********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 15 April 2021 Vol. XXXIV No. 015 ______________________________________________________________________ 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 9 59313 0.08757 .00009 0.41882 .00009 -0.175278 0.000021 21 4 10 59314 0.08745 .00009 0.41987 .00009 -0.175753 0.000021 21 4 11 59315 0.08710 .00009 0.42073 .00009 -0.176296 0.000022 21 4 12 59316 0.08683 .00009 0.42136 .00009 -0.176849 0.000021 21 4 13 59317 0.08698 .00009 0.42189 .00009 -0.177297 0.000021 21 4 14 59318 0.08774 .00009 0.42249 .00009 -0.177635 0.000022 21 4 15 59319 0.08887 .00009 0.42329 .00009 -0.177885 0.000020 _______________________________________________________________________ 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 = 0.1230 - 0.0577 cos A + 0.0958 sin A + 0.0198 cos C - 0.0272 sin C y = 0.3598 + 0.0873 cos A + 0.0549 sin A - 0.0272 cos C - 0.0198 sin C UT1-UTC = -0.1466 + 0.00025 (MJD - 59327) - (UT2-UT1) where A = 2*pi*(MJD-59319)/365.25 and C = 2*pi*(MJD-59319)/435. TAI-UTC(MJD 59320) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59319)**0.80 S t = 0.00025 (MJD-59319)**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 16 59320 0.0901 0.4242 -0.17803 2021 4 17 59321 0.0912 0.4253 -0.17804 2021 4 18 59322 0.0922 0.4264 -0.17796 2021 4 19 59323 0.0932 0.4274 -0.17784 2021 4 20 59324 0.0941 0.4283 -0.17774 2021 4 21 59325 0.0952 0.4291 -0.17774 2021 4 22 59326 0.0963 0.4298 -0.17791 2021 4 23 59327 0.0976 0.4305 -0.17833 2021 4 24 59328 0.0989 0.4312 -0.17902 2021 4 25 59329 0.1001 0.4318 -0.17994 2021 4 26 59330 0.1014 0.4325 -0.18098 2021 4 27 59331 0.1028 0.4331 -0.18196 2021 4 28 59332 0.1041 0.4337 -0.18271 2021 4 29 59333 0.1056 0.4342 -0.18316 2021 4 30 59334 0.1071 0.4347 -0.18329 2021 5 1 59335 0.1086 0.4351 -0.18319 2021 5 2 59336 0.1102 0.4356 -0.18299 2021 5 3 59337 0.1118 0.4361 -0.18276 2021 5 4 59338 0.1133 0.4365 -0.18259 2021 5 5 59339 0.1148 0.4370 -0.18250 2021 5 6 59340 0.1162 0.4373 -0.18250 2021 5 7 59341 0.1177 0.4377 -0.18256 2021 5 8 59342 0.1192 0.4380 -0.18265 2021 5 9 59343 0.1208 0.4382 -0.18272 2021 5 10 59344 0.1223 0.4385 -0.18271 2021 5 11 59345 0.1239 0.4387 -0.18256 2021 5 12 59346 0.1254 0.4390 -0.18225 2021 5 13 59347 0.1270 0.4392 -0.18176 2021 5 14 59348 0.1285 0.4394 -0.18111 2021 5 15 59349 0.1301 0.4396 -0.18032 2021 5 16 59350 0.1317 0.4397 -0.17946 2021 5 17 59351 0.1332 0.4398 -0.17859 2021 5 18 59352 0.1348 0.4399 -0.17779 2021 5 19 59353 0.1364 0.4400 -0.17712 2021 5 20 59354 0.1379 0.4401 -0.17665 2021 5 21 59355 0.1395 0.4401 -0.17642 2021 5 22 59356 0.1411 0.4401 -0.17641 2021 5 23 59357 0.1426 