********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 27 July 2017 Vol. XXX No. 030 ______________________________________________________________________ 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 21 57955 0.19785 .00009 0.42885 .00009 0.352075 0.000017 17 7 22 57956 0.19870 .00009 0.42666 .00009 0.351774 0.000017 17 7 23 57957 0.20002 .00009 0.42452 .00009 0.351489 0.000012 17 7 24 57958 0.20172 .00009 0.42273 .00009 0.351163 0.000008 17 7 25 57959 0.20337 .00009 0.42125 .00009 0.350741 0.000010 17 7 26 57960 0.20479 .00009 0.41991 .00009 0.350196 0.000010 17 7 27 57961 0.20606 .00009 0.41848 .00009 0.349547 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 = 0.1177 + 0.1133 cos A + 0.0802 sin A - 0.0319 cos C - 0.0144 sin C y = 0.3555 + 0.0777 cos A - 0.0973 sin A - 0.0144 cos C + 0.0319 sin C UT1-UTC = 0.3342 - 0.00113 (MJD - 57969) - (UT2-UT1) where A = 2*pi*(MJD-57961)/365.25 and C = 2*pi*(MJD-57961)/435. TAI-UTC(MJD 57962) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-57961)**0.80 S t = 0.00025 (MJD-57961)**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 7 28 57962 0.2072 0.4171 0.34886 2017 7 29 57963 0.2082 0.4156 0.34822 2017 7 30 57964 0.2092 0.4141 0.34769 2017 7 31 57965 0.2102 0.4126 0.34728 2017 8 1 57966 0.2111 0.4111 0.34701 2017 8 2 57967 0.2121 0.4096 0.34689 2017 8 3 57968 0.2129 0.4082 0.34689 2017 8 4 57969 0.2137 0.4068 0.34695 2017 8 5 57970 0.2144 0.4053 0.34704 2017 8 6 57971 0.2151 0.4038 0.34706 2017 8 7 57972 0.2158 0.4024 0.34696 2017 8 8 57973 0.2164 0.4009 0.34671 2017 8 9 57974 0.2169 0.3994 0.34630 2017 8 10 57975 0.2174 0.3978 0.34576 2017 8 11 57976 0.2179 0.3963 0.34509 2017 8 12 57977 0.2184 0.3947 0.34432 2017 8 13 57978 0.2189 0.3931 0.34351 2017 8 14 57979 0.2193 0.3915 0.34273 2017 8 15 57980 0.2198 0.3900 0.34198 2017 8 16 57981 0.2202 0.3884 0.34129 2017 8 17 57982 0.2205 0.3869 0.34068 2017 8 18 57983 0.2208 0.3853 0.34011 2017 8 19 57984 0.2211 0.3838 0.33955 2017 8 20 57985 0.2213 0.3822 0.33895 2017 8 21 57986 0.2215 0.3806 0.33824 2017 8 22 57987 0.2217 0.3790 0.33742 2017 8 23 57988 0.2219 0.3774 0.33651 2017 8 24 57989 0.2220 0.3759 0.33555 2017 8 25 57990 0.2221 0.3743 0.33461 2017 8 26 57991 0.2221 0.3727 0.33372 2017 8 27 57992 0.2222 0.3711 0.33293 2017 8 28 57993 0.2221 0.3696 0.33225 2017 8 29 57994 0.2221 0.3680 0.33167 2017 8 30 57995 0.2220 0.3664 0.33118 2017 8 31 57996 0.2219 0.3648 0.33075 2017 9 1 57997 0.2218 0.3632 0.33034 2017 9 2 57998 0.2216 0.3616 0.32989 2017 9 3 57999 0.2214 0.3600 0.32936 2017 9 4 58000 0.2212 0.3584 0.32870 2017 9 