********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 21 April 2011 Vol. XXIV No. 016 ______________________________________________________________________ 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 = -0.3 seconds beginning 12 May 2011 at 0000 UTC Beginning 1 January 2009: TAI-UTC(BIPM) = 34.000 000 seconds ********************************************************************** * Starting with the 21 April 2011 issue of IERS Bulletin A -- * * Vol. XXIV, No. 016 -- the IGS Ultra LOD solution has replaced * * the IGS Rapid LOD solution usage in the UT1-UTC combination * * solution. Note, only those Ultra epochs beyond the most recent * * GSI, GSFC, and USNO VLBI intensive epoch are used. * ********************************************************************** ________________________________________________________________________ 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 15 55666 -.04401 .00010 0.30672 .00010 -0.227302 0.000010 11 4 16 55667 -.04386 .00010 0.30935 .00010 -0.228927 0.000009 11 4 17 55668 -.04400 .00010 0.31196 .00009 -0.230579 0.000007 11 4 18 55669 -.04423 .00010 0.31433 .00010 -0.232115 0.000006 11 4 19 55670 -.04445 .00011 0.31638 .00010 -0.233453 0.000005 11 4 20 55671 -.04463 .00010 0.31842 .00010 -0.234552 0.000005 11 4 21 55672 -.04494 .00010 0.32047 .00009 -0.235440 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 = 0.0908 - 0.1071 cos A + 0.0323 sin A - 0.0281 cos C - 0.0385 sin C y = 0.3282 + 0.0311 cos A + 0.0977 sin A - 0.0385 cos C + 0.0281 sin C UT1-UTC = -0.2055 - 0.00064 (MJD - 55680) - (UT2-UT1) where A = 2*pi*(MJD-55672)/365.25 and C = 2*pi*(MJD-55672)/435. TAI-UTC(MJD 55673) = 34.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-55672)**0.80 S t = 0.00025 (MJD-55672)**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 22 55673 -0.0450 0.3224 -0.23621 2011 4 23 55674 -0.0451 0.3243 -0.23695 2011 4 24 55675 -0.0450 0.3263 -0.23776 2011 4 25 55676 -0.0449 0.3282 -0.23868 2011 4 26 55677 -0.0448 0.3301 -0.23970 2011 4 27 55678 -0.0445 0.3321 -0.24080 2011 4 28 55679 -0.0443 0.3340 -0.24196 2011 4 29 55680 -0.0439 0.3359 -0.24313 2011 4 30 55681 -0.0436 0.3377 -0.24427 2011 5 1 55682 -0.0432 0.3396 -0.24532 2011 5 2 55683 -0.0428 0.3415 -0.24624 2011 5 3 55684 -0.0423 0.3433 -0.24702 2011 5 4 55685 -0.0418 0.3451 -0.24767 2011 5 5 55686 -0.0413 0.3470 -0.24821 2011 5 6 55687 -0.0407 0.3488 -0.24865 2011 5 7 55688 -0.0401 0.3506 -0.24905 2011 5 8 55689 -0.0395 0.3524 -0.24950 2011 5 9 55690 -0.0388 0.3542 -0.25009 2011 5 10 55691 -0.0381 0.3559 -0.25086 2011 5 11 55692 -0.0374 0.3577 -0.25185 2011 5 12 55693 -0.0367 0.3594 -0.25303 2011 5 13 55694 -0.0359 0.3612 -0.25437 2011 5 14 55695 -0.0351 0.3629 -0.25572 2011 5 15 55696 -0.0343 0.3646 -0.25699 2011 5 16 