********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 2 February 2017 Vol. XXX No. 005 ______________________________________________________________________ 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 = +0.5 seconds beginning 26 Jan 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 by available by 20:00 UTC. * * * * As of Bulletin A Vol. XXX, No. 006, on 09 Feb 2017, we anticipate * * that the IERS RS/PC will adopt the new 14C04 EOP system. This * * should result in a jump of less than 0.1 mas in polar motion and * * 10 us in UT1-UTC. The only users who need to be concerned with * * this change are those who need EOP accuracy to better than 0.1 mas * * (~0.3 cm at the Earth's surface, ~1.3 cm at GPS orbit). * * * * 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 1 27 57780 0.03575 .00009 0.27848 .00009 0.559831 0.000014 17 1 28 57781 0.03449 .00010 0.27943 .00010 0.558958 0.000014 17 1 29 57782 0.03329 .00010 0.28052 .00010 0.557944 0.000013 17 1 30 57783 0.03232 .00009 0.28159 .00009 0.556780 0.000024 17 1 31 57784 0.03169 .00009 0.28264 .00009 0.555542 0.000025 17 2 1 57785 0.03121 .00009 0.28364 .00009 0.554182 0.000027 17 2 2 57786 0.03079 .00009 0.28463 .00009 0.552857 0.000028 IERS Final Values MJD x y UT1-UTC " " s 16 12 2 57724 0.1280 0.2670 -0.37090 16 12 3 57725 0.1260 0.2669 -0.37212 16 12 4 57726 0.1242 0.2665 -0.37332 16 12 5 57727 0.1225 0.2663 -0.37465 16 12 6 57728 0.1207 0.2660 -0.37605 16 12 7 57729 0.1195 0.2657 -0.37756 16 12 8 57730 0.1186 0.2655 -0.37917 16 12 9 57731 0.1182 0.2656 -0.38093 16 12 10 57732 0.1180 0.2659 -0.38273 16 12 11 57733 0.1181 0.2663 -0.38452 16 12 12 57734 0.1177 0.2668 -0.38619 16 12 13 57735 0.1164 0.2673 -0.38770 16 12 14 57736 0.1147 0.2674 -0.38902 16 12 15 57737 0.1130 0.2674 -0.39025 16 12 16 57738 0.1118 0.2672 -0.39153 16 12 17 57739 0.1108 0.2665 -0.39276 16 12 18 57740 0.1098 0.2661 -0.39403 16 12 19 57741 0.1085 0.2658 -0.39530 16 12 20 57742 0.1066 0.2660 -0.39657 16 12 21 57743 0.1037 0.2659 -0.39784 16 12 22 57744 0.1008 0.2657 -0.39910 16 12 23 57745 0.0980 0.2652 -0.40034 16 12 24 57746 0.0956 0.2646 -0.40149 16 12 25 57747 0.0933 0.2645 -0.40254 16 12 26 57748 0.0912 0.2646 -0.40353 16 12 27 57749 0.0892 0.2646 -0.40446 16 12 28 57750 0.0868 0.2647 -0.40529 16 12 29 57751 0.0846 0.2642 -0.40609 16 12 30 57752 0.0829 0.2635 -0.40691 16 12 31 57753 0.0813 0.2630 -0.40776 17 1 1 57754 0.0804 0.2631 0.59130 _______________________________________________________________________ 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 = 0.1106 - 0.0880 cos A - 0.0420 sin A + 0.0061 cos C - 0.0362 sin C y = 0.3636 - 0.0404 cos A + 0.0832 sin A - 0.0362 cos C - 0.0061 sin C UT1-UTC = 0.5476 - 