********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 25 May 2017 Vol. XXX No. 021 ______________________________________________________________________ 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 = +0.3 seconds beginning 29 Jun 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. * * * * As of Bulletin A Vol. XXX, No. 020, 18 May 2017, we have * * incorporated the new USNO VLBI solutions -- usno2017a.eops and * * usno2017a.eopi. The effect appears to be less than 0.1 mas in * * polar motion and 10 us in UT1-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 19 57892 0.07251 .00009 0.45180 .00009 0.398574 0.000012 17 5 20 57893 0.07443 .00009 0.45284 .00009 0.397275 0.000013 17 5 21 57894 0.07639 .00009 0.45372 .00009 0.395845 0.000009 17 5 22 57895 0.07826 .00009 0.45448 .00009 0.394278 0.000006 17 5 23 57896 0.07977 .00009 0.45509 .00009 0.392608 0.000006 17 5 24 57897 0.08110 .00009 0.45547 .00009 0.390914 0.000006 17 5 25 57898 0.08242 .00009 0.45568 .00009 0.389288 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 = 0.1216 - 0.0019 cos A + 0.1042 sin A - 0.0368 cos C - 0.0131 sin C y = 0.3655 + 0.0970 cos A + 0.0079 sin A - 0.0131 cos C + 0.0368 sin C UT1-UTC = 0.4174 - 0.00115 (MJD - 57906) - (UT2-UT1) where A = 2*pi*(MJD-57898)/365.25 and C = 2*pi*(MJD-57898)/435. TAI-UTC(MJD 57899) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-57898)**0.80 S t = 0.00025 (MJD-57898)**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 26 57899 0.0839 0.4559 0.38783 2017 5 27 57900 0.0854 0.4560 0.38658 2017 5 28 57901 0.0870 0.4562 0.38547 2017 5 29 57902 0.0886 0.4564 0.38443 2017 5 30 57903 0.0903 0.4567 0.38336 2017 5 31 57904 0.0921 0.4571 0.38223 2017 6 1 57905 0.0938 0.4574 0.38103 2017 6 2 57906 0.0955 0.4577 0.37980 2017 6 3 57907 0.0972 0.4579 0.37858 2017 6 4 57908 0.0989 0.4580 0.37742 2017 6 5 57909 0.1006 0.4581 0.37636 2017 6 6 57910 0.1022 0.4583 0.37539 2017 6 7 57911 0.1039 0.4584 0.37453 2017 6 8 57912 0.1057 0.4584 0.37380 2017 6 9 57913 0.1074 0.4585 0.37321 2017 6 10 57914 0.1091 0.4586 0.37271 2017 6 11 57915 0.1108 0.4586 0.37226 2017 6 12 57916 0.1124 0.4586 0.37184 2017 6 13 57917 0.1141 0.4585 0.37139 2017 6 14 57918 0.1157 0.4584 0.37090 2017 6 15 57919 0.1173 0.4582 0.37031 2017 6 16 57920 0.1190 0.4581 0.36961 2017 6 17 57921 0.1206 0.4579 0.36879 2017 6 18 57922 0.1222 0.4577 0.36786 2017 6 19 57923 0.1239 0.4574 0.36687 2017 6 20 57924 0.1255 0.4572 0.36585 2017 6 21 57925 0.1271 0.4569 0.36489 2017 6 22 57926 0.1288 0.4566 0.36402 2017 6 23 57927 0.1304 0.4563 0.36329 2017 6 24 57928 0.1320 0.4559 0.36268 2017 6 25 57929 0.1336 0.4555 0.36213 