********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 18 March 2010 Vol. XXIII No. 011 ______________________________________________________________________ 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 ********************************************************************** * As of Bulletin A Vol. XXIII, No. 011, on 18 March 2010, we have * * updated the IAA VLBI systematic bias and slope corrections. * * The effect appears to be less than 0.05 mas in polar motion and * * 10 us in UT1-UTC. * ********************************************************************** ________________________________________________________________________ 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 12 55267 -.04798 .00009 0.27569 .00009 0.039588 0.000018 10 3 13 55268 -.04875 .00009 0.27769 .00009 0.038477 0.000020 10 3 14 55269 -.04968 .00009 0.28008 .00009 0.037375 0.000022 10 3 15 55270 -.05083 .00009 0.28275 .00009 0.036251 0.000023 10 3 16 55271 -.05183 .00009 0.28536 .00009 0.035058 0.000024 10 3 17 55272 -.05255 .00009 0.28768 .00009 0.033790 0.000025 10 3 18 55273 -.05318 .00009 0.28969 .00009 0.032539 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 = 0.0874 - 0.1148 cos A + 0.0607 sin A - 0.0233 cos C - 0.1090 sin C y = 0.3468 + 0.0537 cos A + 0.1032 sin A - 0.1090 cos C + 0.0233 sin C UT1-UTC = 0.0483 - 0.00088 (MJD - 55281) - (UT2-UT1) where A = 2*pi*(MJD-55273)/365.25 and C = 2*pi*(MJD-55273)/435. TAI-UTC(MJD 55274) = 34.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-55273)**0.80 S t = 0.00025 (MJD-55273)**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 3 19 55274 -0.0537 0.2918 0.03148 2010 3 20 55275 -0.0543 0.2938 0.03061 2010 3 21 55276 -0.0548 0.2959 0.02992 2010 3 22 55277 -0.0553 0.2979 0.02935 2010 3 23 55278 -0.0559 0.3000 0.02883 2010 3 24 55279 -0.0564 0.3022 0.02822 2010 3 25 55280 -0.0569 0.3043 0.02742 2010 3 26 55281 -0.0573 0.3065 0.02636 2010 3 27 55282 -0.0577 0.3086 0.02502 2010 3 28 55283 -0.0581 0.3108 0.02349 2010 3 29 55284 -0.0585 0.3129 0.02185 2010 3 30 55285 -0.0588 0.3151 0.02022 2010 3 31 55286 -0.0591 0.3173 0.01872 2010 4 1 55287 -0.0593 0.3194 0.01749 2010 4 2 55288 -0.0595 0.3216 0.01650 2010 4 3 55289 -0.0597 0.3238 0.01568 2010 4 4 55290 -0.0598 0.3260 0.01493 2010 4 5 55291 -0.0599 0.3281 0.01419 2010 4 6 55292 -0.0599 0.3303 0.01339 2010 4 7 55293 -0.0600 0.3325 0.01248 2010 4 8 55294 -0.0599 0.3347 0.01142 2010 4 9 55295 -0.0599 0.3368 0.01020 2010 4 10 55296 -0.0598 0.3390 0.00883 2010 4 11 55297 -0.0596 0.3412 0.00734 2010 4 12 55298 -0.0595 0.3434 0.00576 2010 4 13 55299 -0.0593 0.3455 0.00415 2010 4 14 55300 -0.0590 0.3477 0.00259 2010 4 15 55301 -0.0587 0.3498 0.00113 2010 4 16 55302 -0.0584 0.3520 -0.00017 2010 4 17 