********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 18 May 2017 Vol. XXX No. 020 ______________________________________________________________________ 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 = +0.4 seconds beginning 30 Mar 2017 at 0000 UTC Beginning 1 January 2017: TAI-UTC = 37.000 000 seconds *********************************************************************** * * * Please note that daily and Bulletin A EOP data can be obtained from * * the primary Earth Orientation (EO) servers at: * * http://maia.usno.navy.mil ftp://maia.usno.navy.mil * * and from the backup EO server at: * * http://toshi.nofs.navy.mil ftp://toshi.nofs.navy.mil * * * * An additional backup mirror of the daily and Bulletin A EOP data * * is now hosted by NASA's Archive of Space Geodesy Data server at: * * ftp://cddis.gsfc.nasa.gov/pub/products/iers * * Daily EOP data will be uploaded here at 18:00 UTC, and * * Bulletin A EOP data should be available by 20:00 UTC. * * * * We are currently not able to receive email at * * ser7@maia.usno.navy.mil. The issue is being addressed, but we have * * no alternate solution at this time. * * * * Distribution statement A. Approved for public release: * * distribution unlimited. * * * *********************************************************************** ________________________________________________________________________ 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 17 5 12 57885 0.05853 .00009 0.44592 .00009 0.406099 0.000017 17 5 13 57886 0.06074 .00009 0.44728 .00009 0.404979 0.000016 17 5 14 57887 0.06286 .00009 0.44844 .00009 0.403922 0.000017 17 5 15 57888 0.06483 .00009 0.44931 .00009 0.402944 0.000018 17 5 16 57889 0.06675 .00009 0.44985 .00009 0.401964 0.000019 17 5 17 57890 0.06869 .00009 0.45029 .00009 0.400902 0.000018 17 5 18 57891 0.07060 .00009 0.45075 .00009 0.399759 0.000019 _______________________________________________________________________ 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 = 0.1238 - 0.0137 cos A + 0.0985 sin A - 0.0387 cos C - 0.0134 sin C y = 0.3677 + 0.0912 cos A + 0.0180 sin A - 0.0134 cos C + 0.0387 sin C UT1-UTC = 0.4280 - 0.00115 (MJD - 57899) - (UT2-UT1) where A = 2*pi*(MJD-57891)/365.25 and C = 2*pi*(MJD-57891)/435. TAI-UTC(MJD 57892) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-57891)**0.80 S t = 0.00025 (MJD-57891)**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) 2017 5 19 57892 0.0725 0.4513 0.39856 2017 5 20 57893 0.0742 0.4519 0.39726 2017 5 21 57894 0.0759 0.4526 0.39582 2017 5 22 57895 0.0775 0.4532 0.39424 2017 5 23 57896 0.0790 0.4538 0.39259 2017 5 24 57897 0.0806 0.4543 0.39093 2017 5 25 57898 0.0823 0.4547 0.38937 2017 5 26 57899 0.0840 0.4552 0.38797 2017 5 27 57900 0.0857 0.4556 0.38673 2017 5 28 57901 0.0874 0.4559 0.38562 2017 5 29 57902 0.0891 0.4563 0.38459 2017 5 30 57903 0.0908 0.4566 