********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 29 April 2021 Vol. XXXIV No. 017 ______________________________________________________________________ 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 * * * * The US Naval Observatory's Rapid Service/Prediction Center website * * (maia.usno.navy.mil) must undergo modernization and has been * * offline since 24 October 2019. The expected completion of work and * * return of service will be no earlier than Summer of 2021. * * * * Although the Bulletin A makes several references to maia, the * * paragraph above supersedes any information contained in the * * Bulletin A text. * * * * Updated EOPs are available at NASA's Archive of Space Geodesy Data: * * https://cddis.nasa.gov/archive/products/iers * * ftps://gdc.cddis.eosdis.nasa.gov/products/iers * * Daily EOP data may be available here by 18:00 UTC, and Bulletin A * * EOP data may be available by 20:00 UTC. * * For additional information on accessing CDDIS, please refer to: * * https://cddis.nasa.gov/About/CDDIS_File_Download_FAQ.html * * * * Updated EOPs may also 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. * * * * Users should verify results obtained from these sites; we cannot * * guarantee the integrity or timeliness of files provided at * * third-party sites. * * * * 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 4 23 59327 0.09955 .00009 0.43114 .00009 -0.178506 0.000010 21 4 24 59328 0.09985 .00009 0.43203 .00009 -0.179153 0.000010 21 4 25 59329 0.10004 .00009 0.43275 .00009 -0.179962 0.000010 21 4 26 59330 0.10047 .00009 0.43336 .00009 -0.180885 0.000011 21 4 27 59331 0.10138 .00009 0.43388 .00009 -0.181882 0.000011 21 4 28 59332 0.10264 .00009 0.43439 .00009 -0.182695 0.000013 21 4 29 59333 0.10401 .00009 0.43489 .00009 -0.183196 0.000017 _______________________________________________________________________ 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 = 0.1232 - 0.0346 cos A + 0.1061 sin A + 0.0149 cos C - 0.0293 sin C y = 0.3638 + 0.0974 cos A + 0.0341 sin A - 0.0293 cos C - 0.0149 sin C UT1-UTC = -0.1454 + 0.00026 (MJD - 59341) - (UT2-UT1) where A = 2*pi*(MJD-59333)/365.25 and C = 2*pi*(MJD-59333)/435. TAI-UTC(MJD 59334) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59333)**0.80 S t = 0.00025 (MJD-59333)**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 4 30 59334 0.1055 0.4354 -0.18338 2021 5 1 59335 0.1070 0.4359 -0.18331 2021 5 2 59336 0.1085 0.4364 -0.18309 