********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 16 March 2017 Vol. XXX No. 011 ______________________________________________________________________ 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. * * * * Due to unforeseen circumstances, the planned transition of IERS * * RS/PC EOP solution to be consistent with the ITRF 2014 will not * * occur on 16-March-2017. It is anticipated that the transition will * * occur on 23-March-2017. If the transition cannot be done by that * * date, an alternative date to implement the change could be * * 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 3 10 57822 0.00408 .00009 0.33779 .00009 0.504307 0.000012 17 3 11 57823 0.00452 .00009 0.33953 .00009 0.502847 0.000012 17 3 12 57824 0.00462 .00009 0.34141 .00009 0.501274 0.000012 17 3 13 57825 0.00443 .00009 0.34306 .00009 0.499648 0.000008 17 3 14 57826 0.00417 .00009 0.34447 .00009 0.497931 0.000008 17 3 15 57827 0.00403 .00009 0.34586 .00009 0.496298 0.000007 17 3 16 57828 0.00401 .00009 0.34720 .00009 0.494792 0.000055 _______________________________________________________________________ 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 - 0.0843 cos A + 0.0272 sin A - 0.0252 cos C - 0.0385 sin C y = 0.3679 + 0.0225 cos A + 0.0786 sin A - 0.0385 cos C + 0.0252 sin C UT1-UTC = 0.5080 - 0.00119 (MJD - 57836) - (UT2-UT1) where A = 2*pi*(MJD-57828)/365.25 and C = 2*pi*(MJD-57828)/435. TAI-UTC(MJD 57829) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-57828)**0.80 S t = 0.00025 (MJD-57828)**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 17 57829 0.0040 0.3486 0.49342 2017 3 18 57830 0.0041 0.3501 0.49219 2017 3 19 57831 0.0041 0.3516 0.49105 2017 3 20 57832 0.0042 0.3532 0.48998 2017 3 21 57833 0.0042 0.3548 0.48893 2017 3 22 57834 0.0044 0.3564 0.48787 2017 3 23 57835 0.0046 0.3579 0.48675 2017 3 24 57836 0.0048 0.3595 0.48555 2017 3 25 57837 0.0049 0.3612 0.48419 2017 3 26 57838 0.0050 0.3628 0.48265 2017 3 27 57839 0.0051 0.3643 0.48094 2017 3 28 57840 0.0053 0.3658 0.47909 2017 3 29 57841 0.0056 0.3674 0.47715 2017 3 30 57842 0.0060 0.3689 0.47521 2017 3 31 57843 0.0063 0.3705 0.47336 2017 4 1 57844 0.0067 0.3720 0.47166 2017 4 2 57845 0.0070 0.3736 0.47012 2017 4 3 57846 0.0074 0.3751 0.46869 2017 4 4 57847 0.0078 0.3766 0.46734 2017 4 5 57848 0.0082 0.3781 0.46601 2017 4 6 57849 0.0087 0.3796 0.46465 2017 4 7 57850 0.0092 0.3811 0.46322 2017 4 8 57851 0.0097 0.3826 0.46171 2017 4 9 57852 0.0102 0.3840 0.46015 2017 4 10 57853 0.0108 0.3855 0.45857 2017 4 11 57854 0.0114 0.3870 0.45699 2017 4 12 57855 0.0121 0.3884 0.45544 2017 4 13 57856 0.0127 0.3899 0.45395 2017 