********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 23 January 2020 Vol. XXXIII No. 004 ______________________________________________________________________ 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 = -0.2 seconds beginning 02 May 2019 at 0000 UTC Beginning 1 January 2017: TAI-UTC = 37.000 000 seconds *********************************************************************** * * * Notice of Publication Web and FTP Shutdown: * * The US Naval Observatory's Rapid Service/Prediction Center web and * * FTP sites (at maia.usno.navy.mil and toshi.nofs.navy.mil) must * * undergo modernization and have been offline since 24 October 2019. * * The expected completion of work and return of service is estimated * * as 30 April 2020. Please visit https://www.usno.navy.mil and submit * * a Requirements Form to the USNO Public Affairs Official (PAO) if * * the information you are seeking is not accessible via another * * means. If the Requirements Form is not available, please directly * * contact the USNO PAO Geoff Chester at email address * * geoff.chester@navy.mil or phone number 202 762 1438. * * * * Although the Bulletin A makes several references to maia, one * * should note that the paragraph above supercedes any information * * that is contained in the Bulletin A text. Because some users mis- * * takenly use Bulletin A (ser7.dat) instead of other formats (such as * * finals2000A.daily) for operational, machine-to-machine uses, we * * do not wish to change the spacing or text of the files. In the * * past, when spacings had changed, users had stated that any change * * to the Bulletin format outside of this remarks area had broken * * their operations. Therefore, we have not removed the old references * * to maia within the text of the Bulletin A (ser7.dat file). * * * * This shutdown has lead to the indefinite cessation of IERS * * Bulletin A distribution emails. If this occurs, current * * subscribers to the Bulletin A email distribution list may receive * * future mailings from a different address (if this service is * * restored). In the meantime, we will be unable to process email * * subscription/unsubscription requests. * * * * Currently, updated EOPs may be available at NASA's Archive of * * Space Geodesy Data anonymous FTP server at: * * ftp://cddis.gsfc.nasa.gov/pub/products/iers * * Daily EOP data may be uploaded here by 18:00 UTC, and * * Bulletin A EOP data may be available by 20:00 UTC. * * Users should please verify results obtained from this site; * * we cannot guarantee the integrity or timeliness of files provided * * at this mirror site. * * * * For other download options from CDDIS, such as HTTPS, please refer * * to the https://cddis.nasa.gov/About/CDDIS_File_Download_FAQ.html * * * * In addition, updated EOPs may be available at IERS: * * https://datacenter.iers.org/eop.php * * EOP data files are uploaded directly from USNO to this site each * * day. For further information, contact the IERS directly. * * * * Questions and enquiries about EOPs can be emailed to the * * following address: * * usn.ncr.navobsydc.mbx.eopcp@mail.