0.00125 (MJD - 57794) - (UT2-UT1) where A = 2*pi*(MJD-57786)/365.25 and C = 2*pi*(MJD-57786)/435. TAI-UTC(MJD 57787) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-57786)**0.80 S t = 0.00025 (MJD-57786)**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 2 3 57787 0.0302 0.2858 0.55135 2017 2 4 57788 0.0295 0.2870 0.54986 2017 2 5 57789 0.0286 0.2883 0.54846 2017 2 6 57790 0.0275 0.2896 0.54716 2017 2 7 57791 0.0263 0.2909 0.54596 2017 2 8 57792 0.0250 0.2922 0.54481 2017 2 9 57793 0.0238 0.2935 0.54366 2017 2 10 57794 0.0226 0.2948 0.54244 2017 2 11 57795 0.0216 0.2961 0.54114 2017 2 12 57796 0.0206 0.2975 0.53975 2017 2 13 57797 0.0196 0.2988 0.53830 2017 2 14 57798 0.0187 0.3002 0.53683 2017 2 15 57799 0.0178 0.3015 0.53543 2017 2 16 57800 0.0168 0.3029 0.53409 2017 2 17 57801 0.0159 0.3043 0.53282 2017 2 18 57802 0.0150 0.3058 0.53162 2017 2 19 57803 0.0142 0.3072 0.53050 2017 2 20 57804 0.0134 0.3086 0.52943 2017 2 21 57805 0.0127 0.3100 0.52841 2017 2 22 57806 0.0120 0.3114 0.52739 2017 2 23 57807 0.0113 0.3129 0.52632 2017 2 24 57808 0.0106 0.3144 0.52515 2017 2 25 57809 0.0100 0.3159 0.52384 2017 2 26 57810 0.0093 0.3174 0.52235 2017 2 27 57811 0.0087 0.3189 0.52068 2017 2 28 57812 0.0081 0.3205 0.51885 2017 3 1 57813 0.0075 0.3220 0.51691 2017 3 2 57814 0.0070 0.3236 0.51496 2017 3 3 57815 0.0065 0.3251 0.51305 2017 3 4 57816 0.0060 0.3267 0.51125 2017 3 5 57817 0.0055 0.3282 0.50958 2017 3 6 57818 0.0051 0.3298 0.50802 2017 3 7 57819 0.0047 0.3314 0.50654 2017 3 8 57820 0.0044 0.3330 0.50507 2017 3 9 57821 0.0040 0.3346 0.50358 2017 3 10 57822 0.0037 0.3362 0.50200 2017 3 11 57823 0.0035 0.3378 0.50032 2017 3 12 57824 0.0032 0.3394 0.49857 2017 3 13 57825 0.0030 0.3410 0.49677 2017 3 14 57826 0.0028 0.3426 0.49496 2017 3 15 57827 0.0027 0.3442 0.49319 2017 3 16 57828 0.0026 0.3458 0.49148 2017 3 17 57829 0.0025 0.3474 0.48984 2017 3 18 57830 0.0024 0.3491 0.48830 2017 3 19 57831 0.0024 0.3507 0.48683 2017 3 20 57832 0.0024 0.3523 0.48543 2017 3 21 57833 0.0024 0.3539 0.48406 2017 3 22 57834 0.0025 0.3556 0.48267 2017 3 23 57835 0.0026 0.3572 0.48124 2017 3 24 57836 0.0027 0.3588 0.47970 2017 3 25 57837 0.0029 0.3604 0.47802 2017 3 26 57838 0.0031 0.3620 0.47618 2017 3 27 57839 0.0033 0.3637 0.47415 2017 3 28 57840 0.0035 0.3653 0.47199 2017 3 29 57841 0.0038 0.3669 0.46976 2017 3 30 57842 0.0041 0.3685 0.46755 2017 3 31 57843 0.0045 0.3701 0.46545 2017 4 1 57844 0.0048 0.3717 0.46350 2017 4 2 57845 0.0052 0.3733 0.46169 2017 4 3 57846 0.0057 0.3749 0.46000 2017 4 4 57847 0.0061 0.3764 0.45837 2017 4 5 57848 0.0066 0.3780 0.45675 2017 4 6 57849 0.0071 0.3796 0.45508 2017 4 7 57850 0.0077 0.3811 0.45335 2017 4 8 57851 0.0082 0.3827 0.45154 2017 4 9 57852 0.0088 