********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 3 August 2017 Vol. XXX No. 031 ______________________________________________________________________ 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 = +0.3 seconds beginning 29 Jun 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. * * * * We are currently not able to receive email at * * ser7@maia.usno.navy.mil. Questions and enquiries can now be * * directed to the following email account: navobsy_eop.fct@navy.mil * * * * 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 7 28 57962 0.20705 .00009 0.41691 .00009 0.348840 0.000012 17 7 29 57963 0.20773 .00009 0.41530 .00009 0.348158 0.000010 17 7 30 57964 0.20829 .00009 0.41362 .00009 0.347526 0.000009 17 7 31 57965 0.20892 .00009 0.41181 .00009 0.347004 0.000065 17 8 1 57966 0.20994 .00009 0.40998 .00009 0.346603 0.000065 17 8 2 57967 0.21145 .00009 0.40828 .00009 0.346345 0.000065 17 8 3 57968 0.21321 .00009 0.40668 .00009 0.346182 0.000055 IERS Final Values MJD x y UT1-UTC " " s 17 6 2 57906 0.0977 0.4578 0.37935 17 6 3 57907 0.0996 0.4582 0.37796 17 6 4 57908 0.1011 0.4586 0.37664 17 6 5 57909 0.1027 0.4585 0.37542 17 6 6 57910 0.1039 0.4584 0.37432 17 6 7 57911 0.1054 0.4583 0.37337 17 6 8 57912 0.1069 0.4581 0.37259 17 6 9 57913 0.1085 0.4578 0.37196 17 6 10 57914 0.1100 0.4575 0.37144 17 6 11 57915 0.1115 0.4572 0.37101 17 6 12 57916 0.1130 0.4570 0.37064 17 6 13 57917 0.1146 0.4572 0.37027 17 6 14 57918 0.1163 0.4574 0.36984 17 6 15 57919 0.1183 0.4573 0.36934 17 6 16 57920 0.1206 0.4571 0.36877 17 6 17 57921 0.1226 0.4567 0.36811 17 6 18 57922 0.1242 0.4562 0.36735 17 6 19 57923 0.1257 0.4557 0.36651 17 6 20 57924 0.1278 0.4553 0.36567 17 6 21 57925 0.1305 0.4550 0.36486 17 6 22 57926 0.1331 0.4548 0.36414 17 6 23 57927 0.1360 0.4545 0.36354 17 6 24 57928 0.1388 0.4541 0.36306 17 6 25 57929 0.1410 0.4540 0.36266 17 6 26 57930 0.1430 0.4535 0.36226 17 6 27 57931 0.1452 0.4526 0.36179 17 6 28 57932 0.1472 0.4517 0.36127 17 6 29 57933 0.1496 0.4508 0.36071 17 6 30 57934 0.1525 0.4499 0.36010 17 7 1 57935 0.1557 0.4492 0.35947 _______________________________________________________________________ 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 = 0.1157 + 0.1233 cos A + 0.0683 sin A - 0.0331 cos C - 0.0135 sin C y = 0.3552 + 0.0672 cos A - 0.1071 sin A - 0.0135 cos C + 0.0331 sin C UT1-UTC = 0.3231 - 0.00112 (MJD - 57976) - (UT2-UT1) where A = 2*pi*(MJD-57968)/365.25 and C = 2*pi*(MJD-57968)/435. TAI-UTC(MJD 57969) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-57968)**0.80 S t = 0.00025 (MJD-57968)**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 