0.38357 2017 5 31 57904 0.0926 0.4570 0.38249 2017 6 1 57905 0.0943 0.4573 0.38136 2017 6 2 57906 0.0960 0.4576 0.38020 2017 6 3 57907 0.0978 0.4578 0.37905 2017 6 4 57908 0.0995 0.4580 0.37797 2017 6 5 57909 0.1012 0.4581 0.37696 2017 6 6 57910 0.1029 0.4582 0.37606 2017 6 7 57911 0.1046 0.4582 0.37529 2017 6 8 57912 0.1063 0.4583 0.37466 2017 6 9 57913 0.1080 0.4583 0.37415 2017 6 10 57914 0.1097 0.4583 0.37373 2017 6 11 57915 0.1114 0.4583 0.37337 2017 6 12 57916 0.1130 0.4582 0.37302 2017 6 13 57917 0.1147 0.4582 0.37264 2017 6 14 57918 0.1164 0.4580 0.37219 2017 6 15 57919 0.1181 0.4579 0.37163 2017 6 16 57920 0.1197 0.4577 0.37095 2017 6 17 57921 0.1214 0.4575 0.37014 2017 6 18 57922 0.1230 0.4573 0.36923 2017 6 19 57923 0.1247 0.4571 0.36826 2017 6 20 57924 0.1264 0.4568 0.36729 2017 6 21 57925 0.1280 0.4565 0.36638 2017 6 22 57926 0.1296 0.4562 0.36561 2017 6 23 57927 0.1313 0.4558 0.36499 2017 6 24 57928 0.1329 0.4554 0.36450 2017 6 25 57929 0.1345 0.4550 0.36410 2017 6 26 57930 0.1361 0.4546 0.36372 2017 6 27 57931 0.1377 0.4541 0.36329 2017 6 28 57932 0.1393 0.4536 0.36281 2017 6 29 57933 0.1408 0.4531 0.36230 2017 6 30 57934 0.1424 0.4526 0.36177 2017 7 1 57935 0.1440 0.4520 0.36129 2017 7 2 57936 0.1455 0.4515 0.36087 2017 7 3 57937 0.1470 0.4508 0.36054 2017 7 4 57938 0.1485 0.4502 0.36033 2017 7 5 57939 0.1500 0.4495 0.36023 2017 7 6 57940 0.1515 0.4489 0.36025 2017 7 7 57941 0.1530 0.4481 0.36037 2017 7 8 57942 0.1545 0.4474 0.36056 2017 7 9 57943 0.1559 0.4467 0.36079 2017 7 10 57944 0.1573 0.4459 0.36100 2017 7 11 57945 0.1587 0.4451 0.36116 2017 7 12 57946 0.1601 0.4442 0.36121 2017 7 13 57947 0.1615 0.4434 0.36113 2017 7 14 57948 0.1629 0.4425 0.36092 2017 7 15 57949 0.1642 0.4416 0.36057 2017 7 16 57950 0.1656 0.4407 0.36012 2017 7 17 57951 0.1669 0.4398 0.35963 2017 7 18 57952 0.1682 0.4388 0.35915 2017 7 19 57953 0.1695 0.4378 0.35873 2017 7 20 57954 0.1707 0.4368 0.35842 2017 7 21 57955 0.1719 0.4358 0.35821 2017 7 22 57956 0.1732 0.4348 0.35807 2017 7 23 57957 0.1744 0.4337 0.35794 2017 7 24 57958 0.1755 0.4326 0.35775 2017 7 25 57959 0.1767 0.4315 0.35747 2017 7 26 57960 0.1778 0.4304 0.35710 2017 7 27 57961 0.1789 0.4293 0.35668 2017 7 28 57962 0.1800 0.4281 0.35624 2017 7 29 57963 0.1811 0.4269 0.35585 2017 7 30 57964 0.1821 0.4257 0.35552 2017 7 31 57965 0.1832 0.4245 0.35529 2017 8 1 57966 0.1842 0.4233 0.35516 2017 8 2 57967 0.1851 0.4221 0.35513 2017 8 3 57968 0.1861 0.4208 0.35518 2017 8 4 57969 0.1870 0.4195 0.35528 2017 8 5 57970 0.1879 0.4182 0.35539 2017 8 6 57971 0.1888 0.4169 0.35548 2017 8 7 57972 0.1896 0.4156 0.35550 2017 8 8 57973 0.1905 0.4143 0.35540 2017 8 9 57974 0.1913 0.4129 0.35515 2017 8 10 57975 0.1920 0.4116 0.35475 2017 8 11 57976 0.1928 0.4102 0.35421 2017 8 12 57977 0.1935 0.4088 0.35357 2017 8 13 57978 0.1942 0.4074 0.35287 2017 8 14 57979 0.1949 0.4060 