********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 26 April 2018 Vol. XXXI No. 017 ______________________________________________________________________ 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 = +0.1 seconds beginning 15 Mar 2018 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 18 4 20 58228 0.05178 .00009 0.42450 .00009 0.115483 0.000009 18 4 21 58229 0.05401 .00009 0.42598 .00009 0.114503 0.000009 18 4 22 58230 0.05613 .00009 0.42753 .00009 0.113528 0.000008 18 4 23 58231 0.05809 .00009 0.42912 .00009 0.112519 0.000007 18 4 24 58232 0.05991 .00009 0.43067 .00009 0.111390 0.000007 18 4 25 58233 0.06146 .00009 0.43200 .00009 0.110079 0.000006 18 4 26 58234 0.06273 .00009 0.43304 .00009 0.108644 0.000005 _______________________________________________________________________ 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 = 0.1199 - 0.0855 cos A + 0.1187 sin A + 0.0255 cos C - 0.0210 sin C y = 0.3419 + 0.1104 cos A + 0.0848 sin A - 0.0210 cos C - 0.0255 sin C UT1-UTC = 0.1500 - 0.00081 (MJD - 58242) - (UT2-UT1) where A = 2*pi*(MJD-58234)/365.25 and C = 2*pi*(MJD-58234)/435. TAI-UTC(MJD 58235) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58234)**0.80 S t = 0.00025 (MJD-58234)**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) 2018 4 27 58235 0.0640 0.4339 0.10712 2018 4 28 58236 0.0653 0.4346 0.10560 2018 4 29 58237 0.0668 0.4354 0.10416 2018 4 30 58238 0.0683 0.4362 0.10287 2018 5 1 58239 0.0698 0.4370 0.10174 2018 5 2 58240 0.0713 0.4378 0.10077 2018 5 3 58241 0.0729 0.4385 0.09995 2018 5 4 58242 0.0744 0.4393 0.09926 2018 5 5 58243 0.0760 0.4400 0.09865 2018 5 6 58244 0.0776 0.4406 0.09806 2018 5 7 58245 0.0792 0.4411 0.09745 2018 5 8 58246 0.0808 0.4416 0.09675 2018 5 9 58247 0.0825 0.4421 0.09595 2018 5 10 58248 0.0842 0.4426 0.09504 2018 5 11 58249 0.0859 0.4431 0.09404 2018 5 12 58250 0.0877 0.4435 0.09296 2018 5 13 58251 0.0894 0.4440 0.09185 2018 5 14 58252 0.0911 0.4444 0.09076 2018 5 15 58253 0.0928 0.4448 0.08978 2018 5 16 58254 0.0945 0.4451 0.08896 2018 5 17 58255 0.0961 0.4454 0.08831 2018 5 18 58256 0.0978 0.4457 0.08779 2018 5 19 58257 0.0994 0.4459 0.08736 2018 5 20 58258 0.1011 0.4461 0.08694 2018 5 21 58259 0.1028 0.4463 0.08647 2018 5 22 58260 0.1044 0.4464 0.08593 2018 5 23 58261 0.1061 0.4466 0.08530 2018 5 24 58262 0.1078 0.4467 0.08461 2018 5 25 58263 0.1095 0.4467 0.08393 2018 5 26 58264 0.1111 0.4468 0.08329 2018 5 27 58265 0.1128 0.4468 0.08277 2018 5 28 58266 0.1145 0.4467 0.08239 2018 5 29 58267 0.1162 0.4467 0.08218 2018 5 30 58268 0.1179 0.4466 0.08211 2018 5 31 58269 0.1195 0.4465 0.08217 2018 6 1 58270 0.1212 0.4463 0.08231 2018 6 2 58271 0.1229 0.4462 0.08251 2018 6 3 58272 0.1246 0.4460 0.08272 