********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 21 September 2017 Vol. XXX No. 038 ______________________________________________________________________ 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. * * * * As of Bulletin A Vol. XXX, No. 038, 21 Sep 2017, we have * * incorporated the new USNO VLBI solutions -- usno2017b.eops and * * usno2017b.eopi. The effect appears to be less than 0.1 mas in * * polar motion and 10 us in UT1-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 15 58011 0.23698 .00009 0.33443 .00009 0.327707 0.000014 17 9 16 58012 0.23615 .00009 0.33307 .00009 0.327107 0.000013 17 9 17 58013 0.23547 .00009 0.33155 .00009 0.326347 0.000013 17 9 18 58014 0.23492 .00009 0.32996 .00009 0.325432 0.000010 17 9 19 58015 0.23429 .00009 0.32830 .00009 0.324382 0.000008 17 9 20 58016 0.23344 .00009 0.32649 .00009 0.323253 0.000007 17 9 21 58017 0.23236 .00009 0.32458 .00009 0.322128 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 = 0.1184 + 0.1427 cos A - 0.0296 sin A - 0.0316 cos C - 0.0071 sin C y = 0.3587 - 0.0207 cos A - 0.1284 sin A - 0.0071 cos C + 0.0316 sin C UT1-UTC = 0.2893 - 0.00109 (MJD - 58025) - (UT2-UT1) where A = 2*pi*(MJD-58017)/365.25 and C = 2*pi*(MJD-58017)/435. TAI-UTC(MJD 58018) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58017)**0.80 S t = 0.00025 (MJD-58017)**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 22 58018 0.2314 0.3227 0.32103 2017 9 23 58019 0.2303 0.3208 0.32000 2017 9 24 58020 0.2294 0.3190 0.31909 2017 9 25 58021 0.2286 0.3172 0.31832 2017 9 26 58022 0.2278 0.3155 0.31767 2017 9 27 58023 0.2270 0.3139 0.31714 2017 9 28 58024 0.2262 0.3124 0.31665 2017 9 29 58025 0.2253 0.3108 0.31617 2017 9 30 58026 0.2243 0.3093 0.31564 2017 10 1 58027 0.2233 0.3078 0.31501 2017 10 2 58028 0.2221 0.3063 0.31421 2017 10 3 58029 0.2210 0.3049 0.31322 2017 10 4 58030 0.2198 0.3034 0.31204 2017 10 5 58031 0.2186 0.3020 0.31069 2017 10 6 58032 0.2174 0.3006 0.30923 2017 10 7 58033 0.2162 0.2992 0.30774 2017 10 8 58034 0.2150 0.2978 0.30632 2017 10 9 58035 0.2137 0.2964 0.30501 2017 10 10 58036 0.2124 0.2950 0.30383 2017 10 11 58037 0.2110 0.2937 0.30276 2017 10 12 58038 0.2097 0.2924 0.30177 2017 10 13 58039 0.2083 0.2910 0.30078 2017 10 14 58040 0.2069 0.2897 0.29973 2017 10 15 58041 0.2055 0.2885 0.29859 2017 10 16 58042 0.2040 0.2872 0.29735 2017 10 17 58043 0.2026 0.2860 0.29603 2017 10 18 58044 0.2011 0.2848 0.29466 2017 10 19 58045 0.1996 0.2836 0.29330 2017 10 20 58046 0.1981 0.2824 0.29199 2017 10 21 58047 0.1965 0.2813 0.29077 2017 10 22 58048 0.1949 0.2802 0.28966 2017 10 23 58049 0.1933 0.2791 0.28865 