********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 10 March 2011 Vol. XXIV No. 010 ______________________________________________________________________ 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 3 4 55624 -.00256 .00010 0.23193 .00009 -0.181149 0.000015 11 3 5 55625 -.00298 .00010 0.23357 .00009 -0.182318 0.000015 11 3 6 55626 -.00342 .00010 0.23551 .00009 -0.183529 0.000016 11 3 7 55627 -.00442 .00009 0.23744 .00009 -0.184696 0.000015 11 3 8 55628 -.00574 .00009 0.23899 .00009 -0.185762 0.000014 11 3 9 55629 -.00687 .00009 0.24054 .00009 -0.186744 0.000012 11 3 10 55630 -.00780 .00010 0.24234 .00010 -0.187629 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 = 0.0958 - 0.0979 cos A - 0.0578 sin A - 0.0110 cos C - 0.0409 sin C y = 0.3366 - 0.0498 cos A + 0.0885 sin A - 0.0409 cos C + 0.0110 sin C UT1-UTC = -0.1772 - 0.00065 (MJD - 55638) - (UT2-UT1) where A = 2*pi*(MJD-55630)/365.25 and C = 2*pi*(MJD-55630)/435. TAI-UTC(MJD 55631) = 34.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-55630)**0.80 S t = 0.00025 (MJD-55630)**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 3 11 55631 -0.0089 0.2440 -0.18839 2011 3 12 55632 -0.0098 0.2458 -0.18904 2011 3 13 55633 -0.0107 0.2476 -0.18961 2011 3 14 55634 -0.0117 0.2494 -0.19019 2011 3 15 55635 -0.0126 0.2511 -0.19090 2011 3 16 55636 -0.0136 0.2527 -0.19183 2011 3 17 55637 -0.0145 0.2543 -0.19304 2011 3 18 55638 -0.0154 0.2560 -0.19450 2011 3 19 55639 -0.0163 0.2576 -0.19614 2011 3 20 55640 -0.0171 0.2592 -0.19782 2011 3 21 55641 -0.0179 0.2609 -0.19939 2011 3 22 55642 -0.0187 0.2626 -0.20080 2011 3 23 55643 -0.0195 0.2642 -0.20199 2011 3 24 55644 -0.0202 0.2659 -0.20297 2011 3 25 55645 -0.0210 0.2675 -0.20382 2011 3 26 55646 -0.0216 0.2692 -0.20461 2011 3 27 55647 -0.0223 0.2709 -0.20541 2011 3 28 55648 -0.0229 0.2726 -0.20626 2011 3 29 55649 -0.0235 0.2743 -0.20721 2011 3 30 55650 -0.0241 0.2759 -0.20827 2011 3 31 55651 -0.0246 0.2776 -0.20944 2011 4 1 55652 -0.0251 0.2793 -0.21068 2011 4 2 55653 -0.0256 0.2811 -0.21193 2011 4 3 55654 -0.0260 0.2828 -0.21316 2011 4 4 55655 -0.0264 0.2845 -0.21431 2011 4 5 55656 -0.0268 0.2862 -0.21535 2011 4 6 55657 -0.0272 0.2879 -0.21626 2011 4 7 55658 -0.0275 0.2897 -0.21706 2011 4 8 55659 -0.0278 0.2914 -0.21776 2011 4 9 55660 -0.0280 0.2932 -0.21843 2011 4 10 55661 -0.0283 0.2949 -0.21912 2011 4 11 55662 -0.0285 0.2967 -0.21991 2011 4 12 55663 -0.0287 0.2984 -0.22087 2011 4 13 55664 -0.0288 0.3001 -0.22206 2011 4 14 55665 -0.0289 0.3019 -0.22349 2011 4 15 55666 -0.0290 0.3037 -0.22512 2011 4 16 55667 -0.0290 0.3054 -0.22683 2011 4 17 55668 -0.0291 0.3072 -0.22851 2011 4 18 55669 -0.0290 0.3089 -0.23002 