********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 4 February 2021 Vol. XXXIV No. 005 ______________________________________________________________________ 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. * * * * As of Bulletin A Vol. XXXIV, No. 004, 04 Feb 2021, we have * * incorporated the new USNO VLBI solutions -- usno2020d.eoxy and * * usno2020d.eopi. The effect appears to be less than 0.1 mas in * * polar motion and 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 1 29 59243 0.04984 .00009 0.33431 .00009 -0.166919 0.000010 21 1 30 59244 0.04960 .00009 0.33612 .00009 -0.166679 0.000011 21 1 31 59245 0.04938 .00009 0.33792 .00009 -0.166688 0.000011 21 2 1 59246 0.04941 .00009 0.33985 .00009 -0.166998 0.000008 21 2 2 59247 0.04944 .00009 0.34165 .00009 -0.167541 0.000008 21 2 3 59248 0.04931 .00009 0.34313 .00009 -0.168172 0.000008 21 2 4 59249 0.04922 .00009 0.34442 .00009 -0.168756 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 = 0.1283 - 0.1042 cos A - 0.0294 sin A + 0.0233 cos C + 0.0071 sin C y = 0.3665 - 0.0269 cos A + 0.0945 sin A + 0.0071 cos C - 0.0233 sin C UT1-UTC = -0.1650 + 0.00016 (MJD - 59257) - (UT2-UT1) where A = 2*pi*(MJD-59249)/365.25 and C = 2*pi*(MJD-59249)/435. TAI-UTC(MJD 59250) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59249)**0.80 S t = 0.00025 (MJD-59249)**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 5 59250 0.0491 0.3457 -0.16920 2021 2 6 59251 0.0490 0.3470 -0.16944 2021 2 7 59252 0.0488 0.3482 -0.16948 2021 2 8 59253 0.0486 0.3495 -0.16937 2021 2 9 59254 0.0484 0.3509 -0.16921 2021 2 10 59255 0.0482 0.3522 -0.16910 2021 2 11 59256 0.0480 0.3535 -0.16911 2021 2 12 59257 0.0478 0.3548 -0.16929 2021 2 13 59258 0.0476 0.3560 -0.16961 2021 2 14 59259 0.0474 0.3573 -0.17004 2021 2 15 59260 0.0473 0.3586 -0.17051 2021 2 16 59261 0.0472 0.3599 -0.17098 2021 2 17 59262 0.0471 0.3612 -0.17140 2021 2 18 59263 0.0470 0.3625 -0.17171 2021 2 19 59264 0.0469 0.3638 -0.17186 2021 2 20 59265 0.0469 0.3651 -0.17185 2021 2 21 59266 0.0469 0.3663 -0.17168 2021 2 22 59267 0.0469 0.3676 -0.17137 2021 2 23 59268 0.0469 0.3689 -0.17101 2021 2 24 59269 0.0469 0.3702 -0.17064 2021 2 25 59270 0.0470 0.3715 -0.17036 2021 2 26 59271 0.0471 0.3727 -0.17026 2021 2 27 59272 0.0472 0.3740 -0.17042 2021 2 28 59273 0.0474 0.3753 -0.17086 2021 3 1 59274 0.0475 0.3766 -0.17150 2021 3 2 59275 0.0477 0.3779 -0.17225 2021 3 3 59276 0.0479 0.3792 -0.17297 2021 3 4 59277 0.0482 0.3804 -0.17353 2021 3 5 59278 0.0484 0.3817 -0.17386 2021 3 6 59279 0.0487 0.3830 -0.17396 2021 3 7 59280 0.0491 0.3843 -0.17388 2021 3 8 59281 0.0494 0.3855 -0.17369 2021 3 9 59282 0.0498 0.3868 -0.17350 2021 3 10 59283 0.0502 0.3881 -0.17339 2021 3 11 59284 0.0506 