********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 4 May 2017 Vol. XXX No. 018 ______________________________________________________________________ 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. * * * * From Tuesday, 2 May 2017 through Friday, 12 May 2017 the Naval * * Observatory will perform scheduled network maintenance. Network * * degradations or outages impacting our product delivery are possible * * but should be temporary in nature. Please see above for details on * * accessing the backup EO server in the event of an outage. * * * * 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 4 28 57871 0.03330 .00009 0.42600 .00009 0.426238 0.000016 17 4 29 57872 0.03468 .00009 0.42764 .00009 0.424579 0.000017 17 4 30 57873 0.03628 .00009 0.42948 .00009 0.423102 0.000019 17 5 1 57874 0.03789 .00009 0.43130 .00009 0.421707 0.000013 17 5 2 57875 0.03935 .00009 0.43288 .00009 0.420335 0.000015 17 5 3 57876 0.04053 .00009 0.43417 .00009 0.418961 0.000015 17 5 4 57877 0.04158 .00009 0.43524 .00009 0.417546 0.000015 IERS Final Values MJD x y UT1-UTC " " s 17 3 2 57814 0.0045 0.3245 0.51525 17 3 3 57815 0.0048 0.3264 0.51375 17 3 4 57816 0.0050 0.3284 0.51230 17 3 5 57817 0.0051 0.3300 0.51088 17 3 6 57818 0.0047 0.3319 0.50956 17 3 7 57819 0.0039 0.3335 0.50827 17 3 8 57820 0.0034 0.3350 0.50702 17 3 9 57821 0.0036 0.3362 0.50573 17 3 10 57822 0.0041 0.3377 0.50433 17 3 11 57823 0.0046 0.3395 0.50289 17 3 12 57824 0.0047 0.3414 0.50133 17 3 13 57825 0.0044 0.3431 0.49962 17 3 14 57826 0.0042 0.3444 0.49795 17 3 15 57827 0.0040 0.3459 0.49635 17 3 16 57828 0.0040 0.3471 0.49481 17 3 17 57829 0.0041 0.3489 0.49342 17 3 18 57830 0.0045 0.3509 0.49212 17 3 19 57831 0.0049 0.3531 0.49092 17 3 20 57832 0.0053 0.3556 0.48979 17 3 21 57833 0.0055 0.3580 0.48866 17 3 22 57834 0.0057 0.3602 0.48751 17 3 23 57835 0.0060 0.3626 0.48625 17 3 24 57836 0.0055 0.3648 0.48486 17 3 25 57837 0.0050 0.3666 0.48339 17 3 26 57838 0.0049 0.3683 0.48172 17 3 27 57839 0.0050 0.3702 0.47990 17 3 28 57840 0.0051 0.3720 0.47802 17 3 29 57841 0.0053 0.3735 0.47602 17 3 30 57842 0.0054 0.3750 0.47403 17 3 31 57843 0.0050 0.3763 0.47219 17 4 1 57844 0.0053 0.3775 0.47047 _______________________________________________________________________ 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 = 0.1178 - 0.0344 cos A + 0.0860 sin A - 0.0413 cos C - 0.0173 sin C y = 0.3713 + 0.0787 cos A + 0.0355 sin A - 0.0173 cos C + 0.0413 sin C UT1-UTC = 0.4490 - 0.00115 (MJD - 57885) - (UT2-UT1) where A = 2*pi*(MJD-57877)/365.25 and C = 2*pi*(MJD-57877)/435. TAI-UTC(MJD 