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 20 1 17 58865 0.05740 .00009 0.29664 .00009 -0.181761 0.000007 20 1 18 58866 0.05647 .00009 0.29766 .00009 -0.182784 0.000013 20 1 19 58867 0.05555 .00009 0.29855 .00009 -0.183750 0.000013 20 1 20 58868 0.05462 .00009 0.29942 .00009 -0.184605 0.000015 20 1 21 58869 0.05384 .00009 0.30024 .00009 -0.185284 0.000019 20 1 22 58870 0.05324 .00009 0.30121 .00009 -0.185789 0.000019 20 1 23 58871 0.05265 .00009 0.30246 .00009 -0.186167 0.000022 _______________________________________________________________________ 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 = 0.1209 - 0.0783 cos A - 0.0598 sin A + 0.0092 cos C + 0.0091 sin C y = 0.3469 - 0.0542 cos A + 0.0729 sin A + 0.0091 cos C - 0.0092 sin C UT1-UTC = -0.1857 - 0.00028 (MJD - 58879) - (UT2-UT1) where A = 2*pi*(MJD-58871)/365.25 and C = 2*pi*(MJD-58871)/435. TAI-UTC(MJD 58872) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58871)**0.80 S t = 0.00025 (MJD-58871)**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) 2020 1 24 58872 0.0519 0.3039 -0.18645 2020 1 25 58873 0.0512 0.3053 -0.18674 2020 1 26 58874 0.0503 0.3066 -0.18709 2020 1 27 58875 0.0494 0.3080 -0.18753 2020 1 28 58876 0.0486 0.3092 -0.18806 2020 1 29 58877 0.0477 0.3105 -0.18866 2020 1 30 58878 0.0469 0.3117 -0.18931 2020 1 31 58879 0.0461 0.3130 -0.18999 2020 2 1 58880 0.0454 0.3143 -0.19068 2020 2 2 58881 0.0448 0.3156 -0.19136 2020 2 3 58882 0.0441 0.3170 -0.19201 2020 2 4 58883 0.0434 0.3183 -0.19260 2020 2 5 58884 0.0427 0.3197 -0.19313 2020 2 6 58885 0.0420 0.3211 -0.19363 2020 2 7 58886 0.0414 0.3225 -0.19410 2020 2 8 58887 0.0407 0.3239 -0.19460 2020 2 9 58888 0.0402 0.3253 -0.19519 2020 2 10 58889 0.0396 0.3267 -0.19596 2020 2 11 58890 0.0391 0.3281 -0.19691 2020 2 12 58891 0.0386 0.3295 -0.19800 2020 2 13 58892 0.0382 0.3309 -0.19915 2020 2 14 58893 0.0378 0.3324 -0.20025 2020 2 15 58894 0.0374 0.3339 -0.20121 2020 2 16 58895 0.0370 0.3353 -0.20198 2020 2 17 58896 0.0366 0.3368 -0.20254 2020 2 18 58897 0.0363 0.3383 -0.20293 2020 2 19 58898 0.0360 0.3398 -0.20319 2020 2 20 58899 0.0357 0.3412 -0.20341 2020 2 21 58900 0.0355 0.3427 -0.20363 2020 2 22 58901 0.0353 0.3442 -0.20390 2020 2 23 58902 0.0351 0.3457 -0.20425 2020 2 24 58903 0.0350 0.3473 -0.20470 2020 2 25 58904 0.0349 0.3488 -0.20525 2020 2 26 58905 0.0348 0.3503 -0.20587 2020 2 27 58906 0.0347 0.3518 -0.20654 2020 2 28 58907 0.0347 