********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 15 April 2010 Vol. XXIII No. 015 ______________________________________________________________________ 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 9 55295 -.06820 .00010 0.33715 .00009 0.007880 0.000004 10 4 10 55296 -.06842 .00010 0.33963 .00010 0.006512 0.000005 10 4 11 55297 -.06830 .00009 0.34226 .00009 0.005054 0.000005 10 4 12 55298 -.06813 .00009 0.34505 .00009 0.003514 0.000006 10 4 13 55299 -.06813 .00010 0.34797 .00009 0.001931 0.000006 10 4 14 55300 -.06840 .00010 0.35068 .00009 0.000356 0.000065 10 4 15 55301 -.06894 .00010 0.35318 .00009 -0.001137 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 = 0.0809 - 0.0777 cos A + 0.0950 sin A - 0.0673 cos C - 0.0796 sin C y = 0.3485 + 0.0856 cos A + 0.0694 sin A - 0.0796 cos C + 0.0673 sin C UT1-UTC = 0.0247 - 0.00087 (MJD - 55309) - (UT2-UT1) where A = 2*pi*(MJD-55301)/365.25 and C = 2*pi*(MJD-55301)/435. TAI-UTC(MJD 55302) = 34.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-55301)**0.80 S t = 0.00025 (MJD-55301)**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 16 55302 -0.0690 0.3554 -0.00250 2010 4 17 55303 -0.0691 0.3576 -0.00373 2010 4 18 55304 -0.0690 0.3598 -0.00486 2010 4 19 55305 -0.0687 0.3620 -0.00595 2010 4 20 55306 -0.0682 0.3643 -0.00706 2010 4 21 55307 -0.0677 0.3666 -0.00828 2010 4 22 55308 -0.0672 0.3689 -0.00966 2010 4 23 55309 -0.0666 0.3712 -0.01127 2010 4 24 55310 -0.0659 0.3735 -0.01308 2010 4 25 55311 -0.0652 0.3758 -0.01504 2010 4 26 55312 -0.0645 0.3780 -0.01702 2010 4 27 55313 -0.0637 0.3803 -0.01887 2010 4 28 55314 -0.0629 0.3825 -0.02047 2010 4 29 55315 -0.0621 0.3848 -0.02177 2010 4 30 55316 -0.0612 0.3870 -0.02280 2010 5 1 55317 -0.0603 0.3892 -0.02362 2010 5 2 55318 -0.0593 0.3914 -0.02434 2010 5 3 55319 -0.0584 0.3936 -0.02501 2010 5 4 55320 -0.0573 0.3957 -0.02572 2010 5 5 55321 -0.0563 0.3979 -0.02650 2010 5 6 55322 -0.0552 0.4000 -0.02740 2010 5 7 55323 -0.0541 0.4021 -0.02838 2010 5 8 55324 -0.0529 0.4042 -0.02941 2010 5 9 55325 -0.0517 0.4062 -0.03047 2010 5 10 55326 -0.0505 0.4083 -0.03150 2010 5 11 55327 -0.0493 0.4103 -0.03247 2010 5 12 55328 -0.0480 0.4123 -0.03332 2010 5 13 55329 -0.0467 0.4143 -0.03402 2010 5 14 55330 -0.0453 0.4163 -0.03455 2010 5 15 55331 -0.0440 0.4182 -0.03495 2010 5 16 55332 -0.0426 0.4201 -0.03528 2010 5 17 55333 -0.0411 0.4220 -0.03563 2010 5 18 55334 -0.0397 0.4239 -0.03609 2010 5 19 55335 -0.0382 0.4258 -0.03675 2010 5 20 55336 -0.0367 0.4276 -0.03763 2010 5 21 55337 -0.0351 0.4294 -0.03871 2010 5 22 55338 -0.0335 0.4312 -0.03991 2010 5 23 55339 -0.0319 0.4329 -0.04114 2010 5 24 55340 -0.0303 0.4347 -0.04229 2010 5 25 55341 -0.0287 0.4364 -0.04326 2010 5 26 55342 -0.0270 0.4380 -0.04400 2010 5 27 55343 -0.0253 0.4397 -0.04451 2010 5 28 55344 -0.0236 0.4413 -0.04482 2010 5 29 55345 -0.0218 0.4429 -0.04502 2010 5 30 55346 -0.0200 0.4444 -0.04518 2010 5 31 55347 -0.0183 0.4460 -0.04538 2010 6 1 55348 -0.0164 0.4475 -0.04567 2010 6 2 55349 -0.0146 0.4490 -0.04609 2010 6 3 55350 -0.0127 0.4504 -0.04662 2010 6 4 55351 -0.0109 0.4518 -0.04725 2010 6 5 55352 -0.0090 0.4532 -0.04794 2010 6 6 55353 -0.0070 0.4546 -0.04863 2010 6 7 55354 -0.0051 0.4559 -0.04930 2010 6 8 55355 -0.0032 0.4572 -0.04987 2010 6 9 55356 -0.0012 0.4585 -0.05032 2010 6 10 55357 0.0008 0.4597 -0.05061 2010 6 11 55358 0.0028 0.4609 -0.05074 2010 6 12 55359 0.0048 0.4621 -0.05077 2010 6 13 55360 0.0069 0.4632 -0.05076 2010 6 14 55361 0.0089 0.4643 -0.05084 2010 6 15 55362 0.0110 0.4654 -0.05108 2010 6 16 55363 0.0131 0.4665 -0.05154 2010 6 17 55364 0.0152 0.4675 -0.05220 2010 6 18 55365 0.0173 0.4684 -0.05298 2010 6 19 55366 0.0194 0.4694 -0.05377 2010 6 20 55367 0.0215 0.4703 -0.05445 2010 6 21 55368 0.0236 0.4712 -0.05494 2010 6 22 55369 0.0258 0.4720 -0.05520 2010 6 23 55370 0.0279 0.4728 -0.05522 2010 6 24 55371 0.0301 0.4736 -0.05507 2010 6 25 55372 0.0323 0.4744 -0.05478 2010 6 26 55373 0.0345 0.4751 -0.05446 2010 6 27 55374 0.0367 0.4757 -0.05415 2010 6 28 55375 0.0389 0.4764 -0.05393 2010 6 29 55376 0.0411 0.4770 -0.05381 2010 6 30 55377 0.0433 0.4775 -0.05381 2010 7 1 55378 0.0455 0.4781 -0.05392 2010 7 2 55379 0.0477 0.4786 -0.05409 2010 7 3 55380 0.0499 0.4790 -0.05430 2010 7 4 55381 0.0521 0.4795 -0.05449 2010 7 5 55382 0.0544 0.4799 -0.05461 2010 7 6 55383 0.0566 0.4802 -0.05463 2010 7 7 55384 0.0588 0.4806 -0.05452 2010 7 8 55385 0.0610 0.4809 -0.05428 2010 7 9 55386 0.0633 0.4811 -0.05392 2010 7 10 55387 0.0655 0.4813 -0.05351 2010 7 11 55388 0.0677 0.4815 -0.05316 2010 7 12 55389 0.0699 0.4817 -0.05297 2010 7 13 55390 0.0721 0.4818 -0.05301 2010 7 14 55391 0.0744 0.4819 -0.05330 2010 7 15 55392 0.0766 0.4819 -0.05377 2010 7 16 55393 0.0788 0.4820 -0.05430 2010 7 17 55394 0.0810 0.4819 -0.05476 2010 7 18 55395 0.0832 0.4819 -0.05503 2010 7 19 55396 0.0854 0.4818 -0.05506 2010 7 20 55397 0.0876 0.4817 -0.05484 2010 7 21 55398 0.0897 0.4815 -0.05442 2010 7 22 55399 0.0919 0.4813 -0.05386 2010 7 23 55400 0.0941 0.4811 -0.05325 2010 7 24 55401 0.0962 0.4809 -0.05266 2010 7 25 55402 0.0984 0.4806 -0.05215 2010 7 26 55403 0.1005 0.4803 -0.05175 2010 7 27 55404 0.1026 0.4799 -0.05149 2010 7 28 55405 0.1048 0.4795 -0.05135 2010 7 29 55406 0.1069 0.4791 -0.05131 2010 7 30 55407 0.1090 0.4787 -0.05133 2010 7 31 55408 0.1110 0.4782 -0.05136 2010 8 1 55409 0.1131 0.4777 -0.05135 2010 8 2 