57878) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-57877)**0.80 S t = 0.00025 (MJD-57877)**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 5 57878 0.0427 0.4362 0.41603 2017 5 6 57879 0.0440 0.4372 0.41443 2017 5 7 57880 0.0453 0.4382 0.41283 2017 5 8 57881 0.0466 0.4391 0.41129 2017 5 9 57882 0.0479 0.4400 0.40985 2017 5 10 57883 0.0493 0.4409 0.40854 2017 5 11 57884 0.0508 0.4419 0.40735 2017 5 12 57885 0.0523 0.4428 0.40627 2017 5 13 57886 0.0537 0.4437 0.40531 2017 5 14 57887 0.0552 0.4446 0.40442 2017 5 15 57888 0.0566 0.4454 0.40355 2017 5 16 57889 0.0580 0.4462 0.40267 2017 5 17 57890 0.0595 0.4470 0.40178 2017 5 18 57891 0.0610 0.4477 0.40081 2017 5 19 57892 0.0626 0.4485 0.39974 2017 5 20 57893 0.0642 0.4492 0.39851 2017 5 21 57894 0.0658 0.4499 0.39711 2017 5 22 57895 0.0674 0.4505 0.39557 2017 5 23 57896 0.0689 0.4511 0.39396 2017 5 24 57897 0.0705 0.4517 0.39236 2017 5 25 57898 0.0721 0.4523 0.39083 2017 5 26 57899 0.0737 0.4528 0.38947 2017 5 27 57900 0.0753 0.4533 0.38828 2017 5 28 57901 0.0769 0.4537 0.38725 2017 5 29 57902 0.0785 0.4542 0.38630 2017 5 30 57903 0.0802 0.4546 0.38538 2017 5 31 57904 0.0818 0.4550 0.38445 2017 6 1 57905 0.0835 0.4553 0.38351 2017 6 2 57906 0.0852 0.4557 0.38255 2017 6 3 57907 0.0868 0.4560 0.38161 2017 6 4 57908 0.0885 0.4563 0.38073 2017 6 5 57909 0.0902 0.4566 0.37992 2017 6 6 57910 0.0918 0.4568 0.37921 2017 6 7 57911 0.0935 0.4570 0.37863 2017 6 8 57912 0.0952 0.4572 0.37817 2017 6 9 57913 0.0969 0.4573 0.37783 2017 6 10 57914 0.0986 0.4575 0.37760 2017 6 11 57915 0.1003 0.4576 0.37743 2017 6 12 57916 0.1020 0.4576 0.37729 2017 6 13 57917 0.1037 0.4577 0.37713 2017 6 14 57918 0.1053 0.4577 0.37691 2017 6 15 57919 0.1070 0.4577 0.37660 2017 6 16 57920 0.1087 0.4577 0.37617 2017 6 17 57921 0.1104 0.4576 0.37561 2017 6 18 57922 0.1121 0.4575 0.37495 2017 6 19 57923 0.1138 0.4574 0.37422 2017 6 20 57924 0.1154 0.4572 0.37346 2017 6 21 57925 0.1171 0.4571 0.37276 2017 6 22 57926 0.1188 0.4569 0.37216 2017 6 23 57927 0.1204 0.4567 0.37171 2017 6 24 57928 0.1221 0.4564 0.37136 2017 6 25 57929 0.1237 0.4561 0.37107 2017 6 26 57930 0.1254 0.4558 0.37077 2017 6 27 57931 0.1270 0.4555 0.37043 2017 6 28 57932 0.1286 0.4552 0.37002 2017 6 29 57933 0.1302 0.4548 0.36956 2017 6 30 57934 0.1319 0.4544 0.36909 2017 7 1 57935 0.1335 0.4540 0.36864 2017 7 2 57936 0.1351 0.4535 0.36826 2017 7 3 57937 0.1366 0.4530 0.36798 2017 7 4 57938 0.1382 0.4525 0.36780 2017 7 5 57939 0.1398 0.4520 0.36773 2017 7 6 57940 0.1413 0.4514 0.36777 2017 7 7 57941 0.1429 0.4509 0.36789 2017 7 8 57942 0.1444 0.4503 0.36808 2017 7 9 57943 0.1459 0.4496 0.36829 2017 7 10 57944 0.1474 0.4490 