********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 14 September 2017 Vol. XXX No. 037 ______________________________________________________________________ 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 9 8 58004 0.24092 .00009 0.34447 .00009 0.333190 0.000015 17 9 9 58005 0.24139 .00009 0.34295 .00009 0.332222 0.000014 17 9 10 58006 0.24141 .00009 0.34177 .00009 0.331249 0.000015 17 9 11 58007 0.24115 .00009 0.34063 .00009 0.330356 0.000016 17 9 12 58008 0.24055 .00009 0.33922 .00009 0.329583 0.000018 17 9 13 58009 0.23942 .00009 0.33754 .00009 0.328893 0.000020 17 9 14 58010 0.23797 .00009 0.33579 .00009 0.328299 0.000020 _______________________________________________________________________ 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 = 0.1212 + 0.1466 cos A - 0.0156 sin A - 0.0339 cos C - 0.0083 sin C y = 0.3594 - 0.0081 cos A - 0.1319 sin A - 0.0083 cos C + 0.0339 sin C UT1-UTC = 0.2947 - 0.00109 (MJD - 58018) - (UT2-UT1) where A = 2*pi*(MJD-58010)/365.25 and C = 2*pi*(MJD-58010)/435. TAI-UTC(MJD 58011) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58010)**0.80 S t = 0.00025 (MJD-58010)**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 9 15 58011 0.2367 0.3339 0.32774 2017 9 16 58012 0.2356 0.3321 0.32714 2017 9 17 58013 0.2347 0.3304 0.32643 2017 9 18 58014 0.2340 0.3288 0.32558 2017 9 19 58015 0.2333 0.3271 0.32459 2017 9 20 58016 0.2325 0.3254 0.32355 2017 9 21 58017 0.2318 0.3238 0.32250 2017 9 22 58018 0.2310 0.3222 0.32150 2017 9 23 58019 0.2302 0.3206 0.32056 2017 9 24 58020 0.2294 0.3190 0.31969 2017 9 25 58021 0.2286 0.3174 0.31891 2017 9 26 58022 0.2278 0.3157 0.31824 2017 9 27 58023 0.2270 0.3142 0.31765 2017 9 28 58024 0.2261 0.3126 0.31712 2017 9 29 58025 0.2252 0.3111 0.31657 2017 9 30 58026 0.2243 0.3096 0.31598 2017 10 1 58027 0.2232 0.3082 0.31530 2017 10 2 58028 0.2221 0.3067 0.31448 2017 10 3 58029 0.2209 0.3052 0.31350 2017 10 4 58030 0.2197 0.3038 0.31235 2017 10 5 58031 0.2185 0.3023 0.31105 2017 10 6 58032 0.2172 0.3009 0.30964 2017 10 7 58033 0.2160 0.2995 0.30821 2017 10 8 58034 0.2147 0.2981 0.30682 2017 10 9 58035 0.2134 0.2967 0.30554 2017 10 10 58036 0.2121 0.2953 0.30438 2017 10 11 58037 0.2108 0.2940 0.30333 2017 10 12 58038 0.2094 0.2927 0.30232 2017 10 13 58039 0.2080 0.2914 0.30130 2017 10 14 58040 0.2066 0.2901 0.30020 2017 10 15 58041 0.2052 0.2888 0.29898 2017 10 16 58042 0.2038 0.2876 0.29763 2017 10 17 58043 0.2023 0.2863 0.29616 2017 10 18 58044 0.2008 0.2851 0.29463 2017 10 19 58045 0.1993 0.2840 0.29309 2017 10 20 58046 0.1977 0.2828 0.29158 2017 10 21 58047 0.1961 0.2817 0.29014 2017 10 22 58048 0.1945 