********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 23 February 2017 Vol. XXX No. 008 ______________________________________________________________________ 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. * * * * Due to unforeseen circumstances, the future date on which the * * IERS RS/PC will transition to the new 14C04 EOP system has not yet * * been determined. We regret any inconvenience. * * * * 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 2 17 57801 0.00917 .00009 0.30064 .00009 0.531187 0.000016 17 2 18 57802 0.00815 .00009 0.30150 .00009 0.529744 0.000016 17 2 19 57803 0.00766 .00009 0.30289 .00010 0.528542 0.000021 17 2 20 57804 0.00731 .00009 0.30473 .00010 0.527486 0.000024 17 2 21 57805 0.00685 .00009 0.30679 .00010 0.526522 0.000025 17 2 22 57806 0.00644 .00009 0.30892 .00009 0.525648 0.000024 17 2 23 57807 0.00627 .00009 0.31098 .00009 0.524689 0.000022 _______________________________________________________________________ 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 = 0.1048 - 0.0905 cos A - 0.0065 sin A - 0.0112 cos C - 0.0414 sin C y = 0.3656 - 0.0084 cos A + 0.0842 sin A - 0.0414 cos C + 0.0112 sin C UT1-UTC = 0.5263 - 0.00122 (MJD - 57815) - (UT2-UT1) where A = 2*pi*(MJD-57807)/365.25 and C = 2*pi*(MJD-57807)/435. TAI-UTC(MJD 57808) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-57807)**0.80 S t = 0.00025 (MJD-57807)**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 24 57808 0.0060 0.3130 0.52368 2017 2 25 57809 0.0056 0.3149 0.52261 2017 2 26 57810 0.0052 0.3167 0.52144 2017 2 27 57811 0.0046 0.3184 0.52016 2017 2 28 57812 0.0039 0.3201 0.51874 2017 3 1 57813 0.0032 0.3218 0.51722 2017 3 2 57814 0.0026 0.3234 0.51568 2017 3 3 57815 0.0020 0.3250 0.51418 2017 3 4 57816 0.0014 0.3266 0.51280 2017 3 5 57817 0.0009 0.3283 0.51154 2017 3 6 57818 0.0005 0.3299 0.51039 2017 3 7 57819 -0.0001 0.3315 0.50926 2017 3 8 57820 -0.0005 0.3331 0.50809 2017 3 9 57821 -0.0009 0.3346 0.50684 2017 3 10 57822 -0.0013 0.3362 0.50545 2017 3 11 57823 -0.0016 0.3378 0.50389 2017 3 12 57824 -0.0018 0.3395 0.50221 2017 3 13 57825 -0.0020 0.3412 0.50045 2017 3 14 57826 -0.0021 0.3429 0.49867 2017 3 15 57827 -0.0022 0.3446 0.49693 2017 3 16 57828 -0.0023 0.3463 0.49526 2017 3 17 57829 -0.0023 0.3480 0.49369 2017 3 18 57830 -0.0024 0.3497 0.49223 2017 3 19 57831 -0.0024 0.3515 0.49089 2017 3 20 57832 -0.0024 0.3532 0.48961 2017 3 21 57833 -0.0024 0.3548 0.48838 2017 3 22 57834 -0.0024 0.3565 0.48713 2017 3 23 57835 -0.0023 0.3582 0.48582 2017 3 24 57836 -0.0022 0.3599 0.48441 2017 3 25 57837 -0.0020 0.3616 0.48285 2017 3 26 57838 -0.0019 0.3633 0.48111 2017 3 27 57839 -0.0017 0.3649 0.47918 2017 3 28 57840 -0.0014 0.3666 0.47712 2017 3 29 57841 -0.0012 0.3682 0.47498 2017 3 30 57842 -0.0009 0.3699 0.47287 2017 3 31 57843 -0.0005 0.3715 0.47085 2017 4 1 57844 -0.0002 0.3732 0.46898 2017 4 2 57845 0.0002 0.3748 0.46725 2017 4 3 57846 0.0007 0.3765 0.46564 2017 4 4 57847 0.0011 0.3781 0.46408 2017 4 5 57848 0.0016 0.3797 0.46252 2017 4 6 57849 0.0022 0.3814 0.46091 2017 4 7 57850 0.0027 0.3830 0.45923 2017 4 8 57851 0.0033 0.3846 0.45749 2017 4 9 57852 0.0039 0.3862 0.45569 2017 4 10 57853 0.0045 0.3878 0.45389 2017 4 11 57854 0.0052 0.3893 0.45212 2017 4 12 57855 0.0059 0.3909 0.45041 2017 4 13 57856 0.0066 0.3925 0.44880 2017 4 14 57857 0.0073 0.3940 0.44729 2017 4 15 57858 0.0081 0.3955 0.44588 2017 4 16 57859 0.0089 0.3970 0.44456 2017 4 17 57860 0.0098 0.3986 0.44330 2017 4 18 57861 0.0106 0.4000 0.44205 2017 4 19 57862 0.0115 0.4015 0.44078 2017 4 20 57863 0.0124 0.4030 0.43942 2017 4 21 57864 0.0134 0.4045 0.43795 2017 4 22 57865 0.0143 0.4059 0.43633 2017 4 23 57866 0.0153 0.4073 0.43454 2017 4 24 57867 0.0164 0.4087 0.43260 2017 4 25 57868 0.0174 0.4101 0.43056 2017 4 26 57869 0.0185 0.4115 0.42851 2017 4 27 57870 0.0196 0.4129 0.42653 2017 4 28 57871 0.0207 0.4142 0.42469 2017 4 29 57872 0.0218 0.4155 0.42302 2017 4 30 57873 0.0230 0.4169 0.42149 2017 5 1 57874 0.0242 0.4182 0.42005 2017 5 2 57875 0.0254 0.4194 0.41865 2017 5 3 57876 0.0266 0.4207 0.41723 2017 5 4 57877 0.0279 0.4219 0.41577 2017 5 5 57878 0.0292 0.4232 0.41427 2017 5 6 57879 0.0305 0.4244 0.41274 2017 5 7 57880 0.0318 0.4255 0.41121 2017 5 8 57881 0.0331 0.4267 0.40971 2017 5 9 57882 0.0345 0.4278 0.40829 2017 5 10 57883 0.0359 0.4290 0.40696 2017 5 11 57884 0.0373 0.4301 0.40574 2017 5 12 57885 0.0387 0.4311 0.40464 2017 5 13 57886 0.0401 0.4322 0.40365 2017 5 14 57887 0.0416 0.4332 0.40275 2017 5 15 57888 0.0431 0.4342 0.40190 2017 5 16 57889 0.0446 0.4352 0.40106 2017 5 17 57890 0.0461 0.4362 0.40019 2017 5 18 57891 0.0476 0.4371 0.39924 2017 5 19 57892 0.0492 0.4381 0.39817 2017 5 20 57893 0.0507 0.4390 0.39696 2017 5 21 57894 0.0523 0.4398 0.39560 2017 5 22 57895 0.0539 0.4407 0.39412 2017 5 23 57896 0.0555 0.4415 0.39258 2017 5 24 57897 0.0571 0.4423 0.39106 2017 5 25 57898 0.0587 0.4431 0.38964 2017 5 26 57899 0.0604 0.4439 0.38838 2017 5 27 57900 0.0620 0.4446 0.38729 2017 5 28 57901 0.0637 0.4453 0.38632 2017 5 29 57902 0.0654 0.4460 0.38542 2017 5 30 57903 0.0670 0.4466 0.38451 2017 5 31 57904 0.0687 0.4472 0.38357 2017 6 1 57905 0.0704 0.4478 0.38258 2017 6 2 57906 0.0722 0.4484 0.38157 2017 6 3 57907 