2017 6 26 57930 0.1352 0.4551 0.36159 2017 6 27 57931 0.1367 0.4547 0.36100 2017 6 28 57932 0.1383 0.4542 0.36037 2017 6 29 57933 0.1399 0.4537 0.35971 2017 6 30 57934 0.1414 0.4532 0.35905 2017 7 1 57935 0.1430 0.4527 0.35844 2017 7 2 57936 0.1445 0.4522 0.35791 2017 7 3 57937 0.1460 0.4516 0.35748 2017 7 4 57938 0.1475 0.4510 0.35717 2017 7 5 57939 0.1490 0.4503 0.35699 2017 7 6 57940 0.1505 0.4497 0.35693 2017 7 7 57941 0.1519 0.4490 0.35697 2017 7 8 57942 0.1534 0.4483 0.35708 2017 7 9 57943 0.1548 0.4476 0.35721 2017 7 10 57944 0.1562 0.4468 0.35734 2017 7 11 57945 0.1576 0.4460 0.35741 2017 7 12 57946 0.1590 0.4452 0.35738 2017 7 13 57947 0.1604 0.4444 0.35722 2017 7 14 57948 0.1618 0.4436 0.35694 2017 7 15 57949 0.1631 0.4427 0.35654 2017 7 16 57950 0.1644 0.4418 0.35605 2017 7 17 57951 0.1657 0.4409 0.35554 2017 7 18 57952 0.1670 0.4400 0.35505 2017 7 19 57953 0.1683 0.4390 0.35463 2017 7 20 57954 0.1695 0.4381 0.35434 2017 7 21 57955 0.1708 0.4371 0.35415 2017 7 22 57956 0.1720 0.4361 0.35404 2017 7 23 57957 0.1732 0.4350 0.35393 2017 7 24 57958 0.1743 0.4340 0.35376 2017 7 25 57959 0.1755 0.4329 0.35350 2017 7 26 57960 0.1766 0.4318 0.35314 2017 7 27 57961 0.1777 0.4307 0.35272 2017 7 28 57962 0.1788 0.4296 0.35228 2017 7 29 57963 0.1799 0.4285 0.35188 2017 7 30 57964 0.1809 0.4273 0.35155 2017 7 31 57965 0.1819 0.4261 0.35131 2017 8 1 57966 0.1829 0.4249 0.35119 2017 8 2 57967 0.1839 0.4237 0.35117 2017 8 3 57968 0.1849 0.4225 0.35123 2017 8 4 57969 0.1858 0.4212 0.35136 2017 8 5 57970 0.1867 0.4200 0.35150 2017 8 6 57971 0.1876 0.4187 0.35162 2017 8 7 57972 0.1884 0.4174 0.35166 2017 8 8 57973 0.1892 0.4161 0.35159 2017 8 9 57974 0.1900 0.4148 0.35138 2017 8 10 57975 0.1908 0.4135 0.35101 2017 8 11 57976 0.1916 0.4121 0.35050 2017 8 12 57977 0.1923 0.4108 0.34988 2017 8 13 57978 0.1930 0.4094 0.34920 2017 8 14 57979 0.1937 0.4080 0.34853 2017 8 15 57980 0.1943 0.4066 0.34791 2017 8 16 57981 0.1949 0.4052 0.34737 2017 8 17 57982 0.1955 0.4038 0.34693 2017 8 18 57983 0.1961 0.4024 0.34654 2017 8 19 57984 0.1966 0.4010 0.34615 2017 8 20 57985 0.1972 0.3995 0.34572 2017 8 21 57986 0.1976 0.3981 0.34517 2017 8 22 57987 0.1981 0.3966 0.34451 2017 8 23 57988 0.1985 0.3951 0.34374 2017 8 24 57989 0.1989 0.3937 0.34292 2017 8 25 57990 0.1993 0.3922 0.34210 2017 8 26 57991 0.1996 0.3907 0.34133 2017 8 27 57992 0.2000 0.3892 0.34064 2017 8 28 57993 0.2002 0.3877 0.34004 2017 8 29 57994 0.2005 0.3862 0.33955 2017 8 30 57995 0.2007 0.3847 0.33915 2017 8 31 57996 0.2009 0.3831 0.33880 2017 9 1 57997 0.2011 0.3816 0.33847 2017 9 2 57998 0.2013 0.3801 0.33811 2017 9 3 57999 0.2014 0.3786 0.33768 2017 9 