********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 15 May 2008 Vol. XXI No. 020 ______________________________________________________________________ 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 = -0.4 seconds beginning 13 March 2008 at 0000 UTC Beginning 1 January 2006: TAI-UTC(BIPM) = 33.000 000 seconds ________________________________________________________________________ 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 8 5 9 54595 .04243 .00009 .54068 .00009 -.405423 .000021 8 5 10 54596 .04483 .00009 .54146 .00009 -.406360 .000019 8 5 11 54597 .04730 .00009 .54188 .00009 -.407492 .000017 8 5 12 54598 .04995 .00009 .54225 .00009 -.408921 .000032 8 5 13 54599 .05286 .00010 .54253 .00009 -.410503 .000037 8 5 14 54600 .05636 .00010 .54264 .00010 -.412175 .000048 8 5 15 54601 .06017 .00009 .54272 .00010 -.413861 .000057 _______________________________________________________________________ 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 = .0590 - .0224 cos A + .1153 sin A + .0281 cos C + .0796 sin C y = .3514 + .1057 cos A + .0274 sin A + .0796 cos C - .0281 sin C UT1-UTC = -.3832 - .00079 (MJD - 54609) - (UT2-UT1) where A = 2*pi*(MJD-54601)/365.25 and C = 2*pi*(MJD-54601)/435. TAI-UTC(MJD 54602) = 33.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-54601)**0.80 S t = 0.00025 (MJD-54601)**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) 2008 5 16 54602 0.0638 0.5429 -0.41547 2008 5 17 54603 0.0675 0.5430 -0.41690 2008 5 18 54604 0.0709 0.5430 -0.41810 2008 5 19 54605 0.0743 0.5430 -0.41909 2008 5 20 54606 0.0775 0.5430 -0.41986 2008 5 21 54607 0.0808 0.5428 -0.42042 2008 5 22 54608 0.0840 0.5427 -0.42082 2008 5 23 54609 0.0873 0.5424 -0.42117 2008 5 24 54610 0.0906 0.5421 -0.42157 2008 5 25 54611 0.0939 0.5417 -0.42214 2008 5 26 54612 0.0972 0.5413 -0.42293 2008 5 27 54613 0.1005 0.5408 -0.42396 2008 5 28 54614 0.1038 0.5402 -0.42523 2008 5 29 54615 0.1071 0.5396 -0.42666 2008 5 30 54616 0.1103 0.5390 -0.42817 2008 5 31 54617 0.1136 0.5383 -0.42963 2008 6 1 54618 0.1168 0.5376 -0.43091 2008 6 2 54619 0.1200 0.5368 -0.43192 2008 6 3 54620 0.1232 0.5359 -0.43261 2008 6 4 54621 0.1264 0.5350 -0.43303 2008 6 5 54622 0.1295 0.5341 -0.43331 2008 6 6 54623 0.1327 0.5331 -0.43360 2008 6 7 54624 0.1358 0.5321 -0.43402 2008 6 8 54625 0.1390 0.5310 -0.43461 2008 6 9 54626 0.1421 0.5298 -0.43535 2008 6 10 54627 0.1452 0.5287 -0.43615 2008 6 11 54628 0.1482 0.5274 -0.43692 2008 6 12 54629 0.1513 0.5262 -0.43756 2008 6 13 54630 0.1543 0.5248 -0.43801 2008 6 14 54631 0.1573 0.5235 -0.43825 2008 6 15 54632 0.1603 0.5220 -0.43827 2008 6 16 54633 0.1632 0.5206 -0.43810 2008 6 17 54634 0.1661 0.5191 -0.43776 2008 6 18 54635 0.1690 0.5175 -0.43730 2008 6 19 54636 0.1719 