********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 28 April 2016 Vol. XXIX 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 = -0.1 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 22 57500 0.02215 .00009 0.45877 .00009 -0.121971 0.000006 16 4 23 57501 0.02406 .00009 0.46021 .00009 -0.123587 0.000008 16 4 24 57502 0.02577 .00009 0.46183 .00009 -0.125140 0.000008 16 4 25 57503 0.02708 .00009 0.46353 .00009 -0.126528 0.000017 16 4 26 57504 0.02809 .00009 0.46534 .00009 -0.127823 0.000016 16 4 27 57505 0.02893 .00009 0.46702 .00009 -0.129037 0.000017 16 4 28 57506 0.02973 .00009 0.46856 .00009 -0.130372 0.000018 _______________________________________________________________________ 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 = 0.1117 - 0.1071 cos A + 0.0827 sin A + 0.0262 cos C + 0.0269 sin C y = 0.3641 + 0.0758 cos A + 0.0995 sin A + 0.0269 cos C - 0.0262 sin C UT1-UTC = -0.1066 - 0.00144 (MJD - 57514) - (UT2-UT1) where A = 2*pi*(MJD-57506)/365.25 and C = 2*pi*(MJD-57506)/435. TAI-UTC(MJD 57507) = 36.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-57506)**0.80 S t = 0.00025 (MJD-57506)**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 29 57507 0.0308 0.4698 -0.13174 2016 4 30 57508 0.0320 0.4710 -0.13319 2016 5 1 57509 0.0335 0.4721 -0.13474 2016 5 2 57510 0.0352 0.4731 -0.13645 2016 5 3 57511 0.0370 0.4741 -0.13834 2016 5 4 57512 0.0388 0.4750 -0.14037 2016 5 5 57513 0.0407 0.4760 -0.14245 2016 5 6 57514 0.0426 0.4770 -0.14446 2016 5 7 57515 0.0444 0.4779 -0.14633 2016 5 8 57516 0.0463 0.4787 -0.14801 2016 5 9 57517 0.0482 0.4796 -0.14949 2016 5 10 57518 0.0502 0.4804 -0.15084 2016 5 11 57519 0.0523 0.4812 -0.15213 2016 5 12 57520 0.0544 0.4819 -0.15338 2016 5 13 57521 0.0565 0.4827 -0.15465 2016 5 14 57522 0.0587 0.4835 -0.15594 2016 5 15 57523 0.0609 0.4842 -0.15726 2016 5 16 57524 0.0630 0.4849 -0.15857 2016 5 17 57525 0.0652 0.4856 -0.15988 2016 5 18 57526 0.0673 0.4863 -0.16115 2016 5 19 57527 0.0695 0.4869 -0.16237 2016 5 20 57528 0.0716 0.4874 -0.16352 2016 5 21 57529 0.0738 0.4879 -0.16459 2016 5 22 57530 0.0760 0.4884 -0.16556 2016 5 23 57531 0.0782 0.4889 -0.16645 2016 5 24 57532 0.0804 0.4893 -0.16729 2016 5 25 57533 0.0826 0.4897 -0.16813 2016 5 26 57534 0.0848 0.4901 -0.16902 2016 5 27 57535 0.0870 0.4904 -0.17000 2016 5 28 57536 0.0893 0.4907 -0.17110 2016 5 29 57537 0.0915 0.4909 -0.17235 2016 5 30 57538 0.0937 0.4911 -0.17375 2016 5 31 57539 0.0959 0.4913 -0.17528 2016 6 1 57540 0.0982 0.4914 -0.17687 2016 6 2 57541 0.1004 0.4915 -0.17846 2016 6 3 57542 0.1027 0.4916 -0.17996 2016 6 4 57543 0.1049 0.4916 -0.18131 2016 6 5 57544 0.1072 0.4916 -0.18249 2016 6 6 57545 0.1094 0.4916 -0.18354 2016 6 7 57546 0.1117 0.4915 -0.18451 2016 6 8 57547 0.1139 