********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 14 April 2011 Vol. XXIV 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 = -0.2 seconds beginning 6 January 2011 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 11 4 8 55659 -.04288 .00009 0.29089 .00009 -0.219989 0.000013 11 4 9 55660 -.04322 .00010 0.29338 .00009 -0.220729 0.000012 11 4 10 55661 -.04330 .00010 0.29568 .00009 -0.221498 0.000010 11 4 11 55662 -.04353 .00010 0.29768 .00009 -0.222342 0.000012 11 4 12 55663 -.04384 .00010 0.29965 .00009 -0.223319 0.000012 11 4 13 55664 -.04400 .00010 0.30181 .00009 -0.224473 0.000012 11 4 14 55665 -.04419 .00010 0.30425 .00010 -0.225820 0.000011 _______________________________________________________________________ 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 = 0.0913 - 0.1106 cos A + 0.0159 sin A - 0.0254 cos C - 0.0384 sin C y = 0.3272 + 0.0166 cos A + 0.1008 sin A - 0.0384 cos C + 0.0254 sin C UT1-UTC = -0.2004 - 0.00064 (MJD - 55673) - (UT2-UT1) where A = 2*pi*(MJD-55665)/365.25 and C = 2*pi*(MJD-55665)/435. TAI-UTC(MJD 55666) = 34.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-55665)**0.80 S t = 0.00025 (MJD-55665)**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) 2011 4 15 55666 -0.0444 0.3064 -0.22738 2011 4 16 55667 -0.0447 0.3087 -0.22905 2011 4 17 55668 -0.0449 0.3109 -0.23069 2011 4 18 55669 -0.0450 0.3129 -0.23219 2011 4 19 55670 -0.0451 0.3149 -0.23348 2011 4 20 55671 -0.0450 0.3169 -0.23451 2011 4 21 55672 -0.0450 0.3188 -0.23535 2011 4 22 55673 -0.0448 0.3208 -0.23609 2011 4 23 55674 -0.0447 0.3228 -0.23681 2011 4 24 55675 -0.0445 0.3247 -0.23758 2011 4 25 55676 -0.0443 0.3266 -0.23841 2011 4 26 55677 -0.0441 0.3286 -0.23930 2011 4 27 55678 -0.0438 0.3304 -0.24025 2011 4 28 55679 -0.0435 0.3323 -0.24126 2011 4 29 55680 -0.0431 0.3342 -0.24230 2011 4 30 55681 -0.0427 0.3361 -0.24333 2011 5 1 55682 -0.0423 0.3379 -0.24431 2011 5 2 55683 -0.0419 0.3398 -0.24521 2011 5 3 55684 -0.0414 0.3416 -0.24602 2011 5 4 55685 -0.0409 0.3434 -0.24672 2011 5 5 55686 -0.0403 0.3452 -0.24733 2011 5 6 55687 -0.0398 0.3471 -0.24787 2011 5 7 55688 -0.0392 0.3488 -0.24839 2011 5 8 55689 -0.0386 0.3506 -0.24894 2011 5 9 55690 -0.0379 0.3524 -0.24959 2011 5 10 55691 -0.0372 0.3542 -0.25039 2011 5 11 55692 -0.0365 0.3559 -0.25137 2011 5 12 55693 -0.0358 0.3577 -0.25252 2011 5 13 55694 -0.0350 0.3594 -0.25378 2011 5 14 55695 -0.0342 0.3611 -0.25505 2011 5 15 55696 -0.0334 0.3628 -0.25622 2011 5 16 55697 -0.0326 0.3645 -0.25719 2011 5 17 55698 -0.0317 0.3662 -0.25791 2011 5 18 55699 -0.0308 0.3679 -0.25841 2011 5 19 55700 -0.0299 0.3695 -0.25875 2011 5 20 55701 -0.0289 0.3712 -0.25904 2011 5 21 55702 -0.0280 