4 14 57857 0.0134 0.3913 0.45255 2017 4 15 57858 0.0141 0.3927 0.45125 2017 4 16 57859 0.0148 0.3942 0.45004 2017 4 17 57860 0.0156 0.3956 0.44889 2017 4 18 57861 0.0163 0.3969 0.44776 2017 4 19 57862 0.0171 0.3983 0.44662 2017 4 20 57863 0.0180 0.3997 0.44541 2017 4 21 57864 0.0188 0.4011 0.44409 2017 4 22 57865 0.0197 0.4024 0.44262 2017 4 23 57866 0.0206 0.4037 0.44098 2017 4 24 57867 0.0215 0.4050 0.43918 2017 4 25 57868 0.0225 0.4063 0.43727 2017 4 26 57869 0.0235 0.4076 0.43535 2017 4 27 57870 0.0245 0.4089 0.43349 2017 4 28 57871 0.0255 0.4101 0.43176 2017 4 29 57872 0.0265 0.4114 0.43020 2017 4 30 57873 0.0276 0.4126 0.42879 2017 5 1 57874 0.0287 0.4138 0.42746 2017 5 2 57875 0.0298 0.4150 0.42616 2017 5 3 57876 0.0309 0.4162 0.42484 2017 5 4 57877 0.0321 0.4173 0.42348 2017 5 5 57878 0.0333 0.4185 0.42206 2017 5 6 57879 0.0345 0.4196 0.42061 2017 5 7 57880 0.0357 0.4207 0.41916 2017 5 8 57881 0.0369 0.4218 0.41774 2017 5 9 57882 0.0382 0.4228 0.41639 2017 5 10 57883 0.0394 0.4239 0.41514 2017 5 11 57884 0.0407 0.4249 0.41400 2017 5 12 57885 0.0420 0.4259 0.41297 2017 5 13 57886 0.0433 0.4269 0.41205 2017 5 14 57887 0.0447 0.4278 0.41122 2017 5 15 57888 0.0460 0.4288 0.41044 2017 5 16 57889 0.0474 0.4297 0.40966 2017 5 17 57890 0.0488 0.4306 0.40884 2017 5 18 57891 0.0502 0.4315 0.40793 2017 5 19 57892 0.0516 0.4323 0.40690 2017 5 20 57893 0.0531 0.4332 0.40571 2017 5 21 57894 0.0545 0.4340 0.40438 2017 5 22 57895 0.0560 0.4348 0.40291 2017 5 23 57896 0.0575 0.4355 0.40139 2017 5 24 57897 0.0590 0.4363 0.39987 2017 5 25 57898 0.0605 0.4370 0.39846 2017 5 26 57899 0.0620 0.4377 0.39721 2017 5 27 57900 0.0635 0.4384 0.39613 2017 5 28 57901 0.0650 0.4390 0.39517 2017 5 29 57902 0.0666 0.4397 0.39427 2017 5 30 57903 0.0681 0.4403 0.39336 2017 5 31 57904 0.0697 0.4409 0.39242 2017 6 1 57905 0.0713 0.4414 0.39143 2017 6 2 57906 0.0729 0.4420 0.39042 2017 6 3 57907 0.0745 0.4425 0.38940 2017 6 4 57908 0.0761 0.4430 0.38842 2017 6 5 57909 0.0777 0.4434 0.38752 2017 6 6 57910 0.0793 0.4439 0.38671 2017 6 7 57911 0.0809 0.4443 0.38602 2017 6 8 57912 0.0826 0.4446 0.38545 2017 6 9 57913 0.0842 0.4450 0.38499 2017 6 10 57914 0.0858 0.4453 0.38463 2017 6 11 57915 0.0875 0.4457 0.38433 2017 6 12 57916 0.0891 0.4459 0.38406 2017 6 13 57917 0.0908 0.4462 0.38376 2017 6 14 57918 0.0924 0.4464 0.38339 2017 6 15 57919 0.0941 0.4466 0.38293 2017 6 16 57920 0.0957 0.4468 0.38234 2017 6 17 57921 0.0974 0.4470 0.38163 2017 6 18 57922 0.0991 0.4471 0.38079 2017 6 19 57923 0.1007 0.4472 0.37987 2017 6 20 57924 0.1024 0.4473 0.37893 2017 6 21 57925 0.1040 0.4474 0.37804 2017 6 22 57926 0.1057 0.4474 0.37726 