0.3533 -0.20722 2020 2 29 58908 0.0347 0.3549 -0.20786 2020 3 1 58909 0.0348 0.3564 -0.20842 2020 3 2 58910 0.0348 0.3579 -0.20889 2020 3 3 58911 0.0349 0.3594 -0.20926 2020 3 4 58912 0.0350 0.3610 -0.20955 2020 3 5 58913 0.0352 0.3625 -0.20978 2020 3 6 58914 0.0354 0.3640 -0.21005 2020 3 7 58915 0.0356 0.3655 -0.21045 2020 3 8 58916 0.0358 0.3671 -0.21106 2020 3 9 58917 0.0361 0.3686 -0.21195 2020 3 10 58918 0.0364 0.3701 -0.21309 2020 3 11 58919 0.0367 0.3716 -0.21440 2020 3 12 58920 0.0371 0.3731 -0.21572 2020 3 13 58921 0.0375 0.3746 -0.21693 2020 3 14 58922 0.0379 0.3761 -0.21792 2020 3 15 58923 0.0384 0.3776 -0.21866 2020 3 16 58924 0.0388 0.3791 -0.21917 2020 3 17 58925 0.0394 0.3806 -0.21950 2020 3 18 58926 0.0399 0.3821 -0.21975 2020 3 19 58927 0.0405 0.3836 -0.21998 2020 3 20 58928 0.0411 0.3850 -0.22026 2020 3 21 58929 0.0417 0.3865 -0.22063 2020 3 22 58930 0.0423 0.3879 -0.22111 2020 3 23 58931 0.0430 0.3894 -0.22170 2020 3 24 58932 0.0437 0.3908 -0.22238 2020 3 25 58933 0.0444 0.3922 -0.22312 2020 3 26 58934 0.0452 0.3936 -0.22387 2020 3 27 58935 0.0460 0.3950 -0.22458 2020 3 28 58936 0.0468 0.3964 -0.22520 2020 3 29 58937 0.0477 0.3978 -0.22570 2020 3 30 58938 0.0485 0.3991 -0.22608 2020 3 31 58939 0.0494 0.4005 -0.22634 2020 4 1 58940 0.0503 0.4018 -0.22652 2020 4 2 58941 0.0513 0.4031 -0.22669 2020 4 3 58942 0.0523 0.4044 -0.22694 2020 4 4 58943 0.0533 0.4057 -0.22736 2020 4 5 58944 0.0543 0.4070 -0.22802 2020 4 6 58945 0.0553 0.4083 -0.22895 2020 4 7 58946 0.0564 0.4095 -0.23010 2020 4 8 58947 0.0575 0.4108 -0.23135 2020 4 9 58948 0.0586 0.4120 -0.23255 2020 4 10 58949 0.0598 0.4132 -0.23357 2020 4 11 58950 0.0610 0.4144 -0.23433 2020 4 12 58951 0.0622 0.4155 -0.23482 2020 4 13 58952 0.0634 0.4167 -0.23510 2020 4 14 58953 0.0646 0.4178 -0.23526 2020 4 15 58954 0.0659 0.4189 -0.23539 2020 4 16 58955 0.0671 0.4200 -0.23554 2020 4 17 58956 0.0684 0.4211 -0.23577 2020 4 18 58957 0.0698 0.4221 -0.23610 2020 4 19 58958 0.0711 0.4232 -0.23654 2020 4 20 58959 0.0725 0.4242 -0.23707 2020 4 21 58960 0.0739 0.4252 -0.23767 2020 4 22 58961 0.0753 0.4262 -0.23829 2020 4 23 58962 0.0767 0.4271 -0.23888 2020 4 24 58963 0.0781 0.4280 -0.23940 2020 4 25 58964 0.0796 0.4289 -0.23980 2020 4 26 58965 0.0811 0.4298 -0.24007 2020 4 27 58966 0.0825 0.4307 -0.24022 2020 4 28 58967 0.0841 0.4315 -0.24028 2020 4 29 58968 0.0856 0.4324 -0.24030 2020 4 30 58969 0.0871 0.4331 -0.24036 2020 5 1 58970 0.0887 0.4339 -0.24055 2020 5 2 58971 0.0903 0.4347 -0.24094 2020 5 3 58972 0.0918 0.4354 -0.24158 2020 5 4 58973 0.0934 0.4361 -0.24245 2020 5 5 58974 0.0951 0.4368 -0.24349 2020 5 6 58975 0.0967 0.4374 -0.24456 2020 5 7 58976 0.0983 0.4380 -0.24552 2020 5 8 58977 0.1000 0.4386 -0.24625 2020 5 9 58978 0.1016 0.4392 -0.24671 2020 5 10 