0.2806 0.28881 2017 10 23 58049 0.1929 0.2795 0.28759 2017 10 24 58050 0.1913 0.2784 0.28647 2017 10 25 58051 0.1896 0.2774 0.28542 2017 10 26 58052 0.1879 0.2763 0.28439 2017 10 27 58053 0.1862 0.2753 0.28335 2017 10 28 58054 0.1845 0.2744 0.28224 2017 10 29 58055 0.1828 0.2734 0.28100 2017 10 30 58056 0.1810 0.2725 0.27962 2017 10 31 58057 0.1792 0.2716 0.27807 2017 11 1 58058 0.1774 0.2707 0.27636 2017 11 2 58059 0.1756 0.2699 0.27451 2017 11 3 58060 0.1738 0.2690 0.27259 2017 11 4 58061 0.1719 0.2682 0.27068 2017 11 5 58062 0.1701 0.2675 0.26885 2017 11 6 58063 0.1682 0.2667 0.26716 2017 11 7 58064 0.1663 0.2660 0.26562 2017 11 8 58065 0.1644 0.2653 0.26419 2017 11 9 58066 0.1625 0.2647 0.26280 2017 11 10 58067 0.1606 0.2640 0.26140 2017 11 11 58068 0.1586 0.2634 0.25992 2017 11 12 58069 0.1566 0.2629 0.25837 2017 11 13 58070 0.1547 0.2623 0.25674 2017 11 14 58071 0.1527 0.2618 0.25506 2017 11 15 58072 0.1507 0.2613 0.25339 2017 11 16 58073 0.1487 0.2608 0.25176 2017 11 17 58074 0.1467 0.2604 0.25021 2017 11 18 58075 0.1447 0.2600 0.24876 2017 11 19 58076 0.1426 0.2596 0.24743 2017 11 20 58077 0.1406 0.2593 0.24622 2017 11 21 58078 0.1386 0.2590 0.24509 2017 11 22 58079 0.1365 0.2587 0.24402 2017 11 23 58080 0.1344 0.2584 0.24296 2017 11 24 58081 0.1324 0.2582 0.24188 2017 11 25 58082 0.1303 0.2580 0.24071 2017 11 26 58083 0.1282 0.2578 0.23944 2017 11 27 58084 0.1262 0.2577 0.23802 2017 11 28 58085 0.1241 0.2576 0.23646 2017 11 29 58086 0.1220 0.2575 0.23477 2017 11 30 58087 0.1199 0.2575 0.23297 2017 12 1 58088 0.1178 0.2574 0.23113 2017 12 2 58089 0.1157 0.2575 0.22934 2017 12 3 58090 0.1136 0.2575 0.22765 2017 12 4 58091 0.1115 0.2576 0.22611 2017 12 5 58092 0.1094 0.2577 0.22470 2017 12 6 58093 0.1074 0.2578 0.22335 2017 12 7 58094 0.1053 0.2580 0.22200 2017 12 8 58095 0.1032 0.2582 0.22060 2017 12 9 58096 0.1011 0.2584 0.21912 2017 12 10 58097 0.0990 0.2587 0.21757 2017 12 11 58098 0.0969 0.2590 0.21598 2017 12 12 58099 0.0949 0.2593 0.21441 2017 12 13 58100 0.0928 0.2596 0.21290 2017 12 14 58101 0.0907 0.2600 0.21149 2017 12 15 58102 0.0887 0.2604 0.21020 2017 12 16 58103 0.0866 0.2609 0.20904 2017 12 17 58104 0.0846 0.2613 0.20801 2017 12 18 58105 0.0826 0.2618 0.20708 2017 12 19 58106 0.0805 0.2624 0.20623 2017 12 20 58107 0.0785 0.2629 0.20542 2017 12 21 58108 0.0765 0.2635 0.20460 2017 12 22 58109 0.0745 0.2642 0.20373 2017 12 23 58110 0.0725 0.2648 0.20276 2017 12 24 58111 0.0706 0.2655 0.20168 2017 12 25 58112 0.0686 0.2662 0.20047 2017 12 26 58113 0.0666 0.2669 0.19914 2017 12 27 58114 0.0647 0.2677 0.19771 2017 12 28 58115 0.0628 0.2685 0.19622 2017 12 29 58116 0.0609 