55697 -0.0334 0.3663 -0.25806 2011 5 17 55698 -0.0325 0.3680 -0.25887 2011 5 18 55699 -0.0316 0.3697 -0.25945 2011 5 19 55700 -0.0307 0.3713 -0.25986 2011 5 20 55701 -0.0297 0.3730 -0.26018 2011 5 21 55702 -0.0287 0.3746 -0.26052 2011 5 22 55703 -0.0277 0.3762 -0.26092 2011 5 23 55704 -0.0267 0.3778 -0.26140 2011 5 24 55705 -0.0256 0.3794 -0.26195 2011 5 25 55706 -0.0245 0.3809 -0.26255 2011 5 26 55707 -0.0234 0.3825 -0.26315 2011 5 27 55708 -0.0223 0.3840 -0.26373 2011 5 28 55709 -0.0212 0.3855 -0.26423 2011 5 29 55710 -0.0200 0.3870 -0.26462 2011 5 30 55711 -0.0188 0.3885 -0.26487 2011 5 31 55712 -0.0176 0.3900 -0.26498 2011 6 1 55713 -0.0163 0.3914 -0.26497 2011 6 2 55714 -0.0151 0.3928 -0.26489 2011 6 3 55715 -0.0138 0.3942 -0.26479 2011 6 4 55716 -0.0125 0.3956 -0.26473 2011 6 5 55717 -0.0112 0.3970 -0.26479 2011 6 6 55718 -0.0099 0.3983 -0.26500 2011 6 7 55719 -0.0085 0.3996 -0.26539 2011 6 8 55720 -0.0072 0.4009 -0.26594 2011 6 9 55721 -0.0058 0.4022 -0.26659 2011 6 10 55722 -0.0044 0.4035 -0.26726 2011 6 11 55723 -0.0030 0.4047 -0.26785 2011 6 12 55724 -0.0015 0.4059 -0.26826 2011 6 13 55725 -0.0001 0.4071 -0.26847 2011 6 14 55726 0.0014 0.4083 -0.26846 2011 6 15 55727 0.0029 0.4094 -0.26828 2011 6 16 55728 0.0044 0.4106 -0.26803 2011 6 17 55729 0.0059 0.4117 -0.26779 2011 6 18 55730 0.0074 0.4128 -0.26760 2011 6 19 55731 0.0089 0.4138 -0.26752 2011 6 20 55732 0.0105 0.4148 -0.26753 2011 6 21 55733 0.0120 0.4159 -0.26761 2011 6 22 55734 0.0136 0.4169 -0.26770 2011 6 23 55735 0.0152 0.4178 -0.26778 2011 6 24 55736 0.0168 0.4188 -0.26778 2011 6 25 55737 0.0184 0.4197 -0.26769 2011 6 26 55738 0.0200 0.4206 -0.26747 2011 6 27 55739 0.0216 0.4214 -0.26713 2011 6 28 55740 0.0232 0.4223 -0.26666 2011 6 29 55741 0.0249 0.4231 -0.26611 2011 6 30 55742 0.0265 0.4239 -0.26553 2011 7 1 55743 0.0282 0.4247 -0.26498 2011 7 2 55744 0.0298 0.4254 -0.26454 2011 7 3 55745 0.0315 0.4262 -0.26426 2011 7 4 55746 0.0332 0.4269 -0.26418 2011 7 5 55747 0.0349 0.4275 -0.26429 2011 7 6 55748 0.0365 0.4282 -0.26452 2011 7 7 55749 0.0382 0.4288 -0.26478 2011 7 8 55750 0.0399 0.4294 -0.26497 2011 7 9 55751 0.0416 0.4300 -0.26500 2011 7 10 55752 0.0433 0.4305 -0.26484 2011 7 11 55753 0.0450 0.4310 -0.26448 2011 7 12 55754 0.0467 0.4315 -0.26396 2011 7 13 55755 0.0485 0.4320 -0.26336 2011 7 14 55756 0.0502 0.4325 -0.26276 2011 7 15 55757 0.0519 0.4329 -0.26223 2011 7 16 55758 0.0536 0.4333 -0.26181 2011 7 17 55759 0.0553 0.4336 -0.26151 2011 7 18 55760 0.0570 0.4340 -0.26131 2011 7 19 55761 0.0587 0.4343 -0.26117 2011 7 20 55762 0.0604 0.4346 -0.26104 2011 7 21 55763 0.0622 0.4349 -0.26088 2011 7 22 55764 0.0639 0.4351 -0.26065 2011 7 23 55765 0.0656 0.4353 -0.26031 2011 7 24 55766 0.0673 0.4355 -0.25986 2011 7 25 55767 0.0690 0.4357 -0.25931 2011 7 26 55768 