0.3728 -0.25934 2011 5 22 55703 -0.0270 0.3744 -0.25973 2011 5 23 55704 -0.0260 0.3760 -0.26021 2011 5 24 55705 -0.0249 0.3776 -0.26076 2011 5 25 55706 -0.0239 0.3791 -0.26136 2011 5 26 55707 -0.0228 0.3807 -0.26196 2011 5 27 55708 -0.0217 0.3822 -0.26252 2011 5 28 55709 -0.0205 0.3837 -0.26300 2011 5 29 55710 -0.0194 0.3852 -0.26337 2011 5 30 55711 -0.0182 0.3867 -0.26360 2011 5 31 55712 -0.0170 0.3881 -0.26370 2011 6 1 55713 -0.0158 0.3896 -0.26369 2011 6 2 55714 -0.0146 0.3910 -0.26359 2011 6 3 55715 -0.0133 0.3924 -0.26348 2011 6 4 55716 -0.0120 0.3938 -0.26341 2011 6 5 55717 -0.0107 0.3952 -0.26345 2011 6 6 55718 -0.0094 0.3965 -0.26364 2011 6 7 55719 -0.0081 0.3978 -0.26402 2011 6 8 55720 -0.0067 0.3991 -0.26456 2011 6 9 55721 -0.0054 0.4004 -0.26520 2011 6 10 55722 -0.0040 0.4017 -0.26586 2011 6 11 55723 -0.0026 0.4029 -0.26645 2011 6 12 55724 -0.0012 0.4041 -0.26686 2011 6 13 55725 0.0002 0.4053 -0.26705 2011 6 14 55726 0.0017 0.4065 -0.26702 2011 6 15 55727 0.0031 0.4077 -0.26683 2011 6 16 55728 0.0046 0.4088 -0.26655 2011 6 17 55729 0.0061 0.4099 -0.26629 2011 6 18 55730 0.0076 0.4110 -0.26610 2011 6 19 55731 0.0091 0.4121 -0.26600 2011 6 20 55732 0.0106 0.4131 -0.26600 2011 6 21 55733 0.0122 0.4141 -0.26605 2011 6 22 55734 0.0137 0.4151 -0.26613 2011 6 23 55735 0.0153 0.4161 -0.26617 2011 6 24 55736 0.0169 0.4170 -0.26616 2011 6 25 55737 0.0184 0.4180 -0.26604 2011 6 26 55738 0.0200 0.4189 -0.26580 2011 6 27 55739 0.0216 0.4198 -0.26543 2011 6 28 55740 0.0233 0.4206 -0.26494 2011 6 29 55741 0.0249 0.4214 -0.26438 2011 6 30 55742 0.0265 0.4222 -0.26378 2011 7 1 55743 0.0281 0.4230 -0.26322 2011 7 2 55744 0.0298 0.4238 -0.26277 2011 7 3 55745 0.0314 0.4245 -0.26249 2011 7 4 55746 0.0331 0.4252 -0.26242 2011 7 5 55747 0.0347 0.4259 -0.26254 2011 7 6 55748 0.0364 0.4266 -0.26278 2011 7 7 55749 0.0381 0.4272 -0.26306 2011 7 8 55750 0.0398 0.4278 -0.26326 2011 7 9 55751 0.0414 0.4284 -0.26332 2011 7 10 55752 0.0431 0.4290 -0.26318 2011 7 11 55753 0.0448 0.4295 -0.26284 2011 7 12 55754 0.0465 0.4300 -0.26235 2011 7 13 55755 0.0482 0.4305 -0.26177 2011 7 14 55756 0.0499 0.4309 -0.26119 2011 7 15 55757 0.0516 0.4314 -0.26068 2011 7 16 55758 0.0533 0.4318 -0.26029 2011 7 17 55759 0.0550 0.4322 -0.26003 2011 7 18 55760 0.0567 0.4325 -0.25986 2011 7 19 55761 0.0584 0.4329 -0.25975 2011 7 20 55762 0.0600 0.4332 -0.25965 2011 7 21 55763 0.0617 0.4335 -0.25951 2011 7 22 55764 0.0634 0.4337 -0.25930 2011 7 23 55765 0.0651 0.4339 -0.25899 2011 7 24 55766 0.0668 0.4342 -0.25857 2011 7 25 55767 0.0685 0.4343 -0.25805 2011 7 26 55768 0.0702 0.4345 -0.25745 2011 7 27 55769 0.0718 0.4346 -0.25682 2011 7 28 55770 0.0735 0.4347 -0.25622 2011 7 29 