 18 59291 0.0473 0.3967 -0.17163 2021 3 19 59292 0.0479 0.3981 -0.17184 2021 3 20 59293 0.0486 0.3994 -0.17193 2021 3 21 59294 0.0493 0.4007 -0.17190 2021 3 22 59295 0.0501 0.4020 -0.17180 2021 3 23 59296 0.0508 0.4034 -0.17168 2021 3 24 59297 0.0516 0.4047 -0.17162 2021 3 25 59298 0.0524 0.4059 -0.17171 2021 3 26 59299 0.0533 0.4072 -0.17203 2021 3 27 59300 0.0542 0.4085 -0.17262 2021 3 28 59301 0.0551 0.4097 -0.17347 2021 3 29 59302 0.0560 0.4110 -0.17449 2021 3 30 59303 0.0569 0.4122 -0.17552 2021 3 31 59304 0.0579 0.4134 -0.17643 2021 4 1 59305 0.0589 0.4147 -0.17709 2021 4 2 59306 0.0599 0.4158 -0.17748 2021 4 3 59307 0.0609 0.4170 -0.17762 2021 4 4 59308 0.0620 0.4182 -0.17761 2021 4 5 59309 0.0631 0.4193 -0.17754 2021 4 6 59310 0.0642 0.4205 -0.17751 2021 4 7 59311 0.0653 0.4216 -0.17759 2021 4 8 59312 0.0665 0.4227 -0.17780 2021 4 9 59313 0.0677 0.4238 -0.17815 2021 4 10 59314 0.0689 0.4249 -0.17860 2021 4 11 59315 0.0701 0.4259 -0.17910 2021 4 12 59316 0.0714 0.4270 -0.17958 2021 4 13 59317 0.0726 0.4280 -0.17998 2021 4 14 59318 0.0739 0.4290 -0.18026 2021 4 15 59319 0.0752 0.4300 -0.18039 2021 4 16 59320 0.0765 0.4309 -0.18035 2021 4 17 59321 0.0779 0.4319 -0.18017 2021 4 18 59322 0.0792 0.4328 -0.17988 2021 4 19 59323 0.0806 0.4337 -0.17954 2021 4 20 59324 0.0820 0.4346 -0.17923 2021 4 21 59325 0.0834 0.4355 -0.17902 2021 4 22 59326 0.0849 0.4363 -0.17900 2021 4 23 59327 0.0863 0.4372 -0.17922 2021 4 24 59328 0.0878 0.4380 -0.17973 2021 4 25 59329 0.0893 0.4388 -0.18046 2021 4 26 59330 0.0908 0.4395 -0.18132 2021 4 27 59331 0.0923 0.4403 -0.18213 2021 4 28 59332 0.0939 0.4410 -0.18277 2021 4 29 59333 0.0954 0.4417 -0.18312 2021 4 30 59334 0.0970 0.4424 -0.18319 2021 5 1 59335 0.0985 0.4430 -0.18305 2021 5 2 59336 0.1001 0.4437 -0.18279 2021 5 3 59337 0.1017 0.4443 -0.18254 2021 5 4 59338 0.1033 0.4449 -0.18236 2021 5 5 59339 0.1050 0.4454 -0.18230 2021 5 6 59340 0.1066 0.4459 -0.18236 2021 5 7 59341 0.1083 0.4465 -0.18252 2021 5 8 59342 0.1099 0.4469 -0.18271 2021 5 9 59343 0.1116 0.4474 -0.18289 2021 5 10 59344 0.1133 0.4478 -0.18300 2021 5 11 59345 0.1150 0.4483 -0.18298 2021 5 12 59346 0.1167 0.4486 -0.18282 2021 5 13 59347 0.1184 0.4490 -0.18248 2021 5 14 59348 0.1201 0.4493 -0.18198 2021 5 15 59349 0.1218 0.4497 -0.18135 2021 5 16 59350 0.1235 0.4499 -0.18065 2021 5 17 59351 0.1253 0.4502 -0.17993 2021 5 18 59352 0.1270 0.4504 -0.17928 2021 5 19 59353 0.1288 0.4506 -0.17877 2021 5 20 59354 0.1305 0.4508 -0.17845 2021 5 21 59355 0.1323 0.4510 -0.17838 2021 5 22 