2021 5 3 59337 0.1100 0.4369 -0.18283 2021 5 4 59338 0.1114 0.4375 -0.18260 2021 5 5 59339 0.1128 0.4380 -0.18249 2021 5 6 59340 0.1142 0.4385 -0.18250 2021 5 7 59341 0.1155 0.4389 -0.18261 2021 5 8 59342 0.1169 0.4393 -0.18277 2021 5 9 59343 0.1183 0.4396 -0.18291 2021 5 10 59344 0.1197 0.4398 -0.18300 2021 5 11 59345 0.1212 0.4400 -0.18303 2021 5 12 59346 0.1228 0.4401 -0.18294 2021 5 13 59347 0.1244 0.4403 -0.18271 2021 5 14 59348 0.1260 0.4404 -0.18230 2021 5 15 59349 0.1277 0.4406 -0.18178 2021 5 16 59350 0.1293 0.4407 -0.18120 2021 5 17 59351 0.1310 0.4409 -0.18063 2021 5 18 59352 0.1326 0.4410 -0.18011 2021 5 19 59353 0.1342 0.4411 -0.17972 2021 5 20 59354 0.1357 0.4412 -0.17952 2021 5 21 59355 0.1373 0.4412 -0.17954 2021 5 22 59356 0.1389 0.4412 -0.17979 2021 5 23 59357 0.1405 0.4412 -0.18019 2021 5 24 59358 0.1421 0.4411 -0.18060 2021 5 25 59359 0.1437 0.4410 -0.18088 2021 5 26 59360 0.1453 0.4409 -0.18090 2021 5 27 59361 0.1469 0.4408 -0.18059 2021 5 28 59362 0.1485 0.4406 -0.18000 2021 5 29 59363 0.1501 0.4405 -0.17923 2021 5 30 59364 0.1517 0.4403 -0.17841 2021 5 31 59365 0.1533 0.4401 -0.17763 2021 6 1 59366 0.1549 0.4399 -0.17695 2021 6 2 59367 0.1565 0.4396 -0.17637 2021 6 3 59368 0.1581 0.4394 -0.17588 2021 6 4 59369 0.1597 0.4391 -0.17544 2021 6 5 59370 0.1612 0.4387 -0.17498 2021 6 6 59371 0.1628 0.4384 -0.17446 2021 6 7 59372 0.1644 0.4380 -0.17383 2021 6 8 59373 0.1659 0.4376 -0.17306 2021 6 9 59374 0.1675 0.4371 -0.17211 2021 6 10 59375 0.1691 0.4367 -0.17100 2021 6 11 59376 0.1706 0.4362 -0.16973 2021 6 12 59377 0.1722 0.4357 -0.16837 2021 6 13 59378 0.1737 0.4351 -0.16696 2021 6 14 59379 0.1752 0.4346 -0.16560 2021 6 15 59380 0.1767 0.4340 -0.16437 2021 6 16 59381 0.1783 0.4334 -0.16332 2021 6 17 59382 0.1798 0.4328 -0.16250 2021 6 18 59383 0.1812 0.4321 -0.16191 2021 6 19 59384 0.1827 0.4314 -0.16150 2021 6 20 59385 0.1842 0.4307 -0.16119 2021 6 21 59386 0.1857 0.4300 -0.16084 2021 6 22 59387 0.1871 0.4292 -0.16033 2021 6 23 59388 0.1885 0.4284 -0.15958 2021 6 24 59389 0.1900 0.4276 -0.15858 2021 6 25 59390 0.1914 0.4268 -0.15739 2021 6 26 59391 0.1928 0.4259 -0.15612 2021 6 27 59392 0.1942 0.4251 -0.15489 2021 6 28 59393 0.1955 0.4242 -0.15377 2021 6 29 59394 0.1969 0.4233 -0.15280 2021 6 30 59395 0.1982 0.4223 -0.15194 2021 7 1 59396 0.1996 0.4214 -0.15115 2021 7 2 59397 0.2009 0.4204 -0.15037 2021 7 3 59398 0.2022 0.4194 -0.14955 2021 7 4 59399 0.2034 0.4183 -0.14862 2021 7 5 59400 0.2047 0.4173 -0.14756 2021 7 6 59401 0.2059 0.4162 -0.14635 2021 7 7 59402 0.2072 0.4151 -0.14497 2021 7 8 59403 0.2084 0.4140 -0.14345 2021 7 9 59404 0.2095 0.4129 -0.14184 2021 7 10 59405 0.2107 0.4118 -0.14019 2021 7 11 59406 0.2119 0.4106 -0.13858 2021 7 12 59407 0.2130 0.4094 -0.13709 2021 7 13 59408 0.2141 0.4082 -0.13578 2021 7 14 59409 0.2152 0.4070 -0.13469 2021 7 15 59410 0.2162 0.4057 -0.13382 2021 7 16 59411 0.2173 0.4045 -0.13312 2021 7 17 59412 0.2183 0.4032 -0.13251 2021 7 18 59413 0.2193 0.4019 -0.13189 2021 7 19 59414 0.2203 0.4006 -0.13116 2021 7 20 59415 0.2212 0.3993 -0.13022 2021 7 21 59416 0.2221 0.3979 -0.12906 2021 7 22 59417 0.2230 0.3966 -0.12771 2021 7 23 59418 0.2239 0.3952 -0.12627 2021 7 24 59419 0.2248 0.3938 -0.12486 2021 7 25 59420 0.2256 0.3924 -0.12358 2021 7 26 59421 0.2264 0.3910 -0.12246 2021 7 27 59422 0.2272 0.3896 -0.12152 2021 7 28 59423 0.2279 0.3882 -0.12069 2021 7 29 59424 0.2287 0.3867 -0.11992 2021 7 30 59425 0.2294 0.3852 -0.11914 2021 7 31 59426 0.2301 0.3838 -0.11827 2021 8 1 59427 0.2307 0.3823 -0.11729 2021 8 2 59428 0.2313 0.3808 -0.11617 2021 8 3 59429 0.2319 0.3792 -0.11489 2021 8 4 59430 0.2325 0.3777 -0.11349 2021 8 5 59431 0.2330 0.3762 -0.11199 2021 8 6 59432 0.2335 0.3746 -0.11046 2021 8 7 59433 0.2340 0.3731 -0.10897 2021 8 8 59434 0.2345 0.3715 -0.10759 2021 8 9 59435 0.2349 0.3700 -0.10640 2021 8 10 59436 0.2353 0.3684 -0.10545 2021 8 11 59437 0.2357 0.3668 -0.10474 2021 8 12 59438 0.2360 0.3652 -0.10423 2021 8 13 59439 0.2363 0.3636 -0.10384 2021 8 14 59440 0.2366 0.3620 -0.10346 2021 8 15 59441 0.2369 0.3604 -0.10298 2021 8 16 59442 0.2371 0.3588 -0.10230 2021 8 17 59443 0.2373 0.3572 -0.10140 2021 8 18 59444 0.2374 0.3555 -0.10032 2021 8 19 59445 0.2376 0.3539 -0.09914 2021 8 20 59446 0.2377 0.3523 -0.09796 2021 8 21 59447 0.2378 0.3507 -0.09689 2021 8 22 59448 0.2378 0.3490 -0.09599 2021 8 23 59449 0.2378 0.3474 -0.09529 2021 8 24 59450 0.2378 0.3457 -0.09475 2021 8 25 59451 0.2378 0.3441 -0.09432 2021 8 26 59452 0.2377 0.3425 -0.09390 2021 8 27 59453 0.2376 0.3408 -0.09344 2021 8 28 59454 0.2374 0.3392 -0.09287 2021 8 29 59455 0.2373 0.3375 -0.09216 2021 8 30 59456 0.2371 0.3359 -0.09130 2021 8 31 59457 0.2368 0.3343 -0.09031 2021 9 1 59458 0.2366 0.3326 -0.08922 2021 9 2 59459 0.2363 0.3310 -0.08807 2021 9 3 59460 0.2360 0.3294 -0.08695 2021 9 4 59461 0.2356 0.3278 -0.08592 2021 9 5 59462 0.2352 0.3261 -0.08506 2021 9 6 59463 0.2348 0.3245 -0.08445 2021 9 7 59464 0.2344 