4 58000 0.2015 0.3770 0.33714 2017 9 5 58001 0.2015 0.3755 0.33644 2017 9 6 58002 0.2016 0.3740 0.33558 2017 9 7 58003 0.2016 0.3724 0.33455 2017 9 8 58004 0.2015 0.3709 0.33339 2017 9 9 58005 0.2015 0.3693 0.33216 2017 9 10 58006 0.2014 0.3678 0.33092 2017 9 11 58007 0.2013 0.3663 0.32974 2017 9 12 58008 0.2011 0.3647 0.32866 2017 9 13 58009 0.2010 0.3632 0.32768 2017 9 14 58010 0.2008 0.3616 0.32678 2017 9 15 58011 0.2005 0.3601 0.32590 2017 9 16 58012 0.2003 0.3586 0.32499 2017 9 17 58013 0.2000 0.3571 0.32399 2017 9 18 58014 0.1997 0.3555 0.32287 2017 9 19 58015 0.1993 0.3540 0.32162 2017 9 20 58016 0.1990 0.3525 0.32030 2017 9 21 58017 0.1986 0.3510 0.31894 2017 9 22 58018 0.1981 0.3495 0.31760 2017 9 23 58019 0.1977 0.3480 0.31633 2017 9 24 58020 0.1972 0.3465 0.31516 2017 9 25 58021 0.1967 0.3450 0.31410 2017 9 26 58022 0.1961 0.3435 0.31315 2017 9 27 58023 0.1956 0.3421 0.31227 2017 9 28 58024 0.1950 0.3406 0.31144 2017 9 29 58025 0.1943 0.3391 0.31061 2017 9 30 58026 0.1937 0.3377 0.30974 2017 10 1 58027 0.1930 0.3362 0.30878 2017 10 2 58028 0.1923 0.3348 0.30768 2017 10 3 58029 0.1916 0.3334 0.30642 2017 10 4 58030 0.1908 0.3320 0.30499 2017 10 5 58031 0.1901 0.3306 0.30340 2017 10 6 58032 0.1893 0.3292 0.30171 2017 10 7 58033 0.1884 0.3279 0.29998 2017 10 8 58034 0.1876 0.3265 0.29830 2017 10 9 58035 0.1867 0.3251 0.29673 2017 10 10 58036 0.1858 0.3238 0.29529 2017 10 11 58037 0.1848 0.3225 0.29397 2017 10 12 58038 0.1839 0.3212 0.29270 2017 10 13 58039 0.1829 0.3199 0.29144 2017 10 14 58040 0.1819 0.3186 0.29013 2017 10 15 58041 0.1809 0.3174 0.28872 2017 10 16 58042 0.1798 0.3161 0.28720 2017 10 17 58043 0.1788 0.3149 0.28560 2017 10 18 58044 0.1777 0.3137 0.28395 2017 10 19 58045 0.1766 0.3125 0.28231 2017 10 20 58046 0.1754 0.3113 0.28073 2017 10 21 58047 0.1743 0.3101 0.27925 2017 10 22 58048 0.1731 0.3090 0.27788 2017 10 23 58049 0.1719 0.3078 0.27662 2017 10 24 58050 0.1707 0.3067 0.27548 2017 10 25 58051 0.1694 0.3056 0.27440 2017 10 26 58052 0.1682 0.3046 0.27336 2017 10 27 58053 0.1669 0.3035 0.27231 2017 10 28 58054 0.1656 0.3025 0.27120 2017 10 29 58055 0.1643 0.3015 0.26999 2017 10 30 58056 0.1629 0.3005 0.26864 2017 10 31 58057 0.1616 0.2995 0.26713 2017 11 1 58058 0.1602 0.2986 0.26546 2017 11 2 58059 0.1588 0.2976 0.26366 2017 11 3 58060 0.1574 0.2967 0.26178 2017 11 4 58061 0.1560 0.2958 0.25992 2017 11 5 58062 0.1545 0.2950 0.25814 2017 11 6 58063 0.1531 0.2941 0.25650 2017 11 7 58064 0.1516 0.2933 0.25500 2017 11 8 58065 0.1501 0.2925 0.25361 2017 11 9 58066 0.1487 0.2917 0.25226 2017 11 10 58067 0.1471 0.2910 0.25089 2017 11 11 58068 0.1456 0.2902 0.24946 2017 11 12 