********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 30 January 2020 Vol. XXXIII No. 005 ______________________________________________________________________ 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. * * * * As of Bulletin A Vol. XXXIII, No. 005, 30 Jan 2020, we have * * incorporated the new USNO VLBI solutions -- usno2020a.eoxy and * * usno2020a.eopi. The effect appears to be less than 0.1 mas in * * polar motion and 10 us in UT1-UTC. * * * * 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 24 58872 0.05208 .00009 0.30364 .00009 -0.186447 0.000009 20 1 25 58873 0.05183 .00009 0.30486 .00009 -0.186773 0.000009 20 1 26 58874 0.05135 .00009 0.30618 .00009 -0.187188 0.000008 20 1 27 58875 0.05044 .00009 0.30741 .00009 -0.187710 0.000006 20 1 28 58876 0.04938 .00009 0.30866 .00009 -0.188338 0.000006 20 1 29 58877 0.04824 .00009 0.31010 .00009 -0.189053 0.000005 20 1 30 58878 0.04698 .00009 0.31166 .00009 -0.189796 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 = 0.1197 - 0.0833 cos A - 0.0488 sin A + 0.0089 cos C + 0.0063 sin C y = 0.3487 - 0.0443 cos A + 0.0768 sin A + 0.0063 cos C - 0.0089 sin C UT1-UTC = -0.1897 - 0.00027 (MJD - 58886) - (UT2-UT1) where A = 2*pi*(MJD-58878)/365.25 and C = 2*pi*(MJD-58878)/435. TAI-UTC(MJD 58879) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58878)**0.80 S t = 0.00025 (MJD-58878)**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 31 58879 0.0458 0.3131 -0.19051 2020 2 1 58880 0.0446 0.3145 -0.19114 2020 2 2 58881 0.0436 0.3158 -0.19168 2020 2 3 58882 0.0427 0.3171 -0.19211 2020 2 4 58883 0.0419 0.3185 -0.19241 2020 2 5 58884 0.0411 0.3198 -0.19256 2020 2 6 58885 0.0403 0.3212 -0.19258 2020 2 7 58886 0.0396 0.3226 -0.19257 2020 2 8 58887 0.0389 0.3240 -0.19264 2020 2 9 58888 0.0382 0.3254 -0.19293 2020 2 10 58889 0.0376 0.3269 -0.19353 2020 2 11 58890 0.0370 0.3283 -0.19443 2020 2 12 58891 0.0365 0.3297 -0.19561 2020 2 13 58892 0.0359 0.3312 -0.19694 2020 2 14 58893 0.0354 0.3327 -0.19827 2020 2 15 58894 0.0350 0.3341 -0.19947 2020 2 16 58895 0.0346 0.3356 -0.20050 2020 2 17 58896 0.0343 0.3371 -0.20134 2020 2 18 58897 0.0339 0.3386 -0.20198 2020 2 19 58898 0.0337 0.3401 -0.20245 2020 2 20 58899 0.0334 0.3416 -0.20283 2020 2 21 58900 0.0332 0.3431 -0.20317 2020 2 22 58901 0.0330 0.3446 -0.20354 2020 2 23 58902 0.0329 0.3461 -0.20398 2020 2 24 58903 0.0327 0.3477 -0.20452 2020 2 25 58904 0.0327 0.3492 -0.20518 2020 2 26 58905 0.0326 0.3507 -0.20595 2020 2 27 58906 0.0326 0.3523 -0.20677 2020 2 28 58907 0.0326 0.3538 -0.20761 2020 2 29 58908 0.0326 0.3554 -0.20842 2020 3 1 58909 0.0326 0.3569 -0.20915 2020 3 2 58910 0.0327 0.3585 -0.20979 2020 3 3 58911 0.0328 0.3600 -0.21030 2020 3 4 58912 0.0330 0.3616 -0.21072 2020 3 5 58913 0.0332 0.3631 -0.21107 2020 3 6 58914 0.0334 0.3647 -0.21143 2020 3 7 58915 0.0336 0.3662 -0.21192 2020 3 8 58916 0.0339 0.3678 -0.21262 2020 3 9 58917 0.0342 0.3693 -0.21358 2020 3 10 58918 0.0345 0.3709 -0.21480 2020 3 11 58919 0.0348 0.3724 -0.21617 2020 3 12 58920 0.0352 0.3739 -0.21755 2020 3 13 58921 0.0356 0.3755 -0.21881 2020 3 14 58922 0.0361 0.3770 -0.21985 2020 3 15 58923 0.0365 0.3785 -0.22063 2020 3 16 58924 0.0370 0.3800 -0.22118 2020 3 17 58925 0.0376 0.3815 -0.22156 2020 3 18 58926 0.0381 0.3830 -0.22186 2020 3 19 58927 0.0387 0.3845 -0.22214 2020 3 20 58928 0.0393 0.3860 -0.22247 2020 3 21 58929 0.0400 0.3875 -0.22290 2020 3 22 58930 0.0406 0.3889 -0.22344 2020 3 23 58931 0.0413 0.3904 -0.22410 2020 3 24 58932 0.0421 0.3918 -0.22485 2020 3 25 58933 0.0428 0.3933 -0.22566 2020 3 26 58934 0.0436 0.3947 -0.22648 2020 3 27 58935 0.0444 0.3961 -0.22726 2020 3 28 58936 0.0453 0.3975 -0.22795 2020 3 29 58937 0.0461 0.3989 -0.22853 2020 3 30 58938 0.0470 0.4003 -0.22898 2020 3 31 58939 0.0480 0.4016 -0.22933 2020 4 1 58940 0.0489 0.4030 -0.22960 2020 4 2 58941 0.0499 0.4043 -0.22986 2020 4 3 58942 0.0509 0.4056 -0.23020 2020 4 4 58943 0.0519 0.4070 -0.23072 2020 4 5 58944 0.0530 0.4082 -0.23148 2020 4 6 58945 0.0540 0.4095 -0.23251 2020 4 7 58946 0.0551 0.4108 -0.23375 2020 4 8 58947 0.0563 0.4120 -0.23508 2020 4 9 58948 0.0574 0.4133 -0.23635 2020 4 10 58949 0.0586 0.4145 -0.23742 2020 4 11 58950 0.0598 0.4157 -0.23822 2020 4 12 58951 0.0610 0.4168 -0.23874 2020 4 13 58952 0.0623 0.4180 -0.23905 2020 4 14 58953 0.0635 0.4191 -0.23922 2020 4 15 58954 0.0648 0.4202 -0.23933 2020 4 16 58955 0.0661 0.4213 -0.23947 2020 4 17 58956 0.0675 0.4224 -0.23967 2020 4 18 58957 0.0688 0.4235 -0.23995 2020 4 19 58958 0.0702 0.4245 -0.24034 2020 4 20 58959 0.0716 0.4255 -0.24082 2020 4 21 58960 0.0730 0.4265 -0.24135 2020 4 22 58961 0.0744 0.4275 -0.24191 2020 4 23 58962 0.0759 0.4285 -0.24243 2020 4 24 58963 0.0774 0.4294 -0.24288 2020 4 25 58964 0.0789 0.4303 -0.24322 2020 4 26 58965 0.0804 0.4312 -0.24344 2020 4 27 58966 0.0819 0.4321 -0.24353 2020 4 28 58967 0.0834 0.4329 -0.24353 2020 4 29 58968 0.0850 0.4337 -0.24348 2020 4 30 58969 0.0866 0.4345 -0.24348 2020 5 1 58970 0.0882 0.4353 -0.24360 2020 5 2 58971 0.0898 0.4360 -0.24392 2020 5 3 58972 0.0914 0.4368 -0.24450 2020 5 4 58973 0.0930 0.4375 -0.24530 2020 5 5 58974 0.0947 0.4381 -0.24628 2020 5 6 58975 0.0963 0.4388 -0.24728 2020 5 7 58976 0.0980 0.4394 -0.24818 2020 5 8 58977 0.0997 