0.3893 -0.17343 2021 3 12 59285 0.0511 0.3906 -0.17363 2021 3 13 59286 0.0515 0.3919 -0.17398 2021 3 14 59287 0.0520 0.3931 -0.17442 2021 3 15 59288 0.0526 0.3944 -0.17491 2021 3 16 59289 0.0531 0.3956 -0.17538 2021 3 17 59290 0.0537 0.3968 -0.17579 2021 3 18 59291 0.0543 0.3981 -0.17609 2021 3 19 59292 0.0549 0.3993 -0.17626 2021 3 20 59293 0.0556 0.4005 -0.17629 2021 3 21 59294 0.0563 0.4017 -0.17622 2021 3 22 59295 0.0570 0.4029 -0.17608 2021 3 23 59296 0.0577 0.4041 -0.17592 2021 3 24 59297 0.0585 0.4053 -0.17584 2021 3 25 59298 0.0593 0.4064 -0.17592 2021 3 26 59299 0.0601 0.4076 -0.17623 2021 3 27 59300 0.0609 0.4088 -0.17681 2021 3 28 59301 0.0618 0.4099 -0.17766 2021 3 29 59302 0.0626 0.4110 -0.17869 2021 3 30 59303 0.0635 0.4122 -0.17974 2021 3 31 59304 0.0645 0.4133 -0.18068 2021 4 1 59305 0.0654 0.4144 -0.18139 2021 4 2 59306 0.0664 0.4155 -0.18182 2021 4 3 59307 0.0674 0.4165 -0.18200 2021 4 4 59308 0.0684 0.4176 -0.18203 2021 4 5 59309 0.0695 0.4186 -0.18201 2021 4 6 59310 0.0705 0.4197 -0.18203 2021 4 7 59311 0.0716 0.4207 -0.18216 2021 4 8 59312 0.0727 0.4217 -0.18243 2021 4 9 59313 0.0738 0.4227 -0.18283 2021 4 10 59314 0.0750 0.4237 -0.18335 2021 4 11 59315 0.0762 0.4246 -0.18391 2021 4 12 59316 0.0774 0.4256 -0.18447 2021 4 13 59317 0.0786 0.4265 -0.18496 2021 4 14 59318 0.0798 0.4274 -0.18532 2021 4 15 59319 0.0811 0.4283 -0.18552 2021 4 16 59320 0.0823 0.4292 -0.18556 2021 4 17 59321 0.0836 0.4300 -0.18545 2021 4 18 59322 0.0849 0.4309 -0.18522 2021 4 19 59323 0.0863 0.4317 -0.18494 2021 4 20 59324 0.0876 0.4325 -0.18468 2021 4 21 59325 0.0890 0.4333 -0.18451 2021 4 22 59326 0.0903 0.4340 -0.18452 2021 4 23 59327 0.0917 0.4348 -0.18477 2021 4 24 59328 0.0931 0.4355 -0.18530 2021 4 25 59329 0.0946 0.4362 -0.18605 2021 4 26 59330 0.0960 0.4369 -0.18691 2021 4 27 59331 0.0975 0.4376 -0.18772 2021 4 28 59332 0.0990 0.4382 -0.18833 2021 4 29 59333 0.1004 0.4388 -0.18867 2021 4 30 59334 0.1019 0.4394 -0.18871 2021 5 1 59335 0.1035 0.4400 -0.18853 2021 5 2 59336 0.1050 0.4406 -0.18824 2021 5 3 59337 0.1065 0.4411 -0.18794 2021 5 4 59338 0.1081 0.4416 -0.18772 2021 5 5 59339 0.1096 0.4421 -0.18761 2021 5 6 59340 0.1112 0.4426 -0.18761 2021 5 7 59341 0.1128 0.4430 -0.18770 2021 5 8 59342 0.1144 0.4435 -0.18783 2021 5 9 59343 0.1160 0.4439 -0.18795 2021 5 10 59344 0.1176 0.4442 -0.18801 2021 5 11 59345 0.1192 0.4446 -0.18795 2021 5 12 59346 0.1209 0.4449 -0.18774 2021 5 13 59347 0.1225 0.4452 -0.18737 2021 5 14 59348 0.1242 0.4455 -0.18683 2021 5 15 59349 0.1258 0.4458 -0.18617 2021 5 16 59350 0.1275 0.4460 -0.18544 2021 5 17 59351 0.1292 0.4462 -0.18470 2021 5 18 59352 0.1308 0.4464 -0.18404 2021 5 19 59353 0.1325 0.4465 -0.18352 2021 5 20 59354 0.1342 0.4467 -0.18321 2021 