0.36847 2017 7 11 57945 0.1489 0.4483 0.36858 2017 7 12 57946 0.1504 0.4476 0.36858 2017 7 13 57947 0.1518 0.4469 0.36845 2017 7 14 57948 0.1533 0.4461 0.36818 2017 7 15 57949 0.1547 0.4454 0.36778 2017 7 16 57950 0.1561 0.4446 0.36729 2017 7 17 57951 0.1575 0.4438 0.36676 2017 7 18 57952 0.1589 0.4429 0.36624 2017 7 19 57953 0.1602 0.4421 0.36578 2017 7 20 57954 0.1616 0.4412 0.36544 2017 7 21 57955 0.1629 0.4403 0.36519 2017 7 22 57956 0.1642 0.4394 0.36501 2017 7 23 57957 0.1655 0.4384 0.36483 2017 7 24 57958 0.1668 0.4375 0.36460 2017 7 25 57959 0.1681 0.4365 0.36427 2017 7 26 57960 0.1693 0.4355 0.36385 2017 7 27 57961 0.1705 0.4345 0.36338 2017 7 28 57962 0.1717 0.4334 0.36290 2017 7 29 57963 0.1729 0.4324 0.36245 2017 7 30 57964 0.1740 0.4313 0.36207 2017 7 31 57965 0.1752 0.4302 0.36178 2017 8 1 57966 0.1763 0.4291 0.36160 2017 8 2 57967 0.1774 0.4279 0.36151 2017 8 3 57968 0.1784 0.4268 0.36150 2017 8 4 57969 0.1795 0.4256 0.36154 2017 8 5 57970 0.1805 0.4244 0.36160 2017 8 6 57971 0.1815 0.4232 0.36163 2017 8 7 57972 0.1824 0.4220 0.36159 2017 8 8 57973 0.1834 0.4208 0.36144 2017 8 9 57974 0.1843 0.4195 0.36116 2017 8 10 57975 0.1852 0.4183 0.36071 2017 8 11 57976 0.1861 0.4170 0.36013 2017 8 12 57977 0.1870 0.4157 0.35943 2017 8 13 57978 0.1878 0.4144 0.35868 2017 8 14 57979 0.1886 0.4131 0.35794 2017 8 15 57980 0.1894 0.4117 0.35725 2017 8 16 57981 0.1901 0.4104 0.35664 2017 8 17 57982 0.1908 0.4090 0.35612 2017 8 18 57983 0.1915 0.4077 0.35567 2017 8 19 57984 0.1922 0.4063 0.35523 2017 8 20 57985 0.1928 0.4049 0.35473 2017 8 21 57986 0.1935 0.4035 0.35415 2017 8 22 57987 0.1941 0.4021 0.35345 2017 8 23 57988 0.1946 0.4007 0.35265 2017 8 24 57989 0.1952 0.3992 0.35180 2017 8 25 57990 0.1957 0.3978 0.35095 2017 8 26 57991 0.1961 0.3964 0.35014 2017 8 27 57992 0.1966 0.3949 0.34943 2017 8 28 57993 0.1970 0.3934 0.34881 2017 8 29 57994 0.1974 0.3920 0.34830 2017 8 30 57995 0.1978 0.3905 0.34787 2017 8 31 57996 0.1981 0.3890 0.34750 2017 9 1 57997 0.1985 0.3875 0.34716 2017 9 2 57998 0.1987 0.3860 0.34680 2017 9 3 57999 0.1990 0.3845 0.34637 2017 9 4 58000 0.1992 0.3830 0.34583 2017 9 5 58001 0.1994 0.3815 0.34514 2017 9 6 58002 0.1996 0.3800 0.34429 2017 9 7 58003 0.1997 0.3785 0.34327 2017 9 8 58004 0.1999 0.3770 0.34212 2017 9 9 58005 0.1999 0.3755 0.34090 2017 9 10 58006 0.2000 0.3740 0.33968 2017 9 11 58007 0.2000 0.3724 0.33852 2017 9 12 58008 0.2000 0.3709 0.33746 2017 9 13 58009 0.2000 0.3694 0.33650 2017 9 14 58010 0.1999 0.3679 0.33562 2017 9 15 58011 0.1999 0.3664 0.33477 2017 9 16 58012 0.1997 0.3649 0.33388 2017 9 17 58013 0.1996 0.3633 0.33290 2017 9 18 