55410 0.1152 0.4771 -0.05129 2010 8 3 55411 0.1172 0.4765 -0.05113 2010 8 4 55412 0.1192 0.4759 -0.05085 2010 8 5 55413 0.1212 0.4753 -0.05046 2010 8 6 55414 0.1232 0.4746 -0.05003 2010 8 7 55415 0.1252 0.4739 -0.04964 2010 8 8 55416 0.1272 0.4732 -0.04938 2010 8 9 55417 0.1291 0.4724 -0.04937 2010 8 10 55418 0.1310 0.4716 -0.04964 2010 8 11 55419 0.1329 0.4708 -0.05018 2010 8 12 55420 0.1348 0.4699 -0.05089 2010 8 13 55421 0.1367 0.4691 -0.05160 2010 8 14 55422 0.1385 0.4682 -0.05218 2010 8 15 55423 0.1404 0.4672 -0.05252 2010 8 16 55424 0.1422 0.4663 -0.05260 2010 8 17 55425 0.1440 0.4653 -0.05246 2010 8 18 55426 0.1457 0.4643 -0.05216 2010 8 19 55427 0.1475 0.4632 -0.05180 2010 8 20 55428 0.1492 0.4621 -0.05146 2010 8 21 55429 0.1509 0.4610 -0.05119 2010 8 22 55430 0.1526 0.4599 -0.05104 2010 8 23 55431 0.1542 0.4588 -0.05104 2010 8 24 55432 0.1559 0.4576 -0.05119 2010 8 25 55433 0.1575 0.4564 -0.05145 2010 8 26 55434 0.1591 0.4552 -0.05180 2010 8 27 55435 0.1606 0.4539 -0.05218 2010 8 28 55436 0.1622 0.4527 -0.05254 2010 8 29 55437 0.1637 0.4514 -0.05284 2010 8 30 55438 0.1652 0.4501 -0.05306 2010 8 31 55439 0.1666 0.4487 -0.05316 2010 9 1 55440 0.1681 0.4474 -0.05318 2010 9 2 55441 0.1695 0.4460 -0.05314 2010 9 3 55442 0.1708 0.4446 -0.05311 2010 9 4 55443 0.1722 0.4432 -0.05319 2010 9 5 55444 0.1735 0.4417 -0.05348 2010 9 6 55445 0.1748 0.4403 -0.05405 2010 9 7 55446 0.1761 0.4388 -0.05492 2010 9 8 55447 0.1773 0.4373 -0.05604 2010 9 9 55448 0.1785 0.4358 -0.05727 2010 9 10 55449 0.1797 0.4343 -0.05846 2010 9 11 55450 0.1809 0.4327 -0.05947 2010 9 12 55451 0.1820 0.4312 -0.06021 2010 9 13 55452 0.1831 0.4296 -0.06070 2010 9 14 55453 0.1841 0.4280 -0.06100 2010 9 15 55454 0.1852 0.4264 -0.06120 2010 9 16 55455 0.1862 0.4247 -0.06139 2010 9 17 55456 0.1872 0.4231 -0.06164 2010 9 18 55457 0.1881 0.4214 -0.06200 2010 9 19 55458 0.1890 0.4198 -0.06249 2010 9 20 55459 0.1899 0.4181 -0.06312 2010 9 21 55460 0.1907 0.4164 -0.06389 2010 9 22 55461 0.1916 0.4147 -0.06474 2010 9 23 55462 0.1924 0.4130 -0.06564 2010 9 24 55463 0.1931 0.4112 -0.06654 2010 9 25 55464 0.1938 0.4095 -0.06738 2010 9 26 55465 0.1945 0.4077 -0.06813 2010 9 27 55466 0.1952 0.4060 -0.06877 2010 9 28 55467 0.1958 0.4042 -0.06931 2010 9 29 55468 0.1964 0.4024 -0.06977 2010 9 30 55469 0.1970 0.4006 -0.07021 2010 10 1 55470 0.1975 0.3988 -0.07072 2010 10 2 55471 0.1981 0.3970 -0.07138 2010 10 3 55472 0.1985 0.3952 -0.07227 2010 10 4 55473 0.1990 0.3934 -0.07344 2010 10 5 55474 0.1994 0.3916 -0.07486 2010 10 6 55475 0.1998 0.3898 -0.07646 2010 10 7 55476 0.2001 0.3880 -0.07810 2010 10 8 55477 0.2004 0.3861 -0.07962 2010 10 9 55478 0.2007 0.3843 -0.08092 2010 10 10 55479 