58069 0.1441 0.2895 0.24794 2017 11 13 58070 0.1425 0.2889 0.24636 2017 11 14 58071 0.1410 0.2882 0.24474 2017 11 15 58072 0.1394 0.2876 0.24313 2017 11 16 58073 0.1378 0.2870 0.24157 2017 11 17 58074 0.1362 0.2864 0.24010 2017 11 18 58075 0.1346 0.2858 0.23875 2017 11 19 58076 0.1330 0.2853 0.23752 2017 11 20 58077 0.1314 0.2848 0.23642 2017 11 21 58078 0.1298 0.2843 0.23541 2017 11 22 58079 0.1281 0.2838 0.23446 2017 11 23 58080 0.1265 0.2834 0.23353 2017 11 24 58081 0.1249 0.2830 0.23258 2017 11 25 58082 0.1232 0.2826 0.23156 2017 11 26 58083 0.1215 0.2822 0.23042 2017 11 27 58084 0.1199 0.2819 0.22916 2017 11 28 58085 0.1182 0.2816 0.22774 2017 11 29 58086 0.1165 0.2813 0.22618 2017 11 30 58087 0.1148 0.2811 0.22452 2017 12 1 58088 0.1131 0.2809 0.22280 2017 12 2 58089 0.1115 0.2807 0.22111 2017 12 3 58090 0.1098 0.2805 0.21952 2017 12 4 58091 0.1081 0.2803 0.21804 2017 12 5 58092 0.1064 0.2802 0.21668 2017 12 6 58093 0.1047 0.2801 0.21538 2017 12 7 58094 0.1030 0.2801 0.21407 2017 12 8 58095 0.1013 0.2800 0.21269 2017 12 9 58096 0.0996 0.2800 0.21122 2017 12 10 58097 0.0979 0.2800 0.20968 2017 12 11 58098 0.0962 0.2801 0.20810 2017 12 12 58099 0.0945 0.2802 0.20653 2017 12 13 58100 0.0928 0.2803 0.20501 2017 12 14 58101 0.0911 0.2804 0.20360 2017 12 15 58102 0.0895 0.2805 0.20232 2017 12 16 58103 0.0878 0.2807 0.20120 2017 12 17 58104 0.0861 0.2809 0.20021 2017 12 18 58105 0.0844 0.2811 0.19934 2017 12 19 58106 0.0828 0.2814 0.19855 2017 12 20 58107 0.0811 0.2817 0.19777 2017 12 21 58108 0.0795 0.2820 0.19695 2017 12 22 58109 0.0778 0.2823 0.19604 2017 12 23 58110 0.0762 0.2827 0.19498 2017 12 24 58111 0.0745 0.2831 0.19377 2017 12 25 58112 0.0729 0.2835 0.19241 2017 12 26 58113 0.0713 0.2839 0.19092 2017 12 27 58114 0.0697 0.2844 0.18932 2017 12 28 58115 0.0681 0.2849 0.18768 2017 12 29 58116 0.0665 0.2854 0.18607 2017 12 30 58117 0.0650 0.2859 0.18455 2017 12 31 58118 0.0634 0.2865 0.18316 2018 1 1 58119 0.0618 0.2871 0.18190 2018 1 2 58120 0.0603 0.2877 0.18074 2018 1 3 58121 0.0588 0.2883 0.17961 2018 1 4 58122 0.0573 0.2890 0.17844 2018 1 5 58123 0.0558 0.2897 0.17721 2018 1 6 58124 0.0543 0.2904 0.17594 2018 1 7 58125 0.0528 0.2912 0.17460 2018 1 8 58126 0.0514 0.2919 0.17323 2018 1 9 58127 0.0499 0.2927 0.17190 2018 1 10 58128 0.0485 0.2935 0.17061 2018 1 11 58129 0.0471 0.2943 0.16939 2018 1 12 58130 0.0457 0.2952 0.16831 2018 1 13 58131 0.0443 0.2961 0.16737 2018 1 14 58132 0.0430 0.2970 0.16649 2018 1 15 58133 0.0416 0.2979 0.16567 2018 1 16 58134 0.0403 0.2988 0.16490 2018 1 17 58135 0.0390 0.2998 0.16410 2018 1 18 58136 0.0377 0.3008 0.16324 2018 1 19 58137 0.0364 0.3018 0.16231 2018 