0.4914 -0.18545 2016 6 9 57548 0.1162 0.4913 -0.18639 2016 6 10 57549 0.1184 0.4911 -0.18735 2016 6 11 57550 0.1206 0.4909 -0.18834 2016 6 12 57551 0.1229 0.4907 -0.18934 2016 6 13 57552 0.1251 0.4904 -0.19032 2016 6 14 57553 0.1273 0.4901 -0.19127 2016 6 15 57554 0.1296 0.4898 -0.19216 2016 6 16 57555 0.1318 0.4894 -0.19296 2016 6 17 57556 0.1340 0.4890 -0.19367 2016 6 18 57557 0.1362 0.4885 -0.19429 2016 6 19 57558 0.1384 0.4881 -0.19484 2016 6 20 57559 0.1405 0.4876 -0.19532 2016 6 21 57560 0.1427 0.4870 -0.19577 2016 6 22 57561 0.1449 0.4865 -0.19622 2016 6 23 57562 0.1470 0.4858 -0.19673 2016 6 24 57563 0.1492 0.4852 -0.19734 2016 6 25 57564 0.1513 0.4845 -0.19809 2016 6 26 57565 0.1534 0.4838 -0.19897 2016 6 27 57566 0.1555 0.4831 -0.19997 2016 6 28 57567 0.1576 0.4823 -0.20105 2016 6 29 57568 0.1597 0.4815 -0.20214 2016 6 30 57569 0.1617 0.4807 -0.20319 2016 7 1 57570 0.1638 0.4798 -0.20412 2016 7 2 57571 0.1658 0.4789 -0.20493 2016 7 3 57572 0.1678 0.4780 -0.20562 2016 7 4 57573 0.1698 0.4771 -0.20623 2016 7 5 57574 0.1718 0.4761 -0.20683 2016 7 6 57575 0.1738 0.4751 -0.20745 2016 7 7 57576 0.1757 0.4740 -0.20813 2016 7 8 57577 0.1777 0.4730 -0.20887 2016 7 9 57578 0.1796 0.4718 -0.20965 2016 7 10 57579 0.1815 0.4707 -0.21044 2016 7 11 57580 0.1833 0.4696 -0.21123 2016 7 12 57581 0.1852 0.4684 -0.21198 2016 7 13 57582 0.1870 0.4671 -0.21267 2016 7 14 57583 0.1888 0.4659 -0.21328 2016 7 15 57584 0.1906 0.4646 -0.21382 2016 7 16 57585 0.1923 0.4633 -0.21428 2016 7 17 57586 0.1941 0.4620 -0.21468 2016 7 18 57587 0.1958 0.4606 -0.21506 2016 7 19 57588 0.1974 0.4593 -0.21545 2016 7 20 57589 0.1991 0.4578 -0.21591 2016 7 21 57590 0.2007 0.4564 -0.21648 2016 7 22 57591 0.2024 0.4550 -0.21720 2016 7 23 57592 0.2039 0.4535 -0.21807 2016 7 24 57593 0.2055 0.4520 -0.21907 2016 7 25 57594 0.2070 0.4504 -0.22014 2016 7 26 57595 0.2085 0.4489 -0.22123 2016 7 27 57596 0.2100 0.4473 -0.22226 2016 7 28 57597 0.2114 0.4457 -0.22318 2016 7 29 57598 0.2128 0.4441 -0.22396 2016 7 30 57599 0.2142 0.4425 -0.22462 2016 7 31 57600 0.2156 0.4408 -0.22519 2016 8 1 57601 0.2169 0.4391 -0.22573 2016 8 2 57602 0.2182 0.4374 -0.22628 2016 8 3 57603 0.2195 0.4357 -0.22688 2016 8 4 57604 0.2207 0.4339 -0.22755 2016 8 5 57605 0.2219 0.4322 -0.22828 2016 8 6 57606 0.2231 0.4304 -0.22905 2016 8 7 57607 0.2242 0.4286 -0.22982 2016 8 8 57608 0.2253 0.4268 -0.23058 2016 8 9 57609 0.2264 0.4249 -0.23130 2016 8 10 57610 0.2274 0.4231 -0.23196 2016 8 11 57611 0.2285 0.4212 -0.23255 2016 8 12 57612 0.2294 0.4193 -0.23308 2016 8 13 57613 0.2304 0.4174 -0.23356 2016 8 14 57614 0.2313 0.4155 -0.23403 2016 8 15 57615 0.2322 0.4136 -0.23450 2016 8 16 57616 0.2330 0.4117 -0.23504 2016 8 17 57617 0.2338 0.4097 -0.23569 2016 8 18 57618 