0.3842 0.44969 2017 4 10 57853 0.0095 0.3858 0.44782 2017 4 11 57854 0.0101 0.3873 0.44599 2017 4 12 57855 0.0108 0.3888 0.44423 2017 4 13 57856 0.0115 0.3903 0.44256 2017 4 14 57857 0.0123 0.3918 0.44101 2017 4 15 57858 0.0130 0.3933 0.43956 2017 4 16 57859 0.0138 0.3948 0.43821 2017 4 17 57860 0.0146 0.3962 0.43692 2017 4 18 57861 0.0155 0.3977 0.43566 2017 4 19 57862 0.0164 0.3991 0.43438 2017 4 20 57863 0.0173 0.4005 0.43302 2017 4 21 57864 0.0182 0.4019 0.43156 2017 4 22 57865 0.0191 0.4033 0.42994 2017 4 23 57866 0.0201 0.4047 0.42816 2017 4 24 57867 0.0211 0.4061 0.42623 2017 4 25 57868 0.0221 0.4074 0.42420 2017 4 26 57869 0.0232 0.4088 0.42216 2017 4 27 57870 0.0243 0.4101 0.42019 2017 4 28 57871 0.0254 0.4114 0.41836 2017 4 29 57872 0.0265 0.4127 0.41670 2017 4 30 57873 0.0276 0.4139 0.41519 2017 5 1 57874 0.0288 0.4152 0.41377 2017 5 2 57875 0.0300 0.4164 0.41240 2017 5 3 57876 0.0312 0.4177 0.41101 2017 5 4 57877 0.0324 0.4189 0.40957 2017 5 5 57878 0.0337 0.4200 0.40809 2017 5 6 57879 0.0349 0.4212 0.40657 2017 5 7 57880 0.0362 0.4223 0.40505 2017 5 8 57881 0.0376 0.4235 0.40356 2017 5 9 57882 0.0389 0.4246 0.40214 2017 5 10 57883 0.0402 0.4257 0.40082 2017 5 11 57884 0.0416 0.4267 0.39961 2017 5 12 57885 0.0430 0.4278 0.39851 2017 5 13 57886 0.0444 0.4288 0.39752 2017 5 14 57887 0.0458 0.4298 0.39661 2017 5 15 57888 0.0473 0.4308 0.39575 2017 5 16 57889 0.0487 0.4317 0.39489 2017 5 17 57890 0.0502 0.4327 0.39399 2017 5 18 57891 0.0517 0.4336 0.39301 2017 5 19 57892 0.0532 0.4345 0.39191 2017 5 20 57893 0.0547 0.4353 0.39066 2017 5 21 57894 0.0562 0.4362 0.38927 2017 5 22 57895 0.0578 0.4370 0.38779 2017 5 23 57896 0.0594 0.4378 0.38624 2017 5 24 57897 0.0609 0.4386 0.38471 2017 5 25 57898 0.0625 0.4393 0.38329 2017 5 26 57899 0.0641 0.4401 0.38201 2017 5 27 57900 0.0657 0.4408 0.38090 2017 5 28 57901 0.0673 0.4415 0.37992 2017 5 29 57902 0.0690 0.4421 0.37899 2017 5 30 57903 0.0706 0.4427 0.37807 2017 5 31 57904 0.0723 0.4434 0.37711 2017 6 1 57905 0.0739 0.4439 0.37610 2017 6 2 57906 0.0756 0.4445 0.37508 2017 6 3 57907 0.0773 0.4450 0.37405 2017 6 4 57908 0.0790 0.4455 0.37306 2017 6 5 57909 0.0806 0.4460 0.37214 2017 6 6 57910 0.0823 0.4465 0.37132 2017 6 7 57911 0.0840 0.4469 0.37060 2017 6 8 57912 0.0858 0.4473 0.37001 2017 6 9 57913 0.0875 0.4477 0.36953 2017 6 10 57914 0.0892 0.4480 0.36914 2017 6 11 57915 0.0909 0.4484 0.36881 2017 6 12 57916 0.0926 0.4487 0.36851 2017 6 13 57917 0.0944 0.4489 0.36818 2017 6 14 57918 0.0961 0.4492 0.36778 2017 6 15 57919 0.0978 0.4494 0.36728 2017 6 16 57920 0.0996 0.4496 0.36665 2017 6 17 57921 0.1013 0.4498 0.36589 2017 6 18 57922 0.1031 0.4499 0.36501 2017 6 19 57923 0.1048 0.4500 0.36405 2017 6 20 57924 0.1065 0.4501 