0.2009 0.3825 -0.08195 2010 10 11 55480 0.2012 0.3806 -0.08274 2010 10 12 55481 0.2014 0.3788 -0.08336 2010 10 13 55482 0.2015 0.3769 -0.08393 2010 10 14 55483 0.2016 0.3751 -0.08450 2010 10 15 55484 0.2017 0.3732 -0.08515 2010 10 16 55485 0.2018 0.3714 -0.08589 2010 10 17 55486 0.2018 0.3695 -0.08673 2010 10 18 55487 0.2018 0.3677 -0.08766 2010 10 19 55488 0.2018 0.3659 -0.08866 2010 10 20 55489 0.2017 0.3640 -0.08966 2010 10 21 55490 0.2016 0.3622 -0.09064 2010 10 22 55491 0.2015 0.3603 -0.09153 2010 10 23 55492 0.2013 0.3585 -0.09231 2010 10 24 55493 0.2011 0.3567 -0.09296 2010 10 25 55494 0.2009 0.3549 -0.09347 2010 10 26 55495 0.2007 0.3531 -0.09389 2010 10 27 55496 0.2004 0.3512 -0.09425 2010 10 28 55497 0.2001 0.3494 -0.09465 2010 10 29 55498 0.1997 0.3476 -0.09518 2010 10 30 55499 0.1994 0.3458 -0.09590 2010 10 31 55500 0.1990 0.3441 -0.09689 2010 11 1 55501 0.1985 0.3423 -0.09812 2010 11 2 55502 0.1981 0.3405 -0.09956 2010 11 3 55503 0.1976 0.3387 -0.10109 2010 11 4 55504 0.1971 0.3370 -0.10257 2010 11 5 55505 0.1965 0.3352 -0.10391 2010 11 6 55506 0.1960 0.3335 -0.10501 2010 11 7 55507 0.1954 0.3318 -0.10589 2010 11 8 55508 0.1947 0.3301 -0.10660 2010 11 9 55509 0.1941 0.3284 -0.10724 2010 11 10 55510 0.1934 0.3267 -0.10790 2010 11 11 55511 0.1927 0.3250 -0.10864 2010 11 12 55512 0.1920 0.3233 -0.10950 2010 11 13 55513 0.1912 0.3217 -0.11048 2010 11 14 55514 0.1904 0.3200 -0.11156 2010 11 15 55515 0.1896 0.3184 -0.11271 2010 11 16 55516 0.1888 0.3168 -0.11386 2010 11 17 55517 0.1879 0.3152 -0.11497 2010 11 18 55518 0.1870 0.3136 -0.11601 2010 11 19 55519 0.1861 0.3121 -0.11697 2010 11 20 55520 0.1852 0.3105 -0.11784 2010 11 21 55521 0.1842 0.3090 -0.11858 2010 11 22 55522 0.1832 0.3075 -0.11919 2010 11 23 55523 0.1822 0.3059 -0.11976 2010 11 24 55524 0.1812 0.3045 -0.12035 2010 11 25 55525 0.1802 0.3030 -0.12103 2010 11 26 55526 0.1791 0.3015 -0.12184 2010 11 27 55527 0.1780 0.3001 -0.12287 2010 11 28 55528 0.1769 0.2987 -0.12410 2010 11 29 55529 0.1758 0.2973 -0.12549 2010 11 30 55530 0.1746 0.2959 -0.12698 2010 12 1 55531 0.1734 0.2946 -0.12846 2010 12 2 55532 0.1722 0.2932 -0.12983 2010 12 3 55533 0.1710 0.2919 -0.13097 2010 12 4 55534 0.1698 0.2906 -0.13189 2010 12 5 55535 0.1685 0.2893 -0.13262 2010 12 6 55536 0.1673 0.2881 -0.13327 2010 12 7 55537 0.1660 0.2868 -0.13389 2010 12 8 55538 0.1647 0.2856 -0.13457 2010 12 9 55539 0.1634 0.2844 -0.13534 2010 12 10 55540 0.1620 0.2832 -0.13622 2010 12 11 55541 0.1607 0.2821 -0.13719 2010 12 12 55542 0.1593 0.2810 -0.13825 2010 12 13 55543 0.1579 0.2799 -0.13936 2010 12 14 55544 0.1566 0.2788 -0.14049 2010 12 15 55545 0.1551 0.2777 -0.14162 2010 12 16 55546 0.1537 0.2767 -0.14270 