0.2346 0.4077 -0.23651 2016 8 19 57619 0.2353 0.4058 -0.23751 2016 8 20 57620 0.2360 0.4038 -0.23868 2016 8 21 57621 0.2367 0.4018 -0.23998 2016 8 22 57622 0.2373 0.3998 -0.24132 2016 8 23 57623 0.2379 0.3977 -0.24263 2016 8 24 57624 0.2384 0.3957 -0.24384 2016 8 25 57625 0.2389 0.3937 -0.24493 2016 8 26 57626 0.2394 0.3916 -0.24590 2016 8 27 57627 0.2399 0.3896 -0.24678 2016 8 28 57628 0.2403 0.3875 -0.24761 2016 8 29 57629 0.2407 0.3855 -0.24846 2016 8 30 57630 0.2410 0.3834 -0.24936 2016 8 31 57631 0.2413 0.3813 -0.25035 2016 9 1 57632 0.2415 0.3792 -0.25142 2016 9 2 57633 0.2418 0.3772 -0.25256 2016 9 3 57634 0.2420 0.3751 -0.25374 2016 9 4 57635 0.2421 0.3730 -0.25492 2016 9 5 57636 0.2422 0.3709 -0.25608 2016 9 6 57637 0.2423 0.3688 -0.25720 2016 9 7 57638 0.2423 0.3667 -0.25826 2016 9 8 57639 0.2423 0.3646 -0.25926 2016 9 9 57640 0.2423 0.3625 -0.26021 2016 9 10 57641 0.2422 0.3604 -0.26114 2016 9 11 57642 0.2421 0.3583 -0.26207 2016 9 12 57643 0.2419 0.3562 -0.26306 2016 9 13 57644 0.2417 0.3541 -0.26415 2016 9 14 57645 0.2415 0.3520 -0.26539 2016 9 15 57646 0.2413 0.3499 -0.26683 2016 9 16 57647 0.2410 0.3479 -0.26847 2016 9 17 57648 0.2406 0.3458 -0.27027 2016 9 18 57649 0.2402 0.3437 -0.27218 2016 9 19 57650 0.2398 0.3416 -0.27410 2016 9 20 57651 0.2394 0.3396 -0.27593 2016 9 21 57652 0.2389 0.3375 -0.27764 2016 9 22 57653 0.2384 0.3355 -0.27919 2016 9 23 57654 0.2378 0.3334 -0.28062 2016 9 24 57655 0.2372 0.3314 -0.28198 2016 9 25 57656 0.2366 0.3294 -0.28332 2016 9 26 57657 0.2359 0.3274 -0.28470 2016 9 27 57658 0.2352 0.3254 -0.28615 2016 9 28 57659 0.2345 0.3234 -0.28768 2016 9 29 57660 0.2337 0.3214 -0.28928 2016 9 30 57661 0.2329 0.3194 -0.29092 2016 10 1 57662 0.2321 0.3175 -0.29258 2016 10 2 57663 0.2312 0.3156 -0.29423 2016 10 3 57664 0.2303 0.3136 -0.29583 2016 10 4 57665 0.2293 0.3117 -0.29737 2016 10 5 57666 0.2283 0.3098 -0.29884 2016 10 6 57667 0.2273 0.3079 -0.30025 2016 10 7 57668 0.2263 0.3061 -0.30160 2016 10 8 57669 0.2252 0.3042 -0.30294 2016 10 9 57670 0.2241 0.3024 -0.30431 2016 10 10 57671 0.2229 0.3005 -0.30575 2016 10 11 57672 0.2218 0.2987 -0.30731 2016 10 12 57673 0.2205 0.2969 -0.30903 2016 10 13 57674 0.2193 0.2952 -0.31096 2016 10 14 57675 0.2180 0.2934 -0.31307 2016 10 15 57676 0.2167 0.2917 -0.31533 2016 10 16 57677 0.2154 0.2900 -0.31766 2016 10 17 57678 0.2140 0.2883 -0.31995 2016 10 18 57679 0.2126 0.2866 -0.32213 2016 10 19 57680 0.2112 0.2850 -0.32415 2016 10 20 57681 0.2098 0.2834 -0.32602 2016 10 21 57682 0.2083 0.2818 -0.32777 2016 10 22 57683 0.2068 0.2802 -0.32948 2016 10 23 57684 0.2052 0.2786 -0.33120 2016 10 24 57685 0.2037 0.2771 -0.33296 2016 10 25 57686 0.2021 0.2756 -0.33478 2016 10 26 57687 0.2004 0.2741 -0.33667 2016 10 27 57688 0.1988 0.2726 -0.33860 2016 10 28 57689 0.1971 0.2712 -0.34056 2016 10 29 57690 0.1954 0.2698 -0.34251 2016 10 30 57691 0.1937 0.2684 -0.34443 2016 10 31 57692 0.1920 0.2671 -0.34629 2016 11 1 57693 0.1902 0.2657 -0.34808 2016 11 2 57694 0.1884 0.2644 -0.34979 2016 11 3 57695 0.1866 0.2631 -0.35142 2016 11 4 57696 0.1848 0.2619 -0.35298 2016 11 5 57697 0.1829 0.2607 -0.35449 2016 11 6 57698 0.1810 0.2595 -0.35598 2016 11 7 57699 0.1791 0.2583 -0.35749 2016 11 8 57700 0.1772 0.2572 -0.35908 2016 11 9 57701 0.1753 0.2561 -0.36077 2016 11 10 57702 0.1733 0.2550 -0.36261 2016 11 11 57703 0.1714 0.2539 -0.36458 2016 11 12 57704 0.1694 0.2529 -0.36665 2016 11 13 57705 0.1673 0.2519 -0.36874 2016 11 14 57706 0.1653 0.2510 -0.37078 2016 11 15 57707 0.1633 0.2501 -0.37269 2016 11 16 57708 0.1612 0.2492 -0.37446 2016 11 17 57709 0.1591 0.2483 -0.37610 2016 11 18 57710 0.1570 0.2475 -0.37768 2016 11 19 57711 0.1549 0.2467 -0.37924 2016 11 20 57712 0.1528 0.2459 -0.38083 2016 11 21 57713 0.1507 0.2452 -0.38247 2016 11 22 57714 0.1486 0.2445 -0.38415 2016 11 23 57715 0.1464 0.2438 -0.38587 2016 11 24 57716 0.1442 0.2432 -0.38758 2016 11 25 57717 0.1421 0.2426 -0.38928 2016 11 26 57718 0.1399 0.2420 -0.39091 2016 11 27 57719 0.1377 0.2415 -0.39246 2016 11 28 57720 0.1355 0.2410 -0.39391 2016 11 29 57721 0.1333 0.2405 -0.39528 2016 11 30 57722 0.1310 0.2401 -0.39656 2016 12 1 57723 0.1288 0.2397 -0.39775 2016 12 2 57724 0.1266 0.2393 -0.39890 2016 12 3 57725 0.1243 0.2390 -0.40004 2016 12 4 57726 0.1221 0.2387 -0.40122 2016 12 5 57727 0.1199 0.2384 -0.40251 2016 12 6 57728 0.1176 0.2382 -0.40391 2016 12 7 57729 0.1153 0.2380 -0.40541 2016 12 8 57730 0.1131 0.2378 -0.40702 2016 12 9 57731 0.1108 0.2377 -0.40875 2016 12 10 57732 0.1086 0.2376 -0.41060 2016 12 11 57733 0.1063 0.2375 -0.41249 2016 12 12 57734 0.1041 0.2375 -0.41432 2016 12 13 57735 0.1018 0.2375 -0.41605 2016 12 14 57736 0.0995 0.2376 -0.41768 2016 12 15 57737 0.0973 0.2377 -0.41922 2016 12 16 57738 0.0950 0.2378 -0.42068 2016 12 17 57739 0.0928 0.2379 -0.42213 2016 12 18 57740 0.0905 0.2381 -0.42365 2016 12 19 57741 0.0883 0.2383 -0.42527 2016 12 20 57742 0.0860 0.2386 -0.42692 2016 12 21 57743 0.0838 0.2389 -0.42859 2016 12 22 57744 0.0816 0.2392 -0.43016 2016 12 23 57745 0.0794 0.2395 -0.43168 2016 12 24 57746 0.0771 0.2399 -0.43309 2016 12 25 57747 0.0749 0.2404 -0.43442 2016 12 26 57748 0.0727 0.2408 -0.43571 2016 12 27 57749 0.0706 0.2413 -0.43691 2016 12 28 57750 0.0684 0.2418 -0.43807 2016 12 29 57751 0.0662 0.2424 -0.43923 2016 12 30 57752 0.0641 0.2430 -0.44033 2016 12 31 57753 0.0619 0.2436 -0.44142 2017 1 1 57754 0.0598 0.2443 -0.44269 2017 1 2 57755 0.0577 0.2449 -0.44414 2017 1 3 57756 0.0555 0.2457 -0.44575 2017 1 4 57757 0.0535 0.2464 -0.44756 2017 