********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 17 April 2008 Vol. XXI 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 = -0.4 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 4 11 54567 -.03891 .00009 .50863 .00009 -.374642 .000008 8 4 12 54568 -.03663 .00009 .51032 .00009 -.375176 .000011 8 4 13 54569 -.03420 .00009 .51179 .00009 -.375779 .000012 8 4 14 54570 -.03163 .00009 .51294 .00009 -.376587 .000012 8 4 15 54571 -.02906 .00009 .51379 .00009 -.377692 .000037 8 4 16 54572 -.02648 .00009 .51459 .00009 -.378964 .000048 8 4 17 54573 -.02366 .00009 .51557 .00009 -.380338 .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 = .0691 - .0706 cos A + .0765 sin A - .0152 cos C + .0954 sin C y = .3507 + .0686 cos A + .0698 sin A + .0954 cos C + .0152 sin C UT1-UTC = -.3465 - .00080 (MJD - 54581) - (UT2-UT1) where A = 2*pi*(MJD-54573)/365.25 and C = 2*pi*(MJD-54573)/435. TAI-UTC(MJD 54574) = 33.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-54573)**0.80 S t = 0.00025 (MJD-54573)**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 4 18 54574 -0.0209 0.5166 -0.38178 2008 4 19 54575 -0.0179 0.5179 -0.38313 2008 4 20 54576 -0.0150 0.5191 -0.38430 2008 4 21 54577 -0.0121 0.5203 -0.38531 2008 4 22 54578 -0.0091 0.5214 -0.38617 2008 4 23 54579 -0.0062 0.5226 -0.38689 2008 4 24 54580 -0.0032 0.5236 -0.38751 2008 4 25 54581 -0.0003 0.5247 -0.38808 2008 4 26 54582 0.0027 0.5257 -0.38862 2008 4 27 54583 0.0057 0.5266 -0.38921 2008 4 28 54584 0.0088 0.5276 -0.38987 2008 4 29 54585 0.0118 0.5284 -0.39072 2008 4 30 54586 0.0148 0.5293 -0.39178 2008 5 1 54587 0.0179 0.5300 -0.39303 2008 5 2 54588 0.0210 0.5308 -0.39441 2008 5 3 54589 0.0241 0.5315 -0.39584 2008 5 4 54590 0.0272 0.5321 -0.39721 2008 5 5 54591 0.0303 0.5327 -0.39839 2008 5 6 54592 0.0334 0.5333 -0.39928 2008 5 7 54593 0.0366 0.5338 -0.39989 2008 5 8 54594 0.0397 0.5342 -0.40031 2008 5 9 54595 0.0429 0.5346 -0.40070 2008 5 10 54596 0.0460 0.5350 -0.40118 2008 5 11 54597 0.0492 0.5353 -0.40186 2008 5 12 54598 0.0524 0.5356 -0.40273 2008 5 13 54599 0.0555 0.5358 -0.40373 2008 5 14 54600 0.0587 0.5359 -0.40479 2008 5 15 54601 0.0619 0.5361 -0.40581 2008 5 16 54602 0.0651 0.5361 -0.40673 2008 5 17 54603 0.0683 0.5361 -0.40749 2008 5 18 54604 0.0715 0.5361 -0.40805 2008 5 19 54605 0.0746 0.5360 -0.40840 2008 5 20 54606 0.0778 0.5359 -0.40854 2008 5 21 54607 0.0810 0.5358 -0.40852 2008 5 22 54608 0.0842 0.5355 -0.40839 2008 5 23 54609 0.0874 0.5353 -0.40824 2008 5 24 54610 0.0905 0.5350 -0.40812 2008 5 25 54611 0.0937 0.5346 -0.40812 2008 5 26 54612 0.0969 0.5342 -0.40829 2008 5 27 54613 0.1000 0.5337 -0.40867 2008 5 28 54614 0.1032 0.5332 -0.40926 2008 5 29 54615 0.1063 0.5327 -0.41003 2008 5 30 54616 0.1094 0.5321 -0.41092 2008 5 31 54617 0.1126 0.5314 -0.41180 2008 6 1 54618 0.1157 0.5307 -0.41254 2008 6 2 54619 0.1188 0.5300 -0.41304 2008 6 3 54620 0.1218 0.5292 -0.41327 2008 6 4 54621 0.1249 0.5283 -0.41328 2008 6 5 54622 0.1280 0.5275 -0.41320 2008 6 6 54623 0.1310 0.5265 -0.41318 2008 6 7 54624 0.1340 0.5255 -0.41334 2008 6 8 54625 0.1370 0.5245 -0.41371 2008 6 9 54626 0.1400 0.5234 -0.41427 2008 6 10 54627 0.1430 0.5223 -0.41494 2008 6 11 54628 0.1460 0.5212 -0.41562 2008 6 12 54629 0.1489 0.5200 -0.41621 2008 6 13 54630 0.1518 0.5187 -0.41665 2008 6 14 54631 0.1547 0.5174 -0.41691 2008 6 15 54632 0.1576 0.5161 -0.41696 2008 6 16 54633 0.1604 0.5147 -0.41683 2008 6 17 54634 0.1632 0.5133 -0.41653 2008 6 18 54635 0.1660 0.5118 -0.41612 2008 6 19 54636 0.1688 0.5103 -0.41569 2008 6 20 54637 0.1716 0.5087 -0.41531 2008 6 21 54638 0.1743 0.5072 -0.41504 2008 6 22 54639 0.1770 0.5055 -0.41493 2008 6 23 54640 0.1796 0.5038 -0.41502 2008 6 24 54641 0.1823 0.5021 -0.41530 2008 6 25 54642 0.1849 0.5004 -0.41575 2008 6 26 54643 0.1875 0.4986 -0.41630 2008 6 27 54644 0.1900 0.4967 -0.41686 2008 6 28 54645 0.1925 0.4949 -0.41732 2008 6 29 54646 0.1950 0.4929 -0.41757 2008 6 30 54647 0.1975 0.4910 -0.41756 2008 7 1 54648 0.1999 0.4890 -0.41731 2008 7 2 54649 0.2023 0.4870 -0.41692 2008 7 3 54650 0.2046 0.4849 -0.41653 2008 7 4 54651 0.2070 0.4828 -0.41627 2008 7 5 54652 0.2092 0.4807 -0.41623 2008 7 6 54653 0.2115 0.4785 -0.41641 2008 7 7 54654 0.2137 0.4763 -0.41676 2008 7 8 54655 0.2159 0.4741 -0.41716 2008 7 9 54656 0.2180 0.4718 -0.41752 2008 7 10 54657 0.2201 0.4695 -0.41774 2008 7 11 54658 0.2221 0.4672 -0.41778 2008 7 12 54659 0.2242 0.4648 -0.41764 2008 7 13 54660 0.2261 0.4624 -0.41730 2008 7 14 54661 0.2281 0.4600 -0.41680 2008 7 15 54662 0.2300 0.4575 -0.41618 2008 7 16 54663 0.2318 0.4550 -0.41552 2008 7 17 54664 0.2336 0.4525 -0.41488 2008 7 18 54665 0.2354 0.4500 -0.41434 2008 7 19 54666 0.2371 0.4474 -0.41397 2008 7 20 54667 0.2388 0.4448 -0.41379 2008 7 21 54668 0.2404 0.4422 -0.41383 2008 7 22 54669 0.2420 0.4395 -0.41404 2008 7 23 54670 0.2435 0.4369 -0.41436 2008 7 24 54671 0.2450 0.4342 -0.41470 2008 7 25 54672 0.2465 0.4314 -0.41497 2008 7 26 54673 0.2479 0.4287 -0.41506 2008 7 27 54674 0.2493 0.4259 -0.41492 2008 7 28 54675 0.2506 0.4232 -0.41457 2008 7 29 54676 0.2518 0.4204 -0.41406 2008 7 30 54677 0.2531 0.4175 -0.41353 2008 7 31 54678 0.2542 0.4147 -0.41310 2008 8 1 54679 0.2554 0.4118 -0.41289 2008 8 2 54680 0.2564 0.4090 -0.41293 2008 8 3 54681 0.2574 0.4061 -0.41318 2008 8 4 54682 0.2584 0.4032 -0.41354 2008 8 5 54683 0.2593 0.4002 -0.41390 2008 8 6 54684 0.2602 0.3973 -0.41417 2008 8 7 54685 0.2610 0.3943 -0.41427 2008 8 8 54686 0.2618 0.3914 -0.41417 2008 8 9 54687 0.2625 0.3884 -0.41388 2008 8 10 54688 0.2632 0.3854 -0.41343 2008 8 11 54689 0.2638 0.3824 -0.41285 2008 8 12 54690 0.2644 0.3794 -0.41223 2008 8 13 54691 0.2649 0.3764 -0.41163 2008 8 14 54692 0.2654 0.3734 -0.41113 2008 8 15 54693 0.2658 0.3703 -0.41080 2008 8 16 54694 0.2662 0.3673 -0.41070 2008 8 17 54695 0.2665 0.3643 -0.41084 2008 8 18 54696 0.2668 0.3612 -0.41120 2008 8 19 54697 0.2670 0.3582 -0.41173 2008 8 20 54698 0.2671 0.3551 -0.41231 2008 8 21 54699 0.2672 0.3520 -0.41285 2008 8 22 54700 0.2673 0.3490 -0.41323 2008 8 23 54701 0.2673 0.3459 -0.41340 2008 8 24 54702 0.2673 0.3429 -0.41336 2008 8 25 54703 0.2672 0.3398 -0.41316 2008 8 26 54704 0.2670 0.3367 -0.41292 2008 8 27 54705 0.2668 0.3337 -0.41275 2008 8 28 54706 0.2666 0.3306 -0.41277 2008 8 29 54707 0.2663 0.3276 -0.41304 2008 8 30 54708 0.2659 0.3245 -0.41357 2008 8 31 54709 0.2655 0.3215 -0.41428 2008 9 1 54710 0.2650 0.3184 -0.41507 2008 9 2 54711 0.2645 0.3154 -0.41582 2008 9 3 54712 0.2639 0.3124 -0.41644 2008 9 4 54713 0.2633 0.3094 -0.41688 2008 9 5 54714 0.2627 0.3064 -0.41712 2008 9 6 54715 0.2620 0.3034 -0.41718 2008 9 7 54716 0.2612 0.3004 -0.41711 2008 9 8 54717 0.2604 0.2974 -0.41697 2008 9 9 54718 0.2595 0.2945 -0.41684 2008 9 10 54719 0.2586 0.2915 -0.41678 2008 9 11 54720 0.2576 0.2886 -0.41688 2008 9 12 54721 0.2566 0.2857 -0.41718 2008 9 13 54722 0.2555 0.2827 -0.41774 2008 9 14 54723 0.2544 0.2799 -0.41854 2008 9 15 54724 0.2533 0.2770 -0.41954 2008 9 16 54725 0.2520 0.2741 -0.42066 2008 9 17 54726 0.2508 0.2713 -0.42177 2008 9 18 54727 0.2495 0.2685 -0.42275 2008 9 19 54728 0.2481 0.2657 -0.42351 2008 9 20 54729 0.2467 0.2629 -0.42405 2008 9 21 54730 0.2453 0.2602 -0.42439 2008 9 22 54731 0.2438 0.2574 -0.42465 2008 9 23 54732 0.2422 0.2547 -0.42495 2008 9 24 54733 0.2407 0.2520 -0.42540 2008 9 25 54734 0.2390 0.2494 -0.42608 2008 9 26 54735 0.2373 0.2467 -0.42701 2008 9 27 54736 0.2356 0.2441 -0.42813 2008 9 28 54737 0.2339 0.2415 -0.42936 2008 9 29 54738 0.2321 0.2390 -0.43061 2008 9 30 54739 0.2302 0.2364 -0.43176 2008 10 1 54740 0.2283 0.2339 -0.43276 2008 10 2 54741 0.2264 0.2315 -0.43355 2008 10 3 54742 0.2244 0.2290 -0.43416 2008 10 4 54743 0.2224 0.2266 -0.43461 2008 10 5 54744 0.2203 0.2242 -0.43497 2008 10 6 54745 0.2182 0.2219 -0.43530 2008 10 7 54746 0.2161 0.2195 -0.43568 2008 10 8 54747 0.2139 0.2172 -0.43617 2008 10 9 54748 0.2117 0.2150 -0.43684 2008 10 10 54749 0.2094 0.2128 -0.43774 2008 10 11 54750 0.2072 0.2106 -0.43888 2008 10 12 54751 0.2048 0.2084 -0.44024 2008 10 13 