8 4 57969 0.2147 0.4053 0.34604 2017 8 5 57970 0.2161 0.4038 0.34591 2017 8 6 57971 0.2172 0.4025 0.34575 2017 8 7 57972 0.2181 0.4011 0.34557 2017 8 8 57973 0.2187 0.3997 0.34532 2017 8 9 57974 0.2193 0.3982 0.34498 2017 8 10 57975 0.2199 0.3966 0.34453 2017 8 11 57976 0.2204 0.3950 0.34395 2017 8 12 57977 0.2210 0.3934 0.34326 2017 8 13 57978 0.2215 0.3918 0.34248 2017 8 14 57979 0.2221 0.3902 0.34165 2017 8 15 57980 0.2226 0.3887 0.34084 2017 8 16 57981 0.2230 0.3871 0.34010 2017 8 17 57982 0.2233 0.3856 0.33945 2017 8 18 57983 0.2235 0.3840 0.33884 2017 8 19 57984 0.2237 0.3824 0.33823 2017 8 20 57985 0.2239 0.3808 0.33759 2017 8 21 57986 0.2242 0.3792 0.33687 2017 8 22 57987 0.2244 0.3775 0.33603 2017 8 23 57988 0.2246 0.3759 0.33511 2017 8 24 57989 0.2248 0.3743 0.33416 2017 8 25 57990 0.2250 0.3727 0.33321 2017 8 26 57991 0.2251 0.3711 0.33229 2017 8 27 57992 0.2251 0.3695 0.33144 2017 8 28 57993 0.2251 0.3679 0.33068 2017 8 29 57994 0.2250 0.3663 0.33002 2017 8 30 57995 0.2249 0.3647 0.32945 2017 8 31 57996 0.2248 0.3631 0.32895 2017 9 1 57997 0.2247 0.3614 0.32847 2017 9 2 57998 0.2245 0.3598 0.32799 2017 9 3 57999 0.2243 0.3582 0.32744 2017 9 4 58000 0.2241 0.3566 0.32679 2017 9 5 58001 0.2238 0.3550 0.32600 2017 9 6 58002 0.2235 0.3534 0.32506 2017 9 7 58003 0.2231 0.3518 0.32396 2017 9 8 58004 0.2228 0.3502 0.32273 2017 9 9 58005 0.2224 0.3486 0.32144 2017 9 10 58006 0.2219 0.3470 0.32014 2017 9 11 58007 0.2215 0.3455 0.31889 2017 9 12 58008 0.2210 0.3439 0.31773 2017 9 13 58009 0.2204 0.3423 0.31667 2017 9 14 58010 0.2199 0.3407 0.31567 2017 9 15 58011 0.2193 0.3392 0.31468 2017 9 16 58012 0.2187 0.3376 0.31364 2017 9 17 58013 0.2180 0.3361 0.31250 2017 9 18 58014 0.2174 0.3346 0.31123 2017 9 19 58015 0.2166 0.3330 0.30984 2017 9 20 58016 0.2159 0.3315 0.30836 2017 9 21 58017 0.2151 0.3300 0.30685 2017 9 22 58018 0.2143 0.3285 0.30536 2017 9 23 58019 0.2135 0.3270 0.30394 2017 9 24 58020 0.2126 0.3255 0.30262 2017 9 25 58021 0.2118 0.3241 0.30140 2017 9 26 58022 0.2108 0.3226 0.30028 2017 9 27 58023 0.2099 0.3212 0.29925 2017 9 28 58024 0.2089 0.3197 0.29826 2017 9 29 58025 0.2079 0.3183 0.29727 2017 9 30 58026 0.2069 0.3169 0.29624 2017 10 1 58027 0.2058 0.3155 0.29513 2017 10 2 58028 0.2048 0.3141 0.29389 2017 10 3 58029 0.2036 0.3128 0.29249 2017 10 4 58030 0.2025 0.3114 0.29091 2017 10 5 58031 0.2013 0.3101 0.28917 2017 10 6 58032 0.2002 0.3088 0.28733 2017 10 7 58033 0.1989 0.3075 0.28545 2017 10 8 58034 0.1977 0.3062 0.28362 2017 10 9 58035 0.1964 0.3049 0.28190 2017 10 10 58036 0.1951 0.3037 0.28031 2017 10 11 58037 0.1938 0.3024 0.27884 2017 10 12 58038 0.1925 0.3012 0.27744 