55303 -0.0580 0.3541 -0.00132 2010 4 18 55304 -0.0577 0.3563 -0.00234 2010 4 19 55305 -0.0572 0.3584 -0.00331 2010 4 20 55306 -0.0568 0.3605 -0.00433 2010 4 21 55307 -0.0563 0.3626 -0.00549 2010 4 22 55308 -0.0557 0.3647 -0.00687 2010 4 23 55309 -0.0552 0.3668 -0.00847 2010 4 24 55310 -0.0546 0.3689 -0.01027 2010 4 25 55311 -0.0539 0.3710 -0.01219 2010 4 26 55312 -0.0532 0.3730 -0.01410 2010 4 27 55313 -0.0525 0.3751 -0.01587 2010 4 28 55314 -0.0518 0.3771 -0.01742 2010 4 29 55315 -0.0510 0.3792 -0.01869 2010 4 30 55316 -0.0502 0.3812 -0.01971 2010 5 1 55317 -0.0494 0.3832 -0.02054 2010 5 2 55318 -0.0485 0.3852 -0.02127 2010 5 3 55319 -0.0476 0.3871 -0.02199 2010 5 4 55320 -0.0467 0.3891 -0.02276 2010 5 5 55321 -0.0457 0.3910 -0.02361 2010 5 6 55322 -0.0447 0.3930 -0.02457 2010 5 7 55323 -0.0437 0.3949 -0.02564 2010 5 8 55324 -0.0426 0.3968 -0.02678 2010 5 9 55325 -0.0415 0.3987 -0.02798 2010 5 10 55326 -0.0404 0.4005 -0.02918 2010 5 11 55327 -0.0392 0.4024 -0.03033 2010 5 12 55328 -0.0380 0.4042 -0.03139 2010 5 13 55329 -0.0368 0.4060 -0.03232 2010 5 14 55330 -0.0356 0.4078 -0.03309 2010 5 15 55331 -0.0343 0.4095 -0.03372 2010 5 16 55332 -0.0330 0.4113 -0.03427 2010 5 17 55333 -0.0317 0.4130 -0.03482 2010 5 18 55334 -0.0304 0.4147 -0.03546 2010 5 19 55335 -0.0290 0.4164 -0.03628 2010 5 20 55336 -0.0276 0.4180 -0.03729 2010 5 21 55337 -0.0262 0.4196 -0.03848 2010 5 22 55338 -0.0247 0.4213 -0.03978 2010 5 23 55339 -0.0232 0.4228 -0.04108 2010 5 24 55340 -0.0217 0.4244 -0.04228 2010 5 25 55341 -0.0202 0.4259 -0.04327 2010 5 26 55342 -0.0187 0.4275 -0.04402 2010 5 27 55343 -0.0171 0.4289 -0.04453 2010 5 28 55344 -0.0155 0.4304 -0.04483 2010 5 29 55345 -0.0139 0.4319 -0.04501 2010 5 30 55346 -0.0123 0.4333 -0.04514 2010 5 31 55347 -0.0106 0.4347 -0.04529 2010 6 1 55348 -0.0089 0.4360 -0.04551 2010 6 2 55349 -0.0072 0.4374 -0.04583 2010 6 3 55350 -0.0055 0.4387 -0.04625 2010 6 4 55351 -0.0038 0.4399 -0.04675 2010 6 5 55352 -0.0021 0.4412 -0.04731 2010 6 6 55353 -0.0003 0.4424 -0.04789 2010 6 7 55354 0.0015 0.4436 -0.04842 2010 6 8 55355 0.0033 0.4448 -0.04886 2010 6 9 55356 0.0051 0.4459 -0.04917 2010 6 10 55357 0.0070 0.4470 -0.04933 2010 6 11 55358 0.0088 0.4481 -0.04933 2010 6 12 55359 0.0107 0.4492 -0.04923 2010 6 13 55360 0.0125 0.4502 -0.04910 2010 6 14 55361 0.0144 0.4512 -0.04906 2010 6 15 55362 0.0163 0.4522 -0.04918 2010 6 16 55363 0.0182 0.4531 -0.04952 2010 6 17 55364 0.0202 0.4540 -0.05006 2010 6 18 55365 0.0221 0.4549 -0.05072 2010 6 19 55366 0.0240 0.4557 -0.05140 2010 6 20 55367 0.0260 0.4565 -0.05197 2010 6 21 55368 0.0280 0.4573 -0.05236 2010 6 22 55369 0.0299 0.4581 -0.05252 2010 6 23 55370 0.0319 0.4588 -0.05244 2010 6 24 55371 0.0339 0.4595 -0.05216 2010 6 25 55372 0.0359 0.4601 -0.05176 2010 6 26 55373 0.0379 0.4608 -0.05130 2010 6 27 55374 0.0399 0.4614 -0.05087 2010 6 28 55375 0.0420 0.4619 -0.05052 2010 6 29 55376 0.0440 0.4625 -0.05028 2010 6 30 55377 0.0460 0.4630 -0.05016 2010 7 1 55378 0.0480 0.4634 -0.05015 2010 7 2 55379 0.0501 0.4639 -0.05022 2010 7 3 55380 0.0521 0.4643 -0.05032 2010 7 4 55381 0.0541 0.4647 -0.05041 2010 7 5 55382 0.0562 0.4650 -0.05046 2010 7 6 55383 0.0582 0.4653 -0.05040 2010 7 7 55384 0.0603 0.4656 -0.05022 2010 7 8 55385 0.0623 0.4659 -0.04991 2010 7 9 55386 0.0643 0.4661 -0.04949 2010 7 10 55387 0.0664 0.4663 -0.04903 2010 7 11 55388 0.0684 0.4664 -0.04864 2010 7 12 55389 0.0704 0.4666 -0.04842 2010 7 13 55390 0.0725 0.4666 -0.04844 2010 7 14 55391 0.0745 0.4667 -0.04872 2010 7 15 55392 0.0765 0.4667 -0.04919 2010 7 16 55393 0.0785 0.4667 -0.04973 2010 7 17 55394 0.0806 0.4667 -0.05020 2010 7 18 55395 0.0826 0.4666 -0.05050 2010 7 19 55396 0.0846 0.4665 -0.05055 2010 7 20 55397 0.0866 0.4664 -0.05036 2010 7 21 55398 0.0886 0.4663 -0.04997 2010 7 22 55399 0.0905 0.4661 -0.04945 2010 7 23 55400 0.0925 0.4659 -0.04887 2010 7 24 55401 0.0945 0.4656 -0.04832 2010 7 25 55402 0.0964 0.4653 -0.04785 2010 7 26 55403 0.0984 0.4650 -0.04749 2010 7 27 55404 0.1003 0.4647 -0.04728 2010 7 28 55405 0.1022 0.4643 -0.04719 2010 7 29 55406 0.1041 0.4639 -0.04720 2010 7 30 55407 0.1060 0.4635 -0.04728 2010 7 31 55408 0.1079 0.4630 -0.04736 2010 8 1 55409 0.1098 0.4625 -0.04741 2010 8 2 55410 0.1117 0.4620 -0.04738 2010 8 3 55411 0.1135 0.4615 -0.04724 2010 8 4 55412 0.1153 0.4609 -0.04698 2010 8 5 55413 0.1172 0.4603 -0.04663 2010 8 6 55414 0.1190 0.4597 -0.04623 2010 8 7 55415 0.1207 0.4590 -0.04586 2010 8 8 55416 0.1225 0.4584 -0.04564 2010 8 9 55417 0.1243 0.4576 -0.04566 2010 8 10 55418 0.1260 0.4569 -0.04597 2010 8 11 55419 0.1277 0.4562 -0.04654 2010 8 12 55420 0.1294 0.4554 -0.04728 2010 8 13 55421 0.1311 0.4546 -0.04803 2010 8 14 55422 0.1328 0.4537 -0.04864 2010 8 15 55423 0.1344 0.4528 -0.04902 2010 8 16 55424 0.1361 0.4520 -0.04914 2010 8 17 55425 0.1377 0.4510 -0.04904 2010 8 18 55426 0.1392 0.4501 -0.04879 2010 8 19 55427 0.1408 0.4491 -0.04847 2010 8 20 55428 0.1424 0.4482 -0.04816 2010 8 21 55429 0.1439 0.4472 -0.04794 2010 8 22 55430 0.1454 0.4461 -0.04783 2010 8 23 55431 0.1469 0.4451 -0.04787 2010 8 24 55432 0.1483 0.4440 -0.04805 2010 8 25 55433 0.1498 0.4429 -0.04835 2010 8 26 55434 0.1512 0.4418 -0.04873 2010 8 27 55435 0.1526 0.4406 -0.04914 2010 8 28 55436 0.1539 0.4395 -0.04953 2010 8 29 55437 0.1553 0.4383 -0.04986 2010 8 30 55438 0.1566 0.4371 -0.05009 2010 8 31 55439 0.1579 0.4359 -0.05022 2010 9 1 55440 0.1591 0.4346 -0.05025 2010 9 2 55441 0.1604 0.4334 -0.05022 2010 9 3 55442 0.1616 0.4321 -0.05020 2010 9 4 55443 0.1628 0.4308 -0.05029 2010 9 5 55444 0.1639 0.4295 -0.05058 2010 9 6 55445 0.1651 0.4281 -0.05114 2010 9 7 55446 0.1662 0.4268 -0.05201 2010 9 8 55447 0.1673 0.4254 -0.05311 2010 9 9 55448 0.1683 0.4240 -0.05432 2010 9 10 55449 0.1694 0.4226 -0.05547 2010 9 11 55450 0.1704 0.4212 -0.05644 2010 9 12 55451 0.1714 0.4198 -0.05713 2010 9 13 55452 0.1723 0.4184 -0.05755 2010 9 14 55453 0.1732 0.4169 -0.05776 2010 9 15 55454 0.1741 0.4155 -0.05786 2010 9 16 55455 0.1750 0.4140 -0.05792 2010 9 17 55456 0.1758 0.4125 -0.05801 2010 9 18 55457 0.1766 0.4110 -0.05818 2010 9 19 55458 0.1774 0.4095 -0.05844 2010 9 20 55459 0.1782 0.4079 -0.05881 2010 9 21 55460 0.1789 0.4064 -0.05925 2010 9 22 55461 0.1796 0.4048 -0.05973 2010 9 23 55462 0.1802 0.4033 -0.06021 2010 9 24 55463 0.1809 0.4017 -0.06066 2010 9 25 55464 0.1815 0.4002 -0.06104 2010 9 26 55465 0.1820 0.3986 -0.06134 2010 9 27 55466 0.1826 0.3970 -0.06157 2010 9 28 55467 0.1831 0.3954 -0.06173 2010 9 29 55468 0.1836 0.3938 -0.06188 2010 9 30 55469 0.1840 0.3922 -0.06206 2010 10 1 55470 0.1845 0.3905 -0.06236 2010 10 2 55471 0.1849 0.3889 -0.06285 2010 10 3 55472 0.1852 0.3873 -0.06361 2010 10 4 55473 0.1856 0.3857 -0.06468 2010 10 5 55474 0.1859 0.3840 -0.06603 2010 10 6 55475 0.1862 0.3824 -0.06757 2010 10 7 55476 0.1864 0.3807 -0.06916 2010 10 8 55477 0.1866 0.3791 -0.07066 2010 10 9 55478 0.1868 0.3774 -0.07196 2010 10 10 55479 0.1870 0.3758 -0.07302 2010 10 11 55480 0.1871 0.3741 -0.07386 2010 10 12 55481 0.1872 0.3725 -0.07457 2010 10 13 55482 0.1873 0.3708 -0.07525 2010 10 14 55483 0.1873 0.3692 -0.07597 2010 10 15 55484 0.1873 0.3675 -0.07680 2010 10 16 55485 0.1873 0.3659 -0.07775 2010 10 17 55486 0.1873 0.3642 -0.07884 2010 10 18 55487 0.1872 0.3626 -0.08005 2010 10 19 55488 0.1871 0.3609 -0.08135 2010 10 20 55489 0.1870 0.3593 -0.08273 2010 10 21 55490 0.1868 0.3577 -0.08412 2010 10 22 55491 0.1866 0.3560 -0.08549 2010 10 23 55492 0.1864 0.3544 -0.08675 2010 10 24 55493 0.1862 0.3528 -0.08786 2010 10 25 55494 0.1859 0.3511 -0.08882 2010 10 26 55495 0.1856 0.3495 -0.08966 2010 10 27 55496 0.1853 0.3479 -0.09043 2010 10 28 55497 0.1849 0.3463 -0.09121 2010 10 29 55498 0.1845 0.3447 -0.09210 2010 10 30 55499 0.1841 0.3431 -0.09317 2010 10 31 55500 0.1837 0.3415 -0.09447 2010 11 1 55501 0.1832 0.3400 -0.09602 2010 11 2 55502 0.1827 0.3384 -0.09774 2010 11 3 55503 0.1822 0.3368 -0.09954 2010 11 4 55504 0.1817 0.3353 -0.10134 2010 11 5 55505 0.1811 0.3337 -0.10299 2010 11 6 55506 0.1805 0.3322 -0.10445 2010 11 7 55507 0.1799 0.3307 -0.10570 2010 11 8 55508 0.1793 0.3292 -0.10679 2010 11 9 55509 0.1786 0.3277 -0.10780 2010 11 10 55510 0.1779 0.3262 -0.10878 2010 11 11 55511 0.1772 0.3247 -0.10979 2010 11 12 55512 0.1765 0.3233 -0.11089 2010 11 13 55513 0.1757 