********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 8 April 2010 Vol. XXIII No. 014 ______________________________________________________________________ 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 = +0.0 seconds beginning 11 March 2010 at 0000 UTC Beginning 1 January 2009: TAI-UTC(BIPM) = 34.000 000 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 10 4 2 55288 -.06155 .00009 0.32195 .00009 0.014554 0.000012 10 4 3 55289 -.06211 .00009 0.32462 .00009 0.013645 0.000012 10 4 4 55290 -.06292 .00009 0.32719 .00009 0.012854 0.000010 10 4 5 55291 -.06420 .00010 0.32943 .00009 0.012061 0.000009 10 4 6 55292 -.06579 .00010 0.33126 .00009 0.011197 0.000009 10 4 7 55293 -.06707 .00009 0.33293 .00009 0.010225 0.000009 10 4 8 55294 -.06783 .00009 0.33484 .00009 0.009110 0.000055 _______________________________________________________________________ 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 = 0.0819 - 0.0884 cos A + 0.0886 sin A - 0.0571 cos C - 0.0889 sin C y = 0.3456 + 0.0797 cos A + 0.0794 sin A - 0.0889 cos C + 0.0571 sin C UT1-UTC = 0.0331 - 0.00087 (MJD - 55302) - (UT2-UT1) where A = 2*pi*(MJD-55294)/365.25 and C = 2*pi*(MJD-55294)/435. TAI-UTC(MJD 55295) = 34.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-55294)**0.80 S t = 0.00025 (MJD-55294)**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) 2010 4 9 55295 -0.0683 0.3367 0.00785 2010 4 10 55296 -0.0684 0.3389 0.00646 2010 4 11 55297 -0.0684 0.3411 0.00499 2010 4 12 55298 -0.0683 0.3433 0.00346 2010 4 13 55299 -0.0680 0.3456 0.00193 2010 4 14 55300 -0.0678 0.3479 0.00043 2010 4 15 55301 -0.0675 0.3502 -0.00099 2010 4 16 55302 -0.0671 0.3526 -0.00226 2010 4 17 55303 -0.0668 0.3549 -0.00337 2010 4 18 55304 -0.0663 0.3572 -0.00434 2010 4 19 55305 -0.0659 0.3595 -0.00522 2010 4 20 55306 -0.0654 0.3617 -0.00614 2010 4 21 55307 -0.0649 0.3640 -0.00717 2010 4 22 55308 -0.0643 0.3663 -0.00840 2010 4 23 55309 -0.0637 0.3685 -0.00982 2010 4 24 55310 -0.0631 0.3708 -0.01142 2010 4 25 55311 -0.0624 0.3730 -0.01316 2010 4 26 55312 -0.0617 0.3752 -0.01489 2010 4 27 55313 -0.0610 0.3774 -0.01645 2010 4 28 55314 -0.0602 0.3796 -0.01773 2010 4 29 55315 -0.0594 0.3818 -0.01872 2010 4 30 55316 -0.0586 0.3840 -0.01945 2010 5 1 55317 -0.0577 0.3861 -0.02000 2010 5 2 55318 -0.0568 0.3883 -0.02045 2010 5 3 55319 -0.0558 0.3904 -0.02088 2010 5 4 55320 -0.0548 0.3925 -0.02137 2010 5 5 55321 -0.0538 0.3946 -0.02197 2010 5 6 55322 -0.0527 0.3967 -0.02271 2010 5 7 55323 -0.0517 0.3987 -0.02359 2010 5 8 55324 -0.0505 0.4008 -0.02457 2010 5 9 55325 -0.0494 0.4028 -0.02563 2010 5 10 55326 -0.0482 0.4048 -0.02672 2010 5 11 55327 -0.0470 0.4068 -0.02778 2010 5 12 