2017 10 24 58050 0.1917 0.2781 0.28772 2017 10 25 58051 0.1900 0.2770 0.28685 2017 10 26 58052 0.1884 0.2760 0.28599 2017 10 27 58053 0.1867 0.2750 0.28509 2017 10 28 58054 0.1850 0.2741 0.28411 2017 10 29 58055 0.1833 0.2731 0.28301 2017 10 30 58056 0.1815 0.2722 0.28175 2017 10 31 58057 0.1798 0.2713 0.28031 2017 11 1 58058 0.1780 0.2704 0.27870 2017 11 2 58059 0.1762 0.2696 0.27694 2017 11 3 58060 0.1744 0.2688 0.27511 2017 11 4 58061 0.1726 0.2680 0.27328 2017 11 5 58062 0.1707 0.2672 0.27153 2017 11 6 58063 0.1689 0.2665 0.26992 2017 11 7 58064 0.1670 0.2658 0.26844 2017 11 8 58065 0.1651 0.2651 0.26705 2017 11 9 58066 0.1632 0.2644 0.26570 2017 11 10 58067 0.1613 0.2638 0.26431 2017 11 11 58068 0.1594 0.2632 0.26285 2017 11 12 58069 0.1574 0.2626 0.26131 2017 11 13 58070 0.1555 0.2621 0.25970 2017 11 14 58071 0.1535 0.2616 0.25804 2017 11 15 58072 0.1516 0.2611 0.25640 2017 11 16 58073 0.1496 0.2606 0.25480 2017 11 17 58074 0.1476 0.2602 0.25330 2017 11 18 58075 0.1456 0.2598 0.25192 2017 11 19 58076 0.1436 0.2594 0.25066 2017 11 20 58077 0.1416 0.2591 0.24952 2017 11 21 58078 0.1395 0.2588 0.24848 2017 11 22 58079 0.1375 0.2585 0.24750 2017 11 23 58080 0.1355 0.2583 0.24653 2017 11 24 58081 0.1334 0.2580 0.24552 2017 11 25 58082 0.1314 0.2578 0.24443 2017 11 26 58083 0.1293 0.2577 0.24323 2017 11 27 58084 0.1273 0.2575 0.24188 2017 11 28 58085 0.1252 0.2574 0.24037 2017 11 29 58086 0.1232 0.2574 0.23871 2017 11 30 58087 0.1211 0.2573 0.23695 2017 12 1 58088 0.1190 0.2573 0.23515 2017 12 2 58089 0.1170 0.2573 0.23338 2017 12 3 58090 0.1149 0.2574 0.23171 2017 12 4 58091 0.1128 0.2574 0.23019 2017 12 5 58092 0.1108 0.2576 0.22878 2017 12 6 58093 0.1087 0.2577 0.22745 2017 12 7 58094 0.1066 0.2579 0.22611 2017 12 8 58095 0.1046 0.2581 0.22471 2017 12 9 58096 0.1025 0.2583 0.22324 2017 12 10 58097 0.1004 0.2586 0.22170 2017 12 11 58098 0.0984 0.2588 0.22013 2017 12 12 58099 0.0963 0.2592 0.21857 2017 12 13 58100 0.0943 0.2595 0.21708 2017 12 14 58101 0.0923 0.2599 0.21567 2017 12 15 58102 0.0902 0.2603 0.21439 2017 12 16 58103 0.0882 0.2607 0.21322 2017 12 17 58104 0.0862 0.2612 0.21218 2017 12 18 58105 0.0842 0.2617 0.21123 2017 12 19 58106 0.0822 0.2622 0.21035 2017 12 20 58107 0.0802 0.2628 0.20950 2017 12 21 58108 0.0782 0.2634 0.20864 2017 12 22 58109 0.0762 0.2640 0.20772 2017 12 23 58110 0.0742 0.2646 0.20670 2017 12 24 58111 0.0723 0.2653 0.20557 2017 12 25 58112 0.0703 0.2660 0.20431 2017 12 26 58113 0.0684 0.2668 0.20293 2017 12 27 58114 0.0665 0.2675 0.20145 2017 12 28 58115 0.0646 0.2683 0.19991 2017 12 29 58116 0.0627 0.2691 0.19837 2017 12 30 58117 0.0608 0.2700 