********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 20 February 2020 Vol. XXXIII No. 008 ______________________________________________________________________ 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 2 14 58893 0.03642 .00009 0.33183 .00009 -0.197417 0.000019 20 2 15 58894 0.03490 .00009 0.33311 .00009 -0.198115 0.000020 20 2 16 58895 0.03311 .00009 0.33402 .00009 -0.198630 0.000022 20 2 17 58896 0.03162 .00009 0.33491 .00009 -0.198930 0.000013 20 2 18 58897 0.03071 .00009 0.33610 .00009 -0.199053 0.000015 20 2 19 58898 0.03020 .00009 0.33758 .00009 -0.199100 0.000013 20 2 20 58899 0.02965 .00009 0.33901 .00009 -0.199154 0.000012 _______________________________________________________________________ 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 = 0.1153 - 0.0936 cos A - 0.0220 sin A + 0.0049 cos C + 0.0070 sin C y = 0.3508 - 0.0196 cos A + 0.0843 sin A + 0.0070 cos C - 0.0049 sin C UT1-UTC = -0.1971 - 0.00023 (MJD - 58907) - (UT2-UT1) where A = 2*pi*(MJD-58899)/365.25 and C = 2*pi*(MJD-58899)/435. TAI-UTC(MJD 58900) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58899)**0.80 S t = 0.00025 (MJD-58899)**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 2 21 58900 0.0292 0.3404 -0.19931 2020 2 22 58901 0.0287 0.3417 -0.19962 2020 2 23 58902 0.0282 0.3430 -0.20010 2020 2 24 58903 0.0278 0.3444 -0.20070 2020 2 25 58904 0.0274 0.3458 -0.20138 2020 2 26 58905 0.0272 0.3472 -0.20214 2020 2 27 58906 0.0270 0.3486 -0.20294 2020 2 28 58907 0.0269 0.3501 -0.20375 2020 2 29 58908 0.0268 0.3516 -0.20452 2020 3 1 58909 0.0268 0.3530 -0.20524 2020 3 2 58910 0.0268 0.3546 -0.20590 2020 3 3 58911 0.0269 0.3561 -0.20644 2020 3 4 58912 0.0269 0.3577 -0.20684 2020 3 5 58913 0.0271 0.3593 -0.20714 2020 3 6 58914 0.0272 0.3609 -0.20743 2020 3 7 58915 0.0274 0.3625 -0.20783 2020 3 8 58916 0.0276 0.3641 -0.20847 2020 3 9 58917 0.0278 0.3657 -0.20939 2020 3 10 58918 0.0281 0.3673 -0.21056 2020 3 11 58919 0.0284 0.3689 -0.21191 2020 3 12 58920 0.0287 0.3705 -0.21330 2020 3 13 58921 0.0291 0.3721 -0.21459 2020 3 14 58922 0.0295 0.3737 -0.21569 2020 3 15 58923 0.0299 0.3753 -0.21659 2020 3 16 58924 0.0304 0.3769 -0.21730 2020 3 17 58925 0.0309 0.3785 -0.21789 2020 3 18 58926 0.0314 0.3801 -0.21842 2020 3 19 58927 0.0319 0.3816 -0.21898 2020 3 20 58928 0.0325 0.3832 -0.21961 2020 3 21 58929 0.0331 0.3847 -0.22033 2020 3 22 58930 0.0337 0.3863 -0.22114 2020 3 23 58931 0.0344 0.3878 -0.22205 2020 3 24 58932 0.0351 0.3893 -0.22302 2020 3 25 58933 0.0358 0.3908 -0.22403 2020 3 26 58934 0.0366 0.3923 -0.22504 2020 3 27 58935 0.0374 0.3938 -0.22601 2020 3 28 58936 0.0382 0.3953 -0.22691 2020 3 29 58937 0.0390 0.3967 -0.22771 2020 3 30 58938 0.0399 0.3982 -0.22839 2020 3 31 58939 0.0408 0.3996 -0.22897 2020 4 1 58940 0.0418 0.4010 -0.22949 2020 4 2 58941 0.0427 0.4024 -0.22999 2020 4 3 58942 0.0437 0.4038 -0.23057 2020 4 4 58943 0.0447 0.4052 -0.23130 2020 4 5 58944 0.0458 0.4066 -0.23227 2020 4 6 58945 0.0468 0.4079 -0.23349 2020 4 7 58946 0.0479 0.4092 -0.23492 2020 4 8 58947 0.0491 0.4105 -0.23644 2020 4 9 58948 0.0502 0.4118 -0.23790 2020 4 10 58949 0.0514 0.4131 -0.23917 2020 4 11 58950 0.0526 0.4144 -0.24017 2020 4 12 58951 0.0538 0.4156 -0.24090 2020 4 13 58952 0.0551 0.4169 -0.24141 2020 4 14 58953 0.0563 0.4181 -0.24178 2020 4 15 58954 0.0576 0.4192 -0.24210 2020 4 16 58955 0.0590 0.4204 -0.24244 2020 4 17 58956 0.0603 0.4216 -0.24283 2020 4 18 58957 0.0617 0.4227 -0.24332 2020 4 19 58958 0.0631 0.4238 -0.24390 2020 4 20 58959 0.0645 0.4249 -0.24456 2020 4 21 58960 0.0659 0.4259 -0.24528 2020 4 22 58961 0.0674 0.4270 -0.24601 2020 4 23 58962 0.0688 0.4280 -0.24671 2020 4 24 58963 0.0703 0.4290 -0.24733 2020 4 25 58964 0.0718 0.4300 -0.24783 2020 4 26 58965 0.0734 0.4309 -0.24818 2020 4 27 58966 0.0749 0.4319 -0.24841 2020 4 28 58967 0.0765 0.4328 -0.24852 2020 4 29 58968 0.0781 0.4336 -0.24858 2020 4 30 58969 0.0797 0.4345 -0.24867 2020 5 1 58970 0.0813 0.4353 -0.24886 2020 5 2 58971 0.0829 0.4361 -0.24925 2020 5 3 58972 0.0846 0.4369 -0.24988 2020 5 4 58973 0.0863 0.4377 -0.25073 2020 5 5 58974 0.0880 0.4384 -0.25174 2020 5 6 58975 0.0897 0.4391 -0.25278 2020 5 7 58976 0.0914 0.4398 -0.25369 2020 5 8 58977 0.0931 0.4404 -0.25437 2020 5 9 58978 0.0948 0.4411 -0.25475 2020 5 10 58979 0.0966 0.4417 -0.25487 2020 5 11 58980 0.0983 0.4422 -0.25480 2020 5 12 58981 0.1001 0.4428 -0.25462 2020 5 13 58982 0.1019 0.4433 -0.25442 2020 5 14 58983 0.1037 0.4438 -0.25427 2020 5 15 58984 0.1055 0.4443 -0.25419 2020 5 16 58985 0.1073 0.4447 -0.25420 2020 5 17 58986 0.1091 0.4451 -0.25429 2020 5 18 58987 0.1110 0.4455 -0.25442 2020 5 19 58988 0.1128 0.4458 -0.25457 2020 5 20 58989 0.1147 0.4461 -0.25468 2020 5 21 58990 0.1165 0.4464 -0.25472 2020 5 22 58991 0.1184 0.4467 -0.25464 2020 5 23 58992 0.1202 0.4469 -0.25442 2020 5 24 58993 0.1221 0.4471 -0.25405 2020 5 25 58994 0.1240 0.4473 -0.25358 2020 5 26 58995 0.1258 0.4475 -0.25303 2020 5 27 58996 0.1277 0.4476 -0.25250 2020 5 28 58997 0.1296 0.4477 -0.25205 2020 5 29 58998 0.1315 0.4477 -0.25177 2020 5 30 58999 0.1334 0.4478 -0.25169 2020 5 31 59000 0.1352 0.4478 -0.25183 2020 6 1 59001 0.1371 0.4477 -0.25215 2020 6 2 59002 0.1390 0.4477 -0.25254 2020 6 3 59003 0.1409 0.4476 -0.25288 2020 6 4 59004 0.1428 0.4475 -0.25305 2020 6 5 59005 0.1447 0.4473 -0.25298 2020 6 6 59006 0.1465 0.4472 -0.25266 2020 6 7 59007 0.1484 0.4470 -0.25213 2020 6 8 59008 0.1503 0.4467 -0.25153 2020 6 9 59009 0.1522 0.4465 -0.25089 2020 6 10 59010 0.1540 0.4462 -0.25028 2020 6 11 59011 0.1559 0.4459 -0.24975 2020 6 12 59012 0.1577 0.4455 -0.24931 2020 6 13 59013 0.1596 0.4451 -0.24896 2020 6 14 59014 0.1614 0.4447 -0.24868 2020 6 15 59015 0.1632 0.4443 -0.24842 2020 6 16 59016 0.1651 0.4438 -0.24815 2020 6 17 59017 0.1669 0.4433 -0.24783 2020 6 18 59018 0.1687 0.4428 -0.24740 2020 6 19 59019 0.1705 0.4423 -0.24684 2020 6 20 59020 0.1722 0.4417 -0.24615 2020 6 21 59021 0.1740 0.4411 -0.24533 2020 6 22 59022 0.1758 0.4405 -0.24443 2020 6 23 59023 0.1775 0.4398 -0.24352 2020 6 24 59024 0.1793 0.4391 -0.24268 2020 6 25 59025 0.1810 0.4384 -0.24199 2020 6 26 59026 0.1827 0.4377 -0.24149 2020 6 27 59027 0.1844 0.4369 -0.24121 2020 6 28 59028 0.1860 0.4361 -0.24109 2020 6 29 59029 0.1877 0.4353 -0.24105 2020 6 30 59030 0.1894 0.4344 -0.24099 2020 7 1 59031 0.1910 0.4336 -0.24081 2020 7 2 59032 0.1926 0.4327 -0.24042 2020 7 3 59033 0.1942 0.4317 -0.23981 2020 7 4 59034 0.1958 0.4308 -0.23899 2020 7 5 59035 0.1973 0.4298 -0.23803 2020 7 6 59036 0.1989 0.4288 -0.23702 2020 7 7 59037 0.2004 0.4278 -0.23603 2020 7 8 59038 0.2019 0.4267 -0.23513 2020 7 9 59039 0.2034 0.4257 -0.23434 2020 7 10 59040 0.2048 0.4246 -0.23365 2020 7 11 59041 0.2063 0.4235 -0.23304 2020 7 12 59042 0.2077 0.4223 -0.23249 2020 7 13 59043 0.2091 0.4211 -0.23194 2020 7 14 59044 0.2105 0.4200 -0.23135 2020 7 15 59045 0.2118 0.4188 -0.23069 2020 7 16 59046 0.2132 0.4175 -0.22992 2020 7 17 59047 0.2145 0.4163 -0.22902 2020 7 18 59048 0.2157 0.4150 -0.22801 2020 7 19 59049 0.2170 0.4137 -0.22691 2020 7 20 59050 0.2182 0.4124 -0.22580 2020 7 21 59051 0.2194 0.4111 -0.22474 2020 7 22 59052 0.2206 0.4097 -0.22385 2020 7 23 59053 0.2218 0.4084 -0.22317 2020 7 24 59054 0.2229 0.4070 -0.22273 2020 7 25 59055 0.2240 0.4056 -0.22248 2020 7 26 59056 0.2251 0.4041 -0.22234 2020 7 27 59057 0.2261 0.4027 -0.22220 2020 7 28 59058 0.2271 0.4012 -0.22196 2020 7 29 59059 0.2281 0.3998 -0.22153 2020 7 30 59060 0.2291 0.3983 -0.22090 2020 7 31 59061 0.2300 0.3968 -0.22007 2020 8 1 59062 0.2309 0.3952 -0.21912 2020 8 2 59063 0.2318 0.3937 -0.21810 2020 8 3 59064 0.2327 0.3922 -0.21712 2020 8 4 59065 0.2335 0.3906 -0.21622 2020 8 5 59066 0.2343 0.3890 -0.21545 2020 8 6 59067 0.2350 0.3874 -0.21481 2020 8 7 59068 0.2357 0.3858 -0.21427 2020 8 8 59069 0.2364 0.3842 -0.21382 2020 8 9 59070 0.2371 0.3826 -0.21339 2020 8 10 59071 0.2377 0.3810 -0.21295 2020 8 11 59072 0.2383 0.3793 -0.21245 2020 8 12 59073 0.2389 0.3777 -0.21185 2020 8 13 59074 0.2394 0.3760 -0.21114 2020 8 14 59075 0.2399 0.3743 -0.21032 2020 8 15 59076 0.2404 0.3726 -0.20940 2020 8 16 59077 0.2409 0.3709 -0.20844 2020 8 17 59078 0.2413 0.3692 -0.20751 2020 8 18 59079 0.2416 0.3675 -0.20670 2020 8 19 59080 0.2420 0.3658 -0.20608 2020 8 20 59081 0.2423 0.3641 -0.20570 2020 8 21 59082 0.2426 0.3624 -0.20553 2020 8 22 59083 0.2428 0.3607 -0.20546 2020 8 23 59084 0.2430 0.3589 -0.20536 2020 8 24 59085 0.2432 0.3572 -0.20511 2020 8 25 59086 0.2433 0.3554 -0.20459 2020 8 26 59087 0.2434 0.3537 -0.20379 2020 8 27 59088 0.2435 0.3520 -0.20272 2020 8 28 59089 0.2436 0.3502 -0.20147 2020 8 29 59090 0.2436 0.3485 -0.20016 2020 8 30 59091 0.2435 0.3467 -0.19890 2020 8 31 59092 0.2435 0.3450 -0.19779 2020 9 1 59093 0.2434 0.3432 -0.19690 2020 9 2 59094 0.2433 0.3415 -0.19625 2020 9 3 59095 0.2431 0.3397 -0.19583 2020 9 4 59096 0.2429 0.3380 -0.19560 2020 9 5 59097 0.2427 0.3362 -0.19552 2020 9 6 59098 0.2424 0.3345 -0.19552 2020 9 7 59099 0.2421 0.3327 -0.19553 2020 9 8 59100 0.2418 0.3310 -0.19550 2020 9 9 59101 0.2414 0.3293 -0.19540 2020 9 10 59102 0.2411 0.3276 -0.19521 2020 9 11 59103 0.2406 0.3258 -0.19495 2020 9 12 59104 0.2402 0.3241 -0.19465 2020 9 13 59105 0.2397 0.3224 -0.19439 2020 9 14 59106 0.2391 0.3207 -0.19424 2020 9 15 59107 0.2386 0.3190 -0.19432 2020 9 16 59108 0.2380 0.3174 -0.19468 2020 9 17 59109 0.2374 0.3157 -0.19537 2020 9 18 59110 0.2367 0.3140 -0.19630 2020 9 19 59111 0.2360 0.3124 -0.19738 2020 9 20 59112 0.2353 0.3107 -0.19844 2020 9 21 59113 0.2346 0.3091 -0.19936 2020 9 22 59114 0.2338 0.3075 -0.20003 2020 9 23 59115 0.2330 0.3059 -0.20045 2020 9 24 59116 0.2321 0.3043 -0.20066 2020 9 25 59117 0.2312 0.3027 -0.20076 2020 9 26 59118 0.2303 0.3011 -0.20084 2020 9 27 59119 0.2294 0.2995 -0.20098 2020 9 28 59120 0.2284 0.2980 -0.20124 2020 9 29 59121 0.2274 0.2965 -0.20164 2020 9 30 59122 0.2264 0.2949 -0.20218 2020 10 1 59123 0.2254 0.2934 -0.20283 2020 10 2 59124 0.2243 0.2920 -0.20348 2020 10 3 59125 0.2232 0.2905 -0.20413 2020 10 4 59126 0.2220 0.2890 -0.20476 2020 10 5 59127 0.2209 0.2876 -0.20530 2020 10 6 59128 0.2197 0.2862 -0.20568 2020 10 7 59129 0.2184 0.2848 -0.20598 2020 10 8 59130 0.2172 0.2834 -0.20627 2020 10 9 59131 0.2159 0.2820 -0.20645 2020 10 10 59132 0.2146 0.2807 -0.20660 2020 10 11 59133 0.2133 0.2794 -0.20678 2020 10 12 59134 0.2119 0.2781 -0.20709 2020 10 13 59135 0.2105 0.2768 -0.20757 2020 10 14 59136 0.2091 0.2755 -0.20835 2020 10 15 59137 0.2077 0.2743 -0.20946 2020 10 16 59138 0.2062 0.2731 -0.21080 2020 10 17 59139 0.2048 0.2719 -0.21222 2020 10 18 59140 0.2033 0.2707 -0.21355 2020 10 19 59141 0.2018 0.2696 -0.21462 2020 10 20 59142 0.2002 0.2684 -0.21540 2020 10 21 59143 0.1986 0.2673 -0.21594 