********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 17 August 2017 Vol. XXX No. 033 ______________________________________________________________________ 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 8 11 57976 0.22334 .00009 0.39482 .00009 0.344170 0.000008 17 8 12 57977 0.22426 .00009 0.39308 .00009 0.343476 0.000013 17 8 13 57978 0.22490 .00009 0.39133 .00009 0.342797 0.000014 17 8 14 57979 0.22536 .00009 0.38959 .00009 0.342173 0.000010 17 8 15 57980 0.22541 .00009 0.38786 .00009 0.341658 0.000010 17 8 16 57981 0.22523 .00009 0.38595 .00009 0.341235 0.000010 17 8 17 57982 0.22532 .00009 0.38381 .00009 0.340905 0.000010 _______________________________________________________________________ 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 = 0.1154 + 0.1385 cos A + 0.0401 sin A - 0.0357 cos C - 0.0104 sin C y = 0.3573 + 0.0423 cos A - 0.1224 sin A - 0.0104 cos C + 0.0357 sin C UT1-UTC = 0.3131 - 0.00111 (MJD - 57990) - (UT2-UT1) where A = 2*pi*(MJD-57982)/365.25 and C = 2*pi*(MJD-57982)/435. TAI-UTC(MJD 57983) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-57982)**0.80 S t = 0.00025 (MJD-57982)**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 18 57983 0.2256 0.3818 0.34066 2017 8 19 57984 0.2260 0.3798 0.34046 2017 8 20 57985 0.2264 0.3780 0.34022 2017 8 21 57986 0.2268 0.3762 0.33989 2017 8 22 57987 0.2271 0.3745 0.33948 2017 8 23 57988 0.2273 0.3729 0.33901 2017 8 24 57989 0.2274 0.3713 0.33853 2017 8 25 57990 0.2275 0.3697 0.33808 2017 8 26 57991 0.2275 0.3681 0.33767 2017 8 27 57992 0.2275 0.3665 0.33729 2017 8 28 57993 0.2276 0.3648 0.33697 2017 8 29 57994 0.2277 0.3631 0.33671 2017 8 30 57995 0.2277 0.3615 0.33650 2017 8 31 57996 0.2276 0.3599 0.33634 2017 9 1 57997 0.2275 0.3582 0.33615 2017 9 2 57998 0.2273 0.3566 0.33590 2017 9 3 57999 0.2271 0.3551 0.33554 2017 9 4 58000 0.2268 0.3534 0.33504 2017 9 5 58001 0.2264 0.3518 0.33436 2017 9 6 58002 0.2260 0.3502 0.33349 2017 9 7 58003 0.2257 0.3485 0.33243 2017 9 8 58004 0.2253 0.3469 0.33121 2017 9 9 58005 0.2249 0.3453 0.32990 2017 9 10 58006 0.2244 0.3437 0.32859 2017 9 11 58007 0.2239 0.3421 0.32734 2017 9 12 58008 0.2234 0.3405 0.32619 2017 9 13 58009 0.2228 0.3390 0.32514 2017 9 14 58010 0.2222 0.3374 0.32418 2017 9 15 58011 0.2216 0.3359 0.32325 2017 9 16 58012 0.2209 0.3344 0.32227 2017 9 17 58013 0.2203 0.3328 0.32118 2017 9 18 58014 0.2196 0.3313 0.31996 2017 9 19 58015 0.2188 0.3298 0.31861 2017 9 20 58016 0.2180 0.3283 0.31718 2017 9 21 58017 0.2172 0.3268 0.31572 2017 9 22 58018 0.2164 0.3253 0.31428 2017 9 23 58019 0.2155 0.3239 0.31292 2017 9 24 58020 0.2146 0.3224 0.31166 2017 9 25 58021 0.2137 0.3210 0.31051 2017 9 26 58022 0.2127 0.3196 0.30948 