0.19690 2017 12 31 58118 0.0590 0.2708 0.19553 2018 1 1 58119 0.0571 0.2717 0.19429 2018 1 2 58120 0.0553 0.2727 0.19312 2018 1 3 58121 0.0535 0.2736 0.19197 2018 1 4 58122 0.0517 0.2746 0.19076 2018 1 5 58123 0.0499 0.2756 0.18947 2018 1 6 58124 0.0482 0.2767 0.18808 2018 1 7 58125 0.0464 0.2777 0.18664 2018 1 8 58126 0.0447 0.2788 0.18524 2018 1 9 58127 0.0430 0.2799 0.18389 2018 1 10 58128 0.0413 0.2811 0.18263 2018 1 11 58129 0.0396 0.2822 0.18149 2018 1 12 58130 0.0380 0.2834 0.18047 2018 1 13 58131 0.0364 0.2846 0.17957 2018 1 14 58132 0.0348 0.2859 0.17877 2018 1 15 58133 0.0332 0.2871 0.17804 2018 1 16 58134 0.0316 0.2884 0.17734 2018 1 17 58135 0.0301 0.2897 0.17664 2018 1 18 58136 0.0286 0.2911 0.17588 2018 1 19 58137 0.0271 0.2924 0.17503 2018 1 20 58138 0.0256 0.2938 0.17406 2018 1 21 58139 0.0242 0.2952 0.17296 2018 1 22 58140 0.0228 0.2966 0.17173 2018 1 23 58141 0.0214 0.2980 0.17039 2018 1 24 58142 0.0200 0.2995 0.16898 2018 1 25 58143 0.0187 0.3010 0.16756 2018 1 26 58144 0.0174 0.3025 0.16616 2018 1 27 58145 0.0161 0.3040 0.16484 2018 1 28 58146 0.0149 0.3056 0.16361 2018 1 29 58147 0.0136 0.3071 0.16245 2018 1 30 58148 0.0125 0.3087 0.16130 2018 1 31 58149 0.0113 0.3103 0.16010 2018 2 1 58150 0.0101 0.3119 0.15878 2018 2 2 58151 0.0090 0.3135 0.15733 2018 2 3 58152 0.0079 0.3152 0.15576 2018 2 4 58153 0.0069 0.3168 0.15415 2018 2 5 58154 0.0059 0.3185 0.15256 2018 2 6 58155 0.0049 0.3202 0.15104 2018 2 7 58156 0.0039 0.3219 0.14963 2018 2 8 58157 0.0030 0.3237 0.14836 2018 2 9 58158 0.0021 0.3254 0.14721 2018 2 10 58159 0.0012 0.3271 0.14617 2018 2 11 58160 0.0004 0.3289 0.14521 2018 2 12 58161 -0.0004 0.3307 0.14428 2018 2 13 58162 -0.0012 0.3325 0.14335 2018 2 14 58163 -0.0019 0.3343 0.14237 2018 2 15 58164 -0.0026 0.3361 0.14130 2018 2 16 58165 -0.0033 0.3379 0.14010 2018 2 17 58166 -0.0039 0.3398 0.13876 2018 2 18 58167 -0.0045 0.3416 0.13728 2018 2 19 58168 -0.0051 0.3435 0.13569 2018 2 20 58169 -0.0057 0.3453 0.13403 2018 2 21 58170 -0.0062 0.3472 0.13234 2018 2 22 58171 -0.0066 0.3491 0.13069 2018 2 23 58172 -0.0071 0.3510 0.12911 2018 2 24 58173 -0.0075 0.3529 0.12762 2018 2 25 58174 -0.0079 0.3548 0.12621 2018 2 26 58175 -0.0082 0.3567 0.12483 2018 2 27 58176 -0.0085 0.3586 0.12342 2018 2 28 58177 -0.0088 0.3605 0.12190 2018 3 1 58178 -0.0090 0.3624 0.12024 2018 3 2 58179 -0.0092 0.3644 0.11843 2018 3 3 58180 -0.0093 0.3663 0.11653 2018 3 4 58181 -0.0095 0.3682 0.11459 2018 3 5 58182 -0.0096 0.3702 0.11270 2018 3 6 58183 -0.0096 0.3721 0.11092 2018 3 7 58184 -0.0096 0.3741 0.10926 2018 3 8 58185 -0.0096 0.3760 0.10775 2018 3 9 58186 -0.0096 0.3779 0.10637 