55771 0.0752 0.4348 -0.25573 2011 7 30 55772 0.0768 0.4349 -0.25542 2011 7 31 55773 0.0785 0.4349 -0.25534 2011 8 1 55774 0.0802 0.4349 -0.25547 2011 8 2 55775 0.0818 0.4349 -0.25578 2011 8 3 55776 0.0834 0.4349 -0.25617 2011 8 4 55777 0.0851 0.4348 -0.25653 2011 8 5 55778 0.0867 0.4347 -0.25675 2011 8 6 55779 0.0883 0.4346 -0.25676 2011 8 7 55780 0.0899 0.4345 -0.25657 2011 8 8 55781 0.0915 0.4343 -0.25622 2011 8 9 55782 0.0931 0.4342 -0.25577 2011 8 10 55783 0.0947 0.4340 -0.25531 2011 8 11 55784 0.0963 0.4337 -0.25492 2011 8 12 55785 0.0978 0.4335 -0.25463 2011 8 13 55786 0.0994 0.4332 -0.25448 2011 8 14 55787 0.1009 0.4329 -0.25445 2011 8 15 55788 0.1024 0.4326 -0.25451 2011 8 16 55789 0.1039 0.4323 -0.25461 2011 8 17 55790 0.1054 0.4319 -0.25471 2011 8 18 55791 0.1069 0.4315 -0.25475 2011 8 19 55792 0.1084 0.4311 -0.25471 2011 8 20 55793 0.1099 0.4307 -0.25457 2011 8 21 55794 0.1113 0.4303 -0.25433 2011 8 22 55795 0.1128 0.4298 -0.25401 2011 8 23 55796 0.1142 0.4293 -0.25365 2011 8 24 55797 0.1156 0.4288 -0.25330 2011 8 25 55798 0.1170 0.4283 -0.25303 2011 8 26 55799 0.1184 0.4277 -0.25293 2011 8 27 55800 0.1198 0.4272 -0.25304 2011 8 28 55801 0.1211 0.4266 -0.25342 2011 8 29 55802 0.1225 0.4260 -0.25404 2011 8 30 55803 0.1238 0.4254 -0.25481 2011 8 31 55804 0.1251 0.4247 -0.25563 2011 9 1 55805 0.1264 0.4241 -0.25636 2011 9 2 55806 0.1276 0.4234 -0.25689 2011 9 3 55807 0.1289 0.4227 -0.25721 2011 9 4 55808 0.1301 0.4220 -0.25733 2011 9 5 55809 0.1314 0.4213 -0.25734 2011 9 6 55810 0.1326 0.4205 -0.25731 2011 9 7 55811 0.1337 0.4197 -0.25734 2011 9 8 55812 0.1349 0.4190 -0.25747 2011 9 9 55813 0.1361 0.4182 -0.25773 2011 9 10 55814 0.1372 0.4174 -0.25812 2011 9 11 55815 0.1383 0.4165 -0.25861 2011 9 12 55816 0.1394 0.4157 -0.25916 2011 9 13 55817 0.1405 0.4148 -0.25973 2011 9 14 55818 0.1415 0.4140 -0.26027 2011 9 15 55819 0.1426 0.4131 -0.26074 2011 9 16 55820 0.1436 0.4122 -0.26112 2011 9 17 55821 0.1446 0.4113 -0.26140 2011 9 18 55822 0.1456 0.4103 -0.26160 2011 9 19 55823 0.1465 0.4094 -0.26175 2011 9 20 55824 0.1475 0.4084 -0.26189 2011 9 21 55825 0.1484 0.4075 -0.26209 2011 9 22 55826 0.1493 0.4065 -0.26241 2011 9 23 55827 0.1502 0.4055 -0.26293 2011 9 24 55828 0.1510 0.4045 -0.26369 2011 9 25 55829 0.1519 0.4035 -0.26471 2011 9 26 55830 0.1527 0.4024 -0.26594 2011 9 27 55831 0.1535 0.4014 -0.26730 2011 9 28 55832 0.1542 0.4004 -0.26863 2011 9 29 55833 0.1550 0.3993 -0.26983 2011 9 30 55834 0.1557 0.3982 -0.27080 2011 10 1 55835 0.1564 0.3972 -0.27155 2011 10 2 55836 0.1571 0.3961 -0.27213 2011 10 3 55837 0.1578 0.3950 -0.27264 2011 10 4 55838 0.1584 0.3939 -0.27316 2011 10 5 55839 0.1591 0.3928 -0.27375 2011 10 6 55840 