58014 0.1994 0.3618 0.33180 2017 9 19 58015 0.1992 0.3603 0.33059 2017 9 20 58016 0.1990 0.3588 0.32928 2017 9 21 58017 0.1987 0.3573 0.32794 2017 9 22 58018 0.1985 0.3558 0.32663 2017 9 23 58019 0.1981 0.3543 0.32538 2017 9 24 58020 0.1978 0.3528 0.32423 2017 9 25 58021 0.1974 0.3513 0.32319 2017 9 26 58022 0.1970 0.3498 0.32225 2017 9 27 58023 0.1966 0.3484 0.32139 2017 9 28 58024 0.1962 0.3469 0.32057 2017 9 29 58025 0.1957 0.3454 0.31975 2017 9 30 58026 0.1952 0.3440 0.31889 2017 10 1 58027 0.1946 0.3425 0.31793 2017 10 2 58028 0.1941 0.3411 0.31684 2017 10 3 58029 0.1935 0.3397 0.31559 2017 10 4 58030 0.1929 0.3382 0.31416 2017 10 5 58031 0.1922 0.3368 0.31257 2017 10 6 58032 0.1916 0.3354 0.31088 2017 10 7 58033 0.1909 0.3340 0.30915 2017 10 8 58034 0.1902 0.3327 0.30746 2017 10 9 58035 0.1894 0.3313 0.30589 2017 10 10 58036 0.1887 0.3299 0.30444 2017 10 11 58037 0.1879 0.3286 0.30311 2017 10 12 58038 0.1871 0.3273 0.30184 2017 10 13 58039 0.1862 0.3259 0.30058 2017 10 14 58040 0.1853 0.3246 0.29925 2017 10 15 58041 0.1845 0.3233 0.29783 2017 10 16 58042 0.1835 0.3221 0.29630 2017 10 17 58043 0.1826 0.3208 0.29469 2017 10 18 58044 0.1816 0.3195 0.29302 2017 10 19 58045 0.1807 0.3183 0.29137 2017 10 20 58046 0.1797 0.3171 0.28977 2017 10 21 58047 0.1786 0.3159 0.28826 2017 10 22 58048 0.1776 0.3147 0.28686 2017 10 23 58049 0.1765 0.3135 0.28558 2017 10 24 58050 0.1754 0.3124 0.28441 2017 10 25 58051 0.1743 0.3112 0.28330 2017 10 26 58052 0.1732 0.3101 0.28223 2017 10 27 58053 0.1720 0.3090 0.28114 2017 10 28 58054 0.1708 0.3079 0.27999 2017 10 29 58055 0.1696 0.3069 0.27874 2017 10 30 58056 0.1684 0.3058 0.27735 2017 10 31 58057 0.1672 0.3048 0.27579 2017 11 1 58058 0.1659 0.3038 0.27408 2017 11 2 58059 0.1647 0.3028 0.27223 2017 11 3 58060 0.1634 0.3018 0.27030 2017 11 4 58061 0.1621 0.3009 0.26837 2017 11 5 58062 0.1608 0.2999 0.26654 2017 11 6 58063 0.1594 0.2990 0.26483 2017 11 7 58064 0.1581 0.2981 0.26327 2017 11 8 58065 0.1567 0.2973 0.26180 2017 11 9 58066 0.1553 0.2964 0.26037 2017 11 10 58067 0.1539 0.2956 0.25890 2017 11 11 58068 0.1525 0.2948 0.25735 2017 11 12 58069 0.1511 0.2940 0.25571 2017 11 13 58070 0.1496 0.2933 0.25398 2017 11 14 58071 0.1482 0.2926 0.25221 2017 11 15 58072 0.1467 0.2918 0.25044 2017 11 16 58073 0.1452 0.2912 0.24873 2017 11 17 58074 0.1438 0.2905 0.24712 2017 11 18 58075 0.1423 0.2899 0.24562 2017 11 19 58076 0.1407 0.2892 0.24426 2017 11 20 58077 0.1392 0.2887 0.24302 2017 11 21 58078 0.1377 0.2881 0.24188 2017 11 22 58079 0.1361 0.2875 0.24080 2017 11 23 58080 0.1346 0.2870 0.23975 2017 11 24 58081 0.1330 0.2865 0.23868 2017 11 25 58082 