2011 4 19 55670 -0.0290 0.3107 -0.23129 2011 4 20 55671 -0.0289 0.3124 -0.23230 2011 4 21 55672 -0.0288 0.3142 -0.23311 2011 4 22 55673 -0.0287 0.3159 -0.23380 2011 4 23 55674 -0.0286 0.3177 -0.23448 2011 4 24 55675 -0.0284 0.3194 -0.23520 2011 4 25 55676 -0.0282 0.3211 -0.23601 2011 4 26 55677 -0.0279 0.3229 -0.23690 2011 4 27 55678 -0.0276 0.3246 -0.23787 2011 4 28 55679 -0.0273 0.3263 -0.23889 2011 4 29 55680 -0.0270 0.3281 -0.23991 2011 4 30 55681 -0.0267 0.3298 -0.24089 2011 5 1 55682 -0.0263 0.3315 -0.24179 2011 5 2 55683 -0.0259 0.3332 -0.24258 2011 5 3 55684 -0.0254 0.3349 -0.24324 2011 5 4 55685 -0.0250 0.3366 -0.24377 2011 5 5 55686 -0.0245 0.3383 -0.24419 2011 5 6 55687 -0.0240 0.3399 -0.24454 2011 5 7 55688 -0.0234 0.3416 -0.24490 2011 5 8 55689 -0.0228 0.3432 -0.24531 2011 5 9 55690 -0.0222 0.3449 -0.24586 2011 5 10 55691 -0.0216 0.3465 -0.24658 2011 5 11 55692 -0.0210 0.3482 -0.24751 2011 5 12 55693 -0.0203 0.3498 -0.24863 2011 5 13 55694 -0.0196 0.3514 -0.24986 2011 5 14 55695 -0.0189 0.3530 -0.25110 2011 5 15 55696 -0.0181 0.3546 -0.25223 2011 5 16 55697 -0.0173 0.3561 -0.25316 2011 5 17 55698 -0.0165 0.3577 -0.25384 2011 5 18 55699 -0.0157 0.3592 -0.25431 2011 5 19 55700 -0.0149 0.3608 -0.25464 2011 5 20 55701 -0.0140 0.3623 -0.25491 2011 5 21 55702 -0.0131 0.3638 -0.25521 2011 5 22 55703 -0.0122 0.3653 -0.25559 2011 5 23 55704 -0.0113 0.3668 -0.25606 2011 5 24 55705 -0.0103 0.3682 -0.25661 2011 5 25 55706 -0.0093 0.3697 -0.25721 2011 5 26 55707 -0.0084 0.3711 -0.25782 2011 5 27 55708 -0.0073 0.3725 -0.25840 2011 5 28 55709 -0.0063 0.3739 -0.25890 2011 5 29 55710 -0.0052 0.3753 -0.25929 2011 5 30 55711 -0.0042 0.3767 -0.25955 2011 5 31 55712 -0.0031 0.3780 -0.25968 2011 6 1 55713 -0.0019 0.3794 -0.25970 2011 6 2 55714 -0.0008 0.3807 -0.25964 2011 6 3 55715 0.0003 0.3820 -0.25956 2011 6 4 55716 0.0015 0.3833 -0.25954 2011 6 5 55717 0.0027 0.3845 -0.25963 2011 6 6 55718 0.0039 0.3858 -0.25989 2011 6 7 55719 0.0051 0.3870 -0.26033 2011 6 8 55720 0.0064 0.3882 -0.26095 2011 6 9 55721 0.0076 0.3894 -0.26168 2011 6 10 55722 0.0089 0.3905 -0.26241 2011 6 11 55723 0.0102 0.3917 -0.26307 2011 6 12 55724 0.0115 0.3928 -0.26354 2011 6 13 55725 0.0128 0.3939 -0.26380 2011 6 14 55726 0.0141 0.3950 -0.26383 2011 6 15 55727 0.0154 0.3961 -0.26370 2011 6 16 55728 0.0168 0.3971 -0.26349 2011 6 17 55729 0.0182 0.3982 -0.26327 2011 6 18 55730 0.0195 0.3992 -0.26313 2011 6 19 55731 0.0209 0.4001 -0.26308 2011 6 20 55732 0.0223 0.4011 -0.26312 2011 6 21 55733 0.0237 0.4020 -0.26322 2011 6 22 55734 0.0251 0.4030 -0.26334 2011 6 23 55735 0.0266 0.4039 -0.26345 2011 6 24 55736 0.0280 0.4047 -0.26349 2011 6 25 55737 0.0295 