0.4401 -0.17655 2021 5 24 59358 0.1442 0.4400 -0.17672 2021 5 25 59359 0.1458 0.4400 -0.17678 2021 5 26 59360 0.1474 0.4399 -0.17661 2021 5 27 59361 0.1490 0.4398 -0.17618 2021 5 28 59362 0.1506 0.4396 -0.17551 2021 5 29 59363 0.1521 0.4395 -0.17469 2021 5 30 59364 0.1537 0.4393 -0.17386 2021 5 31 59365 0.1553 0.4391 -0.17310 2021 6 1 59366 0.1569 0.4388 -0.17246 2021 6 2 59367 0.1585 0.4386 -0.17195 2021 6 3 59368 0.1601 0.4383 -0.17155 2021 6 4 59369 0.1616 0.4380 -0.17119 2021 6 5 59370 0.1632 0.4376 -0.17083 2021 6 6 59371 0.1648 0.4373 -0.17040 2021 6 7 59372 0.1664 0.4369 -0.16986 2021 6 8 59373 0.1679 0.4364 -0.16917 2021 6 9 59374 0.1695 0.4360 -0.16831 2021 6 10 59375 0.1710 0.4355 -0.16727 2021 6 11 59376 0.1726 0.4350 -0.16608 2021 6 12 59377 0.1741 0.4345 -0.16480 2021 6 13 59378 0.1757 0.4340 -0.16349 2021 6 14 59379 0.1772 0.4334 -0.16223 2021 6 15 59380 0.1787 0.4328 -0.16108 2021 6 16 59381 0.1802 0.4322 -0.16010 2021 6 17 59382 0.1817 0.4316 -0.15933 2021 6 18 59383 0.1832 0.4309 -0.15878 2021 6 19 59384 0.1847 0.4302 -0.15839 2021 6 20 59385 0.1862 0.4295 -0.15808 2021 6 21 59386 0.1877 0.4288 -0.15773 2021 6 22 59387 0.1891 0.4280 -0.15721 2021 6 23 59388 0.1905 0.4272 -0.15644 2021 6 24 59389 0.1920 0.4264 -0.15542 2021 6 25 59390 0.1934 0.4256 -0.15421 2021 6 26 59391 0.1948 0.4247 -0.15292 2021 6 27 59392 0.1962 0.4239 -0.15168 2021 6 28 59393 0.1975 0.4230 -0.15055 2021 6 29 59394 0.1989 0.4220 -0.14958 2021 6 30 59395 0.2002 0.4211 -0.14873 2021 7 1 59396 0.2015 0.4201 -0.14796 2021 7 2 59397 0.2029 0.4191 -0.14720 2021 7 3 59398 0.2041 0.4181 -0.14640 2021 7 4 59399 0.2054 0.4171 -0.14552 2021 7 5 59400 0.2067 0.4161 -0.14449 2021 7 6 59401 0.2079 0.4150 -0.14332 2021 7 7 59402 0.2091 0.4139 -0.14198 2021 7 8 59403 0.2103 0.4128 -0.14051 2021 7 9 59404 0.2115 0.4117 -0.13894 2021 7 10 59405 0.2127 0.4105 -0.13734 2021 7 11 59406 0.2138 0.4094 -0.13578 2021 7 12 59407 0.2149 0.4082 -0.13433 2021 7 13 59408 0.2161 0.4070 -0.13307 2021 7 14 59409 0.2171 0.4058 -0.13202 2021 7 15 59410 0.2182 0.4045 -0.13118 2021 7 16 59411 0.2192 0.4033 -0.13052 2021 7 17 59412 0.2202 0.4020 -0.12995 2021 7 18 59413 0.2212 0.4007 -0.12938 2021 7 19 59414 0.2222 0.3994 -0.12868 2021 7 20 59415 0.2232 0.3981 -0.12778 2021 7 21 59416 0.2241 0.3968 -0.12666 2021 7 22 59417 0.2250 0.3954 -0.12535 2021 7 23 59418 0.2259 0.3940 -0.12395 2021 7 24 59419 0.2267 0.3926 -0.12258 2021 7 25 59420 0.2275 0.3913 -0.12133 2021 7 26 59421 0.2283 0.3898 -0.12025 2021 7 27 59422 0.2291 0.3884 -0.11933 2021 7 28 59423 0.2299 0.3870 -0.11854 2021 7 29 59424 0.2306 0.3855 -0.11779 2021 7 30 59425 0.2313 0.3841 -0.11702 2021 7 31 