58979 0.1033 0.4398 -0.24692 2020 5 11 58980 0.1050 0.4403 -0.24694 2020 5 12 58981 0.1067 0.4408 -0.24686 2020 5 13 58982 0.1084 0.4412 -0.24678 2020 5 14 58983 0.1101 0.4417 -0.24674 2020 5 15 58984 0.1118 0.4421 -0.24679 2020 5 16 58985 0.1136 0.4425 -0.24692 2020 5 17 58986 0.1153 0.4429 -0.24714 2020 5 18 58987 0.1170 0.4432 -0.24740 2020 5 19 58988 0.1188 0.4435 -0.24769 2020 5 20 58989 0.1205 0.4438 -0.24794 2020 5 21 58990 0.1223 0.4440 -0.24811 2020 5 22 58991 0.1241 0.4443 -0.24817 2020 5 23 58992 0.1259 0.4445 -0.24809 2020 5 24 58993 0.1276 0.4446 -0.24785 2020 5 25 58994 0.1294 0.4448 -0.24750 2020 5 26 58995 0.1312 0.4449 -0.24708 2020 5 27 58996 0.1330 0.4450 -0.24666 2020 5 28 58997 0.1348 0.4451 -0.24632 2020 5 29 58998 0.1366 0.4451 -0.24614 2020 5 30 58999 0.1383 0.4451 -0.24617 2020 5 31 59000 0.1401 0.4451 -0.24641 2020 6 1 59001 0.1419 0.4450 -0.24682 2020 6 2 59002 0.1437 0.4449 -0.24731 2020 6 3 59003 0.1455 0.4448 -0.24775 2020 6 4 59004 0.1473 0.4447 -0.24802 2020 6 5 59005 0.1491 0.4445 -0.24804 2020 6 6 59006 0.1508 0.4443 -0.24781 2020 6 7 59007 0.1526 0.4441 -0.24737 2020 6 8 59008 0.1544 0.4439 -0.24681 2020 6 9 59009 0.1562 0.4436 -0.24621 2020 6 10 59010 0.1579 0.4433 -0.24564 2020 6 11 59011 0.1597 0.4430 -0.24516 2020 6 12 59012 0.1614 0.4426 -0.24477 2020 6 13 59013 0.1632 0.4422 -0.24447 2020 6 14 59014 0.1649 0.4418 -0.24423 2020 6 15 59015 0.1666 0.4414 -0.24402 2020 6 16 59016 0.1683 0.4409 -0.24380 2020 6 17 59017 0.1701 0.4404 -0.24352 2020 6 18 59018 0.1718 0.4399 -0.24314 2020 6 19 59019 0.1734 0.4393 -0.24263 2020 6 20 59020 0.1751 0.4388 -0.24198 2020 6 21 59021 0.1768 0.4382 -0.24121 2020 6 22 59022 0.1785 0.4375 -0.24036 2020 6 23 59023 0.1801 0.4369 -0.23949 2020 6 24 59024 0.1817 0.4362 -0.23871 2020 6 25 59025 0.1834 0.4355 -0.23807 2020 6 26 59026 0.1850 0.4348 -0.23763 2020 6 27 59027 0.1866 0.4340 -0.23741 2020 6 28 59028 0.1881 0.4332 -0.23734 2020 6 29 59029 0.1897 0.4324 -0.23737 2020 6 30 59030 0.1913 0.4316 -0.23738 2020 7 1 59031 0.1928 0.4307 -0.23726 2020 7 2 59032 0.1943 0.4298 -0.23694 2020 7 3 59033 0.1958 0.4289 -0.23639 2020 7 4 59034 0.1973 0.4280 -0.23564 2020 7 5 59035 0.1988 0.4270 -0.23475 2020 7 6 59036 0.2002 0.4260 -0.23382 2020 7 7 59037 0.2016 0.4250 -0.23291 2020 7 8 59038 0.2030 0.4240 -0.23208 2020 7 9 59039 0.2044 0.4230 -0.23136 2020 7 10 59040 0.2058 0.4219 -0.23075 2020 7 11 59041 0.2071 0.4208 -0.23022 2020 7 12 59042 0.2085 0.4197 -0.22974 2020 7 13 59043 0.2098 0.4186 -0.22926 2020 7 14 59044 0.2111 0.4174 -0.22874 2020 7 15 59045 0.2123 0.4162 -0.22813 2020 7 16 59046 0.2136 0.4150 -0.22741 2020 7 17 59047 0.2148 0.4138 -0.22656 2020 7 18 59048 0.2160 0.4126 -0.22557 2020 7 19 59049 0.2172 0.4113 -0.22448 2020 7 20 59050 0.2183 0.4100 -0.22335 2020 7 21 59051 0.2194 0.4087 -0.22225 2020 7 22 59052 0.2205 0.4074 -0.22127 2020 7 23 59053 0.2216 0.4061 -0.22047 2020 7 24 59054 0.2226 0.4047 -0.21985 2020 7 25 59055 0.2237 0.4034 -0.21938 2020 7 26 59056 0.2247 0.4020 -0.21895 2020 7 27 59057 0.2256 0.4006 -0.21845 2020 7 28 59058 0.2266 0.3992 -0.21780 2020 7 29 59059 0.2275 0.3977 -0.21691 2020 7 30 59060 0.2284 0.3963 -0.21579 2020 7 31 59061 0.2293 0.3948 -0.21449 2020 8 1 59062 0.2301 0.3934 -0.21311 2020 8 2 59063 0.2309 0.3919 -0.21176 2020 8 3 59064 0.2317 0.3904 -0.21055 2020 8 4 59065 0.2324 0.3888 -0.20953 2020 8 5 59066 0.2331 0.3873 -0.20874 2020 8 6 59067 0.2338 0.3858 -0.20815 2020 8 7 59068 0.2345 0.3842 -0.20773 2020 8 8 59069 0.2351 0.3827 -0.20743 2020 8 9 59070 0.2357 0.3811 -0.20720 2020 8 10 59071 0.2363 0.3795 -0.20697 2020 8 11 59072 0.2368 0.3779 -0.20669 2020 8 12 59073 0.2374 0.3763 -0.20634 2020 8 13 59074 0.2378 0.3747 -0.20587 2020 8 14 59075 0.2383 0.3731 -0.20530 2020 8 15 59076 0.2387 0.3714 -0.20463 2020 8 16 59077 0.2391 0.3698 -0.20393 2020 8 17 59078 0.2395 0.3682 -0.20328 2020 8 18 59079 0.2398 0.3665 -0.20275 2020 8 19 59080 0.2401 0.3648 -0.20245 2020 8 20 59081 0.2404 0.3632 -0.20242 2020 8 21 59082 0.2406 0.3615 -0.20264 2020 8 22 59083 0.2408 0.3598 -0.20303 2020 8 23 59084 0.2410 0.3582 -0.20349 2020 8 24 59085 0.2411 0.3565 -0.20386 2020 8 25 59086 0.2412 0.3548 -0.20406 2020 8 26 59087 0.2413 0.3531 -0.20403 2020 8 27 59088 0.2413 0.3514 -0.20380 2020 8 28 59089 0.2413 0.3497 -0.20343 2020 8 29 59090 0.2413 0.3481 -0.20299 2020 8 30 59091 0.2413 0.3464 -0.20260 2020 8 31 59092 0.2412 0.3447 -0.20235 2020 9 1 59093 0.2410 0.3430 -0.20228 2020 9 2 59094 0.2409 0.3413 -0.20237 2020 9 3 59095 0.2407 0.3396 -0.20260 2020 9 4 59096 0.2405 0.3379 -0.20294 2020 9 5 59097 0.2403 0.3362 -0.20331 2020 9 6 59098 0.2400 0.3346 -0.20372 2020 9 7 59099 0.2397 0.3329 -0.20413 2020 9 8 59100 0.2393 0.3312 -0.20450 2020 9 9 59101 0.2389 0.3295 -0.20484 2020 9 10 59102 0.2385 0.3279 -0.20507 2020 9 11 59103 0.2381 0.3262 -0.20526 2020 9 12 59104 0.2376 0.3246 -0.20542 2020 9 13 59105 0.2371 0.3229 -0.20557 2020 9 14 59106 0.2366 0.3213 -0.20582 2020 9 15 59107 0.2360 0.3197 -0.20625 2020 9 16 59108 0.2354 0.3180 -0.20690 2020 9 17 59109 0.2348 0.3164 -0.20784 2020 9 18 59110 0.2342 0.3148 -0.20905 2020 9 19 59111 0.2335 0.3132 -0.21036 2020 9 20 59112 0.2328 0.3116 -0.21161 2020 9 21 59113 0.2320 0.3101 -0.21268 2020 9 22 59114 0.2312 0.3085 -0.21350 2020 9 23 59115 0.2304 0.3069 -0.21405 2020 9 24 59116 0.2296 0.3054 -0.21441 2020 9 25 59117 0.2287 0.3039 -0.21469 2020 9 26 59118 0.2278 0.3024 -0.21501 2020 9 27 59119 0.2269 0.3009 -0.21543 2020 9 28 59120 0.2260 0.2994 -0.21596 2020 9 29 59121 0.2250 0.2979 -0.21660 2020 9 