0.5159 -0.43679 2008 6 20 54637 0.1748 0.5143 -0.43633 2008 6 21 54638 0.1776 0.5126 -0.43596 2008 6 22 54639 0.1804 0.5109 -0.43577 2008 6 23 54640 0.1831 0.5091 -0.43577 2008 6 24 54641 0.1859 0.5073 -0.43596 2008 6 25 54642 0.1886 0.5055 -0.43630 2008 6 26 54643 0.1912 0.5036 -0.43673 2008 6 27 54644 0.1939 0.5016 -0.43715 2008 6 28 54645 0.1965 0.4997 -0.43746 2008 6 29 54646 0.1991 0.4976 -0.43755 2008 6 30 54647 0.2016 0.4956 -0.43739 2008 7 1 54648 0.2041 0.4935 -0.43698 2008 7 2 54649 0.2066 0.4914 -0.43642 2008 7 3 54650 0.2090 0.4892 -0.43586 2008 7 4 54651 0.2114 0.4870 -0.43543 2008 7 5 54652 0.2138 0.4847 -0.43521 2008 7 6 54653 0.2161 0.4825 -0.43521 2008 7 7 54654 0.2184 0.4802 -0.43536 2008 7 8 54655 0.2206 0.4778 -0.43557 2008 7 9 54656 0.2228 0.4754 -0.43572 2008 7 10 54657 0.2250 0.4730 -0.43574 2008 7 11 54658 0.2271 0.4706 -0.43559 2008 7 12 54659 0.2292 0.4681 -0.43524 2008 7 13 54660 0.2313 0.4656 -0.43471 2008 7 14 54661 0.2333 0.4630 -0.43403 2008 7 15 54662 0.2352 0.4605 -0.43325 2008 7 16 54663 0.2371 0.4579 -0.43243 2008 7 17 54664 0.2390 0.4552 -0.43165 2008 7 18 54665 0.2408 0.4526 -0.43099 2008 7 19 54666 0.2426 0.4499 -0.43052 2008 7 20 54667 0.2443 0.4472 -0.43027 2008 7 21 54668 0.2460 0.4444 -0.43024 2008 7 22 54669 0.2477 0.4416 -0.43041 2008 7 23 54670 0.2493 0.4388 -0.43071 2008 7 24 54671 0.2508 0.4360 -0.43103 2008 7 25 54672 0.2523 0.4332 -0.43128 2008 7 26 54673 0.2538 0.4303 -0.43137 2008 7 27 54674 0.2552 0.4274 -0.43124 2008 7 28 54675 0.2565 0.4245 -0.43089 2008 7 29 54676 0.2578 0.4216 -0.43040 2008 7 30 54677 0.2591 0.4187 -0.42989 2008 7 31 54678 0.2603 0.4157 -0.42950 2008 8 1 54679 0.2615 0.4127 -0.42933 2008 8 2 54680 0.2626 0.4097 -0.42942 2008 8 3 54681 0.2636 0.4067 -0.42973 2008 8 4 54682 0.2646 0.4036 -0.43017 2008 8 5 54683 0.2656 0.4006 -0.43062 2008 8 6 54684 0.2665 0.3975 -0.43097 2008 8 7 54685 0.2673 0.3944 -0.43116 2008 8 8 54686 0.2681 0.3913 -0.43115 2008 8 9 54687 0.2689 0.3882 -0.43094 2008 8 10 54688 0.2696 0.3851 -0.43056 2008 8 11 54689 0.2702 0.3820 -0.43007 2008 8 12 54690 0.2708 0.3789 -0.42951 2008 8 13 54691 0.2713 0.3757 -0.42897 2008 8 14 54692 0.2718 0.3726 -0.42853 2008 8 15 54693 0.2722 0.3694 -0.42826 2008 8 16 54694 0.2726 0.3662 -0.42820 2008 8 17 54695 0.2729 0.3630 -0.42840 2008 8 18 54696 0.2732 0.3599 -0.42882 2008 8 19 54697 0.2734 0.3567 -0.42941 2008 8 20 54698 0.2736 0.3535 -0.43006 2008 8 21 54699 0.2737 0.3503 -0.43067 2008 8 22 54700 0.2737 0.3471 -0.43113 2008 8 23 54701 0.2737 0.3439 -0.43139 2008 8 24 54702 0.2737 0.3407 -0.43143 2008 8 25 54703 0.2736 0.3375 -0.43132 2008 8 26 54704 0.2734 0.3344 -0.43116 2008 8 27 54705 0.2732 0.3312 -0.43108 2008 8 28 54706 0.2729 0.3280 -0.43117 2008 8 29 54707 