********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 1 April 2010 Vol. XXIII No. 013 ______________________________________________________________________ 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 3 26 55281 -.05691 .00009 0.30613 .00009 0.026141 0.000009 10 3 27 55282 -.05761 .00010 0.30830 .00009 0.024668 0.000009 10 3 28 55283 -.05817 .00010 0.31045 .00009 0.022945 0.000011 10 3 29 55284 -.05890 .00010 0.31268 .00009 0.021030 0.000011 10 3 30 55285 -.05990 .00009 0.31483 .00009 0.019052 0.000010 10 3 31 55286 -.06070 .00009 0.31685 .00009 0.017237 0.000011 10 4 1 55287 -.06112 .00009 0.31925 .00009 0.015742 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 = 0.0870 - 0.0984 cos A + 0.0808 sin A - 0.0461 cos C - 0.0970 sin C y = 0.3454 + 0.0724 cos A + 0.0887 sin A - 0.0970 cos C + 0.0461 sin C UT1-UTC = 0.0394 - 0.00087 (MJD - 55295) - (UT2-UT1) where A = 2*pi*(MJD-55287)/365.25 and C = 2*pi*(MJD-55287)/435. TAI-UTC(MJD 55288) = 34.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-55287)**0.80 S t = 0.00025 (MJD-55287)**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 2 55288 -0.0616 0.3214 0.01456 2010 4 3 55289 -0.0618 0.3239 0.01362 2010 4 4 55290 -0.0621 0.3263 0.01282 2010 4 5 55291 -0.0622 0.3287 0.01203 2010 4 6 55292 -0.0623 0.3310 0.01119 2010 4 7 55293 -0.0623 0.3333 0.01024 2010 4 8 55294 -0.0623 0.3355 0.00918 2010 4 9 55295 -0.0622 0.3378 0.00799 2010 4 10 55296 -0.0621 0.3400 0.00668 2010 4 11 55297 -0.0619 0.3423 0.00527 2010 4 12 55298 -0.0617 0.3445 0.00384 2010 4 13 55299 -0.0615 0.3467 0.00242 2010 4 14 55300 -0.0612 0.3490 0.00105 2010 4 15 55301 -0.0609 0.3512 -0.00023 2010 4 16 55302 -0.0606 0.3534 -0.00132 2010 4 17 55303 -0.0602 0.3556 -0.00220 2010 4 18 55304 -0.0598 0.3578 -0.00291 2010 4 19 55305 -0.0593 0.3600 -0.00354 2010 4 20 55306 -0.0588 0.3622 -0.00420 2010 4 21 55307 -0.0583 0.3643 -0.00498 2010 4 22 55308 -0.0577 0.3665 -0.00596 2010 4 23 55309 -0.0571 0.3687 -0.00717 2010 4 24 55310 -0.0565 0.3708 -0.00861 2010 4 25 55311 -0.0558 0.3729 -0.01021 2010 4 26 55312 -0.0551 0.3751 -0.01182 2010 4 27 55313 -0.0543 0.3772 -0.01334 2010 4 28 55314 -0.0535 0.3793 -0.01465 2010 4 29 55315 -0.0527 0.3814 -0.01572 2010 4 30 55316 -0.0519 0.3834 -0.01657 2010 5 1 55317 -0.0510 0.3855 -0.01727 2010 5 2 55318 -0.0501 0.3875 -0.01790 2010 5 3 55319 -0.0491 0.3896 -0.01855 2010 5 4 55320 -0.0482 0.3916 -0.01928 2010 5 5 55321 -0.0471 0.3936 -0.02011 2010 5 6 55322 -0.0461 0.3955 -0.02107 2010 5 7 55323 -0.0450 0.3975 -0.02215 2010 5 8 55324 -0.0439 0.3994 -0.02331 2010 5 9 55325 -0.0428 0.4014 -0.02453 2010 5 10 55326 -0.0416 0.4033 -0.02577 2010 5 11 55327 -0.0404 0.4052 -0.02697 2010 5 12 55328 -0.0392 0.4070 -0.02809 2010 5 13 55329 -0.0379 0.4089 -0.02906 2010 5 14 55330 -0.0366 0.4107 -0.02988 2010 5 15 55331 -0.0353 0.4125 -0.03055 2010 5 16 55332 -0.0340 0.4143 -0.03113 2010 5 17 55333 -0.0326 0.4160 -0.03171 2010 5 18 55334 -0.0312 0.4178 -0.03238 2010 5 19 55335 -0.0298 0.4195 -0.03323 2010 5 20 55336 -0.0283 0.4212 -0.03428 2010 5 21 55337 -0.0269 0.4229 -0.03551 2010 5 22 55338 -0.0254 0.4245 -0.03683 2010 5 23 55339 -0.0238 0.4261 -0.03816 2010 5 24 55340 -0.0223 0.4277 -0.03938 2010 5 25 55341 -0.0207 0.4293 -0.04040 2010 5 26 55342 -0.0191 0.4309 -0.04117 2010 5 27 55343 -0.0175 0.4324 -0.04169 2010 5 28 55344 -0.0158 0.4339 -0.04201 2010 5 29 55345 -0.0142 0.4353 -0.04219 2010 5 30 55346 -0.0125 0.4368 -0.04234 2010 5 31 55347 -0.0108 0.4382 -0.04252 2010 6 1 55348 -0.0090 0.4396 -0.04279 2010 6 2 55349 -0.0073 0.4410 -0.04317 2010 6 3 55350 -0.0055 0.4423 -0.04367 2010 6 4 55351 -0.0037 0.4436 -0.04426 2010 6 5 55352 -0.0019 0.4449 -0.04493 2010 6 6 55353 -0.0001 0.4461 -0.04561 2010 6 7 55354 0.0017 0.4473 -0.04625 2010 6 8 55355 0.0036 0.4485 -0.04680 2010 6 9 55356 0.0055 0.4497 -0.04722 2010 6 10 55357 0.0073 0.4508 -0.04748 2010 6 11 55358 0.0093 0.4519 -0.04759 2010 6 12 55359 0.0112 0.4530 -0.04759 2010 6 13 55360 0.0131 0.4540 -0.04757 2010 6 14 55361 0.0150 0.4550 -0.04763 2010 6 15 55362 0.0170 0.4560 -0.04786 2010 6 16 55363 0.0190 0.4570 -0.04830 2010 6 17 55364 0.0210 0.4579 -0.04895 2010 6 18 55365 0.0230 0.4588 -0.04972 2010 6 19 55366 0.0250 0.4596 -0.05049 2010 6 20 55367 0.0270 0.4604 -0.05116 2010 6 21 55368 0.0290 0.4612 -0.05162 2010 6 22 55369 0.0310 0.4620 -0.05184 2010 6 23 55370 0.0331 0.4627 -0.05182 2010 6 24 55371 0.0351 0.4634 -0.05159 2010 6 25 55372 0.0372 0.4641 -0.05122 2010 6 26 55373 0.0392 0.4647 -0.05081 2010 6 27 55374 0.0413 0.4653 -0.05041 2010 6 28 55375 0.0434 0.4659 -0.05008 2010 6 29 55376 0.0455 0.4664 -0.04987 2010 6 30 55377 0.0475 0.4669 -0.04977 2010 7 1 55378 0.0496 0.4674 -0.04977 2010 7 2 55379 0.0517 0.4678 -0.04985 2010 7 3 55380 0.0538 0.4682 -0.04996 2010 7 4 55381 0.0559 0.4686 -0.05006 2010 7 5 55382 0.0580 0.4689 -0.05009 2010 7 6 55383 0.0601 0.4692 -0.05001 2010 7 7 55384 0.0622 0.4695 -0.04980 2010 7 8 55385 0.0643 0.4697 -0.04945 2010 7 9 55386 0.0664 0.4699 -0.04900 2010 7 10 55387 0.0685 0.4701 -0.04850 2010 7 11 55388 0.0706 0.4702 -0.04807 2010 7 12 55389 0.0727 0.4704 -0.04780 2010 7 13 55390 0.0747 0.4704 -0.04778 2010 7 14 55391 0.0768 0.4705 -0.04802 2010 7 15 55392 0.0789 0.4705 -0.04844 2010 7 16 55393 0.0810 0.4704 -0.04894 2010 7 17 55394 0.0830 0.4704 -0.04936 2010 7 18 55395 