59356 0.1340 0.4511 -0.17854 2021 5 23 59357 0.1358 0.4512 -0.17886 2021 5 24 59358 0.1375 0.4513 -0.17921 2021 5 25 59359 0.1393 0.4513 -0.17944 2021 5 26 59360 0.1411 0.4514 -0.17944 2021 5 27 59361 0.1429 0.4514 -0.17914 2021 5 28 59362 0.1446 0.4513 -0.17858 2021 5 29 59363 0.1464 0.4513 -0.17786 2021 5 30 59364 0.1482 0.4512 -0.17710 2021 5 31 59365 0.1499 0.4511 -0.17640 2021 6 1 59366 0.1517 0.4509 -0.17581 2021 6 2 59367 0.1535 0.4508 -0.17535 2021 6 3 59368 0.1552 0.4506 -0.17498 2021 6 4 59369 0.1570 0.4504 -0.17466 2021 6 5 59370 0.1587 0.4501 -0.17434 2021 6 6 59371 0.1605 0.4498 -0.17396 2021 6 7 59372 0.1622 0.4495 -0.17347 2021 6 8 59373 0.1640 0.4492 -0.17283 2021 6 9 59374 0.1657 0.4488 -0.17202 2021 6 10 59375 0.1674 0.4485 -0.17105 2021 6 11 59376 0.1692 0.4481 -0.16994 2021 6 12 59377 0.1709 0.4476 -0.16873 2021 6 13 59378 0.1726 0.4472 -0.16750 2021 6 14 59379 0.1743 0.4467 -0.16632 2021 6 15 59380 0.1760 0.4462 -0.16525 2021 6 16 59381 0.1777 0.4456 -0.16436 2021 6 17 59382 0.1793 0.4451 -0.16368 2021 6 18 59383 0.1810 0.4445 -0.16322 2021 6 19 59384 0.1827 0.4438 -0.16293 2021 6 20 59385 0.1843 0.4432 -0.16271 2021 6 21 59386 0.1859 0.4425 -0.16246 2021 6 22 59387 0.1876 0.4418 -0.16203 2021 6 23 59388 0.1892 0.4411 -0.16135 2021 6 24 59389 0.1907 0.4404 -0.16042 2021 6 25 59390 0.1923 0.4396 -0.15930 2021 6 26 59391 0.1939 0.4388 -0.15811 2021 6 27 59392 0.1954 0.4380 -0.15696 2021 6 28 59393 0.1970 0.4371 -0.15593 2021 6 29 59394 0.1985 0.4363 -0.15506 2021 6 30 59395 0.2000 0.4354 -0.15430 2021 7 1 59396 0.2015 0.4345 -0.15362 2021 7 2 59397 0.2030 0.4335 -0.15296 2021 7 3 59398 0.2044 0.4326 -0.15225 2021 7 4 59399 0.2058 0.4316 -0.15145 2021 7 5 59400 0.2073 0.4306 -0.15051 2021 7 6 59401 0.2087 0.4295 -0.14942 2021 7 7 59402 0.2100 0.4285 -0.14817 2021 7 8 59403 0.2114 0.4274 -0.14678 2021 7 9 59404 0.2127 0.4263 -0.14529 2021 7 10 59405 0.2141 0.4252 -0.14378 2021 7 11 59406 0.2153 0.4240 -0.14230 2021 7 12 59407 0.2166 0.4229 -0.14093 2021 7 13 59408 0.2179 0.4217 -0.13975 2021 7 14 59409 0.2191 0.4205 -0.13877 2021 7 15 59410 0.2203 0.4193 -0.13800 2021 7 16 59411 0.2215 0.4180 -0.13740 2021 7 17 59412 0.2227 0.4168 -0.13688 2021 7 18 59413 0.2238 0.4155 -0.13633 2021 7 19 59414 0.2249 0.4142 -0.13565 2021 7 20 59415 0.2260 0.4129 -0.13476 2021 7 21 59416 0.2271 0.4115 -0.13361 2021 7 22 59417 0.2281 0.4102 -0.13225 2021 7 23 59418 0.2292 0.4088 -0.13076 2021 7 24 59419 0.2302 0.4074 -0.12926 2021 7 25 59420 0.2311 0.4060 -0.12783 2021 7 26 59421 