5 58001 0.2209 0.3568 0.32788 2017 9 6 58002 0.2206 0.3553 0.32688 2017 9 7 58003 0.2203 0.3537 0.32570 2017 9 8 58004 0.2199 0.3521 0.32439 2017 9 9 58005 0.2195 0.3505 0.32300 2017 9 10 58006 0.2191 0.3490 0.32161 2017 9 11 58007 0.2187 0.3474 0.32027 2017 9 12 58008 0.2182 0.3458 0.31904 2017 9 13 58009 0.2177 0.3443 0.31791 2017 9 14 58010 0.2172 0.3427 0.31685 2017 9 15 58011 0.2166 0.3412 0.31581 2017 9 16 58012 0.2160 0.3397 0.31474 2017 9 17 58013 0.2154 0.3381 0.31359 2017 9 18 58014 0.2147 0.3366 0.31231 2017 9 19 58015 0.2140 0.3351 0.31092 2017 9 20 58016 0.2133 0.3336 0.30945 2017 9 21 58017 0.2126 0.3321 0.30795 2017 9 22 58018 0.2118 0.3306 0.30648 2017 9 23 58019 0.2110 0.3291 0.30508 2017 9 24 58020 0.2101 0.3277 0.30377 2017 9 25 58021 0.2093 0.3262 0.30257 2017 9 26 58022 0.2084 0.3248 0.30147 2017 9 27 58023 0.2075 0.3233 0.30045 2017 9 28 58024 0.2065 0.3219 0.29948 2017 9 29 58025 0.2056 0.3205 0.29850 2017 9 30 58026 0.2046 0.3191 0.29748 2017 10 1 58027 0.2035 0.3177 0.29637 2017 10 2 58028 0.2025 0.3164 0.29515 2017 10 3 58029 0.2014 0.3150 0.29377 2017 10 4 58030 0.2003 0.3137 0.29222 2017 10 5 58031 0.1992 0.3123 0.29053 2017 10 6 58032 0.1980 0.3110 0.28874 2017 10 7 58033 0.1968 0.3097 0.28693 2017 10 8 58034 0.1956 0.3085 0.28517 2017 10 9 58035 0.1944 0.3072 0.28353 2017 10 10 58036 0.1931 0.3060 0.28202 2017 10 11 58037 0.1919 0.3047 0.28064 2017 10 12 58038 0.1906 0.3035 0.27932 2017 10 13 58039 0.1892 0.3023 0.27802 2017 10 14 58040 0.1879 0.3011 0.27666 2017 10 15 58041 0.1865 0.3000 0.27521 2017 10 16 58042 0.1851 0.2988 0.27366 2017 10 17 58043 0.1837 0.2977 0.27203 2017 10 18 58044 0.1822 0.2966 0.27036 2017 10 19 58045 0.1808 0.2955 0.26870 2017 10 20 58046 0.1793 0.2945 0.26711 2017 10 21 58047 0.1778 0.2934 0.26561 2017 10 22 58048 0.1763 0.2924 0.26424 2017 10 23 58049 0.1747 0.2914 0.26300 2017 10 24 58050 0.1732 0.2905 0.26186 2017 10 25 58051 0.1716 0.2895 0.26080 2017 10 26 58052 0.1700 0.2886 0.25978 2017 10 27 58053 0.1684 0.2877 0.25874 2017 10 28 58054 0.1667 0.2868 0.25764 2017 10 29 58055 0.1651 0.2859 0.25643 2017 10 30 58056 0.1634 0.2851 0.25508 2017 10 31 58057 0.1617 0.2843 0.25357 2017 11 1 58058 0.1600 0.2835 0.25190 2017 11 2 58059 0.1583 0.2827 0.25010 2017 11 3 58060 0.1566 0.2820 0.24823 2017 11 4 58061 0.1548 0.2812 0.24636 2017 11 5 58062 0.1531 0.2805 0.24459 2017 11 6 58063 0.1513 0.2799 0.24296 2017 11 7 58064 0.1495 0.2792 0.24148 2017 11 8 58065 0.1477 0.2786 0.24010 2017 11 9 58066 0.1459 0.2780 0.23877 2017 11 10 58067 0.1441 0.2775 0.23741 2017 11 11 58068 0.1423 0.2769 