********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 24 May 2018 Vol. XXXI No. 021 ______________________________________________________________________ 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 * * * * If you wish to be a contributor to the IERS Conventions future * * editions, please go to the following web sites for more details: * * http://maia.usno.navy.mil/conventions/announcements/ * * call-for-contributors.php * * http://iers-conventions.obspm.fr/announcements/ * * call-for-contributors.php * * * * 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 5 18 58256 0.09398 .00009 0.44623 .00009 0.087227 0.000020 18 5 19 58257 0.09568 .00009 0.44687 .00009 0.086663 0.000020 18 5 20 58258 0.09702 .00009 0.44739 .00009 0.086060 0.000022 18 5 21 58259 0.09816 .00009 0.44765 .00009 0.085418 0.000020 18 5 22 58260 0.09935 .00009 0.44770 .00009 0.084650 0.000025 18 5 23 58261 0.10085 .00009 0.44774 .00009 0.083720 0.000024 18 5 24 58262 0.10254 .00009 0.44782 .00009 0.082669 0.000024 _______________________________________________________________________ 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 = 0.1111 - 0.0175 cos A + 0.1421 sin A + 0.0097 cos C - 0.0291 sin C y = 0.3427 + 0.1340 cos A + 0.0192 sin A - 0.0291 cos C - 0.0097 sin C UT1-UTC = 0.1227 - 0.00077 (MJD - 58270) - (UT2-UT1) where A = 2*pi*(MJD-58262)/365.25 and C = 2*pi*(MJD-58262)/435. TAI-UTC(MJD 58263) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58262)**0.80 S t = 0.00025 (MJD-58262)**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 5 25 58263 0.1043 0.4479 0.08160 2018 5 26 58264 0.1059 0.4480 0.08057 2018 5 27 58265 0.1076 0.4481 0.07963 2018 5 28 58266 0.1091 0.4483 0.07880 2018 5 29 58267 0.1107 0.4484 0.07811 2018 5 30 58268 0.1122 0.4485 0.07759 2018 5 31 58269 0.1138 0.4484 0.07722 2018 6 1 58270 0.1154 0.4483 0.07695 2018 6 2 58271 0.1170 0.4482 0.07673 2018 6 3 58272 0.1187 0.4480 0.07651 2018 6 4 58273 0.1203 0.4478 0.07624 2018 6 5 58274 0.1220 0.4476 0.07591 2018 6 6 58275 0.1237 0.4474 0.07550 2018 6 7 58276 0.1254 0.4472 0.07502 2018 6 8 58277 0.1270 0.4470 0.07447 2018 6 9 58278 0.1286 0.4468 0.07387 2018 6 10 58279 0.1302 0.4466 0.07326 2018 6 11 58280 0.1317 0.4463 0.07268 2018 6 12 58281 0.1333 0.4460 0.07220 2018 6 13 58282 0.1348 0.4456 0.07184 2018 6 14 58283 0.1364 0.4452 0.07161 2018 6 15 58284 0.1379 0.4448 0.07146 2018 6 16 58285 0.1395 0.4444 0.07133 2018 6 17 58286 0.1410 0.4439 0.07114 2018 6 18 58287 0.1425 0.4435 0.07085 2018 6 19 58288 0.1440 0.4430 0.07045 2018 6 20 58289 0.1455 0.4425 0.06998 2018 6 21 58290 0.1470 0.4419 0.06951 2018 6 22 58291 0.1484 0.4414 0.06909 2018 6 23 58292 0.1499 0.4408 0.06879 2018 6 