0.3229 -0.08410 2021 9 8 59465 0.2339 0.3213 -0.08399 2021 9 9 59466 0.2334 0.3197 -0.08405 2021 9 10 59467 0.2329 0.3181 -0.08415 2021 9 11 59468 0.2323 0.3165 -0.08416 2021 9 12 59469 0.2317 0.3150 -0.08398 2021 9 13 59470 0.2311 0.3134 -0.08358 2021 9 14 59471 0.2305 0.3118 -0.08296 2021 9 15 59472 0.2298 0.3103 -0.08222 2021 9 16 59473 0.2291 0.3087 -0.08146 2021 9 17 59474 0.2283 0.3072 -0.08077 2021 9 18 59475 0.2276 0.3057 -0.08025 2021 9 19 59476 0.2268 0.3042 -0.07992 2021 9 20 59477 0.2259 0.3027 -0.07979 2021 9 21 59478 0.2251 0.3012 -0.07978 2021 9 22 59479 0.2242 0.2997 -0.07984 2021 9 23 59480 0.2233 0.2983 -0.07987 2021 9 24 59481 0.2224 0.2968 -0.07982 2021 9 25 59482 0.2214 0.2954 -0.07964 2021 9 26 59483 0.2204 0.2939 -0.07930 2021 9 27 59484 0.2194 0.2925 -0.07882 2021 9 28 59485 0.2183 0.2911 -0.07821 2021 9 29 59486 0.2173 0.2898 -0.07753 2021 9 30 59487 0.2162 0.2884 -0.07684 2021 10 1 59488 0.2150 0.2871 -0.07622 2021 10 2 59489 0.2139 0.2857 -0.07574 2021 10 3 59490 0.2127 0.2844 -0.07547 2021 10 4 59491 0.2115 0.2831 -0.07547 2021 10 5 59492 0.2103 0.2818 -0.07574 2021 10 6 59493 0.2090 0.2806 -0.07623 2021 10 7 59494 0.2077 0.2793 -0.07682 2021 10 8 59495 0.2064 0.2781 -0.07737 2021 10 9 59496 0.2051 0.2769 -0.07775 2021 10 10 59497 0.2038 0.2757 -0.07787 2021 10 11 59498 0.2024 0.2746 -0.07775 2021 10 12 59499 0.2010 0.2734 -0.07744 2021 10 13 59500 0.1996 0.2723 -0.07707 2021 10 14 59501 0.1982 0.2712 -0.07673 2021 10 15 59502 0.1967 0.2701 -0.07653 2021 10 16 59503 0.1952 0.2690 -0.07651 2021 10 17 59504 0.1937 0.2680 -0.07666 2021 10 18 59505 0.1922 0.2670 -0.07695 2021 10 19 59506 0.1906 0.2660 -0.07731 2021 10 20 59507 0.1891 0.2650 -0.07768 2021 10 21 59508 0.1875 0.2641 -0.07798 2021 10 22 59509 0.1859 0.2632 -0.07816 2021 10 23 59510 0.1843 0.2623 -0.07818 2021 10 24 59511 0.1826 0.2614 -0.07803 2021 10 25 59512 0.1810 0.2605 -0.07775 2021 10 26 59513 0.1793 0.2597 -0.07736 2021 10 27 59514 0.1776 0.2589 -0.07694 2021 10 28 59515 0.1759 0.2581 -0.07655 2021 10 29 59516 0.1742 0.2574 -0.07626 2021 10 30 59517 0.1725 0.2567 -0.07616 2021 10 31 59518 0.1707 0.2560 -0.07629 2021 11 1 59519 0.1690 0.2553 -0.07669 2021 11 2 59520 0.1672 0.2547 -0.07734 2021 11 3 59521 0.1654 0.2540 -0.07817 2021 11 4 59522 0.1636 0.2534 -0.07905 2021 11 5 59523 0.1618 0.2529 -0.07982 2021 11 6 59524 0.1599 0.2523 -0.08037 2021 11 7 59525 0.1581 0.2518 -0.08065 2021 11 8 59526 0.1562 0.2514 -0.08070 2021 11 9 59527 