2017 10 13 58039 0.1911 0.3000 0.27605 2017 10 14 58040 0.1897 0.2988 0.27461 2017 10 15 58041 0.1883 0.2977 0.27309 2017 10 16 58042 0.1869 0.2965 0.27148 2017 10 17 58043 0.1855 0.2954 0.26978 2017 10 18 58044 0.1840 0.2943 0.26804 2017 10 19 58045 0.1825 0.2932 0.26632 2017 10 20 58046 0.1810 0.2922 0.26467 2017 10 21 58047 0.1794 0.2911 0.26311 2017 10 22 58048 0.1779 0.2901 0.26167 2017 10 23 58049 0.1763 0.2891 0.26035 2017 10 24 58050 0.1747 0.2881 0.25915 2017 10 25 58051 0.1731 0.2872 0.25802 2017 10 26 58052 0.1714 0.2863 0.25693 2017 10 27 58053 0.1698 0.2854 0.25584 2017 10 28 58054 0.1681 0.2845 0.25469 2017 10 29 58055 0.1664 0.2836 0.25344 2017 10 30 58056 0.1647 0.2828 0.25206 2017 10 31 58057 0.1630 0.2820 0.25052 2017 11 1 58058 0.1613 0.2812 0.24884 2017 11 2 58059 0.1595 0.2804 0.24703 2017 11 3 58060 0.1577 0.2797 0.24515 2017 11 4 58061 0.1559 0.2790 0.24329 2017 11 5 58062 0.1542 0.2783 0.24152 2017 11 6 58063 0.1523 0.2776 0.23988 2017 11 7 58064 0.1505 0.2770 0.23839 2017 11 8 58065 0.1487 0.2764 0.23701 2017 11 9 58066 0.1468 0.2758 0.23566 2017 11 10 58067 0.1450 0.2753 0.23429 2017 11 11 58068 0.1431 0.2747 0.23285 2017 11 12 58069 0.1412 0.2742 0.23133 2017 11 13 58070 0.1393 0.2737 0.22974 2017 11 14 58071 0.1374 0.2733 0.22812 2017 11 15 58072 0.1355 0.2729 0.22651 2017 11 16 58073 0.1336 0.2725 0.22495 2017 11 17 58074 0.1317 0.2721 0.22349 2017 11 18 58075 0.1297 0.2718 0.22215 2017 11 19 58076 0.1278 0.2715 0.22093 2017 11 20 58077 0.1258 0.2712 0.21977 2017 11 21 58078 0.1239 0.2710 0.21870 2017 11 22 58079 0.1219 0.2707 0.21770 2017 11 23 58080 0.1200 0.2705 0.21672 2017 11 24 58081 0.1180 0.2704 0.21570 2017 11 25 58082 0.1160 0.2702 0.21462 2017 11 26 58083 0.1140 0.2701 0.21342 2017 11 27 58084 0.1121 0.2700 0.21209 2017 11 28 58085 0.1101 0.2700 0.21062 2017 11 29 58086 0.1081 0.2700 0.20901 2017 11 30 58087 0.1061 0.2700 0.20730 2017 12 1 58088 0.1041 0.2700 0.20555 2017 12 2 58089 0.1021 0.2701 0.20384 2017 12 3 58090 0.1002 0.2702 0.20224 2017 12 4 58091 0.0982 0.2703 0.20078 2017 12 5 58092 0.0962 0.2704 0.19944 2017 12 6 58093 0.0942 0.2706 0.19818 2017 12 7 58094 0.0923 0.2708 0.19692 2017 12 8 58095 0.0903 0.2711 0.19560 2017 12 9 58096 0.0883 0.2713 0.19421 2017 12 10 58097 0.0864 0.2716 0.19275 2017 12 11 58098 0.0844 0.2720 0.19126 2017 12 12 58099 0.0825 0.2723 0.18979 2017 12 13 58100 0.0805 0.2727 0.18837 2017 12 14 58101 0.0786 0.2731 0.18704 2017 12 15 58102 0.0766 0.2736 0.18583 2017 12 16 58103 0.0747 0.2740 0.18474 2017 12 17 58104 0.0728 0.2745 0.18377 2017 12 18 58105 0.0709 0.2751 0.18290 2017 12 19 58106 0.0690 0.2756 0.18211 2017 12 