0.0707 0.4359 -0.25869 2011 7 27 55769 0.0724 0.4360 -0.25803 2011 7 28 55770 0.0741 0.4361 -0.25740 2011 7 29 55771 0.0757 0.4361 -0.25687 2011 7 30 55772 0.0774 0.4362 -0.25652 2011 7 31 55773 0.0791 0.4362 -0.25640 2011 8 1 55774 0.0808 0.4362 -0.25651 2011 8 2 55775 0.0824 0.4362 -0.25681 2011 8 3 55776 0.0841 0.4361 -0.25719 2011 8 4 55777 0.0857 0.4361 -0.25755 2011 8 5 55778 0.0874 0.4360 -0.25776 2011 8 6 55779 0.0890 0.4358 -0.25778 2011 8 7 55780 0.0906 0.4357 -0.25760 2011 8 8 55781 0.0922 0.4355 -0.25725 2011 8 9 55782 0.0938 0.4353 -0.25680 2011 8 10 55783 0.0954 0.4351 -0.25635 2011 8 11 55784 0.0970 0.4349 -0.25596 2011 8 12 55785 0.0986 0.4346 -0.25568 2011 8 13 55786 0.1001 0.4343 -0.25554 2011 8 14 55787 0.1017 0.4340 -0.25552 2011 8 15 55788 0.1032 0.4337 -0.25559 2011 8 16 55789 0.1048 0.4333 -0.25570 2011 8 17 55790 0.1063 0.4330 -0.25581 2011 8 18 55791 0.1078 0.4326 -0.25587 2011 8 19 55792 0.1093 0.4321 -0.25584 2011 8 20 55793 0.1108 0.4317 -0.25571 2011 8 21 55794 0.1122 0.4312 -0.25549 2011 8 22 55795 0.1137 0.4308 -0.25519 2011 8 23 55796 0.1151 0.4303 -0.25484 2011 8 24 55797 0.1165 0.4297 -0.25451 2011 8 25 55798 0.1179 0.4292 -0.25426 2011 8 26 55799 0.1193 0.4286 -0.25417 2011 8 27 55800 0.1207 0.4281 -0.25431 2011 8 28 55801 0.1221 0.4275 -0.25470 2011 8 29 55802 0.1234 0.4268 -0.25534 2011 8 30 55803 0.1248 0.4262 -0.25613 2011 8 31 55804 0.1261 0.4255 -0.25696 2011 9 1 55805 0.1274 0.4249 -0.25770 2011 9 2 55806 0.1286 0.4242 -0.25824 2011 9 3 55807 0.1299 0.4235 -0.25856 2011 9 4 55808 0.1312 0.4227 -0.25868 2011 9 5 55809 0.1324 0.4220 -0.25869 2011 9 6 55810 0.1336 0.4212 -0.25866 2011 9 7 55811 0.1348 0.4204 -0.25868 2011 9 8 55812 0.1360 0.4196 -0.25880 2011 9 9 55813 0.1371 0.4188 -0.25904 2011 9 10 55814 0.1383 0.4180 -0.25942 2011 9 11 55815 0.1394 0.4171 -0.25989 2011 9 12 55816 0.1405 0.4163 -0.26043 2011 9 13 55817 0.1416 0.4154 -0.26099 2011 9 14 55818 0.1426 0.4145 -0.26151 2011 9 15 55819 0.1437 0.4136 -0.26196 2011 9 16 55820 0.1447 0.4127 -0.26233 2011 9 17 55821 0.1457 0.4118 -0.26260 2011 9 18 55822 0.1467 0.4108 -0.26278 2011 9 19 55823 0.1476 0.4099 -0.26292 2011 9 20 55824 0.1486 0.4089 -0.26305 2011 9 21 55825 0.1495 0.4079 -0.26324 2011 9 22 55826 0.1504 0.4069 -0.26355 2011 9 23 55827 0.1513 0.4059 -0.26406 2011 9 24 55828 0.1521 0.4049 -0.26481 2011 9 25 55829 0.1530 0.4038 -0.26582 2011 9 26 55830 0.1538 0.4028 -0.26704 2011 9 27 55831 0.1546 0.4017 -0.26838 2011 9 28 55832 0.1554 0.4007 -0.26971 2011 9 29 55833 0.1561 0.3996 -0.27089 2011 9 30 55834 0.1568 0.3985 -0.27185 2011 10 1 55835 0.1576 0.3974 -0.27259 2011 10 2 55836 0.1582 0.3963 -0.27316 2011 10 3 55837 0.1589 0.3952 -0.27366 2011 10 4 55838 0.1596 0.3941 -0.27418 2011 10 5 55839 0.1602 0.3930 -0.27477 2011 