0.4056 -0.26343 2011 6 26 55738 0.0309 0.4064 -0.26326 2011 6 27 55739 0.0324 0.4072 -0.26294 2011 6 28 55740 0.0339 0.4080 -0.26251 2011 6 29 55741 0.0353 0.4088 -0.26199 2011 6 30 55742 0.0368 0.4095 -0.26145 2011 7 1 55743 0.0383 0.4102 -0.26094 2011 7 2 55744 0.0398 0.4109 -0.26054 2011 7 3 55745 0.0413 0.4116 -0.26031 2011 7 4 55746 0.0428 0.4122 -0.26028 2011 7 5 55747 0.0443 0.4128 -0.26044 2011 7 6 55748 0.0459 0.4134 -0.26073 2011 7 7 55749 0.0474 0.4140 -0.26105 2011 7 8 55750 0.0489 0.4146 -0.26130 2011 7 9 55751 0.0505 0.4151 -0.26139 2011 7 10 55752 0.0520 0.4156 -0.26128 2011 7 11 55753 0.0535 0.4161 -0.26098 2011 7 12 55754 0.0551 0.4165 -0.26051 2011 7 13 55755 0.0566 0.4170 -0.25997 2011 7 14 55756 0.0581 0.4174 -0.25942 2011 7 15 55757 0.0597 0.4178 -0.25894 2011 7 16 55758 0.0612 0.4181 -0.25857 2011 7 17 55759 0.0628 0.4185 -0.25833 2011 7 18 55760 0.0643 0.4188 -0.25818 2011 7 19 55761 0.0658 0.4191 -0.25809 2011 7 20 55762 0.0674 0.4194 -0.25801 2011 7 21 55763 0.0689 0.4196 -0.25789 2011 7 22 55764 0.0705 0.4198 -0.25770 2011 7 23 55765 0.0720 0.4200 -0.25741 2011 7 24 55766 0.0735 0.4202 -0.25700 2011 7 25 55767 0.0750 0.4204 -0.25649 2011 7 26 55768 0.0766 0.4205 -0.25589 2011 7 27 55769 0.0781 0.4206 -0.25526 2011 7 28 55770 0.0796 0.4207 -0.25465 2011 7 29 55771 0.0811 0.4208 -0.25415 2011 7 30 55772 0.0826 0.4208 -0.25382 2011 7 31 55773 0.0841 0.4208 -0.25372 2011 8 1 55774 0.0856 0.4208 -0.25385 2011 8 2 55775 0.0871 0.4208 -0.25417 2011 8 3 55776 0.0885 0.4208 -0.25457 2011 8 4 55777 0.0900 0.4207 -0.25494 2011 8 5 55778 0.0915 0.4206 -0.25517 2011 8 6 55779 0.0929 0.4205 -0.25520 2011 8 7 55780 0.0944 0.4203 -0.25502 2011 8 8 55781 0.0958 0.4202 -0.25468 2011 8 9 55782 0.0972 0.4200 -0.25425 2011 8 10 55783 0.0987 0.4198 -0.25380 2011 8 11 55784 0.1001 0.4196 -0.25343 2011 8 12 55785 0.1015 0.4193 -0.25316 2011 8 13 55786 0.1029 0.4191 -0.25303 2011 8 14 55787 0.1042 0.4188 -0.25302 2011 8 15 55788 0.1056 0.4185 -0.25310 2011 8 16 55789 0.1070 0.4181 -0.25323 2011 8 17 55790 0.1083 0.4178 -0.25335 2011 8 18 55791 0.1096 0.4174 -0.25342 2011 8 19 55792 0.1110 0.4170 -0.25340 2011 8 20 55793 0.1123 0.4166 -0.25329 2011 8 21 55794 0.1136 0.4162 -0.25308 2011 8 22 55795 0.1148 0.4158 -0.25280 2011 8 23 55796 0.1161 0.4153 -0.25247 2011 8 24 55797 0.1174 0.4148 -0.25216 2011 8 25 55798 0.1186 0.4143 -0.25194 2011 8 26 55799 0.1198 0.4138 -0.25187 2011 8 27 55800 0.1210 0.4133 -0.25203 2011 8 28 55801 0.1222 0.4127 -0.25245 2011 8 29 55802 0.1234 0.4121 -0.25311 2011 8 30 55803 0.1246 0.4116 -0.25393 2011 8 31 55804 0.1257 0.4109 -0.25479 2011 9 1 55805 0.1269 0.4103 -0.25555 2011 9 2 55806 0.1280 