55328 -0.0458 0.4088 -0.02875 2010 5 13 55329 -0.0445 0.4107 -0.02960 2010 5 14 55330 -0.0432 0.4126 -0.03031 2010 5 15 55331 -0.0418 0.4145 -0.03090 2010 5 16 55332 -0.0405 0.4164 -0.03142 2010 5 17 55333 -0.0391 0.4183 -0.03194 2010 5 18 55334 -0.0377 0.4201 -0.03257 2010 5 19 55335 -0.0362 0.4219 -0.03337 2010 5 20 55336 -0.0347 0.4237 -0.03438 2010 5 21 55337 -0.0332 0.4255 -0.03559 2010 5 22 55338 -0.0317 0.4272 -0.03692 2010 5 23 55339 -0.0302 0.4289 -0.03827 2010 5 24 55340 -0.0286 0.4306 -0.03952 2010 5 25 55341 -0.0270 0.4323 -0.04057 2010 5 26 55342 -0.0253 0.4339 -0.04138 2010 5 27 55343 -0.0237 0.4355 -0.04194 2010 5 28 55344 -0.0220 0.4371 -0.04231 2010 5 29 55345 -0.0203 0.4387 -0.04255 2010 5 30 55346 -0.0186 0.4402 -0.04274 2010 5 31 55347 -0.0168 0.4417 -0.04297 2010 6 1 55348 -0.0151 0.4432 -0.04328 2010 6 2 55349 -0.0133 0.4446 -0.04368 2010 6 3 55350 -0.0114 0.4460 -0.04419 2010 6 4 55351 -0.0096 0.4474 -0.04478 2010 6 5 55352 -0.0078 0.4488 -0.04544 2010 6 6 55353 -0.0059 0.4501 -0.04610 2010 6 7 55354 -0.0040 0.4514 -0.04673 2010 6 8 55355 -0.0021 0.4527 -0.04725 2010 6 9 55356 -0.0002 0.4539 -0.04765 2010 6 10 55357 0.0018 0.4552 -0.04789 2010 6 11 55358 0.0037 0.4563 -0.04799 2010 6 12 55359 0.0057 0.4575 -0.04798 2010 6 13 55360 0.0077 0.4586 -0.04796 2010 6 14 55361 0.0097 0.4597 -0.04803 2010 6 15 55362 0.0117 0.4607 -0.04828 2010 6 16 55363 0.0137 0.4618 -0.04875 2010 6 17 55364 0.0158 0.4628 -0.04943 2010 6 18 55365 0.0178 0.4637 -0.05023 2010 6 19 55366 0.0199 0.4646 -0.05104 2010 6 20 55367 0.0220 0.4655 -0.05174 2010 6 21 55368 0.0240 0.4664 -0.05224 2010 6 22 55369 0.0261 0.4672 -0.05251 2010 6 23 55370 0.0282 0.4680 -0.05254 2010 6 24 55371 0.0304 0.4688 -0.05237 2010 6 25 55372 0.0325 0.4695 -0.05208 2010 6 26 55373 0.0346 0.4702 -0.05173 2010 6 27 55374 0.0367 0.4709 -0.05140 2010 6 28 55375 0.0389 0.4715 -0.05114 2010 6 29 55376 0.0410 0.4721 -0.05100 2010 6 30 55377 0.0432 0.4727 -0.05096 2010 7 1 55378 0.0453 0.4732 -0.05103 2010 7 2 55379 0.0475 0.4737 -0.05116 2010 7 3 55380 0.0497 0.4742 -0.05132 2010 7 4 55381 0.0518 0.4746 -0.05145 2010 7 5 55382 0.0540 0.4750 -0.05151 2010 7 6 55383 0.0562 0.4753 -0.05147 2010 7 7 55384 0.0584 0.4757 -0.05129 2010 7 8 55385 0.0605 0.4759 -0.05098 2010 7 9 55386 0.0627 0.4762 -0.05055 2010 7 10 55387 0.0649 0.4764 -0.05008 2010 7 11 55388 0.0670 0.4766 -0.04967 2010 7 12 55389 0.0692 0.4768 -0.04942 2010 7 13 55390 0.0714 0.4769 -0.04941 2010 7 14 55391 0.0735 0.4770 -0.04966 2010 7 15 55392 0.0757 0.4770 -0.05009 2010 7 16 55393 0.0779 0.4771 -0.05060 2010 7 17 55394 0.0800 0.4770 -0.05102 2010 7 18 55395 0.0822 0.4770 -0.05126 2010 7 19 55396 0.0843 