1 5 57758 0.0514 0.2472 -0.44949 2017 1 6 57759 0.0493 0.2480 -0.45149 2017 1 7 57760 0.0473 0.2489 -0.45350 2017 1 8 57761 0.0452 0.2498 -0.45550 2017 1 9 57762 0.0432 0.2507 -0.45737 2017 1 10 57763 0.0412 0.2516 -0.45908 2017 1 11 57764 0.0392 0.2526 -0.46067 2017 1 12 57765 0.0373 0.2536 -0.46212 2017 1 13 57766 0.0353 0.2546 -0.46357 2017 1 14 57767 0.0334 0.2557 -0.46509 2017 1 15 57768 0.0315 0.2568 -0.46670 2017 1 16 57769 0.0296 0.2579 -0.46840 2017 1 17 57770 0.0278 0.2590 -0.47010 2017 1 18 57771 0.0259 0.2602 -0.47176 2017 1 19 57772 0.0241 0.2614 -0.47338 2017 1 20 57773 0.0223 0.2627 -0.47496 2017 1 21 57774 0.0205 0.2639 -0.47643 2017 1 22 57775 0.0188 0.2652 -0.47776 2017 1 23 57776 0.0171 0.2665 -0.47898 2017 1 24 57777 0.0154 0.2679 -0.48018 2017 1 25 57778 0.0137 0.2692 -0.48140 2017 1 26 57779 0.0120 0.2706 -0.48264 2017 1 27 57780 0.0104 0.2720 -0.48395 2017 1 28 57781 0.0088 0.2735 -0.48539 2017 1 29 57782 0.0072 0.2750 -0.48691 2017 1 30 57783 0.0057 0.2765 -0.48861 2017 1 31 57784 0.0042 0.2780 -0.49044 2017 2 1 57785 0.0027 0.2795 -0.49239 2017 2 2 57786 0.0012 0.2811 -0.49444 2017 2 3 57787 -0.0002 0.2827 -0.49648 2017 2 4 57788 -0.0016 0.2843 -0.49845 2017 2 5 57789 -0.0030 0.2859 -0.50038 2017 2 6 57790 -0.0043 0.2875 -0.50213 2017 2 7 57791 -0.0057 0.2892 -0.50378 2017 2 8 57792 -0.0069 0.2909 -0.50537 2017 2 9 57793 -0.0082 0.2926 -0.50694 2017 2 10 57794 -0.0094 0.2943 -0.50856 2017 2 11 57795 -0.0106 0.2961 -0.51024 2017 2 12 57796 -0.0118 0.2978 -0.51198 2017 2 13 57797 -0.0129 0.2996 -0.51373 2017 2 14 57798 -0.0140 0.3014 -0.51555 2017 2 15 57799 -0.0150 0.3032 -0.51734 2017 2 16 57800 -0.0161 0.3051 -0.51905 2017 2 17 57801 -0.0171 0.3069 -0.52072 2017 2 18 57802 -0.0180 0.3088 -0.52222 2017 2 19 57803 -0.0190 0.3106 -0.52370 2017 2 20 57804 -0.0199 0.3125 -0.52510 2017 2 21 57805 -0.0207 0.3144 -0.52647 2017 2 22 57806 -0.0215 0.3164 -0.52779 2017 2 23 57807 -0.0223 0.3183 -0.52921 2017 2 24 57808 -0.0231 0.3202 -0.53074 2017 2 25 57809 -0.0238 0.3222 -0.53246 2017 2 26 57810 -0.0245 0.3242 -0.53431 2017 2 27 57811 -0.0251 0.3261 -0.53639 2017 2 28 57812 -0.0258 0.3281 -0.53865 2017 3 1 57813 -0.0263 0.3301 -0.54110 2017 3 2 57814 -0.0269 0.3321 -0.54365 2017 3 3 57815 -0.0274 0.3341 -0.54620 2017 3 4 57816 -0.0279 0.3361 -0.54861 2017 3 5 57817 -0.0283 0.3382 -0.55084 2017 3 6 57818 -0.0287 0.3402 -0.55301 2017 3 7 57819 -0.0291 0.3422 -0.55500 2017 3 8 57820 -0.0294 0.3443 -0.55703 2017 3 9 57821 -0.0297 0.3463 -0.55902 2017 3 10 57822 -0.0299 0.3484 -0.56104 2017 3 11 57823 -0.0301 0.3504 -0.56309 2017 3 12 57824 -0.0303 0.3525 -0.56523 2017 3 13 57825 -0.0304 0.3546 -0.56742 2017 3 14 57826 -0.0306 0.3566 -0.56963 2017 3 15 57827 -0.0306 0.3587 -0.57183 2017 