********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 6 April 2017 Vol. XXX No. 014 ______________________________________________________________________ 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. * * * * 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 3 31 57843 0.00509 .00009 0.37632 .00009 0.472189 0.000015 17 4 1 57844 0.00530 .00009 0.37765 .00009 0.470469 0.000014 17 4 2 57845 0.00574 .00009 0.37894 .00009 0.468895 0.000015 17 4 3 57846 0.00630 .00009 0.37991 .00009 0.467473 0.000017 17 4 4 57847 0.00719 .00009 0.38097 .00009 0.466123 0.000018 17 4 5 57848 0.00833 .00009 0.38259 .00009 0.464787 0.000017 17 4 6 57849 0.00953 .00009 0.38457 .00009 0.463416 0.000018 IERS Final Values MJD x y UT1-UTC " " s 17 2 2 57786 0.0308 0.2846 0.55271 17 2 3 57787 0.0305 0.2856 0.55127 17 2 4 57788 0.0301 0.2868 0.54984 17 2 5 57789 0.0293 0.2883 0.54847 17 2 6 57790 0.0280 0.2897 0.54721 17 2 7 57791 0.0258 0.2909 0.54597 17 2 8 57792 0.0235 0.2920 0.54478 17 2 9 57793 0.0214 0.2931 0.54356 17 2 10 57794 0.0197 0.2941 0.54227 17 2 11 57795 0.0182 0.2950 0.54088 17 2 12 57796 0.0166 0.2962 0.53930 17 2 13 57797 0.0150 0.2970 0.53768 17 2 14 57798 0.0136 0.2980 0.53601 17 2 15 57799 0.0122 0.2989 0.53431 17 2 16 57800 0.0107 0.2999 0.53270 17 2 17 57801 0.0091 0.3006 0.53119 17 2 18 57802 0.0080 0.3014 0.52980 17 2 19 57803 0.0077 0.3029 0.52863 17 2 20 57804 0.0073 0.3047 0.52757 17 2 21 57805 0.0069 0.3068 0.52657 17 2 22 57806 0.0063 0.3090 0.52571 17 2 23 57807 0.0063 0.3110 0.52476 17 2 24 57808 0.0065 0.3134 0.52369 17 2 25 57809 0.0064 0.3159 0.52263 17 2 26 57810 0.0059 0.3176 0.52141 17 2 27 57811 0.0050 0.3192 0.52004 17 2 28 57812 0.0045 0.3207 0.51858 17 3 1 57813 0.0042 0.3227 0.51692 _______________________________________________________________________ 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 = 0.1117 - 0.0673 cos A + 0.0563 sin A - 0.0366 cos C - 0.0310 sin C y = 0.3682 + 0.0499 cos A + 0.0635 sin A - 0.0310 cos C + 0.0366 sin C UT1-UTC = 0.4889 - 0.00117 (MJD - 57857) - (UT2-UT1) where A = 2*pi*(MJD-57849)/365.25 and C = 2*pi*(MJD-57849)/435. TAI-UTC(MJD 57850) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-57849)**0.80 S t = 0.00025 (MJD-57849)**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 4 7 57850 0.0105 0.3866 0.46191 2017 4 8 57851 0.0114 0.3885 0.46031 2017 4 9 57852 0.0122 0.3903 0.45869 2017 4 10 57853 0.0129 0.3920 0.45709 2017 4 11 57854 0.0136 0.3936 0.45556 2017 4 12 57855 0.0142 0.3951 0.45410 2017 4 13 57856 0.0149 0.3966 0.45271 2017 