2018 3 10 58187 -0.0095 0.3799 0.10509 2018 3 11 58188 -0.0094 0.3818 0.10387 2018 3 12 58189 -0.0092 0.3838 0.10266 2018 3 13 58190 -0.0090 0.3857 0.10142 2018 3 14 58191 -0.0088 0.3876 0.10009 2018 3 15 58192 -0.0086 0.3896 0.09865 2018 3 16 58193 -0.0083 0.3915 0.09706 2018 3 17 58194 -0.0079 0.3934 0.09532 2018 3 18 58195 -0.0076 0.3954 0.09344 2018 3 19 58196 -0.0072 0.3973 0.09146 2018 3 20 58197 -0.0067 0.3992 0.08945 2018 3 21 58198 -0.0063 0.4011 0.08746 2018 3 22 58199 -0.0058 0.4030 0.08555 2018 3 23 58200 -0.0052 0.4049 0.08373 2018 3 24 58201 -0.0047 0.4068 0.08199 2018 3 25 58202 -0.0041 0.4086 0.08029 2018 3 26 58203 -0.0034 0.4105 0.07856 2018 3 27 58204 -0.0028 0.4124 0.07675 2018 3 28 58205 -0.0021 0.4142 0.07479 2018 3 29 58206 -0.0013 0.4161 0.07267 2018 3 30 58207 -0.0005 0.4179 0.07043 2018 3 31 58208 0.0003 0.4197 0.06813 2018 4 1 58209 0.0011 0.4215 0.06586 2018 4 2 58210 0.0020 0.4233 0.06372 2018 4 3 58211 0.0029 0.4251 0.06175 2018 4 4 58212 0.0038 0.4269 0.05998 2018 4 5 58213 0.0048 0.4287 0.05841 2018 4 6 58214 0.0058 0.4304 0.05701 2018 4 7 58215 0.0068 0.4321 0.05576 2018 4 8 58216 0.0078 0.4338 0.05460 2018 4 9 58217 0.0089 0.4356 0.05347 2018 4 10 58218 0.0101 0.4372 0.05232 2018 4 11 58219 0.0112 0.4389 0.05110 2018 4 12 58220 0.0124 0.4406 0.04975 2018 4 13 58221 0.0136 0.4422 0.04827 2018 4 14 58222 0.0148 0.4438 0.04666 2018 4 15 58223 0.0161 0.4454 0.04495 2018 4 16 58224 0.0174 0.4470 0.04319 2018 4 17 58225 0.0187 0.4486 0.04145 2018 4 18 58226 0.0201 0.4501 0.03981 2018 4 19 58227 0.0215 0.4517 0.03830 2018 4 20 58228 0.0229 0.4532 0.03693 2018 4 21 58229 0.0243 0.4547 0.03567 2018 4 22 58230 0.0258 0.4561 0.03446 2018 4 23 58231 0.0272 0.4576 0.03325 2018 4 24 58232 0.0288 0.4590 0.03196 2018 4 25 58233 0.0303 0.4604 0.03060 2018 4 26 58234 0.0319 0.4618 0.02915 2018 4 27 58235 0.0334 0.4631 0.02766 2018 4 28 58236 0.0351 0.4645 0.02619 2018 4 29 58237 0.0367 0.4658 0.02477 2018 4 30 58238 0.0383 0.4671 0.02346 2018 5 1 58239 0.0400 0.4684 0.02232 2018 5 2 58240 0.0417 0.4696 0.02135 2018 5 3 58241 0.0434 0.4708 0.02049 2018 5 4 58242 0.0452 0.4720 0.01971 2018 5 5 58243 0.0470 0.4732 0.01893 2018 5 6 58244 0.0487 0.4743 0.01820 2018 5 7 58245 0.0505 0.4754 0.01744 2018 5 8 58246 0.0524 0.4765 0.01658 2018 5 9 58247 0.0542 0.4776 0.01559 2018 5 10 58248 0.0561 0.4786 0.01441 2018 5 11 58249 0.0580 0.4796 0.01300 2018 5 12 58250 0.0599 0.4806 0.01142 2018 5 13 58251 0.0618 0.4816 0.00974 2018 5 14 58252 0.0637 0.4825 0.00806 2018 5 15 58253 0.0656 0.4834 0.00645 2018 5 16 58254 0.0676 0.4843 0.00498 2018 5 17 58255 0.0696 0.4851 0.00369 2018 