0.2726 0.3248 -0.43152 2008 8 30 54708 0.2722 0.3216 -0.43211 2008 8 31 54709 0.2718 0.3185 -0.43288 2008 9 1 54710 0.2713 0.3153 -0.43372 2008 9 2 54711 0.2708 0.3122 -0.43452 2008 9 3 54712 0.2702 0.3090 -0.43518 2008 9 4 54713 0.2695 0.3059 -0.43565 2008 9 5 54714 0.2688 0.3027 -0.43593 2008 9 6 54715 0.2681 0.2996 -0.43602 2008 9 7 54716 0.2673 0.2965 -0.43598 2008 9 8 54717 0.2664 0.2934 -0.43586 2008 9 9 54718 0.2655 0.2903 -0.43574 2008 9 10 54719 0.2646 0.2873 -0.43570 2008 9 11 54720 0.2636 0.2842 -0.43580 2008 9 12 54721 0.2625 0.2812 -0.43611 2008 9 13 54722 0.2614 0.2782 -0.43666 2008 9 14 54723 0.2602 0.2752 -0.43746 2008 9 15 54724 0.2590 0.2722 -0.43846 2008 9 16 54725 0.2578 0.2692 -0.43956 2008 9 17 54726 0.2564 0.2663 -0.44066 2008 9 18 54727 0.2551 0.2633 -0.44163 2008 9 19 54728 0.2537 0.2604 -0.44238 2008 9 20 54729 0.2522 0.2575 -0.44288 2008 9 21 54730 0.2507 0.2547 -0.44320 2008 9 22 54731 0.2491 0.2518 -0.44343 2008 9 23 54732 0.2475 0.2490 -0.44370 2008 9 24 54733 0.2459 0.2462 -0.44412 2008 9 25 54734 0.2442 0.2435 -0.44477 2008 9 26 54735 0.2424 0.2407 -0.44565 2008 9 27 54736 0.2407 0.2380 -0.44674 2008 9 28 54737 0.2388 0.2353 -0.44793 2008 9 29 54738 0.2369 0.2326 -0.44913 2008 9 30 54739 0.2350 0.2300 -0.45024 2008 10 1 54740 0.2330 0.2274 -0.45118 2008 10 2 54741 0.2310 0.2248 -0.45192 2008 10 3 54742 0.2290 0.2223 -0.45248 2008 10 4 54743 0.2269 0.2198 -0.45287 2008 10 5 54744 0.2247 0.2173 -0.45317 2008 10 6 54745 0.2225 0.2149 -0.45344 2008 10 7 54746 0.2203 0.2125 -0.45376 2008 10 8 54747 0.2181 0.2101 -0.45419 2008 10 9 54748 0.2158 0.2077 -0.45481 2008 10 10 54749 0.2134 0.2054 -0.45564 2008 10 11 54750 0.2110 0.2031 -0.45672 2008 10 12 54751 0.2086 0.2009 -0.45801 2008 10 13 54752 0.2062 0.1987 -0.45947 2008 10 14 54753 0.2037 0.1965 -0.46097 2008 10 15 54754 0.2011 0.1944 -0.46240 2008 10 16 54755 0.1986 0.1923 -0.46364 2008 10 17 54756 0.1960 0.1903 -0.46462 2008 10 18 54757 0.1933 0.1883 -0.46537 2008 10 19 54758 0.1907 0.1863 -0.46598 2008 10 20 54759 0.1880 0.1844 -0.46657 2008 10 21 54760 0.1853 0.1825 -0.46729 2008 10 22 54761 0.1825 0.1806 -0.46819 2008 10 23 54762 0.1797 0.1788 -0.46932 2008 10 24 54763 0.1769 0.1771 -0.47063 2008 10 25 54764 0.1740 0.1754 -0.47205 2008 10 26 54765 0.1711 0.1737 -0.47349 2008 10 27 54766 0.1682 0.1721 -0.47486 2008 10 28 54767 0.1653 0.1705 -0.47607 2008 10 29 54768 0.1624 0.1689 -0.47710 2008 10 30 54769 0.1594 0.1674 -0.47792 2008 10 31 54770 0.1564 0.1660 -0.47858 2008 11 1 54771 0.1533 0.1646 -0.47910 2008 11 2 54772 0.1503 0.1632 -0.47956 2008 11 3 54773 0.1472 0.1619 -0.48003 2008 11 4 54774 0.1441 0.1607 -0.48059 2008 11 5 54775 0.1410 0.1594 -0.48129 2008 11 6 54776 0.1378 0.1583 -0.48218 2008 11 7 54777 0.1347 