4 14 57857 0.0156 0.3981 0.45142 2017 4 15 57858 0.0163 0.3996 0.45024 2017 4 16 57859 0.0171 0.4010 0.44917 2017 4 17 57860 0.0179 0.4024 0.44815 2017 4 18 57861 0.0187 0.4038 0.44712 2017 4 19 57862 0.0195 0.4052 0.44608 2017 4 20 57863 0.0203 0.4065 0.44498 2017 4 21 57864 0.0212 0.4078 0.44376 2017 4 22 57865 0.0220 0.4090 0.44237 2017 4 23 57866 0.0230 0.4103 0.44082 2017 4 24 57867 0.0240 0.4115 0.43912 2017 4 25 57868 0.0251 0.4128 0.43730 2017 4 26 57869 0.0262 0.4140 0.43545 2017 4 27 57870 0.0273 0.4153 0.43368 2017 4 28 57871 0.0284 0.4165 0.43205 2017 4 29 57872 0.0295 0.4178 0.43060 2017 4 30 57873 0.0306 0.4190 0.42929 2017 5 1 57874 0.0317 0.4201 0.42808 2017 5 2 57875 0.0329 0.4213 0.42691 2017 5 3 57876 0.0341 0.4224 0.42572 2017 5 4 57877 0.0353 0.4235 0.42449 2017 5 5 57878 0.0365 0.4246 0.42323 2017 5 6 57879 0.0377 0.4257 0.42195 2017 5 7 57880 0.0390 0.4267 0.42067 2017 5 8 57881 0.0402 0.4278 0.41944 2017 5 9 57882 0.0415 0.4288 0.41828 2017 5 10 57883 0.0428 0.4298 0.41721 2017 5 11 57884 0.0441 0.4307 0.41625 2017 5 12 57885 0.0454 0.4317 0.41540 2017 5 13 57886 0.0468 0.4326 0.41464 2017 5 14 57887 0.0482 0.4335 0.41394 2017 5 15 57888 0.0496 0.4344 0.41327 2017 5 16 57889 0.0510 0.4352 0.41261 2017 5 17 57890 0.0524 0.4361 0.41190 2017 5 18 57891 0.0538 0.4369 0.41110 2017 5 19 57892 0.0553 0.4377 0.41018 2017 5 20 57893 0.0568 0.4384 0.40913 2017 5 21 57894 0.0582 0.4392 0.40793 2017 5 22 57895 0.0597 0.4399 0.40661 2017 5 23 57896 0.0612 0.4406 0.40522 2017 5 24 57897 0.0627 0.4413 0.40386 2017 5 25 57898 0.0642 0.4420 0.40259 2017 5 26 57899 0.0658 0.4426 0.40147 2017 5 27 57900 0.0673 0.4432 0.40051 2017 5 28 57901 0.0689 0.4438 0.39967 2017 5 29 57902 0.0704 0.4443 0.39889 2017 5 30 57903 0.0720 0.4449 0.39810 2017 5 31 57904 0.0736 0.4454 0.39727 2017 6 1 57905 0.0752 0.4459 0.39639 2017 6 2 57906 0.0768 0.4463 0.39549 2017 6 3 57907 0.0784 0.4468 0.39457 2017 6 4 57908 0.0800 0.4472 0.39370 2017 6 5 57909 0.0816 0.4476 0.39289 2017 6 6 57910 0.0832 0.4479 0.39217 2017 6 7 57911 0.0848 0.4483 0.39156 2017 6 8 57912 0.0865 0.4486 0.39108 2017 6 9 57913 0.0881 0.4489 0.39070 2017 6 10 57914 0.0897 0.4491 0.39042 2017 6 11 57915 0.0914 0.4493 0.39020 2017 6 12 57916 0.0930 0.4496 0.39001 2017 6 13 57917 0.0947 0.4497 0.38979 2017 6 14 57918 0.0963 0.4499 0.38950 2017 6 15 57919 0.0980 0.4500 0.38911 2017 6 16 57920 0.0996 0.4501 0.38859 2017 6 17 57921 0.1013 0.4502 0.38793 2017 6 18 57922 0.1029 0.4503 0.38715 2017 6 19 57923 0.1046 0.4503 0.38629 2017 6 20 57924 0.1062 0.4503 