24 58293 0.1514 0.4401 0.06864 2018 6 25 58294 0.1528 0.4395 0.06866 2018 6 26 58295 0.1542 0.4388 0.06886 2018 6 27 58296 0.1557 0.4381 0.06921 2018 6 28 58297 0.1571 0.4374 0.06967 2018 6 29 58298 0.1585 0.4367 0.07020 2018 6 30 58299 0.1599 0.4360 0.07075 2018 7 1 58300 0.1612 0.4352 0.07128 2018 7 2 58301 0.1626 0.4344 0.07174 2018 7 3 58302 0.1639 0.4336 0.07210 2018 7 4 58303 0.1652 0.4328 0.07236 2018 7 5 58304 0.1665 0.4319 0.07251 2018 7 6 58305 0.1678 0.4310 0.07258 2018 7 7 58306 0.1690 0.4301 0.07258 2018 7 8 58307 0.1703 0.4292 0.07257 2018 7 9 58308 0.1715 0.4283 0.07261 2018 7 10 58309 0.1727 0.4273 0.07274 2018 7 11 58310 0.1739 0.4263 0.07298 2018 7 12 58311 0.1751 0.4253 0.07331 2018 7 13 58312 0.1762 0.4243 0.07367 2018 7 14 58313 0.1774 0.4233 0.07399 2018 7 15 58314 0.1785 0.4222 0.07420 2018 7 16 58315 0.1796 0.4212 0.07428 2018 7 17 58316 0.1807 0.4201 0.07424 2018 7 18 58317 0.1817 0.4190 0.07417 2018 7 19 58318 0.1828 0.4179 0.07412 2018 7 20 58319 0.1838 0.4167 0.07416 2018 7 21 58320 0.1848 0.4156 0.07433 2018 7 22 58321 0.1857 0.4144 0.07466 2018 7 23 58322 0.1867 0.4132 0.07512 2018 7 24 58323 0.1876 0.4120 0.07570 2018 7 25 58324 0.1885 0.4108 0.07636 2018 7 26 58325 0.1894 0.4096 0.07706 2018 7 27 58326 0.1902 0.4083 0.07775 2018 7 28 58327 0.1910 0.4071 0.07839 2018 7 29 58328 0.1918 0.4058 0.07893 2018 7 30 58329 0.1926 0.4045 0.07935 2018 7 31 58330 0.1934 0.4032 0.07962 2018 8 1 58331 0.1941 0.4019 0.07975 2018 8 2 58332 0.1948 0.4006 0.07977 2018 8 3 58333 0.1955 0.3992 0.07972 2018 8 4 58334 0.1962 0.3979 0.07963 2018 8 5 58335 0.1968 0.3965 0.07955 2018 8 6 58336 0.1974 0.3952 0.07954 2018 8 7 58337 0.1980 0.3938 0.07961 2018 8 8 58338 0.1985 0.3924 0.07976 2018 8 9 58339 0.1990 0.3910 0.07996 2018 8 10 58340 0.1995 0.3896 0.08012 2018 8 11 58341 0.2000 0.3882 0.08017 2018 8 12 58342 0.2005 0.3868 0.08006 2018 8 13 58343 0.2009 0.3853 0.07979 2018 8 14 58344 0.2013 0.3839 0.07940 2018 8 15 58345 0.2016 0.3825 0.07898 2018 8 16 58346 0.2020 0.3810 0.07861 2018 8 17 58347 0.2023 0.3796 0.07836 2018 8 18 58348 0.2026 0.3781 0.07826 2018 8 19 58349 0.2028 0.3766 0.07831 2018 8 20 58350 0.2030 0.3752 0.07848 2018 8 21 58351 0.2032 0.3737 0.07875 2018 8 22 58352 0.2034 0.3722 0.07907 2018 8 23 58353 0.2036 0.3707 0.07939 2018 8 24 58354 0.2037 0.3692 0.07966 2018 8 25 58355 0.2038 0.3678 0.07984 2018 8 26 58356 0.2038 0.3663 0.07990 2018 8 27 58357 0.2039 0.3648 0.07981 2018 8 28 58358 0.2039 0.3633 0.07958 2018 8 29 58359 0.2038 0.3618 0.07922 2018 8 30 58360 0.2038 0.3603 0.07876 2018 8 31 58361 0.2037 0.3588 0.07826 2018 9 1 58362 0.2036 0.3573 0.07776 2018 9 2 58363 0.2035 0.3559 0.07731 2018 9 3 58364 0.2033 0.3544 