0.2321 0.4046 -0.12653 2021 7 27 59422 0.2330 0.4032 -0.12536 2021 7 28 59423 0.2339 0.4017 -0.12427 2021 7 29 59424 0.2347 0.4003 -0.12321 2021 7 30 59425 0.2356 0.3988 -0.12214 2021 7 31 59426 0.2364 0.3973 -0.12101 2021 8 1 59427 0.2372 0.3958 -0.11982 2021 8 2 59428 0.2379 0.3943 -0.11856 2021 8 3 59429 0.2386 0.3927 -0.11723 2021 8 4 59430 0.2393 0.3912 -0.11585 2021 8 5 59431 0.2400 0.3896 -0.11444 2021 8 6 59432 0.2406 0.3881 -0.11306 2021 8 7 59433 0.2412 0.3865 -0.11175 2021 8 8 59434 0.2418 0.3849 -0.11057 2021 8 9 59435 0.2423 0.3833 -0.10957 2021 8 10 59436 0.2429 0.3817 -0.10878 2021 8 11 59437 0.2434 0.3801 -0.10819 2021 8 12 59438 0.2438 0.3784 -0.10776 2021 8 13 59439 0.2442 0.3768 -0.10739 2021 8 14 59440 0.2446 0.3751 -0.10700 2021 8 15 59441 0.2450 0.3735 -0.10647 2021 8 16 59442 0.2453 0.3718 -0.10575 2021 8 17 59443 0.2456 0.3702 -0.10479 2021 8 18 59444 0.2459 0.3685 -0.10364 2021 8 19 59445 0.2461 0.3668 -0.10238 2021 8 20 59446 0.2464 0.3651 -0.10112 2021 8 21 59447 0.2465 0.3634 -0.10000 2021 8 22 59448 0.2467 0.3617 -0.09908 2021 8 23 59449 0.2468 0.3600 -0.09839 2021 8 24 59450 0.2469 0.3583 -0.09789 2021 8 25 59451 0.2469 0.3566 -0.09749 2021 8 26 59452 0.2469 0.3549 -0.09713 2021 8 27 59453 0.2469 0.3532 -0.09673 2021 8 28 59454 0.2469 0.3515 -0.09625 2021 8 29 59455 0.2468 0.3498 -0.09564 2021 8 30 59456 0.2467 0.3481 -0.09490 2021 8 31 59457 0.2466 0.3464 -0.09408 2021 9 1 59458 0.2464 0.3447 -0.09316 2021 9 2 59459 0.2462 0.3430 -0.09218 2021 9 3 59460 0.2459 0.3413 -0.09120 2021 9 4 59461 0.2457 0.3396 -0.09029 2021 9 5 59462 0.2454 0.3378 -0.08953 2021 9 6 59463 0.2450 0.3361 -0.08900 2021 9 7 59464 0.2447 0.3345 -0.08875 2021 9 8 59465 0.2443 0.3328 -0.08875 2021 9 9 59466 0.2439 0.3311 -0.08894 2021 9 10 59467 0.2434 0.3294 -0.08918 2021 9 11 59468 0.2429 0.3277 -0.08942 2021 9 12 59469 0.2424 0.3260 -0.08946 2021 9 13 59470 0.2418 0.3244 -0.08928 2021 9 14 59471 0.2412 0.3227 -0.08891 2021 9 15 59472 0.2406 0.3211 -0.08835 2021 9 16 59473 0.2400 0.3194 -0.08770 2021 9 17 59474 0.2393 0.3178 -0.08709 2021 9 18 59475 0.2386 0.3162 -0.08672 2021 9 19 59476 0.2379 0.3146 -0.08667 2021 9 20 59477 0.2371 0.3129 -0.08686 2021 9 21 59478 0.2363 0.3114 -0.08729 2021 9 22 59479 0.2355 0.3098 -0.08780 2021 9 23 59480 0.2346 0.3082 -0.08830 2021 9 24 59481 0.2337 0.3066 -0.08872 2021 9 25 59482 0.2328 0.3051 -0.08898 2021 9 26 59483 0.2319 0.3035 -0.08909 2021 9 27 59484 0.2309 0.3020 -0.08910 2021 9 28 59485 0.2299 0.3005 -0.08900 2021 9 29 59486 0.2289 