54752 0.2025 0.2063 -0.44177 2008 10 14 54753 0.2001 0.2042 -0.44334 2008 10 15 54754 0.1976 0.2022 -0.44484 2008 10 16 54755 0.1952 0.2001 -0.44614 2008 10 17 54756 0.1927 0.1982 -0.44720 2008 10 18 54757 0.1902 0.1962 -0.44803 2008 10 19 54758 0.1876 0.1943 -0.44872 2008 10 20 54759 0.1850 0.1925 -0.44940 2008 10 21 54760 0.1824 0.1907 -0.45019 2008 10 22 54761 0.1797 0.1889 -0.45117 2008 10 23 54762 0.1770 0.1872 -0.45237 2008 10 24 54763 0.1743 0.1855 -0.45373 2008 10 25 54764 0.1716 0.1838 -0.45517 2008 10 26 54765 0.1688 0.1822 -0.45661 2008 10 27 54766 0.1660 0.1806 -0.45794 2008 10 28 54767 0.1632 0.1791 -0.45908 2008 10 29 54768 0.1604 0.1776 -0.45999 2008 10 30 54769 0.1575 0.1762 -0.46066 2008 10 31 54770 0.1546 0.1748 -0.46110 2008 11 1 54771 0.1517 0.1734 -0.46138 2008 11 2 54772 0.1488 0.1721 -0.46158 2008 11 3 54773 0.1458 0.1708 -0.46178 2008 11 4 54774 0.1428 0.1696 -0.46208 2008 11 5 54775 0.1398 0.1684 -0.46253 2008 11 6 54776 0.1368 0.1673 -0.46320 2008 11 7 54777 0.1338 0.1662 -0.46409 2008 11 8 54778 0.1307 0.1652 -0.46521 2008 11 9 54779 0.1276 0.1642 -0.46650 2008 11 10 54780 0.1246 0.1632 -0.46789 2008 11 11 54781 0.1215 0.1623 -0.46925 2008 11 12 54782 0.1184 0.1615 -0.47047 2008 11 13 54783 0.1152 0.1607 -0.47146 2008 11 14 54784 0.1121 0.1599 -0.47222 2008 11 15 54785 0.1089 0.1592 -0.47282 2008 11 16 54786 0.1058 0.1586 -0.47340 2008 11 17 54787 0.1026 0.1579 -0.47411 2008 11 18 54788 0.0994 0.1574 -0.47503 2008 11 19 54789 0.0962 0.1569 -0.47620 2008 11 20 54790 0.0930 0.1564 -0.47755 2008 11 21 54791 0.0898 0.1560 -0.47901 2008 11 22 54792 0.0866 0.1556 -0.48046 2008 11 23 54793 0.0834 0.1553 -0.48185 2008 11 24 54794 0.0802 0.1550 -0.48307 2008 11 25 54795 0.0770 0.1548 -0.48405 2008 11 26 54796 0.0737 0.1546 -0.48482 2008 11 27 54797 0.0705 0.1545 -0.48544 2008 11 28 54798 0.0673 0.1544 -0.48594 2008 11 29 54799 0.0641 0.1544 -0.48637 2008 11 30 54800 0.0608 0.1544 -0.48675 2008 12 1 54801 0.0576 0.1545 -0.48719 2008 12 2 54802 0.0544 0.1546 -0.48778 2008 12 3 54803 0.0512 0.1548 -0.48850 2008 12 4 54804 0.0480 0.1550 -0.48940 2008 12 5 54805 0.0448 0.1553 -0.49047 2008 12 6 54806 0.0415 0.1556 -0.49169 2008 12 7 54807 0.0384 0.1560 -0.49301 2008 12 8 54808 0.0352 0.1564 -0.49428 2008 12 9 54809 0.0320 0.1568 -0.49548 2008 12 10 54810 0.0288 0.1574 -0.49655 2008 12 11 54811 0.0257 0.1579 -0.49738 2008 12 12 54812 0.0225 0.1585 -0.49800 2008 12 13 54813 0.0194 0.1592 -0.49851 2008 12 14 54814 0.0162 0.1599 -0.49906 2008 12 15 54815 0.0131 0.1606 -0.49976 2008 12 16 54816 0.0100 0.1614 -0.50071 2008 12 17 54817 0.0069 0.1623 -0.50187 2008 12 18 54818 0.0039 0.1632 -0.50314 2008 12 19 