********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 21 April 2016 Vol. XXIX No. 016 ______________________________________________________________________ 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 = -0.1 seconds beginning 24 Mar 2016 at 0000 UTC = -0.2 seconds beginning 19 May 2016 at 0000 UTC Beginning 1 July 2015: TAI-UTC = 36.000 000 seconds *********************************************************************** * * * Please note that daily and Bulletin A EOP data can be obtained from * * the primary Earth Orientation (EO) servers at: * * http://maia.usno.navy.mil ftp://maia.usno.navy.mil * * and from the backup EO server at: * * http://toshi.nofs.navy.mil ftp://toshi.nofs.navy.mil * * * * An additional backup mirror of the daily and Bulletin A EOP data * * is now hosted by NASA's Archive of Space Geodesy Data server at: * * ftp://cddis.gsfc.nasa.gov/pub/products/iers * * Daily EOP data will be uploaded here at 18:00 UTC, and * * Bulletin A EOP data should by available by 20:00 UTC. * * * * 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 16 4 15 57493 0.01053 .00009 0.44750 .00009 -0.110328 0.000013 16 4 16 57494 0.01202 .00009 0.44963 .00009 -0.111912 0.000014 16 4 17 57495 0.01369 .00009 0.45188 .00009 -0.113537 0.000015 16 4 18 57496 0.01545 .00009 0.45401 .00009 -0.115169 0.000009 16 4 19 57497 0.01708 .00009 0.45571 .00009 -0.116920 0.000008 16 4 20 57498 0.01864 .00009 0.45680 .00009 -0.118664 0.000008 16 4 21 57499 0.02032 .00009 0.45765 .00009 -0.120381 0.000006 _______________________________________________________________________ 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 = 0.1145 - 0.1145 cos A + 0.0677 sin A + 0.0206 cos C + 0.0296 sin C y = 0.3644 + 0.0619 cos A + 0.1054 sin A + 0.0296 cos C - 0.0206 sin C UT1-UTC = -0.0993 - 0.00144 (MJD - 57507) - (UT2-UT1) where A = 2*pi*(MJD-57499)/365.25 and C = 2*pi*(MJD-57499)/435. TAI-UTC(MJD 57500) = 36.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-57499)**0.80 S t = 0.00025 (MJD-57499)**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) 2016 4 22 57500 0.0221 0.4585 -0.12209 2016 4 23 57501 0.0239 0.4595 -0.12374 2016 4 24 57502 0.0257 0.4606 -0.12527 2016 4 25 57503 0.0275 0.4618 -0.12665 2016 4 26 57504 0.0293 0.4631 -0.12791 2016 4 27 57505 0.0310 0.4643 -0.12910 2016 4 28 57506 0.0328 0.4655 -0.13027 2016 4 29 57507 0.0347 0.4665 -0.13148 2016 4 30 57508 0.0365 0.4676 -0.13278 2016 5 1 57509 0.0385 0.4685 -0.13426 2016 5 2 57510 