0.0739 0.4490 0.38057 2017 6 4 57908 0.0756 0.4495 0.37960 2017 6 5 57909 0.0774 0.4500 0.37871 2017 6 6 57910 0.0791 0.4505 0.37790 2017 6 7 57911 0.0809 0.4509 0.37721 2017 6 8 57912 0.0826 0.4513 0.37664 2017 6 9 57913 0.0844 0.4517 0.37618 2017 6 10 57914 0.0861 0.4521 0.37581 2017 6 11 57915 0.0879 0.4524 0.37551 2017 6 12 57916 0.0897 0.4527 0.37525 2017 6 13 57917 0.0915 0.4530 0.37497 2017 6 14 57918 0.0933 0.4533 0.37462 2017 6 15 57919 0.0950 0.4535 0.37417 2017 6 16 57920 0.0968 0.4537 0.37359 2017 6 17 57921 0.0986 0.4539 0.37287 2017 6 18 57922 0.1004 0.4540 0.37203 2017 6 19 57923 0.1022 0.4541 0.37110 2017 6 20 57924 0.1040 0.4542 0.37015 2017 6 21 57925 0.1058 0.4543 0.36925 2017 6 22 57926 0.1076 0.4543 0.36845 2017 6 23 57927 0.1094 0.4544 0.36780 2017 6 24 57928 0.1112 0.4543 0.36726 2017 6 25 57929 0.1129 0.4543 0.36680 2017 6 26 57930 0.1147 0.4542 0.36634 2017 6 27 57931 0.1165 0.4541 0.36583 2017 6 28 57932 0.1183 0.4540 0.36527 2017 6 29 57933 0.1200 0.4539 0.36466 2017 6 30 57934 0.1218 0.4537 0.36404 2017 7 1 57935 0.1235 0.4535 0.36344 2017 7 2 57936 0.1253 0.4532 0.36291 2017 7 3 57937 0.1270 0.4530 0.36247 2017 7 4 57938 0.1288 0.4527 0.36213 2017 7 5 57939 0.1305 0.4524 0.36191 2017 7 6 57940 0.1322 0.4520 0.36180 2017 7 7 57941 0.1339 0.4517 0.36178 2017 7 8 57942 0.1356 0.4513 0.36183 2017 7 9 57943 0.1373 0.4509 0.36189 2017 7 10 57944 0.1390 0.4504 0.36193 2017 7 11 57945 0.1407 0.4500 0.36191 2017 7 12 57946 0.1423 0.4495 0.36178 2017 7 13 57947 0.1440 0.4490 0.36152 2017 7 14 57948 0.1456 0.4484 0.36113 2017 7 15 57949 0.1472 0.4479 0.36061 2017 7 16 57950 0.1488 0.4473 0.36001 2017 7 17 57951 0.1504 0.4467 0.35936 2017 7 18 57952 0.1520 0.4460 0.35873 2017 7 19 57953 0.1536 0.4454 0.35816 2017 7 20 57954 0.1551 0.4447 0.35770 2017 7 21 57955 0.1567 0.4440 0.35734 2017 7 22 57956 0.1582 0.4432 0.35705 2017 7 23 57957 0.1597 0.4425 0.35675 2017 7 24 57958 0.1612 0.4417 0.35641 2017 7 25 57959 0.1627 0.4409 0.35596 2017 7 26 57960 0.1641 0.4401 0.35543 2017 7 27 57961 0.1656 0.4392 0.35484 2017 7 28 57962 0.1670 0.4383 0.35424 2017 7 29 57963 0.1684 0.4374 0.35368 2017 7 30 57964 0.1698 0.4365 0.35319 2017 7 31 57965 0.1711 0.4356 0.35280 2017 8 1 57966 0.1725 0.4346 0.35252 2017 8 2 57967 0.1738 0.4337 0.35233 2017 8 3 57968 0.1751 0.4327 0.35223 2017 8 4 57969 0.1764 0.4317 0.35219 2017 8 5 57970 0.1776 0.4306 0.35217 2017 8 6 57971 0.1789 0.4296 0.35212 2017 8 7 57972 0.1801 0.4285 0.35200 2017 8 8 57973 0.1813 0.4274 0.35178 2017 8 9 57974 0.1825 0.4263 0.35140 2017 8 10 57975 0.1836 0.4252 0.35088 2017 8 11 57976 0.1847 0.4241 