0.4769 -0.05126 2010 7 20 55397 0.0864 0.4768 -0.05101 2010 7 21 55398 0.0886 0.4767 -0.05057 2010 7 22 55399 0.0907 0.4765 -0.04999 2010 7 23 55400 0.0928 0.4763 -0.04936 2010 7 24 55401 0.0949 0.4760 -0.04876 2010 7 25 55402 0.0970 0.4757 -0.04823 2010 7 26 55403 0.0991 0.4754 -0.04785 2010 7 27 55404 0.1011 0.4751 -0.04760 2010 7 28 55405 0.1032 0.4747 -0.04748 2010 7 29 55406 0.1052 0.4743 -0.04746 2010 7 30 55407 0.1073 0.4739 -0.04749 2010 7 31 55408 0.1093 0.4734 -0.04754 2010 8 1 55409 0.1113 0.4729 -0.04755 2010 8 2 55410 0.1133 0.4724 -0.04748 2010 8 3 55411 0.1153 0.4718 -0.04730 2010 8 4 55412 0.1173 0.4712 -0.04700 2010 8 5 55413 0.1192 0.4706 -0.04661 2010 8 6 55414 0.1211 0.4700 -0.04617 2010 8 7 55415 0.1231 0.4693 -0.04576 2010 8 8 55416 0.1250 0.4686 -0.04550 2010 8 9 55417 0.1269 0.4678 -0.04548 2010 8 10 55418 0.1287 0.4671 -0.04575 2010 8 11 55419 0.1306 0.4663 -0.04629 2010 8 12 55420 0.1324 0.4654 -0.04699 2010 8 13 55421 0.1343 0.4646 -0.04771 2010 8 14 55422 0.1360 0.4637 -0.04829 2010 8 15 55423 0.1378 0.4628 -0.04863 2010 8 16 55424 0.1396 0.4619 -0.04872 2010 8 17 55425 0.1413 0.4609 -0.04858 2010 8 18 55426 0.1430 0.4599 -0.04830 2010 8 19 55427 0.1447 0.4589 -0.04796 2010 8 20 55428 0.1464 0.4579 -0.04763 2010 8 21 55429 0.1481 0.4568 -0.04738 2010 8 22 55430 0.1497 0.4557 -0.04725 2010 8 23 55431 0.1513 0.4546 -0.04727 2010 8 24 55432 0.1529 0.4535 -0.04744 2010 8 25 55433 0.1545 0.4523 -0.04773 2010 8 26 55434 0.1560 0.4511 -0.04810 2010 8 27 55435 0.1575 0.4499 -0.04851 2010 8 28 55436 0.1590 0.4487 -0.04891 2010 8 29 55437 0.1605 0.4474 -0.04924 2010 8 30 55438 0.1619 0.4461 -0.04948 2010 8 31 55439 0.1633 0.4449 -0.04961 2010 9 1 55440 0.1647 0.4435 -0.04965 2010 9 2 55441 0.1661 0.4422 -0.04964 2010 9 3 55442 0.1674 0.4408 -0.04963 2010 9 4 55443 0.1687 0.4395 -0.04973 2010 9 5 55444 0.1700 0.4381 -0.05003 2010 9 6 55445 0.1712 0.4366 -0.05062 2010 9 7 55446 0.1725 0.4352 -0.05151 2010 9 8 55447 0.1737 0.4338 -0.05264 2010 9 9 55448 0.1748 0.4323 -0.05388 2010 9 10 55449 0.1760 0.4308 -0.05507 2010 9 11 55450 0.1771 0.4293 -0.05608 2010 9 12 55451 0.1782 0.4278 -0.05683 2010 9 13 55452 0.1792 0.4262 -0.05733 2010 9 14 55453 0.1802 0.4247 -0.05763 2010 9 15 55454 0.1812 0.4231 -0.05783 2010 9 16 55455 0.1822 0.4215 -0.05802 2010 9 17 55456 0.1832 0.4199 -0.05827 2010 9 18 55457 0.1841 0.4183 -0.05863 2010 9 19 55458 0.1849 0.4167 -0.05913 2010 9 20 55459 0.1858 0.4151 -0.05976 2010 9 21 55460 0.1866 0.4134 -0.06052 2010 9 22 55461 0.1874 0.4118 -0.06137 2010 9 23 55462 0.1882 0.4101 -0.06227 2010 9 24 55463 0.1889 0.4084 -0.06316 2010 9 25 55464 0.1896 0.4067 -0.06400 2010 9 26 55465 0.1902 