5 21 59355 0.1359 0.4468 -0.18314 2021 5 22 59356 0.1376 0.4469 -0.18331 2021 5 23 59357 0.1393 0.4469 -0.18364 2021 5 24 59358 0.1410 0.4469 -0.18399 2021 5 25 59359 0.1427 0.4469 -0.18422 2021 5 26 59360 0.1444 0.4469 -0.18421 2021 5 27 59361 0.1461 0.4469 -0.18391 2021 5 28 59362 0.1478 0.4468 -0.18334 2021 5 29 59363 0.1495 0.4467 -0.18262 2021 5 30 59364 0.1512 0.4466 -0.18185 2021 5 31 59365 0.1529 0.4464 -0.18113 2021 6 1 59366 0.1546 0.4463 -0.18054 2021 6 2 59367 0.1563 0.4461 -0.18006 2021 6 3 59368 0.1580 0.4459 -0.17967 2021 6 4 59369 0.1597 0.4456 -0.17933 2021 6 5 59370 0.1613 0.4453 -0.17899 2021 6 6 59371 0.1630 0.4450 -0.17858 2021 6 7 59372 0.1647 0.4447 -0.17806 2021 6 8 59373 0.1664 0.4443 -0.17740 2021 6 9 59374 0.1681 0.4440 -0.17656 2021 6 10 59375 0.1697 0.4436 -0.17557 2021 6 11 59376 0.1714 0.4431 -0.17442 2021 6 12 59377 0.1730 0.4427 -0.17319 2021 6 13 59378 0.1747 0.4422 -0.17193 2021 6 14 59379 0.1763 0.4417 -0.17071 2021 6 15 59380 0.1779 0.4412 -0.16961 2021 6 16 59381 0.1796 0.4406 -0.16869 2021 6 17 59382 0.1812 0.4400 -0.16798 2021 6 18 59383 0.1828 0.4394 -0.16748 2021 6 19 59384 0.1844 0.4388 -0.16716 2021 6 20 59385 0.1859 0.4381 -0.16691 2021 6 21 59386 0.1875 0.4374 -0.16662 2021 6 22 59387 0.1891 0.4367 -0.16615 2021 6 23 59388 0.1906 0.4360 -0.16544 2021 6 24 59389 0.1921 0.4353 -0.16447 2021 6 25 59390 0.1936 0.4345 -0.16331 2021 6 26 59391 0.1952 0.4337 -0.16207 2021 6 27 59392 0.1966 0.4329 -0.16088 2021 6 28 59393 0.1981 0.4320 -0.15980 2021 6 29 59394 0.1996 0.4311 -0.15887 2021 6 30 59395 0.2010 0.4302 -0.15807 2021 7 1 59396 0.2024 0.4293 -0.15734 2021 7 2 59397 0.2038 0.4284 -0.15662 2021 7 3 59398 0.2052 0.4274 -0.15586 2021 7 4 59399 0.2066 0.4264 -0.15501 2021 7 5 59400 0.2080 0.4254 -0.15402 2021 7 6 59401 0.2093 0.4244 -0.15287 2021 7 7 59402 0.2106 0.4234 -0.15157 2021 7 8 59403 0.2119 0.4223 -0.15013 2021 7 9 59404 0.2132 0.4212 -0.14859 2021 7 10 59405 0.2145 0.4201 -0.14702 2021 7 11 59406 0.2157 0.4190 -0.14549 2021 7 12 59407 0.2169 0.4178 -0.14408 2021 7 13 59408 0.2181 0.4166 -0.14285 2021 7 14 59409 0.2193 0.4155 -0.14184 2021 7 15 59410 0.2205 0.4142 -0.14104 2021 7 16 59411 0.2216 0.4130 -0.14041 2021 7 17 59412 0.2227 0.4118 -0.13988 2021 7 18 59413 0.2238 0.4105 -0.13934 2021 7 19 59414 0.2249 0.4092 -0.13868 2021 7 20 59415 0.2259 0.4079 -0.13782 2021 7 21 59416 0.2269 0.4066 -0.13673 2021 7 22 59417 0.2279 0.4053 -0.13546 2021 7 23 59418 0.2289 0.4039 -0.13409 2021 7 24 59419 0.2298 0.4026 -0.13275 2021 7 25 59420 0.2308 0.4012 -0.13152 2021 7 26 59421 0.2317 0.3998 -0.13047 2021 7 27 59422 0.2325 0.3984 -0.12959 2021 7 28 59423 0.2334 0.3969 -0.12883 2021 7 29 59424 0.2342 0.3955 -0.12811 2021 7 30 59425 0.2350 