********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 2 March 2017 Vol. XXX No. 009 ______________________________________________________________________ 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 = +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 by available by 20:00 UTC. * * * * It is anticipated that the IERS RS/PC will transition its EOP * * solution to be consistent with the ITRF 2014 system on * * 16-March-2017. If the transition cannot be done by that date, * * alternative dates to implement the change could be 23-March-2017 * * or 30-March-2017. * * * * 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 24 57808 0.00644 .00009 0.31342 .00009 0.523710 0.000013 17 2 25 57809 0.00630 .00009 0.31576 .00009 0.522612 0.000015 17 2 26 57810 0.00581 .00009 0.31759 .00009 0.521365 0.000020 17 2 27 57811 0.00510 .00009 0.31915 .00009 0.520017 0.000016 17 2 28 57812 0.00454 .00009 0.32080 .00009 0.518525 0.000016 17 3 1 57813 0.00434 .00009 0.32266 .00009 0.516902 0.000016 17 3 2 57814 0.00439 .00009 0.32451 .00009 0.515288 0.000016 IERS Final Values MJD x y UT1-UTC " " s 17 1 2 57755 0.0803 0.2636 0.59021 17 1 3 57756 0.0804 0.2640 0.58897 17 1 4 57757 0.0801 0.2642 0.58756 17 1 5 57758 0.0790 0.2647 0.58603 17 1 6 57759 0.0767 0.2651 0.58442 17 1 7 57760 0.0750 0.2650 0.58282 17 1 8 57761 0.0736 0.2654 0.58129 17 1 9 57762 0.0724 0.2653 0.57987 17 1 10 57763 0.0710 0.2656 0.57856 17 1 11 57764 0.0692 0.2660 0.57733 17 1 12 57765 0.0672 0.2667 0.57612 17 1 13 57766 0.0655 0.2676 0.57494 17 1 14 57767 0.0641 0.2685 0.57374 17 1 15 57768 0.0621 0.2694 0.57243 17 1 16 57769 0.0598 0.2701 0.57107 17 1 17 57770 0.0567 0.2708 0.56973 17 1 18 57771 0.0533 0.2711 0.56847 17 1 19 57772 0.0499 0.2716 0.56726 17 1 20 57773 0.0468 0.2720 0.56615 17 1 21 57774 0.0443 0.2728 0.56508 17 1 22 57775 0.0423 0.2736 0.56404 17 1 23 57776 0.0409 0.2745 0.56309 17 1 24 57777 0.0396 0.2757 0.56224 17 1 25 57778 0.0385 0.2766 0.56145 17 1 26 57779 0.0371 0.2777 0.56066 17 1 27 57780 0.0357 0.2785 0.55987 17 1 28 57781 0.0345 0.2794 0.55898 17 1 29 57782 0.0332 0.2806 0.55798 17 1 30 57783 0.0322 0.2816 0.55682 17 1 31 57784 0.0317 0.2827 0.55556 17 2 1 57785 0.0312 0.2837 0.55419 _______________________________________________________________________ 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 = 0.1070 - 0.0899 cos A + 0.0050 sin A - 0.0160 cos C - 0.0409 sin C y = 0.3684 + 0.0020 cos A + 0.0836 sin A - 0.0409 cos C + 0.0160 sin C UT1-UTC = 0.5194 - 0.00121 (MJD - 57822) - (UT2-UT1) where A = 2*pi*(MJD-57814)/365.25 and C = 2*pi*(MJD-57814)/435. TAI-UTC(MJD 