2017 6 23 57927 0.1074 0.4474 0.37662 2017 6 24 57928 0.1090 0.4474 0.37610 2017 6 25 57929 0.1107 0.4473 0.37566 2017 6 26 57930 0.1123 0.4473 0.37522 2017 6 27 57931 0.1140 0.4472 0.37475 2017 6 28 57932 0.1156 0.4471 0.37421 2017 6 29 57933 0.1173 0.4469 0.37363 2017 6 30 57934 0.1189 0.4467 0.37303 2017 7 1 57935 0.1205 0.4465 0.37246 2017 7 2 57936 0.1221 0.4463 0.37195 2017 7 3 57937 0.1238 0.4461 0.37157 2017 7 4 57938 0.1254 0.4458 0.37129 2017 7 5 57939 0.1270 0.4455 0.37113 2017 7 6 57940 0.1286 0.4452 0.37107 2017 7 7 57941 0.1302 0.4449 0.37110 2017 7 8 57942 0.1317 0.4445 0.37119 2017 7 9 57943 0.1333 0.4441 0.37131 2017 7 10 57944 0.1349 0.4437 0.37140 2017 7 11 57945 0.1364 0.4432 0.37143 2017 7 12 57946 0.1379 0.4428 0.37135 2017 7 13 57947 0.1395 0.4423 0.37114 2017 7 14 57948 0.1410 0.4418 0.37079 2017 7 15 57949 0.1425 0.4412 0.37032 2017 7 16 57950 0.1440 0.4407 0.36976 2017 7 17 57951 0.1455 0.4401 0.36916 2017 7 18 57952 0.1469 0.4395 0.36857 2017 7 19 57953 0.1484 0.4389 0.36806 2017 7 20 57954 0.1498 0.4382 0.36764 2017 7 21 57955 0.1513 0.4376 0.36733 2017 7 22 57956 0.1527 0.4369 0.36708 2017 7 23 57957 0.1541 0.4362 0.36684 2017 7 24 57958 0.1554 0.4354 0.36654 2017 7 25 57959 0.1568 0.4347 0.36614 2017 7 26 57960 0.1581 0.4339 0.36566 2017 7 27 57961 0.1595 0.4331 0.36511 2017 7 28 57962 0.1608 0.4323 0.36456 2017 7 29 57963 0.1621 0.4314 0.36404 2017 7 30 57964 0.1634 0.4306 0.36359 2017 7 31 57965 0.1646 0.4297 0.36324 2017 8 1 57966 0.1659 0.4288 0.36299 2017 8 2 57967 0.1671 0.4279 0.36284 2017 8 3 57968 0.1683 0.4270 0.36278 2017 8 4 57969 0.1695 0.4260 0.36277 2017 8 5 57970 0.1706 0.4251 0.36277 2017 8 6 57971 0.1718 0.4241 0.36275 2017 8 7 57972 0.1729 0.4231 0.36266 2017 8 8 57973 0.1740 0.4220 0.36246 2017 8 9 57974 0.1751 0.4210 0.36211 2017 8 10 57975 0.1761 0.4200 0.36161 2017 8 11 57976 0.1772 0.4189 0.36097 2017 8 12 57977 0.1782 0.4178 0.36023 2017 8 13 57978 0.1792 0.4167 0.35944 2017 8 14 57979 0.1802 0.4156 0.35866 2017 8 15 57980 0.1811 0.4144 0.35794 2017 8 16 57981 0.1820 0.4133 0.35730 2017 8 17 57982 0.1829 0.4121 0.35675 2017 8 18 57983 0.1838 0.4110 0.35627 2017 8 19 57984 0.1847 0.4098 0.35579 2017 8 20 57985 0.1855 0.4086 0.35525 2017 8 21 57986 0.1863 0.4074 0.35461 2017 8 22 57987 0.1871 0.4061 0.35386 2017 8 23 57988 0.1878 0.4049 0.35299 2017 8 24 57989 0.1886 0.4037 0.35208 2017 8 25 57990 0.1893 0.4024 0.35116 2017 8 26 57991 0.1899 0.4011 0.35029 2017 8 27 57992 0.1906 0.3999 0.34951 2017 8 28 57993 0.1912 0.3986 0.34882 2017 8 29 57994 0.1918 0.3973 0.34824 2017 8 30 57995 0.1924 0.3960 0.34774 2017 8 31 57996 0.1929 0.3947 0.34730 