20 58107 0.0671 0.2762 0.18135 2017 12 21 58108 0.0652 0.2768 0.18057 2017 12 22 58109 0.0634 0.2775 0.17974 2017 12 23 58110 0.0615 0.2781 0.17882 2017 12 24 58111 0.0597 0.2788 0.17778 2017 12 25 58112 0.0579 0.2796 0.17660 2017 12 26 58113 0.0560 0.2803 0.17530 2017 12 27 58114 0.0542 0.2811 0.17389 2017 12 28 58115 0.0525 0.2819 0.17242 2017 12 29 58116 0.0507 0.2827 0.17094 2017 12 30 58117 0.0489 0.2836 0.16952 2017 12 31 58118 0.0472 0.2845 0.16821 2018 1 1 58119 0.0455 0.2854 0.16701 2018 1 2 58120 0.0438 0.2863 0.16589 2018 1 3 58121 0.0421 0.2873 0.16477 2018 1 4 58122 0.0404 0.2883 0.16360 2018 1 5 58123 0.0387 0.2893 0.16233 2018 1 6 58124 0.0371 0.2904 0.16097 2018 1 7 58125 0.0355 0.2914 0.15955 2018 1 8 58126 0.0339 0.2925 0.15813 2018 1 9 58127 0.0323 0.2936 0.15676 2018 1 10 58128 0.0308 0.2948 0.15547 2018 1 11 58129 0.0292 0.2959 0.15430 2018 1 12 58130 0.0277 0.2971 0.15326 2018 1 13 58131 0.0262 0.2983 0.15233 2018 1 14 58132 0.0248 0.2996 0.15151 2018 1 15 58133 0.0233 0.3008 0.15075 2018 1 16 58134 0.0219 0.3021 0.15003 2018 1 17 58135 0.0205 0.3034 0.14930 2018 1 18 58136 0.0191 0.3047 0.14851 2018 1 19 58137 0.0178 0.3061 0.14763 2018 1 20 58138 0.0164 0.3074 0.14663 2018 1 21 58139 0.0151 0.3088 0.14550 2018 1 22 58140 0.0139 0.3102 0.14425 2018 1 23 58141 0.0126 0.3117 0.14289 2018 1 24 58142 0.0114 0.3131 0.14146 2018 1 25 58143 0.0102 0.3146 0.14002 2018 1 26 58144 0.0090 0.3161 0.13861 2018 1 27 58145 0.0079 0.3176 0.13729 2018 1 28 58146 0.0068 0.3191 0.13605 2018 1 29 58147 0.0057 0.3206 0.13490 2018 1 30 58148 0.0046 0.3222 0.13377 2018 1 31 58149 0.0036 0.3237 0.13260 2018 2 1 58150 0.0026 0.3253 0.13132 2018 2 2 58151 0.0016 0.3269 0.12993 2018 2 3 58152 0.0007 0.3286 0.12844 2018 2 4 58153 -0.0002 0.3302 0.12693 2018 2 5 58154 -0.0011 0.3318 0.12546 2018 2 6 58155 -0.0020 0.3335 0.12411 2018 2 7 58156 -0.0028 0.3352 0.12290 2018 2 8 58157 -0.0036 0.3369 0.12185 2018 2 9 58158 -0.0043 0.3386 0.12097 2018 2 10 58159 -0.0051 0.3403 0.12021 2018 2 11 58160 -0.0058 0.3420 0.11955 2018 2 12 58161 -0.0064 0.3438 0.11892 2018 2 13 58162 -0.0070 0.3455 0.11828 2018 2 14 58163 -0.0076 0.3473 0.11755 2018 2 15 58164 -0.0082 0.3491 0.11671 2018 2 16 58165 -0.0087 0.3509 0.11570 2018 2 17 58166 -0.0092 0.3526 0.11452 2018 2 18 58167 -0.0097 0.3544 0.11316 2018 2 19 58168 -0.0101 0.3563 0.11167 2018 2 20 58169 -0.0105 0.3581 0.11009 2018 2 21 58170 -0.0109 0.3599 0.10849 2018 2 22 58171 -0.0112 0.3617 0.10693 2018 2 23 58172 -0.0115 0.3636 0.10547 2018 2 24 58173 -0.0118 0.3654 0.10410 2018 2 25 58174 -0.0120 0.3673 0.10281 2018 2 26 58175 -0.0122 0.3691 0.10155 2018 2 27 