********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 31 August 2017 Vol. XXX No. 035 ______________________________________________________________________ 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 25 57990 0.23189 .00009 0.36971 .00009 0.337914 0.000022 17 8 26 57991 0.23289 .00009 0.36787 .00009 0.337411 0.000022 17 8 27 57992 0.23369 .00009 0.36617 .00009 0.337025 0.000024 17 8 28 57993 0.23427 .00009 0.36449 .00009 0.336772 0.000025 17 8 29 57994 0.23479 .00009 0.36294 .00009 0.336612 0.000025 17 8 30 57995 0.23516 .00009 0.36135 .00009 0.336502 0.000024 17 8 31 57996 0.23541 .00009 0.35945 .00009 0.336427 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 = 0.1196 + 0.1472 cos A + 0.0110 sin A - 0.0372 cos C - 0.0085 sin C y = 0.3593 + 0.0161 cos A - 0.1320 sin A - 0.0085 cos C + 0.0372 sin C UT1-UTC = 0.3043 - 0.00110 (MJD - 58004) - (UT2-UT1) where A = 2*pi*(MJD-57996)/365.25 and C = 2*pi*(MJD-57996)/435. TAI-UTC(MJD 57997) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-57996)**0.80 S t = 0.00025 (MJD-57996)**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 1 57997 0.2357 0.3575 0.33632 2017 9 2 57998 0.2358 0.3556 0.33620 2017 9 3 57999 0.2358 0.3537 0.33603 2017 9 4 58000 0.2357 0.3519 0.33579 2017 9 5 58001 0.2356 0.3502 0.33541 2017 9 6 58002 0.2354 0.3484 0.33487 2017 9 7 58003 0.2352 0.3467 0.33418 2017 9 8 58004 0.2350 0.3450 0.33336 2017 9 9 58005 0.2347 0.3433 0.33247 2017 9 10 58006 0.2344 0.3417 0.33156 2017 9 11 58007 0.2340 0.3400 0.33069 2017 9 12 58008 0.2336 0.3383 0.32990 2017 9 13 58009 0.2332 0.3366 0.32921 2017 9 14 58010 0.2327 0.3349 0.32862 2017 9 15 58011 0.2322 0.3332 0.32807 2017 9 16 58012 0.2317 0.3316 0.32748 2017 9 17 58013 0.2312 0.3300 0.32679 2017 9 18 58014 0.2306 0.3283 0.32598 2017 9 19 58015 0.2299 0.3267 0.32502 2017 9 20 58016 0.2292 0.3251 0.32397 2017 9 21 58017 0.2285 0.3234 0.32287 2017 9 22 58018 0.2277 0.3218 0.32176 2017 9 23 58019 0.2269 0.3202 0.32069 2017 9 24 58020 0.2260 0.3187 0.31969 2017 9 25 58021 0.2252 0.3171 0.31877 2017 9 26 58022 0.2243 0.3155 0.31791 2017 9 27 58023 0.2233 0.3140 0.31711 2017 9 28 58024 0.2223 0.3125 0.31634 2017 9 29 58025 0.2213 0.3109 0.31554 2017 9 30 58026 0.2203 0.3094 0.31467 2017 10 1 58027 0.2192 0.3080 0.31370 2017 10 2 58028 0.2181 0.3065 0.31260 2017 10 3 58029 0.2170 0.3050 0.31132 2017 10 4 58030 0.2158 0.3036 0.30987 2017 10 5 58031 0.2147 0.3022 0.30827 2017 10 6 58032 0.2134 0.3007 0.30655 2017 10 7 58033 0.2122 0.2994 0.30479 2017 10 8 58034 0.2109 0.2980 0.30306 2017 10 9 58035 0.2096 0.2966 0.30143 2017 10 10 58036 0.2083 0.2953 0.29992 2017 10 11 58037 0.2069 0.2939 0.29853 