57815) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-57814)**0.80 S t = 0.00025 (MJD-57814)**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 3 3 57815 0.0044 0.3264 0.51363 2017 3 4 57816 0.0044 0.3282 0.51207 2017 3 5 57817 0.0043 0.3299 0.51063 2017 3 6 57818 0.0040 0.3317 0.50929 2017 3 7 57819 0.0036 0.3333 0.50802 2017 3 8 57820 0.0032 0.3348 0.50677 2017 3 9 57821 0.0028 0.3364 0.50550 2017 3 10 57822 0.0025 0.3379 0.50416 2017 3 11 57823 0.0022 0.3396 0.50272 2017 3 12 57824 0.0020 0.3412 0.50119 2017 3 13 57825 0.0018 0.3428 0.49961 2017 3 14 57826 0.0017 0.3445 0.49804 2017 3 15 57827 0.0017 0.3462 0.49653 2017 3 16 57828 0.0016 0.3479 0.49512 2017 3 17 57829 0.0016 0.3495 0.49379 2017 3 18 57830 0.0015 0.3512 0.49255 2017 3 19 57831 0.0014 0.3528 0.49138 2017 3 20 57832 0.0014 0.3545 0.49025 2017 3 21 57833 0.0015 0.3561 0.48911 2017 3 22 57834 0.0016 0.3577 0.48791 2017 3 23 57835 0.0018 0.3593 0.48662 2017 3 24 57836 0.0019 0.3610 0.48520 2017 3 25 57837 0.0021 0.3626 0.48363 2017 3 26 57838 0.0023 0.3643 0.48187 2017 3 27 57839 0.0025 0.3659 0.47995 2017 3 28 57840 0.0028 0.3675 0.47789 2017 3 29 57841 0.0030 0.3691 0.47579 2017 3 30 57842 0.0033 0.3706 0.47373 2017 3 31 57843 0.0037 0.3722 0.47178 2017 4 1 57844 0.0040 0.3738 0.46998 2017 4 2 57845 0.0044 0.3754 0.46832 2017 4 3 57846 0.0048 0.3770 0.46677 2017 4 4 57847 0.0053 0.3785 0.46528 2017 4 5 57848 0.0058 0.3801 0.46379 2017 4 6 57849 0.0063 0.3817 0.46224 2017 4 7 57850 0.0068 0.3832 0.46062 2017 4 8 57851 0.0074 0.3847 0.45891 2017 4 9 57852 0.0080 0.3863 0.45716 2017 4 10 57853 0.0086 0.3878 0.45538 2017 4 11 57854 0.0093 0.3893 0.45363 2017 4 12 57855 0.0099 0.3908 0.45194 2017 4 13 57856 0.0107 0.3923 0.45035 2017 4 14 57857 0.0114 0.3938 0.44885 2017 4 15 57858 0.0122 0.3952 0.44747 2017 4 16 57859 0.0129 0.3967 0.44617 2017 4 17 57860 0.0138 0.3981 0.44494 2017 4 18 57861 0.0146 0.3996 0.44373 2017 4 19 57862 0.0155 0.4010 0.44250 2017 4 20 57863 0.0164 0.4024 0.44120 2017 4 21 57864 0.0173 0.4038 0.43978 2017 4 22 57865 0.0182 0.4051 0.43822 2017 4 23 57866 0.0192 0.4065 0.43648 2017 4 24 57867 0.0202 0.4078 0.43459 2017 4 25 57868 0.0212 0.4092 0.43260 2017 4 26 57869 0.0222 0.4105 0.43058 2017 4 27 57870 0.0233 0.4118 0.42863 2017 4 28 57871 0.0244 0.4131 0.42681 2017 4 29 57872 0.0255 0.4143 0.42516 2017 4 30 57873 0.0266 0.4156 0.42365 2017 5 1 57874 0.0278 0.4168 0.42223 2017 5 2 57875 0.0290 0.4180 0.42085 2017 5 3 57876 0.0302 0.4192 0.41945 2017 5 4 57877 0.0314 0.4204 0.41800 2017 5 5 57878 0.0326 0.4216 0.41652 2017 5 6 57879 0.0339 0.4227 0.41500 2017 5 7 57880 0.0352 0.4238 0.41349 2017 5 8 