0.1571 -0.48327 2008 11 8 54778 0.1315 0.1561 -0.48458 2008 11 9 54779 0.1283 0.1550 -0.48607 2008 11 10 54780 0.1251 0.1541 -0.48765 2008 11 11 54781 0.1219 0.1531 -0.48922 2008 11 12 54782 0.1186 0.1523 -0.49066 2008 11 13 54783 0.1154 0.1514 -0.49188 2008 11 14 54784 0.1121 0.1506 -0.49287 2008 11 15 54785 0.1088 0.1499 -0.49369 2008 11 16 54786 0.1055 0.1492 -0.49445 2008 11 17 54787 0.1022 0.1486 -0.49532 2008 11 18 54788 0.0989 0.1480 -0.49638 2008 11 19 54789 0.0956 0.1475 -0.49768 2008 11 20 54790 0.0923 0.1470 -0.49918 2008 11 21 54791 0.0889 0.1466 -0.50080 2008 11 22 54792 0.0856 0.1462 -0.50243 2008 11 23 54793 0.0823 0.1459 -0.50397 2008 11 24 54794 0.0789 0.1456 -0.50535 2008 11 25 54795 0.0756 0.1454 -0.50653 2008 11 26 54796 0.0722 0.1452 -0.50750 2008 11 27 54797 0.0688 0.1451 -0.50828 2008 11 28 54798 0.0655 0.1450 -0.50892 2008 11 29 54799 0.0621 0.1450 -0.50948 2008 11 30 54800 0.0588 0.1450 -0.51002 2008 12 1 54801 0.0554 0.1451 -0.51061 2008 12 2 54802 0.0520 0.1452 -0.51128 2008 12 3 54803 0.0487 0.1454 -0.51207 2008 12 4 54804 0.0453 0.1457 -0.51297 2008 12 5 54805 0.0420 0.1460 -0.51398 2008 12 6 54806 0.0387 0.1463 -0.51507 2008 12 7 54807 0.0353 0.1467 -0.51619 2008 12 8 54808 0.0320 0.1471 -0.51728 2008 12 9 54809 0.0287 0.1476 -0.51825 2008 12 10 54810 0.0254 0.1481 -0.51900 2008 12 11 54811 0.0221 0.1487 -0.51949 2008 12 12 54812 0.0188 0.1494 -0.51975 2008 12 13 54813 0.0155 0.1501 -0.51990 2008 12 14 54814 0.0123 0.1508 -0.52009 2008 12 15 54815 0.0090 0.1516 -0.52046 2008 12 16 54816 0.0058 0.1524 -0.52107 2008 12 17 54817 0.0026 0.1533 -0.52190 2008 12 18 54818 -0.0006 0.1543 -0.52286 2008 12 19 54819 -0.0038 0.1552 -0.52385 2008 12 20 54820 -0.0070 0.1563 -0.52479 2008 12 21 54821 -0.0101 0.1574 -0.52560 2008 12 22 54822 -0.0132 0.1585 -0.52618 2008 12 23 54823 -0.0163 0.1597 -0.52652 2008 12 24 54824 -0.0194 0.1609 -0.52669 2008 12 25 54825 -0.0225 0.1622 -0.52679 2008 12 26 54826 -0.0255 0.1635 -0.52683 2008 12 27 54827 -0.0286 0.1649 -0.52688 2008 12 28 54828 -0.0316 0.1663 -0.52697 2008 12 29 54829 -0.0345 0.1677 -0.52713 2008 12 30 54830 -0.0375 0.1692 -0.52743 2008 12 31 54831 -0.0404 0.1708 -0.52789 2009 1 1 54832 -0.0433 0.1724 -0.52853 2009 1 2 54833 -0.0461 0.1740 -0.52934 2009 1 3 54834 -0.0490 0.1757 -0.53023 2009 1 4 54835 -0.0518 0.1774 -0.53114 2009 1 5 54836 -0.0545 0.1792 -0.53192 2009 1 6 54837 -0.0573 0.1810 -0.53255 2009 1 7 54838 -0.0600 0.1828 -0.53301 2009 1 8 54839 -0.0627 0.1847 -0.53331 2009 1 9 54840 -0.0653 0.1867 -0.53351 2009 1 10 54841 -0.0679 0.1886 -0.53380 2009 1 11 54842 -0.0705 0.1906 -0.53429 2009 1 12 54843 -0.0731 0.1927 -0.53504 2009 1 13 54844 -0.0756 0.1948 -0.53605 2009 1 14 54845 -0.0781 0.1969 -0.53730 2009 1 15 