0.35021 2017 8 12 57977 0.1858 0.4229 0.34945 2017 8 13 57978 0.1869 0.4217 0.34863 2017 8 14 57979 0.1880 0.4205 0.34782 2017 8 15 57980 0.1890 0.4193 0.34706 2017 8 16 57981 0.1900 0.4181 0.34640 2017 8 17 57982 0.1910 0.4169 0.34582 2017 8 18 57983 0.1919 0.4156 0.34531 2017 8 19 57984 0.1929 0.4143 0.34480 2017 8 20 57985 0.1938 0.4131 0.34425 2017 8 21 57986 0.1947 0.4118 0.34359 2017 8 22 57987 0.1955 0.4105 0.34281 2017 8 23 57988 0.1963 0.4091 0.34194 2017 8 24 57989 0.1971 0.4078 0.34103 2017 8 25 57990 0.1979 0.4065 0.34012 2017 8 26 57991 0.1987 0.4051 0.33928 2017 8 27 57992 0.1994 0.4037 0.33854 2017 8 28 57993 0.2001 0.4023 0.33791 2017 8 29 57994 0.2007 0.4010 0.33741 2017 8 30 57995 0.2014 0.3996 0.33702 2017 8 31 57996 0.2020 0.3981 0.33670 2017 9 1 57997 0.2026 0.3967 0.33643 2017 9 2 57998 0.2031 0.3953 0.33614 2017 9 3 57999 0.2036 0.3939 0.33579 2017 9 4 58000 0.2041 0.3924 0.33531 2017 9 5 58001 0.2046 0.3910 0.33468 2017 9 6 58002 0.2050 0.3895 0.33387 2017 9 7 58003 0.2055 0.3881 0.33287 2017 9 8 58004 0.2058 0.3866 0.33173 2017 9 9 58005 0.2062 0.3851 0.33050 2017 9 10 58006 0.2065 0.3836 0.32925 2017 9 11 58007 0.2068 0.3822 0.32804 2017 9 12 58008 0.2071 0.3807 0.32691 2017 9 13 58009 0.2073 0.3792 0.32587 2017 9 14 58010 0.2075 0.3777 0.32490 2017 9 15 58011 0.2077 0.3762 0.32394 2017 9 16 58012 0.2079 0.3747 0.32294 2017 9 17 58013 0.2080 0.3732 0.32184 2017 9 18 58014 0.2081 0.3717 0.32061 2017 9 19 58015 0.2081 0.3702 0.31925 2017 9 20 58016 0.2082 0.3687 0.31780 2017 9 21 58017 0.2082 0.3671 0.31630 2017 9 22 58018 0.2082 0.3656 0.31481 2017 9 23 58019 0.2081 0.3641 0.31335 2017 9 24 58020 0.2080 0.3626 0.31195 2017 9 25 58021 0.2079 0.3611 0.31064 2017 9 26 58022 0.2078 0.3596 0.30940 2017 9 27 58023 0.2076 0.3581 0.30826 2017 9 28 58024 0.2074 0.3566 0.30717 2017 9 29 58025 0.2072 0.3551 0.30609 2017 9 30 58026 0.2069 0.3537 0.30497 2017 10 1 58027 0.2067 0.3522 0.30376 2017 10 2 58028 0.2063 0.3507 0.30242 2017 10 3 58029 0.2060 0.3492 0.30096 2017 10 4 58030 0.2056 0.3477 0.29936 2017 10 5 58031 0.2052 0.3463 0.29759 2017 10 6 58032 0.2048 0.3448 0.29576 2017 10 7 58033 0.2044 0.3434 0.29393 2017 10 8 58034 0.2039 0.3419 0.29222 2017 10 9 58035 0.2034 0.3405 0.29068 2017 10 10 58036 0.2029 0.3391 0.28932 2017 10 11 58037 0.2023 0.3377 0.28812 2017 10 12 58038 0.2017 0.3362 0.28697 2017 10 13 58039 0.2011 0.3348 0.28573 2017 10 14 58040 0.2005 0.3335 0.28441 2017 10 15 58041 0.1998 0.3321 0.28298 2017 10 16 58042 0.1991 0.3307 0.28142 2017 10 17 58043 0.1984 0.3293 0.27982 2017 10 18 58044 0.1977 0.3280 0.27812 2017 10 19 58045 0.1969 