2018 6 4 58273 0.1262 0.4458 0.08289 2018 6 5 58274 0.1279 0.4455 0.08298 2018 6 6 58275 0.1296 0.4453 0.08297 2018 6 7 58276 0.1312 0.4450 0.08285 2018 6 8 58277 0.1328 0.4446 0.08261 2018 6 9 58278 0.1345 0.4443 0.08228 2018 6 10 58279 0.1361 0.4439 0.08190 2018 6 11 58280 0.1377 0.4435 0.08154 2018 6 12 58281 0.1393 0.4431 0.08124 2018 6 13 58282 0.1409 0.4426 0.08106 2018 6 14 58283 0.1425 0.4421 0.08100 2018 6 15 58284 0.1441 0.4416 0.08102 2018 6 16 58285 0.1457 0.4411 0.08104 2018 6 17 58286 0.1473 0.4405 0.08099 2018 6 18 58287 0.1488 0.4399 0.08082 2018 6 19 58288 0.1504 0.4393 0.08053 2018 6 20 58289 0.1519 0.4387 0.08016 2018 6 21 58290 0.1534 0.4380 0.07977 2018 6 22 58291 0.1550 0.4373 0.07943 2018 6 23 58292 0.1565 0.4366 0.07918 2018 6 24 58293 0.1579 0.4359 0.07908 2018 6 25 58294 0.1594 0.4352 0.07913 2018 6 26 58295 0.1609 0.4344 0.07934 2018 6 27 58296 0.1623 0.4336 0.07970 2018 6 28 58297 0.1638 0.4327 0.08015 2018 6 29 58298 0.1652 0.4319 0.08068 2018 6 30 58299 0.1666 0.4310 0.08122 2018 7 1 58300 0.1679 0.4301 0.08173 2018 7 2 58301 0.1693 0.4292 0.08218 2018 7 3 58302 0.1707 0.4283 0.08252 2018 7 4 58303 0.1720 0.4273 0.08274 2018 7 5 58304 0.1733 0.4263 0.08284 2018 7 6 58305 0.1746 0.4253 0.08285 2018 7 7 58306 0.1759 0.4243 0.08278 2018 7 8 58307 0.1771 0.4233 0.08270 2018 7 9 58308 0.1784 0.4222 0.08265 2018 7 10 58309 0.1796 0.4211 0.08268 2018 7 11 58310 0.1808 0.4200 0.08281 2018 7 12 58311 0.1820 0.4189 0.08304 2018 7 13 58312 0.1831 0.4178 0.08329 2018 7 14 58313 0.1843 0.4166 0.08349 2018 7 15 58314 0.1854 0.4154 0.08356 2018 7 16 58315 0.1865 0.4142 0.08349 2018 7 17 58316 0.1876 0.4130 0.08330 2018 7 18 58317 0.1886 0.4118 0.08305 2018 7 19 58318 0.1896 0.4106 0.08281 2018 7 20 58319 0.1906 0.4093 0.08266 2018 7 21 58320 0.1916 0.4080 0.08264 2018 7 22 58321 0.1926 0.4067 0.08277 2018 7 23 58322 0.1935 0.4054 0.08304 2018 7 24 58323 0.1944 0.4041 0.08343 2018 7 25 58324 0.1953 0.4028 0.08392 2018 7 26 58325 0.1962 0.4014 0.08446 2018 7 27 58326 0.1970 0.4001 0.08500 2018 7 28 58327 0.1978 0.3987 0.08550 2018 7 29 58328 0.1986 0.3973 0.08592 2018 7 30 58329 0.1993 0.3959 0.08622 2018 7 31 58330 0.2001 0.3945 0.08639 2018 8 1 58331 0.2008 0.3930 0.08644 2018 8 2 58332 0.2014 0.3916 0.08638 2018 8 3 58333 0.2021 0.3902 0.08625 2018 8 4 58334 0.2027 0.3887 0.08608 2018 8 5 58335 0.2033 0.3872 0.08593 2018 8 6 58336 0.2039 0.3857 0.08582 2018 8 7 58337 0.2044 0.3843 0.08580 2018 8 8 58338 0.2049 0.3828 0.08586 2018 8 9 58339 0.2054 0.3813 0.08594 2018 8 10 58340 0.2059 0.3798 0.08599 2018 8 11 58341 0.2063 0.3782 0.08591 2018 8 12 58342 0.2067 0.3767 0.08567 2018 8 13 58343 0.2071 0.3752 0.08532 2018 8 14 58344 0.2074 0.3736 0.08485 2018 8 15 