54846 -0.0805 0.1991 -0.53864 2009 1 16 54847 -0.0829 0.2013 -0.53993 2009 1 17 54848 -0.0852 0.2035 -0.54106 2009 1 18 54849 -0.0876 0.2058 -0.54202 2009 1 19 54850 -0.0899 0.2081 -0.54275 2009 1 20 54851 -0.0921 0.2104 -0.54318 2009 1 21 54852 -0.0943 0.2128 -0.54348 2009 1 22 54853 -0.0965 0.2152 -0.54369 2009 1 23 54854 -0.0986 0.2177 -0.54391 2009 1 24 54855 -0.1007 0.2201 -0.54415 2009 1 25 54856 -0.1027 0.2226 -0.54447 2009 1 26 54857 -0.1047 0.2252 -0.54496 2009 1 27 54858 -0.1066 0.2278 -0.54566 2009 1 28 54859 -0.1085 0.2304 -0.54654 2009 1 29 54860 -0.1104 0.2330 -0.54758 2009 1 30 54861 -0.1122 0.2356 -0.54873 2009 1 31 54862 -0.1140 0.2383 -0.54991 2009 2 1 54863 -0.1157 0.2410 -0.55105 2009 2 2 54864 -0.1174 0.2438 -0.55201 2009 2 3 54865 -0.1190 0.2465 -0.55280 2009 2 4 54866 -0.1206 0.2493 -0.55346 2009 2 5 54867 -0.1221 0.2521 -0.55396 2009 2 6 54868 -0.1236 0.2550 -0.55442 2009 2 7 54869 -0.1251 0.2578 -0.55497 2009 2 8 54870 -0.1264 0.2607 -0.55574 2009 2 9 54871 -0.1278 0.2636 -0.55678 2009 2 10 54872 -0.1291 0.2665 -0.55810 2009 2 11 54873 -0.1303 0.2695 -0.55961 2009 2 12 54874 -0.1315 0.2724 -0.56112 2009 2 13 54875 -0.1327 0.2754 -0.56249 2009 2 14 54876 -0.1338 0.2784 -0.56355 2009 2 15 54877 -0.1348 0.2814 -0.56431 2009 2 16 54878 -0.1358 0.2844 -0.56480 2009 2 17 54879 -0.1367 0.2875 -0.56507 2009 2 18 54880 -0.1376 0.2905 -0.56523 2009 2 19 54881 -0.1384 0.2936 -0.56534 2009 2 20 54882 -0.1392 0.2967 -0.56549 2009 2 21 54883 -0.1400 0.2998 -0.56576 2009 2 22 54884 -0.1406 0.3029 -0.56626 2009 2 23 54885 -0.1413 0.3060 -0.56698 2009 2 24 54886 -0.1418 0.3091 -0.56795 2009 2 25 54887 -0.1424 0.3122 -0.56911 2009 2 26 54888 -0.1428 0.3154 -0.57038 2009 2 27 54889 -0.1432 0.3185 -0.57166 2009 2 28 54890 -0.1436 0.3217 -0.57284 2009 3 1 54891 -0.1439 0.3248 -0.57393 2009 3 2 54892 -0.1442 0.3280 -0.57485 2009 3 3 54893 -0.1444 0.3311 -0.57561 2009 3 4 54894 -0.1445 0.3343 -0.57627 2009 3 5 54895 -0.1446 0.3375 -0.57687 2009 3 6 54896 -0.1447 0.3407 -0.57748 2009 3 7 54897 -0.1446 0.3438 -0.57830 2009 3 8 54898 -0.1446 0.3470 -0.57943 2009 3 9 54899 -0.1445 0.3502 -0.58088 2009 3 10 54900 -0.1443 0.3533 -0.58260 2009 3 11 54901 -0.1441 0.3565 -0.58444 2009 3 12 54902 -0.1438 0.3597 -0.58626 2009 3 13 54903 -0.1435 0.3628 -0.58793 2009 3 14 54904 -0.1431 0.3660 -0.58938 2009 3 15 54905 -0.1426 0.3691 -0.59054 2009 3 16 54906 -0.1422 0.3723 -0.59146 2009 3 17 54907 -0.1416 0.3754 -0.59222 2009 3 18 54908 -0.1410 0.3785 -0.59291 2009 3 19 54909 -0.1404 0.3816 -0.59355 2009 3 20 54910 -0.1397 0.3847 -0.59419 2009 3 21 54911 -0.1389 0.3878 -0.59495 2009 3 22 54912 -0.1381 0.3909 -0.59588 2009 3 23 54913 -0.1373 0.3940 -0.59705 2009 3 24 54914 -0.1364 0.3970 -0.59843 2009 3 25 54915 -0.1354 0.4001 -0.60000 2009 3 26 54916 -0.1344 0.4031 -0.60169 2009 3 27 54917 -0.1334 0.4061 -0.60339 2009 3 28 54918 -0.1323 0.4091 -0.60502 2009 3 29 54919 -0.1311 0.4121 -0.60651 2009 3 30 54920 -0.1299 0.4151 -0.60778 2009 3 31 54921 -0.1286 0.4180 -0.60885 2009 4 1 54922 -0.1273 0.4209 -0.60982 2009 4 2 54923 -0.1260 0.4238 -0.61080 2009 4 3 54924 -0.1246 0.4267 -0.61189 2009 4 4 54925 -0.1232 0.4296 -0.61325 2009 4 5 54926 -0.1217 0.4324 -0.61484 2009 4 6 54927 -0.1201 0.4352 -0.61664 2009 4 7 54928 -0.1185 0.4380 -0.61854 2009 4 8 54929 -0.1169 0.4408 -0.62050 2009 4 9 54930 -0.1152 0.4435 -0.62242 2009 4 10 54931 -0.1135 0.4463 -0.62417 2009 4 11 54932 -0.1118 0.4489 -0.62570 2009 4 12 54933 -0.1099 0.4516 -0.62704 2009 4 13 54934 -0.1081 0.4543 -0.62824 2009 4 14 54935 -0.1062 0.4569 -0.62931 2009 4 15 54936 -0.1043 0.4594 -0.63030 2009 4 16 54937 -0.1023 0.4620 -0.63132 2009 4 17 54938 -0.1003 0.4645 -0.63245 2009 4 18 54939 -0.0982 0.4670 -0.63370 2009 4 19 54940 -0.0961 0.4694 -0.63509 2009 4 20 54941 -0.0939 0.4719 -0.63662 2009 4 21 54942 -0.0918 0.4743 -0.63826 2009 4 22 54943 -0.0895 0.4766 -0.64000 2009 4 23 54944 -0.0873 0.4789 -0.64174 2009 4 24 54945 -0.0850 0.4812 -0.64342 2009 4 25 54946 -0.0826 0.4835 -0.64497 2009 4 26 54947 -0.0803 0.4857 -0.64629 2009 4 27 54948 -0.0779 0.4879 -0.64734 2009 4 28 54949 -0.0754 0.4900 -0.64821 2009 4 29 54950 -0.0730 0.4921 -0.64900 2009 4 30 54951 -0.0704 0.4942 -0.64982 2009 5 1 54952 -0.0679 0.4962 -0.65077 2009 5 2 54953 -0.0653 0.4982 -0.65195 2009 5 3 54954 -0.0627 0.5002 -0.65333 2009 5 4 54955 -0.0601 0.5021 -0.65486 2009 5 5 54956 -0.0574 0.5040 -0.65641 2009 5 6 54957 -0.0547 0.5058 -0.65785 2009 5 7 54958 -0.0520 0.5076 -0.65906 2009 5 8 54959 -0.0493 0.5093 -0.66004 2009 5 9 54960 -0.0465 0.5110 -0.66084 2009 5 10 54961 -0.0437 0.5127 -0.66148 2009 5 11 54962 -0.0408 0.5143 -0.66203 2009 5 12 54963 -0.0380 0.5159 -0.66247 2009 5 13 54964 -0.0351 0.5174 -0.66286 2009 5 14 54965 -0.0322 0.5189 -0.66332 2009 5 15 54966 -0.0293 0.5204 -0.66396 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) 54582 -55.78 .10 -8.54 .34 54583 -55.56 .18 -8.65 .34 54584 -55.33 .16 -8.55 .34 54585 -55.19 .20 -8.32 .34 54586 -55.27 .20 -8.23 .34 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 54582 0.300 0.040 -0.236 0.340 54583 0.318 0.072 -0.221 0.340 54584 0.315 0.064 -0.196 0.340 54585 0.298 0.080 -0.176 0.340 54586 0.279 0.080 -0.196 0.340 The IERS Conventions recommended software to predict celestial pole offsets is available at ftp://maia.usno.navy.mil/conventions/chapter5/ ceppred.f and software for the calculation of the dX and dY with respect to IAU2000A Nutation/Precession Theory can be found at the web site in section chapter 5.