1 20 58138 0.0352 0.3028 0.16129 2018 1 21 58139 0.0340 0.3038 0.16015 2018 1 22 58140 0.0328 0.3049 0.15890 2018 1 23 58141 0.0316 0.3060 0.15757 2018 1 24 58142 0.0304 0.3071 0.15622 2018 1 25 58143 0.0293 0.3082 0.15486 2018 1 26 58144 0.0282 0.3094 0.15351 2018 1 27 58145 0.0271 0.3105 0.15222 2018 1 28 58146 0.0260 0.3117 0.15101 2018 1 29 58147 0.0249 0.3129 0.14989 2018 1 30 58148 0.0239 0.3141 0.14879 2018 1 31 58149 0.0229 0.3153 0.14760 2018 2 1 58150 0.0219 0.3166 0.14625 2018 2 2 58151 0.0209 0.3179 0.14474 2018 2 3 58152 0.0200 0.3191 0.14309 2018 2 4 58153 0.0191 0.3204 0.14143 2018 2 5 58154 0.0182 0.3217 0.13981 2018 2 6 58155 0.0174 0.3231 0.13825 2018 2 7 58156 0.0165 0.3244 0.13679 2018 2 8 58157 0.0157 0.3257 0.13550 2018 2 9 58158 0.0149 0.3271 0.13433 2018 2 10 58159 0.0142 0.3285 0.13328 2018 2 11 58160 0.0134 0.3299 0.13234 2018 2 12 58161 0.0127 0.3313 0.13145 2018 2 13 58162 0.0121 0.3327 0.13060 2018 2 14 58163 0.0114 0.3341 0.12975 2018 2 15 58164 0.0108 0.3356 0.12882 2018 2 16 58165 0.0102 0.3370 0.12775 2018 2 17 58166 0.0096 0.3385 0.12651 2018 2 18 58167 0.0091 0.3399 0.12513 2018 2 19 58168 0.0086 0.3414 0.12366 2018 2 20 58169 0.0081 0.3429 0.12202 2018 2 21 58170 0.0076 0.3444 0.12030 2018 2 22 58171 0.0072 0.3459 0.11861 2018 2 23 58172 0.0068 0.3474 0.11699 2018 2 24 58173 0.0064 0.3489 0.11540 2018 2 25 58174 0.0061 0.3504 0.11389 2018 2 26 58175 0.0058 0.3520 0.11240 2018 2 27 58176 0.0055 0.3535 0.11088 2018 2 28 58177 0.0052 0.3550 0.10929 2018 3 1 58178 0.0050 0.3566 0.10760 2018 3 2 58179 0.0048 0.3581 0.10581 2018 3 3 58180 0.0046 0.3597 0.10393 2018 3 4 58181 0.0045 0.3612 0.10202 2018 3 5 58182 0.0044 0.3628 0.10012 2018 3 6 58183 0.0043 0.3644 0.09834 2018 3 7 58184 0.0042 0.3659 0.09666 2018 3 8 58185 0.0042 0.3675 0.09505 2018 3 9 58186 0.0042 0.3690 0.09354 2018 3 10 58187 0.0042 0.3706 0.09213 2018 3 11 58188 0.0043 0.3722 0.09081 2018 3 12 58189 0.0044 0.3737 0.08953 2018 3 13 58190 0.0045 0.3753 0.08823 2018 3 14 58191 0.0047 0.3769 0.08687 2018 3 15 58192 0.0048 0.3784 0.08538 2018 3 16 58193 0.0051 0.3800 0.08373 2018 3 17 58194 0.0053 0.3816 0.08192 2018 3 18 58195 0.0056 0.3831 0.08002 2018 3 19 58196 0.0059 0.3847 0.07801 2018 3 20 58197 0.0062 0.3862 0.07598 2018 3 21 58198 0.0065 0.3878 0.07401 2018 3 22 58199 0.0069 0.3893 0.07211 2018 3 23 58200 0.0073 0.3908 0.07024 2018 3 24 58201 0.0078 0.3923 0.06841 2018 3 25 58202 0.0082 0.3939 0.06661 2018 3 26 58203 0.0087 0.3954 0.06479 2018 3 27 58204 0.0092 0.3969 0.06293 2018 3 28 58205 0.0098 0.3984 0.06097 2018 3 29 58206 0.0104 0.3999 0.05888 2018 3 30 58207 0.0110 0.4014 0.05668 2018 3 31 