0.23599 2017 11 12 58069 0.1404 0.2764 0.23448 2017 11 13 58070 0.1386 0.2759 0.23286 2017 11 14 58071 0.1367 0.2755 0.23120 2017 11 15 58072 0.1348 0.2750 0.22954 2017 11 16 58073 0.1329 0.2746 0.22794 2017 11 17 58074 0.1311 0.2743 0.22644 2017 11 18 58075 0.1292 0.2739 0.22504 2017 11 19 58076 0.1273 0.2736 0.22377 2017 11 20 58077 0.1254 0.2733 0.22262 2017 11 21 58078 0.1234 0.2730 0.22157 2017 11 22 58079 0.1215 0.2728 0.22057 2017 11 23 58080 0.1196 0.2726 0.21960 2017 11 24 58081 0.1177 0.2724 0.21859 2017 11 25 58082 0.1157 0.2722 0.21751 2017 11 26 58083 0.1138 0.2721 0.21632 2017 11 27 58084 0.1119 0.2720 0.21499 2017 11 28 58085 0.1099 0.2719 0.21352 2017 11 29 58086 0.1080 0.2719 0.21192 2017 11 30 58087 0.1060 0.2719 0.21021 2017 12 1 58088 0.1041 0.2719 0.20846 2017 12 2 58089 0.1021 0.2719 0.20676 2017 12 3 58090 0.1002 0.2720 0.20516 2017 12 4 58091 0.0983 0.2721 0.20370 2017 12 5 58092 0.0963 0.2722 0.20237 2017 12 6 58093 0.0944 0.2724 0.20111 2017 12 7 58094 0.0924 0.2726 0.19985 2017 12 8 58095 0.0905 0.2728 0.19854 2017 12 9 58096 0.0886 0.2731 0.19715 2017 12 10 58097 0.0866 0.2733 0.19570 2017 12 11 58098 0.0847 0.2736 0.19422 2017 12 12 58099 0.0828 0.2740 0.19276 2017 12 13 58100 0.0809 0.2743 0.19135 2017 12 14 58101 0.0790 0.2747 0.19003 2017 12 15 58102 0.0771 0.2751 0.18883 2017 12 16 58103 0.0752 0.2756 0.18775 2017 12 17 58104 0.0733 0.2760 0.18680 2017 12 18 58105 0.0715 0.2765 0.18594 2017 12 19 58106 0.0696 0.2771 0.18515 2017 12 20 58107 0.0678 0.2776 0.18440 2017 12 21 58108 0.0659 0.2782 0.18363 2017 12 22 58109 0.0641 0.2788 0.18280 2017 12 23 58110 0.0623 0.2795 0.18188 2017 12 24 58111 0.0605 0.2801 0.18084 2017 12 25 58112 0.0587 0.2808 0.17966 2017 12 26 58113 0.0569 0.2816 0.17836 2017 12 27 58114 0.0551 0.2823 0.17694 2017 12 28 58115 0.0534 0.2831 0.17546 2017 12 29 58116 0.0516 0.2839 0.17398 2017 12 30 58117 0.0499 0.2847 0.17255 2017 12 31 58118 0.0482 0.2856 0.17123 2018 1 1 58119 0.0465 0.2864 0.17001 2018 1 2 58120 0.0448 0.2874 0.16888 2018 1 3 58121 0.0432 0.2883 0.16775 2018 1 4 58122 0.0415 0.2892 0.16657 2018 1 5 58123 0.0399 0.2902 0.16529 2018 1 6 58124 0.0383 0.2912 0.16392 2018 1 7 58125 0.0367 0.2923 0.16249 2018 1 8 58126 0.0351 0.2933 0.16106 2018 1 9 58127 0.0336 0.2944 0.15968 2018 1 10 58128 0.0321 0.2955 0.15840 2018 1 11 58129 0.0305 0.2966 0.15723 2018 1 12 58130 0.0291 0.2978 0.15620 2018 1 13 58131 0.0276 0.2990 0.15528 2018 1 14 58132 0.0261 0.3002 0.15447 2018 1 15 58133 0.0247 0.3014 0.15374 2018 1 16 58134 0.0233 0.3026 0.15304 2018 1 17 58135 0.0219 0.3039 0.15233 