2017 10 12 58038 0.2056 0.2926 0.29720 2017 10 13 58039 0.2041 0.2914 0.29586 2017 10 14 58040 0.2027 0.2901 0.29448 2017 10 15 58041 0.2013 0.2888 0.29300 2017 10 16 58042 0.1998 0.2876 0.29142 2017 10 17 58043 0.1983 0.2864 0.28975 2017 10 18 58044 0.1967 0.2852 0.28804 2017 10 19 58045 0.1952 0.2841 0.28635 2017 10 20 58046 0.1936 0.2829 0.28471 2017 10 21 58047 0.1920 0.2818 0.28318 2017 10 22 58048 0.1904 0.2807 0.28175 2017 10 23 58049 0.1887 0.2796 0.28043 2017 10 24 58050 0.1871 0.2786 0.27921 2017 10 25 58051 0.1854 0.2775 0.27806 2017 10 26 58052 0.1837 0.2765 0.27693 2017 10 27 58053 0.1819 0.2756 0.27577 2017 10 28 58054 0.1802 0.2746 0.27454 2017 10 29 58055 0.1784 0.2737 0.27320 2017 10 30 58056 0.1766 0.2728 0.27172 2017 10 31 58057 0.1748 0.2719 0.27008 2017 11 1 58058 0.1730 0.2710 0.26827 2017 11 2 58059 0.1712 0.2702 0.26632 2017 11 3 58060 0.1693 0.2694 0.26431 2017 11 4 58061 0.1675 0.2686 0.26229 2017 11 5 58062 0.1656 0.2679 0.26037 2017 11 6 58063 0.1637 0.2671 0.25858 2017 11 7 58064 0.1618 0.2664 0.25693 2017 11 8 58065 0.1598 0.2658 0.25539 2017 11 9 58066 0.1579 0.2651 0.25390 2017 11 10 58067 0.1559 0.2645 0.25238 2017 11 11 58068 0.1540 0.2639 0.25080 2017 11 12 58069 0.1520 0.2633 0.24914 2017 11 13 58070 0.1500 0.2628 0.24742 2017 11 14 58071 0.1480 0.2623 0.24566 2017 11 15 58072 0.1460 0.2618 0.24391 2017 11 16 58073 0.1439 0.2614 0.24221 2017 11 17 58074 0.1419 0.2610 0.24060 2017 11 18 58075 0.1399 0.2606 0.23911 2017 11 19 58076 0.1378 0.2602 0.23773 2017 11 20 58077 0.1358 0.2599 0.23647 2017 11 21 58078 0.1337 0.2596 0.23531 2017 11 22 58079 0.1316 0.2593 0.23421 2017 11 23 58080 0.1295 0.2591 0.23314 2017 11 24 58081 0.1275 0.2589 0.23205 2017 11 25 58082 0.1254 0.2587 0.23088 2017 11 26 58083 0.1233 0.2585 0.22962 2017 11 27 58084 0.1212 0.2584 0.22823 2017 11 28 58085 0.1191 0.2583 0.22670 2017 11 29 58086 0.1170 0.2583 0.22503 2017 11 30 58087 0.1149 0.2582 0.22328 2017 12 1 58088 0.1128 0.2582 0.22149 2017 12 2 58089 0.1107 0.2583 0.21974 2017 12 3 58090 0.1086 0.2583 0.21811 2017 12 4 58091 0.1065 0.2584 0.21662 2017 12 5 58092 0.1043 0.2585 0.21526 2017 12 6 58093 0.1022 0.2587 0.21398 2017 12 7 58094 0.1001 0.2589 0.21270 2017 12 8 58095 0.0980 0.2591 0.21137 2017 12 9 58096 0.0959 0.2593 0.20997 2017 12 10 58097 0.0938 0.2596 0.20851 2017 12 11 58098 0.0918 0.2599 0.20702 2017 12 12 58099 0.0897 0.2602 0.20556 2017 12 13 58100 0.0876 0.2606 0.20416 2017 12 14 58101 0.0855 0.2610 0.20285 2017 12 15 58102 0.0835 0.2614 0.20167 2017 12 16 58103 0.0814 0.2619 0.20061 2017 12 17 58104 0.0793 0.2624 0.19968 2017 12 18 58105 0.0773 0.2629 0.19883 2017 12 19 58106 0.0753 0.2634 