0.4051 -0.06474 2010 9 27 55466 0.1909 0.4033 -0.06538 2010 9 28 55467 0.1915 0.4016 -0.06590 2010 9 29 55468 0.1920 0.3999 -0.06635 2010 9 30 55469 0.1926 0.3982 -0.06678 2010 10 1 55470 0.1931 0.3964 -0.06727 2010 10 2 55471 0.1936 0.3947 -0.06790 2010 10 3 55472 0.1940 0.3929 -0.06876 2010 10 4 55473 0.1944 0.3912 -0.06989 2010 10 5 55474 0.1948 0.3894 -0.07127 2010 10 6 55475 0.1952 0.3877 -0.07281 2010 10 7 55476 0.1955 0.3859 -0.07437 2010 10 8 55477 0.1958 0.3841 -0.07580 2010 10 9 55478 0.1961 0.3823 -0.07698 2010 10 10 55479 0.1963 0.3806 -0.07787 2010 10 11 55480 0.1965 0.3788 -0.07849 2010 10 12 55481 0.1966 0.3770 -0.07893 2010 10 13 55482 0.1968 0.3752 -0.07927 2010 10 14 55483 0.1969 0.3734 -0.07960 2010 10 15 55484 0.1970 0.3716 -0.07999 2010 10 16 55485 0.1970 0.3699 -0.08047 2010 10 17 55486 0.1970 0.3681 -0.08106 2010 10 18 55487 0.1970 0.3663 -0.08176 2010 10 19 55488 0.1969 0.3645 -0.08256 2010 10 20 55489 0.1969 0.3627 -0.08343 2010 10 21 55490 0.1968 0.3609 -0.08432 2010 10 22 55491 0.1966 0.3592 -0.08519 2010 10 23 55492 0.1964 0.3574 -0.08600 2010 10 24 55493 0.1962 0.3556 -0.08673 2010 10 25 55494 0.1960 0.3539 -0.08737 2010 10 26 55495 0.1958 0.3521 -0.08794 2010 10 27 55496 0.1955 0.3504 -0.08848 2010 10 28 55497 0.1951 0.3486 -0.08907 2010 10 29 55498 0.1948 0.3469 -0.08979 2010 10 30 55499 0.1944 0.3452 -0.09072 2010 10 31 55500 0.1940 0.3434 -0.09191 2010 11 1 55501 0.1936 0.3417 -0.09334 2010 11 2 55502 0.1931 0.3400 -0.09495 2010 11 3 55503 0.1926 0.3383 -0.09662 2010 11 4 55504 0.1921 0.3366 -0.09823 2010 11 5 55505 0.1916 0.3349 -0.09966 2010 11 6 55506 0.1910 0.3333 -0.10083 2010 11 7 55507 0.1904 0.3316 -0.10177 2010 11 8 55508 0.1898 0.3299 -0.10252 2010 11 9 55509 0.1891 0.3283 -0.10318 2010 11 10 55510 0.1884 0.3267 -0.10383 2010 11 11 55511 0.1877 0.3251 -0.10456 2010 11 12 55512 0.1870 0.3235 -0.10538 2010 11 13 55513 0.1862 0.3219 -0.10632 2010 11 14 55514 0.1855 0.3203 -0.10735 2010 11 15 55515 0.1847 0.3187 -0.10847 2010 11 16 55516 0.1838 0.3172 -0.10966 2010 11 17 55517 0.1830 0.3156 -0.11088 2010 11 18 55518 0.1821 0.3141 -0.11206 2010 11 19 55519 0.1812 0.3126 -0.11314 2010 11 20 55520 0.1803 0.3111 -0.11410 2010 11 21 55521 0.1793 0.3096 -0.11496 2010 11 22 55522 0.1783 0.3082 -0.11574 2010 11 23 55523 0.1774 0.3067 -0.11647 2010 11 24 55524 0.1763 0.3053 -0.11721 2010 11 25 55525 0.1753 0.3039 -0.11806 2010 11 26 55526 0.1742 0.3025 -0.11904 2010 11 27 55527 0.1732 0.3011 -0.12022 2010 11 28 55528 0.1721 0.2998 -0.12160 2010 11 29 55529 0.1710 0.2985 -0.12315 2010 11 30 55530 0.1698 0.2971 -0.12478 2010 12 1 55531 0.1687 0.2958 -0.12642 2010 12 2 55532 0.1675 0.2946 -0.12796 