0.4097 -0.25613 2011 9 3 55807 0.1291 0.4090 -0.25648 2011 9 4 55808 0.1302 0.4084 -0.25664 2011 9 5 55809 0.1312 0.4077 -0.25668 2011 9 6 55810 0.1323 0.4070 -0.25669 2011 9 7 55811 0.1333 0.4062 -0.25675 2011 9 8 55812 0.1344 0.4055 -0.25692 2011 9 9 55813 0.1354 0.4048 -0.25722 2011 9 10 55814 0.1363 0.4040 -0.25764 2011 9 11 55815 0.1373 0.4032 -0.25817 2011 9 12 55816 0.1383 0.4024 -0.25877 2011 9 13 55817 0.1392 0.4016 -0.25939 2011 9 14 55818 0.1401 0.4008 -0.25997 2011 9 15 55819 0.1410 0.4000 -0.26049 2011 9 16 55820 0.1419 0.3991 -0.26092 2011 9 17 55821 0.1427 0.3983 -0.26125 2011 9 18 55822 0.1436 0.3974 -0.26148 2011 9 19 55823 0.1444 0.3965 -0.26165 2011 9 20 55824 0.1452 0.3956 -0.26178 2011 9 21 55825 0.1460 0.3947 -0.26194 2011 9 22 55826 0.1467 0.3938 -0.26218 2011 9 23 55827 0.1475 0.3929 -0.26259 2011 9 24 55828 0.1482 0.3920 -0.26321 2011 9 25 55829 0.1489 0.3910 -0.26406 2011 9 26 55830 0.1496 0.3901 -0.26512 2011 9 27 55831 0.1503 0.3891 -0.26632 2011 9 28 55832 0.1509 0.3881 -0.26752 2011 9 29 55833 0.1515 0.3871 -0.26861 2011 9 30 55834 0.1521 0.3862 -0.26953 2011 10 1 55835 0.1527 0.3852 -0.27025 2011 10 2 55836 0.1533 0.3842 -0.27085 2011 10 3 55837 0.1538 0.3831 -0.27139 2011 10 4 55838 0.1544 0.3821 -0.27198 2011 10 5 55839 0.1549 0.3811 -0.27267 2011 10 6 55840 0.1554 0.3801 -0.27348 2011 10 7 55841 0.1558 0.3790 -0.27442 2011 10 8 55842 0.1563 0.3780 -0.27546 2011 10 9 55843 0.1567 0.3769 -0.27655 2011 10 10 55844 0.1571 0.3759 -0.27766 2011 10 11 55845 0.1575 0.3748 -0.27873 2011 10 12 55846 0.1579 0.3737 -0.27973 2011 10 13 55847 0.1582 0.3727 -0.28063 2011 10 14 55848 0.1585 0.3716 -0.28141 2011 10 15 55849 0.1589 0.3705 -0.28210 2011 10 16 55850 0.1591 0.3694 -0.28274 2011 10 17 55851 0.1594 0.3683 -0.28338 2011 10 18 55852 0.1597 0.3673 -0.28410 2011 10 19 55853 0.1599 0.3662 -0.28490 2011 10 20 55854 0.1601 0.3651 -0.28585 2011 10 21 55855 0.1603 0.3640 -0.28697 2011 10 22 55856 0.1605 0.3629 -0.28830 2011 10 23 55857 0.1606 0.3618 -0.28988 2011 10 24 55858 0.1607 0.3607 -0.29162 2011 10 25 55859 0.1609 0.3596 -0.29339 2011 10 26 55860 0.1610 0.3585 -0.29508 2011 10 27 55861 0.1610 0.3574 -0.29657 2011 10 28 55862 0.1611 0.3563 -0.29783 2011 10 29 55863 0.1611 0.3552 -0.29889 2011 10 30 55864 0.1611 0.3541 -0.29977 2011 10 31 55865 0.1611 0.3530 -0.30058 2011 11 1 55866 0.1611 0.3519 -0.30136 2011 11 2 55867 0.1611 0.3508 -0.30222 2011 11 3 55868 0.1610 0.3497 -0.30320 2011 11 4 55869 0.1610 0.3486 -0.30428 2011 11 5 55870 0.1609 0.3475 -0.30542 2011 11 6 55871 0.1608 0.3465 -0.30659 2011 11 7 55872 0.1606 0.3454 -0.30772 2011 11 8 55873 0.1605 0.3443 -0.30874 2011 11 9 55874 0.1603 