0.1597 0.3916 -0.27446 2011 10 7 55841 0.1603 0.3905 -0.27528 2011 10 8 55842 0.1608 0.3894 -0.27618 2011 10 9 55843 0.1614 0.3882 -0.27715 2011 10 10 55844 0.1619 0.3871 -0.27812 2011 10 11 55845 0.1624 0.3860 -0.27907 2011 10 12 55846 0.1629 0.3848 -0.27995 2011 10 13 55847 0.1633 0.3836 -0.28072 2011 10 14 55848 0.1637 0.3825 -0.28139 2011 10 15 55849 0.1642 0.3813 -0.28196 2011 10 16 55850 0.1645 0.3801 -0.28246 2011 10 17 55851 0.1649 0.3789 -0.28292 2011 10 18 55852 0.1653 0.3777 -0.28340 2011 10 19 55853 0.1656 0.3765 -0.28397 2011 10 20 55854 0.1659 0.3754 -0.28470 2011 10 21 55855 0.1662 0.3742 -0.28564 2011 10 22 55856 0.1664 0.3730 -0.28684 2011 10 23 55857 0.1667 0.3718 -0.28829 2011 10 24 55858 0.1669 0.3706 -0.28993 2011 10 25 55859 0.1671 0.3693 -0.29166 2011 10 26 55860 0.1673 0.3681 -0.29333 2011 10 27 55861 0.1674 0.3669 -0.29485 2011 10 28 55862 0.1676 0.3657 -0.29615 2011 10 29 55863 0.1677 0.3645 -0.29726 2011 10 30 55864 0.1678 0.3633 -0.29824 2011 10 31 55865 0.1679 0.3621 -0.29920 2011 11 1 55866 0.1679 0.3609 -0.30022 2011 11 2 55867 0.1680 0.3597 -0.30133 2011 11 3 55868 0.1680 0.3585 -0.30255 2011 11 4 55869 0.1680 0.3573 -0.30386 2011 11 5 55870 0.1680 0.3561 -0.30521 2011 11 6 55871 0.1679 0.3549 -0.30656 2011 11 7 55872 0.1679 0.3537 -0.30785 2011 11 8 55873 0.1678 0.3525 -0.30903 2011 11 9 55874 0.1677 0.3513 -0.31006 2011 11 10 55875 0.1676 0.3501 -0.31090 2011 11 11 55876 0.1674 0.3489 -0.31157 2011 11 12 55877 0.1673 0.3477 -0.31208 2011 11 13 55878 0.1671 0.3465 -0.31250 2011 11 14 55879 0.1669 0.3454 -0.31288 2011 11 15 55880 0.1667 0.3442 -0.31330 2011 11 16 55881 0.1665 0.3430 -0.31382 2011 11 17 55882 0.1662 0.3419 -0.31449 2011 11 18 55883 0.1660 0.3407 -0.31532 2011 11 19 55884 0.1657 0.3396 -0.31631 2011 11 20 55885 0.1654 0.3384 -0.31741 2011 11 21 55886 0.1651 0.3373 -0.31858 2011 11 22 55887 0.1648 0.3361 -0.31976 2011 11 23 55888 0.1644 0.3350 -0.32084 2011 11 24 55889 0.1641 0.3339 -0.32174 2011 11 25 55890 0.1637 0.3328 -0.32243 2011 11 26 55891 0.1633 0.3317 -0.32299 2011 11 27 55892 0.1629 0.3306 -0.32351 2011 11 28 55893 0.1625 0.3295 -0.32405 2011 11 29 55894 0.1620 0.3284 -0.32471 2011 11 30 55895 0.1616 0.3273 -0.32552 2011 12 1 55896 0.1611 0.3263 -0.32641 2011 12 2 55897 0.1606 0.3252 -0.32736 2011 12 3 55898 0.1601 0.3242 -0.32837 2011 12 4 55899 0.1596 0.3231 -0.32933 2011 12 5 55900 0.1591 0.3221 -0.33021 2011 12 6 55901 0.1586 0.3211 -0.33096 2011 12 7 55902 0.1580 0.3200 -0.33159 2011 12 8 55903 0.1574 0.3190 -0.33210 2011 12 9 55904 0.1569 0.3180 -0.33257 2011 12 10 55905 0.1563 0.3171 -0.33305 2011 12 11 55906 0.1557 0.3161 -0.33349 2011 12 12 55907 0.1551 0.3151 -0.33400 2011 