2010 12 3 55533 0.1663 0.2933 -0.12931 2010 12 4 55534 0.1651 0.2921 -0.13040 2010 12 5 55535 0.1638 0.2908 -0.13125 2010 12 6 55536 0.1626 0.2896 -0.13194 2010 12 7 55537 0.1613 0.2885 -0.13257 2010 12 8 55538 0.1601 0.2873 -0.13321 2010 12 9 55539 0.1588 0.2862 -0.13392 2010 12 10 55540 0.1575 0.2850 -0.13475 2010 12 11 55541 0.1561 0.2839 -0.13567 2010 12 12 55542 0.1548 0.2829 -0.13669 2010 12 13 55543 0.1534 0.2818 -0.13776 2010 12 14 55544 0.1521 0.2808 -0.13883 2010 12 15 55545 0.1507 0.2798 -0.13988 2010 12 16 55546 0.1493 0.2788 -0.14090 2010 12 17 55547 0.1479 0.2778 -0.14182 2010 12 18 55548 0.1465 0.2769 -0.14266 2010 12 19 55549 0.1450 0.2760 -0.14342 2010 12 20 55550 0.1436 0.2751 -0.14414 2010 12 21 55551 0.1421 0.2742 -0.14485 2010 12 22 55552 0.1407 0.2734 -0.14561 2010 12 23 55553 0.1392 0.2726 -0.14650 2010 12 24 55554 0.1377 0.2718 -0.14757 2010 12 25 55555 0.1362 0.2710 -0.14888 2010 12 26 55556 0.1347 0.2702 -0.15031 2010 12 27 55557 0.1332 0.2695 -0.15182 2010 12 28 55558 0.1317 0.2688 -0.15335 2010 12 29 55559 0.1302 0.2681 -0.15472 2010 12 30 55560 0.1286 0.2675 -0.15587 2010 12 31 55561 0.1271 0.2668 -0.15682 2011 1 1 55562 0.1256 0.2662 -0.15760 2011 1 2 55563 0.1240 0.2657 -0.15827 2011 1 3 55564 0.1225 0.2651 -0.15889 2011 1 4 55565 0.1209 0.2646 -0.15954 2011 1 5 55566 0.1193 0.2641 -0.16020 2011 1 6 55567 0.1178 0.2636 -0.16092 2011 1 7 55568 0.1162 0.2631 -0.16171 2011 1 8 55569 0.1146 0.2627 -0.16258 2011 1 9 55570 0.1131 0.2623 -0.16352 2011 1 10 55571 0.1115 0.2619 -0.16455 2011 1 11 55572 0.1099 0.2616 -0.16562 2011 1 12 55573 0.1084 0.2613 -0.16664 2011 1 13 55574 0.1068 0.2610 -0.16753 2011 1 14 55575 0.1052 0.2607 -0.16826 2011 1 15 55576 0.1036 0.2604 -0.16882 2011 1 16 55577 0.1021 0.2602 -0.16928 2011 1 17 55578 0.1005 0.2600 -0.16969 2011 1 18 55579 0.0989 0.2598 -0.17011 2011 1 19 55580 0.0974 0.2597 -0.17070 2011 1 20 55581 0.0958 0.2595 -0.17152 2011 1 21 55582 0.0942 0.2594 -0.17256 2011 1 22 55583 0.0927 0.2593 -0.17387 2011 1 23 55584 0.0911 0.2593 -0.17533 2011 1 24 55585 0.0896 0.2593 -0.17678 2011 1 25 55586 0.0880 0.2593 -0.17815 2011 1 26 55587 0.0865 0.2593 -0.17932 2011 1 27 55588 0.0850 0.2593 -0.18027 2011 1 28 55589 0.0834 0.2594 -0.18101 2011 1 29 55590 0.0819 0.2595 -0.18155 2011 1 30 55591 0.0804 0.2596 -0.18201 2011 1 31 55592 0.0789 0.2597 -0.18248 2011 2 1 55593 0.0774 0.2599 -0.18304 2011 2 2 55594 0.0759 0.2601 -0.18371 2011 2 3 55595 0.0744 0.2603 -0.18450 2011 2 4 55596 0.0730 0.2605 -0.18540 2011 2 5 55597 0.0715 0.2608 -0.18640 2011 2 6 55598 0.0700 0.2610 -0.18748 2011 2 7 55599 0.0686 0.2613 -0.18866 2011 2 8 55600 0.0672 0.2617 -0.18988 2011 2 9 55601 