0.3218 -0.11211 2010 11 14 55514 0.1749 0.3204 -0.11338 2010 11 15 55515 0.1741 0.3190 -0.11472 2010 11 16 55516 0.1733 0.3176 -0.11616 2010 11 17 55517 0.1724 0.3162 -0.11758 2010 11 18 55518 0.1715 0.3148 -0.11892 2010 11 19 55519 0.1707 0.3134 -0.12019 2010 11 20 55520 0.1697 0.3121 -0.12138 2010 11 21 55521 0.1688 0.3107 -0.12246 2010 11 22 55522 0.1678 0.3094 -0.12344 2010 11 23 55523 0.1669 0.3081 -0.12434 2010 11 24 55524 0.1659 0.3068 -0.12519 2010 11 25 55525 0.1648 0.3056 -0.12605 2010 11 26 55526 0.1638 0.3043 -0.12701 2010 11 27 55527 0.1627 0.3031 -0.12815 2010 11 28 55528 0.1617 0.3018 -0.12951 2010 11 29 55529 0.1606 0.3006 -0.13109 2010 11 30 55530 0.1595 0.2995 -0.13280 2010 12 1 55531 0.1583 0.2983 -0.13449 2010 12 2 55532 0.1572 0.2971 -0.13601 2010 12 3 55533 0.1560 0.2960 -0.13728 2010 12 4 55534 0.1548 0.2949 -0.13825 2010 12 5 55535 0.1536 0.2938 -0.13901 2010 12 6 55536 0.1524 0.2928 -0.13962 2010 12 7 55537 0.1512 0.2917 -0.14015 2010 12 8 55538 0.1500 0.2907 -0.14075 2010 12 9 55539 0.1487 0.2897 -0.14145 2010 12 10 55540 0.1475 0.2887 -0.14224 2010 12 11 55541 0.1462 0.2877 -0.14315 2010 12 12 55542 0.1449 0.2868 -0.14417 2010 12 13 55543 0.1436 0.2858 -0.14523 2010 12 14 55544 0.1423 0.2849 -0.14631 2010 12 15 55545 0.1409 0.2840 -0.14737 2010 12 16 55546 0.1396 0.2832 -0.14836 2010 12 17 55547 0.1382 0.2823 -0.14924 2010 12 18 55548 0.1369 0.2815 -0.14995 2010 12 19 55549 0.1355 0.2807 -0.15053 2010 12 20 55550 0.1341 0.2799 -0.15103 2010 12 21 55551 0.1327 0.2792 -0.15153 2010 12 22 55552 0.1313 0.2785 -0.15208 2010 12 23 55553 0.1299 0.2777 -0.15276 2010 12 24 55554 0.1285 0.2771 -0.15365 2010 12 25 55555 0.1271 0.2764 -0.15476 2010 12 26 55556 0.1256 0.2758 -0.15608 2010 12 27 55557 0.1242 0.2751 -0.15758 2010 12 28 55558 0.1228 0.2745 -0.15913 2010 12 29 55559 0.1213 0.2740 -0.16062 2010 12 30 55560 0.1199 0.2734 -0.16195 2010 12 31 55561 0.1184 0.2729 -0.16309 2011 1 1 55562 0.1170 0.2724 -0.16402 2011 1 2 55563 0.1155 0.2719 -0.16483 2011 1 3 55564 0.1140 0.2715 -0.16559 2011 1 4 55565 0.1125 0.2710 -0.16633 2011 1 5 55566 0.1111 0.2706 -0.16716 2011 1 6 55567 0.1096 0.2702 -0.16815 2011 1 7 55568 0.1081 0.2699 -0.16929 2011 1 8 55569 0.1066 0.2695 -0.17052 2011 1 9 55570 0.1052 0.2692 -0.17179 2011 1 10 55571 0.1037 0.2689 -0.17306 2011 1 11 55572 0.1022 0.2687 -0.17430 2011 1 12 55573 0.1007 0.2684 -0.17546 2011 1 13 55574 0.0992 0.2682 -0.17653 2011 1 14 55575 0.0978 0.2680 -0.17746 2011 1 15 55576 0.0963 0.2678 -0.17829 2011 1 16 55577 0.0948 0.2677 -0.17904 2011 1 17 55578 0.0933 0.2676 -0.17975 2011 1 18 55579 0.0919 0.2675 -0.18050 2011 1 19 55580 0.0904 0.2674 -0.18141 2011 1 20 55581 0.0889 0.2673 -0.18254 2011 1 21 55582 0.0875 0.2673 -0.18389 2011 