0.3267 0.27649 2017 10 20 58046 0.1961 0.3253 0.27489 2017 10 21 58047 0.1953 0.3240 0.27337 2017 10 22 58048 0.1945 0.3227 0.27186 2017 10 23 58049 0.1936 0.3214 0.27044 2017 10 24 58050 0.1928 0.3202 0.26912 2017 10 25 58051 0.1919 0.3189 0.26786 2017 10 26 58052 0.1909 0.3177 0.26656 2017 10 27 58053 0.1900 0.3164 0.26524 2017 10 28 58054 0.1890 0.3152 0.26391 2017 10 29 58055 0.1880 0.3140 0.26243 2017 10 30 58056 0.1870 0.3128 0.26075 2017 10 31 58057 0.1859 0.3117 0.25889 2017 11 1 58058 0.1849 0.3105 0.25683 2017 11 2 58059 0.1838 0.3094 0.25455 2017 11 3 58060 0.1827 0.3083 0.25227 2017 11 4 58061 0.1816 0.3072 0.25003 2017 11 5 58062 0.1804 0.3061 0.24791 2017 11 6 58063 0.1793 0.3050 0.24595 2017 11 7 58064 0.1781 0.3040 0.24420 2017 11 8 58065 0.1769 0.3029 0.24258 2017 11 9 58066 0.1757 0.3019 0.24104 2017 11 10 58067 0.1745 0.3009 0.23951 2017 11 11 58068 0.1732 0.3000 0.23797 2017 11 12 58069 0.1720 0.2990 0.23633 2017 11 13 58070 0.1707 0.2981 0.23467 2017 11 14 58071 0.1694 0.2972 0.23302 2017 11 15 58072 0.1681 0.2963 0.23132 2017 11 16 58073 0.1667 0.2954 0.22969 2017 11 17 58074 0.1654 0.2946 0.22811 2017 11 18 58075 0.1640 0.2937 0.22669 2017 11 19 58076 0.1627 0.2929 0.22532 2017 11 20 58077 0.1613 0.2921 0.22400 2017 11 21 58078 0.1599 0.2914 0.22278 2017 11 22 58079 0.1585 0.2906 0.22162 2017 11 23 58080 0.1570 0.2899 0.22043 2017 11 24 58081 0.1556 0.2892 0.21920 2017 11 25 58082 0.1542 0.2885 0.21787 2017 11 26 58083 0.1527 0.2879 0.21635 2017 11 27 58084 0.1512 0.2872 0.21468 2017 11 28 58085 0.1497 0.2866 0.21279 2017 11 29 58086 0.1483 0.2860 0.21074 2017 11 30 58087 0.1468 0.2855 0.20859 2017 12 1 58088 0.1453 0.2849 0.20638 2017 12 2 58089 0.1437 0.2844 0.20416 2017 12 3 58090 0.1422 0.2839 0.20205 2017 12 4 58091 0.1407 0.2835 0.20013 2017 12 5 58092 0.1392 0.2830 0.19829 2017 12 6 58093 0.1376 0.2826 0.19646 2017 12 7 58094 0.1361 0.2822 0.19464 2017 12 8 58095 0.1345 0.2818 0.19276 2017 12 9 58096 0.1330 0.2815 0.19079 2017 12 10 58097 0.1314 0.2812 0.18869 2017 12 11 58098 0.1299 0.2809 0.18647 2017 12 12 58099 0.1283 0.2806 0.18427 2017 12 13 58100 0.1267 0.2803 0.18216 2017 12 14 58101 0.1251 0.2801 0.18024 2017 12 15 58102 0.1236 0.2799 0.17848 2017 12 16 58103 0.1220 0.2797 0.17687 2017 12 17 58104 0.1204 0.2796 0.17539 2017 12 18 58105 0.1188 0.2794 0.17395 2017 12 19 58106 0.1173 0.2793 0.17262 2017 12 20 58107 0.1157 0.2793 0.17138 2017 12 21 58108 0.1141 0.2792 0.17019 2017 12 22 58109 0.1126 0.2792 0.16901 2017 12 23 58110 0.1110 0.2792 0.16781 2017 12 24 58111 0.1094 0.2792 0.16654 2017 12 25 58112 0.1078 0.2792 0.16517 