10 6 55840 0.1608 0.3918 -0.27548 2011 10 7 55841 0.1614 0.3907 -0.27629 2011 10 8 55842 0.1619 0.3895 -0.27720 2011 10 9 55843 0.1625 0.3884 -0.27817 2011 10 10 55844 0.1630 0.3872 -0.27916 2011 10 11 55845 0.1635 0.3861 -0.28012 2011 10 12 55846 0.1640 0.3849 -0.28102 2011 10 13 55847 0.1644 0.3837 -0.28181 2011 10 14 55848 0.1648 0.3825 -0.28250 2011 10 15 55849 0.1652 0.3813 -0.28309 2011 10 16 55850 0.1656 0.3801 -0.28361 2011 10 17 55851 0.1660 0.3789 -0.28409 2011 10 18 55852 0.1663 0.3777 -0.28459 2011 10 19 55853 0.1667 0.3765 -0.28516 2011 10 20 55854 0.1670 0.3753 -0.28587 2011 10 21 55855 0.1672 0.3741 -0.28678 2011 10 22 55856 0.1675 0.3729 -0.28791 2011 10 23 55857 0.1677 0.3717 -0.28924 2011 10 24 55858 0.1679 0.3705 -0.29073 2011 10 25 55859 0.1681 0.3693 -0.29227 2011 10 26 55860 0.1683 0.3680 -0.29373 2011 10 27 55861 0.1685 0.3668 -0.29503 2011 10 28 55862 0.1686 0.3656 -0.29611 2011 10 29 55863 0.1687 0.3644 -0.29702 2011 10 30 55864 0.1688 0.3632 -0.29782 2011 10 31 55865 0.1689 0.3619 -0.29863 2011 11 1 55866 0.1689 0.3607 -0.29952 2011 11 2 55867 0.1689 0.3595 -0.30052 2011 11 3 55868 0.1689 0.3583 -0.30163 2011 11 4 55869 0.1689 0.3571 -0.30283 2011 11 5 55870 0.1689 0.3558 -0.30407 2011 11 6 55871 0.1688 0.3546 -0.30532 2011 11 7 55872 0.1688 0.3534 -0.30653 2011 11 8 55873 0.1687 0.3522 -0.30767 2011 11 9 55874 0.1686 0.3510 -0.30871 2011 11 10 55875 0.1684 0.3498 -0.30964 2011 11 11 55876 0.1683 0.3486 -0.31047 2011 11 12 55877 0.1681 0.3474 -0.31124 2011 11 13 55878 0.1679 0.3462 -0.31197 2011 11 14 55879 0.1677 0.3450 -0.31274 2011 11 15 55880 0.1675 0.3439 -0.31357 2011 11 16 55881 0.1673 0.3427 -0.31453 2011 11 17 55882 0.1670 0.3415 -0.31565 2011 11 18 55883 0.1667 0.3403 -0.31695 2011 11 19 55884 0.1664 0.3392 -0.31842 2011 11 20 55885 0.1661 0.3380 -0.32000 2011 11 21 55886 0.1658 0.3369 -0.32162 2011 11 22 55887 0.1655 0.3357 -0.32315 2011 11 23 55888 0.1651 0.3346 -0.32448 2011 11 24 55889 0.1647 0.3335 -0.32554 2011 11 25 55890 0.1643 0.3324 -0.32633 2011 11 26 55891 0.1639 0.3312 -0.32694 2011 11 27 55892 0.1635 0.3301 -0.32745 2011 11 28 55893 0.1631 0.3290 -0.32797 2011 11 29 55894 0.1626 0.3280 -0.32858 2011 11 30 55895 0.1622 0.3269 -0.32930 2011 12 1 55896 0.1617 0.3258 -0.33009 2011 12 2 55897 0.1612 0.3247 -0.33086 2011 12 3 55898 0.1607 0.3237 -0.33164 2011 12 4 55899 0.1601 0.3226 -0.33232 2011 12 5 55900 0.1596 0.3216 -0.33291 2011 12 6 55901 0.1590 0.3206 -0.33345 2011 12 7 55902 0.1585 0.3196 -0.33390 2011 12 8 55903 0.1579 0.3185 -0.33423 2011 12 9 55904 0.1573 0.3175 -0.33445 2011 12 10 55905 0.1567 0.3166 -0.33463 2011 12 11 55906 0.1561 0.3156 -0.33482 2011 12 12 55907 0.1555 0.3146 -0.33505 2011 12 13 55908 0.1548 0.3137 -0.33542 2011 12 14 55909 0.1542 0.3127 -0.33597 2011 12 