2017 9 1 57997 0.1935 0.3933 0.34689 2017 9 2 57998 0.1940 0.3920 0.34645 2017 9 3 57999 0.1944 0.3907 0.34595 2017 9 4 58000 0.1949 0.3893 0.34533 2017 9 5 58001 0.1953 0.3880 0.34456 2017 9 6 58002 0.1957 0.3866 0.34362 2017 9 7 58003 0.1960 0.3852 0.34252 2017 9 8 58004 0.1964 0.3839 0.34129 2017 9 9 58005 0.1967 0.3825 0.33998 2017 9 10 58006 0.1970 0.3811 0.33867 2017 9 11 58007 0.1972 0.3797 0.33742 2017 9 12 58008 0.1975 0.3783 0.33628 2017 9 13 58009 0.1977 0.3770 0.33524 2017 9 14 58010 0.1978 0.3756 0.33428 2017 9 15 58011 0.1980 0.3742 0.33335 2017 9 16 58012 0.1981 0.3728 0.33240 2017 9 17 58013 0.1982 0.3714 0.33136 2017 9 18 58014 0.1982 0.3700 0.33021 2017 9 19 58015 0.1983 0.3686 0.32895 2017 9 20 58016 0.1983 0.3672 0.32762 2017 9 21 58017 0.1983 0.3658 0.32626 2017 9 22 58018 0.1982 0.3644 0.32493 2017 9 23 58019 0.1981 0.3630 0.32369 2017 9 24 58020 0.1980 0.3616 0.32255 2017 9 25 58021 0.1979 0.3602 0.32152 2017 9 26 58022 0.1978 0.3588 0.32060 2017 9 27 58023 0.1976 0.3574 0.31977 2017 9 28 58024 0.1974 0.3560 0.31898 2017 9 29 58025 0.1971 0.3546 0.31819 2017 9 30 58026 0.1969 0.3533 0.31734 2017 10 1 58027 0.1966 0.3519 0.31641 2017 10 2 58028 0.1963 0.3505 0.31533 2017 10 3 58029 0.1959 0.3491 0.31409 2017 10 4 58030 0.1956 0.3478 0.31267 2017 10 5 58031 0.1952 0.3464 0.31109 2017 10 6 58032 0.1947 0.3451 0.30940 2017 10 7 58033 0.1943 0.3437 0.30767 2017 10 8 58034 0.1938 0.3424 0.30596 2017 10 9 58035 0.1933 0.3411 0.30434 2017 10 10 58036 0.1928 0.3398 0.30282 2017 10 11 58037 0.1923 0.3385 0.30142 2017 10 12 58038 0.1917 0.3372 0.30007 2017 10 13 58039 0.1911 0.3359 0.29874 2017 10 14 58040 0.1905 0.3346 0.29737 2017 10 15 58041 0.1898 0.3333 0.29592 2017 10 16 58042 0.1891 0.3321 0.29436 2017 10 17 58043 0.1885 0.3308 0.29269 2017 10 18 58044 0.1877 0.3296 0.29096 2017 10 19 58045 0.1870 0.3283 0.28919 2017 10 20 58046 0.1862 0.3271 0.28746 2017 10 21 58047 0.1854 0.3259 0.28581 2017 10 22 58048 0.1846 0.3247 0.28428 2017 10 23 58049 0.1838 0.3236 0.28290 2017 10 24 58050 0.1830 0.3224 0.28163 2017 10 25 58051 0.1821 0.3212 0.28047 2017 10 26 58052 0.1812 0.3201 0.27932 2017 10 27 58053 0.1803 0.3190 0.27813 2017 10 28 58054 0.1793 0.3179 0.27690 2017 10 29 58055 0.1784 0.3168 0.27556 2017 10 30 58056 0.1774 0.3157 0.27410 2017 10 31 58057 0.1764 0.3146 0.27242 2017 11 1 58058 0.1754 0.3136 0.27067 2017 11 2 58059 0.1743 0.3126 0.26872 2017 11 3 58060 0.1733 0.3115 0.26665 2017 11 4 58061 0.1722 0.3105 0.26448 2017 11 5 58062 0.1711 0.3096 0.26240 2017 11 6 58063 0.1700 0.3086 0.26045 2017 11 7 58064 0.1689 0.3076 0.25863 2017 11 8 58065 0.1677 0.3067 0.25696 2017 11 