0.2693 0.19472 2017 12 30 58117 0.0590 0.2702 0.19329 2017 12 31 58118 0.0571 0.2710 0.19196 2018 1 1 58119 0.0552 0.2719 0.19078 2018 1 2 58120 0.0534 0.2729 0.18967 2018 1 3 58121 0.0516 0.2738 0.18858 2018 1 4 58122 0.0497 0.2748 0.18742 2018 1 5 58123 0.0479 0.2758 0.18617 2018 1 6 58124 0.0462 0.2769 0.18483 2018 1 7 58125 0.0444 0.2780 0.18343 2018 1 8 58126 0.0427 0.2790 0.18203 2018 1 9 58127 0.0409 0.2802 0.18068 2018 1 10 58128 0.0392 0.2813 0.17942 2018 1 11 58129 0.0375 0.2825 0.17827 2018 1 12 58130 0.0359 0.2837 0.17725 2018 1 13 58131 0.0342 0.2849 0.17635 2018 1 14 58132 0.0326 0.2862 0.17555 2018 1 15 58133 0.0310 0.2874 0.17482 2018 1 16 58134 0.0295 0.2887 0.17412 2018 1 17 58135 0.0279 0.2900 0.17342 2018 1 18 58136 0.0264 0.2914 0.17265 2018 1 19 58137 0.0249 0.2927 0.17179 2018 1 20 58138 0.0234 0.2941 0.17081 2018 1 21 58139 0.0219 0.2955 0.16969 2018 1 22 58140 0.0205 0.2970 0.16844 2018 1 23 58141 0.0191 0.2984 0.16709 2018 1 24 58142 0.0177 0.2999 0.16566 2018 1 25 58143 0.0164 0.3014 0.16421 2018 1 26 58144 0.0151 0.3029 0.16280 2018 1 27 58145 0.0138 0.3044 0.16145 2018 1 28 58146 0.0125 0.3060 0.16019 2018 1 29 58147 0.0113 0.3076 0.15901 2018 1 30 58148 0.0101 0.3091 0.15784 2018 1 31 58149 0.0089 0.3108 0.15661 2018 2 1 58150 0.0077 0.3124 0.15527 2018 2 2 58151 0.0066 0.3140 0.15380 2018 2 3 58152 0.0055 0.3157 0.15222 2018 2 4 58153 0.0044 0.3174 0.15059 2018 2 5 58154 0.0034 0.3191 0.14898 2018 2 6 58155 0.0024 0.3208 0.14744 2018 2 7 58156 0.0014 0.3225 0.14602 2018 2 8 58157 0.0005 0.3242 0.14474 2018 2 9 58158 -0.0004 0.3260 0.14358 2018 2 10 58159 -0.0013 0.3278 0.14252 2018 2 11 58160 -0.0021 0.3295 0.14155 2018 2 12 58161 -0.0030 0.3313 0.14062 2018 2 13 58162 -0.0037 0.3332 0.13969 2018 2 14 58163 -0.0045 0.3350 0.13870 2018 2 15 58164 -0.0052 0.3368 0.13763 2018 2 16 58165 -0.0059 0.3387 0.13643 2018 2 17 58166 -0.0065 0.3405 0.13508 2018 2 18 58167 -0.0071 0.3424 0.13360 2018 2 19 58168 -0.0077 0.3442 0.13201 2018 2 20 58169 -0.0083 0.3461 0.13035 2018 2 21 58170 -0.0088 0.3480 0.12866 2018 2 22 58171 -0.0093 0.3499 0.12702 2018 2 23 58172 -0.0097 0.3518 0.12544 2018 2 24 58173 -0.0101 0.3537 0.12395 2018 2 25 58174 -0.0105 0.3557 0.12254 2018 2 26 58175 -0.0108 0.3576 0.12117 2018 2 27 58176 -0.0111 0.3595 0.11975 2018 2 28 58177 -0.0114 0.3615 0.11824 2018 3 1 58178 -0.0116 0.3634 0.11658 2018 3 2 58179 -0.0118 0.3654 0.11477 2018 3 3 58180 -0.0120 0.3673 0.11286 2018 3 4 58181 -0.0121 0.3693 0.11092 2018 3 5 58182 -0.0122 0.3712 0.10903 2018 3 6 58183 -0.0123 0.3732 0.10723 2018 3 7 58184 -0.0123 0.3751 0.10557 2018 3 8 58185 -0.0123 0.3771 