0.38539 2017 6 21 57925 0.1079 0.4503 0.38453 2017 6 22 57926 0.1095 0.4502 0.38378 2017 6 23 57927 0.1111 0.4502 0.38317 2017 6 24 57928 0.1128 0.4501 0.38267 2017 6 25 57929 0.1144 0.4499 0.38225 2017 6 26 57930 0.1160 0.4498 0.38183 2017 6 27 57931 0.1177 0.4496 0.38137 2017 6 28 57932 0.1193 0.4494 0.38085 2017 6 29 57933 0.1209 0.4492 0.38029 2017 6 30 57934 0.1225 0.4489 0.37970 2017 7 1 57935 0.1241 0.4487 0.37914 2017 7 2 57936 0.1257 0.4484 0.37864 2017 7 3 57937 0.1273 0.4480 0.37822 2017 7 4 57938 0.1289 0.4477 0.37791 2017 7 5 57939 0.1304 0.4473 0.37771 2017 7 6 57940 0.1320 0.4469 0.37762 2017 7 7 57941 0.1336 0.4465 0.37762 2017 7 8 57942 0.1351 0.4460 0.37769 2017 7 9 57943 0.1366 0.4456 0.37778 2017 7 10 57944 0.1382 0.4451 0.37784 2017 7 11 57945 0.1397 0.4446 0.37785 2017 7 12 57946 0.1412 0.4440 0.37775 2017 7 13 57947 0.1427 0.4435 0.37752 2017 7 14 57948 0.1441 0.4429 0.37715 2017 7 15 57949 0.1456 0.4423 0.37666 2017 7 16 57950 0.1470 0.4416 0.37608 2017 7 17 57951 0.1485 0.4410 0.37546 2017 7 18 57952 0.1499 0.4403 0.37487 2017 7 19 57953 0.1513 0.4396 0.37434 2017 7 20 57954 0.1527 0.4389 0.37392 2017 7 21 57955 0.1541 0.4381 0.37360 2017 7 22 57956 0.1554 0.4374 0.37335 2017 7 23 57957 0.1568 0.4366 0.37310 2017 7 24 57958 0.1581 0.4358 0.37285 2017 7 25 57959 0.1594 0.4349 0.37250 2017 7 26 57960 0.1607 0.4341 0.37207 2017 7 27 57961 0.1620 0.4332 0.37158 2017 7 28 57962 0.1633 0.4323 0.37107 2017 7 29 57963 0.1645 0.4314 0.37061 2017 7 30 57964 0.1657 0.4305 0.37022 2017 7 31 57965 0.1669 0.4296 0.36993 2017 8 1 57966 0.1681 0.4286 0.36974 2017 8 2 57967 0.1693 0.4276 0.36966 2017 8 3 57968 0.1704 0.4266 0.36966 2017 8 4 57969 0.1715 0.4256 0.36972 2017 8 5 57970 0.1726 0.4246 0.36979 2017 8 6 57971 0.1737 0.4235 0.36984 2017 8 7 57972 0.1748 0.4224 0.36981 2017 8 8 57973 0.1758 0.4214 0.36968 2017 8 9 57974 0.1768 0.4203 0.36940 2017 8 10 57975 0.1778 0.4191 0.36896 2017 8 11 57976 0.1788 0.4180 0.36838 2017 8 12 57977 0.1797 0.4169 0.36770 2017 8 13 57978 0.1807 0.4157 0.36697 2017 8 14 57979 0.1816 0.4145 0.36624 2017 8 15 57980 0.1824 0.4133 0.36557 2017 8 16 57981 0.1833 0.4121 0.36498 2017 8 17 57982 0.1841 0.4109 0.36449 2017 8 18 57983 0.1849 0.4097 0.36405 2017 8 19 57984 0.1857 0.4085 0.36362 2017 8 20 57985 0.1865 0.4072 0.36314 2017 8 21 57986 0.1872 0.4059 0.36255 2017 8 22 57987 0.1879 0.4047 0.36184 2017 8 23 57988 0.1886 0.4034 0.36102 2017 8 24 57989 0.1892 0.4021 0.36016 2017 8 25 57990 0.1899 0.4008 0.35929 2017 8 26 57991 0.1905 0.3995 0.35847 2017 8 27 57992 0.1911 