2017 9 27 58023 0.2117 0.3181 0.30852 2017 9 28 58024 0.2107 0.3167 0.30763 2017 9 29 58025 0.2097 0.3153 0.30673 2017 9 30 58026 0.2086 0.3140 0.30580 2017 10 1 58027 0.2075 0.3126 0.30476 2017 10 2 58028 0.2064 0.3113 0.30359 2017 10 3 58029 0.2053 0.3099 0.30226 2017 10 4 58030 0.2041 0.3086 0.30073 2017 10 5 58031 0.2029 0.3073 0.29904 2017 10 6 58032 0.2016 0.3061 0.29723 2017 10 7 58033 0.2004 0.3048 0.29538 2017 10 8 58034 0.1991 0.3035 0.29356 2017 10 9 58035 0.1978 0.3023 0.29185 2017 10 10 58036 0.1965 0.3011 0.29027 2017 10 11 58037 0.1951 0.2999 0.28879 2017 10 12 58038 0.1937 0.2987 0.28738 2017 10 13 58039 0.1923 0.2976 0.28597 2017 10 14 58040 0.1909 0.2964 0.28450 2017 10 15 58041 0.1895 0.2953 0.28294 2017 10 16 58042 0.1880 0.2942 0.28127 2017 10 17 58043 0.1865 0.2932 0.27951 2017 10 18 58044 0.1850 0.2921 0.27770 2017 10 19 58045 0.1835 0.2911 0.27590 2017 10 20 58046 0.1819 0.2901 0.27417 2017 10 21 58047 0.1804 0.2891 0.27253 2017 10 22 58048 0.1788 0.2881 0.27101 2017 10 23 58049 0.1772 0.2872 0.26961 2017 10 24 58050 0.1755 0.2862 0.26831 2017 10 25 58051 0.1739 0.2853 0.26709 2017 10 26 58052 0.1722 0.2845 0.26590 2017 10 27 58053 0.1705 0.2836 0.26470 2017 10 28 58054 0.1688 0.2828 0.26343 2017 10 29 58055 0.1671 0.2820 0.26206 2017 10 30 58056 0.1654 0.2812 0.26055 2017 10 31 58057 0.1636 0.2804 0.25888 2017 11 1 58058 0.1618 0.2797 0.25706 2017 11 2 58059 0.1601 0.2790 0.25511 2017 11 3 58060 0.1583 0.2783 0.25309 2017 11 4 58061 0.1565 0.2777 0.25110 2017 11 5 58062 0.1546 0.2770 0.24920 2017 11 6 58063 0.1528 0.2764 0.24745 2017 11 7 58064 0.1510 0.2759 0.24584 2017 11 8 58065 0.1491 0.2753 0.24436 2017 11 9 58066 0.1472 0.2748 0.24292 2017 11 10 58067 0.1453 0.2743 0.24146 2017 11 11 58068 0.1434 0.2738 0.23995 2017 11 12 58069 0.1415 0.2734 0.23835 2017 11 13 58070 0.1396 0.2730 0.23670 2017 11 14 58071 0.1377 0.2726 0.23501 2017 11 15 58072 0.1358 0.2722 0.23334 2017 11 16 58073 0.1338 0.2719 0.23172 2017 11 17 58074 0.1319 0.2716 0.23021 2017 11 18 58075 0.1299 0.2713 0.22881 2017 11 19 58076 0.1280 0.2710 0.22754 2017 11 20 58077 0.1260 0.2708 0.22639 2017 11 21 58078 0.1241 0.2706 0.22535 2017 11 22 58079 0.1221 0.2705 0.22437 2017 11 23 58080 0.1201 0.2703 0.22342 2017 11 24 58081 0.1181 0.2702 0.22244 2017 11 25 58082 0.1161 0.2701 0.22140 2017 11 26 58083 0.1142 0.2701 0.22025 2017 11 27 58084 0.1122 0.2701 0.21896 2017 11 28 58085 0.1102 0.2701 0.21753 2017 11 29 58086 0.1082 0.2701 0.21596 2017 11 30 58087 0.1062 0.2702 0.21428 2017 12 1 58088 0.1042 0.2703 0.21256 2017 12 2 58089 0.1022 0.2704 0.21089 2017 12 3 58090 0.1002 0.2706 0.20932 2017 12 4 58091 0.0983 0.2707 0.20786 2017 12 5 58092 0.0963 0.2710 0.20652 