2018 1 18 58136 0.0206 0.3052 0.15158 2018 1 19 58137 0.0193 0.3065 0.15073 2018 1 20 58138 0.0180 0.3078 0.14977 2018 1 21 58139 0.0167 0.3092 0.14868 2018 1 22 58140 0.0154 0.3105 0.14746 2018 1 23 58141 0.0142 0.3119 0.14615 2018 1 24 58142 0.0130 0.3133 0.14479 2018 1 25 58143 0.0118 0.3147 0.14342 2018 1 26 58144 0.0107 0.3162 0.14210 2018 1 27 58145 0.0095 0.3177 0.14087 2018 1 28 58146 0.0084 0.3191 0.13976 2018 1 29 58147 0.0074 0.3206 0.13875 2018 1 30 58148 0.0063 0.3222 0.13778 2018 1 31 58149 0.0053 0.3237 0.13680 2018 2 1 58150 0.0043 0.3252 0.13573 2018 2 2 58151 0.0034 0.3268 0.13456 2018 2 3 58152 0.0024 0.3284 0.13329 2018 2 4 58153 0.0015 0.3300 0.13198 2018 2 5 58154 0.0007 0.3316 0.13066 2018 2 6 58155 -0.0002 0.3332 0.12940 2018 2 7 58156 -0.0010 0.3349 0.12821 2018 2 8 58157 -0.0018 0.3365 0.12712 2018 2 9 58158 -0.0025 0.3382 0.12612 2018 2 10 58159 -0.0032 0.3399 0.12521 2018 2 11 58160 -0.0039 0.3415 0.12435 2018 2 12 58161 -0.0046 0.3432 0.12353 2018 2 13 58162 -0.0052 0.3450 0.12270 2018 2 14 58163 -0.0058 0.3467 0.12183 2018 2 15 58164 -0.0063 0.3484 0.12086 2018 2 16 58165 -0.0069 0.3502 0.11977 2018 2 17 58166 -0.0074 0.3519 0.11852 2018 2 18 58167 -0.0078 0.3537 0.11711 2018 2 19 58168 -0.0083 0.3554 0.11557 2018 2 20 58169 -0.0086 0.3572 0.11394 2018 2 21 58170 -0.0090 0.3590 0.11228 2018 2 22 58171 -0.0093 0.3608 0.11063 2018 2 23 58172 -0.0096 0.3626 0.10904 2018 2 24 58173 -0.0099 0.3644 0.10751 2018 2 25 58174 -0.0101 0.3662 0.10606 2018 2 26 58175 -0.0103 0.3680 0.10462 2018 2 27 58176 -0.0105 0.3699 0.10315 2018 2 28 58177 -0.0106 0.3717 0.10158 2018 3 1 58178 -0.0107 0.3735 0.09985 2018 3 2 58179 -0.0108 0.3753 0.09799 2018 3 3 58180 -0.0108 0.3772 0.09603 2018 3 4 58181 -0.0108 0.3790 0.09403 2018 3 5 58182 -0.0108 0.3808 0.09210 2018 3 6 58183 -0.0107 0.3827 0.09030 2018 3 7 58184 -0.0106 0.3845 0.08863 2018 3 8 58185 -0.0105 0.3864 0.08713 2018 3 9 58186 -0.0103 0.3882 0.08577 2018 3 10 58187 -0.0101 0.3900 0.08449 2018 3 11 58188 -0.0099 0.3919 0.08329 2018 3 12 58189 -0.0096 0.3937 0.08211 2018 3 13 58190 -0.0093 0.3955 0.08091 2018 3 14 58191 -0.0090 0.3974 0.07964 2018 3 15 58192 -0.0086 0.3992 0.07824 2018 3 16 58193 -0.0082 0.4010 0.07670 2018 3 17 58194 -0.0078 0.4028 0.07501 2018 3 18 58195 -0.0073 0.4046 0.07322 2018 3 19 58196 -0.0068 0.4065 0.07136 2018 3 20 58197 -0.0062 0.4083 0.06946 2018 3 21 58198 -0.0057 0.4101 0.06760 2018 3 22 58199 -0.0051 0.4118 0.06577 2018 3 23 58200 -0.0044 0.4136 0.06402 2018 3 24 58201 -0.0038 0.4154 0.06239 2018 3 25 58202 -0.0031 0.4172 0.06088 2018 