57881 0.0365 0.4250 0.41201 2017 5 9 57882 0.0378 0.4260 0.41060 2017 5 10 57883 0.0392 0.4271 0.40927 2017 5 11 57884 0.0405 0.4281 0.40806 2017 5 12 57885 0.0419 0.4292 0.40695 2017 5 13 57886 0.0433 0.4302 0.40596 2017 5 14 57887 0.0447 0.4311 0.40505 2017 5 15 57888 0.0462 0.4321 0.40420 2017 5 16 57889 0.0476 0.4330 0.40336 2017 5 17 57890 0.0491 0.4340 0.40248 2017 5 18 57891 0.0506 0.4349 0.40152 2017 5 19 57892 0.0521 0.4357 0.40045 2017 5 20 57893 0.0536 0.4366 0.39923 2017 5 21 57894 0.0551 0.4374 0.39786 2017 5 22 57895 0.0566 0.4382 0.39638 2017 5 23 57896 0.0582 0.4390 0.39483 2017 5 24 57897 0.0598 0.4397 0.39330 2017 5 25 57898 0.0613 0.4405 0.39187 2017 5 26 57899 0.0629 0.4412 0.39060 2017 5 27 57900 0.0645 0.4418 0.38950 2017 5 28 57901 0.0661 0.4425 0.38852 2017 5 29 57902 0.0678 0.4431 0.38761 2017 5 30 57903 0.0694 0.4437 0.38669 2017 5 31 57904 0.0710 0.4443 0.38575 2017 6 1 57905 0.0727 0.4449 0.38476 2017 6 2 57906 0.0744 0.4454 0.38374 2017 6 3 57907 0.0760 0.4459 0.38273 2017 6 4 57908 0.0777 0.4464 0.38176 2017 6 5 57909 0.0794 0.4469 0.38087 2017 6 6 57910 0.0811 0.4473 0.38007 2017 6 7 57911 0.0828 0.4477 0.37939 2017 6 8 57912 0.0845 0.4481 0.37883 2017 6 9 57913 0.0862 0.4484 0.37838 2017 6 10 57914 0.0879 0.4488 0.37803 2017 6 11 57915 0.0896 0.4491 0.37774 2017 6 12 57916 0.0913 0.4494 0.37747 2017 6 13 57917 0.0931 0.4496 0.37718 2017 6 14 57918 0.0948 0.4498 0.37682 2017 6 15 57919 0.0965 0.4500 0.37636 2017 6 16 57920 0.0983 0.4502 0.37578 2017 6 17 57921 0.1000 0.4503 0.37506 2017 6 18 57922 0.1017 0.4505 0.37422 2017 6 19 57923 0.1035 0.4506 0.37332 2017 6 20 57924 0.1052 0.4506 0.37240 2017 6 21 57925 0.1069 0.4507 0.37153 2017 6 22 57926 0.1086 0.4507 0.37076 2017 6 23 57927 0.1104 0.4507 0.37014 2017 6 24 57928 0.1121 0.4506 0.36963 2017 6 25 57929 0.1138 0.4506 0.36920 2017 6 26 57930 0.1155 0.4505 0.36877 2017 6 27 57931 0.1173 0.4504 0.36830 2017 6 28 57932 0.1190 0.4502 0.36776 2017 6 29 57933 0.1207 0.4501 0.36717 2017 6 30 57934 0.1224 0.4499 0.36656 2017 7 1 57935 0.1241 0.4496 0.36598 2017 7 2 57936 0.1258 0.4494 0.36546 2017 7 3 57937 0.1274 0.4491 0.36503 2017 7 4 57938 0.1291 0.4488 0.36470 2017 7 5 57939 0.1308 0.4485 0.36449 2017 7 6 57940 0.1324 0.4481 0.36438 2017 7 7 57941 0.1341 0.4478 0.36436 2017 7 8 57942 0.1357 0.4474 0.36440 2017 7 9 57943 0.1373 0.4470 0.36446 2017 7 10 57944 0.1390 0.4465 0.36450 2017 7 11 57945 0.1406 0.4460 0.36447 2017 7 12 57946 0.1422 0.4455 0.36435 2017 7 13 57947 0.1438 0.4450 0.36409 2017 7 14 57948 0.1453 0.4445 0.36370 2017 7 15 57949 0.1469 0.4439 0.36319 2017 7 16 57950 0.1484 0.4433 0.36259 