2017 12 6 58093 0.0943 0.2712 0.20526 2017 12 7 58094 0.0923 0.2715 0.20399 2017 12 8 58095 0.0903 0.2718 0.20267 2017 12 9 58096 0.0884 0.2721 0.20128 2017 12 10 58097 0.0864 0.2724 0.19981 2017 12 11 58098 0.0845 0.2728 0.19832 2017 12 12 58099 0.0825 0.2732 0.19684 2017 12 13 58100 0.0806 0.2737 0.19541 2017 12 14 58101 0.0786 0.2742 0.19408 2017 12 15 58102 0.0767 0.2747 0.19286 2017 12 16 58103 0.0748 0.2752 0.19176 2017 12 17 58104 0.0729 0.2757 0.19079 2017 12 18 58105 0.0710 0.2763 0.18991 2017 12 19 58106 0.0691 0.2769 0.18911 2017 12 20 58107 0.0672 0.2776 0.18833 2017 12 21 58108 0.0653 0.2782 0.18755 2017 12 22 58109 0.0635 0.2789 0.18671 2017 12 23 58110 0.0616 0.2797 0.18577 2017 12 24 58111 0.0598 0.2804 0.18472 2017 12 25 58112 0.0580 0.2812 0.18353 2017 12 26 58113 0.0562 0.2820 0.18221 2017 12 27 58114 0.0544 0.2828 0.18079 2017 12 28 58115 0.0526 0.2837 0.17931 2017 12 29 58116 0.0509 0.2846 0.17782 2017 12 30 58117 0.0491 0.2855 0.17639 2017 12 31 58118 0.0474 0.2864 0.17506 2018 1 1 58119 0.0457 0.2874 0.17385 2018 1 2 58120 0.0440 0.2884 0.17271 2018 1 3 58121 0.0423 0.2894 0.17159 2018 1 4 58122 0.0407 0.2904 0.17041 2018 1 5 58123 0.0390 0.2915 0.16913 2018 1 6 58124 0.0374 0.2926 0.16776 2018 1 7 58125 0.0358 0.2937 0.16633 2018 1 8 58126 0.0342 0.2948 0.16490 2018 1 9 58127 0.0327 0.2960 0.16352 2018 1 10 58128 0.0312 0.2972 0.16224 2018 1 11 58129 0.0296 0.2984 0.16106 2018 1 12 58130 0.0281 0.2996 0.16002 2018 1 13 58131 0.0267 0.3008 0.15909 2018 1 14 58132 0.0252 0.3021 0.15827 2018 1 15 58133 0.0238 0.3034 0.15751 2018 1 16 58134 0.0224 0.3047 0.15679 2018 1 17 58135 0.0210 0.3061 0.15607 2018 1 18 58136 0.0197 0.3074 0.15529 2018 1 19 58137 0.0184 0.3088 0.15442 2018 1 20 58138 0.0171 0.3102 0.15343 2018 1 21 58139 0.0158 0.3116 0.15230 2018 1 22 58140 0.0145 0.3131 0.15105 2018 1 23 58141 0.0133 0.3145 0.14969 2018 1 24 58142 0.0121 0.3160 0.14827 2018 1 25 58143 0.0110 0.3175 0.14683 2018 1 26 58144 0.0098 0.3190 0.14541 2018 1 27 58145 0.0087 0.3205 0.14407 2018 1 28 58146 0.0076 0.3221 0.14282 2018 1 29 58147 0.0066 0.3237 0.14165 2018 1 30 58148 0.0055 0.3252 0.14049 2018 1 31 58149 0.0045 0.3268 0.13927 2018 2 1 58150 0.0036 0.3285 0.13794 2018 2 2 58151 0.0026 0.3301 0.13647 2018 2 3 58152 0.0017 0.3317 0.13490 2018 2 4 58153 0.0008 0.3334 0.13328 2018 2 5 58154 0.0000 0.3351 0.13167 2018 2 6 58155 -0.0008 0.3367 0.13014 2018 2 7 58156 -0.0016 0.3384 0.12873 2018 2 8 58157 -0.0024 0.3402 0.12744 2018 2 9 58158 -0.0031 0.3419 0.12628 2018 2 10 58159 -0.0038 0.3436 0.12523 2018 2 11 58160 -0.0044 0.3454 0.12426 2018 2 12 58161 -0.0051 0.3471 0.12333 2018 2 13 58162 -0.0057 0.3489 0.12239 2018 2 14 58163 -0.0062 0.3507 