0.0658 0.2620 -0.19108 2011 2 10 55602 0.0643 0.2624 -0.19223 2011 2 11 55603 0.0629 0.2628 -0.19330 2011 2 12 55604 0.0616 0.2632 -0.19428 2011 2 13 55605 0.0602 0.2636 -0.19522 2011 2 14 55606 0.0588 0.2641 -0.19618 2011 2 15 55607 0.0575 0.2645 -0.19722 2011 2 16 55608 0.0561 0.2650 -0.19845 2011 2 17 55609 0.0548 0.2655 -0.19999 2011 2 18 55610 0.0535 0.2661 -0.20184 2011 2 19 55611 0.0522 0.2666 -0.20390 2011 2 20 55612 0.0510 0.2672 -0.20601 2011 2 21 55613 0.0497 0.2678 -0.20806 2011 2 22 55614 0.0484 0.2684 -0.20991 2011 2 23 55615 0.0472 0.2690 -0.21150 2011 2 24 55616 0.0460 0.2697 -0.21284 2011 2 25 55617 0.0448 0.2704 -0.21397 2011 2 26 55618 0.0436 0.2711 -0.21502 2011 2 27 55619 0.0424 0.2718 -0.21605 2011 2 28 55620 0.0413 0.2725 -0.21713 2011 3 1 55621 0.0402 0.2732 -0.21830 2011 3 2 55622 0.0390 0.2740 -0.21962 2011 3 3 55623 0.0379 0.2748 -0.22107 2011 3 4 55624 0.0369 0.2756 -0.22259 2011 3 5 55625 0.0358 0.2764 -0.22414 2011 3 6 55626 0.0348 0.2772 -0.22571 2011 3 7 55627 0.0337 0.2780 -0.22728 2011 3 8 55628 0.0327 0.2789 -0.22882 2011 3 9 55629 0.0317 0.2798 -0.23026 2011 3 10 55630 0.0308 0.2807 -0.23156 2011 3 11 55631 0.0298 0.2816 -0.23272 2011 3 12 55632 0.0289 0.2825 -0.23382 2011 3 13 55633 0.0280 0.2834 -0.23488 2011 3 14 55634 0.0271 0.2843 -0.23593 2011 3 15 55635 0.0262 0.2853 -0.23705 2011 3 16 55636 0.0254 0.2863 -0.23835 2011 3 17 55637 0.0246 0.2873 -0.23993 2011 3 18 55638 0.0237 0.2882 -0.24179 2011 3 19 55639 0.0230 0.2893 -0.24383 2011 3 20 55640 0.0222 0.2903 -0.24589 2011 3 21 55641 0.0214 0.2913 -0.24782 2011 3 22 55642 0.0207 0.2923 -0.24952 2011 3 23 55643 0.0200 0.2934 -0.25094 2011 3 24 55644 0.0193 0.2944 -0.25211 2011 3 25 55645 0.0187 0.2955 -0.25313 2011 3 26 55646 0.0180 0.2966 -0.25415 2011 3 27 55647 0.0174 0.2977 -0.25526 2011 3 28 55648 0.0168 0.2988 -0.25645 2011 3 29 55649 0.0163 0.2999 -0.25775 2011 3 30 55650 0.0157 0.3010 -0.25915 2011 3 31 55651 0.0152 0.3021 -0.26061 2011 4 1 55652 0.0147 0.3032 -0.26211 2011 4 2 55653 0.0142 0.3044 -0.26364 2011 4 3 55654 0.0137 0.3055 -0.26516 2011 4 4 55655 0.0133 0.3066 -0.26661 2011 4 5 55656 0.0129 0.3078 -0.26794 2011 4 6 55657 0.0125 0.3090 -0.26914 2011 4 7 55658 0.0121 0.3101 -0.27022 2011 4 8 55659 0.0117 0.3113 -0.27119 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) 55275 -63.22 0.16 -8.36 0.10 55276 -63.26 0.18 -8.31 0.34 55277 -63.46 0.18 -8.32 0.34 55278 -63.73 0.21 -8.41 0.34 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 55275 -0.146 0.064 -0.152 0.100 55276 -0.146 0.072 -0.112 0.340 55277 -0.142 0.072 -0.061 0.340 55278 -0.137 0.084 0.014 0.340 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.