30 59122 0.2240 0.2964 -0.21736 2020 10 1 59123 0.2229 0.2950 -0.21825 2020 10 2 59124 0.2219 0.2936 -0.21916 2020 10 3 59125 0.2208 0.2921 -0.22007 2020 10 4 59126 0.2197 0.2907 -0.22093 2020 10 5 59127 0.2185 0.2894 -0.22171 2020 10 6 59128 0.2174 0.2880 -0.22240 2020 10 7 59129 0.2162 0.2867 -0.22301 2020 10 8 59130 0.2149 0.2853 -0.22353 2020 10 9 59131 0.2137 0.2840 -0.22400 2020 10 10 59132 0.2124 0.2827 -0.22447 2020 10 11 59133 0.2111 0.2815 -0.22496 2020 10 12 59134 0.2098 0.2802 -0.22556 2020 10 13 59135 0.2085 0.2790 -0.22640 2020 10 14 59136 0.2071 0.2778 -0.22755 2020 10 15 59137 0.2057 0.2766 -0.22896 2020 10 16 59138 0.2043 0.2754 -0.23063 2020 10 17 59139 0.2029 0.2743 -0.23237 2020 10 18 59140 0.2014 0.2732 -0.23395 2020 10 19 59141 0.1999 0.2721 -0.23527 2020 10 20 59142 0.1984 0.2710 -0.23625 2020 10 21 59143 0.1969 0.2699 -0.23696 2020 10 22 59144 0.1954 0.2689 -0.23753 2020 10 23 59145 0.1938 0.2679 -0.23804 2020 10 24 59146 0.1922 0.2669 -0.23861 2020 10 25 59147 0.1906 0.2659 -0.23928 2020 10 26 59148 0.1890 0.2650 -0.24002 2020 10 27 59149 0.1874 0.2641 -0.24086 2020 10 28 59150 0.1857 0.2632 -0.24177 2020 10 29 59151 0.1841 0.2623 -0.24270 2020 10 30 59152 0.1824 0.2615 -0.24367 2020 10 31 59153 0.1807 0.2607 -0.24466 2020 11 1 59154 0.1790 0.2599 -0.24562 2020 11 2 59155 0.1772 0.2592 -0.24643 2020 11 3 59156 0.1755 0.2584 -0.24706 2020 11 4 59157 0.1737 0.2577 -0.24753 2020 11 5 59158 0.1720 0.2571 -0.24795 2020 11 6 59159 0.1702 0.2564 -0.24831 2020 11 7 59160 0.1684 0.2558 -0.24865 2020 11 8 59161 0.1666 0.2552 -0.24904 2020 11 9 59162 0.1648 0.2547 -0.24956 2020 11 10 59163 0.1629 0.2541 -0.25028 2020 11 11 59164 0.1611 0.2536 -0.25127 2020 11 12 59165 0.1592 0.2531 -0.25250 2020 11 13 59166 0.1574 0.2527 -0.25385 2020 11 14 59167 0.1555 0.2523 -0.25516 2020 11 15 59168 0.1536 0.2519 -0.25636 2020 11 16 59169 0.1517 0.2515 -0.25731 2020 11 17 59170 0.1499 0.2512 -0.25798 2020 11 18 59171 0.1480 0.2509 -0.25844 2020 11 19 59172 0.1460 0.2506 -0.25882 2020 11 20 59173 0.1441 0.2504 -0.25923 2020 11 21 59174 0.1422 0.2502 -0.25968 2020 11 22 59175 0.1403 0.2500 -0.26031 2020 11 23 59176 0.1384 0.2499 -0.26110 2020 11 24 59177 0.1365 0.2498 -0.26200 2020 11 25 59178 0.1345 0.2497 -0.26294 2020 11 26 59179 0.1326 0.2496 -0.26387 2020 11 27 59180 0.1307 0.2496 -0.26475 2020 11 28 59181 0.1287 0.2496 -0.26559 2020 11 29 59182 0.1268 0.2496 -0.26634 2020 11 30 59183 0.1249 0.2497 -0.26691 2020 12 1 59184 0.1229 0.2498 -0.26734 2020 12 2 59185 0.1210 0.2499 -0.26766 2020 12 3 59186 0.1191 0.2501 -0.26790 2020 12 4 59187 0.1172 0.2503 -0.26812 2020 12 5 59188 0.1152 0.2505 -0.26839 2020 12 6 59189 0.1133 0.2507 -0.26880 2020 12 7 59190 0.1114 0.2510 -0.26939 2020 12 8 59191 0.1095 0.2513 -0.27021 2020 