********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 26 October 2017 Vol. XXX No. 043 ______________________________________________________________________ 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 10 20 58046 0.19994 .00009 0.27216 .00009 0.295826 0.000011 17 10 21 58047 0.19865 .00009 0.27074 .00009 0.294542 0.000019 17 10 22 58048 0.19733 .00009 0.26955 .00009 0.293354 0.000016 17 10 23 58049 0.19599 .00009 0.26835 .00009 0.292249 0.000010 17 10 24 58050 0.19451 .00009 0.26700 .00009 0.291281 0.000010 17 10 25 58051 0.19269 .00009 0.26560 .00009 0.290424 0.000010 17 10 26 58052 0.19053 .00009 0.26411 .00009 0.289604 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 = 0.1164 + 0.1040 cos A - 0.0947 sin A - 0.0271 cos C - 0.0008 sin C y = 0.3455 - 0.0810 cos A - 0.0951 sin A - 0.0008 cos C + 0.0271 sin C UT1-UTC = 0.2720 - 0.00106 (MJD - 58060) - (UT2-UT1) where A = 2*pi*(MJD-58052)/365.25 and C = 2*pi*(MJD-58052)/435. TAI-UTC(MJD 58053) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58052)**0.80 S t = 0.00025 (MJD-58052)**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 10 27 58053 0.1885 0.2627 0.28878 2017 10 28 58054 0.1864 0.2612 0.28793 2017 10 29 58055 0.1845 0.2600 0.28700 2017 10 30 58056 0.1826 0.2588 0.28597 2017 10 31 58057 0.1808 0.2577 0.28484 2017 11 1 58058 0.1789 0.2567 0.28361 2017 11 2 58059 0.1770 0.2557 0.28228 2017 11 3 58060 0.1750 0.2548 0.28088 2017 11 4 58061 0.1731 0.2539 0.27949 2017 11 5 58062 0.1712 0.2531 0.27815 2017 11 6 58063 0.1693 0.2523 0.27689 2017 11 7 58064 0.1674 0.2515 0.27572 2017 11 8 58065 0.1654 0.2508 0.27462 2017 11 9 58066 0.1635 0.2501 0.27352 2017 11 10 58067 0.1615 0.2494 0.27238 2017 11 11 58068 0.1596 0.2488 0.27118 2017 11 12 58069 0.1576 0.2482 0.26990 2017 11 13 58070 0.1555 0.2477 0.26858 2017 11 14 58071 0.1535 0.2471 0.26726 2017 11 15 58072 0.1514 0.2466 0.26597 2017 11 16 58073 0.1492 0.2462 0.26477 2017 11 17 58074 0.1471 0.2457 0.26369 2017 11 18 58075 0.1450 0.2453 0.26274 2017 11 19 58076 0.1429 0.2449 0.26193 2017 11 20 58077 0.1408 0.2446 0.26124 2017 11 21 58078 0.1387 0.2443 0.26063 2017 11 22 58079 0.1366 0.2441 0.26006 2017 11 23 58080 0.1344 0.2439 0.25951 2017 11 24 58081 0.1323 0.2437 0.25892 2017 11 25 58082 0.1301 0.2435 0.25825 2017 11 26 58083 0.1280 0.2434 0.25745 2017 11 27 58084 0.1258 0.2433 0.25651 2017 11 28 58085 0.1237 0.2433 0.25541 2017 11 29 58086 0.1215 0.2432 0.25417 2017 11 30 58087 0.1194 0.2433 0.25283 2017 12 1 58088 0.1172 0.2433 0.25144 2017 12 2 58089 0.1151 0.2434 