0.3941 -0.12738 2021 7 31 59426 0.2357 0.3926 -0.12656 2021 8 1 59427 0.2365 0.3911 -0.12562 2021 8 2 59428 0.2372 0.3896 -0.12452 2021 8 3 59429 0.2378 0.3881 -0.12326 2021 8 4 59430 0.2385 0.3866 -0.12186 2021 8 5 59431 0.2391 0.3851 -0.12034 2021 8 6 59432 0.2397 0.3835 -0.11876 2021 8 7 59433 0.2403 0.3820 -0.11719 2021 8 8 59434 0.2408 0.3804 -0.11570 2021 8 9 59435 0.2413 0.3788 -0.11437 2021 8 10 59436 0.2418 0.3773 -0.11323 2021 8 11 59437 0.2422 0.3757 -0.11229 2021 8 12 59438 0.2426 0.3741 -0.11153 2021 8 13 59439 0.2430 0.3725 -0.11086 2021 8 14 59440 0.2434 0.3709 -0.11020 2021 8 15 59441 0.2437 0.3692 -0.10946 2021 8 16 59442 0.2440 0.3676 -0.10858 2021 8 17 59443 0.2443 0.3660 -0.10753 2021 8 18 59444 0.2445 0.3643 -0.10635 2021 8 19 59445 0.2447 0.3627 -0.10511 2021 8 20 59446 0.2449 0.3611 -0.10393 2021 8 21 59447 0.2450 0.3594 -0.10291 2021 8 22 59448 0.2451 0.3577 -0.10213 2021 8 23 59449 0.2452 0.3561 -0.10160 2021 8 24 59450 0.2452 0.3544 -0.10129 2021 8 25 59451 0.2453 0.3528 -0.10113 2021 8 26 59452 0.2453 0.3511 -0.10102 2021 8 27 59453 0.2452 0.3494 -0.10087 2021 8 28 59454 0.2451 0.3478 -0.10061 2021 8 29 59455 0.2450 0.3461 -0.10019 2021 8 30 59456 0.2449 0.3444 -0.09957 2021 8 31 59457 0.2447 0.3428 -0.09876 2021 9 1 59458 0.2445 0.3411 -0.09780 2021 9 2 59459 0.2443 0.3394 -0.09674 2021 9 3 59460 0.2440 0.3378 -0.09567 2021 9 4 59461 0.2437 0.3361 -0.09469 2021 9 5 59462 0.2434 0.3344 -0.09389 2021 9 6 59463 0.2430 0.3328 -0.09334 2021 9 7 59464 0.2426 0.3311 -0.09305 2021 9 8 59465 0.2422 0.3295 -0.09299 2021 9 9 59466 0.2418 0.3278 -0.09307 2021 9 10 59467 0.2413 0.3262 -0.09317 2021 9 11 59468 0.2408 0.3246 -0.09316 2021 9 12 59469 0.2402 0.3229 -0.09292 2021 9 13 59470 0.2396 0.3213 -0.09241 2021 9 14 59471 0.2390 0.3197 -0.09168 2021 9 15 59472 0.2384 0.3181 -0.09082 2021 9 16 59473 0.2377 0.3165 -0.08998 2021 9 17 59474 0.2370 0.3149 -0.08930 2021 9 18 59475 0.2363 0.3133 -0.08879 2021 9 19 59476 0.2355 0.3118 -0.08850 2021 9 20 59477 0.2348 0.3102 -0.08844 2021 9 21 59478 0.2339 0.3086 -0.08851 2021 9 22 59479 0.2331 0.3071 -0.08862 2021 9 23 59480 0.2322 0.3056 -0.08871 2021 9 24 59481 0.2313 0.3041 -0.08876 2021 9 25 59482 0.2304 0.3026 -0.08868 2021 9 26 59483 0.2294 0.3011 -0.08845 2021 9 27 59484 0.2284 0.2996 -0.08809 2021 9 28 59485 0.2274 0.2981 -0.08768 2021 9 29 59486 0.2264 0.2967 -0.08720 2021 9 30 59487 0.2253 0.2952 -0.08667 2021 10 1 59488 0.2242 0.2938 -0.08620 2021 10 2 59489 0.2231 0.2924 -0.08584 2021 10 3 59490 0.2219 0.2910 -0.08567 2021 10 4 59491 0.2207 0.2896 -0.08575 2021 10 5 59492 0.2195 0.2883 -0.08612 2021 10 6 59493 0.2183 0.2869 -0.08672 2021 10 7 59494 0.2170 0.2856 -0.08743 2021 10 8 59495 0.2158 0.2843 -0.08811 