1 22 55583 0.0860 0.2673 -0.18544 2011 1 23 55584 0.0846 0.2673 -0.18713 2011 1 24 55585 0.0832 0.2673 -0.18887 2011 1 25 55586 0.0817 0.2674 -0.19053 2011 1 26 55587 0.0803 0.2674 -0.19199 2011 1 27 55588 0.0789 0.2675 -0.19318 2011 1 28 55589 0.0775 0.2677 -0.19411 2011 1 29 55590 0.0761 0.2678 -0.19490 2011 1 30 55591 0.0747 0.2680 -0.19560 2011 1 31 55592 0.0733 0.2682 -0.19624 2011 2 1 55593 0.0719 0.2684 -0.19686 2011 2 2 55594 0.0705 0.2686 -0.19756 2011 2 3 55595 0.0691 0.2689 -0.19839 2011 2 4 55596 0.0678 0.2691 -0.19938 2011 2 5 55597 0.0664 0.2694 -0.20045 2011 2 6 55598 0.0651 0.2698 -0.20156 2011 2 7 55599 0.0638 0.2701 -0.20266 2011 2 8 55600 0.0625 0.2704 -0.20371 2011 2 9 55601 0.0612 0.2708 -0.20465 2011 2 10 55602 0.0599 0.2712 -0.20549 2011 2 11 55603 0.0586 0.2716 -0.20622 2011 2 12 55604 0.0574 0.2721 -0.20692 2011 2 13 55605 0.0561 0.2725 -0.20763 2011 2 14 55606 0.0549 0.2730 -0.20837 2011 2 15 55607 0.0536 0.2735 -0.20922 2011 2 16 55608 0.0524 0.2740 -0.21027 2011 2 17 55609 0.0512 0.2746 -0.21155 2011 2 18 55610 0.0501 0.2751 -0.21308 2011 2 19 55611 0.0489 0.2757 -0.21485 2011 2 20 55612 0.0477 0.2763 -0.21673 2011 2 21 55613 0.0466 0.2769 -0.21855 2011 2 22 55614 0.0455 0.2775 -0.22018 2011 2 23 55615 0.0444 0.2781 -0.22156 2011 2 24 55616 0.0433 0.2788 -0.22267 2011 2 25 55617 0.0422 0.2795 -0.22357 2011 2 26 55618 0.0412 0.2802 -0.22437 2011 2 27 55619 0.0401 0.2809 -0.22516 2011 2 28 55620 0.0391 0.2816 -0.22599 2011 3 1 55621 0.0381 0.2823 -0.22687 2011 3 2 55622 0.0371 0.2831 -0.22782 2011 3 3 55623 0.0361 0.2838 -0.22888 2011 3 4 55624 0.0352 0.2846 -0.23005 2011 3 5 55625 0.0342 0.2854 -0.23130 2011 3 6 55626 0.0333 0.2862 -0.23252 2011 3 7 55627 0.0324 0.2871 -0.23367 2011 3 8 55628 0.0316 0.2879 -0.23473 2011 3 9 55629 0.0307 0.2887 -0.23572 2011 3 10 55630 0.0299 0.2896 -0.23665 2011 3 11 55631 0.0290 0.2905 -0.23747 2011 3 12 55632 0.0282 0.2914 -0.23818 2011 3 13 55633 0.0274 0.2923 -0.23887 2011 3 14 55634 0.0267 0.2932 -0.23956 2011 3 15 55635 0.0259 0.2941 -0.24032 2011 3 16 55636 0.0252 0.2950 -0.24121 2011 3 17 55637 0.0245 0.2960 -0.24234 2011 3 18 55638 0.0238 0.2969 -0.24379 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) 55254 -64.69 0.26 -7.67 0.34 55255 -64.25 0.21 -7.32 0.34 55256 -64.09 0.21 -6.97 0.34 55257 -64.14 0.19 -6.85 0.34 55258 -64.31 0.19 -6.90 0.34 55259 -64.56 0.19 -6.99 0.34 55260 -64.73 0.19 -7.14 0.34 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 55254 -0.127 0.103 -0.141 0.340 55255 -0.185 0.084 -0.153 0.340 55256 -0.206 0.084 -0.178 0.340 55257 -0.201 0.076 -0.174 0.340 55258 -0.188 0.076 -0.144 0.340 55259 -0.179 0.076 -0.108 0.340 55260 -0.177 0.076 -0.074 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.