54819 0.0008 0.1641 -0.50438 2008 12 20 54820 -0.0022 0.1651 -0.50542 2008 12 21 54821 -0.0052 0.1662 -0.50622 2008 12 22 54822 -0.0082 0.1672 -0.50678 2008 12 23 54823 -0.0112 0.1684 -0.50709 2008 12 24 54824 -0.0142 0.1695 -0.50722 2008 12 25 54825 -0.0171 0.1708 -0.50722 2008 12 26 54826 -0.0200 0.1720 -0.50714 2008 12 27 54827 -0.0229 0.1733 -0.50707 2008 12 28 54828 -0.0258 0.1747 -0.50712 2008 12 29 54829 -0.0286 0.1761 -0.50733 2008 12 30 54830 -0.0314 0.1775 -0.50772 2008 12 31 54831 -0.0342 0.1790 -0.50829 2009 1 1 54832 -0.0370 0.1805 -0.50900 2009 1 2 54833 -0.0397 0.1821 -0.50981 2009 1 3 54834 -0.0425 0.1837 -0.51064 2009 1 4 54835 -0.0451 0.1853 -0.51152 2009 1 5 54836 -0.0478 0.1870 -0.51236 2009 1 6 54837 -0.0504 0.1888 -0.51310 2009 1 7 54838 -0.0530 0.1905 -0.51371 2009 1 8 54839 -0.0556 0.1923 -0.51413 2009 1 9 54840 -0.0581 0.1942 -0.51441 2009 1 10 54841 -0.0606 0.1961 -0.51471 2009 1 11 54842 -0.0631 0.1980 -0.51521 2009 1 12 54843 -0.0655 0.2000 -0.51599 2009 1 13 54844 -0.0679 0.2020 -0.51707 2009 1 14 54845 -0.0703 0.2040 -0.51838 2009 1 15 54846 -0.0726 0.2061 -0.51977 2009 1 16 54847 -0.0749 0.2082 -0.52111 2009 1 17 54848 -0.0771 0.2103 -0.52231 2009 1 18 54849 -0.0793 0.2125 -0.52324 2009 1 19 54850 -0.0815 0.2147 -0.52391 2009 1 20 54851 -0.0837 0.2170 -0.52440 2009 1 21 54852 -0.0858 0.2193 -0.52473 2009 1 22 54853 -0.0878 0.2216 -0.52493 2009 1 23 54854 -0.0899 0.2239 -0.52505 2009 1 24 54855 -0.0918 0.2263 -0.52519 2009 1 25 54856 -0.0938 0.2287 -0.52543 2009 1 26 54857 -0.0957 0.2311 -0.52588 2009 1 27 54858 -0.0975 0.2336 -0.52654 2009 1 28 54859 -0.0993 0.2361 -0.52741 2009 1 29 54860 -0.1011 0.2386 -0.52846 2009 1 30 54861 -0.1028 0.2412 -0.52964 2009 1 31 54862 -0.1045 0.2437 -0.53089 2009 2 1 54863 -0.1062 0.2463 -0.53212 2009 2 2 54864 -0.1077 0.2489 -0.53324 2009 2 3 54865 -0.1093 0.2516 -0.53418 2009 2 4 54866 -0.1108 0.2543 -0.53495 2009 2 5 54867 -0.1123 0.2570 -0.53559 2009 2 6 54868 -0.1137 0.2597 -0.53620 2009 2 7 54869 -0.1150 0.2624 -0.53696 2009 2 8 54870 -0.1163 0.2652 -0.53792 2009 2 9 54871 -0.1176 0.2680 -0.53916 2009 2 10 54872 -0.1188 0.2708 -0.54061 2009 2 11 54873 -0.1200 0.2736 -0.54229 2009 2 12 54874 -0.1211 0.2764 -0.54407 2009 2 13 54875 -0.1222 0.2793 -0.54576 2009 2 14 54876 -0.1232 0.2821 -0.54729 2009 2 15 54877 -0.1242 0.2850 -0.54862 2009 2 16 54878 -0.1251 0.2879 -0.54978 2009 2 17 54879 -0.1260 0.2908 -0.55076 2009 2 18 54880 -0.1268 0.2938 -0.55159 2009 2 19 54881 -0.1276 0.2967 -0.55237 2009 2 20 54882 -0.1284 0.2996 -0.55320 2009 2 21 54883 -0.1290 0.3026 -0.55409 2009 2 22 54884 -0.1297 0.3056 -0.55511 2009 2 23 54885 -0.1302 0.3086 -0.55627 