0.3981 0.35773 2017 8 28 57993 0.1916 0.3968 0.35709 2017 8 29 57994 0.1921 0.3955 0.35655 2017 8 30 57995 0.1926 0.3941 0.35610 2017 8 31 57996 0.1931 0.3927 0.35571 2017 9 1 57997 0.1936 0.3914 0.35534 2017 9 2 57998 0.1940 0.3900 0.35495 2017 9 3 57999 0.1944 0.3886 0.35449 2017 9 4 58000 0.1947 0.3872 0.35392 2017 9 5 58001 0.1951 0.3859 0.35320 2017 9 6 58002 0.1954 0.3845 0.35230 2017 9 7 58003 0.1957 0.3831 0.35124 2017 9 8 58004 0.1959 0.3817 0.35005 2017 9 9 58005 0.1962 0.3802 0.34878 2017 9 10 58006 0.1964 0.3788 0.34750 2017 9 11 58007 0.1965 0.3774 0.34628 2017 9 12 58008 0.1967 0.3760 0.34516 2017 9 13 58009 0.1968 0.3746 0.34413 2017 9 14 58010 0.1969 0.3732 0.34319 2017 9 15 58011 0.1970 0.3717 0.34226 2017 9 16 58012 0.1970 0.3703 0.34130 2017 9 17 58013 0.1970 0.3689 0.34025 2017 9 18 58014 0.1970 0.3675 0.33908 2017 9 19 58015 0.1969 0.3661 0.33778 2017 9 20 58016 0.1969 0.3646 0.33640 2017 9 21 58017 0.1968 0.3632 0.33499 2017 9 22 58018 0.1966 0.3618 0.33361 2017 9 23 58019 0.1965 0.3604 0.33229 2017 9 24 58020 0.1963 0.3590 0.33107 2017 9 25 58021 0.1961 0.3576 0.32996 2017 9 26 58022 0.1959 0.3562 0.32895 2017 9 27 58023 0.1956 0.3548 0.32803 2017 9 28 58024 0.1953 0.3534 0.32715 2017 9 29 58025 0.1950 0.3520 0.32627 2017 9 30 58026 0.1947 0.3506 0.32534 2017 10 1 58027 0.1943 0.3492 0.32432 2017 10 2 58028 0.1939 0.3478 0.32316 2017 10 3 58029 0.1935 0.3465 0.32185 2017 10 4 58030 0.1930 0.3451 0.32036 2017 10 5 58031 0.1926 0.3437 0.31871 2017 10 6 58032 0.1921 0.3424 0.31695 2017 10 7 58033 0.1915 0.3411 0.31516 2017 10 8 58034 0.1910 0.3397 0.31342 2017 10 9 58035 0.1904 0.3384 0.31178 2017 10 10 58036 0.1898 0.3371 0.31028 2017 10 11 58037 0.1892 0.3358 0.30888 2017 10 12 58038 0.1885 0.3345 0.30755 2017 10 13 58039 0.1879 0.3332 0.30621 2017 10 14 58040 0.1872 0.3319 0.30481 2017 10 15 58041 0.1864 0.3307 0.30332 2017 10 16 58042 0.1857 0.3294 0.30172 2017 10 17 58043 0.1849 0.3282 0.30004 2017 10 18 58044 0.1841 0.3270 0.29831 2017 10 19 58045 0.1833 0.3258 0.29660 2017 10 20 58046 0.1825 0.3246 0.29495 2017 10 21 58047 0.1816 0.3234 0.29341 2017 10 22 58048 0.1808 0.3222 0.29199 2017 10 23 58049 0.1799 0.3210 0.29070 2017 10 24 58050 0.1789 0.3199 0.28951 2017 10 25 58051 0.1780 0.3188 0.28840 2017 10 26 58052 0.1770 0.3177 0.28734 2017 10 27 58053 0.1760 0.3166 0.28626 2017 10 28 58054 0.1750 0.3155 0.28512 2017 10 29 58055 0.1740 0.3144 0.28388 2017 10 30 58056 0.1730 0.3134 0.28249 2017 10 31 58057 0.1719 0.3123 0.28093 2017 11 1 58058 0.1708 0.3113 0.27920 2017 11 2 58059 