0.36306 2017 6 21 57925 0.1083 0.4502 0.36212 2017 6 22 57926 0.1100 0.4502 0.36129 2017 6 23 57927 0.1117 0.4502 0.36060 2017 6 24 57928 0.1135 0.4502 0.36004 2017 6 25 57929 0.1152 0.4502 0.35955 2017 6 26 57930 0.1169 0.4501 0.35906 2017 6 27 57931 0.1187 0.4500 0.35853 2017 6 28 57932 0.1204 0.4499 0.35794 2017 6 29 57933 0.1221 0.4497 0.35730 2017 6 30 57934 0.1238 0.4496 0.35665 2017 7 1 57935 0.1255 0.4494 0.35602 2017 7 2 57936 0.1272 0.4491 0.35546 2017 7 3 57937 0.1289 0.4489 0.35498 2017 7 4 57938 0.1306 0.4486 0.35461 2017 7 5 57939 0.1322 0.4483 0.35436 2017 7 6 57940 0.1339 0.4480 0.35421 2017 7 7 57941 0.1355 0.4476 0.35415 2017 7 8 57942 0.1372 0.4473 0.35415 2017 7 9 57943 0.1388 0.4469 0.35417 2017 7 10 57944 0.1405 0.4464 0.35417 2017 7 11 57945 0.1421 0.4460 0.35410 2017 7 12 57946 0.1437 0.4455 0.35393 2017 7 13 57947 0.1453 0.4450 0.35363 2017 7 14 57948 0.1469 0.4445 0.35318 2017 7 15 57949 0.1484 0.4439 0.35262 2017 7 16 57950 0.1500 0.4434 0.35196 2017 7 17 57951 0.1515 0.4428 0.35126 2017 7 18 57952 0.1530 0.4422 0.35058 2017 7 19 57953 0.1546 0.4415 0.34996 2017 7 20 57954 0.1561 0.4408 0.34944 2017 7 21 57955 0.1575 0.4402 0.34903 2017 7 22 57956 0.1590 0.4394 0.34868 2017 7 23 57957 0.1605 0.4387 0.34834 2017 7 24 57958 0.1619 0.4380 0.34794 2017 7 25 57959 0.1633 0.4372 0.34745 2017 7 26 57960 0.1647 0.4364 0.34687 2017 7 27 57961 0.1661 0.4356 0.34624 2017 7 28 57962 0.1675 0.4347 0.34560 2017 7 29 57963 0.1688 0.4339 0.34501 2017 7 30 57964 0.1702 0.4330 0.34450 2017 7 31 57965 0.1715 0.4321 0.34410 2017 8 1 57966 0.1728 0.4312 0.34382 2017 8 2 57967 0.1740 0.4302 0.34365 2017 8 3 57968 0.1753 0.4293 0.34359 2017 8 4 57969 0.1765 0.4283 0.34361 2017 8 5 57970 0.1777 0.4273 0.34367 2017 8 6 57971 0.1789 0.4263 0.34373 2017 8 7 57972 0.1801 0.4252 0.34375 2017 8 8 57973 0.1812 0.4242 0.34369 2017 8 9 57974 0.1824 0.4231 0.34351 2017 8 10 57975 0.1835 0.4220 0.34319 2017 8 11 57976 0.1845 0.4209 0.34274 2017 8 12 57977 0.1856 0.4198 0.34217 2017 8 13 57978 0.1866 0.4187 0.34152 2017 8 14 57979 0.1876 0.4175 0.34084 2017 8 15 57980 0.1886 0.4164 0.34017 2017 8 16 57981 0.1896 0.4152 0.33955 2017 8 17 57982 0.1905 0.4140 0.33898 2017 8 18 57983 0.1914 0.4128 0.33844 2017 8 19 57984 0.1923 0.4115 0.33788 2017 8 20 57985 0.1932 0.4103 0.33724 2017 8 21 57986 0.1940 0.4091 0.33648 2017 8 22 57987 0.1949 0.4078 0.33558 2017 8 23 57988 0.1956 0.4065 0.33458 2017 8 24 57989 0.1964 0.4052 0.33352 2017 8 25 57990 0.1971 0.4039 0.33247 2017 8 26 57991 0.1978 0.4026 0.33149 2017 8 27 57992 0.1985 0.4013 0.33063 2017 8 28 57993 0.1992 0.4000 0.32991 2017 8 29 57994 0.1998 0.3986 0.32933 2017 8 30 57995 0.2004 0.3973 0.32888 2017 8 31 57996 0.2010 0.3959 0.32853 