0.1315 0.2861 0.23755 2017 11 26 58083 0.1299 0.2856 0.23634 2017 11 27 58084 0.1283 0.2852 0.23502 2017 11 28 58085 0.1267 0.2848 0.23356 2017 11 29 58086 0.1251 0.2844 0.23198 2017 11 30 58087 0.1235 0.2841 0.23028 2017 12 1 58088 0.1219 0.2838 0.22854 2017 12 2 58089 0.1203 0.2835 0.22681 2017 12 3 58090 0.1187 0.2832 0.22517 2017 12 4 58091 0.1171 0.2830 0.22366 2017 12 5 58092 0.1155 0.2828 0.22227 2017 12 6 58093 0.1138 0.2826 0.22095 2017 12 7 58094 0.1122 0.2824 0.21962 2017 12 8 58095 0.1106 0.2823 0.21826 2017 12 9 58096 0.1089 0.2822 0.21683 2017 12 10 58097 0.1073 0.2821 0.21537 2017 12 11 58098 0.1057 0.2820 0.21389 2017 12 12 58099 0.1041 0.2820 0.21245 2017 12 13 58100 0.1024 0.2820 0.21110 2017 12 14 58101 0.1008 0.2820 0.20986 2017 12 15 58102 0.0992 0.2820 0.20873 2017 12 16 58103 0.0975 0.2821 0.20770 2017 12 17 58104 0.0959 0.2822 0.20678 2017 12 18 58105 0.0943 0.2823 0.20597 2017 12 19 58106 0.0927 0.2824 0.20524 2017 12 20 58107 0.0911 0.2826 0.20451 2017 12 21 58108 0.0895 0.2828 0.20372 2017 12 22 58109 0.0879 0.2830 0.20285 2017 12 23 58110 0.0863 0.2833 0.20184 2017 12 24 58111 0.0847 0.2836 0.20076 2017 12 25 58112 0.0831 0.2839 0.19956 2017 12 26 58113 0.0815 0.2842 0.19821 2017 12 27 58114 0.0799 0.2845 0.19675 2017 12 28 58115 0.0784 0.2849 0.19525 2017 12 29 58116 0.0768 0.2853 0.19375 2017 12 30 58117 0.0753 0.2857 0.19232 2017 12 31 58118 0.0738 0.2862 0.19102 2018 1 1 58119 0.0722 0.2866 0.18984 2018 1 2 58120 0.0707 0.2871 0.18878 2018 1 3 58121 0.0692 0.2877 0.18778 2018 1 4 58122 0.0677 0.2882 0.18675 2018 1 5 58123 0.0662 0.2888 0.18559 2018 1 6 58124 0.0648 0.2894 0.18432 2018 1 7 58125 0.0633 0.2900 0.18298 2018 1 8 58126 0.0619 0.2906 0.18167 2018 1 9 58127 0.0604 0.2913 0.18031 2018 1 10 58128 0.0590 0.2920 0.17898 2018 1 11 58129 0.0576 0.2927 0.17776 2018 1 12 58130 0.0562 0.2934 0.17666 2018 1 13 58131 0.0549 0.2942 0.17563 2018 1 14 58132 0.0535 0.2949 0.17469 2018 1 15 58133 0.0522 0.2957 0.17383 2018 1 16 58134 0.0508 0.2965 0.17299 2018 1 17 58135 0.0495 0.2974 0.17218 2018 1 18 58136 0.0482 0.2982 0.17135 2018 1 19 58137 0.0470 0.2991 0.17049 2018 1 20 58138 0.0457 0.3000 0.16951 2018 1 21 58139 0.0445 0.3009 0.16839 2018 1 22 58140 0.0432 0.3019 0.16712 2018 1 23 58141 0.0420 0.3028 0.16575 2018 1 24 58142 0.0409 0.3038 0.16428 2018 1 25 58143 0.0397 0.3048 0.16271 2018 1 26 58144 0.0385 0.3058 0.16115 2018 1 27 58145 0.0374 0.3069 0.15965 2018 1 28 58146 0.0363 0.3079 0.15828 2018 1 29 58147 0.0352 0.3090 0.15700 2018 1 30 58148 0.0342 0.3101 0.15576 2018 1 31 58149 0.0331 0.3112 0.15448 2018 2 1 58150 0.0321 0.3123 0.15307 