12 13 55908 0.1545 0.3142 -0.33463 2011 12 14 55909 0.1538 0.3132 -0.33537 2011 12 15 55910 0.1532 0.3123 -0.33626 2011 12 16 55911 0.1525 0.3114 -0.33732 2011 12 17 55912 0.1519 0.3105 -0.33858 2011 12 18 55913 0.1512 0.3096 -0.33988 2011 12 19 55914 0.1505 0.3087 -0.34112 2011 12 20 55915 0.1498 0.3078 -0.34232 2011 12 21 55916 0.1491 0.3069 -0.34333 2011 12 22 55917 0.1484 0.3061 -0.34412 2011 12 23 55918 0.1477 0.3052 -0.34477 2011 12 24 55919 0.1470 0.3044 -0.34536 2011 12 25 55920 0.1462 0.3036 -0.34594 2011 12 26 55921 0.1455 0.3028 -0.34664 2011 12 27 55922 0.1447 0.3020 -0.34751 2011 12 28 55923 0.1440 0.3012 -0.34849 2011 12 29 55924 0.1432 0.3004 -0.34953 2011 12 30 55925 0.1425 0.2997 -0.35057 2011 12 31 55926 0.1417 0.2989 -0.35157 2012 1 1 55927 0.1409 0.2982 -0.35252 2012 1 2 55928 0.1401 0.2975 -0.35340 2012 1 3 55929 0.1393 0.2968 -0.35412 2012 1 4 55930 0.1385 0.2961 -0.35473 2012 1 5 55931 0.1377 0.2954 -0.35521 2012 1 6 55932 0.1369 0.2947 -0.35561 2012 1 7 55933 0.1361 0.2941 -0.35598 2012 1 8 55934 0.1353 0.2934 -0.35633 2012 1 9 55935 0.1345 0.2928 -0.35672 2012 1 10 55936 0.1336 0.2922 -0.35719 2012 1 11 55937 0.1328 0.2916 -0.35783 2012 1 12 55938 0.1320 0.2910 -0.35866 2012 1 13 55939 0.1311 0.2904 -0.35968 2012 1 14 55940 0.1303 0.2898 -0.36080 2012 1 15 55941 0.1295 0.2893 -0.36195 2012 1 16 55942 0.1286 0.2887 -0.36301 2012 1 17 55943 0.1278 0.2882 -0.36387 2012 1 18 55944 0.1270 0.2877 -0.36452 2012 1 19 55945 0.1261 0.2872 -0.36501 2012 1 20 55946 0.1253 0.2867 -0.36545 2012 1 21 55947 0.1244 0.2862 -0.36586 2012 1 22 55948 0.1236 0.2858 -0.36642 2012 1 23 55949 0.1227 0.2853 -0.36718 2012 1 24 55950 0.1219 0.2849 -0.36808 2012 1 25 55951 0.1211 0.2845 -0.36911 2012 1 26 55952 0.1202 0.2841 -0.37010 2012 1 27 55953 0.1194 0.2837 -0.37104 2012 1 28 55954 0.1185 0.2833 -0.37185 2012 1 29 55955 0.1177 0.2829 -0.37257 2012 1 30 55956 0.1169 0.2825 -0.37320 2012 1 31 55957 0.1160 0.2822 -0.37373 2012 2 1 55958 0.1152 0.2819 -0.37420 2012 2 2 55959 0.1144 0.2815 -0.37459 2012 2 3 55960 0.1135 0.2812 -0.37494 2012 2 4 55961 0.1127 0.2809 -0.37528 2012 2 5 55962 0.1119 0.2807 -0.37569 2012 2 6 55963 0.1111 0.2804 -0.37626 2012 2 7 55964 0.1103 0.2801 -0.37706 2012 2 8 55965 0.1095 0.2799 -0.37810 2012 2 9 55966 0.1086 0.2796 -0.37936 2012 2 10 55967 0.1078 0.2794 -0.38074 2012 2 11 55968 0.1070 0.2792 -0.38212 2012 2 12 55969 0.1063 0.2790 -0.38348 2012 2 13 55970 0.1055 0.2788 -0.38467 2012 2 14 55971 0.1047 0.2787 -0.38564 2012 2 15 55972 0.1039 0.2785 -0.38641 2012 2 16 55973 0.1031 0.2783 -0.38706 2012 2 17 55974 0.1024 0.2782 -0.38766 2012 2 18 55975 0.1016 0.2781 -0.38830 2012 2 19 55976 0.1009 0.2779 -0.38903 