2020 10 22 59144 0.1971 0.2662 -0.21636 2020 10 23 59145 0.1954 0.2652 -0.21670 2020 10 24 59146 0.1938 0.2642 -0.21705 2020 10 25 59147 0.1922 0.2632 -0.21751 2020 10 26 59148 0.1905 0.2622 -0.21818 2020 10 27 59149 0.1888 0.2612 -0.21904 2020 10 28 59150 0.1871 0.2603 -0.22000 2020 10 29 59151 0.1854 0.2594 -0.22102 2020 10 30 59152 0.1837 0.2585 -0.22207 2020 10 31 59153 0.1819 0.2577 -0.22307 2020 11 1 59154 0.1801 0.2569 -0.22402 2020 11 2 59155 0.1783 0.2561 -0.22488 2020 11 3 59156 0.1765 0.2553 -0.22565 2020 11 4 59157 0.1747 0.2546 -0.22636 2020 11 5 59158 0.1729 0.2538 -0.22697 2020 11 6 59159 0.1710 0.2532 -0.22757 2020 11 7 59160 0.1692 0.2525 -0.22821 2020 11 8 59161 0.1673 0.2519 -0.22891 2020 11 9 59162 0.1654 0.2513 -0.22978 2020 11 10 59163 0.1635 0.2507 -0.23088 2020 11 11 59164 0.1616 0.2502 -0.23219 2020 11 12 59165 0.1597 0.2497 -0.23370 2020 11 13 59166 0.1578 0.2492 -0.23538 2020 11 14 59167 0.1558 0.2488 -0.23701 2020 11 15 59168 0.1539 0.2483 -0.23845 2020 11 16 59169 0.1519 0.2480 -0.23962 2020 11 17 59170 0.1500 0.2476 -0.24050 2020 11 18 59171 0.1480 0.2473 -0.24114 2020 11 19 59172 0.1460 0.2470 -0.24167 2020 11 20 59173 0.1440 0.2467 -0.24222 2020 11 21 59174 0.1420 0.2465 -0.24287 2020 11 22 59175 0.1400 0.2463 -0.24367 2020 11 23 59176 0.1380 0.2461 -0.24457 2020 11 24 59177 0.1360 0.2460 -0.24554 2020 11 25 59178 0.1340 0.2459 -0.24655 2020 11 26 59179 0.1320 0.2458 -0.24761 2020 11 27 59180 0.1300 0.2457 -0.24859 2020 11 28 59181 0.1280 0.2457 -0.24948 2020 11 29 59182 0.1260 0.2457 -0.25025 2020 11 30 59183 0.1240 0.2458 -0.25087 2020 12 1 59184 0.1220 0.2459 -0.25137 2020 12 2 59185 0.1200 0.2460 -0.25178 2020 12 3 59186 0.1180 0.2461 -0.25213 2020 12 4 59187 0.1160 0.2463 -0.25251 2020 12 5 59188 0.1140 0.2465 -0.25295 2020 12 6 59189 0.1120 0.2467 -0.25351 2020 12 7 59190 0.1100 0.2470 -0.25423 2020 12 8 59191 0.1080 0.2473 -0.25517 2020 12 9 59192 0.1060 0.2476 -0.25635 2020 12 10 59193 0.1041 0.2480 -0.25767 2020 12 11 59194 0.1021 0.2484 -0.25908 2020 12 12 59195 0.1001 0.2488 -0.26040 2020 12 13 59196 0.0982 0.2492 -0.26148 2020 12 14 59197 0.0962 0.2497 -0.26227 2020 12 15 59198 0.0943 0.2502 -0.26276 2020 12 16 59199 0.0924 0.2508 -0.26309 2020 12 17 59200 0.0904 0.2514 -0.26339 2020 12 18 59201 0.0885 0.2520 -0.26374 2020 12 19 59202 0.0866 0.2526 -0.26423 2020 12 20 59203 0.0848 0.2533 -0.26483 2020 12 21 59204 0.0829 0.2540 -0.26549 2020 12 22 59205 0.0810 0.2547 -0.26620 2020 12 23 59206 0.0792 0.2554 -0.26691 2020 12 24 59207 0.0774 0.2562 -0.26755 2020 12 25 59208 0.0755 0.2570 -0.26815 2020 12 26 59209 0.0737 0.2579 -0.26870 2020 12 27 59210 0.0720 0.2587 -0.26916 2020 12 