0.25009 2017 12 3 58090 0.1129 0.2435 0.24885 2017 12 4 58091 0.1107 0.2436 0.24774 2017 12 5 58092 0.1086 0.2438 0.24675 2017 12 6 58093 0.1064 0.2440 0.24583 2017 12 7 58094 0.1042 0.2443 0.24491 2017 12 8 58095 0.1021 0.2446 0.24394 2017 12 9 58096 0.0999 0.2449 0.24289 2017 12 10 58097 0.0978 0.2452 0.24178 2017 12 11 58098 0.0956 0.2456 0.24063 2017 12 12 58099 0.0935 0.2460 0.23949 2017 12 13 58100 0.0914 0.2464 0.23840 2017 12 14 58101 0.0892 0.2469 0.23739 2017 12 15 58102 0.0871 0.2474 0.23649 2017 12 16 58103 0.0850 0.2480 0.23569 2017 12 17 58104 0.0829 0.2485 0.23501 2017 12 18 58105 0.0808 0.2491 0.23440 2017 12 19 58106 0.0787 0.2498 0.23385 2017 12 20 58107 0.0767 0.2504 0.23332 2017 12 21 58108 0.0746 0.2511 0.23275 2017 12 22 58109 0.0725 0.2519 0.23212 2017 12 23 58110 0.0705 0.2526 0.23137 2017 12 24 58111 0.0685 0.2534 0.23050 2017 12 25 58112 0.0664 0.2542 0.22948 2017 12 26 58113 0.0644 0.2551 0.22833 2017 12 27 58114 0.0624 0.2560 0.22706 2017 12 28 58115 0.0605 0.2569 0.22573 2017 12 29 58116 0.0585 0.2578 0.22438 2017 12 30 58117 0.0566 0.2588 0.22309 2017 12 31 58118 0.0546 0.2598 0.22188 2018 1 1 58119 0.0527 0.2608 0.22077 2018 1 2 58120 0.0508 0.2619 0.21974 2018 1 3 58121 0.0490 0.2630 0.21871 2018 1 4 58122 0.0471 0.2641 0.21761 2018 1 5 58123 0.0453 0.2653 0.21642 2018 1 6 58124 0.0434 0.2664 0.21513 2018 1 7 58125 0.0416 0.2676 0.21378 2018 1 8 58126 0.0398 0.2689 0.21242 2018 1 9 58127 0.0381 0.2701 0.21112 2018 1 10 58128 0.0364 0.2714 0.20990 2018 1 11 58129 0.0346 0.2727 0.20881 2018 1 12 58130 0.0329 0.2740 0.20783 2018 1 13 58131 0.0313 0.2754 0.20698 2018 1 14 58132 0.0296 0.2768 0.20622 2018 1 15 58133 0.0280 0.2782 0.20553 2018 1 16 58134 0.0264 0.2796 0.20486 2018 1 17 58135 0.0248 0.2811 0.20418 2018 1 18 58136 0.0233 0.2826 0.20343 2018 1 19 58137 0.0217 0.2841 0.20258 2018 1 20 58138 0.0202 0.2856 0.20160 2018 1 21 58139 0.0188 0.2872 0.20048 2018 1 22 58140 0.0173 0.2888 0.19922 2018 1 23 58141 0.0159 0.2904 0.19786 2018 1 24 58142 0.0145 0.2920 0.19642 2018 1 25 58143 0.0132 0.2936 0.19496 2018 1 26 58144 0.0118 0.2953 0.19352 2018 1 27 58145 0.0105 0.2970 0.19216 2018 1 28 58146 0.0092 0.2987 0.19088 2018 1 29 58147 0.0080 0.3004 0.18967 2018 1 30 58148 0.0068 0.3022 0.18848 2018 1 31 58149 0.0056 0.3039 0.18723 2018 2 1 58150 0.0044 0.3057 0.18586 2018 2 2 58151 0.0033 0.3075 0.18436 2018 2 3 58152 0.0022 0.3093 0.18276 2018 2 4 58153 0.0012 0.3112 0.18110 2018 2 5 58154 0.0001 0.3130 0.17947 2018 2 6 58155 -0.0009 0.3149 0.17791 2018 2 7 58156 -0.0018 