0.0404 0.4695 -0.13595 2016 5 3 57511 0.0423 0.4704 -0.13785 2016 5 4 57512 0.0442 0.4713 -0.13989 2016 5 5 57513 0.0462 0.4723 -0.14195 2016 5 6 57514 0.0481 0.4732 -0.14394 2016 5 7 57515 0.0501 0.4741 -0.14578 2016 5 8 57516 0.0520 0.4750 -0.14745 2016 5 9 57517 0.0540 0.4757 -0.14895 2016 5 10 57518 0.0560 0.4765 -0.15034 2016 5 11 57519 0.0580 0.4772 -0.15163 2016 5 12 57520 0.0601 0.4779 -0.15290 2016 5 13 57521 0.0621 0.4785 -0.15420 2016 5 14 57522 0.0641 0.4792 -0.15553 2016 5 15 57523 0.0662 0.4798 -0.15692 2016 5 16 57524 0.0683 0.4804 -0.15834 2016 5 17 57525 0.0703 0.4809 -0.15977 2016 5 18 57526 0.0724 0.4814 -0.16118 2016 5 19 57527 0.0745 0.4819 -0.16255 2016 5 20 57528 0.0766 0.4823 -0.16385 2016 5 21 57529 0.0787 0.4828 -0.16507 2016 5 22 57530 0.0809 0.4831 -0.16621 2016 5 23 57531 0.0830 0.4835 -0.16727 2016 5 24 57532 0.0851 0.4838 -0.16827 2016 5 25 57533 0.0873 0.4841 -0.16924 2016 5 26 57534 0.0894 0.4843 -0.17024 2016 5 27 57535 0.0916 0.4846 -0.17133 2016 5 28 57536 0.0937 0.4848 -0.17253 2016 5 29 57537 0.0959 0.4849 -0.17386 2016 5 30 57538 0.0981 0.4850 -0.17534 2016 5 31 57539 0.1002 0.4851 -0.17693 2016 6 1 57540 0.1024 0.4852 -0.17859 2016 6 2 57541 0.1046 0.4852 -0.18021 2016 6 3 57542 0.1067 0.4852 -0.18174 2016 6 4 57543 0.1089 0.4852 -0.18310 2016 6 5 57544 0.1111 0.4851 -0.18428 2016 6 6 57545 0.1132 0.4850 -0.18532 2016 6 7 57546 0.1154 0.4849 -0.18626 2016 6 8 57547 0.1176 0.4847 -0.18716 2016 6 9 57548 0.1197 0.4845 -0.18807 2016 6 10 57549 0.1219 0.4842 -0.18900 2016 6 11 57550 0.1240 0.4840 -0.18995 2016 6 12 57551 0.1262 0.4837 -0.19091 2016 6 13 57552 0.1283 0.4833 -0.19186 2016 6 14 57553 0.1305 0.4830 -0.19277 2016 6 15 57554 0.1326 0.4826 -0.19364 2016 6 16 57555 0.1347 0.4821 -0.19444 2016 6 17 57556 0.1368 0.4817 -0.19517 2016 6 18 57557 0.1389 0.4812 -0.19582 2016 6 19 57558 0.1410 0.4806 -0.19639 2016 6 20 57559 0.1431 0.4801 -0.19692 2016 6 21 57560 0.1452 0.4795 -0.19742 2016 6 22 57561 0.1472 0.4789 -0.19795 2016 6 23 57562 0.1493 0.4782 -0.19855 2016 6 24 57563 0.1513 0.4775 -0.19928 2016 6 25 57564 0.1534 0.4768 -0.20015 2016 6 26 57565 0.1554 0.4761 -0.20117 2016 6 27 57566 0.1574 0.4753 -0.20232 2016 6 28 57567 0.1594 0.4745 -0.20354 2016 6 29 57568 0.1614 0.4736 -0.20478 2016 6 30 57569 0.1633 0.4728 -0.20595 2016 7 1 57570 0.1653 0.4719 -0.20701 2016 7 2 57571 0.1672 0.4709 -0.20793 2016 7 3 57572 0.1691 0.4700 -0.20871 2016 7 4 57573 0.1710 0.4690 -0.20941 2016 7 5 57574 0.1729 0.4680 -0.21006 2016 7 6 57575 0.1747 0.4669 -0.21072 2016 7 7 57576 0.1766 0.4659 -0.21142 2016 7 8 57577 0.1784 0.4648 -0.21216 2016 7 9 57578 0.1802 0.4636 -0.21294 2016 7 10 57579 0.1820 0.4625 -0.21373 2016 7 11 57580 0.1837 0.4613 -0.21451 2016 7 12 57581 0.1855 0.4601 -0.21526 2016 7 13 57582 0.1872 0.4588 -0.21594 2016 7 14 57583 0.1889 0.4576 -0.21655 2016 7 15 57584 0.1905 0.4563 -0.21707 2016 7 16 57585 0.1922 0.4550 -0.21751 2016 7 17 57586 0.1938 0.4536 -0.21789 2016 7 18 57587 0.1954 0.4523 -0.21823 2016 7 19 57588 0.1970 0.4509 -0.21858 2016 7 20 57589 0.1985 0.4495 -0.21898 2016 7 21 57590 0.2000 0.4480 -0.21949 2016 7 22 57591 0.2015 0.4466 -0.22015 2016 7 23 57592 0.2030 0.4451 -0.22095 2016 7 24 57593 0.2045 0.4436 -0.22188 2016 7 25 57594 0.2059 0.4421 -0.22288 2016 7 26 57595 0.2073 0.4405 -0.22390 2016 7 27 57596 0.2086 0.4390 -0.22486 2016 7 28 57597 0.2100 0.4374 -0.22572 2016 7 29 57598 0.2113 0.4358 -0.22645 2016 7 30 57599 0.2125 0.4341 -0.22706 2016 7 31 57600 0.2138 0.4325 -0.22759 2016 8 1 57601 0.2150 0.4308 -0.22809 2016 8 2 57602 0.2162 0.4291 -0.22860 2016 8 3 57603 0.2173 0.4274 -0.22917 2016 8 4 57604 0.2185 0.4257 -0.22981 2016 8 5 57605 0.2195 0.4240 -0.23051 2016 8 6 57606 0.2206 0.4222 -0.23126 2016 8 7 57607 0.2216 0.4204 -0.23201 2016 8 8 57608 0.2226 0.4186 -0.23276 2016 8 9 57609 0.2236 0.4168 -0.23346 2016 8 10 57610 0.2245 0.4150 -0.23412 2016 8 11 57611 0.2254 0.4132 -0.23470 2016 8 12 57612 0.2263 0.4113 -0.23523 2016 8 13 57613 0.2271 0.4095 -0.23571 2016 8 14 57614 0.2279 0.4076 -0.23616 2016 8 15 57615 0.2287 0.4057 -0.23664 2016 8 16 57616 0.2294 0.4038 -0.23719 2016 8 17 57617 0.2301 0.4019 -0.23785 2016 8 18 57618 0.2308 0.4000 -0.23867 2016 8 19 57619 0.2314 0.3981 -0.23967 2016 8 20 57620 0.2320 0.3961 -0.24085 2016 8 21 57621 0.2326 0.3942 -0.24214 2016 8 22 57622 0.2331 0.3922 -0.24349 2016 8 23 57623 0.2336 0.3903 -0.24481 2016 8 24 57624 0.2340 0.3883 -0.24603 2016 8 25 57625 0.2344 0.3863 -0.24712 2016 8 26 57626 0.2348 0.3843 -0.24810 2016 8 27 57627 0.2352 0.3824 -0.24898 2016 8 28 57628 0.2355 0.3804 -0.24982 2016 8 29 57629 0.2357 0.3784 -0.25068 2016 8 30 57630 0.2360 0.3764 -0.25159 2016 8 31 57631 0.2362 0.3744 -0.25259 2016 9 1 57632 0.2363 0.3723 -0.25367 2016 9 2 57633 0.2365 0.3703 -0.25482 2016 9 3 57634 0.2366 0.3683 -0.25601 2016 9 4 57635 0.2366 0.3663 -0.25721 2016 9 5 57636 0.2366 0.3643 -0.25838 2016 9 6 57637 0.2366 0.3623 -0.25951 2016 9 7 57638 0.2366 0.3603 -0.26058 