0.35218 2017 8 15 57980 0.1955 0.4046 0.35155 2017 8 16 57981 0.1961 0.4031 0.35100 2017 8 17 57982 0.1967 0.4017 0.35054 2017 8 18 57983 0.1973 0.4002 0.35014 2017 8 19 57984 0.1978 0.3988 0.34974 2017 8 20 57985 0.1983 0.3973 0.34929 2017 8 21 57986 0.1988 0.3958 0.34873 2017 8 22 57987 0.1993 0.3943 0.34804 2017 8 23 57988 0.1997 0.3928 0.34724 2017 8 24 57989 0.2001 0.3913 0.34639 2017 8 25 57990 0.2004 0.3898 0.34553 2017 8 26 57991 0.2008 0.3883 0.34472 2017 8 27 57992 0.2011 0.3867 0.34400 2017 8 28 57993 0.2014 0.3852 0.34337 2017 8 29 57994 0.2016 0.3837 0.34285 2017 8 30 57995 0.2018 0.3821 0.34242 2017 8 31 57996 0.2020 0.3806 0.34205 2017 9 1 57997 0.2022 0.3790 0.34170 2017 9 2 57998 0.2023 0.3775 0.34132 2017 9 3 57999 0.2024 0.3759 0.34087 2017 9 4 58000 0.2025 0.3743 0.34032 2017 9 5 58001 0.2025 0.3728 0.33962 2017 9 6 58002 0.2026 0.3712 0.33876 2017 9 7 58003 0.2025 0.3696 0.33772 2017 9 8 58004 0.2025 0.3681 0.33656 2017 9 9 58005 0.2024 0.3665 0.33533 2017 9 10 58006 0.2023 0.3649 0.33409 2017 9 11 58007 0.2022 0.3634 0.33291 2017 9 12 58008 0.2020 0.3618 0.33183 2017 9 13 58009 0.2018 0.3603 0.33086 2017 9 14 58010 0.2016 0.3587 0.32996 2017 9 15 58011 0.2014 0.3571 0.32909 2017 9 16 58012 0.2011 0.3556 0.32819 2017 9 17 58013 0.2008 0.3540 0.32720 2017 9 18 58014 0.2004 0.3525 0.32609 2017 9 19 58015 0.2001 0.3509 0.32486 2017 9 20 58016 0.1997 0.3494 0.32354 2017 9 21 58017 0.1993 0.3479 0.32219 2017 9 22 58018 0.1988 0.3463 0.32086 2017 9 23 58019 0.1983 0.3448 0.31961 2017 9 24 58020 0.1978 0.3433 0.31845 2017 9 25 58021 0.1973 0.3418 0.31740 2017 9 26 58022 0.1967 0.3403 0.31645 2017 9 27 58023 0.1961 0.3388 0.31558 2017 9 28 58024 0.1955 0.3373 0.31475 2017 9 29 58025 0.1949 0.3359 0.31393 2017 9 30 58026 0.1942 0.3344 0.31306 2017 10 1 58027 0.1935 0.3329 0.31210 2017 10 2 58028 0.1928 0.3315 0.31100 2017 10 3 58029 0.1920 0.3301 0.30975 2017 10 4 58030 0.1912 0.3286 0.30832 2017 10 5 58031 0.1904 0.3272 0.30673 2017 10 6 58032 0.1896 0.3258 0.30504 2017 10 7 58033 0.1887 0.3244 0.30332 2017 10 8 58034 0.1878 0.3231 0.30165 2017 10 9 58035 0.1869 0.3217 0.30009 2017 10 10 58036 0.1860 0.3204 0.29866 2017 10 11 58037 0.1850 0.3190 0.29734 2017 10 12 58038 0.1840 0.3177 0.29609 2017 10 13 58039 0.1830 0.3164 0.29484 2017 10 14 58040 0.1820 0.3151 0.29354 2017 10 15 58041 0.1809 0.3138 0.29214 2017 10 16 58042 0.1799 0.3126 0.29063 2017 10 17 58043 0.1788 0.3114 0.28904 2017 10 18 58044 0.1776 0.3101 0.28740 2017 10 19 58045 0.1765 0.3089 0.28577 2017 10 20 58046 0.1753 0.3077 0.28420 2017 10 21 58047 0.1741 0.3066 0.28272 2017 10 22 58048 0.1729 0.3054 0.28135 2017 10 23 58049 0.1717 0.3043 0.28010 2017 10 24 58050 0.1704 0.3032 0.27895 2017 10 25 58051 0.1691 0.3021 0.27788 2017 10 26 58052 0.1678 0.3010 0.27684 2017 10 27 58053 0.1665 0.2999 0.27578 2017 10 28 58054 0.1652 0.2989 0.27467 