2017 7 17 57951 0.1500 0.4427 0.36195 2017 7 18 57952 0.1515 0.4420 0.36132 2017 7 19 57953 0.1530 0.4414 0.36077 2017 7 20 57954 0.1545 0.4407 0.36032 2017 7 21 57955 0.1560 0.4400 0.35998 2017 7 22 57956 0.1574 0.4392 0.35970 2017 7 23 57957 0.1589 0.4385 0.35943 2017 7 24 57958 0.1603 0.4377 0.35910 2017 7 25 57959 0.1617 0.4369 0.35868 2017 7 26 57960 0.1631 0.4361 0.35817 2017 7 27 57961 0.1645 0.4353 0.35760 2017 7 28 57962 0.1659 0.4344 0.35702 2017 7 29 57963 0.1672 0.4335 0.35648 2017 7 30 57964 0.1685 0.4326 0.35602 2017 7 31 57965 0.1698 0.4317 0.35565 2017 8 1 57966 0.1711 0.4307 0.35538 2017 8 2 57967 0.1724 0.4298 0.35522 2017 8 3 57968 0.1736 0.4288 0.35514 2017 8 4 57969 0.1748 0.4278 0.35511 2017 8 5 57970 0.1760 0.4268 0.35511 2017 8 6 57971 0.1772 0.4258 0.35507 2017 8 7 57972 0.1784 0.4247 0.35496 2017 8 8 57973 0.1795 0.4236 0.35474 2017 8 9 57974 0.1806 0.4225 0.35437 2017 8 10 57975 0.1817 0.4214 0.35385 2017 8 11 57976 0.1828 0.4203 0.35319 2017 8 12 57977 0.1839 0.4192 0.35242 2017 8 13 57978 0.1849 0.4180 0.35160 2017 8 14 57979 0.1859 0.4168 0.35079 2017 8 15 57980 0.1869 0.4157 0.35003 2017 8 16 57981 0.1878 0.4145 0.34937 2017 8 17 57982 0.1887 0.4132 0.34879 2017 8 18 57983 0.1896 0.4120 0.34827 2017 8 19 57984 0.1905 0.4108 0.34777 2017 8 20 57985 0.1914 0.4095 0.34720 2017 8 21 57986 0.1922 0.4082 0.34654 2017 8 22 57987 0.1930 0.4070 0.34576 2017 8 23 57988 0.1938 0.4057 0.34487 2017 8 24 57989 0.1945 0.4044 0.34394 2017 8 25 57990 0.1953 0.4030 0.34300 2017 8 26 57991 0.1960 0.4017 0.34212 2017 8 27 57992 0.1966 0.4004 0.34133 2017 8 28 57993 0.1973 0.3990 0.34064 2017 8 29 57994 0.1979 0.3977 0.34005 2017 8 30 57995 0.1985 0.3963 0.33956 2017 8 31 57996 0.1990 0.3949 0.33913 2017 9 1 57997 0.1996 0.3936 0.33874 2017 9 2 57998 0.2001 0.3922 0.33833 2017 9 3 57999 0.2006 0.3908 0.33787 2017 9 4 58000 0.2010 0.3894 0.33731 2017 9 5 58001 0.2015 0.3879 0.33662 2017 9 6 58002 0.2019 0.3865 0.33578 2017 9 7 58003 0.2022 0.3851 0.33479 2017 9 8 58004 0.2026 0.3837 0.33368 2017 9 9 58005 0.2029 0.3822 0.33252 2017 9 10 58006 0.2032 0.3808 0.33135 2017 9 11 58007 0.2034 0.3793 0.33025 2017 9 12 58008 0.2037 0.3779 0.32924 2017 9 13 58009 0.2039 0.3764 0.32833 2017 9 14 58010 0.2040 0.3750 0.32749 2017 9 15 58011 0.2042 0.3735 0.32667 2017 9 16 58012 0.2043 0.3721 0.32579 2017 9 17 58013 0.2044 0.3706 0.32482 2017 9 18 58014 0.2044 0.3692 0.32371 2017 9 19 58015 0.2045 0.3677 0.32245 2017 9 20 58016 0.2045 0.3662 0.32109 2017 9 21 58017 0.2044 0.3648 0.31969 2017 9 22 58018 0.2044 0.3633 0.31829 2017 9 23 58019 0.2043 0.3618 0.31695 2017 9 24 58020 0.2042 0.3604 