2016 9 8 57639 0.2365 0.3582 -0.26159 2016 9 9 57640 0.2363 0.3562 -0.26254 2016 9 10 57641 0.2362 0.3542 -0.26347 2016 9 11 57642 0.2360 0.3522 -0.26441 2016 9 12 57643 0.2357 0.3502 -0.26540 2016 9 13 57644 0.2355 0.3482 -0.26650 2016 9 14 57645 0.2352 0.3462 -0.26775 2016 9 15 57646 0.2348 0.3442 -0.26918 2016 9 16 57647 0.2344 0.3422 -0.27083 2016 9 17 57648 0.2340 0.3402 -0.27264 2016 9 18 57649 0.2336 0.3383 -0.27455 2016 9 19 57650 0.2331 0.3363 -0.27647 2016 9 20 57651 0.2326 0.3343 -0.27831 2016 9 21 57652 0.2320 0.3324 -0.28001 2016 9 22 57653 0.2314 0.3304 -0.28157 2016 9 23 57654 0.2308 0.3285 -0.28301 2016 9 24 57655 0.2301 0.3266 -0.28437 2016 9 25 57656 0.2294 0.3246 -0.28572 2016 9 26 57657 0.2287 0.3227 -0.28711 2016 9 27 57658 0.2279 0.3208 -0.28856 2016 9 28 57659 0.2271 0.3190 -0.29009 2016 9 29 57660 0.2263 0.3171 -0.29170 2016 9 30 57661 0.2254 0.3152 -0.29335 2016 10 1 57662 0.2245 0.3134 -0.29501 2016 10 2 57663 0.2236 0.3116 -0.29666 2016 10 3 57664 0.2226 0.3097 -0.29826 2016 10 4 57665 0.2216 0.3079 -0.29981 2016 10 5 57666 0.2206 0.3061 -0.30128 2016 10 6 57667 0.2195 0.3044 -0.30269 2016 10 7 57668 0.2184 0.3026 -0.30405 2016 10 8 57669 0.2173 0.3009 -0.30539 2016 10 9 57670 0.2161 0.2992 -0.30677 2016 10 10 57671 0.2150 0.2975 -0.30821 2016 10 11 57672 0.2137 0.2958 -0.30978 2016 10 12 57673 0.2125 0.2941 -0.31152 2016 10 13 57674 0.2112 0.2925 -0.31346 2016 10 14 57675 0.2099 0.2908 -0.31559 2016 10 15 57676 0.2086 0.2892 -0.31787 2016 10 16 57677 0.2072 0.2876 -0.32023 2016 10 17 57678 0.2058 0.2861 -0.32255 2016 10 18 57679 0.2044 0.2845 -0.32477 2016 10 19 57680 0.2029 0.2830 -0.32683 2016 10 20 57681 0.2014 0.2815 -0.32874 2016 10 21 57682 0.1999 0.2800 -0.33054 2016 10 22 57683 0.1984 0.2786 -0.33229 2016 10 23 57684 0.1968 0.2771 -0.33405 2016 10 24 57685 0.1953 0.2757 -0.33585 2016 10 25 57686 0.1937 0.2744 -0.33770 2016 10 26 57687 0.1920 0.2730 -0.33959 2016 10 27 57688 0.1904 0.2717 -0.34149 2016 10 28 57689 0.1887 0.2704 -0.34337 2016 10 29 57690 0.1870 0.2691 -0.34518 2016 10 30 57691 0.1853 0.2678 -0.34689 2016 10 31 57692 0.1835 0.2666 -0.34848 2016 11 1 57693 0.1817 0.2654 -0.34995 2016 11 2 57694 0.1799 0.2642 -0.35130 2016 11 3 57695 0.1781 0.2631 -0.35258 2016 11 4 57696 0.1763 0.2619 -0.35381 2016 11 5 57697 0.1745 0.2608 -0.35504 2016 11 6 57698 0.1726 0.2598 -0.35634 2016 11 7 57699 0.1707 0.2587 -0.35773 2016 11 8 57700 0.1688 0.2577 -0.35928 2016 11 9 57701 0.1669 0.2568 -0.36101 2016 11 