0.07694 2018 9 4 58365 0.2031 0.3529 0.07664 2018 9 5 58366 0.2029 0.3514 0.07637 2018 9 6 58367 0.2026 0.3499 0.07609 2018 9 7 58368 0.2023 0.3485 0.07570 2018 9 8 58369 0.2020 0.3470 0.07515 2018 9 9 58370 0.2017 0.3455 0.07439 2018 9 10 58371 0.2014 0.3441 0.07350 2018 9 11 58372 0.2010 0.3426 0.07251 2018 9 12 58373 0.2006 0.3412 0.07152 2018 9 13 58374 0.2001 0.3397 0.07062 2018 9 14 58375 0.1996 0.3383 0.06987 2018 9 15 58376 0.1991 0.3368 0.06928 2018 9 16 58377 0.1986 0.3354 0.06884 2018 9 17 58378 0.1981 0.3340 0.06853 2018 9 18 58379 0.1975 0.3326 0.06829 2018 9 19 58380 0.1969 0.3312 0.06807 2018 9 20 58381 0.1963 0.3298 0.06783 2018 9 21 58382 0.1956 0.3284 0.06751 2018 9 22 58383 0.1949 0.3271 0.06709 2018 9 23 58384 0.1942 0.3257 0.06652 2018 9 24 58385 0.1935 0.3244 0.06582 2018 9 25 58386 0.1927 0.3230 0.06498 2018 9 26 58387 0.1919 0.3217 0.06404 2018 9 27 58388 0.1911 0.3204 0.06305 2018 9 28 58389 0.1903 0.3191 0.06206 2018 9 29 58390 0.1894 0.3178 0.06113 2018 9 30 58391 0.1886 0.3165 0.06030 2018 10 1 58392 0.1877 0.3153 0.05955 2018 10 2 58393 0.1867 0.3140 0.05888 2018 10 3 58394 0.1858 0.3128 0.05821 2018 10 4 58395 0.1848 0.3116 0.05748 2018 10 5 58396 0.1838 0.3104 0.05662 2018 10 6 58397 0.1828 0.3092 0.05558 2018 10 7 58398 0.1817 0.3080 0.05435 2018 10 8 58399 0.1807 0.3068 0.05300 2018 10 9 58400 0.1796 0.3057 0.05159 2018 10 10 58401 0.1785 0.3046 0.05022 2018 10 11 58402 0.1774 0.3035 0.04898 2018 10 12 58403 0.1762 0.3024 0.04791 2018 10 13 58404 0.1750 0.3013 0.04700 2018 10 14 58405 0.1738 0.3003 0.04625 2018 10 15 58406 0.1726 0.2992 0.04561 2018 10 16 58407 0.1714 0.2982 0.04503 2018 10 17 58408 0.1702 0.2972 0.04446 2018 10 18 58409 0.1689 0.2962 0.04384 2018 10 19 58410 0.1676 0.2953 0.04313 2018 10 20 58411 0.1663 0.2943 0.04230 2018 10 21 58412 0.1650 0.2934 0.04134 2018 10 22 58413 0.1636 0.2925 0.04024 2018 10 23 58414 0.1623 0.2917 0.03904 2018 10 24 58415 0.1609 0.2908 0.03777 2018 10 25 58416 0.1595 0.2900 0.03649 2018 10 26 58417 0.1581 0.2892 0.03526 2018 10 27 58418 0.1567 0.2884 0.03414 2018 10 28 58419 0.1553 0.2876 0.03314 2018 10 29 58420 0.1538 0.2869 0.03224 2018 10 30 58421 0.1524 0.2862 0.03139 2018 10 31 58422 0.1509 0.2855 0.03052 2018 11 1 58423 0.1494 0.2848 0.02956 2018 11 2 58424 0.1479 0.2841 0.02845 2018 11 3 58425 0.1464 0.2835 0.02719 2018 11 4 58426 0.1449 0.2829 0.02579 2018 11 5 58427 0.1434 0.2823 0.02432 2018 11 6 58428 0.1418 0.2818 0.02285 2018 11 7 58429 0.1403 0.2812 0.02148 2018 11 8 58430 0.1387 0.2807 0.02025 2018 11 9 58431 0.1371 0.2803 0.01920 2018 11 10 58432 0.1355 0.2798 0.01831 2018 11 11 58433 0.1339 0.2794 0.01757 2018 11 12 58434 0.1323 0.2790 0.01691 2018 11 13 