59426 0.2320 0.3826 -0.11617 2021 8 1 59427 0.2326 0.3811 -0.11519 2021 8 2 59428 0.2332 0.3796 -0.11406 2021 8 3 59429 0.2338 0.3781 -0.11277 2021 8 4 59430 0.2344 0.3766 -0.11135 2021 8 5 59431 0.2349 0.3750 -0.10983 2021 8 6 59432 0.2354 0.3735 -0.10828 2021 8 7 59433 0.2359 0.3720 -0.10676 2021 8 8 59434 0.2364 0.3704 -0.10535 2021 8 9 59435 0.2368 0.3688 -0.10412 2021 8 10 59436 0.2372 0.3673 -0.10313 2021 8 11 59437 0.2375 0.3657 -0.10238 2021 8 12 59438 0.2379 0.3641 -0.10183 2021 8 13 59439 0.2382 0.3625 -0.10140 2021 8 14 59440 0.2385 0.3609 -0.10097 2021 8 15 59441 0.2387 0.3593 -0.10043 2021 8 16 59442 0.2389 0.3577 -0.09972 2021 8 17 59443 0.2391 0.3561 -0.09879 2021 8 18 59444 0.2393 0.3545 -0.09768 2021 8 19 59445 0.2394 0.3528 -0.09646 2021 8 20 59446 0.2395 0.3512 -0.09525 2021 8 21 59447 0.2396 0.3496 -0.09415 2021 8 22 59448 0.2396 0.3479 -0.09322 2021 8 23 59449 0.2396 0.3463 -0.09249 2021 8 24 59450 0.2396 0.3447 -0.09193 2021 8 25 59451 0.2395 0.3430 -0.09147 2021 8 26 59452 0.2395 0.3414 -0.09104 2021 8 27 59453 0.2393 0.3398 -0.09055 2021 8 28 59454 0.2392 0.3381 -0.08997 2021 8 29 59455 0.2390 0.3365 -0.08924 2021 8 30 59456 0.2388 0.3349 -0.08838 2021 8 31 59457 0.2386 0.3332 -0.08737 2021 9 1 59458 0.2383 0.3316 -0.08627 2021 9 2 59459 0.2380 0.3300 -0.08512 2021 9 3 59460 0.2377 0.3284 -0.08399 2021 9 4 59461 0.2373 0.3267 -0.08295 2021 9 5 59462 0.2369 0.3251 -0.08210 2021 9 6 59463 0.2365 0.3235 -0.08148 2021 9 7 59464 0.2361 0.3219 -0.08114 2021 9 8 59465 0.2356 0.3203 -0.08104 2021 9 9 59466 0.2351 0.3187 -0.08110 2021 9 10 59467 0.2345 0.3171 -0.08120 2021 9 11 59468 0.2339 0.3156 -0.08121 2021 9 12 59469 0.2333 0.3140 -0.08104 2021 9 13 59470 0.2327 0.3124 -0.08064 2021 9 14 59471 0.2321 0.3109 -0.08003 2021 9 15 59472 0.2314 0.3093 -0.07930 2021 9 16 59473 0.2306 0.3078 -0.07855 2021 9 17 59474 0.2299 0.3063 -0.07787 2021 9 18 59475 0.2291 0.3047 -0.07736 2021 9 19 59476 0.2283 0.3032 -0.07705 2021 9 20 59477 0.2275 0.3017 -0.07692 2021 9 21 59478 0.2266 0.3003 -0.07693 2021 9 22 59479 0.2257 0.2988 -0.07700 2021 9 23 59480 0.2248 0.2973 -0.07705 2021 9 24 59481 0.2238 0.2959 -0.07701 2021 9 25 59482 0.2229 0.2945 -0.07685 2021 9 26 59483 0.2218 0.2930 -0.07653 2021 9 27 59484 0.2208 0.2916 -0.07607 2021 9 28 59485 0.2198 0.2902 -0.07549 2021 9 29 59486 0.2187 0.2889 -0.07484 2021 9 30 59487 0.2176 0.2875 -0.07419 2021 10 1 59488 0.2164 0.2862 -0.07361 2021 10 2 59489 0.2152 0.2848 -0.07317 2021 10 3 59490 0.2141 0.2835 -0.07295 2021 10 4 59491 0.2128 0.2822 -0.07300 2021 10 5 59492 0.2116 0.2810 -0.07332 2021 10 6 59493 0.2103 0.2797 -0.07386 2021 10 7 59494 0.2090 0.2785 -0.07450 2021 10 8 59495 0.2077 0.2773 -0.07510 2021 10 9 59496 0.2064 0.2761 -0.07552 2021 10 10 59497 0.2050 0.2749 -0.07569 2021 10 11 59498 0.2036 0.2737 -0.07561 2021 10 12 59499 0.2022 0.2726 -0.07534 2021 10 13 59500 0.2008 0.2715 -0.07501 2021 10 14 59501 0.1993 0.2704 -0.07472 2021 10 15 59502 0.1979 0.2693 -0.07457 2021 10 16 59503 0.1964 0.2682 -0.07459 2021 10 17 59504 0.1948 0.2672 -0.07480 2021 10 18 59505 0.1933 0.2662 -0.07515 2021 10 19 59506 0.1917 0.2652 -0.07560 2021 10 20 59507 0.1902 0.2642 -0.07605 2021 10 21 59508 0.1886 0.2633 -0.07646 2021 10 22 59509 0.1869 0.2624 -0.07676 2021 10 23 59510 0.1853 0.2615 -0.07692 2021 10 24 59511 0.1837 0.2606 -0.07693 2021 10 25 59512 0.1820 0.2598 -0.07680 2021 10 26 59513 0.1803 0.2589 -0.07656 2021 10 27 59514 0.1786 0.2581 -0.07627 2021 10 28 59515 0.1769 0.2574 -0.07599 2021 10 29 59516 0.1751 0.2566 -0.07580 2021 10 30 59517 0.1734 0.2559 -0.07576 2021 10 31 59518 0.1716 0.2552 -0.07594 2021 11 1 59519 0.1698 0.2545 -0.07636 2021 11 2 59520 0.1680 0.2539 -0.07699 2021 11 3 59521 0.1662 0.2533 -0.07776 2021 11 4 59522 0.1644 0.2527 -0.07851 2021 11 5 59523 0.1626 0.2521 -0.07910 2021 11 6 59524 0.1607 0.2516 -0.07941 2021 11 7 59525 0.1589 0.2511 -0.07940 2021 11 8 59526 0.1570 0.2506 -0.07911 2021 11 9 59527 0.1551 0.2502 -0.07868 2021 11 10 59528 0.1532 0.2497 -0.07822 2021 11 11 59529 0.1513 0.2494 -0.07785 2021 11 12 59530 0.1494 0.2490 -0.07762 2021 11 13 59531 0.1475 0.2487 -0.07754 2021 11 14 59532 0.1456 0.2483 -0.07757 2021 11 15 59533 0.1436 0.2481 -0.07767 2021 11 16 59534 0.1417 0.2478 -0.07781 2021 11 17 59535 0.1397 0.2476 -0.07792 2021 11 18 59536 0.1378 0.2474 -0.07800 2021 11 19 59537 0.1358 0.2472 -0.07801 2021 11 20 59538 0.1339 0.2471 -0.07790 2021 11 21 59539 0.1319 0.2470 -0.07762 2021 11 22 59540 0.1299 0.2469 -0.07718 2021 11 23 59541 0.1280 0.2469 -0.07663 2021 11 24 59542 0.1260 0.2469 -0.07604 2021 11 25 59543 0.1240 0.2469 -0.07551 2021 11 26 59544 0.1220 0.2469 -0.07511 2021 11 27 59545 0.1200 0.2470 -0.07489 2021 11 28 59546 0.1181 0.2471 -0.07494 2021 11 29 59547 0.1161 0.2473 -0.07525 2021 11 30 59548 0.1141 0.2474 -0.07578 2021 12 1 59549 0.1121 0.2476 -0.07638 2021 12 2 59550 0.1101 0.2478 -0.07689 2021 12 3 59551 0.1082 0.2481 -0.07722 2021 12 4 59552 0.1062 0.2484 -0.07727 2021 12 5 59553 0.1042 0.2487 -0.07695 2021 12 6 59554 0.1023 0.2490 -0.07644 2021 12 7 59555 0.1003 0.2494 -0.07587 2021 12 8 59556 0.0984 0.2498 -0.07535 2021 12 9 59557 0.0964 0.2502 -0.07492 2021 12 10 59558 0.0945 0.2507 -0.07466 2021 12 11 59559 0.0925 0.2512 -0.07454 2021 12 12 59560 0.0906 0.2517 -0.07444 2021 12 13 59561 0.0887 0.2523 -0.07434 2021 12 14 59562 0.0868 0.2528 -0.07419 2021 12 15 59563 0.0849 0.2535 -0.07388 2021 12 16 59564 0.0830 0.2541 -0.07342 2021 12 17 59565 0.0811 0.2548 -0.07287 2021 12 18 59566 0.0792 0.2554 -0.07224 2021 12 19 59567 0.0774 0.2562 -0.07151 2021 12 20 59568 0.0755 0.2569 -0.07077 2021 12 21 59569 0.0737 0.2577 -0.07006 2021 12 22 59570 0.0718 0.2585 -0.06939 2021 12 23 59571 0.0700 0.2593 -0.06883 2021 12 24 59572 0.0682 0.2602 -0.06843 2021 12 25 59573 0.0665 0.2611 -0.06818 2021 12 26 59574 0.0647 0.2620 -0.06809 2021 12 27 59575 0.0629 0.2630 -0.06827 2021 12 28 59576 0.0612 0.2639 -0.06860 2021 12 29 59577 0.0595 0.2649 -0.06893 2021 12 30 59578 0.0578 0.2659 -0.06919 2021 12 31 59579 0.0561 0.2670 -0.06936 2022 1 1 59580 0.0544 0.2681 -0.06934 2022 1 2 59581 0.0528 0.2692 -0.06912 2022 1 3 59582 0.0511 0.2703 -0.06886 2022 1 4 59583 0.0495 0.2714 -0.06869 2022 1 5 59584 0.0479 0.2726 -0.06873 2022 1 6 59585 0.0463 0.2738 -0.06901 2022 1 7 59586 0.0448 0.2750 -0.06944 2022 1 8 59587 0.0433 0.2763 -0.06998 2022 1 9 59588 0.0417 0.2775 -0.07053 2022 1 10 59589 0.0403 0.2788 -0.07099 2022 1 11 59590 0.0388 0.2802 -0.07136 2022 1 12 59591 0.0373 0.2815 -0.07154 2022 1 13 59592 0.0359 0.2829 -0.07148 2022 1 14 59593 0.0345 0.2842 -0.07123 2022 1 15 59594 0.0332 0.2856 -0.07073 2022 1 16 59595 0.0318 0.2871 -0.07007 2022 1 17 59596 0.0305 0.2885 -0.06931 2022 1 18 59597 0.0292 0.2900 -0.06853 2022 1 19 59598 0.0279 0.2915 -0.06785 2022 1 20 59599 0.0267 0.2930 -0.06739 2022 1 21 59600 0.0254 0.2945 -0.06715 2022 1 22 59601 0.0242 0.2960 -0.06712 2022 1 23 59602 0.0231 0.2976 -0.06731 2022 1 24 59603 0.0219 0.2992 -0.06762 2022 1 25 59604 0.0208 0.3008 -0.06792 2022 1 26 59605 0.0197 0.3024 -0.06810 2022 1 27 59606 0.0187 0.3040 -0.06815 2022 1 28 59607 0.0177 0.3057 -0.06797 2022 1 29 59608 0.0167 0.3073 -0.06755 2022 1 30 59609 0.0157 0.3090 -0.06697 2022 1 31 59610 0.0148 0.3107 -0.06634 2022 2 1 59611 0.0138 0.3124 -0.06584 2022 2 2 59612 0.0130 0.3141 -0.06554 2022 2 3 59613 0.0121 0.3158 -0.06551 2022 2 4 59614 0.0113 0.3176 -0.06574 2022 2 5 59615 0.0105 0.3194 -0.06603 2022 2 6 59616 0.0098 0.3211 -0.06635 2022 2 7 59617 0.0090 0.3229 -0.06660 2022 2 8 59618 0.0083 0.3247 -0.06670 2022 2 9 59619 0.0077 0.3265 -0.06660 2022 2 10 59620 0.0071 0.3283 -0.06634 2022 2 11 59621 0.0065 0.3302 -0.06596 2022 2 12 59622 0.0059 0.3320 -0.06550 2022 2 13 59623 0.0054 0.3338 -0.06499 2022 2 14 59624 0.0049 0.3357 -0.06451 2022 2 15 59625 0.0044 0.3376 -0.06421 2022 2 16 59626 0.0040 0.3394 -0.06408 2022 2 17 59627 0.0036 0.3413 -0.06413 2022 2 18 59628 0.0032 0.3432 -0.06440 2022 2 19 59629 0.0029 0.3451 -0.06485 2022 2 20 59630 0.0026 0.3470 -0.06540 2022 2 21 59631 0.0023 0.3489 -0.06597 2022 2 22 59632 0.0021 0.3508 -0.06650 2022 2 23 59633 0.0019 0.3527 -0.06689 2022 2 24 59634 0.0017 0.3546 -0.06709 2022 2 25 59635 0.0016 0.3565 -0.06708 2022 2 26 59636 0.0015 0.3584 -0.06705 2022 2 27 59637 0.0015 0.3603 -0.06696 2022 2 28 59638 0.0014 0.3622 -0.06696 2022 3 1 59639 0.0014 0.3642 -0.06718 2022 3 2 59640 0.0015 0.3661 -0.06758 2022 3 3 59641 0.0016 0.3680 -0.06811 2022 3 4 59642 0.0017 0.3699 -0.06874 2022 3 5 59643 0.0018 0.3718 -0.06947 2022 3 6 59644 0.0020 0.3738 -0.07027 2022 3 7 59645 0.0022 0.3757 -0.07097 2022 3 8 59646 0.0025 0.3776 -0.07161 2022 3 9 59647 0.0028 0.3795 -0.07208 2022 3 10 59648 0.0031 0.3814 -0.07239 2022 3 11 59649 0.0034 0.3833 -0.07257 2022 3 12 59650 0.0038 0.3852 -0.07264 2022 3 13 59651 0.0043 0.3871 -0.07273 2022 3 14 59652 0.0047 0.3889 -0.07294 2022 3 15 59653 0.0052 0.3908 -0.07331 2022 3 16 59654 0.0057 0.3927 -0.07388 2022 3 17 59655 0.0063 0.3945 -0.07469 2022 3 18 59656 0.0069 0.3964 -0.07572 2022 3 19 59657 0.0075 0.3982 -0.07698 2022 3 20 59658 0.0082 0.4001 -0.07832 2022 3 21 59659 0.0088 0.4019 -0.07968 2022 3 22 59660 0.0096 0.4037 -0.08085 2022 3 23 59661 0.0103 0.4055 -0.08176 2022 3 24 59662 0.0111 0.4073 -0.08247 2022 3 25 59663 0.0119 0.4091 -0.08302 2022 3 26 59664 0.0128 0.4109 -0.08353 2022 3 27 59665 0.0137 0.4126 -0.08409 2022 3 28 59666 0.0146 0.4144 -0.08478 2022 3 29 59667 0.0155 0.4161 -0.08573 2022 3 30 59668 0.0165 0.4178 -0.08681 2022 3 31 59669 0.0175 0.4195 -0.08801 2022 4 1 59670 0.0186 0.4212 -0.08927 2022 4 2 59671 0.0197 0.4229 -0.09049 2022 4 3 59672 0.0208 0.4245 -0.09166 2022 4 4 59673 0.0219 0.4262 -0.09267 2022 4 5 59674 0.0230 0.4278 -0.09345 2022 4 6 59675 0.0242 0.4294 -0.09403 2022 4 7 59676 0.0255 0.4310 -0.09446 2022 4 8 59677 0.0267 0.4325 -0.09467 2022 4 9 59678 0.0280 0.4341 -0.09483 2022 4 10 59679 0.0293 0.4356 -0.09499 2022 4 11 59680 0.0306 0.4371 -0.09520 2022 4 12 59681 0.0320 0.4386 -0.09556 2022 4 13 59682 0.0334 0.4401 -0.09619 2022 4 14 59683 0.0348 0.4415 -0.09705 2022 4 15 59684 0.0362 0.4430 -0.09809 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) 59298 -106.27 0.59 -8.93 0.08 59299 -106.20 0.59 -9.17 0.08 59300 -105.87 0.59 -9.22 0.08 59301 -105.42 0.78 -9.00 0.03 59302 -105.30 0.78 -8.71 0.03 59303 -105.73 0.87 -8.64 0.03 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 59298 0.237 0.233 0.068 0.085 59299 0.255 0.233 0.055 0.085 59300 0.274 0.233 0.039 0.085 59301 0.294 0.311 0.021 0.025 59302 0.315 0.311 0.003 0.025 59303 0.336 0.346 -0.016 0.033 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).