2017 12 26 58113 0.1063 0.2793 0.16358 2017 12 27 58114 0.1047 0.2794 0.16195 2017 12 28 58115 0.1032 0.2795 0.16018 2017 12 29 58116 0.1016 0.2796 0.15844 2017 12 30 58117 0.1001 0.2798 0.15677 2017 12 31 58118 0.0986 0.2800 0.15520 2018 1 1 58119 0.0970 0.2802 0.15379 2018 1 2 58120 0.0955 0.2804 0.15250 2018 1 3 58121 0.0940 0.2807 0.15130 2018 1 4 58122 0.0925 0.2810 0.14996 2018 1 5 58123 0.0910 0.2813 0.14856 2018 1 6 58124 0.0895 0.2816 0.14704 2018 1 7 58125 0.0880 0.2820 0.14552 2018 1 8 58126 0.0865 0.2823 0.14406 2018 1 9 58127 0.0851 0.2827 0.14263 2018 1 10 58128 0.0836 0.2832 0.14128 2018 1 11 58129 0.0822 0.2836 0.13995 2018 1 12 58130 0.0807 0.2841 0.13877 2018 1 13 58131 0.0793 0.2846 0.13775 2018 1 14 58132 0.0779 0.2851 0.13683 2018 1 15 58133 0.0765 0.2856 0.13598 2018 1 16 58134 0.0751 0.2861 0.13512 2018 1 17 58135 0.0738 0.2867 0.13438 2018 1 18 58136 0.0724 0.2873 0.13356 2018 1 19 58137 0.0711 0.2879 0.13262 2018 1 20 58138 0.0698 0.2886 0.13158 2018 1 21 58139 0.0684 0.2892 0.13035 2018 1 22 58140 0.0672 0.2899 0.12895 2018 1 23 58141 0.0659 0.2906 0.12742 2018 1 24 58142 0.0646 0.2913 0.12585 2018 1 25 58143 0.0634 0.2921 0.12424 2018 1 26 58144 0.0621 0.2928 0.12265 2018 1 27 58145 0.0609 0.2936 0.12126 2018 1 28 58146 0.0597 0.2944 0.11986 2018 1 29 58147 0.0586 0.2952 0.11866 2018 1 30 58148 0.0574 0.2961 0.11741 2018 1 31 58149 0.0563 0.2969 0.11606 2018 2 1 58150 0.0551 0.2978 0.11449 2018 2 2 58151 0.0540 0.2987 0.11275 2018 2 3 58152 0.0529 0.2996 0.11087 2018 2 4 58153 0.0519 0.3005 0.10892 2018 2 5 58154 0.0508 0.3014 0.10695 2018 2 6 58155 0.0498 0.3024 0.10507 2018 2 7 58156 0.0488 0.3033 0.10324 2018 2 8 58157 0.0478 0.3043 0.10154 2018 2 9 58158 0.0469 0.3053 0.09999 2018 2 10 58159 0.0460 0.3063 0.09867 2018 2 11 58160 0.0450 0.3074 0.09740 2018 2 12 58161 0.0441 0.3084 0.09607 2018 2 13 58162 0.0433 0.3095 0.09481 2018 2 14 58163 0.0424 0.3105 0.09337 2018 2 15 58164 0.0416 0.3116 0.09195 2018 2 16 58165 0.0408 0.3127 0.09044 2018 2 17 58166 0.0400 0.3138 0.08877 2018 2 18 58167 0.0393 0.3149 0.08696 2018 2 19 58168 0.0385 0.3161 0.08504 2018 2 20 58169 0.0378 0.3172 0.08301 2018 2 21 58170 0.0372 0.3184 0.08097 2018 2 22 58171 0.0365 0.3195 0.07902 2018 2 23 58172 0.0359 0.3207 0.07717 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) 57785 -99.26 0.10 -9.34 0.04 57786 -99.37 0.10 -9.36 0.04 57787 -99.49 0.10 -9.37 0.04 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 57785 -0.026 0.040 -0.218 0.040 57786 -0.061 0.040 -0.199 0.040 57787 -0.100 0.040 -0.188 0.040 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).