58345 0.2077 0.3721 0.08436 2018 8 16 58346 0.2080 0.3705 0.08392 2018 8 17 58347 0.2083 0.3690 0.08361 2018 8 18 58348 0.2085 0.3674 0.08344 2018 8 19 58349 0.2087 0.3659 0.08343 2018 8 20 58350 0.2089 0.3643 0.08356 2018 8 21 58351 0.2090 0.3627 0.08378 2018 8 22 58352 0.2091 0.3612 0.08405 2018 8 23 58353 0.2092 0.3596 0.08434 2018 8 24 58354 0.2092 0.3580 0.08458 2018 8 25 58355 0.2092 0.3565 0.08475 2018 8 26 58356 0.2092 0.3549 0.08479 2018 8 27 58357 0.2092 0.3533 0.08470 2018 8 28 58358 0.2091 0.3517 0.08447 2018 8 29 58359 0.2090 0.3502 0.08412 2018 8 30 58360 0.2089 0.3486 0.08368 2018 8 31 58361 0.2087 0.3470 0.08320 2018 9 1 58362 0.2085 0.3455 0.08272 2018 9 2 58363 0.2083 0.3439 0.08230 2018 9 3 58364 0.2081 0.3424 0.08194 2018 9 4 58365 0.2078 0.3408 0.08166 2018 9 5 58366 0.2075 0.3393 0.08141 2018 9 6 58367 0.2072 0.3377 0.08115 2018 9 7 58368 0.2068 0.3362 0.08078 2018 9 8 58369 0.2064 0.3346 0.08024 2018 9 9 58370 0.2060 0.3331 0.07951 2018 9 10 58371 0.2055 0.3316 0.07861 2018 9 11 58372 0.2050 0.3301 0.07761 2018 9 12 58373 0.2045 0.3286 0.07661 2018 9 13 58374 0.2040 0.3271 0.07569 2018 9 14 58375 0.2034 0.3256 0.07492 2018 9 15 58376 0.2028 0.3241 0.07431 2018 9 16 58377 0.2022 0.3226 0.07385 2018 9 17 58378 0.2015 0.3212 0.07351 2018 9 18 58379 0.2009 0.3197 0.07324 2018 9 19 58380 0.2002 0.3183 0.07299 2018 9 20 58381 0.1994 0.3169 0.07272 2018 9 21 58382 0.1987 0.3154 0.07236 2018 9 22 58383 0.1979 0.3140 0.07190 2018 9 23 58384 0.1970 0.3126 0.07130 2018 9 24 58385 0.1962 0.3113 0.07055 2018 9 25 58386 0.1953 0.3099 0.06967 2018 9 26 58387 0.1944 0.3085 0.06869 2018 9 27 58388 0.1935 0.3072 0.06766 2018 9 28 58389 0.1926 0.3059 0.06663 2018 9 29 58390 0.1916 0.3046 0.06566 2018 9 30 58391 0.1906 0.3033 0.06478 2018 10 1 58392 0.1896 0.3020 0.06399 2018 10 2 58393 0.1885 0.3008 0.06327 2018 10 3 58394 0.1875 0.2995 0.06256 2018 10 4 58395 0.1864 0.2983 0.06178 2018 10 5 58396 0.1852 0.2971 0.06088 2018 10 6 58397 0.1841 0.2959 0.05979 2018 10 7 58398 0.1829 0.2947 0.05852 2018 10 8 58399 0.1817 0.2936 0.05711 2018 10 9 58400 0.1805 0.2924 0.05565 2018 10 10 58401 0.1793 0.2913 0.05423 2018 10 11 58402 0.1780 0.2902 0.05293 2018 10 12 58403 0.1768 0.2891 0.05179 2018 10 13 58404 0.1755 0.2881 0.05083 2018 10 14 58405 0.1741 0.2870 0.05001 2018 10 15 58406 0.1728 0.2860 0.04929 2018 10 16 58407 0.1715 0.2850 0.04864 2018 10 17 58408 0.1701 0.2841 0.04798 2018 10 18 58409 0.1687 0.2831 0.04727 2018 10 19 58410 0.1673 0.2822 0.04647 2018 10 20 58411 0.1658 0.2813 0.04555 2018 10 21 58412 0.1644 0.2804 0.04449 2018 10 22 58413 0.1629 0.2795 0.04330 2018 10 23 58414 0.1614 0.2787 0.04200 2018 10 24 58415 0.1599 0.2779 0.04062 2018 10 25 58416 0.1584 0.2771 