2010 12 17 55547 0.1523 0.2757 -0.14369 2010 12 18 55548 0.1508 0.2747 -0.14453 2010 12 19 55549 0.1494 0.2737 -0.14522 2010 12 20 55550 0.1479 0.2728 -0.14579 2010 12 21 55551 0.1464 0.2718 -0.14633 2010 12 22 55552 0.1449 0.2709 -0.14690 2010 12 23 55553 0.1434 0.2701 -0.14760 2010 12 24 55554 0.1419 0.2692 -0.14852 2010 12 25 55555 0.1404 0.2684 -0.14965 2010 12 26 55556 0.1388 0.2676 -0.15096 2010 12 27 55557 0.1373 0.2668 -0.15236 2010 12 28 55558 0.1357 0.2661 -0.15373 2010 12 29 55559 0.1342 0.2654 -0.15498 2010 12 30 55560 0.1326 0.2647 -0.15607 2010 12 31 55561 0.1311 0.2640 -0.15696 2011 1 1 55562 0.1295 0.2633 -0.15769 2011 1 2 55563 0.1279 0.2627 -0.15833 2011 1 3 55564 0.1263 0.2621 -0.15894 2011 1 4 55565 0.1247 0.2615 -0.15959 2011 1 5 55566 0.1231 0.2610 -0.16032 2011 1 6 55567 0.1215 0.2605 -0.16113 2011 1 7 55568 0.1199 0.2600 -0.16205 2011 1 8 55569 0.1183 0.2595 -0.16308 2011 1 9 55570 0.1167 0.2591 -0.16414 2011 1 10 55571 0.1151 0.2586 -0.16521 2011 1 11 55572 0.1134 0.2583 -0.16630 2011 1 12 55573 0.1118 0.2579 -0.16732 2011 1 13 55574 0.1102 0.2575 -0.16821 2011 1 14 55575 0.1086 0.2572 -0.16901 2011 1 15 55576 0.1070 0.2569 -0.16973 2011 1 16 55577 0.1053 0.2567 -0.17040 2011 1 17 55578 0.1037 0.2564 -0.17104 2011 1 18 55579 0.1021 0.2562 -0.17173 2011 1 19 55580 0.1005 0.2560 -0.17248 2011 1 20 55581 0.0989 0.2559 -0.17340 2011 1 21 55582 0.0973 0.2557 -0.17452 2011 1 22 55583 0.0957 0.2556 -0.17584 2011 1 23 55584 0.0941 0.2555 -0.17731 2011 1 24 55585 0.0925 0.2555 -0.17886 2011 1 25 55586 0.0909 0.2554 -0.18034 2011 1 26 55587 0.0893 0.2554 -0.18164 2011 1 27 55588 0.0877 0.2554 -0.18267 2011 1 28 55589 0.0861 0.2555 -0.18343 2011 1 29 55590 0.0846 0.2555 -0.18399 2011 1 30 55591 0.0830 0.2556 -0.18446 2011 1 31 55592 0.0814 0.2557 -0.18492 2011 2 1 55593 0.0799 0.2559 -0.18542 2011 2 2 55594 0.0784 0.2560 -0.18607 2011 2 3 55595 0.0768 0.2562 -0.18687 2011 2 4 55596 0.0753 0.2564 -0.18776 2011 2 5 55597 0.0738 0.2567 -0.18877 2011 2 6 55598 0.0723 0.2569 -0.18985 2011 2 7 55599 0.0708 0.2572 -0.19091 2011 2 8 55600 0.0693 0.2575 -0.19195 2011 2 9 55601 0.0678 0.2578 -0.19292 2011 2 10 55602 0.0664 0.2582 -0.19381 2011 2 11 55603 0.0649 0.2586 -0.19459 2011 2 12 55604 0.0635 0.2590 -0.19524 2011 2 13 55605 0.0620 0.2594 -0.19582 2011 2 14 55606 0.0606 0.2598 -0.19643 2011 2 15 55607 0.0592 0.2603 -0.19716 2011 2 16 55608 0.0578 0.2608 -0.19808 2011 2 17 55609 0.0564 0.2613 -0.19924 2011 2 18 55610 0.0551 0.2618 -0.20068 2011 2 19 55611 0.0537 0.2623 -0.20234 2011 2 20 55612 0.0524 0.2629 -0.20413 2011 2 21 55613 0.0511 0.2635 -0.20597 2011 2 22 55614 0.0498 0.2641 -0.20770 2011 2 23 55615 0.0485 0.2647 -0.20925 2011 2 24 55616 0.0472 0.2654 -0.21060 2011 2 25 55617 0.0459 0.2660 -0.21179 2011 2 26 55618 0.0447 0.2667 -0.21288 2011 2 27 55619 0.0435 0.2674 -0.21397 2011 2 28 55620 0.0423 0.2682 -0.21511 2011 3 1 55621 0.0411 0.2689 -0.21632 2011 3 2 55622 0.0399 0.2697 -0.21766 2011 3 3 55623 0.0388 0.2704 -0.21916 2011 3 4 55624 0.0376 0.2712 -0.22080 2011 3 5 55625 0.0365 0.2720 -0.22249 2011 3 6 55626 0.0354 0.2729 -0.22416 2011 3 7 55627 0.0343 0.2737 -0.22578 2011 3 8 55628 0.0332 0.2746 -0.22731 2011 3 9 55629 0.0322 0.2754 -0.22873 2011 3 10 55630 0.0312 0.2763 -0.23004 2011 3 11 55631 0.0302 0.2773 -0.23123 2011 3 12 55632 0.0292 0.2782 -0.23238 2011 3 13 55633 0.0282 0.2791 -0.23350 2011 3 14 55634 0.0273 0.2801 -0.23468 2011 3 15 55635 0.0263 0.2810 -0.23600 2011 3 16 55636 0.0254 0.2820 -0.23757 2011 3 17 55637 0.0245 0.2830 -0.23943 2011 3 18 55638 0.0237 0.2840 -0.24150 2011 3 19 55639 0.0228 0.2850 -0.24372 2011 3 20 55640 0.0220 0.2861 -0.24598 2011 3 21 55641 0.0212 0.2871 -0.24816 2011 3 22 55642 0.0204 0.2882 -0.25015 2011 3 23 55643 0.0197 0.2892 -0.25188 2011 3 24 55644 0.0189 0.2903 -0.25334 2011 3 25 55645 0.0182 0.2914 -0.25461 2011 3 26 55646 0.0175 0.2925 -0.25582 2011 3 27 55647 0.0168 0.2936 -0.25703 2011 3 28 55648 0.0162 0.2947 -0.25826 2011 3 29 55649 0.0155 0.2958 -0.25951 2011 3 30 55650 0.0149 0.2970 -0.26080 2011 3 31 55651 0.0144 0.2981 -0.26220 2011 4 1 55652 0.0138 0.2993 -0.26369 2011 4 2 55653 0.0132 0.3004 -0.26519 2011 4 3 55654 0.0127 0.3016 -0.26664 2011 4 4 55655 0.0122 0.3028 -0.26802 2011 4 5 55656 0.0118 0.3039 -0.26928 2011 4 6 55657 0.0113 0.3051 -0.27041 2011 4 7 55658 0.0109 0.3063 -0.27141 2011 4 8 55659 0.0105 0.3075 -0.27234 2011 4 9 55660 0.0101 0.3087 -0.27327 2011 4 10 55661 0.0097 0.3099 -0.27428 2011 4 11 55662 0.0094 0.3111 -0.27539 2011 4 12 55663 0.0091 0.3124 -0.27668 2011 4 13 55664 0.0088 0.3136 -0.27819 2011 4 14 55665 0.0085 0.3148 -0.27992 2011 4 15 55666 0.0082 0.3160 -0.28183 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) 55279 -63.90 0.16 -8.81 0.12 55280 -63.81 0.16 -9.27 0.12 55281 -63.48 0.16 -9.59 0.12 55282 -63.12 0.10 -9.54 0.11 55283 -62.97 0.13 -9.14 0.10 55284 -63.06 0.13 -8.71 0.10 55285 -63.26 0.15 -8.51 0.34 55286 -63.46 0.15 -8.60 0.34 55287 -63.60 0.15 -8.82 0.34 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 55279 -0.139 0.064 -0.081 0.120 55280 -0.143 0.064 -0.142 0.120 55281 -0.152 0.064 -0.181 0.120 55282 -0.172 0.040 -0.204 0.110 55283 -0.202 0.052 -0.216 0.100 55284 -0.221 0.052 -0.231 0.100 55285 -0.222 0.060 -0.205 0.340 55286 -0.215 0.060 -0.166 0.340 55287 -0.211 0.060 -0.122 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.