10 57702 0.1649 0.2558 -0.36293 2016 11 11 57703 0.1630 0.2549 -0.36503 2016 11 12 57704 0.1610 0.2540 -0.36723 2016 11 13 57705 0.1590 0.2532 -0.36947 2016 11 14 57706 0.1570 0.2523 -0.37163 2016 11 15 57707 0.1550 0.2515 -0.37364 2016 11 16 57708 0.1529 0.2508 -0.37549 2016 11 17 57709 0.1509 0.2500 -0.37718 2016 11 18 57710 0.1488 0.2493 -0.37877 2016 11 19 57711 0.1467 0.2487 -0.38032 2016 11 20 57712 0.1447 0.2480 -0.38186 2016 11 21 57713 0.1426 0.2474 -0.38343 2016 11 22 57714 0.1405 0.2468 -0.38502 2016 11 23 57715 0.1383 0.2463 -0.38660 2016 11 24 57716 0.1362 0.2458 -0.38817 2016 11 25 57717 0.1341 0.2453 -0.38970 2016 11 26 57718 0.1319 0.2448 -0.39122 2016 11 27 57719 0.1298 0.2444 -0.39272 2016 11 28 57720 0.1276 0.2441 -0.39417 2016 11 29 57721 0.1255 0.2437 -0.39556 2016 11 30 57722 0.1233 0.2434 -0.39691 2016 12 1 57723 0.1211 0.2431 -0.39820 2016 12 2 57724 0.1190 0.2429 -0.39944 2016 12 3 57725 0.1168 0.2426 -0.40066 2016 12 4 57726 0.1146 0.2425 -0.40197 2016 12 5 57727 0.1124 0.2423 -0.40343 2016 12 6 57728 0.1102 0.2422 -0.40502 2016 12 7 57729 0.1080 0.2421 -0.40678 2016 12 8 57730 0.1058 0.2421 -0.40862 2016 12 9 57731 0.1036 0.2421 -0.41057 2016 12 10 57732 0.1015 0.2421 -0.41253 2016 12 11 57733 0.0993 0.2421 -0.41448 2016 12 12 57734 0.0971 0.2422 -0.41640 2016 12 13 57735 0.0949 0.2423 -0.41818 2016 12 14 57736 0.0927 0.2425 -0.41984 2016 12 15 57737 0.0905 0.2427 -0.42143 2016 12 16 57738 0.0884 0.2429 -0.42293 2016 12 17 57739 0.0862 0.2432 -0.42437 2016 12 18 57740 0.0840 0.2434 -0.42595 2016 12 19 57741 0.0819 0.2438 -0.42762 2016 12 20 57742 0.0797 0.2441 -0.42935 2016 12 21 57743 0.0776 0.2445 -0.43113 2016 12 22 57744 0.0754 0.2449 -0.43290 2016 12 23 57745 0.0733 0.2454 -0.43463 2016 12 24 57746 0.0712 0.2459 -0.43630 2016 12 25 57747 0.0691 0.2464 -0.43792 2016 12 26 57748 0.0670 0.2469 -0.43942 2016 12 27 57749 0.0649 0.2475 -0.44080 2016 12 28 57750 0.0628 0.2481 -0.44208 2016 12 29 57751 0.0607 0.2488 -0.44323 2016 12 30 57752 0.0587 0.2494 -0.44437 2016 12 31 57753 0.0566 0.2501 -0.44558 2017 1 1 57754 0.0546 0.2509 -0.44689 2017 1 2 57755 0.0526 0.2517 -0.44835 2017 1 3 57756 0.0506 0.2525 -0.44994 2017 1 4 57757 0.0486 0.2533 -0.45162 2017 1 5 57758 0.0466 0.2542 -0.45342 2017 1 6 57759 0.0447 0.2550 -0.45531 2017 1 7 57760 0.0427 0.2560 -0.45716 2017 1 8 57761 0.0408 0.2569 -0.45892 2017 1 9 57762 0.0389 0.2579 -0.46054 2017 1 10 57763 0.0370 0.2589 -0.46209 2017 1 11 57764 0.0352 0.2600 -0.46360 2017 