0.1697 0.3103 0.27734 2017 11 3 58060 0.1686 0.3093 0.27541 2017 11 4 58061 0.1674 0.3084 0.27350 2017 11 5 58062 0.1663 0.3074 0.27170 2017 11 6 58063 0.1651 0.3065 0.27005 2017 11 7 58064 0.1639 0.3056 0.26858 2017 11 8 58065 0.1627 0.3047 0.26725 2017 11 9 58066 0.1615 0.3038 0.26598 2017 11 10 58067 0.1603 0.3030 0.26469 2017 11 11 58068 0.1590 0.3021 0.26332 2017 11 12 58069 0.1577 0.3013 0.26186 2017 11 13 58070 0.1564 0.3005 0.26033 2017 11 14 58071 0.1552 0.2998 0.25870 2017 11 15 58072 0.1538 0.2990 0.25702 2017 11 16 58073 0.1525 0.2983 0.25537 2017 11 17 58074 0.1512 0.2976 0.25381 2017 11 18 58075 0.1498 0.2969 0.25232 2017 11 19 58076 0.1485 0.2962 0.25094 2017 11 20 58077 0.1471 0.2956 0.24967 2017 11 21 58078 0.1457 0.2949 0.24851 2017 11 22 58079 0.1443 0.2943 0.24742 2017 11 23 58080 0.1429 0.2938 0.24640 2017 11 24 58081 0.1415 0.2932 0.24541 2017 11 25 58082 0.1401 0.2927 0.24435 2017 11 26 58083 0.1387 0.2921 0.24317 2017 11 27 58084 0.1372 0.2917 0.24183 2017 11 28 58085 0.1358 0.2912 0.24036 2017 11 29 58086 0.1343 0.2907 0.23871 2017 11 30 58087 0.1328 0.2903 0.23689 2017 12 1 58088 0.1314 0.2899 0.23500 2017 12 2 58089 0.1299 0.2895 0.23315 2017 12 3 58090 0.1284 0.2892 0.23144 2017 12 4 58091 0.1269 0.2889 0.22989 2017 12 5 58092 0.1254 0.2886 0.22848 2017 12 6 58093 0.1240 0.2883 0.22716 2017 12 7 58094 0.1225 0.2880 0.22582 2017 12 8 58095 0.1209 0.2878 0.22440 2017 12 9 58096 0.1194 0.2876 0.22291 2017 12 10 58097 0.1179 0.2874 0.22137 2017 12 11 58098 0.1164 0.2872 0.21979 2017 12 12 58099 0.1149 0.2871 0.21823 2017 12 13 58100 0.1134 0.2870 0.21674 2017 12 14 58101 0.1119 0.2869 0.21532 2017 12 15 58102 0.1104 0.2868 0.21395 2017 12 16 58103 0.1089 0.2868 0.21262 2017 12 17 58104 0.1074 0.2867 0.21138 2017 12 18 58105 0.1058 0.2867 0.21022 2017 12 19 58106 0.1043 0.2868 0.20916 2017 12 20 58107 0.1028 0.2868 0.20815 2017 12 21 58108 0.1013 0.2869 0.20714 2017 12 22 58109 0.0998 0.2870 0.20608 2017 12 23 58110 0.0983 0.2871 0.20492 2017 12 24 58111 0.0968 0.2873 0.20364 2017 12 25 58112 0.0953 0.2874 0.20224 2017 12 26 58113 0.0939 0.2876 0.20076 2017 12 27 58114 0.0924 0.2878 0.19920 2017 12 28 58115 0.0909 0.2881 0.19757 2017 12 29 58116 0.0894 0.2884 0.19596 2017 12 30 58117 0.0880 0.2886 0.19447 2017 12 31 58118 0.0865 0.2889 0.19314 2018 1 1 58119 0.0851 0.2893 0.19199 2018 1 2 58120 0.0837 0.2896 0.19096 2018 1 3 58121 0.0822 0.2900 0.18998 2018 1 4 58122 0.0808 0.2904 0.18893 2018 1 5 58123 0.0794 0.2908 0.18772 2018 1 6 58124 0.0780 0.2913 0.18636 2018 1 7 58125 0.0766 0.2917 