0.4400 -0.24885 2020 5 9 58978 0.1014 0.4406 -0.24925 2020 5 10 58979 0.1031 0.4411 -0.24940 2020 5 11 58980 0.1048 0.4416 -0.24938 2020 5 12 58981 0.1065 0.4421 -0.24927 2020 5 13 58982 0.1083 0.4426 -0.24915 2020 5 14 58983 0.1100 0.4430 -0.24909 2020 5 15 58984 0.1118 0.4434 -0.24912 2020 5 16 58985 0.1135 0.4438 -0.24924 2020 5 17 58986 0.1153 0.4442 -0.24944 2020 5 18 58987 0.1171 0.4445 -0.24972 2020 5 19 58988 0.1189 0.4448 -0.25001 2020 5 20 58989 0.1207 0.4451 -0.25027 2020 5 21 58990 0.1225 0.4453 -0.25046 2020 5 22 58991 0.1243 0.4455 -0.25053 2020 5 23 58992 0.1261 0.4457 -0.25046 2020 5 24 58993 0.1279 0.4459 -0.25024 2020 5 25 58994 0.1297 0.4460 -0.24990 2020 5 26 58995 0.1315 0.4461 -0.24949 2020 5 27 58996 0.1333 0.4462 -0.24908 2020 5 28 58997 0.1352 0.4462 -0.24875 2020 5 29 58998 0.1370 0.4462 -0.24858 2020 5 30 58999 0.1388 0.4462 -0.24861 2020 5 31 59000 0.1406 0.4462 -0.24885 2020 6 1 59001 0.1424 0.4461 -0.24925 2020 6 2 59002 0.1443 0.4460 -0.24973 2020 6 3 59003 0.1461 0.4459 -0.25015 2020 6 4 59004 0.1479 0.4458 -0.25039 2020 6 5 59005 0.1497 0.4456 -0.25039 2020 6 6 59006 0.1515 0.4454 -0.25013 2020 6 7 59007 0.1533 0.4451 -0.24966 2020 6 8 59008 0.1551 0.4449 -0.24906 2020 6 9 59009 0.1569 0.4446 -0.24843 2020 6 10 59010 0.1587 0.4442 -0.24783 2020 6 11 59011 0.1605 0.4439 -0.24731 2020 6 12 59012 0.1623 0.4435 -0.24689 2020 6 13 59013 0.1640 0.4431 -0.24656 2020 6 14 59014 0.1658 0.4427 -0.24629 2020 6 15 59015 0.1676 0.4422 -0.24605 2020 6 16 59016 0.1693 0.4417 -0.24581 2020 6 17 59017 0.1710 0.4412 -0.24550 2020 6 18 59018 0.1728 0.4407 -0.24510 2020 6 19 59019 0.1745 0.4401 -0.24457 2020 6 20 59020 0.1762 0.4395 -0.24390 2020 6 21 59021 0.1779 0.4389 -0.24311 2020 6 22 59022 0.1796 0.4382 -0.24224 2020 6 23 59023 0.1812 0.4375 -0.24135 2020 6 24 59024 0.1829 0.4368 -0.24054 2020 6 25 59025 0.1845 0.4361 -0.23987 2020 6 26 59026 0.1862 0.4353 -0.23941 2020 6 27 59027 0.1878 0.4346 -0.23915 2020 6 28 59028 0.1894 0.4338 -0.23906 2020 6 29 59029 0.1910 0.4329 -0.23905 2020 6 30 59030 0.1925 0.4321 -0.23902 2020 7 1 59031 0.1941 0.4312 -0.23886 2020 7 2 59032 0.1956 0.4303 -0.23851 2020 7 3 59033 0.1971 0.4293 -0.23792 2020 7 4 59034 0.1986 0.4284 -0.23713 2020 7 5 59035 0.2001 0.4274 -0.23621 2020 7 6 59036 0.2016 0.4264 -0.23524 2020 7 7 59037 0.2030 0.4253 -0.23430 2020 7 8 59038 0.2045 0.4243 -0.23344 2020 7 9 59039 0.2059 0.4232 -0.23269 2020 7 10 59040 0.2072 0.4221 -0.23206 2020 7 11 59041 0.2086 0.4210 -0.23151 2020 7 12 59042 0.2100 0.4199 -0.23101 2020 7 13 59043 0.2113 0.4187 -0.23052 2020 7 14 59044 0.2126 0.4175 -0.23000 2020 