0.0851 0.4703 -0.04960 2010 7 19 55396 0.0872 0.4702 -0.04962 2010 7 20 55397 0.0892 0.4700 -0.04939 2010 7 21 55398 0.0912 0.4698 -0.04896 2010 7 22 55399 0.0933 0.4696 -0.04840 2010 7 23 55400 0.0953 0.4694 -0.04779 2010 7 24 55401 0.0973 0.4691 -0.04720 2010 7 25 55402 0.0993 0.4688 -0.04669 2010 7 26 55403 0.1013 0.4684 -0.04630 2010 7 27 55404 0.1033 0.4681 -0.04605 2010 7 28 55405 0.1053 0.4677 -0.04593 2010 7 29 55406 0.1072 0.4672 -0.04590 2010 7 30 55407 0.1092 0.4668 -0.04594 2010 7 31 55408 0.1111 0.4663 -0.04599 2010 8 1 55409 0.1130 0.4658 -0.04600 2010 8 2 55410 0.1149 0.4652 -0.04594 2010 8 3 55411 0.1168 0.4646 -0.04577 2010 8 4 55412 0.1187 0.4640 -0.04548 2010 8 5 55413 0.1205 0.4634 -0.04510 2010 8 6 55414 0.1224 0.4627 -0.04468 2010 8 7 55415 0.1242 0.4620 -0.04429 2010 8 8 55416 0.1260 0.4613 -0.04405 2010 8 9 55417 0.1278 0.4605 -0.04405 2010 8 10 55418 0.1296 0.4597 -0.04434 2010 8 11 55419 0.1314 0.4589 -0.04491 2010 8 12 55420 0.1331 0.4581 -0.04564 2010 8 13 55421 0.1348 0.4572 -0.04638 2010 8 14 55422 0.1365 0.4564 -0.04699 2010 8 15 55423 0.1382 0.4554 -0.04737 2010 8 16 55424 0.1399 0.4545 -0.04748 2010 8 17 55425 0.1415 0.4535 -0.04738 2010 8 18 55426 0.1431 0.4525 -0.04712 2010 8 19 55427 0.1448 0.4515 -0.04680 2010 8 20 55428 0.1463 0.4505 -0.04649 2010 8 21 55429 0.1479 0.4494 -0.04626 2010 8 22 55430 0.1494 0.4484 -0.04615 2010 8 23 55431 0.1509 0.4472 -0.04618 2010 8 24 55432 0.1524 0.4461 -0.04636 2010 8 25 55433 0.1539 0.4450 -0.04666 2010 8 26 55434 0.1553 0.4438 -0.04705 2010 8 27 55435 0.1567 0.4426 -0.04746 2010 8 28 55436 0.1581 0.4414 -0.04786 2010 8 29 55437 0.1595 0.4401 -0.04820 2010 8 30 55438 0.1609 0.4389 -0.04844 2010 8 31 55439 0.1622 0.4376 -0.04858 2010 9 1 55440 0.1635 0.4363 -0.04863 2010 9 2 55441 0.1647 0.4350 -0.04861 2010 9 3 55442 0.1660 0.4336 -0.04861 2010 9 4 55443 0.1672 0.4323 -0.04871 2010 9 5 55444 0.1684 0.4309 -0.04901 2010 9 6 55445 0.1695 0.4295 -0.04960 2010 9 7 55446 0.1707 0.4281 -0.05049 2010 9 8 55447 0.1718 0.4267 -0.05162 2010 9 9 55448 0.1728 0.4252 -0.05286 2010 9 10 55449 0.1739 0.4238 -0.05405 2010 9 11 55450 0.1749 0.4223 -0.05506 2010 9 12 55451 0.1759 0.4208 -0.05581 2010 9 13 55452 0.1769 0.4193 -0.05630 2010 9 14 55453 0.1778 0.4178 -0.05660 2010 9 15 55454 0.1787 0.4163 -0.05680 2010 9 16 55455 0.1796 0.4147 -0.05699 2010 9 17 55456 0.1804 0.4132 -0.05723 2010 9 18 55457 0.1813 0.4116 -0.05759 2010 9 19 55458 0.1821 0.4100 -0.05807 2010 9 20 55459 0.1828 0.4084 -0.05870 2010 9 21 55460 0.1835 0.4068 -0.05945 2010 9 22 55461 0.1842 0.4052 -0.06028 2010 9 23 55462 0.1849 0.4036 -0.06116 2010 9 24 55463 0.1856 0.4020 -0.06202 2010 