2017 9 1 57997 0.2015 0.3946 0.32821 2017 9 2 57998 0.2021 0.3932 0.32788 2017 9 3 57999 0.2026 0.3918 0.32747 2017 9 4 58000 0.2030 0.3904 0.32692 2017 9 5 58001 0.2035 0.3890 0.32621 2017 9 6 58002 0.2039 0.3876 0.32534 2017 9 7 58003 0.2043 0.3862 0.32430 2017 9 8 58004 0.2046 0.3848 0.32313 2017 9 9 58005 0.2049 0.3834 0.32185 2017 9 10 58006 0.2052 0.3819 0.32052 2017 9 11 58007 0.2055 0.3805 0.31920 2017 9 12 58008 0.2058 0.3791 0.31796 2017 9 13 58009 0.2060 0.3776 0.31681 2017 9 14 58010 0.2062 0.3762 0.31568 2017 9 15 58011 0.2063 0.3747 0.31456 2017 9 16 58012 0.2064 0.3733 0.31345 2017 9 17 58013 0.2065 0.3718 0.31221 2017 9 18 58014 0.2066 0.3704 0.31078 2017 9 19 58015 0.2067 0.3689 0.30921 2017 9 20 58016 0.2067 0.3675 0.30752 2017 9 21 58017 0.2067 0.3660 0.30570 2017 9 22 58018 0.2066 0.3646 0.30399 2017 9 23 58019 0.2066 0.3631 0.30237 2017 9 24 58020 0.2065 0.3617 0.30088 2017 9 25 58021 0.2064 0.3603 0.29953 2017 9 26 58022 0.2062 0.3588 0.29833 2017 9 27 58023 0.2060 0.3574 0.29724 2017 9 28 58024 0.2058 0.3559 0.29623 2017 9 29 58025 0.2056 0.3545 0.29527 2017 9 30 58026 0.2053 0.3531 0.29430 2017 10 1 58027 0.2050 0.3516 0.29322 2017 10 2 58028 0.2047 0.3502 0.29206 2017 10 3 58029 0.2044 0.3488 0.29079 2017 10 4 58030 0.2040 0.3474 0.28929 2017 10 5 58031 0.2036 0.3460 0.28764 2017 10 6 58032 0.2032 0.3446 0.28584 2017 10 7 58033 0.2027 0.3432 0.28406 2017 10 8 58034 0.2023 0.3418 0.28226 2017 10 9 58035 0.2018 0.3404 0.28048 2017 10 10 58036 0.2012 0.3390 0.27885 2017 10 11 58037 0.2007 0.3377 0.27733 2017 10 12 58038 0.2001 0.3363 0.27583 2017 10 13 58039 0.1995 0.3350 0.27432 2017 10 14 58040 0.1989 0.3336 0.27273 2017 10 15 58041 0.1982 0.3323 0.27096 2017 10 16 58042 0.1975 0.3310 0.26907 2017 10 17 58043 0.1968 0.3297 0.26702 2017 10 18 58044 0.1961 0.3284 0.26490 2017 10 19 58045 0.1954 0.3271 0.26278 2017 10 20 58046 0.1946 0.3259 0.26070 2017 10 21 58047 0.1938 0.3246 0.25868 2017 10 22 58048 0.1930 0.3234 0.25676 2017 10 23 58049 0.1921 0.3221 0.25501 2017 10 24 58050 0.1913 0.3209 0.25332 2017 10 25 58051 0.1904 0.3197 0.25165 2017 10 26 58052 0.1895 0.3185 0.25002 2017 10 27 58053 0.1885 0.3173 0.24836 2017 10 28 58054 0.1876 0.3162 0.24664 2017 10 29 58055 0.1866 0.3150 0.24473 2017 10 30 58056 0.1856 0.3139 0.24261 2017 10 31 58057 0.1846 0.3128 0.24034 2017 11 1 58058 0.1836 0.3117 0.23794 2017 11 2 58059 0.1825 0.3106 0.23551 2017 11 3 58060 0.1814 0.3095 0.23304 2017 11 4 58061 0.1803 0.3085 0.23062 2017 11 5 58062 0.1792 0.3074 0.22828 2017 11 6 58063 0.1781 0.3064 0.22603 2017 11 7 58064 0.1769 0.3054 0.22396 2017 11 8 58065 0.1758 0.3044 0.22206 2017 11 9 58066 0.1746 0.3035 0.22026 2017 11 10 58067 0.1734 0.3025 0.21851 2017 11 