0.3168 0.17647 2018 2 8 58157 -0.0027 0.3187 0.17515 2018 2 9 58158 -0.0036 0.3206 0.17396 2018 2 10 58159 -0.0045 0.3225 0.17288 2018 2 11 58160 -0.0053 0.3245 0.17188 2018 2 12 58161 -0.0061 0.3264 0.17103 2018 2 13 58162 -0.0069 0.3284 0.17017 2018 2 14 58163 -0.0076 0.3304 0.16927 2018 2 15 58164 -0.0083 0.3323 0.16826 2018 2 16 58165 -0.0090 0.3343 0.16714 2018 2 17 58166 -0.0096 0.3364 0.16586 2018 2 18 58167 -0.0102 0.3384 0.16445 2018 2 19 58168 -0.0107 0.3404 0.16293 2018 2 20 58169 -0.0112 0.3424 0.16133 2018 2 21 58170 -0.0117 0.3445 0.15971 2018 2 22 58171 -0.0122 0.3466 0.15813 2018 2 23 58172 -0.0126 0.3486 0.15662 2018 2 24 58173 -0.0129 0.3507 0.15520 2018 2 25 58174 -0.0133 0.3528 0.15386 2018 2 26 58175 -0.0136 0.3548 0.15255 2018 2 27 58176 -0.0138 0.3569 0.15120 2018 2 28 58177 -0.0140 0.3590 0.14976 2018 3 1 58178 -0.0142 0.3611 0.14816 2018 3 2 58179 -0.0144 0.3632 0.14643 2018 3 3 58180 -0.0145 0.3653 0.14459 2018 3 4 58181 -0.0146 0.3674 0.14272 2018 3 5 58182 -0.0146 0.3695 0.14089 2018 3 6 58183 -0.0146 0.3716 0.13917 2018 3 7 58184 -0.0146 0.3737 0.13758 2018 3 8 58185 -0.0145 0.3759 0.13613 2018 3 9 58186 -0.0144 0.3780 0.13480 2018 3 10 58187 -0.0143 0.3801 0.13358 2018 3 11 58188 -0.0141 0.3822 0.13242 2018 3 12 58189 -0.0138 0.3843 0.13127 2018 3 13 58190 -0.0136 0.3864 0.13009 2018 3 14 58191 -0.0133 0.3885 0.12883 2018 3 15 58192 -0.0130 0.3906 0.12745 2018 3 16 58193 -0.0126 0.3927 0.12593 2018 3 17 58194 -0.0122 0.3947 0.12426 2018 3 18 58195 -0.0117 0.3968 0.12246 2018 3 19 58196 -0.0113 0.3989 0.12057 2018 3 20 58197 -0.0107 0.4010 0.11866 2018 3 21 58198 -0.0102 0.4030 0.11679 2018 3 22 58199 -0.0096 0.4051 0.11501 2018 3 23 58200 -0.0090 0.4071 0.11333 2018 3 24 58201 -0.0083 0.4092 0.11177 2018 3 25 58202 -0.0076 0.4112 0.11026 2018 3 26 58203 -0.0069 0.4132 0.10876 2018 3 27 58204 -0.0061 0.4152 0.10719 2018 3 28 58205 -0.0053 0.4172 0.10550 2018 3 29 58206 -0.0045 0.4192 0.10367 2018 3 30 58207 -0.0036 0.4212 0.10172 2018 3 31 58208 -0.0027 0.4231 0.09971 2018 4 1 58209 -0.0017 0.4251 0.09770 2018 4 2 58210 -0.0008 0.4270 0.09578 2018 4 3 58211 0.0003 0.4289 0.09398 2018 4 4 58212 0.0013 0.4308 0.09234 2018 4 5 58213 0.0024 0.4327 0.09084 2018 4 6 58214 0.0035 0.4346 0.08948 2018 4 7 58215 0.0046 0.4364 0.08820 2018 4 8 58216 0.0058 0.4383 0.08698 2018 4 9 58217 0.0070 0.4401 0.08575 2018 4 10 58218 0.0083 0.4419 0.08447 2018 4 11 58219 0.0096 0.4437 0.08310 2018 4 12 58220 0.0109 0.4455 0.08160 2018 4 13 58221 0.0122 0.4472 0.07996 2018 4 14 58222 0.0136 