0.1544 0.2509 -0.08062 2021 11 10 59528 0.1525 0.2505 -0.08053 2021 11 11 59529 0.1506 0.2501 -0.08052 2021 11 12 59530 0.1487 0.2497 -0.08067 2021 11 13 59531 0.1468 0.2494 -0.08096 2021 11 14 59532 0.1449 0.2491 -0.08137 2021 11 15 59533 0.1430 0.2488 -0.08185 2021 11 16 59534 0.1411 0.2485 -0.08233 2021 11 17 59535 0.1392 0.2483 -0.08275 2021 11 18 59536 0.1372 0.2481 -0.08305 2021 11 19 59537 0.1353 0.2479 -0.08319 2021 11 20 59538 0.1334 0.2478 -0.08316 2021 11 21 59539 0.1314 0.2477 -0.08296 2021 11 22 59540 0.1295 0.2476 -0.08264 2021 11 23 59541 0.1275 0.2476 -0.08222 2021 11 24 59542 0.1256 0.2476 -0.08177 2021 11 25 59543 0.1236 0.2476 -0.08134 2021 11 26 59544 0.1216 0.2476 -0.08099 2021 11 27 59545 0.1197 0.2477 -0.08078 2021 11 28 59546 0.1177 0.2478 -0.08075 2021 11 29 59547 0.1158 0.2479 -0.08091 2021 11 30 59548 0.1138 0.2481 -0.08123 2021 12 1 59549 0.1118 0.2483 -0.08162 2021 12 2 59550 0.1099 0.2485 -0.08196 2021 12 3 59551 0.1079 0.2488 -0.08212 2021 12 4 59552 0.1060 0.2490 -0.08201 2021 12 5 59553 0.1040 0.2493 -0.08164 2021 12 6 59554 0.1021 0.2497 -0.08111 2021 12 7 59555 0.1001 0.2501 -0.08054 2021 12 8 59556 0.0982 0.2505 -0.08002 2021 12 9 59557 0.0963 0.2509 -0.07961 2021 12 10 59558 0.0944 0.2513 -0.07930 2021 12 11 59559 0.0924 0.2518 -0.07908 2021 12 12 59560 0.0905 0.2523 -0.07898 2021 12 13 59561 0.0886 0.2529 -0.07889 2021 12 14 59562 0.0867 0.2535 -0.07878 2021 12 15 59563 0.0849 0.2541 -0.07857 2021 12 16 59564 0.0830 0.2547 -0.07835 2021 12 17 59565 0.0811 0.2554 -0.07810 2021 12 18 59566 0.0793 0.2561 -0.07767 2021 12 19 59567 0.0774 0.2568 -0.07709 2021 12 20 59568 0.0756 0.2575 -0.07638 2021 12 21 59569 0.0738 0.2583 -0.07562 2021 12 22 59570 0.0720 0.2591 -0.07487 2021 12 23 59571 0.0702 0.2599 -0.07422 2021 12 24 59572 0.0684 0.2608 -0.07374 2021 12 25 59573 0.0666 0.2617 -0.07347 2021 12 26 59574 0.0649 0.2626 -0.07345 2021 12 27 59575 0.0631 0.2635 -0.07364 2021 12 28 59576 0.0614 0.2645 -0.07398 2021 12 29 59577 0.0597 0.2655 -0.07431 2021 12 30 59578 0.0580 0.2665 -0.07448 2021 12 31 59579 0.0564 0.2676 -0.07445 2022 1 1 59580 0.0547 0.2686 -0.07415 2022 1 2 59581 0.0531 0.2697 -0.07354 2022 1 3 59582 0.0515 0.2708 -0.07284 2022 1 4 59583 0.0499 0.2720 -0.07216 2022 1 5 59584 0.0483 0.2732 -0.07161 2022 1 6 59585 0.0467 0.2744 -0.07121 2022 1 7 59586 0.0452 0.2756 -0.07098 2022 1 8 59587 0.0437 0.2768 -0.07086 2022 1 9 59588 0.0422 0.2781 -0.07072 2022 1 10 59589 0.0407 0.2794 -0.07051 2022 1 11 59590 0.0393 0.2807 -0.07021 2022 1 12 59591 0.0378 0.2820 -0.06971 2022 1 13 59592 0.0364 0.2834 -0.06906 2022 1 14 59593 0.0351 0.2848 -0.06831 2022 1 15 59594 0.0337 0.2862 -0.06752 2022 1 16 59595 0.0324 0.2876 -0.06667 2022 1 17 59596 0.0311 0.2890 -0.06586 2022 1 18 59597 0.0298 0.2905 -0.06515 2022 1 19 59598 0.0285 0.2920 -0.06455 2022 1 20 59599 0.0273 0.2935 -0.06410 2022 1 21 59600 0.0261 0.2950 -0.06385 2022 1 22 59601 0.0249 0.2965 -0.06378 2022 1 23 59602 0.0237 0.2981 -0.06382 2022 1 24 59603 0.0226 0.2996 -0.06408 2022 1 25 59604 0.0215 0.3012 -0.06440 2022 1 26 59605 0.0204 0.3028 -0.06463 2022 1 27 59606 0.0194 0.3045 -0.06474 2022 1 28 59607 0.0184 0.3061 -0.06475 2022 1 29 59608 0.0174 0.3078 -0.06461 2022 1 30 59609 0.0164 0.3094 -0.06436 2022 1 31 59610 0.0155 0.3111 -0.06417 2022 2 1 59611 0.0146 0.3128 -0.06416 2022 2 2 59612 0.0138 0.3145 -0.06442 2022 2 3 59613 0.0129 0.3163 -0.06496 2022 2 4 59614 0.0121 0.3180 -0.06563 2022 2 5 59615 0.0113 0.3198 -0.06639 2022 2 6 59616 0.0106 0.3215 -0.06711 2022 2 7 59617 0.0099 0.3233 -0.06769 2022 2 8 59618 0.0092 0.3251 -0.06815 2022 2 9 59619 0.0085 0.3269 -0.06839 2022 2 10 59620 0.0079 0.3287 -0.06839 2022 2 11 59621 0.0073 0.3305 -0.06821 2022 2 12 59622 0.0068 0.3324 -0.06783 2022 2 13 59623 0.0063 0.3342 -0.06733 2022 2 14 59624 0.0058 0.3361 -0.06680 2022 2 15 59625 0.0053 0.3379 -0.06630 2022 2 16 59626 0.0049 0.3398 -0.06597 2022 2 17 59627 0.0045 0.3416 -0.06590 2022 2 18 59628 0.0041 0.3435 -0.06607 2022 2 19 59629 0.0038 0.3454 -0.06645 2022 2 20 59630 0.0035 0.3473 -0.06700 2022 2 21 59631 0.0033 0.3492 -0.06759 2022 2 22 59632 0.0030 0.3511 -0.06807 2022 2 23 59633 0.0029 0.3530 -0.06836 2022 2 24 59634 0.0027 0.3549 -0.06845 2022 2 25 59635 0.0026 0.3568 -0.06834 2022 2 26 59636 0.0025 0.3587 -0.06804 2022 2 27 59637 0.0024 0.3606 -0.06766 2022 2 28 59638 0.0024 0.3625 -0.06733 2022 3 1 59639 0.0024 0.3644 -0.06719 2022 3 2 59640 0.0025 0.3663 -0.06727 2022 3 3 59641 0.0026 0.3682 -0.06761 2022 3 4 59642 0.0027 0.3702 -0.06818 2022 3 5 59643 0.0028 0.3721 -0.06877 2022 3 6 59644 0.0030 0.3740 -0.06933 2022 3 7 59645 0.0032 0.3759 -0.06979 2022 3 8 59646 0.0035 0.3778 -0.07007 2022 3 9 59647 0.0038 0.3797 -0.07013 2022 3 10 59648 0.0041 0.3816 -0.07003 2022 3 11 59649 0.0044 0.3835 -0.06984 2022 3 12 59650 0.0048 0.3853 -0.06958 2022 3 13 59651 0.0052 0.3872 -0.06933 2022 3 14 59652 0.0057 0.3891 -0.06917 2022 3 15 59653 0.0062 