2017 10 29 58055 0.1638 0.2979 0.27345 2017 10 30 58056 0.1625 0.2969 0.27209 2017 10 31 58057 0.1611 0.2959 0.27058 2017 11 1 58058 0.1597 0.2950 0.26890 2017 11 2 58059 0.1583 0.2940 0.26709 2017 11 3 58060 0.1568 0.2931 0.26520 2017 11 4 58061 0.1554 0.2923 0.26333 2017 11 5 58062 0.1539 0.2914 0.26154 2017 11 6 58063 0.1524 0.2906 0.25988 2017 11 7 58064 0.1509 0.2897 0.25838 2017 11 8 58065 0.1494 0.2889 0.25698 2017 11 9 58066 0.1478 0.2882 0.25562 2017 11 10 58067 0.1463 0.2874 0.25424 2017 11 11 58068 0.1447 0.2867 0.25279 2017 11 12 58069 0.1432 0.2860 0.25127 2017 11 13 58070 0.1416 0.2853 0.24967 2017 11 14 58071 0.1400 0.2847 0.24804 2017 11 15 58072 0.1384 0.2841 0.24642 2017 11 16 58073 0.1368 0.2835 0.24485 2017 11 17 58074 0.1351 0.2829 0.24337 2017 11 18 58075 0.1335 0.2823 0.24201 2017 11 19 58076 0.1318 0.2818 0.24077 2017 11 20 58077 0.1302 0.2813 0.23965 2017 11 21 58078 0.1285 0.2809 0.23861 2017 11 22 58079 0.1269 0.2804 0.23763 2017 11 23 58080 0.1252 0.2800 0.23666 2017 11 24 58081 0.1235 0.2796 0.23564 2017 11 25 58082 0.1218 0.2792 0.23454 2017 11 26 58083 0.1201 0.2789 0.23331 2017 11 27 58084 0.1184 0.2786 0.23194 2017 11 28 58085 0.1167 0.2783 0.23040 2017 11 29 58086 0.1150 0.2781 0.22872 2017 11 30 58087 0.1132 0.2778 0.22693 2017 12 1 58088 0.1115 0.2776 0.22510 2017 12 2 58089 0.1098 0.2774 0.22330 2017 12 3 58090 0.1081 0.2773 0.22160 2017 12 4 58091 0.1063 0.2772 0.22005 2017 12 5 58092 0.1046 0.2771 0.21864 2017 12 6 58093 0.1029 0.2770 0.21730 2017 12 7 58094 0.1011 0.2770 0.21599 2017 12 8 58095 0.0994 0.2770 0.21462 2017 12 9 58096 0.0977 0.2770 0.21317 2017 12 10 58097 0.0960 0.2770 0.21164 2017 12 11 58098 0.0942 0.2771 0.21006 2017 12 12 58099 0.0925 0.2772 0.20846 2017 12 13 58100 0.0908 0.2773 0.20689 2017 12 14 58101 0.0890 0.2775 0.20542 2017 12 15 58102 0.0873 0.2776 0.20407 2017 12 16 58103 0.0856 0.2778 0.20286 2017 12 17 58104 0.0839 0.2781 0.20181 2017 12 18 58105 0.0822 0.2783 0.20088 2017 12 19 58106 0.0805 0.2786 0.20005 2017 12 20 58107 0.0788 0.2789 0.19927 2017 12 21 58108 0.0771 0.2793 0.19851 2017 12 22 58109 0.0755 0.2797 0.19772 2017 12 23 58110 0.0738 0.2800 0.19687 2017 12 24 58111 0.0721 0.2805 0.19590 2017 12 25 58112 0.0705 0.2809 0.19478 2017 12 26 58113 0.0688 0.2814 0.19351 2017 12 27 58114 0.0672 0.2819 0.19209 2017 12 28 58115 0.0656 0.2824 0.19056 2017 12 29 58116 0.0640 0.2830 0.18904 2017 12 30 58117 0.0624 0.2836 0.18760 2017 12 31 58118 0.0608 0.2842 0.18622 2018 1 1 58119 0.0592 0.2848 0.18495 2018 1 2 58120 0.0576 0.2854 0.18376 2018 1 3 58121 0.0561 0.2861 0.18256 2018 1 4 58122 0.0545 0.2868 0.18131 2018 1 5 58123 0.0530 0.2876 0.17997 2018 1 6 58124 0.0515 0.2883 0.17858 2018 1 7 58125 0.0500 0.2891 0.17715 2018 1 8 58126 0.0485 0.2899 0.17573 2018 1 9 58127 0.0470 0.2907 0.17439 2018 1 10 58128 0.0456 0.2916 0.17318 2018 1 11 58129 