0.4490 0.07818 2018 4 15 58223 0.0150 0.4507 0.07630 2018 4 16 58224 0.0164 0.4524 0.07436 2018 4 17 58225 0.0179 0.4540 0.07243 2018 4 18 58226 0.0194 0.4557 0.07060 2018 4 19 58227 0.0209 0.4573 0.06889 2018 4 20 58228 0.0224 0.4589 0.06732 2018 4 21 58229 0.0240 0.4605 0.06583 2018 4 22 58230 0.0256 0.4621 0.06439 2018 4 23 58231 0.0272 0.4636 0.06290 2018 4 24 58232 0.0289 0.4651 0.06132 2018 4 25 58233 0.0306 0.4666 0.05961 2018 4 26 58234 0.0323 0.4681 0.05777 2018 4 27 58235 0.0340 0.4695 0.05584 2018 4 28 58236 0.0358 0.4709 0.05387 2018 4 29 58237 0.0376 0.4723 0.05193 2018 4 30 58238 0.0394 0.4737 0.05007 2018 5 1 58239 0.0412 0.4750 0.04832 2018 5 2 58240 0.0431 0.4763 0.04669 2018 5 3 58241 0.0450 0.4776 0.04518 2018 5 4 58242 0.0469 0.4789 0.04376 2018 5 5 58243 0.0488 0.4801 0.04241 2018 5 6 58244 0.0507 0.4813 0.04108 2018 5 7 58245 0.0527 0.4825 0.03975 2018 5 8 58246 0.0547 0.4836 0.03838 2018 5 9 58247 0.0567 0.4847 0.03693 2018 5 10 58248 0.0587 0.4858 0.03539 2018 5 11 58249 0.0608 0.4869 0.03377 2018 5 12 58250 0.0628 0.4879 0.03207 2018 5 13 58251 0.0649 0.4889 0.03033 2018 5 14 58252 0.0670 0.4898 0.02862 2018 5 15 58253 0.0691 0.4908 0.02698 2018 5 16 58254 0.0713 0.4917 0.02549 2018 5 17 58255 0.0734 0.4925 0.02416 2018 5 18 58256 0.0756 0.4934 0.02296 2018 5 19 58257 0.0777 0.4942 0.02183 2018 5 20 58258 0.0799 0.4950 0.02069 2018 5 21 58259 0.0821 0.4957 0.01949 2018 5 22 58260 0.0843 0.4964 0.01820 2018 5 23 58261 0.0866 0.4971 0.01682 2018 5 24 58262 0.0888 0.4977 0.01541 2018 5 25 58263 0.0911 0.4983 0.01401 2018 5 26 58264 0.0933 0.4989 0.01272 2018 5 27 58265 0.0956 0.4995 0.01159 2018 5 28 58266 0.0979 0.5000 0.01066 2018 5 29 58267 0.1002 0.5005 0.00995 2018 5 30 58268 0.1025 0.5009 0.00943 2018 5 31 58269 0.1048 0.5013 0.00904 2018 6 1 58270 0.1071 0.5017 0.00875 2018 6 2 58271 0.1094 0.5020 0.00854 2018 6 3 58272 0.1117 0.5023 0.00837 2018 6 4 58273 0.1140 0.5026 0.00817 2018 6 5 58274 0.1164 0.5028 0.00789 2018 6 6 58275 0.1187 0.5031 0.00748 2018 6 7 58276 0.1210 0.5032 0.00693 2018 6 8 58277 0.1234 0.5034 0.00628 2018 6 9 58278 0.1257 0.5035 0.00554 2018 6 10 58279 0.1280 0.5035 0.00473 2018 6 11 58280 0.1304 0.5036 0.00396 2018 6 12 58281 0.1327 0.5036 0.00329 2018 6 13 58282 0.1351 0.5035 0.00271 2018 6 14 58283 0.1374 0.5035 0.00226 2018 6 15 58284 0.1397 0.5034 0.00191 2018 6 16 58285 0.1421 0.5032 0.00152 2018 6 17 58286 0.1444 0.5030 0.00112 2018 6 18 58287 0.1467 0.5028 0.00065 2018 6 19 58288 0.1491 0.5026 0.00010 2018 6 20 58289 0.1514 0.5023 -0.00047 2018 