0.31570 2017 9 25 58021 0.2040 0.3589 0.31455 2017 9 26 58022 0.2039 0.3575 0.31349 2017 9 27 58023 0.2037 0.3560 0.31250 2017 9 28 58024 0.2035 0.3546 0.31156 2017 9 29 58025 0.2032 0.3531 0.31062 2017 9 30 58026 0.2029 0.3517 0.30964 2017 10 1 58027 0.2026 0.3503 0.30857 2017 10 2 58028 0.2023 0.3488 0.30736 2017 10 3 58029 0.2019 0.3474 0.30598 2017 10 4 58030 0.2015 0.3460 0.30442 2017 10 5 58031 0.2011 0.3446 0.30269 2017 10 6 58032 0.2007 0.3432 0.30081 2017 10 7 58033 0.2002 0.3418 0.29884 2017 10 8 58034 0.1997 0.3404 0.29688 2017 10 9 58035 0.1992 0.3390 0.29501 2017 10 10 58036 0.1987 0.3376 0.29327 2017 10 11 58037 0.1981 0.3362 0.29167 2017 10 12 58038 0.1975 0.3349 0.29016 2017 10 13 58039 0.1969 0.3335 0.28865 2017 10 14 58040 0.1962 0.3322 0.28708 2017 10 15 58041 0.1955 0.3309 0.28543 2017 10 16 58042 0.1948 0.3296 0.28365 2017 10 17 58043 0.1941 0.3282 0.28184 2017 10 18 58044 0.1934 0.3270 0.28003 2017 10 19 58045 0.1926 0.3257 0.27820 2017 10 20 58046 0.1918 0.3244 0.27649 2017 10 21 58047 0.1910 0.3231 0.27489 2017 10 22 58048 0.1901 0.3219 0.27349 2017 10 23 58049 0.1892 0.3207 0.27226 2017 10 24 58050 0.1884 0.3194 0.27118 2017 10 25 58051 0.1874 0.3182 0.27022 2017 10 26 58052 0.1865 0.3170 0.26928 2017 10 27 58053 0.1856 0.3159 0.26824 2017 10 28 58054 0.1846 0.3147 0.26711 2017 10 29 58055 0.1836 0.3136 0.26587 2017 10 30 58056 0.1826 0.3124 0.26447 2017 10 31 58057 0.1815 0.3113 0.26294 2017 11 1 58058 0.1805 0.3102 0.26122 2017 11 2 58059 0.1794 0.3091 0.25941 2017 11 3 58060 0.1783 0.3081 0.25751 2017 11 4 58061 0.1772 0.3070 0.25560 2017 11 5 58062 0.1760 0.3060 0.25368 2017 11 6 58063 0.1749 0.3050 0.25186 2017 11 7 58064 0.1737 0.3040 0.25020 2017 11 8 58065 0.1725 0.3030 0.24862 2017 11 9 58066 0.1713 0.3021 0.24700 2017 11 10 58067 0.1701 0.3011 0.24537 2017 11 11 58068 0.1688 0.3002 0.24371 2017 11 12 58069 0.1675 0.2993 0.24193 2017 11 13 58070 0.1663 0.2984 0.24002 2017 11 14 58071 0.1650 0.2976 0.23804 2017 11 15 58072 0.1637 0.2967 0.23604 2017 11 16 58073 0.1624 0.2959 0.23400 2017 11 17 58074 0.1610 0.2951 0.23214 2017 11 18 58075 0.1597 0.2943 0.23041 2017 11 19 58076 0.1583 0.2936 0.22885 2017 11 20 58077 0.1569 0.2929 0.22742 2017 11 21 58078 0.1555 0.2921 0.22614 2017 11 22 58079 0.1542 0.2914 0.22496 2017 11 23 58080 0.1527 0.2908 0.22382 2017 11 24 58081 0.1513 0.2901 0.22270 2017 11 25 58082 0.1499 0.2895 0.22155 2017 11 26 58083 0.1484 0.2889 0.22027 2017 11 27 58084 0.1470 0.2883 0.21891 2017 11 28 58085 0.1455 0.2878 0.21745 2017 11 29 58086 0.1441 0.2872 0.21580 2017 11 30 58087 0.1426 0.2867 0.21406 2017 12 1 58088 0.1411 0.2862 