9 58066 0.1666 0.3058 0.25536 2017 11 10 58067 0.1654 0.3049 0.25372 2017 11 11 58068 0.1642 0.3040 0.25202 2017 11 12 58069 0.1630 0.3032 0.25026 2017 11 13 58070 0.1618 0.3023 0.24840 2017 11 14 58071 0.1605 0.3015 0.24656 2017 11 15 58072 0.1593 0.3007 0.24478 2017 11 16 58073 0.1580 0.3000 0.24302 2017 11 17 58074 0.1567 0.2992 0.24141 2017 11 18 58075 0.1554 0.2985 0.23994 2017 11 19 58076 0.1541 0.2977 0.23868 2017 11 20 58077 0.1528 0.2970 0.23758 2017 11 21 58078 0.1515 0.2964 0.23663 2017 11 22 58079 0.1501 0.2957 0.23579 2017 11 23 58080 0.1488 0.2951 0.23495 2017 11 24 58081 0.1474 0.2945 0.23399 2017 11 25 58082 0.1460 0.2939 0.23293 2017 11 26 58083 0.1446 0.2933 0.23175 2017 11 27 58084 0.1432 0.2928 0.23042 2017 11 28 58085 0.1418 0.2922 0.22897 2017 11 29 58086 0.1404 0.2917 0.22735 2017 11 30 58087 0.1390 0.2912 0.22567 2017 12 1 58088 0.1376 0.2908 0.22394 2017 12 2 58089 0.1362 0.2903 0.22224 2017 12 3 58090 0.1347 0.2899 0.22053 2017 12 4 58091 0.1333 0.2895 0.21894 2017 12 5 58092 0.1318 0.2892 0.21748 2017 12 6 58093 0.1304 0.2888 0.21606 2017 12 7 58094 0.1289 0.2885 0.21457 2017 12 8 58095 0.1274 0.2882 0.21303 2017 12 9 58096 0.1260 0.2879 0.21145 2017 12 10 58097 0.1245 0.2877 0.20977 2017 12 11 58098 0.1230 0.2874 0.20799 2017 12 12 58099 0.1215 0.2872 0.20620 2017 12 13 58100 0.1200 0.2870 0.20443 2017 12 14 58101 0.1186 0.2869 0.20267 2017 12 15 58102 0.1171 0.2867 0.20110 2017 12 16 58103 0.1156 0.2866 0.19968 2017 12 17 58104 0.1141 0.2865 0.19841 2017 12 18 58105 0.1126 0.2864 0.19726 2017 12 19 58106 0.1111 0.2864 0.19624 2017 12 20 58107 0.1096 0.2864 0.19528 2017 12 21 58108 0.1082 0.2864 0.19435 2017 12 22 58109 0.1067 0.2864 0.19340 2017 12 23 58110 0.1052 0.2864 0.19240 2017 12 24 58111 0.1037 0.2865 0.19126 2017 12 25 58112 0.1023 0.2866 0.19004 2017 12 26 58113 0.1008 0.2867 0.18874 2017 12 27 58114 0.0993 0.2868 0.18727 2017 12 28 58115 0.0979 0.2870 0.18576 2017 12 29 58116 0.0964 0.2872 0.18420 2017 12 30 58117 0.0950 0.2874 0.18275 2017 12 31 58118 0.0935 0.2876 0.18132 2018 1 1 58119 0.0921 0.2879 0.17994 2018 1 2 58120 0.0907 0.2881 0.17865 2018 1 3 58121 0.0893 0.2884 0.17735 2018 1 4 58122 0.0878 0.2888 0.17596 2018 1 5 58123 0.0864 0.2891 0.17446 2018 1 6 58124 0.0850 0.2895 0.17284 2018 1 7 58125 0.0837 0.2898 0.17107 2018 1 8 58126 0.0823 0.2902 0.16930 2018 1 9 58127 0.0809 0.2907 0.16751 2018 1 10 58128 0.0796 0.2911 0.16577 2018 1 11 58129 0.0782 0.2916 0.16416 2018 1 12 58130 0.0769 0.2921 0.16264 2018 1 13 58131 0.0756 0.2926 0.16121 2018 1 14 58132 0.0743 0.2931 0.15988 2018 1 15 58133 0.0730 0.2937 0.15866 2018 1 16 58134 0.0717 0.2942 