6 21 58290 0.1537 0.5020 -0.00105 2018 6 22 58291 0.1560 0.5017 -0.00158 2018 6 23 58292 0.1583 0.5013 -0.00202 2018 6 24 58293 0.1606 0.5009 -0.00238 2018 6 25 58294 0.1629 0.5004 -0.00264 2018 6 26 58295 0.1651 0.4999 -0.00276 2018 6 27 58296 0.1674 0.4994 -0.00269 2018 6 28 58297 0.1697 0.4989 -0.00248 2018 6 29 58298 0.1719 0.4983 -0.00221 2018 6 30 58299 0.1741 0.4977 -0.00195 2018 7 1 58300 0.1764 0.4970 -0.00174 2018 7 2 58301 0.1786 0.4964 -0.00158 2018 7 3 58302 0.1808 0.4957 -0.00147 2018 7 4 58303 0.1829 0.4949 -0.00149 2018 7 5 58304 0.1851 0.4941 -0.00158 2018 7 6 58305 0.1873 0.4933 -0.00172 2018 7 7 58306 0.1894 0.4925 -0.00190 2018 7 8 58307 0.1915 0.4916 -0.00213 2018 7 9 58308 0.1936 0.4907 -0.00233 2018 7 10 58309 0.1957 0.4898 -0.00241 2018 7 11 58310 0.1978 0.4888 -0.00237 2018 7 12 58311 0.1998 0.4878 -0.00228 2018 7 13 58312 0.2019 0.4868 -0.00221 2018 7 14 58313 0.2039 0.4858 -0.00226 2018 7 15 58314 0.2059 0.4847 -0.00241 2018 7 16 58315 0.2079 0.4836 -0.00270 2018 7 17 58316 0.2098 0.4824 -0.00315 2018 7 18 58317 0.2118 0.4813 -0.00367 2018 7 19 58318 0.2137 0.4801 -0.00423 2018 7 20 58319 0.2156 0.4788 -0.00481 2018 7 21 58320 0.2174 0.4776 -0.00531 2018 7 22 58321 0.2193 0.4763 -0.00570 2018 7 23 58322 0.2211 0.4750 -0.00593 2018 7 24 58323 0.2229 0.4737 -0.00602 2018 7 25 58324 0.2247 0.4723 -0.00601 2018 7 26 58325 0.2264 0.4709 -0.00591 2018 7 27 58326 0.2281 0.4695 -0.00576 2018 7 28 58327 0.2298 0.4681 -0.00563 2018 7 29 58328 0.2315 0.4666 -0.00554 2018 7 30 58329 0.2331 0.4651 -0.00555 2018 7 31 58330 0.2348 0.4636 -0.00568 2018 8 1 58331 0.2363 0.4621 -0.00589 2018 8 2 58332 0.2379 0.4605 -0.00618 2018 8 3 58333 0.2394 0.4589 -0.00652 2018 8 4 58334 0.2409 0.4573 -0.00688 2018 8 5 58335 0.2424 0.4557 -0.00722 2018 8 6 58336 0.2438 0.4541 -0.00750 2018 8 7 58337 0.2453 0.4524 -0.00771 2018 8 8 58338 0.2466 0.4507 -0.00788 2018 8 9 58339 0.2480 0.4490 -0.00801 2018 8 10 58340 0.2493 0.4473 -0.00819 2018 8 11 58341 0.2506 0.4455 -0.00850 2018 8 12 58342 0.2519 0.4438 -0.00902 2018 8 13 58343 0.2531 0.4420 -0.00971 2018 8 14 58344 0.2543 0.4402 -0.01053 2018 8 15 58345 0.2554 0.4384 -0.01141 2018 8 16 58346 0.2566 0.4365 -0.01223 2018 8 17 58347 0.2576 0.4347 -0.01288 2018 8 18 58348 0.2587 0.4328 -0.01335 2018 8 19 58349 0.2597 0.4309 -0.01370 2018 8 20 58350 0.2607 0.4290 -0.01393 2018 8 21 58351 0.2617 0.4271 -0.01413 2018 8 22 58352 0.2626 0.4252 -0.01432 2018 8 23 58353 0.2635 0.4233 -0.01452 2018 8 24 58354 0.2643 0.4213 -0.01474 2018 8 25 58355 0.2652 0.4194 -0.01506 2018 8 26 58356 0.2659 0.4174 -0.01548 2018 8 27 58357 0.2667 0.4154 -0.01604 2018 8 28 58358 0.2674 0.4134 -0.01676 2018 8 29 58359 0.2681 0.4114 -0.01762 2018 8 30 58360 0.2687 0.4094 -0.01854 2018 8 31 58361 0.2693 0.4074 -0.01949 2018 9 1 58362 0.2699 0.4054 -0.02044 2018 9 2 58363 0.2704 0.4033 -0.02137 2018 9 3 58364 0.2709 0.4013 -0.02216 2018 9 4 58365 0.2713 0.3992 -0.02287 2018 9 5 58366 0.2718 0.3972 -0.02355 2018 9 6 58367 0.2721 0.3951 -0.02423 2018 9 7 58368 0.2725 0.3930 -0.02498 2018 9 8 58369 0.2728 0.3910 -0.02593 2018 9 9 58370 0.2731 0.3889 -0.02705 2018 9 10 58371 0.2733 0.3868 -0.02833 2018 9 11 58372 0.2735 0.3847 -0.02971 2018 9 12 58373 0.2736 0.3826 -0.03108 2018 9 13 58374 0.2738 0.3806 -0.03236 2018 9 14 58375 0.2738 0.3785 -0.03352 2018 9 15 58376 0.2739 0.3764 -0.03450 2018 9 16 58377 0.2739 0.3743 -0.03531 2018 9 17 58378 0.2739 0.3722 -0.03598 2018 9 18 58379 0.2738 0.3701 -0.03658 2018 9 19 58380 0.2737 0.3680 -0.03717 2018 9 20 58381 0.2735 0.3660 -0.03784 2018 9 21 58382 0.2734 0.3639 -0.03862 2018 9 22 58383 0.2731 0.3618 -0.03950 2018 9 23 58384 0.2729 0.3597 -0.04045 2018 9 24 58385 0.2726 0.3577 -0.04154 2018 9 25 58386 0.2723 0.3556 -0.04281 2018 9 26 58387 0.2719 0.3536 -0.04420 2018 9 27 58388 0.2715 0.3515 -0.04567 2018 9 28 58389 0.2711 0.3495 -0.04714 2018 9 29 58390 0.2706 0.3474 -0.04854 2018 9 30 58391 0.2701 0.3454 -0.04984 2018 10 1 58392 0.2696 0.3434 -0.05107 2018 10 2 58393 0.2690 0.3414 -0.05228 2018 10 3 58394 0.2684 0.3394 -0.05352 2018 10 4 58395 0.2677 0.3374 -0.05483 2018 10 5 58396 0.2670 0.3354 -0.05631 2018 10 6 58397 0.2663 0.3334 -0.05799 2018 10 7 58398 0.2655 0.3315 -0.05984 2018 10 8 58399 0.2648 0.3295 -0.06178 2018 10 9 58400 0.2639 0.3276 -0.06375 2018 10 10 58401 0.2631 0.3257 -0.06566 2018 10 11 58402 0.2622 0.3238 -0.06745 2018 10 12 58403 0.2612 0.3219 -0.06908 2018 10 13 58404 0.2603 0.3200 -0.07051 2018 10 14 58405 0.2593 0.3181 -0.07174 2018 10 15 58406 0.2583 0.3163 -0.07283 2018 10 16 58407 0.2572 0.3145 -0.07384 2018 10 17 58408 0.2561 0.3127 -0.07478 2018 10 18 58409 0.2550 0.3109 -0.07575 2018 10 19 58410 0.2539 0.3091 -0.07676 2018 10 20 58411 0.2527 0.3073 -0.07789 2018 10 21 58412 0.2515 0.3056 -0.07915 2018 10 22 58413 0.2502 0.3039 -0.08061 2018 10 23 58414 0.2489 0.3022 -0.08227 2018 10 24 58415 0.2476 0.3005 -0.08404 2018 10 25 58416 0.2463 0.2988 -0.08586 2018 10 26 58417 0.2449 0.2972 -0.08767 These predictions are based on all announced leap seconds. 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).