12 9 59192 0.1076 0.2516 -0.27126 2020 12 10 59193 0.1057 0.2520 -0.27245 2020 12 11 59194 0.1038 0.2524 -0.27367 2020 12 12 59195 0.1019 0.2529 -0.27478 2020 12 13 59196 0.1001 0.2533 -0.27563 2020 12 14 59197 0.0982 0.2538 -0.27623 2020 12 15 59198 0.0963 0.2543 -0.27663 2020 12 16 59199 0.0945 0.2549 -0.27686 2020 12 17 59200 0.0926 0.2555 -0.27708 2020 12 18 59201 0.0908 0.2561 -0.27733 2020 12 19 59202 0.0890 0.2567 -0.27764 2020 12 20 59203 0.0872 0.2574 -0.27805 2020 12 21 59204 0.0854 0.2581 -0.27857 2020 12 22 59205 0.0836 0.2588 -0.27918 2020 12 23 59206 0.0818 0.2595 -0.27982 2020 12 24 59207 0.0801 0.2603 -0.28039 2020 12 25 59208 0.0784 0.2611 -0.28087 2020 12 26 59209 0.0766 0.2620 -0.28129 2020 12 27 59210 0.0749 0.2629 -0.28156 2020 12 28 59211 0.0732 0.2637 -0.28170 2020 12 29 59212 0.0716 0.2647 -0.28173 2020 12 30 59213 0.0699 0.2656 -0.28169 2020 12 31 59214 0.0683 0.2666 -0.28166 2021 1 1 59215 0.0666 0.2676 -0.28166 2021 1 2 59216 0.0650 0.2686 -0.28181 2021 1 3 59217 0.0634 0.2697 -0.28216 2021 1 4 59218 0.0619 0.2708 -0.28275 2021 1 5 59219 0.0603 0.2719 -0.28360 2021 1 6 59220 0.0588 0.2730 -0.28459 2021 1 7 59221 0.0573 0.2742 -0.28569 2021 1 8 59222 0.0558 0.2753 -0.28673 2021 1 9 59223 0.0543 0.2765 -0.28764 2021 1 10 59224 0.0529 0.2778 -0.28839 2021 1 11 59225 0.0515 0.2790 -0.28897 2021 1 12 59226 0.0501 0.2803 -0.28942 2021 1 13 59227 0.0487 0.2816 -0.28983 2021 1 14 59228 0.0474 0.2829 -0.29033 2021 1 15 59229 0.0460 0.2843 -0.29097 2021 1 16 59230 0.0448 0.2856 -0.29175 2021 1 17 59231 0.0435 0.2870 -0.29267 2021 1 18 59232 0.0422 0.2884 -0.29366 2021 1 19 59233 0.0410 0.2899 -0.29467 2021 1 20 59234 0.0398 0.2913 -0.29568 2021 1 21 59235 0.0386 0.2928 -0.29662 2021 1 22 59236 0.0375 0.2943 -0.29747 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) 58849 -108.58 0.88 -6.45 0.10 58850 -108.70 0.88 -6.53 0.10 58851 -108.74 0.88 -6.57 0.10 58852 -108.73 0.95 -6.47 0.13 58853 -108.79 0.95 -6.21 0.13 58854 -108.96 0.76 -5.89 0.13 58855 -109.19 0.52 -5.67 0.14 58856 -109.40 0.52 -5.68 0.14 58857 -109.55 0.52 -5.94 0.14 58858 -109.56 0.52 -6.32 0.14 58859 -109.32 0.52 -6.58 0.14 58860 -108.80 0.41 -6.57 0.06 58861 -108.22 0.41 -6.36 0.06 58862 -107.84 0.41 -6.16 0.06 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 58849 0.358 0.350 0.098 0.102 58850 0.351 0.350 0.110 0.102 58851 0.337 0.350 0.120 0.102 58852 0.317 0.379 0.128 0.129 58853 0.293 0.379 0.134 0.129 58854 0.265 0.301 0.137 0.134 58855 0.238 0.208 0.137 0.139 58856 0.214 0.208 0.134 0.139 58857 0.194 0.208 0.129 0.139 58858 0.179 0.208 0.121 0.139 58859 0.168 0.208 0.111 0.139 58860 0.160 0.164 0.100 0.063 58861 0.154 0.164 0.088 0.063 58862 0.149 0.164 0.075 0.063 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).