0.12141 2018 2 15 58164 -0.0067 0.3524 0.12033 2018 2 16 58165 -0.0072 0.3542 0.11914 2018 2 17 58166 -0.0077 0.3560 0.11782 2018 2 18 58167 -0.0081 0.3579 0.11637 2018 2 19 58168 -0.0085 0.3597 0.11482 2018 2 20 58169 -0.0089 0.3615 0.11322 2018 2 21 58170 -0.0092 0.3633 0.11164 2018 2 22 58171 -0.0095 0.3652 0.11011 2018 2 23 58172 -0.0098 0.3670 0.10870 2018 2 24 58173 -0.0100 0.3689 0.10741 2018 2 25 58174 -0.0102 0.3707 0.10623 2018 2 26 58175 -0.0104 0.3726 0.10511 2018 2 27 58176 -0.0105 0.3744 0.10397 2018 2 28 58177 -0.0106 0.3763 0.10274 2018 3 1 58178 -0.0106 0.3782 0.10135 2018 3 2 58179 -0.0107 0.3800 0.09981 2018 3 3 58180 -0.0107 0.3819 0.09815 2018 3 4 58181 -0.0106 0.3838 0.09644 2018 3 5 58182 -0.0105 0.3857 0.09475 2018 3 6 58183 -0.0104 0.3875 0.09313 2018 3 7 58184 -0.0103 0.3894 0.09160 2018 3 8 58185 -0.0101 0.3913 0.09017 2018 3 9 58186 -0.0099 0.3931 0.08882 2018 3 10 58187 -0.0096 0.3950 0.08756 2018 3 11 58188 -0.0093 0.3969 0.08634 2018 3 12 58189 -0.0090 0.3987 0.08514 2018 3 13 58190 -0.0086 0.4006 0.08392 2018 3 14 58191 -0.0083 0.4024 0.08267 2018 3 15 58192 -0.0078 0.4043 0.08132 2018 3 16 58193 -0.0074 0.4061 0.07987 2018 3 17 58194 -0.0069 0.4080 0.07830 2018 3 18 58195 -0.0064 0.4098 0.07662 2018 3 19 58196 -0.0058 0.4116 0.07486 2018 3 20 58197 -0.0052 0.4135 0.07307 2018 3 21 58198 -0.0046 0.4153 0.07132 2018 3 22 58199 -0.0039 0.4171 0.06964 2018 3 23 58200 -0.0032 0.4189 0.06806 2018 3 24 58201 -0.0025 0.4207 0.06657 2018 3 25 58202 -0.0018 0.4224 0.06512 2018 3 26 58203 -0.0010 0.4242 0.06366 2018 3 27 58204 -0.0002 0.4260 0.06211 2018 3 28 58205 0.0007 0.4277 0.06042 2018 3 29 58206 0.0016 0.4294 0.05860 2018 3 30 58207 0.0025 0.4312 0.05669 2018 3 31 58208 0.0034 0.4329 0.05474 2018 4 1 58209 0.0044 0.4346 0.05279 2018 4 2 58210 0.0054 0.4363 0.05089 2018 4 3 58211 0.0065 0.4379 0.04906 2018 4 4 58212 0.0075 0.4396 0.04733 2018 4 5 58213 0.0086 0.4412 0.04575 2018 4 6 58214 0.0098 0.4429 0.04431 2018 4 7 58215 0.0109 0.4445 0.04295 2018 4 8 58216 0.0121 0.4461 0.04165 2018 4 9 58217 0.0133 0.4476 0.04035 2018 4 10 58218 0.0146 0.4492 0.03897 2018 4 11 58219 0.0159 0.4507 0.03750 2018 4 12 58220 0.0172 0.4523 0.03592 2018 4 13 58221 0.0185 0.4538 0.03422 2018 4 14 58222 0.0198 0.4553 0.03236 2018 4 15 58223 0.0212 0.4567 0.03039 2018 4 16 58224 0.0226 0.4582 0.02841 2018 4 17 58225 0.0241 0.4596 0.02648 2018 4 18 58226 0.0255 0.4610 0.02463 2018 4 19 58227 0.0270 0.4624 0.02293 2018 4 20 58228 0.0285 0.4638 0.02140 2018 4 21 58229 0.0301 0.4652 0.01994 2018 4 22 58230 0.0316 0.4665 0.01854 2018 4 23 58231 0.0332 0.4678 0.01713 2018 4 24 58232 0.0348 0.4691 0.01564 2018 4 25 58233 0.0365 0.4703 0.01405 2018 4 26 