3 16 57828 -0.0307 0.3608 -0.57399 2017 3 17 57829 -0.0306 0.3628 -0.57601 2017 3 18 57830 -0.0306 0.3649 -0.57788 2017 3 19 57831 -0.0305 0.3670 -0.57960 2017 3 20 57832 -0.0304 0.3690 -0.58121 2017 3 21 57833 -0.0303 0.3711 -0.58267 2017 3 22 57834 -0.0301 0.3732 -0.58415 2017 3 23 57835 -0.0298 0.3752 -0.58566 2017 3 24 57836 -0.0296 0.3773 -0.58716 2017 3 25 57837 -0.0293 0.3793 -0.58874 2017 3 26 57838 -0.0289 0.3814 -0.59040 2017 3 27 57839 -0.0286 0.3834 -0.59217 2017 3 28 57840 -0.0282 0.3854 -0.59418 2017 3 29 57841 -0.0277 0.3875 -0.59613 2017 3 30 57842 -0.0272 0.3895 -0.59810 2017 3 31 57843 -0.0267 0.3915 -0.60001 2017 4 1 57844 -0.0262 0.3935 -0.60177 2017 4 2 57845 -0.0256 0.3955 -0.60341 2017 4 3 57846 -0.0250 0.3975 -0.60496 2017 4 4 57847 -0.0243 0.3995 -0.60657 2017 4 5 57848 -0.0236 0.4014 -0.60822 2017 4 6 57849 -0.0229 0.4034 -0.60988 2017 4 7 57850 -0.0221 0.4053 -0.61159 2017 4 8 57851 -0.0213 0.4073 -0.61335 2017 4 9 57852 -0.0205 0.4092 -0.61516 2017 4 10 57853 -0.0196 0.4111 -0.61693 2017 4 11 57854 -0.0187 0.4130 -0.61867 2017 4 12 57855 -0.0178 0.4149 -0.62034 2017 4 13 57856 -0.0169 0.4167 -0.62194 2017 4 14 57857 -0.0159 0.4186 -0.62344 2017 4 15 57858 -0.0148 0.4204 -0.62489 2017 4 16 57859 -0.0138 0.4223 -0.62619 2017 4 17 57860 -0.0127 0.4241 -0.62751 2017 4 18 57861 -0.0116 0.4258 -0.62878 2017 4 19 57862 -0.0104 0.4276 -0.63012 2017 4 20 57863 -0.0092 0.4294 -0.63156 2017 4 21 57864 -0.0080 0.4311 -0.63323 2017 4 22 57865 -0.0068 0.4328 -0.63505 2017 4 23 57866 -0.0055 0.4345 -0.63711 2017 4 24 57867 -0.0042 0.4362 -0.63931 2017 4 25 57868 -0.0029 0.4378 -0.64158 2017 4 26 57869 -0.0015 0.4395 -0.64385 2017 4 27 57870 -0.0001 0.4411 -0.64604 2017 4 28 57871 0.0013 0.4427 -0.64804 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) 57484 -92.08 0.30 -13.00 0.01 57485 -91.85 0.30 -12.79 0.01 57486 -91.97 0.30 -12.72 0.01 57487 -92.43 0.30 -12.81 0.15 57488 -92.92 0.30 -12.94 0.06 57489 -93.05 0.30 -13.05 0.06 57490 -92.74 0.30 -13.20 0.06 57491 -92.25 0.30 -13.40 0.06 57492 -91.99 0.30 -13.55 0.06 57493 -92.09 0.30 -13.57 0.06 57494 -92.28 0.30 -13.52 0.15 57495 -92.23 0.30 -13.47 0.01 57496 -91.97 0.30 -13.41 0.01 57497 -91.78 0.30 -13.25 0.01 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 57484 -0.003 0.119 -0.034 0.010 57485 0.000 0.119 0.012 0.010 57486 -0.004 0.119 0.039 0.010 57487 -0.006 0.119 0.064 0.150 57488 -0.010 0.119 0.070 0.060 57489 -0.003 0.119 0.074 0.060 57490 0.004 0.119 0.092 0.060 57491 0.019 0.119 0.113 0.060 57492 0.046 0.119 0.117 0.060 57493 0.076 0.119 0.110 0.060 57494 0.094 0.119 0.096 0.150 57495 0.099 0.119 0.090 0.010 57496 0.091 0.119 0.088 0.010 57497 0.069 0.119 0.111 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).