2021 10 9 59496 0.2145 0.2830 -0.08872 2021 10 10 59497 0.2131 0.2817 -0.08906 2021 10 11 59498 0.2118 0.2805 -0.08915 2021 10 12 59499 0.2104 0.2793 -0.08908 2021 10 13 59500 0.2090 0.2781 -0.08888 2021 10 14 59501 0.2076 0.2769 -0.08864 2021 10 15 59502 0.2061 0.2757 -0.08850 2021 10 16 59503 0.2047 0.2745 -0.08861 2021 10 17 59504 0.2032 0.2734 -0.08902 2021 10 18 59505 0.2017 0.2723 -0.08962 2021 10 19 59506 0.2001 0.2712 -0.09041 2021 10 20 59507 0.1986 0.2701 -0.09121 2021 10 21 59508 0.1970 0.2691 -0.09195 2021 10 22 59509 0.1954 0.2681 -0.09257 2021 10 23 59510 0.1938 0.2671 -0.09299 2021 10 24 59511 0.1922 0.2661 -0.09327 2021 10 25 59512 0.1905 0.2652 -0.09343 2021 10 26 59513 0.1888 0.2642 -0.09351 2021 10 27 59514 0.1872 0.2633 -0.09354 2021 10 28 59515 0.1854 0.2625 -0.09358 2021 10 29 59516 0.1837 0.2616 -0.09373 2021 10 30 59517 0.1820 0.2608 -0.09409 2021 10 31 59518 0.1802 0.2600 -0.09471 2021 11 1 59519 0.1785 0.2592 -0.09564 2021 11 2 59520 0.1767 0.2584 -0.09679 2021 11 3 59521 0.1749 0.2577 -0.09807 2021 11 4 59522 0.1731 0.2570 -0.09941 2021 11 5 59523 0.1713 0.2564 -0.10065 2021 11 6 59524 0.1694 0.2557 -0.10169 2021 11 7 59525 0.1676 0.2551 -0.10245 2021 11 8 59526 0.1657 0.2545 -0.10297 2021 11 9 59527 0.1639 0.2539 -0.10338 2021 11 10 59528 0.1620 0.2534 -0.10372 2021 11 11 59529 0.1601 0.2529 -0.10411 2021 11 12 59530 0.1582 0.2524 -0.10464 2021 11 13 59531 0.1563 0.2520 -0.10532 2021 11 14 59532 0.1544 0.2516 -0.10619 2021 11 15 59533 0.1524 0.2512 -0.10715 2021 11 16 59534 0.1505 0.2508 -0.10808 2021 11 17 59535 0.1486 0.2505 -0.10895 2021 11 18 59536 0.1466 0.2502 -0.10971 2021 11 19 59537 0.1446 0.2499 -0.11020 2021 11 20 59538 0.1427 0.2496 -0.11050 2021 11 21 59539 0.1407 0.2494 -0.11061 2021 11 22 59540 0.1388 0.2492 -0.11051 2021 11 23 59541 0.1368 0.2491 -0.11034 2021 11 24 59542 0.1348 0.2489 -0.11019 2021 11 25 59543 0.1328 0.2488 -0.11010 2021 11 26 59544 0.1309 0.2488 -0.11012 2021 11 27 59545 0.1289 0.2487 -0.11030 2021 11 28 59546 0.1269 0.2487 -0.11070 2021 11 29 59547 0.1249 0.2487 -0.11132 2021 11 30 59548 0.1229 0.2488 -0.11211 2021 12 1 59549 0.1209 0.2488 -0.11291 2021 12 2 59550 0.1190 0.2490 -0.11362 2021 12 3 59551 0.1170 0.2491 -0.11414 2021 12 4 59552 0.1150 0.2493 -0.11439 2021 12 5 59553 0.1130 0.2495 -0.11436 2021 12 6 59554 0.1111 0.2497 -0.11411 2021 12 7 59555 0.1091 0.2499 -0.11382 2021 12 8 59556 0.1071 0.2502 -0.11368 2021 12 9 59557 0.1052 0.2505 -0.11370 2021 12 10 59558 0.1032 0.2509 -0.11390 2021 12 11 59559 0.1013 0.2513 -0.11420 2021 12 12 59560 0.0994 0.2517 -0.11459 2021 12 13 59561 0.0974 0.2521 -0.11508 2021 12 14 59562 0.0955 0.2526 -0.11560 2021 12 15 59563 0.0936 0.2531 -0.11610 2021 12 16 59564 0.0917 