9 25 55464 0.1862 0.4003 -0.06282 2010 9 26 55465 0.1867 0.3987 -0.06353 2010 9 27 55466 0.1873 0.3970 -0.06411 2010 9 28 55467 0.1878 0.3954 -0.06457 2010 9 29 55468 0.1883 0.3937 -0.06494 2010 9 30 55469 0.1888 0.3920 -0.06528 2010 10 1 55470 0.1892 0.3903 -0.06566 2010 10 2 55471 0.1896 0.3886 -0.06616 2010 10 3 55472 0.1900 0.3869 -0.06686 2010 10 4 55473 0.1903 0.3852 -0.06780 2010 10 5 55474 0.1906 0.3835 -0.06896 2010 10 6 55475 0.1909 0.3818 -0.07025 2010 10 7 55476 0.1911 0.3801 -0.07154 2010 10 8 55477 0.1913 0.3784 -0.07269 2010 10 9 55478 0.1915 0.3767 -0.07359 2010 10 10 55479 0.1917 0.3750 -0.07422 2010 10 11 55480 0.1918 0.3733 -0.07462 2010 10 12 55481 0.1919 0.3716 -0.07490 2010 10 13 55482 0.1919 0.3698 -0.07516 2010 10 14 55483 0.1920 0.3681 -0.07548 2010 10 15 55484 0.1920 0.3664 -0.07593 2010 10 16 55485 0.1920 0.3647 -0.07654 2010 10 17 55486 0.1919 0.3630 -0.07732 2010 10 18 55487 0.1918 0.3613 -0.07824 2010 10 19 55488 0.1917 0.3596 -0.07928 2010 10 20 55489 0.1915 0.3579 -0.08039 2010 10 21 55490 0.1914 0.3562 -0.08153 2010 10 22 55491 0.1912 0.3545 -0.08262 2010 10 23 55492 0.1909 0.3528 -0.08364 2010 10 24 55493 0.1907 0.3511 -0.08453 2010 10 25 55494 0.1904 0.3494 -0.08530 2010 10 26 55495 0.1901 0.3477 -0.08596 2010 10 27 55496 0.1897 0.3460 -0.08658 2010 10 28 55497 0.1893 0.3444 -0.08723 2010 10 29 55498 0.1889 0.3427 -0.08800 2010 10 30 55499 0.1885 0.3411 -0.08897 2010 10 31 55500 0.1880 0.3394 -0.09016 2010 11 1 55501 0.1876 0.3378 -0.09160 2010 11 2 55502 0.1870 0.3362 -0.09322 2010 11 3 55503 0.1865 0.3346 -0.09494 2010 11 4 55504 0.1859 0.3330 -0.09662 2010 11 5 55505 0.1853 0.3314 -0.09814 2010 11 6 55506 0.1847 0.3298 -0.09943 2010 11 7 55507 0.1841 0.3282 -0.10049 2010 11 8 55508 0.1834 0.3266 -0.10139 2010 11 9 55509 0.1827 0.3251 -0.10221 2010 11 10 55510 0.1820 0.3236 -0.10303 2010 11 11 55511 0.1812 0.3220 -0.10393 2010 11 12 55512 0.1805 0.3205 -0.10492 2010 11 13 55513 0.1797 0.3190 -0.10601 2010 11 14 55514 0.1788 0.3175 -0.10719 2010 11 15 55515 0.1780 0.3161 -0.10847 2010 11 16 55516 0.1771 0.3146 -0.10980 2010 11 17 55517 0.1762 0.3132 -0.11117 2010 11 18 55518 0.1753 0.3117 -0.11253 2010 11 19 55519 0.1744 0.3103 -0.11382 2010 11 20 55520 0.1734 0.3089 -0.11495 2010 11 21 55521 0.1725 0.3075 -0.11592 2010 11 22 55522 0.1715 0.3062 -0.11675 2010 11 23 55523 0.1704 0.3048 -0.11749 2010 11 24 55524 0.1694 0.3035 -0.11820 2010 11 25 55525 0.1683 0.3022 -0.11897 2010 11 26 55526 0.1673 0.3009 -0.11991 2010 11 27 55527 0.1661 0.2996 -0.12104 2010 11 28 55528 0.1650 0.2983 -0.12238 2010 11 29 55529 0.1639 0.2971 -0.12389 2010 11 30 55530 0.1627 0.2959 -0.12547 2010 12 1 