0.10405 2018 3 9 58186 -0.0122 0.3791 0.10264 2018 3 10 58187 -0.0122 0.3810 0.10134 2018 3 11 58188 -0.0120 0.3830 0.10009 2018 3 12 58189 -0.0119 0.3849 0.09885 2018 3 13 58190 -0.0117 0.3869 0.09756 2018 3 14 58191 -0.0115 0.3889 0.09619 2018 3 15 58192 -0.0112 0.3908 0.09470 2018 3 16 58193 -0.0109 0.3928 0.09304 2018 3 17 58194 -0.0106 0.3947 0.09122 2018 3 18 58195 -0.0102 0.3967 0.08925 2018 3 19 58196 -0.0098 0.3986 0.08718 2018 3 20 58197 -0.0094 0.4005 0.08507 2018 3 21 58198 -0.0089 0.4025 0.08297 2018 3 22 58199 -0.0084 0.4044 0.08097 2018 3 23 58200 -0.0079 0.4063 0.07908 2018 3 24 58201 -0.0073 0.4082 0.07731 2018 3 25 58202 -0.0067 0.4101 0.07564 2018 3 26 58203 -0.0060 0.4120 0.07402 2018 3 27 58204 -0.0053 0.4139 0.07239 2018 3 28 58205 -0.0046 0.4158 0.07068 2018 3 29 58206 -0.0039 0.4176 0.06888 2018 3 30 58207 -0.0031 0.4195 0.06700 2018 3 31 58208 -0.0023 0.4213 0.06508 2018 4 1 58209 -0.0015 0.4231 0.06321 2018 4 2 58210 -0.0006 0.4250 0.06143 2018 4 3 58211 0.0003 0.4268 0.05978 2018 4 4 58212 0.0013 0.4286 0.05828 2018 4 5 58213 0.0023 0.4304 0.05694 2018 4 6 58214 0.0033 0.4321 0.05573 2018 4 7 58215 0.0043 0.4339 0.05462 2018 4 8 58216 0.0054 0.4356 0.05356 2018 4 9 58217 0.0065 0.4373 0.05251 2018 4 10 58218 0.0076 0.4390 0.05143 2018 4 11 58219 0.0088 0.4407 0.05027 2018 4 12 58220 0.0100 0.4424 0.04900 2018 4 13 58221 0.0112 0.4441 0.04763 2018 4 14 58222 0.0124 0.4457 0.04614 2018 4 15 58223 0.0137 0.4473 0.04456 2018 4 16 58224 0.0150 0.4490 0.04295 2018 4 17 58225 0.0164 0.4505 0.04136 2018 4 18 58226 0.0177 0.4521 0.03986 2018 4 19 58227 0.0191 0.4537 0.03848 2018 4 20 58228 0.0206 0.4552 0.03720 2018 4 21 58229 0.0220 0.4567 0.03597 2018 4 22 58230 0.0235 0.4582 0.03476 2018 4 23 58231 0.0250 0.4597 0.03353 2018 4 24 58232 0.0265 0.4611 0.03218 2018 4 25 58233 0.0281 0.4625 0.03068 2018 4 26 58234 0.0296 0.4639 0.02901 2018 4 27 58235 0.0312 0.4653 0.02716 2018 4 28 58236 0.0329 0.4667 0.02525 2018 4 29 58237 0.0345 0.4680 0.02337 2018 4 30 58238 0.0362 0.4693 0.02162 2018 5 1 58239 0.0379 0.4706 0.02002 2018 5 2 58240 0.0396 0.4719 0.01860 2018 5 3 58241 0.0414 0.4731 0.01736 2018 5 4 58242 0.0431 0.4743 0.01629 2018 5 5 58243 0.0449 0.4755 0.01532 2018 5 6 58244 0.0467 0.4767 0.01442 2018 5 7 58245 0.0485 0.4778 0.01352 2018 5 8 58246 0.0504 0.4789 0.01256 2018 5 9 58247 0.0522 0.4800 0.01154 2018 5 10 58248 0.0541 0.4810 0.01044 2018 5 11 58249 0.0560 0.4821 0.00923 2018 5 12 58250 0.0579 0.4831 0.00791 2018 5 13 58251 0.0599 0.4840 0.00654 2018 5 14 58252 0.0618 0.4850 0.00516 2018 5 15 58253 0.0638 0.4859 0.00383 2018 5 16 58254 0.0658 0.4868 0.00260 