0.2536 -0.11647 2021 12 17 59565 0.0898 0.2541 -0.11670 2021 12 18 59566 0.0879 0.2547 -0.11677 2021 12 19 59567 0.0860 0.2553 -0.11668 2021 12 20 59568 0.0842 0.2560 -0.11646 2021 12 21 59569 0.0823 0.2567 -0.11619 2021 12 22 59570 0.0805 0.2573 -0.11593 2021 12 23 59571 0.0787 0.2581 -0.11575 2021 12 24 59572 0.0769 0.2588 -0.11569 2021 12 25 59573 0.0751 0.2596 -0.11577 2021 12 26 59574 0.0733 0.2604 -0.11604 2021 12 27 59575 0.0715 0.2613 -0.11644 2021 12 28 59576 0.0698 0.2621 -0.11690 2021 12 29 59577 0.0680 0.2630 -0.11732 2021 12 30 59578 0.0663 0.2639 -0.11763 2021 12 31 59579 0.0646 0.2649 -0.11770 2022 1 1 59580 0.0629 0.2658 -0.11750 2022 1 2 59581 0.0612 0.2668 -0.11711 2022 1 3 59582 0.0596 0.2679 -0.11664 2022 1 4 59583 0.0580 0.2689 -0.11626 2022 1 5 59584 0.0563 0.2700 -0.11600 2022 1 6 59585 0.0548 0.2711 -0.11598 2022 1 7 59586 0.0532 0.2722 -0.11622 2022 1 8 59587 0.0516 0.2734 -0.11662 2022 1 9 59588 0.0501 0.2745 -0.11710 2022 1 10 59589 0.0486 0.2757 -0.11759 2022 1 11 59590 0.0471 0.2770 -0.11800 2022 1 12 59591 0.0456 0.2782 -0.11824 2022 1 13 59592 0.0442 0.2795 -0.11835 2022 1 14 59593 0.0428 0.2808 -0.11829 2022 1 15 59594 0.0414 0.2821 -0.11809 2022 1 16 59595 0.0400 0.2834 -0.11785 2022 1 17 59596 0.0387 0.2848 -0.11761 2022 1 18 59597 0.0374 0.2862 -0.11738 2022 1 19 59598 0.0361 0.2876 -0.11726 2022 1 20 59599 0.0348 0.2890 -0.11736 2022 1 21 59600 0.0336 0.2904 -0.11771 2022 1 22 59601 0.0323 0.2919 -0.11825 2022 1 23 59602 0.0312 0.2934 -0.11895 2022 1 24 59603 0.0300 0.2949 -0.11975 2022 1 25 59604 0.0289 0.2964 -0.12055 2022 1 26 59605 0.0278 0.2979 -0.12126 2022 1 27 59606 0.0267 0.2995 -0.12181 2022 1 28 59607 0.0256 0.3010 -0.12212 2022 1 29 59608 0.0246 0.3026 -0.12222 2022 1 30 59609 0.0236 0.3042 -0.12220 2022 1 31 59610 0.0227 0.3059 -0.12219 2022 2 1 59611 0.0217 0.3075 -0.12236 2022 2 2 59612 0.0208 0.3091 -0.12279 2022 2 3 59613 0.0200 0.3108 -0.12342 2022 2 4 59614 0.0191 0.3125 -0.12413 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) 59227 -109.42 0.65 -5.59 0.15 59228 -109.10 0.65 -5.70 0.15 59229 -108.81 0.65 -5.88 0.15 59230 -108.60 0.81 -6.00 0.06 59231 -108.56 0.69 -5.97 0.14 59232 -108.73 0.69 -5.84 0.14 59233 -109.00 0.56 -5.74 0.19 59234 -109.26 0.58 -5.72 0.14 59235 -109.40 0.58 -5.71 0.14 59236 -109.40 0.58 -5.61 0.14 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 59227 0.236 0.259 0.099 0.147 59228 0.247 0.259 0.094 0.147 59229 0.256 0.259 0.089 0.147 59230 0.259 0.322 0.086 0.058 59231 0.259 0.274 0.084 0.144 59232 0.255 0.274 0.082 0.144 59233 0.251 0.221 0.079 0.194 59234 0.246 0.230 0.073 0.137 59235 0.242 0.230 0.066 0.137 59236 0.238 0.230 0.057 0.137 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).