55531 0.1616 0.2947 -0.12703 2010 12 2 55532 0.1604 0.2935 -0.12849 2010 12 3 55533 0.1592 0.2923 -0.12977 2010 12 4 55534 0.1579 0.2912 -0.13086 2010 12 5 55535 0.1567 0.2901 -0.13179 2010 12 6 55536 0.1554 0.2890 -0.13262 2010 12 7 55537 0.1542 0.2879 -0.13343 2010 12 8 55538 0.1529 0.2868 -0.13426 2010 12 9 55539 0.1516 0.2858 -0.13516 2010 12 10 55540 0.1503 0.2848 -0.13614 2010 12 11 55541 0.1489 0.2838 -0.13725 2010 12 12 55542 0.1476 0.2828 -0.13838 2010 12 13 55543 0.1462 0.2818 -0.13956 2010 12 14 55544 0.1449 0.2809 -0.14079 2010 12 15 55545 0.1435 0.2800 -0.14197 2010 12 16 55546 0.1421 0.2791 -0.14304 2010 12 17 55547 0.1407 0.2782 -0.14402 2010 12 18 55548 0.1393 0.2774 -0.14490 2010 12 19 55549 0.1378 0.2766 -0.14570 2010 12 20 55550 0.1364 0.2758 -0.14643 2010 12 21 55551 0.1350 0.2750 -0.14713 2010 12 22 55552 0.1335 0.2743 -0.14783 2010 12 23 55553 0.1320 0.2735 -0.14862 2010 12 24 55554 0.1306 0.2728 -0.14957 2010 12 25 55555 0.1291 0.2722 -0.15071 2010 12 26 55556 0.1276 0.2715 -0.15203 2010 12 27 55557 0.1261 0.2709 -0.15351 2010 12 28 55558 0.1246 0.2703 -0.15501 2010 12 29 55559 0.1231 0.2697 -0.15639 2010 12 30 55560 0.1216 0.2691 -0.15754 2010 12 31 55561 0.1201 0.2686 -0.15841 2011 1 1 55562 0.1186 0.2681 -0.15903 2011 1 2 55563 0.1171 0.2676 -0.15949 2011 1 3 55564 0.1155 0.2671 -0.15988 2011 1 4 55565 0.1140 0.2667 -0.16026 2011 1 5 55566 0.1125 0.2663 -0.16075 2011 1 6 55567 0.1109 0.2659 -0.16138 2011 1 7 55568 0.1094 0.2655 -0.16209 2011 1 8 55569 0.1079 0.2652 -0.16294 2011 1 9 55570 0.1063 0.2649 -0.16388 2011 1 10 55571 0.1048 0.2646 -0.16482 2011 1 11 55572 0.1033 0.2643 -0.16576 2011 1 12 55573 0.1017 0.2641 -0.16666 2011 1 13 55574 0.1002 0.2639 -0.16748 2011 1 14 55575 0.0987 0.2637 -0.16818 2011 1 15 55576 0.0971 0.2635 -0.16873 2011 1 16 55577 0.0956 0.2634 -0.16917 2011 1 17 55578 0.0941 0.2632 -0.16959 2011 1 18 55579 0.0925 0.2631 -0.17007 2011 1 19 55580 0.0910 0.2631 -0.17068 2011 1 20 55581 0.0895 0.2630 -0.17149 2011 1 21 55582 0.0880 0.2630 -0.17254 2011 1 22 55583 0.0865 0.2630 -0.17384 2011 1 23 55584 0.0850 0.2630 -0.17530 2011 1 24 55585 0.0835 0.2631 -0.17688 2011 1 25 55586 0.0820 0.2632 -0.17841 2011 1 26 55587 0.0805 0.2632 -0.17982 2011 1 27 55588 0.0790 0.2634 -0.18103 2011 1 28 55589 0.0776 0.2635 -0.18206 2011 1 29 55590 0.0761 0.2637 -0.18293 2011 1 30 55591 0.0746 0.2639 -0.18374 2011 1 31 55592 0.0732 0.2641 -0.18457 2011 2 1 55593 0.0718 0.2643 -0.18544 2011 2 2 55594 0.0703 0.2646 -0.18643 2011 2 3 55595 0.0689 0.2648 -0.18758 2011 2 4 55596 0.0675 0.2651 -0.18890 2011 2 5 55597 0.0661 0.2655 -0.19030 2011 2 6 55598 0.0647 0.2658 -0.19171 2011 2 7 55599 