58234 0.0381 0.4716 0.01235 2018 4 27 58235 0.0398 0.4728 0.01056 2018 4 28 58236 0.0415 0.4740 0.00878 2018 4 29 58237 0.0432 0.4752 0.00707 2018 4 30 58238 0.0449 0.4763 0.00549 2018 5 1 58239 0.0467 0.4774 0.00406 2018 5 2 58240 0.0485 0.4785 0.00278 2018 5 3 58241 0.0503 0.4796 0.00160 2018 5 4 58242 0.0521 0.4806 0.00050 2018 5 5 58243 0.0539 0.4816 -0.00050 2018 5 6 58244 0.0558 0.4826 -0.00141 2018 5 7 58245 0.0576 0.4836 -0.00234 2018 5 8 58246 0.0595 0.4845 -0.00337 2018 5 9 58247 0.0614 0.4854 -0.00453 2018 5 10 58248 0.0633 0.4863 -0.00583 2018 5 11 58249 0.0653 0.4872 -0.00727 2018 5 12 58250 0.0672 0.4880 -0.00880 2018 5 13 58251 0.0692 0.4888 -0.01040 2018 5 14 58252 0.0712 0.4896 -0.01204 2018 5 15 58253 0.0732 0.4903 -0.01366 2018 5 16 58254 0.0752 0.4911 -0.01519 2018 5 17 58255 0.0772 0.4917 -0.01658 2018 5 18 58256 0.0792 0.4924 -0.01789 2018 5 19 58257 0.0812 0.4930 -0.01913 2018 5 20 58258 0.0833 0.4936 -0.02034 2018 5 21 58259 0.0853 0.4942 -0.02158 2018 5 22 58260 0.0874 0.4947 -0.02287 2018 5 23 58261 0.0895 0.4952 -0.02424 2018 5 24 58262 0.0915 0.4957 -0.02567 2018 5 25 58263 0.0936 0.4962 -0.02711 2018 5 26 58264 0.0957 0.4966 -0.02847 2018 5 27 58265 0.0978 0.4970 -0.02969 2018 5 28 58266 0.0999 0.4973 -0.03072 2018 5 29 58267 0.1020 0.4977 -0.03157 2018 5 30 58268 0.1042 0.4980 -0.03221 2018 5 31 58269 0.1063 0.4982 -0.03269 2018 6 1 58270 0.1084 0.4985 -0.03302 2018 6 2 58271 0.1105 0.4987 -0.03330 2018 6 3 58272 0.1126 0.4989 -0.03358 2018 6 4 58273 0.1148 0.4990 -0.03396 2018 6 5 58274 0.1169 0.4991 -0.03452 2018 6 6 58275 0.1190 0.4992 -0.03522 2018 6 7 58276 0.1212 0.4992 -0.03608 2018 6 8 58277 0.1233 0.4993 -0.03709 2018 6 9 58278 0.1254 0.4993 -0.03819 2018 6 10 58279 0.1276 0.4992 -0.03934 2018 6 11 58280 0.1297 0.4991 -0.04049 2018 6 12 58281 0.1318 0.4990 -0.04158 2018 6 13 58282 0.1339 0.4989 -0.04255 2018 6 14 58283 0.1360 0.4987 -0.04331 2018 6 15 58284 0.1382 0.4985 -0.04392 2018 6 16 58285 0.1403 0.4983 -0.04449 2018 6 17 58286 0.1424 0.4981 -0.04509 2018 6 18 58287 0.1445 0.4978 -0.04577 2018 6 19 58288 0.1465 0.4974 -0.04652 2018 6 20 58289 0.1486 0.4971 -0.04733 2018 6 21 58290 0.1507 0.4967 -0.04814 2018 6 22 58291 0.1527 0.4963 -0.04884 2018 6 23 58292 0.1548 0.4959 -0.04940 2018 6 24 58293 0.1568 0.4954 -0.04984 2018 6 25 58294 0.1589 0.4949 -0.05016 2018 6 26 58295 0.1609 0.4944 -0.05034 2018 6 27 58296 0.1629 0.4938 -0.05044 2018 6 28 58297 0.1649 0.4932 -0.05048 2018 6 29 58298 0.1669 0.4926 -0.05045 2018 6 30 58299 0.1688 0.4919 -0.05039 2018 7 1 58300 0.1708 0.4913 -0.05041 2018 7 2 58301 0.1727 0.4906 -0.05051 2018 7 3 58302 0.1747 0.4898 -0.05071 2018 7 4 58303 0.1766 0.4891 -0.05104 2018 7 5 