0.19806 2017 12 20 58107 0.0732 0.2640 0.19732 2017 12 21 58108 0.0712 0.2646 0.19656 2017 12 22 58109 0.0692 0.2653 0.19574 2017 12 23 58110 0.0672 0.2659 0.19482 2017 12 24 58111 0.0652 0.2666 0.19379 2017 12 25 58112 0.0633 0.2674 0.19261 2017 12 26 58113 0.0613 0.2681 0.19131 2017 12 27 58114 0.0594 0.2689 0.18990 2017 12 28 58115 0.0574 0.2697 0.18842 2017 12 29 58116 0.0555 0.2705 0.18694 2017 12 30 58117 0.0536 0.2714 0.18551 2017 12 31 58118 0.0517 0.2723 0.18419 2018 1 1 58119 0.0499 0.2732 0.18298 2018 1 2 58120 0.0480 0.2742 0.18184 2018 1 3 58121 0.0462 0.2752 0.18072 2018 1 4 58122 0.0443 0.2762 0.17953 2018 1 5 58123 0.0425 0.2772 0.17825 2018 1 6 58124 0.0407 0.2783 0.17688 2018 1 7 58125 0.0390 0.2794 0.17545 2018 1 8 58126 0.0372 0.2805 0.17401 2018 1 9 58127 0.0355 0.2816 0.17263 2018 1 10 58128 0.0338 0.2828 0.17133 2018 1 11 58129 0.0321 0.2840 0.17015 2018 1 12 58130 0.0305 0.2852 0.16910 2018 1 13 58131 0.0288 0.2864 0.16817 2018 1 14 58132 0.0272 0.2877 0.16733 2018 1 15 58133 0.0256 0.2890 0.16657 2018 1 16 58134 0.0240 0.2903 0.16584 2018 1 17 58135 0.0225 0.2916 0.16511 2018 1 18 58136 0.0209 0.2930 0.16432 2018 1 19 58137 0.0194 0.2944 0.16344 2018 1 20 58138 0.0180 0.2958 0.16243 2018 1 21 58139 0.0165 0.2972 0.16130 2018 1 22 58140 0.0151 0.2986 0.16003 2018 1 23 58141 0.0137 0.3001 0.15867 2018 1 24 58142 0.0123 0.3016 0.15723 2018 1 25 58143 0.0110 0.3031 0.15577 2018 1 26 58144 0.0096 0.3046 0.15435 2018 1 27 58145 0.0083 0.3062 0.15300 2018 1 28 58146 0.0071 0.3078 0.15174 2018 1 29 58147 0.0058 0.3094 0.15055 2018 1 30 58148 0.0046 0.3110 0.14938 2018 1 31 58149 0.0035 0.3126 0.14816 2018 2 1 58150 0.0023 0.3143 0.14682 2018 2 2 58151 0.0012 0.3159 0.14535 2018 2 3 58152 0.0001 0.3176 0.14377 2018 2 4 58153 -0.0010 0.3193 0.14214 2018 2 5 58154 -0.0020 0.3210 0.14054 2018 2 6 58155 -0.0030 0.3227 0.13901 2018 2 7 58156 -0.0039 0.3245 0.13759 2018 2 8 58157 -0.0049 0.3262 0.13631 2018 2 9 58158 -0.0058 0.3280 0.13516 2018 2 10 58159 -0.0066 0.3298 0.13411 2018 2 11 58160 -0.0075 0.3316 0.13314 2018 2 12 58161 -0.0083 0.3334 0.13222 2018 2 13 58162 -0.0091 0.3353 0.13129 2018 2 14 58163 -0.0098 0.3371 0.13031 2018 2 15 58164 -0.0105 0.3390 0.12924 2018 2 16 58165 -0.0112 0.3408 0.12804 2018 2 17 58166 -0.0118 0.3427 0.12671 2018 2 18 58167 -0.0124 0.3446 0.12523 2018 2 19 58168 -0.0130 0.3465 0.12364 2018 2 20 58169 -0.0135 0.3484 0.12198 2018 2 21 58170 -0.0140 0.3503 0.12029 2018 2 22 58171 -0.0145 0.3522 0.11864 2018 2 23 58172 -0.0149 0.3541 0.11706 2018 2 24 58173 -0.0153 0.3561 0.11556 2018 2 25 58174 -0.0157 0.3580 0.11414 2018 2 26 58175 -0.0160 0.3600 0.11274 2018 2 27 