2018 5 17 58255 0.0678 0.4877 0.00152 2018 5 18 58256 0.0698 0.4885 0.00056 2018 5 19 58257 0.0718 0.4893 -0.00034 2018 5 20 58258 0.0739 0.4901 -0.00126 2018 5 21 58259 0.0759 0.4908 -0.00225 2018 5 22 58260 0.0780 0.4915 -0.00334 2018 5 23 58261 0.0801 0.4922 -0.00454 2018 5 24 58262 0.0821 0.4929 -0.00580 2018 5 25 58263 0.0842 0.4935 -0.00703 2018 5 26 58264 0.0863 0.4941 -0.00817 2018 5 27 58265 0.0885 0.4946 -0.00924 2018 5 28 58266 0.0906 0.4952 -0.01018 2018 5 29 58267 0.0927 0.4957 -0.01103 2018 5 30 58268 0.0949 0.4961 -0.01176 2018 5 31 58269 0.0970 0.4966 -0.01237 2018 6 1 58270 0.0992 0.4970 -0.01288 2018 6 2 58271 0.1013 0.4974 -0.01333 2018 6 3 58272 0.1035 0.4977 -0.01378 2018 6 4 58273 0.1057 0.4980 -0.01426 2018 6 5 58274 0.1078 0.4983 -0.01486 2018 6 6 58275 0.1100 0.4986 -0.01556 2018 6 7 58276 0.1122 0.4988 -0.01637 2018 6 8 58277 0.1144 0.4990 -0.01727 2018 6 9 58278 0.1166 0.4991 -0.01827 2018 6 10 58279 0.1188 0.4993 -0.01934 2018 6 11 58280 0.1210 0.4993 -0.02034 2018 6 12 58281 0.1231 0.4994 -0.02124 2018 6 13 58282 0.1253 0.4994 -0.02202 2018 6 14 58283 0.1275 0.4994 -0.02264 2018 6 15 58284 0.1297 0.4994 -0.02313 2018 6 16 58285 0.1319 0.4993 -0.02364 2018 6 17 58286 0.1341 0.4992 -0.02417 2018 6 18 58287 0.1362 0.4991 -0.02478 2018 6 19 58288 0.1384 0.4989 -0.02550 2018 6 20 58289 0.1406 0.4988 -0.02627 2018 6 21 58290 0.1427 0.4985 -0.02706 2018 6 22 58291 0.1449 0.4983 -0.02781 2018 6 23 58292 0.1470 0.4980 -0.02846 2018 6 24 58293 0.1492 0.4977 -0.02895 2018 6 25 58294 0.1513 0.4973 -0.02927 2018 6 26 58295 0.1534 0.4969 -0.02945 2018 6 27 58296 0.1556 0.4965 -0.02951 2018 6 28 58297 0.1577 0.4961 -0.02952 2018 6 29 58298 0.1598 0.4956 -0.02951 2018 6 30 58299 0.1618 0.4951 -0.02947 2018 7 1 58300 0.1639 0.4946 -0.02941 2018 7 2 58301 0.1660 0.4940 -0.02942 2018 7 3 58302 0.1680 0.4934 -0.02959 2018 7 4 58303 0.1701 0.4928 -0.02989 2018 7 5 58304 0.1721 0.4921 -0.03033 2018 7 6 58305 0.1741 0.4915 -0.03088 2018 7 7 58306 0.1761 0.4907 -0.03147 2018 7 8 58307 0.1781 0.4900 -0.03208 2018 7 9 58308 0.1801 0.4892 -0.03268 2018 7 10 58309 0.1820 0.4884 -0.03323 2018 7 11 58310 0.1840 0.4876 -0.03372 2018 7 12 58311 0.1859 0.4868 -0.03411 2018 7 13 58312 0.1878 0.4859 -0.03452 2018 7 14 58313 0.1897 0.4850 -0.03499 2018 7 15 58314 0.1915 0.4840 -0.03556 2018 7 16 58315 0.1934 0.4831 -0.03623 2018 7 17 58316 0.1952 0.4821 -0.03698 2018 7 18 58317 0.1970 0.4810 -0.03776 2018 7 19 58318 0.1988 0.4800 -0.03852 2018 7 20 58319 0.2006 0.4789 -0.03919 2018 7 21 58320 0.2023 0.4778 -0.03971 2018 7 22 58321 0.2040 0.4767 -0.04003 2018 7 23 58322 0.2057 0.4756 -0.04017 