58435 0.1307 0.2786 0.01629 2018 11 14 58436 0.1291 0.2782 0.01566 2018 11 15 58437 0.1275 0.2779 0.01496 2018 11 16 58438 0.1259 0.2776 0.01417 2018 11 17 58439 0.1242 0.2773 0.01325 2018 11 18 58440 0.1226 0.2771 0.01222 2018 11 19 58441 0.1210 0.2768 0.01107 2018 11 20 58442 0.1193 0.2766 0.00984 2018 11 21 58443 0.1177 0.2765 0.00858 2018 11 22 58444 0.1160 0.2763 0.00735 2018 11 23 58445 0.1144 0.2762 0.00620 2018 11 24 58446 0.1127 0.2761 0.00518 2018 11 25 58447 0.1110 0.2760 0.00429 2018 11 26 58448 0.1094 0.2760 0.00349 2018 11 27 58449 0.1077 0.2760 0.00271 2018 11 28 58450 0.1061 0.2760 0.00186 2018 11 29 58451 0.1044 0.2760 0.00089 2018 11 30 58452 0.1027 0.2761 -0.00023 2018 12 1 58453 0.1011 0.2762 -0.00147 2018 12 2 58454 0.0994 0.2763 -0.00279 2018 12 3 58455 0.0978 0.2764 -0.00414 2018 12 4 58456 0.0961 0.2766 -0.00544 2018 12 5 58457 0.0945 0.2768 -0.00665 2018 12 6 58458 0.0928 0.2770 -0.00773 2018 12 7 58459 0.0912 0.2773 -0.00867 2018 12 8 58460 0.0895 0.2775 -0.00948 2018 12 9 58461 0.0879 0.2778 -0.01018 2018 12 10 58462 0.0863 0.2781 -0.01080 2018 12 11 58463 0.0847 0.2785 -0.01140 2018 12 12 58464 0.0831 0.2789 -0.01202 2018 12 13 58465 0.0815 0.2793 -0.01269 2018 12 14 58466 0.0799 0.2797 -0.01345 2018 12 15 58467 0.0783 0.2802 -0.01433 2018 12 16 58468 0.0767 0.2806 -0.01531 2018 12 17 58469 0.0751 0.2811 -0.01640 2018 12 18 58470 0.0736 0.2817 -0.01756 2018 12 19 58471 0.0720 0.2822 -0.01874 2018 12 20 58472 0.0705 0.2828 -0.01986 2018 12 21 58473 0.0689 0.2834 -0.02088 2018 12 22 58474 0.0674 0.2840 -0.02174 2018 12 23 58475 0.0659 0.2847 -0.02248 2018 12 24 58476 0.0644 0.2854 -0.02315 2018 12 25 58477 0.0629 0.2861 -0.02384 2018 12 26 58478 0.0615 0.2868 -0.02464 2018 12 27 58479 0.0600 0.2875 -0.02559 2018 12 28 58480 0.0586 0.2883 -0.02667 2018 12 29 58481 0.0571 0.2891 -0.02781 2018 12 30 58482 0.0557 0.2899 -0.02895 2018 12 31 58483 0.0543 0.2908 -0.03001 2019 1 1 58484 0.0530 0.2916 -0.03095 2019 1 2 58485 0.0516 0.2925 -0.03179 2019 1 3 58486 0.0503 0.2934 -0.03249 2019 1 4 58487 0.0489 0.2943 -0.03305 2019 1 5 58488 0.0476 0.2953 -0.03354 2019 1 6 58489 0.0463 0.2963 -0.03397 2019 1 7 58490 0.0450 0.2973 -0.03438 2019 1 8 58491 0.0438 0.2983 -0.03486 2019 1 9 58492 0.0426 0.2993 -0.03545 2019 1 10 58493 0.0413 0.3004 -0.03610 2019 1 11 58494 0.0401 0.3014 -0.03686 2019 1 12 58495 0.0390 0.3025 -0.03773 2019 1 13 58496 0.0378 0.3036 -0.03865 2019 1 14 58497 0.0367 0.3048 -0.03960 2019 1 15 58498 0.0356 0.3059 -0.04053 2019 1 16 58499 0.0345 0.3071 -0.04138 2019 1 17 58500 0.0334 0.3083 -0.04214 2019 1 18 58501 0.0323 0.3095 -0.04280 2019 1 19 58502 0.0313 0.3107 -0.04332 2019 1 20 58503 0.0303 0.3119 -0.04377 2019 