0.2990 -0.08883 2021 9 30 59487 0.2278 0.2975 -0.08864 2021 10 1 59488 0.2267 0.2961 -0.08853 2021 10 2 59489 0.2256 0.2946 -0.08859 2021 10 3 59490 0.2245 0.2932 -0.08890 2021 10 4 59491 0.2233 0.2918 -0.08953 2021 10 5 59492 0.2221 0.2903 -0.09041 2021 10 6 59493 0.2209 0.2890 -0.09147 2021 10 7 59494 0.2197 0.2876 -0.09266 2021 10 8 59495 0.2184 0.2862 -0.09383 2021 10 9 59496 0.2171 0.2849 -0.09486 2021 10 10 59497 0.2158 0.2836 -0.09564 2021 10 11 59498 0.2144 0.2823 -0.09617 2021 10 12 59499 0.2131 0.2810 -0.09654 2021 10 13 59500 0.2117 0.2798 -0.09678 2021 10 14 59501 0.2103 0.2785 -0.09700 2021 10 15 59502 0.2088 0.2773 -0.09735 2021 10 16 59503 0.2074 0.2761 -0.09786 2021 10 17 59504 0.2059 0.2749 -0.09861 2021 10 18 59505 0.2044 0.2738 -0.09952 2021 10 19 59506 0.2028 0.2727 -0.10047 2021 10 20 59507 0.2013 0.2715 -0.10143 2021 10 21 59508 0.1997 0.2705 -0.10232 2021 10 22 59509 0.1981 0.2694 -0.10298 2021 10 23 59510 0.1965 0.2684 -0.10345 2021 10 24 59511 0.1949 0.2673 -0.10374 2021 10 25 59512 0.1933 0.2664 -0.10381 2021 10 26 59513 0.1916 0.2654 -0.10376 2021 10 27 59514 0.1899 0.2644 -0.10371 2021 10 28 59515 0.1882 0.2635 -0.10368 2021 10 29 59516 0.1865 0.2626 -0.10372 2021 10 30 59517 0.1848 0.2618 -0.10391 2021 10 31 59518 0.1830 0.2609 -0.10432 2021 11 1 59519 0.1813 0.2601 -0.10498 2021 11 2 59520 0.1795 0.2593 -0.10586 2021 11 3 59521 0.1777 0.2586 -0.10683 2021 11 4 59522 0.1759 0.2578 -0.10777 2021 11 5 59523 0.1741 0.2571 -0.10858 2021 11 6 59524 0.1722 0.2564 -0.10914 2021 11 7 59525 0.1704 0.2558 -0.10940 2021 11 8 59526 0.1685 0.2551 -0.10940 2021 11 9 59527 0.1666 0.2545 -0.10928 2021 11 10 59528 0.1648 0.2540 -0.10922 2021 11 11 59529 0.1629 0.2534 -0.10929 2021 11 12 59530 0.1610 0.2529 -0.10951 2021 11 13 59531 0.1591 0.2524 -0.10986 2021 11 14 59532 0.1571 0.2520 -0.11036 2021 11 15 59533 0.1552 0.2516 -0.11102 2021 11 16 59534 0.1533 0.2512 -0.11179 2021 11 17 59535 0.1513 0.2508 -0.11257 2021 11 18 59536 0.1494 0.2504 -0.11327 2021 11 19 59537 0.1474 0.2501 -0.11383 2021 11 20 59538 0.1454 0.2499 -0.11424 2021 11 21 59539 0.1435 0.2496 -0.11445 2021 11 22 59540 0.1415 0.2494 -0.11450 2021 11 23 59541 0.1395 0.2492 -0.11444 2021 11 24 59542 0.1376 0.2490 -0.11434 2021 11 25 59543 0.1356 0.2489 -0.11427 2021 11 26 59544 0.1336 0.2488 -0.11428 2021 11 27 59545 0.1316 0.2487 -0.11442 2021 11 28 59546 0.1296 0.2487 -0.11477 2021 11 29 59547 0.1276 0.2487 -0.11529 2021 11 30 59548 0.1256 0.2487 -0.11594 2021 12 1 59549 0.1236 0.2487 -0.11662 2021 