0.15743 2018 1 17 58135 0.0704 0.2948 0.15614 2018 1 18 58136 0.0692 0.2954 0.15480 2018 1 19 58137 0.0679 0.2961 0.15335 2018 1 20 58138 0.0667 0.2967 0.15178 2018 1 21 58139 0.0655 0.2974 0.15000 2018 1 22 58140 0.0643 0.2981 0.14801 2018 1 23 58141 0.0631 0.2988 0.14592 2018 1 24 58142 0.0619 0.2995 0.14380 2018 1 25 58143 0.0608 0.3002 0.14176 2018 1 26 58144 0.0596 0.3010 0.13978 2018 1 27 58145 0.0585 0.3018 0.13792 2018 1 28 58146 0.0574 0.3026 0.13615 2018 1 29 58147 0.0563 0.3034 0.13440 2018 1 30 58148 0.0553 0.3042 0.13269 2018 1 31 58149 0.0542 0.3051 0.13100 2018 2 1 58150 0.0532 0.3059 0.12924 2018 2 2 58151 0.0522 0.3068 0.12743 2018 2 3 58152 0.0512 0.3077 0.12558 2018 2 4 58153 0.0502 0.3086 0.12374 2018 2 5 58154 0.0493 0.3095 0.12195 2018 2 6 58155 0.0484 0.3105 0.12014 2018 2 7 58156 0.0475 0.3114 0.11851 2018 2 8 58157 0.0466 0.3124 0.11695 2018 2 9 58158 0.0457 0.3134 0.11554 2018 2 10 58159 0.0448 0.3144 0.11426 2018 2 11 58160 0.0440 0.3154 0.11305 2018 2 12 58161 0.0432 0.3164 0.11193 2018 2 13 58162 0.0424 0.3174 0.11084 2018 2 14 58163 0.0417 0.3185 0.10979 2018 2 15 58164 0.0409 0.3195 0.10856 2018 2 16 58165 0.0402 0.3206 0.10724 2018 2 17 58166 0.0395 0.3217 0.10576 2018 2 18 58167 0.0389 0.3228 0.10419 2018 2 19 58168 0.0382 0.3239 0.10257 2018 2 20 58169 0.0376 0.3250 0.10087 2018 2 21 58170 0.0370 0.3261 0.09912 2018 2 22 58171 0.0364 0.3272 0.09733 2018 2 23 58172 0.0359 0.3284 0.09562 2018 2 24 58173 0.0353 0.3295 0.09405 2018 2 25 58174 0.0348 0.3307 0.09255 2018 2 26 58175 0.0343 0.3318 0.09108 2018 2 27 58176 0.0339 0.3330 0.08954 2018 2 28 58177 0.0334 0.3342 0.08802 2018 3 1 58178 0.0330 0.3354 0.08632 2018 3 2 58179 0.0327 0.3365 0.08447 2018 3 3 58180 0.0323 0.3377 0.08253 2018 3 4 58181 0.0320 0.3389 0.08050 2018 3 5 58182 0.0317 0.3401 0.07848 2018 3 6 58183 0.0314 0.3414 0.07654 2018 3 7 58184 0.0311 0.3426 0.07476 2018 3 8 58185 0.0309 0.3438 0.07311 2018 3 9 58186 0.0307 0.3450 0.07157 2018 3 10 58187 0.0305 0.3462 0.07025 2018 3 11 58188 0.0303 0.3475 0.06892 2018 3 12 58189 0.0302 0.3487 0.06771 2018 3 13 58190 0.0301 0.3499 0.06640 2018 3 14 58191 0.0300 0.3512 0.06497 2018 3 15 58192 0.0300 0.3524 0.06333 2018 3 16 58193 0.0299 0.3536 0.06151 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) 57809 -99.44 0.11 -10.81 0.04 57810 -99.30 0.30 -10.80 0.04 57811 -99.12 0.30 -10.63 0.04 57812 -99.01 0.30 -10.48 0.01 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 57809 -0.068 0.044 -0.123 0.040 57810 -0.078 0.119 -0.134 0.040 57811 -0.092 0.119 -0.141 0.040 57812 -0.113 0.119 -0.156 0.010 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).