58304 0.1785 0.4883 -0.05149 2018 7 6 58305 0.1804 0.4874 -0.05201 2018 7 7 58306 0.1822 0.4866 -0.05256 2018 7 8 58307 0.1841 0.4857 -0.05311 2018 7 9 58308 0.1859 0.4848 -0.05362 2018 7 10 58309 0.1877 0.4839 -0.05401 2018 7 11 58310 0.1895 0.4829 -0.05424 2018 7 12 58311 0.1913 0.4820 -0.05437 2018 7 13 58312 0.1930 0.4809 -0.05449 2018 7 14 58313 0.1947 0.4799 -0.05466 2018 7 15 58314 0.1965 0.4789 -0.05495 2018 7 16 58315 0.1981 0.4778 -0.05538 2018 7 17 58316 0.1998 0.4767 -0.05590 2018 7 18 58317 0.2015 0.4755 -0.05651 2018 7 19 58318 0.2031 0.4744 -0.05714 2018 7 20 58319 0.2047 0.4732 -0.05771 2018 7 21 58320 0.2062 0.4720 -0.05818 2018 7 22 58321 0.2078 0.4707 -0.05847 2018 7 23 58322 0.2093 0.4695 -0.05858 2018 7 24 58323 0.2108 0.4682 -0.05859 2018 7 25 58324 0.2123 0.4669 -0.05852 2018 7 26 58325 0.2137 0.4656 -0.05837 2018 7 27 58326 0.2152 0.4642 -0.05821 2018 7 28 58327 0.2166 0.4629 -0.05807 2018 7 29 58328 0.2179 0.4615 -0.05800 2018 7 30 58329 0.2193 0.4601 -0.05802 2018 7 31 58330 0.2206 0.4587 -0.05813 2018 8 1 58331 0.2219 0.4572 -0.05831 2018 8 2 58332 0.2231 0.4557 -0.05858 2018 8 3 58333 0.2244 0.4543 -0.05894 2018 8 4 58334 0.2256 0.4528 -0.05937 2018 8 5 58335 0.2267 0.4512 -0.05979 2018 8 6 58336 0.2279 0.4497 -0.06013 2018 8 7 58337 0.2290 0.4481 -0.06048 2018 8 8 58338 0.2301 0.4466 -0.06082 2018 8 9 58339 0.2311 0.4450 -0.06114 2018 8 10 58340 0.2322 0.4434 -0.06149 2018 8 11 58341 0.2331 0.4418 -0.06201 2018 8 12 58342 0.2341 0.4401 -0.06271 2018 8 13 58343 0.2350 0.4385 -0.06358 2018 8 14 58344 0.2359 0.4368 -0.06456 2018 8 15 58345 0.2368 0.4351 -0.06555 2018 8 16 58346 0.2376 0.4334 -0.06643 2018 8 17 58347 0.2384 0.4317 -0.06715 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) 57956 -108.30 0.30 -12.63 0.03 57957 -108.11 0.30 -12.43 0.02 57958 -107.73 0.30 -12.20 0.02 57959 -107.35 0.30 -12.17 0.15 57960 -107.22 0.11 -12.28 0.01 57961 -107.54 0.11 -12.34 0.01 57962 -108.16 0.11 -12.24 0.01 57963 -108.66 0.11 -12.12 0.01 57964 -108.81 0.11 -12.13 0.01 57965 -108.80 0.11 -12.27 0.01 57966 -108.88 0.30 -12.38 0.15 57967 -109.08 0.30 -12.37 0.15 57968 -109.27 0.30 -12.29 0.15 57969 -109.42 0.30 -12.25 0.15 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 57956 0.068 0.119 0.209 0.030 57957 0.065 0.119 0.221 0.020 57958 0.074 0.119 0.244 0.020 57959 0.084 0.119 0.261 0.150 57960 0.104 0.044 0.294 0.010 57961 0.117 0.044 0.322 0.010 57962 0.116 0.044 0.356 0.010 57963 0.109 0.044 0.364 0.010 57964 0.105 0.044 0.342 0.010 57965 0.092 0.044 0.291 0.010 57966 0.074 0.119 0.250 0.150 57967 0.062 0.119 0.225 0.150 57968 0.063 0.119 0.206 0.150 57969 0.061 0.119 0.188 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).