0.18493 2018 1 8 58126 0.0752 0.2922 0.18350 2018 1 9 58127 0.0739 0.2927 0.18213 2018 1 10 58128 0.0725 0.2933 0.18085 2018 1 11 58129 0.0712 0.2938 0.17970 2018 1 12 58130 0.0698 0.2944 0.17868 2018 1 13 58131 0.0685 0.2950 0.17773 2018 1 14 58132 0.0672 0.2956 0.17681 2018 1 15 58133 0.0659 0.2962 0.17595 2018 1 16 58134 0.0646 0.2969 0.17512 2018 1 17 58135 0.0634 0.2976 0.17423 2018 1 18 58136 0.0621 0.2983 0.17320 2018 1 19 58137 0.0609 0.2990 0.17209 2018 1 20 58138 0.0597 0.2997 0.17089 2018 1 21 58139 0.0585 0.3005 0.16954 2018 1 22 58140 0.0573 0.3012 0.16802 2018 1 23 58141 0.0561 0.3020 0.16634 2018 1 24 58142 0.0550 0.3028 0.16454 2018 1 25 58143 0.0538 0.3037 0.16267 2018 1 26 58144 0.0527 0.3045 0.16087 2018 1 27 58145 0.0516 0.3054 0.15922 2018 1 28 58146 0.0505 0.3063 0.15765 2018 1 29 58147 0.0495 0.3072 0.15618 2018 1 30 58148 0.0484 0.3081 0.15478 2018 1 31 58149 0.0474 0.3090 0.15336 2018 2 1 58150 0.0464 0.3100 0.15186 2018 2 2 58151 0.0454 0.3109 0.15028 2018 2 3 58152 0.0444 0.3119 0.14862 2018 2 4 58153 0.0435 0.3129 0.14692 2018 2 5 58154 0.0426 0.3139 0.14528 2018 2 6 58155 0.0417 0.3149 0.14373 2018 2 7 58156 0.0408 0.3160 0.14229 2018 2 8 58157 0.0399 0.3170 0.14098 2018 2 9 58158 0.0391 0.3181 0.13975 2018 2 10 58159 0.0382 0.3191 0.13865 2018 2 11 58160 0.0375 0.3202 0.13761 2018 2 12 58161 0.0367 0.3213 0.13656 2018 2 13 58162 0.0359 0.3224 0.13549 2018 2 14 58163 0.0352 0.3236 0.13433 2018 2 15 58164 0.0345 0.3247 0.13305 2018 2 16 58165 0.0338 0.3259 0.13163 2018 2 17 58166 0.0332 0.3270 0.13003 2018 2 18 58167 0.0325 0.3282 0.12822 2018 2 19 58168 0.0319 0.3294 0.12625 2018 2 20 58169 0.0313 0.3305 0.12418 2018 2 21 58170 0.0308 0.3317 0.12208 2018 2 22 58171 0.0302 0.3330 0.12000 2018 2 23 58172 0.0297 0.3342 0.11797 2018 2 24 58173 0.0292 0.3354 0.11598 2018 2 25 58174 0.0288 0.3366 0.11408 2018 2 26 58175 0.0283 0.3379 0.11222 2018 2 27 58176 0.0279 0.3391 0.11029 2018 2 28 58177 0.0275 0.3403 0.10823 2018 3 1 58178 0.0272 0.3416 0.10603 2018 3 2 58179 0.0268 0.3429 0.10366 2018 3 3 58180 0.0265 0.3441 0.10118 2018 3 4 58181 0.0262 0.3454 0.09861 2018 3 5 58182 0.0260 0.3467 0.09602 2018 3 6 58183 0.0257 0.3480 0.09351 2018 3 7 58184 0.0255 0.3492 0.09119 2018 3 8 58185 0.0253 0.3505 0.08910 2018 3 9 58186 0.0252 0.3518 0.08718 2018 3 10 58187 0.0250 0.3531 0.08539 2018 3 11 58188 0.0249 0.3544 0.08367 2018 3 12 58189 0.0248 0.3557 0.08194 2018 3 13 58190 0.0248 0.3570 0.08019 2018 3 14 58191 0.0248 0.3583 0.07840 2018 3 15 58192 0.0248 0.3596 0.07656 2018 3 16 58193 