0.0442 0.2924 0.17210 2018 1 12 58130 0.0428 0.2933 0.17112 2018 1 13 58131 0.0414 0.2943 0.17026 2018 1 14 58132 0.0400 0.2952 0.16948 2018 1 15 58133 0.0386 0.2962 0.16878 2018 1 16 58134 0.0373 0.2972 0.16814 2018 1 17 58135 0.0359 0.2982 0.16744 2018 1 18 58136 0.0346 0.2992 0.16665 2018 1 19 58137 0.0334 0.3002 0.16573 2018 1 20 58138 0.0321 0.3013 0.16466 2018 1 21 58139 0.0308 0.3024 0.16349 2018 1 22 58140 0.0296 0.3035 0.16223 2018 1 23 58141 0.0284 0.3046 0.16082 2018 1 24 58142 0.0272 0.3058 0.15935 2018 1 25 58143 0.0261 0.3070 0.15788 2018 1 26 58144 0.0249 0.3082 0.15644 2018 1 27 58145 0.0238 0.3094 0.15509 2018 1 28 58146 0.0227 0.3106 0.15386 2018 1 29 58147 0.0217 0.3118 0.15270 2018 1 30 58148 0.0206 0.3131 0.15161 2018 1 31 58149 0.0196 0.3144 0.15051 2018 2 1 58150 0.0186 0.3157 0.14932 2018 2 2 58151 0.0176 0.3170 0.14797 2018 2 3 58152 0.0167 0.3183 0.14649 2018 2 4 58153 0.0158 0.3196 0.14495 2018 2 5 58154 0.0149 0.3210 0.14346 2018 2 6 58155 0.0140 0.3224 0.14196 2018 2 7 58156 0.0132 0.3238 0.14051 2018 2 8 58157 0.0124 0.3252 0.13917 2018 2 9 58158 0.0116 0.3266 0.13797 2018 2 10 58159 0.0108 0.3280 0.13682 2018 2 11 58160 0.0101 0.3294 0.13575 2018 2 12 58161 0.0094 0.3309 0.13471 2018 2 13 58162 0.0087 0.3324 0.13367 2018 2 14 58163 0.0080 0.3338 0.13261 2018 2 15 58164 0.0074 0.3353 0.13150 2018 2 16 58165 0.0068 0.3368 0.13031 2018 2 17 58166 0.0062 0.3383 0.12900 2018 2 18 58167 0.0057 0.3398 0.12754 2018 2 19 58168 0.0052 0.3414 0.12594 2018 2 20 58169 0.0047 0.3429 0.12427 2018 2 21 58170 0.0042 0.3444 0.12256 2018 2 22 58171 0.0038 0.3460 0.12080 2018 2 23 58172 0.0034 0.3476 0.11909 2018 2 24 58173 0.0030 0.3491 0.11746 2018 2 25 58174 0.0027 0.3507 0.11595 2018 2 26 58175 0.0024 0.3523 0.11448 2018 2 27 58176 0.0021 0.3539 0.11300 2018 2 28 58177 0.0019 0.3554 0.11144 2018 3 1 58178 0.0016 0.3570 0.10971 2018 3 2 58179 0.0014 0.3586 0.10781 2018 3 3 58180 0.0013 0.3602 0.10581 2018 3 4 58181 0.0012 0.3618 0.10381 2018 3 5 58182 0.0011 0.3634 0.10183 2018 3 6 58183 0.0010 0.3651 0.09997 2018 3 7 58184 0.0009 0.3667 0.09827 2018 3 8 58185 0.0009 0.3683 0.09667 2018 3 9 58186 0.0009 0.3699 0.09514 2018 3 10 58187 0.0010 0.3715 0.09363 2018 3 11 58188 0.0011 0.3731 0.09216 2018 3 12 58189 0.0012 0.3747 0.09067 2018 3 13 58190 0.0013 0.3763 0.08919 2018 3 14 58191 0.0015 0.3779 0.08764 2018 3 15 58192 0.0017 0.3796 0.08600 2018 3 16 58193 0.0019 0.3812 0.08422 2018 3 17 58194 0.0022 0.3828 0.08229 2018 3 18 58195 0.0025 0.3844 0.08023 2018 3 19 58196 0.0028 0.3860 0.07810 2018 3 20 58197 0.0031 0.3875 0.07599 2018 3 21 58198 0.0035 0.3891 0.07395 2018 3 22 58199 0.0039 0.3907 0.07199 2018 3 23 58200 0.0043 0.3923 0.07017 2018 3 24 58201 0.0048 0.3938 0.06851 2018 3 25 58202 0.0053 0.3954 0.06698 2018 3 26 58203 0.0058 0.3970 0.06551 2018 3 27 58204 0.0064 0.3985 0.06401 2018 3 28 