0.0633 0.2662 -0.19310 2011 2 8 55600 0.0620 0.2666 -0.19443 2011 2 9 55601 0.0606 0.2670 -0.19567 2011 2 10 55602 0.0593 0.2674 -0.19681 2011 2 11 55603 0.0580 0.2679 -0.19782 2011 2 12 55604 0.0567 0.2683 -0.19876 2011 2 13 55605 0.0554 0.2688 -0.19964 2011 2 14 55606 0.0541 0.2693 -0.20054 2011 2 15 55607 0.0528 0.2699 -0.20154 2011 2 16 55608 0.0515 0.2704 -0.20275 2011 2 17 55609 0.0503 0.2710 -0.20424 2011 2 18 55610 0.0491 0.2716 -0.20598 2011 2 19 55611 0.0478 0.2722 -0.20789 2011 2 20 55612 0.0466 0.2728 -0.20991 2011 2 21 55613 0.0455 0.2735 -0.21191 2011 2 22 55614 0.0443 0.2741 -0.21376 2011 2 23 55615 0.0431 0.2748 -0.21537 2011 2 24 55616 0.0420 0.2755 -0.21670 2011 2 25 55617 0.0409 0.2762 -0.21780 2011 2 26 55618 0.0398 0.2770 -0.21880 2011 2 27 55619 0.0387 0.2777 -0.21977 2011 2 28 55620 0.0376 0.2785 -0.22072 2011 3 1 55621 0.0366 0.2793 -0.22170 2011 3 2 55622 0.0356 0.2801 -0.22274 2011 3 3 55623 0.0345 0.2809 -0.22392 2011 3 4 55624 0.0336 0.2817 -0.22522 2011 3 5 55625 0.0326 0.2826 -0.22659 2011 3 6 55626 0.0316 0.2834 -0.22796 2011 3 7 55627 0.0307 0.2843 -0.22929 2011 3 8 55628 0.0298 0.2852 -0.23053 2011 3 9 55629 0.0289 0.2861 -0.23166 2011 3 10 55630 0.0280 0.2870 -0.23267 2011 3 11 55631 0.0271 0.2880 -0.23359 2011 3 12 55632 0.0263 0.2889 -0.23449 2011 3 13 55633 0.0255 0.2899 -0.23544 2011 3 14 55634 0.0247 0.2908 -0.23646 2011 3 15 55635 0.0239 0.2918 -0.23764 2011 3 16 55636 0.0231 0.2928 -0.23903 2011 3 17 55637 0.0224 0.2938 -0.24068 2011 3 18 55638 0.0217 0.2948 -0.24256 2011 3 19 55639 0.0210 0.2959 -0.24462 2011 3 20 55640 0.0203 0.2969 -0.24675 2011 3 21 55641 0.0197 0.2979 -0.24875 2011 3 22 55642 0.0191 0.2990 -0.25052 2011 3 23 55643 0.0184 0.3001 -0.25201 2011 3 24 55644 0.0179 0.3011 -0.25326 2011 3 25 55645 0.0173 0.3022 -0.25432 2011 3 26 55646 0.0168 0.3033 -0.25533 2011 3 27 55647 0.0162 0.3044 -0.25637 2011 3 28 55648 0.0157 0.3055 -0.25748 2011 3 29 55649 0.0153 0.3066 -0.25863 2011 3 30 55650 0.0148 0.3077 -0.25983 2011 3 31 55651 0.0144 0.3088 -0.26111 2011 4 1 55652 0.0140 0.3100 -0.26246 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) 55268 -63.70 0.37 -7.87 0.14 55269 -63.42 0.31 -7.66 0.10 55270 -63.30 0.31 -7.61 0.10 55271 -63.27 0.24 -7.83 0.34 55272 -63.30 0.15 -8.14 0.34 55273 -63.30 0.15 -8.38 0.34 55274 -63.22 0.15 -8.47 0.34 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 55268 -0.127 0.147 -0.135 0.140 55269 -0.119 0.123 -0.117 0.100 55270 -0.127 0.123 -0.117 0.100 55271 -0.136 0.095 -0.160 0.340 55272 -0.145 0.060 -0.181 0.340 55273 -0.138 0.060 -0.207 0.340 55274 -0.122 0.060 -0.235 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.