58176 -0.0124 0.3710 0.10024 2018 2 28 58177 -0.0125 0.3729 0.09881 2018 3 1 58178 -0.0126 0.3747 0.09722 2018 3 2 58179 -0.0127 0.3766 0.09549 2018 3 3 58180 -0.0127 0.3785 0.09364 2018 3 4 58181 -0.0127 0.3803 0.09177 2018 3 5 58182 -0.0127 0.3822 0.08993 2018 3 6 58183 -0.0126 0.3841 0.08816 2018 3 7 58184 -0.0125 0.3860 0.08650 2018 3 8 58185 -0.0124 0.3878 0.08496 2018 3 9 58186 -0.0122 0.3897 0.08353 2018 3 10 58187 -0.0120 0.3916 0.08221 2018 3 11 58188 -0.0117 0.3935 0.08094 2018 3 12 58189 -0.0114 0.3954 0.07970 2018 3 13 58190 -0.0111 0.3972 0.07841 2018 3 14 58191 -0.0108 0.3991 0.07703 2018 3 15 58192 -0.0104 0.4010 0.07555 2018 3 16 58193 -0.0100 0.4028 0.07393 2018 3 17 58194 -0.0095 0.4047 0.07216 2018 3 18 58195 -0.0090 0.4065 0.07024 2018 3 19 58196 -0.0085 0.4084 0.06829 2018 3 20 58197 -0.0080 0.4102 0.06632 2018 3 21 58198 -0.0074 0.4120 0.06440 2018 3 22 58199 -0.0068 0.4139 0.06258 2018 3 23 58200 -0.0061 0.4157 0.06090 2018 3 24 58201 -0.0054 0.4175 0.05929 2018 3 25 58202 -0.0047 0.4193 0.05776 2018 3 26 58203 -0.0040 0.4211 0.05625 2018 3 27 58204 -0.0032 0.4228 0.05467 2018 3 28 58205 -0.0024 0.4246 0.05299 2018 3 29 58206 -0.0015 0.4264 0.05115 2018 3 30 58207 -0.0006 0.4281 0.04919 2018 3 31 58208 0.0003 0.4299 0.04716 2018 4 1 58209 0.0012 0.4316 0.04517 2018 4 2 58210 0.0022 0.4333 0.04327 2018 4 3 58211 0.0032 0.4350 0.04149 2018 4 4 58212 0.0042 0.4367 0.03985 2018 4 5 58213 0.0053 0.4384 0.03832 2018 4 6 58214 0.0064 0.4400 0.03688 2018 4 7 58215 0.0075 0.4417 0.03555 2018 4 8 58216 0.0087 0.4433 0.03432 2018 4 9 58217 0.0099 0.4449 0.03310 2018 4 10 58218 0.0111 0.4465 0.03178 2018 4 11 58219 0.0123 0.4481 0.03034 2018 4 12 58220 0.0136 0.4496 0.02876 2018 4 13 58221 0.0149 0.4512 0.02703 2018 4 14 58222 0.0162 0.4527 0.02519 2018 4 15 58223 0.0175 0.4542 0.02324 2018 4 16 58224 0.0189 0.4557 0.02122 2018 4 17 58225 0.0203 0.4572 0.01918 2018 4 18 58226 0.0218 0.4586 0.01719 2018 4 19 58227 0.0232 0.4601 0.01532 2018 4 20 58228 0.0247 0.4615 0.01355 2018 4 21 58229 0.0262 0.4629 0.01187 2018 4 22 58230 0.0277 0.4643 0.01024 2018 4 23 58231 0.0293 0.4656 0.00863 2018 4 24 58232 0.0309 0.4669 0.00697 2018 4 25 58233 0.0325 0.4682 0.00521 2018 4 26 58234 0.0341 0.4695 0.00334 2018 4 27 58235 0.0357 0.4708 0.00141 2018 4 28 58236 0.0374 0.4720 -0.00051 2018 4 29 58237 0.0391 0.4732 -0.00234 2018 4 30 58238 0.0408 0.4744 -0.00400 2018 5 1 58239 0.0425 0.4756 -0.00549 2018 5 2 58240 0.0443 0.4767 -0.00677 2018 5 3 58241 0.0461 0.4778 -0.00786 2018 5 4 58242 0.0479 0.4789 -0.00880 2018 5 5 58243 0.0497 0.4800 -0.00964 2018 5 6 58244 0.0515 0.4810 -0.01046 2018 5 7 58245 