5 18 58256 0.0716 0.4859 0.00259 2018 5 19 58257 0.0736 0.4867 0.00159 2018 5 20 58258 0.0756 0.4875 0.00062 2018 5 21 58259 0.0776 0.4882 -0.00038 2018 5 22 58260 0.0797 0.4889 -0.00146 2018 5 23 58261 0.0817 0.4896 -0.00260 2018 5 24 58262 0.0838 0.4902 -0.00376 2018 5 25 58263 0.0858 0.4908 -0.00491 2018 5 26 58264 0.0879 0.4914 -0.00599 2018 5 27 58265 0.0900 0.4919 -0.00696 2018 5 28 58266 0.0921 0.4925 -0.00778 2018 5 29 58267 0.0942 0.4930 -0.00846 2018 5 30 58268 0.0964 0.4934 -0.00900 2018 5 31 58269 0.0985 0.4938 -0.00942 2018 6 1 58270 0.1006 0.4942 -0.00975 2018 6 2 58271 0.1027 0.4946 -0.01004 2018 6 3 58272 0.1049 0.4949 -0.01036 2018 6 4 58273 0.1070 0.4952 -0.01073 2018 6 5 58274 0.1092 0.4955 -0.01120 2018 6 6 58275 0.1113 0.4957 -0.01180 2018 6 7 58276 0.1135 0.4960 -0.01251 2018 6 8 58277 0.1157 0.4961 -0.01329 2018 6 9 58278 0.1178 0.4963 -0.01412 2018 6 10 58279 0.1200 0.4964 -0.01503 2018 6 11 58280 0.1221 0.4965 -0.01593 2018 6 12 58281 0.1243 0.4965 -0.01683 2018 6 13 58282 0.1265 0.4965 -0.01763 2018 6 14 58283 0.1286 0.4965 -0.01830 2018 6 15 58284 0.1308 0.4965 -0.01887 2018 6 16 58285 0.1329 0.4964 -0.01942 2018 6 17 58286 0.1351 0.4963 -0.02001 2018 6 18 58287 0.1372 0.4962 -0.02068 2018 6 19 58288 0.1394 0.4960 -0.02149 2018 6 20 58289 0.1415 0.4958 -0.02238 2018 6 21 58290 0.1437 0.4956 -0.02325 2018 6 22 58291 0.1458 0.4953 -0.02407 2018 6 23 58292 0.1479 0.4950 -0.02481 2018 6 24 58293 0.1500 0.4947 -0.02542 2018 6 25 58294 0.1521 0.4944 -0.02583 2018 6 26 58295 0.1542 0.4940 -0.02608 2018 6 27 58296 0.1563 0.4936 -0.02620 2018 6 28 58297 0.1584 0.4931 -0.02620 2018 6 29 58298 0.1605 0.4926 -0.02613 2018 6 30 58299 0.1625 0.4921 -0.02607 2018 7 1 58300 0.1646 0.4916 -0.02603 2018 7 2 58301 0.1666 0.4910 -0.02605 2018 7 3 58302 0.1687 0.4904 -0.02618 2018 7 4 58303 0.1707 0.4898 -0.02641 2018 7 5 58304 0.1727 0.4891 -0.02676 2018 7 6 58305 0.1747 0.4885 -0.02722 2018 7 7 58306 0.1766 0.4877 -0.02773 2018 7 8 58307 0.1786 0.4870 -0.02824 2018 7 9 58308 0.1806 0.4862 -0.02870 2018 7 10 58309 0.1825 0.4854 -0.02908 2018 7 11 58310 0.1844 0.4846 -0.02936 2018 7 12 58311 0.1863 0.4838 -0.02959 2018 7 13 58312 0.1882 0.4829 -0.02983 2018 7 14 58313 0.1900 0.4820 -0.03010 2018 7 15 58314 0.1919 0.4810 -0.03043 2018 7 16 58315 0.1937 0.4801 -0.03088 2018 7 17 58316 0.1955 0.4791 -0.03150 2018 7 18 58317 0.1973 0.4781 -0.03218 2018 7 19 58318 0.1990 0.4770 -0.03287 2018 7 20 58319 0.2008 0.4760 -0.03348 2018 7 21 58320 0.2025 0.4749 -0.03394 2018 7 22 58321 0.2042 0.4737 -0.03425 2018 7 23 58322 0.2059 0.4726 -0.03443 2018 7 24 58323 0.2075 0.4714 -0.03454 