0.03925 2018 10 26 58417 0.1569 0.2763 0.03792 2018 10 27 58418 0.1553 0.2756 0.03671 2018 10 28 58419 0.1538 0.2749 0.03561 2018 10 29 58420 0.1522 0.2742 0.03462 2018 10 30 58421 0.1506 0.2735 0.03368 2018 10 31 58422 0.1490 0.2729 0.03271 2018 11 1 58423 0.1474 0.2722 0.03163 2018 11 2 58424 0.1458 0.2717 0.03039 2018 11 3 58425 0.1441 0.2711 0.02896 2018 11 4 58426 0.1425 0.2706 0.02737 2018 11 5 58427 0.1408 0.2700 0.02569 2018 11 6 58428 0.1391 0.2696 0.02401 2018 11 7 58429 0.1374 0.2691 0.02242 2018 11 8 58430 0.1357 0.2687 0.02100 2018 11 9 58431 0.1340 0.2683 0.01978 2018 11 10 58432 0.1323 0.2679 0.01874 2018 11 11 58433 0.1306 0.2675 0.01785 2018 11 12 58434 0.1289 0.2672 0.01707 2018 11 13 58435 0.1272 0.2669 0.01633 2018 11 14 58436 0.1254 0.2666 0.01559 2018 11 15 58437 0.1237 0.2664 0.01479 2018 11 16 58438 0.1219 0.2662 0.01388 2018 11 17 58439 0.1202 0.2660 0.01286 2018 11 18 58440 0.1184 0.2658 0.01172 2018 11 19 58441 0.1166 0.2657 0.01047 2018 11 20 58442 0.1149 0.2656 0.00917 2018 11 21 58443 0.1131 0.2655 0.00786 2018 11 22 58444 0.1113 0.2655 0.00663 2018 11 23 58445 0.1095 0.2655 0.00553 2018 11 24 58446 0.1078 0.2655 0.00460 2018 11 25 58447 0.1060 0.2655 0.00384 2018 11 26 58448 0.1042 0.2656 0.00319 2018 11 27 58449 0.1024 0.2657 0.00258 2018 11 28 58450 0.1007 0.2658 0.00191 2018 11 29 58451 0.0989 0.2660 0.00114 2018 11 30 58452 0.0971 0.2662 0.00023 2018 12 1 58453 0.0954 0.2664 -0.00079 2018 12 2 58454 0.0936 0.2666 -0.00188 2018 12 3 58455 0.0918 0.2669 -0.00297 2018 12 4 58456 0.0901 0.2672 -0.00402 2018 12 5 58457 0.0883 0.2675 -0.00501 2018 12 6 58458 0.0866 0.2678 -0.00595 2018 12 7 58459 0.0848 0.2682 -0.00679 2018 12 8 58460 0.0831 0.2686 -0.00750 2018 12 9 58461 0.0814 0.2690 -0.00803 2018 12 10 58462 0.0796 0.2695 -0.00847 2018 12 11 58463 0.0779 0.2700 -0.00887 2018 12 12 58464 0.0762 0.2705 -0.00935 2018 12 13 58465 0.0745 0.2710 -0.00995 2018 12 14 58466 0.0728 0.2716 -0.01066 2018 12 15 58467 0.0711 0.2722 -0.01153 2018 12 16 58468 0.0695 0.2728 -0.01250 2018 12 17 58469 0.0678 0.2735 -0.01361 2018 12 18 58470 0.0662 0.2742 -0.01482 2018 12 19 58471 0.0645 0.2749 -0.01601 2018 12 20 58472 0.0629 0.2756 -0.01711 2018 12 21 58473 0.0613 0.2763 -0.01804 2018 12 22 58474 0.0597 0.2771 -0.01887 2018 12 23 58475 0.0581 0.2779 -0.01959 2018 12 24 58476 0.0566 0.2787 -0.02027 2018 12 25 58477 0.0550 0.2796 -0.02103 2018 12 26 58478 0.0535 0.2805 -0.02189 2018 12 27 58479 0.0519 0.2814 -0.02292 2018 12 28 58480 0.0504 0.2823 -0.02406 2018 12 29 58481 0.0489 0.2833 -0.02528 2018 12 30 58482 0.0475 0.2842 -0.02651 2018 12 31 58483 0.0460 0.2852 -0.02766 2019 1 1 58484 0.0446 0.2863 -0.02864 2019 1 2 58485 0.0432 0.2873 -0.02947 2019 1 3 