0.0533 0.4820 -0.01136 2018 5 8 58246 0.0552 0.4830 -0.01241 2018 5 9 58247 0.0571 0.4840 -0.01360 2018 5 10 58248 0.0590 0.4849 -0.01496 2018 5 11 58249 0.0609 0.4858 -0.01648 2018 5 12 58250 0.0628 0.4867 -0.01811 2018 5 13 58251 0.0648 0.4875 -0.01983 2018 5 14 58252 0.0667 0.4884 -0.02157 2018 5 15 58253 0.0687 0.4892 -0.02328 2018 5 16 58254 0.0707 0.4899 -0.02486 2018 5 17 58255 0.0727 0.4907 -0.02622 2018 5 18 58256 0.0747 0.4914 -0.02740 2018 5 19 58257 0.0767 0.4920 -0.02849 2018 5 20 58258 0.0787 0.4927 -0.02955 2018 5 21 58259 0.0808 0.4933 -0.03064 2018 5 22 58260 0.0828 0.4939 -0.03180 2018 5 23 58261 0.0849 0.4945 -0.03304 2018 5 24 58262 0.0869 0.4950 -0.03432 2018 5 25 58263 0.0890 0.4955 -0.03556 2018 5 26 58264 0.0911 0.4960 -0.03670 2018 5 27 58265 0.0932 0.4964 -0.03775 2018 5 28 58266 0.0953 0.4968 -0.03869 2018 5 29 58267 0.0974 0.4972 -0.03948 2018 5 30 58268 0.0995 0.4975 -0.04017 2018 5 31 58269 0.1016 0.4979 -0.04077 2018 6 1 58270 0.1037 0.4981 -0.04125 2018 6 2 58271 0.1058 0.4984 -0.04166 2018 6 3 58272 0.1080 0.4986 -0.04211 2018 6 4 58273 0.1101 0.4988 -0.04260 2018 6 5 58274 0.1122 0.4990 -0.04317 2018 6 6 58275 0.1143 0.4991 -0.04387 2018 6 7 58276 0.1165 0.4992 -0.04468 2018 6 8 58277 0.1186 0.4993 -0.04558 2018 6 9 58278 0.1207 0.4993 -0.04654 2018 6 10 58279 0.1228 0.4993 -0.04752 2018 6 11 58280 0.1250 0.4993 -0.04848 2018 6 12 58281 0.1271 0.4993 -0.04932 2018 6 13 58282 0.1292 0.4992 -0.04999 2018 6 14 58283 0.1313 0.4990 -0.05051 2018 6 15 58284 0.1334 0.4989 -0.05095 2018 6 16 58285 0.1355 0.4987 -0.05137 2018 6 17 58286 0.1376 0.4985 -0.05186 2018 6 18 58287 0.1397 0.4983 -0.05244 2018 6 19 58288 0.1418 0.4980 -0.05310 2018 6 20 58289 0.1439 0.4977 -0.05386 2018 6 21 58290 0.1460 0.4973 -0.05468 2018 6 22 58291 0.1480 0.4970 -0.05549 2018 6 23 58292 0.1501 0.4966 -0.05622 2018 6 24 58293 0.1522 0.4962 -0.05678 2018 6 25 58294 0.1542 0.4957 -0.05717 2018 6 26 58295 0.1562 0.4952 -0.05743 2018 6 27 58296 0.1582 0.4947 -0.05757 2018 6 28 58297 0.1602 0.4941 -0.05758 2018 6 29 58298 0.1622 0.4936 -0.05754 2018 6 30 58299 0.1642 0.4930 -0.05746 2018 7 1 58300 0.1662 0.4923 -0.05740 2018 7 2 58301 0.1681 0.4917 -0.05741 2018 7 3 58302 0.1701 0.4910 -0.05748 2018 7 4 58303 0.1720 0.4902 -0.05761 2018 7 5 58304 0.1739 0.4895 -0.05784 2018 7 6 58305 0.1758 0.4887 -0.05819 2018 7 7 58306 0.1777 0.4879 -0.05862 2018 7 8 58307 0.1795 0.4871 -0.05908 2018 7 9 58308 0.1814 0.4862 -0.05948 2018 7 10 58309 0.1832 0.4853 -0.05988 2018 7 11 58310 0.1850 0.4844 -0.06023 2018 7 12 58311 0.1868 0.4834 -0.06051 2018 7 13 58312 0.1886 0.4825 -0.06074 2018 7 14 58313 0.1903 0.4815 -0.06108 2018 7 15 58314 0.1921 0.4804 -0.06154 2018 7 16 58315 0.1938 0.4794 -0.06213 2018 7 17 58316 0.1954 0.4783 -0.06284 2018 7 18 58317 0.1971 0.4772 -0.06357 2018 7 19 58318 0.1988 0.4761 -0.06423 2018 7 20 58319 0.2004 0.4749 -0.06475 2018 7 21 58320 0.2020 0.4737 -0.06513 2018 7 22 58321 0.2035 0.4725 -0.06537 2018 7 23 58322 0.2051 0.4713 -0.06548 2018 7 24 58323 0.2066 0.4700 -0.06546 2018 7 25 58324 0.2081 0.4688 -0.06538 2018 7 26 58325 0.2096 0.4675 -0.06533 2018 7 27 58326 0.2110 0.4661 -0.06530 2018 7 28 58327 0.2125 0.4648 -0.06530 2018 7 29 58328 0.2139 0.4634 -0.06536 2018 7 30 58329 0.2152 0.4621 -0.06551 2018 7 31 58330 0.2166 0.4607 -0.06577 2018 8 1 58331 0.2179 0.4592 -0.06614 2018 8 2 58332 0.2192 0.4578 -0.06663 2018 8 3 58333 0.2204 0.4563 -0.06722 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) 57946 -105.83 0.30 -12.45 0.06 57947 -106.01 0.30 -12.50 0.06 57948 -106.02 0.30 -12.44 0.06 57949 -105.94 0.30 -12.30 0.08 57950 -105.95 0.30 -12.13 0.08 57951 -106.22 0.30 -11.99 0.07 57952 -106.69 0.30 -11.95 0.02 57953 -107.23 0.30 -12.05 0.02 IERS Celestial Pole Offset Final Series MJD dpsi deps (msec. of arc) 57906 -100.7 -12.8 57907 -100.6 -12.8 57908 -100.3 -12.9 57909 -100.1 -12.8 57910 -100.3 -12.7 57911 -100.7 -12.5 57912 -101.1 -12.5 57913 -101.3 -12.6 57914 -101.3 -12.7 57915 -101.2 -12.7 57916 -101.3 -12.7 57917 -101.5 -12.8 57918 -101.7 -12.9 57919 -101.6 -12.9 57920 -101.3 -12.7 57921 -101.2 -12.4 57922 -101.5 -12.3 57923 -102.0 -12.2 57924 -102.6 -12.2 57925 -103.1 -12.2 57926 -103.6 -12.4 57927 -104.1 -12.6 57928 -104.3 -12.7 57929 -104.0 -12.6 57930 -103.6 -12.4 57931 -103.2 -12.5 57932 -103.2 -12.5 57933 -103.7 -12.5 57934 -104.3 -12.4 57935 -104.6 -12.4 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 57946 0.062 0.119 0.123 0.060 57947 0.056 0.119 0.077 0.060 57948 0.069 0.119 0.057 0.060 57949 0.090 0.119 0.047 0.080 57950 0.122 0.119 0.063 0.080 57951 0.148 0.119 0.104 0.070 57952 0.171 0.119 0.145 0.020 57953 0.183 0.119 0.191 0.020 IAU2000A Celestial Pole Offset Final Series MJD dX dY (msec. of arc) 57906 -0.10 0.13 57907 -0.06 0.14 57908 -0.05 0.06 57909 -0.01 0.10 57910 0.01 0.03 57911 0.02 0.08 57912 -0.01 0.08 57913 -0.04 0.10 57914 -0.05 0.12 57915 0.00 0.17 57916 0.01 0.21 57917 0.02 0.21 57918 -0.01 0.18 57919 -0.02 0.12 57920 -0.01 0.10 57921 0.00 0.14 57922 0.00 0.09 57923 0.03 0.13 57924 0.00 0.09 57925 -0.01 0.12 57926 -0.01 0.09 57927 -0.04 0.11 57928 -0.05 0.10 57929 0.00 0.07 57930 -0.02 0.14 57931 -0.01 0.06 57932 0.01 0.17 57933 0.02 0.20 57934 0.03 0.22 57935 0.03 0.16 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).