2018 7 25 58324 0.2092 0.4702 -0.03460 2018 7 26 58325 0.2108 0.4690 -0.03460 2018 7 27 58326 0.2124 0.4678 -0.03465 2018 7 28 58327 0.2139 0.4665 -0.03475 2018 7 29 58328 0.2155 0.4653 -0.03492 2018 7 30 58329 0.2170 0.4640 -0.03516 2018 7 31 58330 0.2185 0.4626 -0.03550 2018 8 1 58331 0.2199 0.4613 -0.03594 2018 8 2 58332 0.2214 0.4599 -0.03650 2018 8 3 58333 0.2228 0.4585 -0.03713 2018 8 4 58334 0.2241 0.4571 -0.03777 2018 8 5 58335 0.2255 0.4557 -0.03836 2018 8 6 58336 0.2268 0.4542 -0.03885 2018 8 7 58337 0.2281 0.4528 -0.03924 2018 8 8 58338 0.2294 0.4513 -0.03949 2018 8 9 58339 0.2306 0.4498 -0.03969 2018 8 10 58340 0.2318 0.4482 -0.03988 2018 8 11 58341 0.2330 0.4467 -0.04017 2018 8 12 58342 0.2342 0.4451 -0.04065 2018 8 13 58343 0.2353 0.4436 -0.04136 2018 8 14 58344 0.2364 0.4420 -0.04226 2018 8 15 58345 0.2374 0.4404 -0.04324 2018 8 16 58346 0.2385 0.4387 -0.04421 2018 8 17 58347 0.2395 0.4371 -0.04509 2018 8 18 58348 0.2404 0.4355 -0.04583 2018 8 19 58349 0.2414 0.4338 -0.04642 2018 8 20 58350 0.2423 0.4321 -0.04690 2018 8 21 58351 0.2431 0.4304 -0.04730 2018 8 22 58352 0.2440 0.4287 -0.04765 2018 8 23 58353 0.2448 0.4270 -0.04793 2018 8 24 58354 0.2456 0.4253 -0.04821 2018 8 25 58355 0.2463 0.4235 -0.04854 2018 8 26 58356 0.2470 0.4218 -0.04898 2018 8 27 58357 0.2477 0.4200 -0.04953 2018 8 28 58358 0.2483 0.4183 -0.05020 2018 8 29 58359 0.2489 0.4165 -0.05098 2018 8 30 58360 0.2495 0.4147 -0.05183 2018 8 31 58361 0.2501 0.4129 -0.05266 2018 9 1 58362 0.2506 0.4111 -0.05345 2018 9 2 58363 0.2510 0.4093 -0.05419 2018 9 3 58364 0.2515 0.4075 -0.05490 2018 9 4 58365 0.2519 0.4057 -0.05554 2018 9 5 58366 0.2523 0.4038 -0.05620 2018 9 6 58367 0.2526 0.4020 -0.05692 2018 9 7 58368 0.2529 0.4002 -0.05772 2018 9 8 58369 0.2532 0.3983 -0.05866 2018 9 9 58370 0.2534 0.3965 -0.05985 2018 9 10 58371 0.2536 0.3946 -0.06120 2018 9 11 58372 0.2538 0.3928 -0.06265 2018 9 12 58373 0.2539 0.3909 -0.06412 2018 9 13 58374 0.2540 0.3891 -0.06550 2018 9 14 58375 0.2540 0.3872 -0.06672 2018 9 15 58376 0.2541 0.3854 -0.06774 2018 9 16 58377 0.2541 0.3835 -0.06859 2018 9 17 58378 0.2540 0.3817 -0.06930 2018 9 18 58379 0.2539 0.3798 -0.06992 2018 9 19 58380 0.2538 0.3780 -0.07047 2018 9 20 58381 0.2537 0.3761 -0.07103 2018 9 21 58382 0.2535 0.3743 -0.07169 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) 57995 -110.85 0.30 -12.32 0.03 57996 -110.76 0.30 -12.20 0.03 57997 -110.86 0.30 -12.10 0.03 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 57995 0.106 0.119 0.145 0.030 57996 0.114 0.119 0.186 0.030 57997 0.110 0.119 0.216 0.030 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).