11 58068 0.1722 0.3016 0.21676 2017 11 12 58069 0.1709 0.3007 0.21499 2017 11 13 58070 0.1697 0.2998 0.21318 2017 11 14 58071 0.1684 0.2989 0.21124 2017 11 15 58072 0.1672 0.2981 0.20937 2017 11 16 58073 0.1659 0.2973 0.20749 2017 11 17 58074 0.1646 0.2964 0.20573 2017 11 18 58075 0.1632 0.2957 0.20410 2017 11 19 58076 0.1619 0.2949 0.20259 2017 11 20 58077 0.1606 0.2941 0.20124 2017 11 21 58078 0.1592 0.2934 0.20002 2017 11 22 58079 0.1578 0.2927 0.19895 2017 11 23 58080 0.1565 0.2920 0.19782 2017 11 24 58081 0.1551 0.2914 0.19668 2017 11 25 58082 0.1537 0.2907 0.19546 2017 11 26 58083 0.1523 0.2901 0.19417 2017 11 27 58084 0.1508 0.2895 0.19282 2017 11 28 58085 0.1494 0.2889 0.19130 2017 11 29 58086 0.1480 0.2884 0.18963 2017 11 30 58087 0.1465 0.2879 0.18776 2017 12 1 58088 0.1451 0.2873 0.18588 2017 12 2 58089 0.1436 0.2869 0.18409 2017 12 3 58090 0.1421 0.2864 0.18239 2017 12 4 58091 0.1407 0.2860 0.18084 2017 12 5 58092 0.1392 0.2855 0.17936 2017 12 6 58093 0.1377 0.2852 0.17809 2017 12 7 58094 0.1362 0.2848 0.17679 2017 12 8 58095 0.1347 0.2844 0.17541 2017 12 9 58096 0.1332 0.2841 0.17398 2017 12 10 58097 0.1317 0.2838 0.17241 2017 12 11 58098 0.1302 0.2835 0.17078 2017 12 12 58099 0.1287 0.2833 0.16915 2017 12 13 58100 0.1272 0.2831 0.16759 2017 12 14 58101 0.1257 0.2829 0.16611 2017 12 15 58102 0.1241 0.2827 0.16473 2017 12 16 58103 0.1226 0.2825 0.16359 2017 12 17 58104 0.1211 0.2824 0.16249 2017 12 18 58105 0.1196 0.2823 0.16161 2017 12 19 58106 0.1181 0.2822 0.16072 2017 12 20 58107 0.1166 0.2821 0.15983 2017 12 21 58108 0.1151 0.2821 0.15882 2017 12 22 58109 0.1135 0.2821 0.15772 2017 12 23 58110 0.1120 0.2821 0.15649 2017 12 24 58111 0.1105 0.2821 0.15510 2017 12 25 58112 0.1090 0.2822 0.15356 2017 12 26 58113 0.1075 0.2822 0.15190 2017 12 27 58114 0.1060 0.2823 0.15006 2017 12 28 58115 0.1046 0.2825 0.14816 2017 12 29 58116 0.1031 0.2826 0.14628 2017 12 30 58117 0.1016 0.2828 0.14457 2017 12 31 58118 0.1001 0.2830 0.14293 2018 1 1 58119 0.0987 0.2832 0.14132 2018 1 2 58120 0.0972 0.2834 0.13985 2018 1 3 58121 0.0957 0.2837 0.13826 2018 1 4 58122 0.0943 0.2840 0.13673 2018 1 5 58123 0.0929 0.2843 0.13513 2018 1 6 58124 0.0915 0.2846 0.13343 2018 1 7 58125 0.0900 0.2850 0.13167 2018 1 8 58126 0.0886 0.2853 0.12991 2018 1 9 58127 0.0872 0.2857 0.12815 2018 1 10 58128 0.0859 0.2862 0.12650 2018 1 11 58129 0.0845 0.2866 0.12503 2018 1 12 58130 0.0831 0.2871 0.12371 2018 1 13 58131 0.0818 0.2875 0.12243 2018 1 14 58132 0.0804 0.2880 0.12140 2018 1 15 58133 0.0791 0.2886 0.12036 2018 1 16 58134 0.0778 0.2891 0.11925 2018 1 17 58135 0.0765 0.2897 0.11808 2018 1 18 58136 0.0752 0.2903 0.11687 2018 1 19 58137 0.0739 0.2909 0.11560 2018 1 20 58138 0.0727 0.2915 0.11417 2018 