2018 2 2 58151 0.0311 0.3134 0.15149 2018 2 3 58152 0.0302 0.3146 0.14982 2018 2 4 58153 0.0292 0.3157 0.14812 2018 2 5 58154 0.0283 0.3169 0.14641 2018 2 6 58155 0.0274 0.3181 0.14480 2018 2 7 58156 0.0265 0.3193 0.14332 2018 2 8 58157 0.0257 0.3206 0.14195 2018 2 9 58158 0.0248 0.3218 0.14063 2018 2 10 58159 0.0240 0.3231 0.13935 2018 2 11 58160 0.0232 0.3243 0.13812 2018 2 12 58161 0.0225 0.3256 0.13690 2018 2 13 58162 0.0217 0.3269 0.13571 2018 2 14 58163 0.0210 0.3282 0.13449 2018 2 15 58164 0.0204 0.3295 0.13319 2018 2 16 58165 0.0197 0.3308 0.13177 2018 2 17 58166 0.0191 0.3322 0.13021 2018 2 18 58167 0.0185 0.3335 0.12851 2018 2 19 58168 0.0179 0.3349 0.12670 2018 2 20 58169 0.0173 0.3362 0.12487 2018 2 21 58170 0.0168 0.3376 0.12306 2018 2 22 58171 0.0163 0.3390 0.12126 2018 2 23 58172 0.0158 0.3404 0.11957 2018 2 24 58173 0.0154 0.3418 0.11802 2018 2 25 58174 0.0150 0.3432 0.11662 2018 2 26 58175 0.0146 0.3446 0.11531 2018 2 27 58176 0.0142 0.3460 0.11400 2018 2 28 58177 0.0139 0.3475 0.11264 2018 3 1 58178 0.0136 0.3489 0.11112 2018 3 2 58179 0.0133 0.3503 0.10939 2018 3 3 58180 0.0130 0.3518 0.10751 2018 3 4 58181 0.0128 0.3532 0.10558 2018 3 5 58182 0.0126 0.3546 0.10369 2018 3 6 58183 0.0124 0.3561 0.10193 2018 3 7 58184 0.0123 0.3576 0.10030 2018 3 8 58185 0.0122 0.3590 0.09882 2018 3 9 58186 0.0121 0.3605 0.09747 2018 3 10 58187 0.0120 0.3619 0.09619 2018 3 11 58188 0.0120 0.3634 0.09489 2018 3 12 58189 0.0120 0.3648 0.09358 2018 3 13 58190 0.0120 0.3663 0.09226 2018 3 14 58191 0.0121 0.3678 0.09079 2018 3 15 58192 0.0121 0.3692 0.08913 2018 3 16 58193 0.0122 0.3707 0.08735 2018 3 17 58194 0.0124 0.3721 0.08544 2018 3 18 58195 0.0125 0.3736 0.08339 2018 3 19 58196 0.0127 0.3751 0.08121 2018 3 20 58197 0.0130 0.3765 0.07896 2018 3 21 58198 0.0132 0.3779 0.07669 2018 3 22 58199 0.0135 0.3794 0.07446 2018 3 23 58200 0.0138 0.3808 0.07239 2018 3 24 58201 0.0141 0.3823 0.07049 2018 3 25 58202 0.0145 0.3837 0.06865 2018 3 26 58203 0.0148 0.3851 0.06683 2018 3 27 58204 0.0152 0.3865 0.06501 2018 3 28 58205 0.0157 0.3879 0.06310 2018 3 29 58206 0.0161 0.3893 0.06108 2018 3 30 58207 0.0166 0.3907 0.05899 2018 3 31 58208 0.0171 0.3921 0.05687 2018 4 1 58209 0.0177 0.3935 0.05476 2018 4 2 58210 0.0183 0.3949 0.05277 2018 4 3 58211 0.0188 0.3962 0.05093 2018 4 4 58212 0.0195 0.3976 0.04923 2018 4 5 58213 0.0201 0.3989 0.04768 2018 4 6 58214 0.0208 0.4003 0.04621 2018 4 7 58215 0.0215 0.4016 0.04486 2018 4 8 58216 0.0222 0.4029 0.04353 2018 4 9 58217 0.0229 0.4042 0.04216 2018 4 10 58218 0.0237 0.4055 0.04072 2018 4 11 58219 0.0245 0.4068 0.03915 2018 4 12 58220 0.0253 0.4080 