58205 0.0069 0.4000 0.06244 2018 3 29 58206 0.0075 0.4016 0.06072 2018 3 30 58207 0.0082 0.4031 0.05881 2018 3 31 58208 0.0088 0.4046 0.05678 2018 4 1 58209 0.0095 0.4061 0.05475 2018 4 2 58210 0.0102 0.4076 0.05279 2018 4 3 58211 0.0110 0.4091 0.05098 2018 4 4 58212 0.0118 0.4105 0.04932 2018 4 5 58213 0.0126 0.4120 0.04782 2018 4 6 58214 0.0134 0.4134 0.04645 2018 4 7 58215 0.0142 0.4149 0.04514 2018 4 8 58216 0.0151 0.4163 0.04379 2018 4 9 58217 0.0160 0.4177 0.04243 2018 4 10 58218 0.0169 0.4191 0.04103 2018 4 11 58219 0.0179 0.4205 0.03947 2018 4 12 58220 0.0189 0.4218 0.03772 2018 4 13 58221 0.0199 0.4232 0.03584 2018 4 14 58222 0.0209 0.4245 0.03384 2018 4 15 58223 0.0220 0.4258 0.03174 2018 4 16 58224 0.0230 0.4271 0.02954 2018 4 17 58225 0.0241 0.4284 0.02731 2018 4 18 58226 0.0253 0.4297 0.02513 2018 4 19 58227 0.0264 0.4309 0.02302 2018 4 20 58228 0.0276 0.4322 0.02110 2018 4 21 58229 0.0288 0.4334 0.01935 2018 4 22 58230 0.0300 0.4346 0.01763 2018 4 23 58231 0.0312 0.4357 0.01592 2018 4 24 58232 0.0325 0.4369 0.01419 2018 4 25 58233 0.0337 0.4380 0.01237 2018 4 26 58234 0.0350 0.4392 0.01048 2018 4 27 58235 0.0363 0.4402 0.00857 2018 4 28 58236 0.0377 0.4413 0.00669 2018 4 29 58237 0.0390 0.4424 0.00487 2018 4 30 58238 0.0404 0.4434 0.00320 2018 5 1 58239 0.0418 0.4444 0.00171 2018 5 2 58240 0.0432 0.4454 0.00036 2018 5 3 58241 0.0446 0.4464 -0.00084 2018 5 4 58242 0.0461 0.4473 -0.00196 2018 5 5 58243 0.0475 0.4483 -0.00298 2018 5 6 58244 0.0490 0.4492 -0.00399 2018 5 7 58245 0.0505 0.4500 -0.00507 2018 5 8 58246 0.0520 0.4509 -0.00622 2018 5 9 58247 0.0535 0.4517 -0.00752 2018 5 10 58248 0.0551 0.4525 -0.00896 2018 5 11 58249 0.0566 0.4533 -0.01055 2018 5 12 58250 0.0582 0.4541 -0.01228 2018 5 13 58251 0.0598 0.4548 -0.01416 2018 5 14 58252 0.0614 0.4555 -0.01610 2018 5 15 58253 0.0630 0.4562 -0.01800 2018 5 16 58254 0.0646 0.4568 -0.01980 2018 5 17 58255 0.0662 0.4575 -0.02144 2018 5 18 58256 0.0679 0.4581 -0.02298 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) 57865 -97.46 0.30 -12.89 0.04 57866 -97.74 0.30 -13.03 0.04 57867 -97.81 0.30 -12.99 0.04 57868 -97.64 0.30 -12.77 0.04 57869 -97.66 0.30 -12.62 0.02 57870 -98.10 0.30 -12.73 0.02 57871 -98.76 0.30 -13.04 0.02 57872 -99.20 0.30 -13.29 0.15 57873 -99.23 0.30 -13.31 0.15 57874 -98.99 0.30 -13.20 0.15 57875 -98.78 0.30 -13.07 0.15 57876 -98.75 0.30 -12.99 0.15 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 57865 -0.151 0.119 -0.003 0.040 57866 -0.141 0.119 -0.054 0.040 57867 -0.121 0.119 -0.051 0.040 57868 -0.111 0.119 -0.021 0.040 57869 -0.131 0.119 -0.001 0.020 57870 -0.158 0.119 0.029 0.020 57871 -0.186 0.119 0.053 0.020 57872 -0.204 0.119 0.058 0.150 57873 -0.218 0.119 0.070 0.150 57874 -0.225 0.119 0.080 0.150 57875 -0.229 0.119 0.114 0.150 57876 -0.230 0.119 0.139 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 (2010).