58176 -0.0163 0.3619 0.11130 2018 2 28 58177 -0.0166 0.3639 0.10975 2018 3 1 58178 -0.0168 0.3659 0.10805 2018 3 2 58179 -0.0170 0.3678 0.10620 2018 3 3 58180 -0.0171 0.3698 0.10425 2018 3 4 58181 -0.0173 0.3718 0.10226 2018 3 5 58182 -0.0173 0.3738 0.10031 2018 3 6 58183 -0.0174 0.3757 0.09846 2018 3 7 58184 -0.0174 0.3777 0.09676 2018 3 8 58185 -0.0174 0.3797 0.09522 2018 3 9 58186 -0.0173 0.3817 0.09383 2018 3 10 58187 -0.0172 0.3837 0.09259 2018 3 11 58188 -0.0171 0.3857 0.09145 2018 3 12 58189 -0.0169 0.3876 0.09037 2018 3 13 58190 -0.0167 0.3896 0.08930 2018 3 14 58191 -0.0164 0.3916 0.08819 2018 3 15 58192 -0.0162 0.3936 0.08700 2018 3 16 58193 -0.0159 0.3956 0.08568 2018 3 17 58194 -0.0155 0.3975 0.08423 2018 3 18 58195 -0.0151 0.3995 0.08266 2018 3 19 58196 -0.0147 0.4015 0.08101 2018 3 20 58197 -0.0142 0.4034 0.07933 2018 3 21 58198 -0.0138 0.4054 0.07770 2018 3 22 58199 -0.0132 0.4073 0.07617 2018 3 23 58200 -0.0127 0.4093 0.07475 2018 3 24 58201 -0.0121 0.4112 0.07343 2018 3 25 58202 -0.0115 0.4131 0.07216 2018 3 26 58203 -0.0108 0.4150 0.07087 2018 3 27 58204 -0.0101 0.4169 0.06947 2018 3 28 58205 -0.0094 0.4188 0.06791 2018 3 29 58206 -0.0086 0.4207 0.06615 2018 3 30 58207 -0.0078 0.4226 0.06422 2018 3 31 58208 -0.0070 0.4245 0.06217 2018 4 1 58209 -0.0061 0.4263 0.06008 2018 4 2 58210 -0.0052 0.4282 0.05803 2018 4 3 58211 -0.0043 0.4300 0.05610 2018 4 4 58212 -0.0033 0.4318 0.05433 2018 4 5 58213 -0.0023 0.4336 0.05274 2018 4 6 58214 -0.0013 0.4354 0.05131 2018 4 7 58215 -0.0002 0.4372 0.05001 2018 4 8 58216 0.0009 0.4390 0.04879 2018 4 9 58217 0.0020 0.4407 0.04758 2018 4 10 58218 0.0032 0.4425 0.04634 2018 4 11 58219 0.0043 0.4442 0.04504 2018 4 12 58220 0.0056 0.4459 0.04366 2018 4 13 58221 0.0068 0.4476 0.04215 2018 4 14 58222 0.0081 0.4492 0.04053 2018 4 15 58223 0.0094 0.4509 0.03881 2018 4 16 58224 0.0107 0.4525 0.03704 2018 4 17 58225 0.0121 0.4541 0.03530 2018 4 18 58226 0.0135 0.4557 0.03361 2018 4 19 58227 0.0149 0.4573 0.03206 2018 4 20 58228 0.0163 0.4589 0.03062 2018 4 21 58229 0.0178 0.4604 0.02928 2018 4 22 58230 0.0193 0.4619 0.02796 2018 4 23 58231 0.0208 0.4634 0.02659 2018 4 24 58232 0.0224 0.4649 0.02513 2018 4 25 58233 0.0240 0.4663 0.02354 2018 4 26 58234 0.0256 0.4678 0.02184 2018 4 27 58235 0.0272 0.4692 0.02012 2018 4 28 58236 0.0288 0.4706 0.01841 2018 4 29 58237 0.0305 0.4719 0.01674 2018 4 30 58238 0.0322 0.4732 0.01517 2018 5 1 58239 0.0340 0.4746 0.01368 2018 5 2 58240 0.0357 0.4758 0.01231 2018 5 3 58241 0.0375 0.4771 0.01108 2018 5 4 58242 0.0393 0.4783 0.00998 2018 5 5 58243 0.0411 0.4796 0.00895 2018 5 6 58244 0.0429 0.4807 0.00797 2018 5 7 58245 0.0447 0.4819 0.00697 