0.21224 2017 12 2 58089 0.1396 0.2857 0.21051 2017 12 3 58090 0.1381 0.2853 0.20881 2017 12 4 58091 0.1366 0.2849 0.20717 2017 12 5 58092 0.1351 0.2845 0.20568 2017 12 6 58093 0.1336 0.2841 0.20425 2017 12 7 58094 0.1321 0.2838 0.20278 2017 12 8 58095 0.1305 0.2834 0.20124 2017 12 9 58096 0.1290 0.2831 0.19960 2017 12 10 58097 0.1275 0.2829 0.19780 2017 12 11 58098 0.1259 0.2826 0.19597 2017 12 12 58099 0.1244 0.2824 0.19408 2017 12 13 58100 0.1228 0.2822 0.19222 2017 12 14 58101 0.1213 0.2820 0.19044 2017 12 15 58102 0.1197 0.2818 0.18876 2017 12 16 58103 0.1182 0.2817 0.18716 2017 12 17 58104 0.1166 0.2816 0.18569 2017 12 18 58105 0.1151 0.2815 0.18435 2017 12 19 58106 0.1136 0.2814 0.18305 2017 12 20 58107 0.1120 0.2814 0.18172 2017 12 21 58108 0.1105 0.2814 0.18039 2017 12 22 58109 0.1089 0.2814 0.17898 2017 12 23 58110 0.1074 0.2814 0.17748 2017 12 24 58111 0.1058 0.2815 0.17578 2017 12 25 58112 0.1043 0.2816 0.17387 2017 12 26 58113 0.1028 0.2817 0.17183 2017 12 27 58114 0.1013 0.2818 0.16972 2017 12 28 58115 0.0997 0.2819 0.16765 2017 12 29 58116 0.0982 0.2821 0.16561 2017 12 30 58117 0.0967 0.2823 0.16367 2017 12 31 58118 0.0952 0.2825 0.16183 2018 1 1 58119 0.0937 0.2828 0.16005 2018 1 2 58120 0.0922 0.2831 0.15838 2018 1 3 58121 0.0908 0.2834 0.15678 2018 1 4 58122 0.0893 0.2837 0.15518 2018 1 5 58123 0.0878 0.2840 0.15356 2018 1 6 58124 0.0864 0.2844 0.15193 2018 1 7 58125 0.0849 0.2848 0.15028 2018 1 8 58126 0.0835 0.2852 0.14866 2018 1 9 58127 0.0821 0.2856 0.14701 2018 1 10 58128 0.0806 0.2860 0.14550 2018 1 11 58129 0.0792 0.2865 0.14405 2018 1 12 58130 0.0778 0.2870 0.14275 2018 1 13 58131 0.0765 0.2875 0.14158 2018 1 14 58132 0.0751 0.2881 0.14051 2018 1 15 58133 0.0737 0.2886 0.13956 2018 1 16 58134 0.0724 0.2892 0.13868 2018 1 17 58135 0.0711 0.2898 0.13787 2018 1 18 58136 0.0698 0.2904 0.13693 2018 1 19 58137 0.0685 0.2911 0.13593 2018 1 20 58138 0.0672 0.2917 0.13479 2018 1 21 58139 0.0659 0.2924 0.13356 2018 1 22 58140 0.0647 0.2931 0.13227 2018 1 23 58141 0.0634 0.2938 0.13086 2018 1 24 58142 0.0622 0.2946 0.12936 2018 1 25 58143 0.0610 0.2953 0.12775 2018 1 26 58144 0.0598 0.2961 0.12619 2018 1 27 58145 0.0586 0.2969 0.12476 2018 1 28 58146 0.0575 0.2977 0.12341 2018 1 29 58147 0.0564 0.2986 0.12212 2018 1 30 58148 0.0552 0.2994 0.12081 2018 1 31 58149 0.0541 0.3003 0.11958 2018 2 1 58150 0.0531 0.3012 0.11820 2018 2 2 58151 0.0520 0.3021 0.11667 2018 2 3 58152 0.0510 0.3030 0.11505 2018 2 4 58153 0.0499 0.3039 0.11332 2018 2 5 58154 0.0489 0.3049 0.11158 2018 2 6 58155 0.0480 0.3058 0.10989 2018 2 7 58156 0.0470 0.3068 0.10834 2018 2 8 58157 0.0461 0.3078 0.10690 