7 15 59045 0.2138 0.4163 -0.22940 2020 7 16 59046 0.2151 0.4151 -0.22870 2020 7 17 59047 0.2163 0.4138 -0.22787 2020 7 18 59048 0.2175 0.4126 -0.22692 2020 7 19 59049 0.2187 0.4113 -0.22589 2020 7 20 59050 0.2199 0.4100 -0.22484 2020 7 21 59051 0.2210 0.4086 -0.22384 2020 7 22 59052 0.2221 0.4073 -0.22299 2020 7 23 59053 0.2232 0.4059 -0.22234 2020 7 24 59054 0.2242 0.4046 -0.22192 2020 7 25 59055 0.2253 0.4032 -0.22168 2020 7 26 59056 0.2263 0.4018 -0.22152 2020 7 27 59057 0.2273 0.4003 -0.22134 2020 7 28 59058 0.2282 0.3989 -0.22101 2020 7 29 59059 0.2291 0.3974 -0.22047 2020 7 30 59060 0.2300 0.3959 -0.21967 2020 7 31 59061 0.2309 0.3945 -0.21863 2020 8 1 59062 0.2317 0.3929 -0.21740 2020 8 2 59063 0.2325 0.3914 -0.21606 2020 8 3 59064 0.2333 0.3899 -0.21467 2020 8 4 59065 0.2341 0.3883 -0.21331 2020 8 5 59066 0.2348 0.3868 -0.21202 2020 8 6 59067 0.2355 0.3852 -0.21083 2020 8 7 59068 0.2361 0.3836 -0.20975 2020 8 8 59069 0.2368 0.3820 -0.20881 2020 8 9 59070 0.2374 0.3804 -0.20798 2020 8 10 59071 0.2379 0.3788 -0.20724 2020 8 11 59072 0.2385 0.3772 -0.20657 2020 8 12 59073 0.2390 0.3756 -0.20593 2020 8 13 59074 0.2395 0.3739 -0.20528 2020 8 14 59075 0.2399 0.3723 -0.20459 2020 8 15 59076 0.2403 0.3706 -0.20388 2020 8 16 59077 0.2407 0.3690 -0.20317 2020 8 17 59078 0.2410 0.3673 -0.20254 2020 8 18 59079 0.2414 0.3656 -0.20207 2020 8 19 59080 0.2417 0.3639 -0.20184 2020 8 20 59081 0.2419 0.3622 -0.20189 2020 8 21 59082 0.2421 0.3605 -0.20220 2020 8 22 59083 0.2423 0.3588 -0.20266 2020 8 23 59084 0.2425 0.3571 -0.20315 2020 8 24 59085 0.2426 0.3554 -0.20353 2020 8 25 59086 0.2427 0.3537 -0.20373 2020 8 26 59087 0.2428 0.3520 -0.20368 2020 8 27 59088 0.2428 0.3503 -0.20343 2020 8 28 59089 0.2428 0.3486 -0.20303 2020 8 29 59090 0.2427 0.3469 -0.20256 2020 8 30 59091 0.2427 0.3452 -0.20211 2020 8 31 59092 0.2426 0.3434 -0.20172 2020 9 1 59093 0.2424 0.3417 -0.20143 2020 9 2 59094 0.2423 0.3400 -0.20128 2020 9 3 59095 0.2421 0.3383 -0.20127 2020 9 4 59096 0.2418 0.3366 -0.20139 2020 9 5 59097 0.2416 0.3349 -0.20161 2020 9 6 59098 0.2413 0.3332 -0.20185 2020 9 7 59099 0.2409 0.3315 -0.20203 2020 9 8 59100 0.2406 0.3298 -0.20213 2020 9 9 59101 0.2402 0.3281 -0.20213 2020 9 10 59102 0.2398 0.3264 -0.20206 2020 9 11 59103 0.2393 0.3247 -0.20189 2020 9 12 59104 0.2388 0.3231 -0.20165 2020 9 13 59105 0.2383 0.3214 -0.20146 2020 9 14 59106 0.2377 0.3197 -0.20147 2020 9 15 59107 0.2371 0.3181 -0.20174 2020 9 16 59108 0.2365 0.3165 -0.20229 2020 9 17 59109 0.2359 0.3148 -0.20315 2020 9 18 59110 0.2352 0.3132 -0.20424 2020 9 19 59111 0.2345 0.3116 -0.20543 2020 9 20 59112 0.2337 0.3100 -0.20662 2020 9 21 59113 0.2330 0.3084 -0.20767 2020 9 22 59114 0.2322 0.3068 -0.20853 2020 9 23 59115 0.2313 0.3052 -0.20920 2020 9 24 59116 0.2305 0.3037 -0.20968 2020 9 25 59117 0.2296 0.3021 -0.21010 2020 9 26 59118 0.2287 0.3006 -0.21053 2020 9 27 59119 0.2277 0.2991 -0.21099 2020 9 28 59120 0.2267 0.2976 -0.21155 2020 9 29 59121 0.2257 0.2961 -0.21223 2020 9 30 59122 0.2247 0.2946 -0.21299 2020 10 1 59123 0.2236 0.2932 -0.21384 2020 10 2 59124 0.2225 0.2917 -0.21480 2020 10 3 59125 0.2214 0.2903 -0.21576 2020 10 4 59126 0.2203 0.2889 -0.21666 2020 10 5 59127 0.2191 0.2875 -0.21747 2020 10 6 59128 0.2179 0.2861 -0.21815 2020 10 7 59129 0.2167 0.2848 -0.21871 2020 10 8 59130 0.2154 0.2834 -0.21915 2020 10 9 59131 0.2141 0.2821 -0.21955 2020 10 10 59132 0.2128 0.2808 -0.21998 2020 10 11 59133 0.2115 0.2795 -0.22051 2020 10 12 59134 0.2102 0.2783 -0.22119 2020 10 13 59135 0.2088 0.2770 -0.22206 2020 10 14 59136 0.2074 0.2758 -0.22323 2020 10 15 59137 0.2060 0.2746 -0.22469 2020 10 16 59138 0.2045 0.2734 -0.22630 2020 10 17 59139 0.2030 0.2723 -0.22794 2020 10 18 59140 0.2015 0.2712 -0.22947 2020 10 19 59141 0.2000 0.2701 -0.23074 2020 10 20 59142 0.1985 0.2690 -0.23177 2020 10 21 59143 0.1970 0.2679 -0.23259 2020 10 22 59144 0.1954 0.2669 -0.23326 2020 10 23 59145 0.1938 0.2659 -0.23389 2020 10 24 59146 0.1922 0.2649 -0.23457 2020 10 25 59147 0.1905 0.2639 -0.23529 2020 10 26 59148 0.1889 0.2630 -0.23610 2020 10 27 59149 0.1872 0.2621 -0.23702 2020 10 28 59150 0.1855 0.2612 -0.23806 2020 10 29 59151 0.1838 0.2603 -0.23916 2020 10 30 59152 0.1821 0.2595 -0.24034 2020 10 31 59153 0.1804 0.2587 -0.24151 2020 11 1 59154 0.1786 0.2579 -0.24255 2020 11 2 59155 0.1769 0.2572 -0.24343 2020 11 3 59156 0.1751 0.2564 -0.24412 2020 11 4 59157 0.1733 0.2557 -0.24467 2020 11 5 59158 0.1715 0.2551 -0.24513 2020 11 6 59159 0.1697 0.2544 -0.24554 2020 11 7 59160 0.1678 0.2538 -0.24600 2020 11 8 59161 0.1660 0.2532 -0.24657 2020 11 9 59162 0.1641 0.2527 -0.24727 2020 11 10 59163 0.1623 0.2521 -0.24819 2020 11 11 59164 0.1604 0.2516 -0.24935 2020 11 12 59165 0.1585 0.2512 -0.25069 2020 11 13 59166 0.1566 0.2507 -0.25217 2020 11 14 59167 0.1547 0.2503 -0.25368 2020 11 15 59168 0.1528 0.2499 -0.25506 2020 11 16 59169 0.1509 0.2496 -0.25615 2020 11 17 59170 0.1489 0.2493 -0.25693 2020 11 18 59171 0.1470 0.2490 -0.25746 2020 11 19 59172 0.1451 0.2487 -0.25792 2020 11 20 59173 0.1431 0.2485 -0.25837 2020 11 21 59174 0.1412 0.2483 -0.25883 2020 11 22 59175 0.1392 0.2481 -0.25936 2020 11 23 59176 0.1373 0.2480 -0.25994 2020 11 24 59177 0.1353 0.2479 -0.26057 2020 11 25 59178 0.1333 0.2478 -0.26127 2020 11 26 59179 0.1314 0.2478 -0.26200 2020 11 27 59180 0.1294 0.2478 -0.26271 2020 11 28 59181 0.1275 0.2478 -0.26332 2020 11 29 59182 0.1255 0.2478 -0.26389 2020 11 30 59183 0.1235 0.2479 -0.26431 2020 12 1 59184 0.1216 0.2480 -0.26460 2020 12 2 59185 0.1196 0.2481 -0.26477 2020 12 3 59186 0.1177 0.2483 -0.26490 2020 12 4 59187 0.1157 0.2485 -0.26506 2020 12 5 59188 0.1137 0.2488 -0.26527 2020 12 6 59189 0.1118 0.2490 -0.26570 2020 12 7 59190 0.1099 0.2493 -0.26638 2020 12 8 59191 0.1079 0.2496 -0.26730 2020 12 9 59192 0.1060 0.2500 -0.26841 2020 12 10 59193 0.1041 0.2504 -0.26965 2020 12 11 59194 0.1021 0.2508 -0.27090 2020 12 12 59195 0.1002 0.2513 -0.27208 2020 12 13 59196 0.0983 0.2517 -0.27308 2020 12 14 59197 0.0964 0.2522 -0.27378 2020 12 15 59198 0.0945 0.2528 -0.27426 2020 12 16 59199 0.0927 0.2534 -0.27459 2020 12 17 59200 0.0908 0.2540 -0.27488 2020 12 18 59201 0.0890 0.2546 -0.27521 2020 12 19 59202 0.0871 0.2552 -0.27561 2020 12 20 59203 0.0853 0.2559 -0.27613 2020 12 21 59204 0.0835 0.2566 -0.27673 2020 12 22 59205 0.0817 0.2574 -0.27739 2020 12 23 59206 0.0799 0.2582 -0.27810 2020 12 24 59207 0.0781 0.2590 -0.27880 2020 12 25 59208 0.0763 0.2598 -0.27941 2020 12 26 59209 0.0746 0.2607 -0.27991 2020 12 27 59210 0.0729 0.2616 -0.28024 2020 12 28 59211 0.0711 0.2625 -0.28043 2020 12 29 59212 0.0694 0.2634 -0.28052 2020 12 30 59213 0.0678 0.2644 -0.28052 2020 12 31 59214 0.0661 0.2654 -0.28052 2021 1 1 59215 0.0645 0.2664 -0.28057 2021 1 2 59216 0.0628 0.2675 -0.28071 2021 1 3 59217 0.0612 0.2686 -0.28102 2021 1 4 59218 0.0596 0.2697 -0.28157 2021 1 5 59219 0.0581 0.2708 -0.28234 2021 1 6 59220 0.0565 0.2719 -0.28325 2021 1 7 59221 0.0550 0.2731 -0.28416 2021 1 8 59222 0.0535 0.2743 -0.28500 2021 1 9 59223 0.0520 0.2756 -0.28570 2021 1 10 59224 0.0506 0.2768 -0.28618 2021 1 11 59225 0.0491 0.2781 -0.28644 2021 1 12 59226 0.0477 0.2794 -0.28657 2021 1 13 59227 0.0464 0.2807 -0.28663 2021 1 14 59228 0.0450 0.2821 -0.28677 2021 1 15 59229 0.0437 0.2834 -0.28698 2021 1 16 59230 0.0424 0.2848 -0.28734 2021 1 17 59231 0.0411 0.2862 -0.28785 2021 1 18 59232 0.0398 0.2877 -0.28847 2021 1 19 59233 0.0386 0.2891 -0.28917 2021 1 20 59234 0.0374 0.2906 -0.28989 2021 1 21 59235 0.0362 0.2921 -0.29061 2021 1 22 59236 0.0351 0.2936 -0.29125 2021 1 23 59237 0.0339 0.2952 -0.29180 2021 1 24 59238 0.0328 0.2967 -0.29226 2021 1 25 59239 0.0318 0.2983 -0.29266 2021 1 26 59240 0.0307 0.2999 -0.29301 2021 1 27 59241 0.0297 0.3015 -0.29335 2021 1 28 59242 0.0288 0.3031 -0.29379 2021 1 29 59243 0.0278 0.3047 -0.29440 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).