3 26 58203 -0.0023 0.4189 0.05938 2018 3 27 58204 -0.0016 0.4207 0.05777 2018 3 28 58205 -0.0008 0.4224 0.05601 2018 3 29 58206 0.0000 0.4241 0.05408 2018 3 30 58207 0.0009 0.4258 0.05203 2018 3 31 58208 0.0018 0.4275 0.04993 2018 4 1 58209 0.0027 0.4292 0.04783 2018 4 2 58210 0.0037 0.4309 0.04580 2018 4 3 58211 0.0046 0.4326 0.04385 2018 4 4 58212 0.0056 0.4342 0.04201 2018 4 5 58213 0.0067 0.4359 0.04031 2018 4 6 58214 0.0077 0.4375 0.03870 2018 4 7 58215 0.0088 0.4391 0.03716 2018 4 8 58216 0.0100 0.4407 0.03569 2018 4 9 58217 0.0111 0.4423 0.03426 2018 4 10 58218 0.0123 0.4439 0.03280 2018 4 11 58219 0.0135 0.4454 0.03127 2018 4 12 58220 0.0148 0.4469 0.02962 2018 4 13 58221 0.0160 0.4485 0.02783 2018 4 14 58222 0.0173 0.4500 0.02593 2018 4 15 58223 0.0186 0.4514 0.02396 2018 4 16 58224 0.0200 0.4529 0.02198 2018 4 17 58225 0.0214 0.4544 0.02006 2018 4 18 58226 0.0228 0.4558 0.01828 2018 4 19 58227 0.0242 0.4572 0.01667 2018 4 20 58228 0.0256 0.4586 0.01523 2018 4 21 58229 0.0271 0.4599 0.01391 2018 4 22 58230 0.0286 0.4613 0.01262 2018 4 23 58231 0.0301 0.4626 0.01124 2018 4 24 58232 0.0317 0.4639 0.00970 2018 4 25 58233 0.0332 0.4652 0.00800 2018 4 26 58234 0.0348 0.4664 0.00615 2018 4 27 58235 0.0364 0.4677 0.00419 2018 4 28 58236 0.0380 0.4689 0.00222 2018 4 29 58237 0.0397 0.4701 0.00031 2018 4 30 58238 0.0414 0.4713 -0.00151 2018 5 1 58239 0.0431 0.4724 -0.00320 2018 5 2 58240 0.0448 0.4735 -0.00473 2018 5 3 58241 0.0465 0.4746 -0.00605 2018 5 4 58242 0.0483 0.4757 -0.00720 2018 5 5 58243 0.0500 0.4767 -0.00825 2018 5 6 58244 0.0518 0.4777 -0.00924 2018 5 7 58245 0.0536 0.4787 -0.01024 2018 5 8 58246 0.0554 0.4797 -0.01127 2018 5 9 58247 0.0573 0.4806 -0.01240 2018 5 10 58248 0.0591 0.4816 -0.01362 2018 5 11 58249 0.0610 0.4825 -0.01492 2018 5 12 58250 0.0629 0.4833 -0.01629 2018 5 13 58251 0.0648 0.4841 -0.01774 2018 5 14 58252 0.0667 0.4850 -0.01924 2018 5 15 58253 0.0686 0.4857 -0.02069 2018 5 16 58254 0.0706 0.4865 -0.02206 2018 5 17 58255 0.0725 0.4872 -0.02332 2018 5 18 58256 0.0745 0.4879 -0.02443 2018 5 19 58257 0.0764 0.4886 -0.02545 2018 5 20 58258 0.0784 0.4892 -0.02650 2018 5 21 58259 0.0804 0.4898 -0.02761 2018 5 22 58260 0.0824 0.4904 -0.02880 2018 5 23 58261 0.0844 0.4909 -0.03011 2018 5 24 58262 0.0864 0.4915 -0.03147 2018 5 25 58263 0.0885 0.4920 -0.03282 2018 5 26 58264 0.0905 0.4924 -0.03408 2018 5 27 58265 0.0926 0.4929 -0.03522 2018 5 28 58266 0.0946 0.4933 -0.03621 2018 5 29 58267 0.0967 0.4936 -0.03701 2018 5 30 58268 0.0987 0.4940 -0.03762 2018 5 31 58269 0.1008 0.4943 -0.03808 2018 6 1 58270 0.1028 0.4946 -0.03845 2018 6 2 58271 0.1049 0.4948 -0.03879 2018 6 3 58272 0.1070 0.4950 -0.03913 2018 6 4 58273 0.1091 0.4952 -0.03951 2018 6 5 58274 0.1111 0.4954 -0.03996 2018 6 6 58275 0.1132 0.4955 -0.04054 2018 6 7 58276 0.1153 0.4956 -0.04129 2018 6 8 58277 0.1174 0.4957 -0.04218 2018 6 9 58278 0.1194 0.4957 -0.04319 2018 6 10 58279 0.1215 0.4957 -0.04420 2018 6 11 58280 0.1236 0.4957 -0.04517 2018 6 12 58281 0.1257 0.4957 -0.04609 2018 6 13 58282 0.1277 0.4956 -0.04688 2018 6 14 58283 0.1298 0.4955 -0.04751 2018 6 15 58284 0.1319 0.4953 -0.04804 2018 6 16 58285 0.1339 0.4951 -0.04852 2018 6 17 58286 0.1360 0.4949 -0.04904 2018 6 18 58287 0.1380 0.4947 -0.04964 2018 6 19 58288 0.1400 0.4944 -0.05029 2018 6 20 58289 0.1421 0.4941 -0.05097 2018 6 21 58290 0.1441 0.4938 -0.05164 2018 6 22 58291 0.1461 0.4934 -0.05228 2018 6 23 58292 0.1481 0.4930 -0.05284 2018 6 24 58293 0.1501 0.4926 -0.05328 2018 6 25 58294 0.1521 0.4922 -0.05354 2018 6 26 58295 0.1541 0.4917 -0.05374 2018 6 27 58296 0.1560 0.4912 -0.05388 2018 6 28 58297 0.1580 0.4907 -0.05393 2018 6 29 58298 0.1599 0.4901 -0.05391 2018 6 30 58299 0.1619 0.4895 -0.05394 2018 7 1 58300 0.1638 0.4889 -0.05402 2018 7 2 58301 0.1657 0.4882 -0.05417 2018 7 3 58302 0.1676 0.4875 -0.05443 2018 7 4 58303 0.1695 0.4868 -0.05477 2018 7 5 58304 0.1713 0.4861 -0.05519 2018 7 6 58305 0.1732 0.4853 -0.05565 2018 7 7 58306 0.1750 0.4845 -0.05615 2018 7 8 58307 0.1768 0.4837 -0.05669 2018 7 9 58308 0.1786 0.4828 -0.05722 2018 7 10 58309 0.1804 0.4820 -0.05765 2018 7 11 58310 0.1821 0.4811 -0.05800 2018 7 12 58311 0.1839 0.4801 -0.05833 2018 7 13 58312 0.1856 0.4792 -0.05866 2018 7 14 58313 0.1873 0.4782 -0.05904 2018 7 15 58314 0.1890 0.4772 -0.05950 2018 7 16 58315 0.1906 0.4762 -0.06008 2018 7 17 58316 0.1923 0.4751 -0.06074 2018 7 18 58317 0.1939 0.4740 -0.06145 2018 7 19 58318 0.1955 0.4729 -0.06214 2018 7 20 58319 0.1971 0.4718 -0.06277 2018 7 21 58320 0.1986 0.4706 -0.06327 2018 7 22 58321 0.2002 0.4694 -0.06359 2018 7 23 58322 0.2017 0.4682 -0.06379 2018 7 24 58323 0.2031 0.4670 -0.06385 2018 7 25 58324 0.2046 0.4657 -0.06380 2018 7 26 58325 0.2060 0.4645 -0.06373 2018 7 27 58326 0.2074 0.4632 -0.06372 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) 57942 -105.48 0.30 -12.40 0.02 57943 -105.44 0.30 -12.38 0.01 57944 -105.45 0.30 -12.34 0.01 57945 -105.56 0.30 -12.34 0.15 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 57942 0.055 0.119 0.145 0.020 57943 0.071 0.119 0.174 0.010 57944 0.085 0.119 0.194 0.010 57945 0.092 0.119 0.198 0.150 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).