2009 2 24 54886 -0.1308 0.3116 -0.55760 2009 2 25 54887 -0.1313 0.3146 -0.55909 2009 2 26 54888 -0.1317 0.3176 -0.56068 2009 2 27 54889 -0.1321 0.3206 -0.56234 2009 2 28 54890 -0.1324 0.3236 -0.56399 2009 3 1 54891 -0.1327 0.3266 -0.56552 2009 3 2 54892 -0.1329 0.3297 -0.56684 2009 3 3 54893 -0.1330 0.3327 -0.56793 2009 3 4 54894 -0.1332 0.3357 -0.56885 2009 3 5 54895 -0.1332 0.3388 -0.56965 2009 3 6 54896 -0.1332 0.3418 -0.57046 2009 3 7 54897 -0.1332 0.3448 -0.57144 2009 3 8 54898 -0.1331 0.3479 -0.57268 2009 3 9 54899 -0.1330 0.3509 -0.57421 2009 3 10 54900 -0.1328 0.3539 -0.57597 2009 3 11 54901 -0.1326 0.3570 -0.57780 2009 3 12 54902 -0.1323 0.3600 -0.57955 2009 3 13 54903 -0.1319 0.3630 -0.58115 2009 3 14 54904 -0.1315 0.3661 -0.58259 2009 3 15 54905 -0.1311 0.3691 -0.58385 2009 3 16 54906 -0.1306 0.3721 -0.58495 2009 3 17 54907 -0.1301 0.3751 -0.58589 2009 3 18 54908 -0.1295 0.3781 -0.58669 2009 3 19 54909 -0.1288 0.3810 -0.58749 2009 3 20 54910 -0.1281 0.3840 -0.58842 2009 3 21 54911 -0.1274 0.3870 -0.58954 2009 3 22 54912 -0.1266 0.3899 -0.59084 2009 3 23 54913 -0.1257 0.3929 -0.59231 2009 3 24 54914 -0.1248 0.3958 -0.59396 2009 3 25 54915 -0.1239 0.3987 -0.59577 2009 3 26 54916 -0.1229 0.4016 -0.59768 2009 3 27 54917 -0.1219 0.4045 -0.59961 2009 3 28 54918 -0.1208 0.4073 -0.60145 2009 3 29 54919 -0.1197 0.4102 -0.60304 2009 3 30 54920 -0.1185 0.4130 -0.60441 2009 3 31 54921 -0.1173 0.4158 -0.60567 2009 4 1 54922 -0.1160 0.4186 -0.60697 2009 4 2 54923 -0.1147 0.4214 -0.60829 2009 4 3 54924 -0.1133 0.4242 -0.60971 2009 4 4 54925 -0.1119 0.4269 -0.61132 2009 4 5 54926 -0.1104 0.4296 -0.61315 2009 4 6 54927 -0.1089 0.4323 -0.61522 2009 4 7 54928 -0.1074 0.4350 -0.61745 2009 4 8 54929 -0.1058 0.4376 -0.61969 2009 4 9 54930 -0.1042 0.4402 -0.62179 2009 4 10 54931 -0.1025 0.4428 -0.62357 2009 4 11 54932 -0.1008 0.4454 -0.62504 2009 4 12 54933 -0.0990 0.4479 -0.62623 2009 4 13 54934 -0.0972 0.4505 -0.62721 2009 4 14 54935 -0.0954 0.4530 -0.62799 2009 4 15 54936 -0.0935 0.4554 -0.62873 2009 4 16 54937 -0.0916 0.4578 -0.62954 2009 4 17 54938 -0.0896 0.4602 -0.63044 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) 54554 -56.84 .74 -7.12 .11 54555 -56.45 .26 -7.36 .34 54556 -56.17 .26 -7.38 .34 54557 -56.14 .35 -7.27 .11 54558 -56.35 .28 -7.23 .34 54559 -56.55 .28 -7.25 .34 54560 -56.51 .28 -7.12 .34 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 54554 0.276 0.294 -0.127 0.110 54555 0.306 0.103 -0.106 0.340 54556 0.318 0.103 -0.066 0.340 54557 0.311 0.139 -0.031 0.110 54558 0.298 0.111 -0.022 0.340 54559 0.284 0.111 -0.016 0.340 54560 0.269 0.111 -0.013 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.