0.3432 -0.30961 2011 11 10 55875 0.1602 0.3421 -0.31036 2011 11 11 55876 0.1600 0.3411 -0.31104 2011 11 12 55877 0.1598 0.3400 -0.31162 2011 11 13 55878 0.1595 0.3390 -0.31223 2011 11 14 55879 0.1593 0.3379 -0.31292 2011 11 15 55880 0.1590 0.3369 -0.31367 2011 11 16 55881 0.1588 0.3358 -0.31455 2011 11 17 55882 0.1585 0.3348 -0.31548 2011 11 18 55883 0.1582 0.3337 -0.31654 2011 11 19 55884 0.1579 0.3327 -0.31771 2011 11 20 55885 0.1575 0.3317 -0.31901 2011 11 21 55886 0.1572 0.3307 -0.32041 2011 11 22 55887 0.1568 0.3297 -0.32179 2011 11 23 55888 0.1564 0.3287 -0.32310 2011 11 24 55889 0.1560 0.3277 -0.32422 2011 11 25 55890 0.1556 0.3267 -0.32513 2011 11 26 55891 0.1552 0.3257 -0.32586 2011 11 27 55892 0.1548 0.3248 -0.32651 2011 11 28 55893 0.1543 0.3238 -0.32721 2011 11 29 55894 0.1539 0.3228 -0.32802 2011 11 30 55895 0.1534 0.3219 -0.32895 2011 12 1 55896 0.1529 0.3210 -0.32999 2011 12 2 55897 0.1524 0.3200 -0.33106 2011 12 3 55898 0.1519 0.3191 -0.33210 2011 12 4 55899 0.1514 0.3182 -0.33314 2011 12 5 55900 0.1509 0.3173 -0.33409 2011 12 6 55901 0.1503 0.3164 -0.33489 2011 12 7 55902 0.1498 0.3155 -0.33555 2011 12 8 55903 0.1492 0.3147 -0.33608 2011 12 9 55904 0.1486 0.3138 -0.33648 2011 12 10 55905 0.1480 0.3129 -0.33682 2011 12 11 55906 0.1474 0.3121 -0.33713 2011 12 12 55907 0.1468 0.3113 -0.33747 2011 12 13 55908 0.1462 0.3104 -0.33792 2011 12 14 55909 0.1456 0.3096 -0.33850 2011 12 15 55910 0.1450 0.3088 -0.33929 2011 12 16 55911 0.1443 0.3080 -0.34036 2011 12 17 55912 0.1437 0.3073 -0.34155 2011 12 18 55913 0.1430 0.3065 -0.34281 2011 12 19 55914 0.1423 0.3057 -0.34411 2011 12 20 55915 0.1417 0.3050 -0.34540 2011 12 21 55916 0.1410 0.3043 -0.34659 2011 12 22 55917 0.1403 0.3036 -0.34763 2011 12 23 55918 0.1396 0.3028 -0.34853 2011 12 24 55919 0.1389 0.3021 -0.34935 2011 12 25 55920 0.1382 0.3015 -0.35014 2011 12 26 55921 0.1375 0.3008 -0.35097 2011 12 27 55922 0.1368 0.3001 -0.35188 2011 12 28 55923 0.1361 0.2995 -0.35293 2011 12 29 55924 0.1353 0.2988 -0.35409 2011 12 30 55925 0.1346 0.2982 -0.35531 2011 12 31 55926 0.1339 0.2976 -0.35655 2012 1 1 55927 0.1331 0.2970 -0.35775 2012 1 2 55928 0.1324 0.2964 -0.35887 2012 1 3 55929 0.1316 0.2958 -0.35987 2012 1 4 55930 0.1309 0.2953 -0.36073 2012 1 5 55931 0.1301 0.2947 -0.36156 2012 1 6 55932 0.1294 0.2942 -0.36242 2012 1 7 55933 0.1286 0.2936 -0.36329 2012 1 8 55934 0.1278 0.2931 -0.36411 2012 1 9 55935 0.1271 0.2926 -0.36500 2012 1 10 55936 0.1263 0.2921 -0.36605 2012 1 11 55937 0.1255 0.2917 -0.36733 2012 1 12 55938 0.1248 0.2912 -0.36884 2012 1 13 55939 0.1240 0.2908 -0.37046 2012 1 14 55940 0.1232 0.2903 -0.37213 2012 1 15 55941 0.1225 0.2899 -0.37377 2012 