0.03742 2018 4 13 58221 0.0261 0.4093 0.03555 2018 4 14 58222 0.0270 0.4105 0.03350 2018 4 15 58223 0.0279 0.4118 0.03128 2018 4 16 58224 0.0288 0.4130 0.02895 2018 4 17 58225 0.0297 0.4142 0.02663 2018 4 18 58226 0.0307 0.4153 0.02438 2018 4 19 58227 0.0316 0.4165 0.02226 2018 4 20 58228 0.0326 0.4177 0.02025 2018 4 21 58229 0.0337 0.4188 0.01830 2018 4 22 58230 0.0347 0.4199 0.01640 2018 4 23 58231 0.0358 0.4210 0.01448 2018 4 24 58232 0.0368 0.4221 0.01246 2018 4 25 58233 0.0379 0.4232 0.01029 2018 4 26 58234 0.0390 0.4242 0.00801 2018 4 27 58235 0.0402 0.4252 0.00565 2018 4 28 58236 0.0413 0.4262 0.00325 2018 4 29 58237 0.0425 0.4272 0.00086 2018 4 30 58238 0.0437 0.4282 -0.00148 2018 5 1 58239 0.0449 0.4292 -0.00368 2018 5 2 58240 0.0461 0.4301 -0.00568 2018 5 3 58241 0.0474 0.4310 -0.00744 2018 5 4 58242 0.0486 0.4319 -0.00904 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) 57851 -97.76 0.30 -12.71 0.02 57852 -97.69 0.30 -12.73 0.02 57853 -97.74 0.30 -12.70 0.02 57854 -97.78 0.30 -12.62 0.15 57855 -97.85 0.30 -12.53 0.15 57856 -98.00 0.30 -12.51 0.15 IERS Celestial Pole Offset Final Series MJD dpsi deps (msec. of arc) 57814 -98.9 -10.8 57815 -99.0 -11.0 57816 -99.3 -11.1 57817 -99.6 -11.2 57818 -99.8 -11.2 57819 -99.8 -11.2 57820 -99.7 -11.3 57821 -99.4 -11.4 57822 -99.1 -11.4 57823 -98.9 -11.4 57824 -98.9 -11.6 57825 -98.8 -11.8 57826 -98.8 -11.9 57827 -98.7 -12.0 57828 -98.9 -11.9 57829 -99.1 -11.9 57830 -99.3 -11.9 57831 -99.3 -11.9 57832 -99.1 -11.8 57833 -98.8 -11.8 57834 -98.5 -11.8 57835 -98.2 -11.9 57836 -98.1 -12.1 57837 -98.2 -12.3 57838 -98.3 -12.3 57839 -98.0 -12.2 57840 -97.7 -11.9 57841 -97.5 -11.9 57842 -97.7 -12.1 57843 -98.2 -12.5 57844 -98.5 -12.7 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 57851 -0.164 0.119 -0.055 0.020 57852 -0.142 0.119 -0.035 0.020 57853 -0.122 0.119 -0.033 0.020 57854 -0.095 0.119 -0.040 0.150 57855 -0.075 0.119 -0.035 0.150 57856 -0.060 0.119 -0.039 0.150 IAU2000A Celestial Pole Offset Final Series MJD dX dY (msec. of arc) 57814 -0.03 -0.29 57815 0.01 -0.27 57816 -0.02 -0.24 57817 -0.04 -0.27 57818 -0.05 -0.20 57819 -0.06 -0.09 57820 -0.12 -0.10 57821 -0.17 -0.18 57822 -0.21 -0.18 57823 -0.21 -0.12 57824 -0.22 -0.17 57825 -0.17 -0.18 57826 -0.17 -0.16 57827 -0.10 -0.25 57828 -0.06 -0.21 57829 0.00 -0.25 57830 0.02 -0.22 57831 0.03 -0.15 57832 0.03 0.02 57833 0.02 0.02 57834 -0.01 0.00 57835 -0.03 -0.08 57836 -0.05 -0.15 57837 -0.07 -0.18 57838 -0.08 -0.12 57839 -0.03 -0.15 57840 -0.03 -0.07 57841 -0.01 -0.13 57842 0.01 -0.13 57843 -0.01 -0.19 57844 0.02 -0.15 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).