1 12 57765 0.0333 0.2610 -0.46509 2017 1 13 57766 0.0315 0.2621 -0.46661 2017 1 14 57767 0.0297 0.2632 -0.46823 2017 1 15 57768 0.0279 0.2644 -0.46986 2017 1 16 57769 0.0261 0.2656 -0.47158 2017 1 17 57770 0.0244 0.2668 -0.47330 2017 1 18 57771 0.0227 0.2680 -0.47502 2017 1 19 57772 0.0210 0.2693 -0.47674 2017 1 20 57773 0.0193 0.2706 -0.47837 2017 1 21 57774 0.0177 0.2719 -0.47989 2017 1 22 57775 0.0161 0.2732 -0.48139 2017 1 23 57776 0.0145 0.2746 -0.48273 2017 1 24 57777 0.0129 0.2759 -0.48399 2017 1 25 57778 0.0113 0.2773 -0.48521 2017 1 26 57779 0.0098 0.2788 -0.48641 2017 1 27 57780 0.0083 0.2802 -0.48764 2017 1 28 57781 0.0069 0.2817 -0.48893 2017 1 29 57782 0.0054 0.2832 -0.49032 2017 1 30 57783 0.0040 0.2847 -0.49182 2017 1 31 57784 0.0026 0.2863 -0.49353 2017 2 1 57785 0.0013 0.2878 -0.49534 2017 2 2 57786 -0.0001 0.2894 -0.49718 2017 2 3 57787 -0.0014 0.2910 -0.49907 2017 2 4 57788 -0.0026 0.2927 -0.50082 2017 2 5 57789 -0.0039 0.2943 -0.50253 2017 2 6 57790 -0.0051 0.2960 -0.50415 2017 2 7 57791 -0.0063 0.2977 -0.50568 2017 2 8 57792 -0.0074 0.2994 -0.50713 2017 2 9 57793 -0.0085 0.3011 -0.50864 2017 2 10 57794 -0.0096 0.3028 -0.51025 2017 2 11 57795 -0.0107 0.3046 -0.51199 2017 2 12 57796 -0.0117 0.3063 -0.51380 2017 2 13 57797 -0.0127 0.3081 -0.51572 2017 2 14 57798 -0.0136 0.3099 -0.51769 2017 2 15 57799 -0.0146 0.3117 -0.51975 2017 2 16 57800 -0.0155 0.3135 -0.52183 2017 2 17 57801 -0.0163 0.3154 -0.52388 2017 2 18 57802 -0.0171 0.3172 -0.52583 2017 2 19 57803 -0.0179 0.3191 -0.52762 2017 2 20 57804 -0.0187 0.3210 -0.52939 2017 2 21 57805 -0.0194 0.3229 -0.53102 2017 2 22 57806 -0.0201 0.3248 -0.53269 2017 2 23 57807 -0.0207 0.3267 -0.53431 2017 2 24 57808 -0.0214 0.3286 -0.53597 2017 2 25 57809 -0.0219 0.3305 -0.53771 2017 2 26 57810 -0.0225 0.3325 -0.53961 2017 2 27 57811 -0.0230 0.3344 -0.54169 2017 2 28 57812 -0.0235 0.3364 -0.54394 2017 3 1 57813 -0.0239 0.3383 -0.54631 2017 3 2 57814 -0.0243 0.3403 -0.54873 2017 3 3 57815 -0.0247 0.3423 -0.55105 2017 3 4 57816 -0.0250 0.3443 -0.55320 2017 3 5 57817 -0.0253 0.3462 -0.55518 2017 3 6 57818 -0.0256 0.3482 -0.55699 2017 3 7 57819 -0.0258 0.3502 -0.55862 2017 3 8 57820 -0.0260 0.3522 -0.56024 2017 3 9 57821 -0.0262 0.3542 -0.56187 2017 3 10 57822 -0.0263 0.3562 -0.56346 2017 3 11 57823 -0.0264 0.3582 -0.56508 2017 3 12 57824 -0.0264 0.3602 -0.56668 2017 3 13 57825 -0.0264 0.3622 -0.56827 2017 3 14 57826 -0.0264 0.3642 -0.56996 2017 3 15 57827 -0.0263 0.3662 -0.57149 2017 3 16 