0.0248 0.3609 0.07465 2018 3 17 58194 0.0248 0.3622 0.07269 2018 3 18 58195 0.0249 0.3635 0.07068 2018 3 19 58196 0.0250 0.3648 0.06855 2018 3 20 58197 0.0251 0.3661 0.06636 2018 3 21 58198 0.0253 0.3673 0.06419 2018 3 22 58199 0.0254 0.3686 0.06210 2018 3 23 58200 0.0257 0.3699 0.06015 2018 3 24 58201 0.0259 0.3712 0.05831 2018 3 25 58202 0.0261 0.3725 0.05655 2018 3 26 58203 0.0264 0.3737 0.05482 2018 3 27 58204 0.0267 0.3750 0.05308 2018 3 28 58205 0.0270 0.3763 0.05125 2018 3 29 58206 0.0274 0.3775 0.04926 2018 3 30 58207 0.0278 0.3788 0.04714 2018 3 31 58208 0.0282 0.3800 0.04496 2018 4 1 58209 0.0286 0.3813 0.04284 2018 4 2 58210 0.0291 0.3825 0.04086 2018 4 3 58211 0.0295 0.3837 0.03900 2018 4 4 58212 0.0300 0.3849 0.03724 2018 4 5 58213 0.0306 0.3862 0.03558 2018 4 6 58214 0.0311 0.3874 0.03405 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) 57827 -99.03 0.30 -11.86 0.05 57828 -99.24 0.30 -11.79 0.05 57829 -99.55 0.30 -11.75 0.05 57830 -99.73 0.14 -11.77 0.06 57831 -99.67 0.12 -11.82 0.07 57832 -99.39 0.12 -11.83 0.07 57833 -99.00 0.30 -11.77 0.09 IERS Celestial Pole Offset Final Series MJD dpsi deps (msec. of arc) 57786 -99.4 -9.4 57787 -99.5 -9.4 57788 -99.7 -9.4 57789 -100.0 -9.5 57790 -100.4 -9.7 57791 -100.6 -9.9 57792 -100.6 -10.1 57793 -100.5 -10.0 57794 -100.2 -9.9 57795 -99.9 -9.9 57796 -99.6 -10.1 57797 -99.4 -10.3 57798 -99.3 -10.5 57799 -99.5 -10.5 57800 -99.9 -10.4 57801 -100.3 -10.3 57802 -100.6 -10.3 57803 -100.7 -10.4 57804 -100.4 -10.4 57805 -100.1 -10.4 57806 -99.7 -10.4 57807 -99.5 -10.5 57808 -99.3 -10.7 57809 -99.2 -10.9 57810 -99.1 -10.9 57811 -99.0 -10.8 57812 -98.9 -10.6 57813 -98.8 -10.6 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 57827 -0.226 0.119 -0.113 0.050 57828 -0.198 0.119 -0.104 0.050 57829 -0.177 0.119 -0.104 0.050 57830 -0.150 0.056 -0.094 0.060 57831 -0.121 0.048 -0.065 0.070 57832 -0.083 0.048 -0.013 0.070 57833 -0.055 0.119 0.051 0.090 IAU2000A Celestial Pole Offset Final Series MJD dX dY (msec. of arc) 57786 -0.07 -0.24 57787 -0.10 -0.22 57788 -0.12 -0.22 57789 -0.10 -0.26 57790 -0.09 -0.27 57791 -0.06 -0.24 57792 -0.05 -0.30 57793 -0.08 -0.26 57794 -0.09 -0.29 57795 -0.10 -0.30 57796 -0.08 -0.30 57797 -0.07 -0.22 57798 -0.04 -0.24 57799 -0.05 -0.24 57800 -0.07 -0.23 57801 -0.06 -0.17 57802 -0.05 -0.14 57803 -0.06 -0.19 57804 -0.02 -0.20 57805 -0.04 -0.25 57806 -0.01 -0.24 57807 -0.01 -0.20 57808 0.03 -0.18 57809 0.03 -0.21 57810 0.00 -0.23 57811 -0.04 -0.31 57812 -0.07 -0.28 57813 -0.04 -0.27 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).