1 21 58504 0.0293 0.3132 -0.04421 2019 1 22 58505 0.0284 0.3144 -0.04478 2019 1 23 58506 0.0274 0.3157 -0.04554 2019 1 24 58507 0.0265 0.3170 -0.04648 2019 1 25 58508 0.0256 0.3183 -0.04751 2019 1 26 58509 0.0248 0.3197 -0.04858 2019 1 27 58510 0.0240 0.3210 -0.04960 2019 1 28 58511 0.0231 0.3223 -0.05047 2019 1 29 58512 0.0224 0.3237 -0.05123 2019 1 30 58513 0.0216 0.3251 -0.05187 2019 1 31 58514 0.0209 0.3265 -0.05251 2019 2 1 58515 0.0202 0.3279 -0.05308 2019 2 2 58516 0.0195 0.3293 -0.05361 2019 2 3 58517 0.0188 0.3307 -0.05404 2019 2 4 58518 0.0182 0.3322 -0.05448 2019 2 5 58519 0.0176 0.3336 -0.05496 2019 2 6 58520 0.0170 0.3351 -0.05558 2019 2 7 58521 0.0165 0.3366 -0.05636 2019 2 8 58522 0.0160 0.3380 -0.05727 2019 2 9 58523 0.0155 0.3395 -0.05832 2019 2 10 58524 0.0150 0.3410 -0.05944 2019 2 11 58525 0.0146 0.3425 -0.06064 2019 2 12 58526 0.0142 0.3440 -0.06187 2019 2 13 58527 0.0138 0.3455 -0.06303 2019 2 14 58528 0.0135 0.3471 -0.06408 2019 2 15 58529 0.0131 0.3486 -0.06497 2019 2 16 58530 0.0129 0.3501 -0.06584 2019 2 17 58531 0.0126 0.3517 -0.06670 2019 2 18 58532 0.0124 0.3532 -0.06767 2019 2 19 58533 0.0122 0.3548 -0.06883 2019 2 20 58534 0.0120 0.3563 -0.07021 2019 2 21 58535 0.0118 0.3579 -0.07179 2019 2 22 58536 0.0117 0.3594 -0.07346 2019 2 23 58537 0.0116 0.3610 -0.07513 2019 2 24 58538 0.0116 0.3626 -0.07670 2019 2 25 58539 0.0115 0.3641 -0.07807 2019 2 26 58540 0.0115 0.3657 -0.07923 2019 2 27 58541 0.0116 0.3673 -0.08020 2019 2 28 58542 0.0116 0.3688 -0.08108 2019 3 1 58543 0.0117 0.3704 -0.08191 2019 3 2 58544 0.0118 0.3719 -0.08269 2019 3 3 58545 0.0120 0.3735 -0.08343 2019 3 4 58546 0.0122 0.3751 -0.08425 2019 3 5 58547 0.0124 0.3766 -0.08513 2019 3 6 58548 0.0126 0.3782 -0.08610 2019 3 7 58549 0.0129 0.3797 -0.08721 2019 3 8 58550 0.0132 0.3813 -0.08845 2019 3 9 58551 0.0135 0.3828 -0.08981 2019 3 10 58552 0.0138 0.3844 -0.09113 2019 3 11 58553 0.0142 0.3859 -0.09249 2019 3 12 58554 0.0146 0.3874 -0.09387 2019 3 13 58555 0.0151 0.3889 -0.09514 2019 3 14 58556 0.0155 0.3905 -0.09631 2019 3 15 58557 0.0160 0.3920 -0.09746 2019 3 16 58558 0.0166 0.3935 -0.09857 2019 3 17 58559 0.0171 0.3950 -0.09977 2019 3 18 58560 0.0177 0.3964 -0.10116 2019 3 19 58561 0.0183 0.3979 -0.10277 2019 3 20 58562 0.0189 0.3994 -0.10465 2019 3 21 58563 0.0196 0.4008 -0.10673 2019 3 22 58564 0.0203 0.4023 -0.10895 2019 3 23 58565 0.0210 0.4037 -0.11114 2019 3 24 58566 0.0217 0.4051 -0.11318 2019 3 25 58567 0.0225 0.4065 -0.11502 2019 3 26 58568 0.0233 0.4079 -0.11667 2019 3 27 58569 0.0241 0.4093 -0.11818 2019 3 28 58570 0.0250 0.4107 -0.11963 2019 3 29 58571 0.0259 0.4121 -0.12098 2019 3 30 58572 0.0268 0.4134 -0.12230 2019 3 31 58573 0.0277 0.4148 -0.12367 2019 4 1 58574 0.0286 0.4161 -0.12513 2019 4 2 58575 0.0296 0.4174 -0.12673 2019 4 3 58576 0.0306 0.4187 -0.12848 2019 4 4 58577 0.0316 0.4199 -0.13036 2019 4 5 58578 0.0327 0.4212 -0.13229 2019 4 6 58579 0.0337 0.4224 -0.13427 2019 4 7 58580 0.0348 0.4237 -0.13619 2019 4 8 58581 0.0360 0.4249 -0.13798 2019 4 9 58582 0.0371 0.4261 -0.13961 2019 4 10 58583 0.0383 0.4272 -0.14113 2019 4 11 58584 0.0394 0.4284 -0.14255 2019 4 12 58585 0.0406 0.4295 -0.14395 2019 4 13 58586 0.0419 0.4306 -0.14537 2019 4 14 58587 0.0431 0.4317 -0.14679 2019 4 15 58588 0.0444 0.4328 -0.14840 2019 4 16 58589 0.0457 0.4339 -0.15017 2019 4 17 58590 0.0470 0.4349 -0.15213 2019 4 18 58591 0.0483 0.4359 -0.15430 2019 4 19 58592 0.0497 0.4369 -0.15657 2019 4 20 58593 0.0510 0.4379 -0.15878 2019 4 21 58594 0.0524 0.4388 -0.16083 2019 4 22 58595 0.0538 0.4398 -0.16268 2019 4 23 58596 0.0552 0.4407 -0.16425 2019 4 24 58597 0.0567 0.4416 -0.16563 2019 4 25 58598 0.0581 0.4424 -0.16692 2019 4 26 58599 0.0596 0.4433 -0.16813 2019 4 27 58600 0.0611 0.4441 -0.16930 2019 4 28 58601 0.0626 0.4449 -0.17052 2019 4 29 58602 0.0641 0.4456 -0.17179 2019 4 30 58603 0.0656 0.4464 -0.17315 2019 5 1 58604 0.0671 0.4471 -0.17466 2019 5 2 58605 0.0687 0.4478 -0.17624 2019 5 3 58606 0.0703 0.4485 -0.17778 2019 5 4 58607 0.0718 0.4491 -0.17930 2019 5 5 58608 0.0734 0.4497 -0.18080 2019 5 6 58609 0.0750 0.4503 -0.18220 2019 5 7 58610 0.0767 0.4509 -0.18345 2019 5 8 58611 0.0783 0.4514 -0.18455 2019 5 9 58612 0.0799 0.4519 -0.18553 2019 5 10 58613 0.0816 0.4524 -0.18645 2019 5 11 58614 0.0832 0.4529 -0.18743 2019 5 12 58615 0.0849 0.4533 -0.18855 2019 5 13 58616 0.0866 0.4537 -0.18985 2019 5 14 58617 0.0882 0.4541 -0.19122 2019 5 15 58618 0.0899 0.4545 -0.19275 2019 5 16 58619 0.0916 0.4548 -0.19437 2019 5 17 58620 0.0933 0.4551 -0.19593 2019 5 18 58621 0.0950 0.4554 -0.19740 2019 5 19 58622 0.0967 0.4556 -0.19869 2019 5 20 58623 0.0984 0.4559 -0.19975 2019 5 21 58624 0.1002 0.4561 -0.20066 2019 5 22 58625 0.1019 0.4562 -0.20149 2019 5 23 58626 0.1036 0.4564 -0.20223 2019 5 24 58627 0.1053 0.4565 -0.20296 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) 58236 -102.05 0.31 -11.90 0.11 58237 -102.38 0.31 -11.92 0.11 58238 -102.52 0.31 -11.88 0.11 58239 -102.56 0.35 -11.82 0.16 58240 -102.66 0.22 -11.81 0.13 58241 -102.84 0.22 -11.89 0.13 58242 -102.99 0.22 -12.04 0.13 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 58236 -0.116 0.122 -0.015 0.112 58237 -0.124 0.122 -0.018 0.112 58238 -0.127 0.122 -0.032 0.112 58239 -0.125 0.140 -0.051 0.162 58240 -0.120 0.087 -0.075 0.131 58241 -0.112 0.087 -0.100 0.131 58242 -0.102 0.087 -0.125 0.131 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).