2018 5 8 58246 0.0466 0.4830 0.00587 2018 5 9 58247 0.0485 0.4841 0.00468 2018 5 10 58248 0.0504 0.4852 0.00338 2018 5 11 58249 0.0523 0.4863 0.00197 2018 5 12 58250 0.0543 0.4873 0.00043 2018 5 13 58251 0.0563 0.4883 -0.00120 2018 5 14 58252 0.0582 0.4893 -0.00279 2018 5 15 58253 0.0602 0.4902 -0.00431 2018 5 16 58254 0.0622 0.4911 -0.00570 2018 5 17 58255 0.0643 0.4920 -0.00692 2018 5 18 58256 0.0663 0.4929 -0.00799 2018 5 19 58257 0.0684 0.4937 -0.00901 2018 5 20 58258 0.0704 0.4945 -0.00999 2018 5 21 58259 0.0725 0.4953 -0.01103 2018 5 22 58260 0.0746 0.4960 -0.01215 2018 5 23 58261 0.0767 0.4967 -0.01335 2018 5 24 58262 0.0788 0.4974 -0.01462 2018 5 25 58263 0.0809 0.4980 -0.01590 2018 5 26 58264 0.0831 0.4986 -0.01713 2018 5 27 58265 0.0852 0.4992 -0.01823 2018 5 28 58266 0.0874 0.4998 -0.01918 2018 5 29 58267 0.0895 0.5003 -0.01997 2018 5 30 58268 0.0917 0.5008 -0.02061 2018 5 31 58269 0.0939 0.5013 -0.02117 2018 6 1 58270 0.0961 0.5017 -0.02168 2018 6 2 58271 0.0983 0.5021 -0.02211 2018 6 3 58272 0.1005 0.5025 -0.02248 2018 6 4 58273 0.1027 0.5028 -0.02289 2018 6 5 58274 0.1049 0.5031 -0.02343 2018 6 6 58275 0.1071 0.5034 -0.02409 2018 6 7 58276 0.1093 0.5036 -0.02490 2018 6 8 58277 0.1115 0.5038 -0.02583 2018 6 9 58278 0.1137 0.5040 -0.02682 2018 6 10 58279 0.1159 0.5041 -0.02786 2018 6 11 58280 0.1181 0.5043 -0.02891 2018 6 12 58281 0.1204 0.5043 -0.02992 2018 6 13 58282 0.1226 0.5044 -0.03083 2018 6 14 58283 0.1248 0.5044 -0.03162 2018 6 15 58284 0.1270 0.5044 -0.03235 2018 6 16 58285 0.1292 0.5043 -0.03308 2018 6 17 58286 0.1314 0.5043 -0.03384 2018 6 18 58287 0.1336 0.5041 -0.03466 2018 6 19 58288 0.1358 0.5040 -0.03554 2018 6 20 58289 0.1380 0.5038 -0.03648 2018 6 21 58290 0.1402 0.5036 -0.03744 2018 6 22 58291 0.1424 0.5034 -0.03834 2018 6 23 58292 0.1446 0.5031 -0.03912 2018 6 24 58293 0.1467 0.5028 -0.03973 2018 6 25 58294 0.1489 0.5025 -0.04014 2018 6 26 58295 0.1511 0.5021 -0.04038 2018 6 27 58296 0.1532 0.5017 -0.04043 2018 6 28 58297 0.1553 0.5013 -0.04035 2018 6 29 58298 0.1575 0.5008 -0.04018 2018 6 30 58299 0.1596 0.5003 -0.03998 2018 7 1 58300 0.1617 0.4998 -0.03983 2018 7 2 58301 0.1638 0.4993 -0.03982 2018 7 3 58302 0.1659 0.4987 -0.04000 2018 7 4 58303 0.1679 0.4981 -0.04034 2018 7 5 58304 0.1700 0.4974 -0.04084 2018 7 6 58305 0.1720 0.4968 -0.04147 2018 7 7 58306 0.1740 0.4961 -0.04216 2018 7 8 58307 0.1761 0.4953 -0.04288 2018 7 9 58308 0.1781 0.4946 -0.04358 2018 7 10 58309 0.1800 0.4938 -0.04422 2018 7 11 58310 0.1820 0.4930 -0.04475 2018 7 12 58311 0.1839 0.4921 -0.04512 2018 7 13 58312 0.1859 0.4912 -0.04541 2018 7 14 58313 0.1878 0.4903 -0.04572 2018 7 15 58314 0.1897 0.4894 -0.04613 2018 7 16 58315 0.1916 0.4884 -0.04666 2018 7 17 58316 0.1934 0.4875 -0.04727 2018 7 18 58317 0.1952 0.4865 -0.04793 2018 7 19 58318 0.1971 0.4854 -0.04854 2018 7 20 58319 0.1988 0.4843 -0.04902 2018 7 21 58320 0.2006 0.4833 -0.04931 2018 7 22 58321 0.2024 0.4821 -0.04947 2018 7 23 58322 0.2041 0.4810 -0.04951 2018 7 24 58323 0.2058 0.4798 -0.04945 2018 7 25 58324 0.2075 0.4786 -0.04934 2018 7 26 58325 0.2091 0.4774 -0.04922 2018 7 27 58326 0.2108 0.4762 -0.04907 2018 7 28 58327 0.2124 0.4749 -0.04895 2018 7 29 58328 0.2139 0.4736 -0.04895 2018 7 30 58329 0.2155 0.4723 -0.04907 2018 7 31 58330 0.2170 0.4710 -0.04930 2018 8 1 58331 0.2185 0.4696 -0.04969 2018 8 2 58332 0.2200 0.4682 -0.05017 2018 8 3 58333 0.2215 0.4668 -0.05072 2018 8 4 58334 0.2229 0.4654 -0.05126 2018 8 5 58335 0.2243 0.4640 -0.05177 2018 8 6 58336 0.2257 0.4625 -0.05222 2018 8 7 58337 0.2270 0.4610 -0.05256 2018 8 8 58338 0.2283 0.4595 -0.05278 2018 8 9 58339 0.2296 0.4580 -0.05295 2018 8 10 58340 0.2308 0.4565 -0.05318 2018 8 11 58341 0.2321 0.4549 -0.05354 2018 8 12 58342 0.2332 0.4533 -0.05408 2018 8 13 58343 0.2344 0.4517 -0.05478 2018 8 14 58344 0.2355 0.4501 -0.05558 2018 8 15 58345 0.2366 0.4485 -0.05644 2018 8 16 58346 0.2377 0.4468 -0.05729 2018 8 17 58347 0.2387 0.4452 -0.05806 2018 8 18 58348 0.2397 0.4435 -0.05871 2018 8 19 58349 0.2407 0.4418 -0.05916 2018 8 20 58350 0.2417 0.4401 -0.05945 2018 8 21 58351 0.2426 0.4384 -0.05969 2018 8 22 58352 0.2434 0.4367 -0.05987 2018 8 23 58353 0.2443 0.4349 -0.06001 2018 8 24 58354 0.2451 0.4332 -0.06020 2018 8 25 58355 0.2459 0.4314 -0.06045 2018 8 26 58356 0.2466 0.4296 -0.06080 2018 8 27 58357 0.2473 0.4278 -0.06128 2018 8 28 58358 0.2480 0.4260 -0.06185 2018 8 29 58359 0.2486 0.4242 -0.06250 2018 8 30 58360 0.2492 0.4224 -0.06321 2018 8 31 58361 0.2498 0.4206 -0.06398 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) 57970 -109.51 0.30 -12.30 0.03 57971 -109.62 0.30 -12.39 0.03 57972 -109.62 0.30 -12.46 0.03 57973 -109.55 0.30 -12.45 0.15 57974 -109.56 0.30 -12.37 0.02 57975 -109.71 0.30 -12.29 0.02 57976 -109.87 0.30 -12.25 0.02 57977 -109.89 0.11 -12.23 0.02 57978 -109.83 0.30 -12.19 0.01 57979 -109.91 0.30 -12.12 0.01 57980 -110.23 0.30 -12.11 0.15 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 57970 0.073 0.119 0.169 0.030 57971 0.065 0.119 0.155 0.030 57972 0.073 0.119 0.124 0.030 57973 0.092 0.119 0.096 0.150 57974 0.110 0.119 0.088 0.020 57975 0.121 0.119 0.092 0.020 57976 0.131 0.119 0.102 0.020 57977 0.142 0.044 0.119 0.020 57978 0.145 0.119 0.135 0.010 57979 0.132 0.119 0.150 0.010 57980 0.121 0.119 0.142 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).