1 21 58139 0.0714 0.2921 0.11264 2018 1 22 58140 0.0702 0.2928 0.11107 2018 1 23 58141 0.0690 0.2935 0.10948 2018 1 24 58142 0.0678 0.2942 0.10771 2018 1 25 58143 0.0666 0.2949 0.10593 2018 1 26 58144 0.0655 0.2957 0.10422 2018 1 27 58145 0.0643 0.2964 0.10256 2018 1 28 58146 0.0632 0.2972 0.10105 2018 1 29 58147 0.0621 0.2980 0.09963 2018 1 30 58148 0.0610 0.2988 0.09826 2018 1 31 58149 0.0599 0.2996 0.09681 2018 2 1 58150 0.0589 0.3005 0.09543 2018 2 2 58151 0.0578 0.3013 0.09388 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) 57758 -99.20 0.30 -8.86 0.02 57759 -99.18 0.30 -8.72 0.02 57760 -99.31 0.30 -8.63 0.02 57761 -99.66 0.30 -8.68 0.15 57762 -100.14 0.30 -8.90 0.06 57763 -100.58 0.30 -9.15 0.06 57764 -100.79 0.30 -9.22 0.06 57765 -100.72 0.30 -9.05 0.06 57766 -100.35 0.30 -8.81 0.06 57767 -99.81 0.30 -8.77 0.06 57768 -99.28 0.30 -8.95 0.15 57769 -99.01 0.30 -9.16 0.04 57770 -99.02 0.30 -9.21 0.04 57771 -99.19 0.30 -9.09 0.04 IERS Celestial Pole Offset Final Series MJD dpsi deps (msec. of arc) 57724 -100.0 -10.0 57725 -100.0 -10.1 57726 -100.1 -10.1 57727 -100.1 -10.1 57728 -100.1 -9.9 57729 -100.0 -9.7 57730 -99.9 -9.5 57731 -99.9 -9.3 57732 -99.9 -9.1 57733 -100.0 -9.1 57734 -100.3 -9.3 57735 -100.6 -9.6 57736 -100.9 -9.7 57737 -100.9 -9.6 57738 -100.6 -9.4 57739 -100.1 -9.4 57740 -99.7 -9.6 57741 -99.5 -9.6 57742 -99.5 -9.5 57743 -99.6 -9.2 57744 -99.6 -9.1 57745 -99.6 -9.1 57746 -99.7 -9.0 57747 -99.9 -9.0 57748 -99.9 -8.9 57749 -99.8 -8.9 57750 -99.8 -8.9 57751 -99.7 -9.0 57752 -99.5 -9.1 57753 -99.2 -9.2 57754 -99.1 -9.3 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 57758 -0.006 0.119 -0.110 0.020 57759 -0.016 0.119 -0.109 0.020 57760 -0.018 0.119 -0.128 0.020 57761 -0.018 0.119 -0.153 0.150 57762 -0.010 0.119 -0.157 0.060 57763 0.000 0.119 -0.126 0.060 57764 0.015 0.119 -0.086 0.060 57765 0.020 0.119 -0.069 0.060 57766 0.031 0.119 -0.062 0.060 57767 0.041 0.119 -0.075 0.060 57768 0.063 0.119 -0.085 0.150 57769 0.076 0.119 -0.093 0.040 57770 0.084 0.119 -0.099 0.040 57771 0.087 0.119 -0.087 0.040 IAU2000A Celestial Pole Offset Final Series MJD dX dY (msec. of arc) 57724 0.09 -0.19 57725 0.08 -0.22 57726 0.06 -0.17 57727 0.07 -0.22 57728 0.03 -0.20 57729 0.02 -0.21 57730 0.02 -0.21 57731 0.00 -0.19 57732 0.00 -0.16 57733 0.01 -0.20 57734 -0.01 -0.22 57735 -0.02 -0.27 57736 -0.07 -0.31 57737 -0.07 -0.41 57738 -0.06 -0.40 57739 -0.04 -0.35 57740 -0.05 -0.35 57741 -0.03 -0.25 57742 0.01 -0.26 57743 0.01 -0.16 57744 0.00 -0.19 57745 0.00 -0.22 57746 0.01 -0.14 57747 -0.01 -0.20 57748 0.01 -0.16 57749 0.02 -0.16 57750 -0.01 -0.10 57751 -0.01 -0.10 57752 -0.01 -0.09 57753 0.02 -0.11 57754 0.00 -0.17 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).