15 55910 0.1535 0.3118 -0.33670 2011 12 16 55911 0.1528 0.3109 -0.33760 2011 12 17 55912 0.1522 0.3099 -0.33871 2011 12 18 55913 0.1515 0.3090 -0.33987 2011 12 19 55914 0.1508 0.3082 -0.34102 2011 12 20 55915 0.1501 0.3073 -0.34206 2011 12 21 55916 0.1493 0.3064 -0.34293 2011 12 22 55917 0.1486 0.3056 -0.34364 2011 12 23 55918 0.1479 0.3047 -0.34425 2011 12 24 55919 0.1471 0.3039 -0.34483 2011 12 25 55920 0.1464 0.3031 -0.34541 2011 12 26 55921 0.1456 0.3023 -0.34609 2011 12 27 55922 0.1448 0.3015 -0.34690 2011 12 28 55923 0.1441 0.3007 -0.34779 2011 12 29 55924 0.1433 0.2999 -0.34873 2011 12 30 55925 0.1425 0.2992 -0.34970 2011 12 31 55926 0.1417 0.2984 -0.35070 2012 1 1 55927 0.1409 0.2977 -0.35160 2012 1 2 55928 0.1401 0.2970 -0.35236 2012 1 3 55929 0.1393 0.2963 -0.35304 2012 1 4 55930 0.1385 0.2956 -0.35359 2012 1 5 55931 0.1376 0.2949 -0.35398 2012 1 6 55932 0.1368 0.2942 -0.35431 2012 1 7 55933 0.1360 0.2936 -0.35464 2012 1 8 55934 0.1351 0.2929 -0.35500 2012 1 9 55935 0.1343 0.2923 -0.35548 2012 1 10 55936 0.1335 0.2917 -0.35618 2012 1 11 55937 0.1326 0.2911 -0.35706 2012 1 12 55938 0.1318 0.2905 -0.35811 2012 1 13 55939 0.1309 0.2899 -0.35930 2012 1 14 55940 0.1301 0.2894 -0.36056 2012 1 15 55941 0.1292 0.2888 -0.36184 2012 1 16 55942 0.1283 0.2883 -0.36305 2012 1 17 55943 0.1275 0.2878 -0.36408 2012 1 18 55944 0.1266 0.2872 -0.36494 2012 1 19 55945 0.1258 0.2868 -0.36564 2012 1 20 55946 0.1249 0.2863 -0.36622 2012 1 21 55947 0.1240 0.2858 -0.36679 2012 1 22 55948 0.1232 0.2853 -0.36738 2012 1 23 55949 0.1223 0.2849 -0.36803 2012 1 24 55950 0.1214 0.2845 -0.36875 2012 1 25 55951 0.1206 0.2841 -0.36955 2012 1 26 55952 0.1197 0.2837 -0.37044 2012 1 27 55953 0.1189 0.2833 -0.37137 2012 1 28 55954 0.1180 0.2829 -0.37226 2012 1 29 55955 0.1171 0.2825 -0.37310 2012 1 30 55956 0.1163 0.2822 -0.37383 2012 1 31 55957 0.1154 0.2818 -0.37440 2012 2 1 55958 0.1146 0.2815 -0.37482 2012 2 2 55959 0.1137 0.2812 -0.37515 2012 2 3 55960 0.1129 0.2809 -0.37549 2012 2 4 55961 0.1121 0.2806 -0.37583 2012 2 5 55962 0.1112 0.2803 -0.37634 2012 2 6 55963 0.1104 0.2801 -0.37707 2012 2 7 55964 0.1095 0.2798 -0.37800 2012 2 8 55965 0.1087 0.2796 -0.37917 2012 2 9 55966 0.1079 0.2794 -0.38043 2012 2 10 55967 0.1071 0.2792 -0.38176 2012 2 11 55968 0.1063 0.2790 -0.38304 2012 2 12 55969 0.1055 0.2788 -0.38425 2012 2 13 55970 0.1046 0.2786 -0.38533 2012 2 14 55971 0.1038 0.2784 -0.38623 2012 2 15 55972 0.1031 0.2783 -0.38701 2012 2 16 55973 0.1023 0.2781 -0.38770 2012 2 17 55974 0.1015 0.2780 -0.38833 2012 2 18 55975 0.1007 0.2779 -0.38898 2012 2 19 55976 0.0999 0.2778 -0.38972 2012 2 20 55977 0.0992 0.2777 -0.39061 2012 2 21 55978 0.0984 0.2776 -0.39167 2012 2 22 55979 0.0977 0.2775 -0.39284 2012 2 23 55980 0.0969 0.2775 -0.39408 2012 2 24 55981 0.0962 