2018 2 9 58158 0.0452 0.3088 0.10558 2018 2 10 58159 0.0443 0.3098 0.10449 2018 2 11 58160 0.0434 0.3109 0.10339 2018 2 12 58161 0.0426 0.3119 0.10245 2018 2 13 58162 0.0417 0.3130 0.10144 2018 2 14 58163 0.0409 0.3141 0.10033 2018 2 15 58164 0.0401 0.3152 0.09903 2018 2 16 58165 0.0394 0.3163 0.09758 2018 2 17 58166 0.0386 0.3174 0.09594 2018 2 18 58167 0.0379 0.3185 0.09414 2018 2 19 58168 0.0373 0.3196 0.09218 2018 2 20 58169 0.0366 0.3208 0.09018 2018 2 21 58170 0.0360 0.3220 0.08808 2018 2 22 58171 0.0353 0.3231 0.08601 2018 2 23 58172 0.0347 0.3243 0.08405 2018 2 24 58173 0.0342 0.3255 0.08229 2018 2 25 58174 0.0336 0.3267 0.08058 2018 2 26 58175 0.0331 0.3279 0.07880 2018 2 27 58176 0.0326 0.3291 0.07706 2018 2 28 58177 0.0322 0.3303 0.07509 2018 3 1 58178 0.0317 0.3315 0.07309 2018 3 2 58179 0.0313 0.3328 0.07097 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) 57788 -99.79 0.30 -9.39 0.03 57789 -100.11 0.30 -9.46 0.03 57790 -100.48 0.30 -9.63 0.03 57791 -100.74 0.30 -9.84 0.03 57792 -100.80 0.30 -9.97 0.03 57793 -100.64 0.30 -9.93 0.03 57794 -100.35 0.30 -9.80 0.03 IERS Celestial Pole Offset Final Series MJD dpsi deps (msec. of arc) 57755 -99.1 -9.2 57756 -99.2 -9.2 57757 -99.2 -9.1 57758 -99.1 -8.9 57759 -99.1 -8.8 57760 -99.2 -8.6 57761 -99.6 -8.7 57762 -100.1 -8.9 57763 -100.5 -9.2 57764 -100.8 -9.2 57765 -100.7 -9.1 57766 -100.3 -8.9 57767 -99.7 -8.8 57768 -99.2 -9.0 57769 -99.0 -9.1 57770 -98.9 -9.2 57771 -99.0 -9.1 57772 -99.2 -9.0 57773 -99.6 -9.0 57774 -99.9 -9.0 57775 -100.1 -9.1 57776 -100.3 -9.0 57777 -100.0 -9.0 57778 -99.8 -9.0 57779 -99.7 -9.2 57780 -99.6 -9.4 57781 -99.3 -9.5 57782 -99.1 -9.5 57783 -99.0 -9.5 57784 -99.0 -9.4 57785 -99.2 -9.4 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 57788 -0.153 0.119 -0.209 0.030 57789 -0.140 0.119 -0.217 0.030 57790 -0.122 0.119 -0.203 0.030 57791 -0.114 0.119 -0.176 0.030 57792 -0.125 0.119 -0.175 0.030 57793 -0.140 0.119 -0.188 0.030 57794 -0.148 0.119 -0.188 0.030 IAU2000A Celestial Pole Offset Final Series MJD dX dY (msec. of arc) 57755 0.01 -0.11 57756 0.01 -0.20 57757 0.02 -0.22 57758 0.03 -0.15 57759 0.02 -0.19 57760 0.03 -0.10 57761 0.01 -0.17 57762 0.01 -0.16 57763 0.03 -0.18 57764 0.01 -0.07 57765 0.03 -0.12 57766 0.05 -0.15 57767 0.08 -0.11 57768 0.09 -0.13 57769 0.08 -0.03 57770 0.13 -0.09 57771 0.16 -0.10 57772 0.18 -0.11 57773 0.12 -0.13 57774 0.12 -0.09 57775 0.10 -0.17 57776 -0.01 -0.11 57777 0.03 -0.14 57778 0.04 -0.09 57779 0.03 -0.13 57780 0.00 -0.14 57781 0.02 -0.13 57782 0.00 -0.16 57783 0.01 -0.28 57784 0.04 -0.27 57785 0.00 -0.28 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).