2018 7 24 58323 0.2074 0.4744 -0.04017 2018 7 25 58324 0.2091 0.4732 -0.04001 2018 7 26 58325 0.2107 0.4720 -0.03976 2018 7 27 58326 0.2123 0.4707 -0.03948 2018 7 28 58327 0.2139 0.4695 -0.03922 2018 7 29 58328 0.2154 0.4682 -0.03905 2018 7 30 58329 0.2170 0.4668 -0.03906 2018 7 31 58330 0.2185 0.4655 -0.03928 2018 8 1 58331 0.2199 0.4642 -0.03966 2018 8 2 58332 0.2214 0.4628 -0.04020 2018 8 3 58333 0.2228 0.4614 -0.04086 2018 8 4 58334 0.2242 0.4600 -0.04154 2018 8 5 58335 0.2256 0.4585 -0.04222 2018 8 6 58336 0.2269 0.4571 -0.04286 2018 8 7 58337 0.2283 0.4556 -0.04345 2018 8 8 58338 0.2295 0.4541 -0.04397 2018 8 9 58339 0.2308 0.4526 -0.04438 2018 8 10 58340 0.2320 0.4510 -0.04478 2018 8 11 58341 0.2332 0.4495 -0.04528 2018 8 12 58342 0.2344 0.4479 -0.04594 2018 8 13 58343 0.2355 0.4463 -0.04673 2018 8 14 58344 0.2366 0.4447 -0.04762 2018 8 15 58345 0.2377 0.4431 -0.04853 2018 8 16 58346 0.2388 0.4414 -0.04937 2018 8 17 58347 0.2398 0.4398 -0.05004 2018 8 18 58348 0.2408 0.4381 -0.05051 2018 8 19 58349 0.2417 0.4364 -0.05083 2018 8 20 58350 0.2426 0.4347 -0.05107 2018 8 21 58351 0.2435 0.4330 -0.05122 2018 8 22 58352 0.2444 0.4313 -0.05136 2018 8 23 58353 0.2452 0.4296 -0.05154 2018 8 24 58354 0.2460 0.4278 -0.05174 2018 8 25 58355 0.2467 0.4261 -0.05201 2018 8 26 58356 0.2474 0.4243 -0.05244 2018 8 27 58357 0.2481 0.4225 -0.05301 2018 8 28 58358 0.2488 0.4208 -0.05371 2018 8 29 58359 0.2494 0.4190 -0.05455 2018 8 30 58360 0.2500 0.4172 -0.05548 2018 8 31 58361 0.2505 0.4153 -0.05643 2018 9 1 58362 0.2511 0.4135 -0.05734 2018 9 2 58363 0.2515 0.4117 -0.05817 2018 9 3 58364 0.2520 0.4099 -0.05893 2018 9 4 58365 0.2524 0.4080 -0.05958 2018 9 5 58366 0.2528 0.4062 -0.06016 2018 9 6 58367 0.2531 0.4043 -0.06073 2018 9 7 58368 0.2534 0.4025 -0.06143 2018 9 8 58369 0.2537 0.4006 -0.06230 2018 9 9 58370 0.2539 0.3987 -0.06338 2018 9 10 58371 0.2541 0.3969 -0.06462 2018 9 11 58372 0.2543 0.3950 -0.06594 2018 9 12 58373 0.2544 0.3931 -0.06730 2018 9 13 58374 0.2545 0.3912 -0.06862 2018 9 14 58375 0.2546 0.3894 -0.06982 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) 57988 -109.83 0.30 -12.17 0.05 57989 -110.00 0.30 -12.26 0.05 57990 -110.43 0.30 -12.24 0.05 57991 -110.89 0.30 -12.13 0.05 57992 -111.16 0.30 -12.10 0.04 57993 -111.17 0.30 -12.19 0.04 57994 -110.98 0.30 -12.30 0.01 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 57988 0.197 0.119 0.183 0.050 57989 0.188 0.119 0.168 0.050 57990 0.168 0.119 0.155 0.050 57991 0.151 0.119 0.164 0.050 57992 0.135 0.119 0.156 0.040 57993 0.122 0.119 0.145 0.040 57994 0.126 0.119 0.144 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).