58486 0.0418 0.2884 -0.03018 2019 1 4 58487 0.0404 0.2895 -0.03078 2019 1 5 58488 0.0390 0.2906 -0.03126 2019 1 6 58489 0.0377 0.2917 -0.03161 2019 1 7 58490 0.0363 0.2929 -0.03195 2019 1 8 58491 0.0351 0.2940 -0.03231 2019 1 9 58492 0.0338 0.2952 -0.03270 2019 1 10 58493 0.0325 0.2965 -0.03321 2019 1 11 58494 0.0313 0.2977 -0.03386 2019 1 12 58495 0.0301 0.2989 -0.03467 2019 1 13 58496 0.0289 0.3002 -0.03549 2019 1 14 58497 0.0277 0.3015 -0.03643 2019 1 15 58498 0.0266 0.3028 -0.03749 2019 1 16 58499 0.0255 0.3042 -0.03850 2019 1 17 58500 0.0244 0.3055 -0.03943 2019 1 18 58501 0.0233 0.3069 -0.04033 2019 1 19 58502 0.0222 0.3083 -0.04111 2019 1 20 58503 0.0212 0.3097 -0.04189 2019 1 21 58504 0.0202 0.3111 -0.04272 2019 1 22 58505 0.0193 0.3125 -0.04370 2019 1 23 58506 0.0183 0.3140 -0.04490 2019 1 24 58507 0.0174 0.3154 -0.04631 2019 1 25 58508 0.0165 0.3169 -0.04792 2019 1 26 58509 0.0157 0.3184 -0.04960 2019 1 27 58510 0.0148 0.3199 -0.05121 2019 1 28 58511 0.0140 0.3214 -0.05271 2019 1 29 58512 0.0133 0.3230 -0.05406 2019 1 30 58513 0.0125 0.3245 -0.05527 2019 1 31 58514 0.0118 0.3261 -0.05640 2019 2 1 58515 0.0111 0.3276 -0.05738 2019 2 2 58516 0.0104 0.3292 -0.05827 2019 2 3 58517 0.0098 0.3308 -0.05915 2019 2 4 58518 0.0092 0.3324 -0.06008 2019 2 5 58519 0.0086 0.3340 -0.06111 2019 2 6 58520 0.0081 0.3356 -0.06227 2019 2 7 58521 0.0076 0.3372 -0.06359 2019 2 8 58522 0.0071 0.3389 -0.06499 2019 2 9 58523 0.0066 0.3405 -0.06651 2019 2 10 58524 0.0062 0.3422 -0.06805 2019 2 11 58525 0.0058 0.3438 -0.06956 2019 2 12 58526 0.0055 0.3455 -0.07102 2019 2 13 58527 0.0051 0.3472 -0.07242 2019 2 14 58528 0.0048 0.3488 -0.07376 2019 2 15 58529 0.0046 0.3505 -0.07505 2019 2 16 58530 0.0043 0.3522 -0.07629 2019 2 17 58531 0.0041 0.3539 -0.07745 2019 2 18 58532 0.0039 0.3556 -0.07873 2019 2 19 58533 0.0038 0.3573 -0.08016 2019 2 20 58534 0.0037 0.3590 -0.08181 2019 2 21 58535 0.0036 0.3607 -0.08374 2019 2 22 58536 0.0036 0.3624 -0.08587 2019 2 23 58537 0.0035 0.3641 -0.08804 2019 2 24 58538 0.0036 0.3658 -0.09013 2019 2 25 58539 0.0036 0.3675 -0.09206 2019 2 26 58540 0.0037 0.3692 -0.09376 2019 2 27 58541 0.0038 0.3709 -0.09523 2019 2 28 58542 0.0039 0.3726 -0.09658 2019 3 1 58543 0.0041 0.3742 -0.09783 2019 3 2 58544 0.0043 0.3759 -0.09898 2019 3 3 58545 0.0046 0.3776 -0.10014 2019 3 4 58546 0.0048 0.3793 -0.10134 2019 3 5 58547 0.0051 0.3810 -0.10261 2019 3 6 58548 0.0055 0.3827 -0.10405 2019 3 7 58549 0.0058 0.3843 -0.10562 2019 3 8 58550 0.0062 0.3860 -0.10720 2019 3 9 58551 0.0066 0.3877 -0.10885 2019 3 10 58552 0.0071 0.3893 -0.11056 2019 3 11 58553 0.0076 0.3910 -0.11228 2019 3 12 58554 0.0081 0.3926 -0.11393 2019 3 13 58555 0.0087 0.3942 -0.11547 2019 3 14 58556 0.0092 0.3958 -0.11689 2019 3 15 58557 0.0099 0.3975 -0.11820 2019 3 16 58558 0.0105 0.3991 -0.11950 2019 3 17 58559 0.0112 0.4006 -0.12087 2019 3 18 58560 0.0119 0.4022 -0.12242 2019 3 19 58561 0.0126 0.4038 -0.12407 2019 3 20 58562 0.0134 0.4053 -0.12599 2019 3 21 58563 0.0142 0.4069 -0.12813 2019 3 22 58564 0.0150 0.4084 -0.13033 2019 3 23 58565 0.0158 0.4099 -0.13255 2019 3 24 58566 0.0167 0.4114 -0.13462 2019 3 25 58567 0.0176 0.4129 -0.13649 2019 3 26 58568 0.0186 0.4144 -0.13819 2019 3 27 58569 0.0195 0.4159 -0.13977 2019 3 28 58570 0.0205 0.4173 -0.14121 2019 3 29 58571 0.0215 0.4188 -0.14259 2019 3 30 58572 0.0226 0.4202 -0.14402 2019 3 31 58573 0.0237 0.4216 -0.14553 2019 4 1 58574 0.0248 0.4230 -0.14719 2019 4 2 58575 0.0259 0.4243 -0.14897 2019 4 3 58576 0.0270 0.4257 -0.15087 2019 4 4 58577 0.0282 0.4270 -0.15289 2019 4 5 58578 0.0294 0.4283 -0.15503 2019 4 6 58579 0.0306 0.4296 -0.15720 2019 4 7 58580 0.0319 0.4309 -0.15933 2019 4 8 58581 0.0332 0.4321 -0.16135 2019 4 9 58582 0.0345 0.4333 -0.16320 2019 4 10 58583 0.0358 0.4345 -0.16485 2019 4 11 58584 0.0372 0.4357 -0.16639 2019 4 12 58585 0.0385 0.4369 -0.16794 2019 4 13 58586 0.0399 0.4380 -0.16952 2019 4 14 58587 0.0413 0.4392 -0.17119 2019 4 15 58588 0.0428 0.4403 -0.17301 2019 4 16 58589 0.0442 0.4413 -0.17496 2019 4 17 58590 0.0457 0.4424 -0.17707 2019 4 18 58591 0.0472 0.4434 -0.17927 2019 4 19 58592 0.0487 0.4444 -0.18149 2019 4 20 58593 0.0503 0.4454 -0.18365 2019 4 21 58594 0.0518 0.4464 -0.18568 2019 4 22 58595 0.0534 0.4473 -0.18750 2019 4 23 58596 0.0550 0.4482 -0.18903 2019 4 24 58597 0.0566 0.4491 -0.19041 2019 4 25 58598 0.0583 0.4499 -0.19170 2019 4 26 58599 0.0599 0.4508 -0.19291 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) 58201 -103.40 0.07 -11.11 0.20 58202 -103.39 0.09 -11.19 0.20 58203 -103.09 0.09 -11.31 0.20 58204 -102.62 0.14 -11.38 0.23 58205 -102.20 0.14 -11.35 0.23 58206 -102.00 0.14 -11.32 0.23 58207 -102.02 0.14 -11.39 0.23 58208 -102.15 0.32 -11.56 0.16 58209 -102.26 0.32 -11.70 0.16 58210 -102.34 0.32 -11.69 0.16 58211 -102.47 0.32 -11.56 0.16 58212 -102.70 0.10 -11.44 0.20 58213 -103.00 0.10 -11.46 0.20 58214 -103.23 0.10 -11.61 0.20 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 58201 0.012 0.030 -0.192 0.196 58202 0.001 0.034 -0.195 0.204 58203 -0.010 0.034 -0.200 0.204 58204 -0.019 0.054 -0.206 0.231 58205 -0.027 0.054 -0.210 0.231 58206 -0.034 0.054 -0.213 0.231 58207 -0.038 0.054 -0.215 0.231 58208 -0.042 0.128 -0.215 0.160 58209 -0.044 0.128 -0.215 0.160 58210 -0.045 0.128 -0.214 0.160 58211 -0.046 0.128 -0.212 0.160 58212 -0.045 0.038 -0.209 0.201 58213 -0.045 0.038 -0.207 0.201 58214 -0.044 0.038 -0.204 0.201 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).