1 16 55942 0.1217 0.2895 -0.37530 2012 1 17 55943 0.1209 0.2891 -0.37661 2012 1 18 55944 0.1202 0.2887 -0.37774 2012 1 19 55945 0.1194 0.2883 -0.37866 2012 1 20 55946 0.1186 0.2879 -0.37947 2012 1 21 55947 0.1179 0.2876 -0.38031 2012 1 22 55948 0.1171 0.2873 -0.38121 2012 1 23 55949 0.1163 0.2869 -0.38221 2012 1 24 55950 0.1156 0.2866 -0.38327 2012 1 25 55951 0.1148 0.2863 -0.38433 2012 1 26 55952 0.1140 0.2860 -0.38534 2012 1 27 55953 0.1133 0.2857 -0.38624 2012 1 28 55954 0.1125 0.2855 -0.38705 2012 1 29 55955 0.1118 0.2852 -0.38779 2012 1 30 55956 0.1110 0.2850 -0.38846 2012 1 31 55957 0.1103 0.2848 -0.38908 2012 2 1 55958 0.1096 0.2845 -0.38969 2012 2 2 55959 0.1088 0.2843 -0.39029 2012 2 3 55960 0.1081 0.2841 -0.39093 2012 2 4 55961 0.1074 0.2840 -0.39166 2012 2 5 55962 0.1066 0.2838 -0.39251 2012 2 6 55963 0.1059 0.2836 -0.39352 2012 2 7 55964 0.1052 0.2835 -0.39468 2012 2 8 55965 0.1045 0.2833 -0.39597 2012 2 9 55966 0.1038 0.2832 -0.39747 2012 2 10 55967 0.1031 0.2831 -0.39911 2012 2 11 55968 0.1024 0.2830 -0.40082 2012 2 12 55969 0.1017 0.2829 -0.40247 2012 2 13 55970 0.1010 0.2828 -0.40396 2012 2 14 55971 0.1004 0.2828 -0.40528 2012 2 15 55972 0.0997 0.2827 -0.40646 2012 2 16 55973 0.0990 0.2826 -0.40754 2012 2 17 55974 0.0984 0.2826 -0.40857 2012 2 18 55975 0.0977 0.2826 -0.40964 2012 2 19 55976 0.0971 0.2826 -0.41079 2012 2 20 55977 0.0965 0.2825 -0.41203 2012 2 21 55978 0.0958 0.2825 -0.41333 2012 2 22 55979 0.0952 0.2826 -0.41471 2012 2 23 55980 0.0946 0.2826 -0.41609 2012 2 24 55981 0.0940 0.2826 -0.41747 2012 2 25 55982 0.0934 0.2826 -0.41881 2012 2 26 55983 0.0928 0.2827 -0.42003 2012 2 27 55984 0.0923 0.2827 -0.42112 2012 2 28 55985 0.0917 0.2828 -0.42208 2012 2 29 55986 0.0911 0.2829 -0.42290 2012 3 1 55987 0.0906 0.2830 -0.42362 2012 3 2 55988 0.0900 0.2830 -0.42433 2012 3 3 55989 0.0895 0.2831 -0.42512 2012 3 4 55990 0.0890 0.2832 -0.42609 2012 3 5 55991 0.0884 0.2834 -0.42730 2012 3 6 55992 0.0879 0.2835 -0.42870 2012 3 7 55993 0.0874 0.2836 -0.43020 2012 3 8 55994 0.0869 0.2837 -0.43179 2012 3 9 55995 0.0865 0.2839 -0.43345 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) 55611 -66.71 0.19 -7.92 0.17 55612 -66.86 0.12 -7.60 0.10 55613 -67.19 0.12 -7.55 0.10 55614 -67.47 0.74 -7.69 0.34 55615 -67.61 0.74 -7.89 0.34 55616 -67.64 0.74 -8.11 0.34 55617 -67.62 0.74 -8.37 0.34 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 55611 -0.012 0.076 -0.544 0.170 55612 -0.025 0.048 -0.546 0.100 55613 -0.040 0.048 -0.487 0.100 55614 -0.064 0.294 -0.417 0.340 55615 -0.081 0.294 -0.373 0.340 55616 -0.090 0.294 -0.330 0.340 55617 -0.100 0.294 -0.289 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.