0.3910 -0.06922 2022 3 16 59654 0.0067 0.3928 -0.06948 2022 3 17 59655 0.0073 0.3947 -0.06994 2022 3 18 59656 0.0079 0.3965 -0.07063 2022 3 19 59657 0.0085 0.3983 -0.07146 2022 3 20 59658 0.0091 0.4002 -0.07233 2022 3 21 59659 0.0098 0.4020 -0.07313 2022 3 22 59660 0.0105 0.4038 -0.07380 2022 3 23 59661 0.0113 0.4056 -0.07424 2022 3 24 59662 0.0121 0.4074 -0.07448 2022 3 25 59663 0.0129 0.4091 -0.07453 2022 3 26 59664 0.0137 0.4109 -0.07463 2022 3 27 59665 0.0146 0.4126 -0.07474 2022 3 28 59666 0.0155 0.4144 -0.07500 2022 3 29 59667 0.0165 0.4161 -0.07550 2022 3 30 59668 0.0175 0.4178 -0.07615 2022 3 31 59669 0.0185 0.4195 -0.07689 2022 4 1 59670 0.0195 0.4212 -0.07766 2022 4 2 59671 0.0206 0.4228 -0.07848 2022 4 3 59672 0.0216 0.4245 -0.07931 2022 4 4 59673 0.0228 0.4261 -0.08001 2022 4 5 59674 0.0239 0.4277 -0.08062 2022 4 6 59675 0.0251 0.4293 -0.08105 2022 4 7 59676 0.0263 0.4309 -0.08133 2022 4 8 59677 0.0276 0.4324 -0.08150 2022 4 9 59678 0.0288 0.4340 -0.08160 2022 4 10 59679 0.0301 0.4355 -0.08175 2022 4 11 59680 0.0314 0.4370 -0.08206 2022 4 12 59681 0.0328 0.4385 -0.08255 2022 4 13 59682 0.0342 0.4399 -0.08325 2022 4 14 59683 0.0356 0.4414 -0.08419 2022 4 15 59684 0.0370 0.4428 -0.08532 2022 4 16 59685 0.0385 0.4442 -0.08663 2022 4 17 59686 0.0399 0.4456 -0.08795 2022 4 18 59687 0.0414 0.4469 -0.08919 2022 4 19 59688 0.0430 0.4483 -0.09018 2022 4 20 59689 0.0445 0.4496 -0.09086 2022 4 21 59690 0.0461 0.4508 -0.09135 2022 4 22 59691 0.0477 0.4521 -0.09173 2022 4 23 59692 0.0493 0.4533 -0.09213 2022 4 24 59693 0.0510 0.4545 -0.09266 2022 4 25 59694 0.0526 0.4557 -0.09333 2022 4 26 59695 0.0543 0.4569 -0.09424 2022 4 27 59696 0.0560 0.4580 -0.09524 2022 4 28 59697 0.0577 0.4591 -0.09627 2022 4 29 59698 0.0595 0.4602 -0.09728 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) 59312 -105.81 0.57 -9.21 0.09 59313 -105.64 0.57 -9.19 0.09 59314 -105.68 0.57 -9.00 0.09 59315 -105.82 0.64 -8.72 0.02 59316 -105.93 0.64 -8.55 0.02 59317 -105.93 0.32 -8.62 0.16 59318 -105.84 0.63 -8.86 0.02 59319 -105.71 0.63 -9.10 0.02 59320 -105.64 0.63 -9.28 0.02 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 59312 0.227 0.228 0.044 0.095 59313 0.244 0.228 0.025 0.095 59314 0.259 0.228 0.008 0.095 59315 0.269 0.255 -0.006 0.017 59316 0.274 0.255 -0.015 0.017 59317 0.275 0.128 -0.021 0.160 59318 0.273 0.250 -0.025 0.015 59319 0.269 0.250 -0.028 0.015 59320 0.265 0.250 -0.029 0.015 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).