58208 0.0116 0.4028 0.05441 2018 4 1 58209 0.0123 0.4043 0.05216 2018 4 2 58210 0.0130 0.4057 0.04999 2018 4 3 58211 0.0137 0.4072 0.04800 2018 4 4 58212 0.0144 0.4086 0.04618 2018 4 5 58213 0.0152 0.4100 0.04451 2018 4 6 58214 0.0160 0.4115 0.04300 2018 4 7 58215 0.0168 0.4129 0.04164 2018 4 8 58216 0.0176 0.4142 0.04039 2018 4 9 58217 0.0185 0.4156 0.03920 2018 4 10 58218 0.0194 0.4170 0.03801 2018 4 11 58219 0.0203 0.4183 0.03676 2018 4 12 58220 0.0212 0.4196 0.03538 2018 4 13 58221 0.0222 0.4210 0.03379 2018 4 14 58222 0.0232 0.4223 0.03203 2018 4 15 58223 0.0242 0.4236 0.03014 2018 4 16 58224 0.0252 0.4248 0.02819 2018 4 17 58225 0.0263 0.4261 0.02629 2018 4 18 58226 0.0274 0.4273 0.02448 2018 4 19 58227 0.0285 0.4285 0.02282 2018 4 20 58228 0.0296 0.4298 0.02129 2018 4 21 58229 0.0308 0.4309 0.01982 2018 4 22 58230 0.0319 0.4321 0.01832 2018 4 23 58231 0.0331 0.4333 0.01679 2018 4 24 58232 0.0343 0.4344 0.01517 2018 4 25 58233 0.0356 0.4355 0.01339 2018 4 26 58234 0.0368 0.4366 0.01142 2018 4 27 58235 0.0381 0.4377 0.00940 2018 4 28 58236 0.0394 0.4387 0.00738 2018 4 29 58237 0.0407 0.4398 0.00543 2018 4 30 58238 0.0420 0.4408 0.00353 2018 5 1 58239 0.0433 0.4418 0.00174 2018 5 2 58240 0.0447 0.4428 0.00006 2018 5 3 58241 0.0461 0.4437 -0.00153 2018 5 4 58242 0.0475 0.4446 -0.00295 2018 5 5 58243 0.0489 0.4456 -0.00422 2018 5 6 58244 0.0503 0.4464 -0.00546 2018 5 7 58245 0.0518 0.4473 -0.00670 2018 5 8 58246 0.0532 0.4482 -0.00794 2018 5 9 58247 0.0547 0.4490 -0.00925 2018 5 10 58248 0.0562 0.4498 -0.01064 2018 5 11 58249 0.0577 0.4505 -0.01212 2018 5 12 58250 0.0592 0.4513 -0.01367 2018 5 13 58251 0.0607 0.4520 -0.01529 2018 5 14 58252 0.0623 0.4527 -0.01688 2018 5 15 58253 0.0638 0.4534 -0.01839 2018 5 16 58254 0.0654 0.4541 -0.01978 2018 5 17 58255 0.0669 0.4547 -0.02103 2018 5 18 58256 0.0685 0.4553 -0.02218 2018 5 19 58257 0.0701 0.4559 -0.02324 2018 5 20 58258 0.0717 0.4564 -0.02432 2018 5 21 58259 0.0733 0.4569 -0.02549 2018 5 22 58260 0.0750 0.4574 -0.02677 2018 5 23 58261 0.0766 0.4579 -0.02818 2018 5 24 58262 0.0782 0.4584 -0.02968 2018 5 25 58263 0.0799 0.4588 -0.03121 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) 57877 -98.63 0.30 -13.01 0.03 57878 -98.47 0.30 -13.04 0.03 57879 -98.20 0.30 -13.09 0.03 57880 -98.00 0.30 -13.07 0.03 57881 -98.02 0.30 -12.92 0.03 57882 -98.23 0.30 -12.69 0.15 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 57877 -0.160 0.119 0.097 0.030 57878 -0.119 0.119 0.090 0.030 57879 -0.093 0.119 0.091 0.030 57880 -0.085 0.119 0.104 0.030 57881 -0.086 0.119 0.117 0.030 57882 -0.090 0.119 0.126 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).