57828 -0.0262 0.3683 -0.57301 2017 3 17 57829 -0.0261 0.3703 -0.57448 2017 3 18 57830 -0.0259 0.3723 -0.57586 2017 3 19 57831 -0.0257 0.3743 -0.57717 2017 3 20 57832 -0.0255 0.3762 -0.57845 2017 3 21 57833 -0.0252 0.3782 -0.57980 2017 3 22 57834 -0.0249 0.3802 -0.58121 2017 3 23 57835 -0.0246 0.3822 -0.58262 2017 3 24 57836 -0.0242 0.3842 -0.58413 2017 3 25 57837 -0.0237 0.3861 -0.58576 2017 3 26 57838 -0.0233 0.3881 -0.58758 2017 3 27 57839 -0.0228 0.3901 -0.58952 2017 3 28 57840 -0.0223 0.3920 -0.59160 2017 3 29 57841 -0.0217 0.3939 -0.59373 2017 3 30 57842 -0.0211 0.3959 -0.59586 2017 3 31 57843 -0.0205 0.3978 -0.59788 2017 4 1 57844 -0.0198 0.3997 -0.59981 2017 4 2 57845 -0.0191 0.4016 -0.60154 2017 4 3 57846 -0.0184 0.4035 -0.60323 2017 4 4 57847 -0.0176 0.4054 -0.60485 2017 4 5 57848 -0.0168 0.4072 -0.60651 2017 4 6 57849 -0.0160 0.4091 -0.60826 2017 4 7 57850 -0.0151 0.4109 -0.61018 2017 4 8 57851 -0.0142 0.4128 -0.61218 2017 4 9 57852 -0.0133 0.4146 -0.61429 2017 4 10 57853 -0.0124 0.4164 -0.61640 2017 4 11 57854 -0.0114 0.4182 -0.61845 2017 4 12 57855 -0.0103 0.4199 -0.62041 2017 4 13 57856 -0.0093 0.4217 -0.62227 2017 4 14 57857 -0.0082 0.4234 -0.62398 2017 4 15 57858 -0.0071 0.4251 -0.62556 2017 4 16 57859 -0.0059 0.4268 -0.62706 2017 4 17 57860 -0.0048 0.4285 -0.62847 2017 4 18 57861 -0.0035 0.4302 -0.62982 2017 4 19 57862 -0.0023 0.4318 -0.63112 2017 4 20 57863 -0.0010 0.4335 -0.63244 2017 4 21 57864 0.0003 0.4351 -0.63382 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) 57470 -92.67 0.14 -12.30 0.07 57471 -92.74 0.14 -12.27 0.07 57472 -92.90 0.14 -12.35 0.07 57473 -93.11 0.30 -12.50 0.23 57474 -93.26 0.30 -12.65 0.15 57475 -93.37 0.14 -12.79 0.07 57476 -93.49 0.14 -12.95 0.07 57477 -93.52 0.14 -13.05 0.07 57478 -93.19 0.14 -12.98 0.07 57479 -92.54 0.14 -12.73 0.07 57480 -92.00 0.14 -12.54 0.07 57481 -91.94 0.30 -12.63 0.01 57482 -92.20 0.30 -12.91 0.01 57483 -92.29 0.30 -13.10 0.01 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 57470 -0.074 0.056 0.007 0.070 57471 -0.089 0.056 0.018 0.070 57472 -0.110 0.056 0.026 0.070 57473 -0.136 0.119 0.021 0.230 57474 -0.146 0.119 0.003 0.150 57475 -0.136 0.056 -0.021 0.070 57476 -0.109 0.056 -0.051 0.070 57477 -0.076 0.056 -0.054 0.070 57478 -0.040 0.056 -0.036 0.070 57479 -0.026 0.056 -0.007 0.070 57480 -0.039 0.056 -0.027 0.070 57481 -0.052 0.119 -0.087 0.010 57482 -0.042 0.119 -0.110 0.010 57483 -0.014 0.119 -0.093 0.010 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).