2012 2 20 55977 0.1001 0.2778 -0.38988 2012 2 21 55978 0.0994 0.2777 -0.39087 2012 2 22 55979 0.0986 0.2776 -0.39194 2012 2 23 55980 0.0979 0.2776 -0.39310 2012 2 24 55981 0.0972 0.2775 -0.39435 2012 2 25 55982 0.0965 0.2774 -0.39553 2012 2 26 55983 0.0957 0.2774 -0.39660 2012 2 27 55984 0.0950 0.2774 -0.39762 2012 2 28 55985 0.0943 0.2773 -0.39860 2012 2 29 55986 0.0937 0.2773 -0.39956 2012 3 1 55987 0.0930 0.2773 -0.40050 2012 3 2 55988 0.0923 0.2773 -0.40144 2012 3 3 55989 0.0916 0.2773 -0.40244 2012 3 4 55990 0.0910 0.2773 -0.40352 2012 3 5 55991 0.0903 0.2774 -0.40476 2012 3 6 55992 0.0897 0.2774 -0.40616 2012 3 7 55993 0.0891 0.2775 -0.40784 2012 3 8 55994 0.0884 0.2775 -0.40972 2012 3 9 55995 0.0878 0.2776 -0.41173 2012 3 10 55996 0.0872 0.2777 -0.41379 2012 3 11 55997 0.0866 0.2777 -0.41575 2012 3 12 55998 0.0860 0.2778 -0.41753 2012 3 13 55999 0.0855 0.2779 -0.41911 2012 3 14 56000 0.0849 0.2780 -0.42053 2012 3 15 56001 0.0843 0.2781 -0.42194 2012 3 16 56002 0.0838 0.2783 -0.42346 2012 3 17 56003 0.0832 0.2784 -0.42509 2012 3 18 56004 0.0827 0.2785 -0.42676 2012 3 19 56005 0.0822 0.2787 -0.42850 2012 3 20 56006 0.0816 0.2788 -0.43036 2012 3 21 56007 0.0811 0.2790 -0.43232 2012 3 22 56008 0.0806 0.2791 -0.43431 2012 3 23 56009 0.0801 0.2793 -0.43622 2012 3 24 56010 0.0797 0.2795 -0.43800 2012 3 25 56011 0.0792 0.2797 -0.43965 2012 3 26 56012 0.0787 0.2798 -0.44115 2012 3 27 56013 0.0783 0.2800 -0.44248 2012 3 28 56014 0.0778 0.2802 -0.44372 2012 3 29 56015 0.0774 0.2804 -0.44487 2012 3 30 56016 0.0770 0.2806 -0.44602 2012 3 31 56017 0.0766 0.2808 -0.44728 2012 4 1 56018 0.0762 0.2811 -0.44868 2012 4 2 56019 0.0758 0.2813 -0.45024 2012 4 3 56020 0.0754 0.2815 -0.45195 2012 4 4 56021 0.0750 0.2817 -0.45374 2012 4 5 56022 0.0746 0.2820 -0.45556 2012 4 6 56023 0.0743 0.2822 -0.45732 2012 4 7 56024 0.0739 0.2824 -0.45895 2012 4 8 56025 0.0736 0.2827 -0.46043 2012 4 9 56026 0.0733 0.2829 -0.46174 2012 4 10 56027 0.0729 0.2832 -0.46292 2012 4 11 56028 0.0726 0.2834 -0.46408 2012 4 12 56029 0.0723 0.2837 -0.46528 2012 4 13 56030 0.0720 0.2840 -0.46660 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) 55646 -66.28 0.30 -10.61 0.34 55647 -66.36 0.30 -10.67 0.34 55648 -66.72 0.30 -10.55 0.34 55649 -67.01 0.74 -10.42 0.34 55650 -66.94 0.74 -10.35 0.34 55651 -66.55 0.74 -10.27 0.34 55652 -66.16 0.74 -10.10 0.34 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 55646 -0.105 0.119 -0.380 0.340 55647 -0.098 0.119 -0.357 0.340 55648 -0.101 0.119 -0.310 0.340 55649 -0.113 0.294 -0.271 0.340 55650 -0.132 0.294 -0.240 0.340 55651 -0.144 0.294 -0.213 0.340 55652 -0.160 0.294 -0.168 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.