28 59211 0.0702 0.2596 -0.26946 2020 12 29 59212 0.0684 0.2606 -0.26959 2020 12 30 59213 0.0667 0.2615 -0.26962 2020 12 31 59214 0.0650 0.2625 -0.26966 2021 1 1 59215 0.0633 0.2635 -0.26976 2021 1 2 59216 0.0616 0.2645 -0.26994 2021 1 3 59217 0.0599 0.2656 -0.27028 2021 1 4 59218 0.0583 0.2667 -0.27078 2021 1 5 59219 0.0567 0.2678 -0.27144 2021 1 6 59220 0.0551 0.2689 -0.27225 2021 1 7 59221 0.0535 0.2701 -0.27313 2021 1 8 59222 0.0519 0.2713 -0.27395 2021 1 9 59223 0.0504 0.2725 -0.27460 2021 1 10 59224 0.0489 0.2738 -0.27509 2021 1 11 59225 0.0474 0.2750 -0.27536 2021 1 12 59226 0.0460 0.2763 -0.27549 2021 1 13 59227 0.0445 0.2776 -0.27554 2021 1 14 59228 0.0431 0.2790 -0.27567 2021 1 15 59229 0.0417 0.2803 -0.27594 2021 1 16 59230 0.0403 0.2817 -0.27633 2021 1 17 59231 0.0390 0.2831 -0.27692 2021 1 18 59232 0.0377 0.2845 -0.27765 2021 1 19 59233 0.0364 0.2860 -0.27845 2021 1 20 59234 0.0351 0.2874 -0.27922 2021 1 21 59235 0.0339 0.2889 -0.27993 2021 1 22 59236 0.0327 0.2904 -0.28051 2021 1 23 59237 0.0315 0.2920 -0.28102 2021 1 24 59238 0.0304 0.2935 -0.28141 2021 1 25 59239 0.0293 0.2951 -0.28165 2021 1 26 59240 0.0282 0.2967 -0.28181 2021 1 27 59241 0.0271 0.2983 -0.28195 2021 1 28 59242 0.0261 0.2999 -0.28213 2021 1 29 59243 0.0251 0.3015 -0.28243 2021 1 30 59244 0.0241 0.3032 -0.28291 2021 1 31 59245 0.0232 0.3048 -0.28363 2021 2 1 59246 0.0223 0.3065 -0.28456 2021 2 2 59247 0.0214 0.3082 -0.28564 2021 2 3 59248 0.0206 0.3099 -0.28680 2021 2 4 59249 0.0198 0.3116 -0.28792 2021 2 5 59250 0.0190 0.3134 -0.28887 2021 2 6 59251 0.0183 0.3151 -0.28960 2021 2 7 59252 0.0175 0.3169 -0.29008 2021 2 8 59253 0.0169 0.3187 -0.29040 2021 2 9 59254 0.0162 0.3205 -0.29065 2021 2 10 59255 0.0156 0.3223 -0.29092 2021 2 11 59256 0.0150 0.3241 -0.29132 2021 2 12 59257 0.0145 0.3259 -0.29185 2021 2 13 59258 0.0140 0.3277 -0.29249 2021 2 14 59259 0.0135 0.3296 -0.29324 2021 2 15 59260 0.0131 0.3314 -0.29407 2021 2 16 59261 0.0127 0.3333 -0.29495 2021 2 17 59262 0.0123 0.3351 -0.29578 2021 2 18 59263 0.0120 0.3370 -0.29650 2021 2 19 59264 0.0117 0.3389 -0.29707 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) 58877 -108.32 0.46 -6.78 0.05 58878 -108.38 0.46 -6.91 0.05 58879 -108.26 0.46 -6.98 0.05 58880 -108.05 0.44 -6.95 0.04 58881 -107.96 0.47 -6.85 0.05 58882 -108.04 0.47 -6.73 0.05 58883 -108.16 0.78 -6.60 0.07 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 58877 0.209 0.183 0.024 0.049 58878 0.205 0.183 0.012 0.049 58879 0.205 0.183 0.003 0.049 58880 0.214 0.174 0.000 0.040 58881 0.231 0.188 0.003 0.049 58882 0.255 0.188 0.009 0.049 58883 0.282 0.309 0.018 0.074 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).