12 2 59550 0.1217 0.2488 -0.11727 2021 12 3 59551 0.1197 0.2489 -0.11770 2021 12 4 59552 0.1177 0.2491 -0.11785 2021 12 5 59553 0.1157 0.2493 -0.11775 2021 12 6 59554 0.1137 0.2495 -0.11748 2021 12 7 59555 0.1118 0.2497 -0.11720 2021 12 8 59556 0.1098 0.2500 -0.11696 2021 12 9 59557 0.1078 0.2503 -0.11692 2021 12 10 59558 0.1059 0.2506 -0.11714 2021 12 11 59559 0.1039 0.2509 -0.11753 2021 12 12 59560 0.1020 0.2513 -0.11806 2021 12 13 59561 0.1000 0.2517 -0.11865 2021 12 14 59562 0.0981 0.2522 -0.11921 2021 12 15 59563 0.0962 0.2526 -0.11964 2021 12 16 59564 0.0943 0.2532 -0.11994 2021 12 17 59565 0.0924 0.2537 -0.12008 2021 12 18 59566 0.0905 0.2543 -0.12004 2021 12 19 59567 0.0886 0.2548 -0.11993 2021 12 20 59568 0.0867 0.2555 -0.11976 2021 12 21 59569 0.0848 0.2561 -0.11953 2021 12 22 59570 0.0830 0.2568 -0.11934 2021 12 23 59571 0.0812 0.2575 -0.11932 2021 12 24 59572 0.0793 0.2582 -0.11951 2021 12 25 59573 0.0775 0.2590 -0.11988 2021 12 26 59574 0.0757 0.2598 -0.12044 2021 12 27 59575 0.0740 0.2606 -0.12118 2021 12 28 59576 0.0722 0.2615 -0.12198 2021 12 29 59577 0.0704 0.2624 -0.12280 2021 12 30 59578 0.0687 0.2633 -0.12349 2021 12 31 59579 0.0670 0.2642 -0.12396 2022 1 1 59580 0.0653 0.2652 -0.12418 2022 1 2 59581 0.0636 0.2662 -0.12419 2022 1 3 59582 0.0620 0.2672 -0.12412 2022 1 4 59583 0.0603 0.2682 -0.12413 2022 1 5 59584 0.0587 0.2693 -0.12432 2022 1 6 59585 0.0571 0.2704 -0.12470 2022 1 7 59586 0.0555 0.2715 -0.12517 2022 1 8 59587 0.0539 0.2726 -0.12563 2022 1 9 59588 0.0524 0.2738 -0.12608 2022 1 10 59589 0.0509 0.2750 -0.12645 2022 1 11 59590 0.0494 0.2762 -0.12667 2022 1 12 59591 0.0479 0.2774 -0.12673 2022 1 13 59592 0.0465 0.2787 -0.12661 2022 1 14 59593 0.0450 0.2800 -0.12629 2022 1 15 59594 0.0436 0.2813 -0.12588 2022 1 16 59595 0.0422 0.2826 -0.12544 2022 1 17 59596 0.0409 0.2840 -0.12502 2022 1 18 59597 0.0395 0.2854 -0.12465 2022 1 19 59598 0.0382 0.2868 -0.12438 2022 1 20 59599 0.0370 0.2882 -0.12423 2022 1 21 59600 0.0357 0.2896 -0.12430 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) 59214 -109.71 0.32 -5.87 0.16 59215 -109.25 0.32 -5.83 0.16 59216 -108.88 0.32 -5.77 0.16 59217 -108.65 0.52 -5.74 0.09 59218 -108.52 0.52 -5.75 0.09 59219 -108.44 0.52 -5.75 0.09 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 59214 0.198 0.128 0.102 0.160 59215 0.201 0.128 0.102 0.160 59216 0.204 0.128 0.102 0.160 59217 0.206 0.207 0.101 0.088 59218 0.207 0.207 0.099 0.088 59219 0.209 0.207 0.098 0.088 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).