0.2774 -0.39529 2012 2 25 55982 0.0954 0.2774 -0.39642 2012 2 26 55983 0.0947 0.2773 -0.39748 2012 2 27 55984 0.0940 0.2773 -0.39842 2012 2 28 55985 0.0933 0.2773 -0.39920 2012 2 29 55986 0.0926 0.2773 -0.39987 2012 3 1 55987 0.0919 0.2773 -0.40048 2012 3 2 55988 0.0912 0.2773 -0.40106 2012 3 3 55989 0.0905 0.2773 -0.40170 2012 3 4 55990 0.0899 0.2774 -0.40244 2012 3 5 55991 0.0892 0.2774 -0.40334 2012 3 6 55992 0.0885 0.2775 -0.40448 2012 3 7 55993 0.0879 0.2775 -0.40582 2012 3 8 55994 0.0873 0.2776 -0.40740 2012 3 9 55995 0.0866 0.2777 -0.40916 2012 3 10 55996 0.0860 0.2778 -0.41091 2012 3 11 55997 0.0854 0.2779 -0.41253 2012 3 12 55998 0.0848 0.2780 -0.41401 2012 3 13 55999 0.0842 0.2781 -0.41536 2012 3 14 56000 0.0836 0.2782 -0.41663 2012 3 15 56001 0.0831 0.2783 -0.41786 2012 3 16 56002 0.0825 0.2785 -0.41911 2012 3 17 56003 0.0819 0.2786 -0.42044 2012 3 18 56004 0.0814 0.2788 -0.42184 2012 3 19 56005 0.0809 0.2789 -0.42332 2012 3 20 56006 0.0803 0.2791 -0.42486 2012 3 21 56007 0.0798 0.2792 -0.42649 2012 3 22 56008 0.0793 0.2794 -0.42815 2012 3 23 56009 0.0788 0.2796 -0.42980 2012 3 24 56010 0.0783 0.2798 -0.43142 2012 3 25 56011 0.0778 0.2800 -0.43295 2012 3 26 56012 0.0774 0.2802 -0.43437 2012 3 27 56013 0.0769 0.2804 -0.43569 2012 3 28 56014 0.0765 0.2806 -0.43692 2012 3 29 56015 0.0760 0.2808 -0.43819 2012 3 30 56016 0.0756 0.2810 -0.43958 2012 3 31 56017 0.0752 0.2813 -0.44108 2012 4 1 56018 0.0748 0.2815 -0.44264 2012 4 2 56019 0.0744 0.2817 -0.44434 2012 4 3 56020 0.0740 0.2820 -0.44628 2012 4 4 56021 0.0736 0.2822 -0.44847 2012 4 5 56022 0.0732 0.2825 -0.45084 2012 4 6 56023 0.0729 0.2827 -0.45322 2012 4 7 56024 0.0725 0.2830 -0.45548 2012 4 8 56025 0.0722 0.2833 -0.45757 2012 4 9 56026 0.0718 0.2835 -0.45941 2012 4 10 56027 0.0715 0.2838 -0.46099 2012 4 11 56028 0.0712 0.2841 -0.46243 2012 4 12 56029 0.0709 0.2843 -0.46380 2012 4 13 56030 0.0706 0.2846 -0.46517 2012 4 14 56031 0.0703 0.2849 -0.46667 2012 4 15 56032 0.0700 0.2852 -0.46826 2012 4 16 56033 0.0697 0.2855 -0.46990 2012 4 17 56034 0.0695 0.2857 -0.47151 2012 4 18 56035 0.0692 0.2860 -0.47300 2012 4 19 56036 0.0690 0.2863 -0.47432 2012 4 20 56037 0.0688 0.2866 -0.47544 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) 55653 -65.77 0.17 -10.03 0.34 55654 -65.76 0.17 -10.10 0.34 55655 -65.81 0.17 -10.40 0.34 55656 -65.78 0.74 -10.74 0.34 55657 -65.60 0.22 -10.96 0.15 55658 -65.33 0.22 -11.07 0.15 55659 -65.19 0.22 -11.18 0.15 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 55653 -0.102 0.068 -0.202 0.340 55654 -0.120 0.068 -0.197 0.340 55655 -0.131 0.068 -0.219 0.340 55656 -0.131 0.294 -0.235 0.340 55657 -0.115 0.088 -0.245 0.150 55658 -0.082 0.088 -0.262 0.150 55659 -0.054 0.088 -0.290 0.150 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.