********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 13 February 2020 Vol. XXXIII No. 007 ______________________________________________________________________ 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 7 58886 0.04003 .00009 0.32391 .00009 -0.192930 0.000016 20 2 8 58887 0.03881 .00009 0.32474 .00009 -0.193016 0.000016 20 2 9 58888 0.03801 .00009 0.32532 .00009 -0.193265 0.000017 20 2 10 58889 0.03760 .00009 0.32608 .00009 -0.193791 0.000009 20 2 11 58890 0.03739 .00009 0.32727 .00009 -0.194584 0.000008 20 2 12 58891 0.03735 .00009 0.32867 .00009 -0.195541 0.000008 20 2 13 58892 0.03733 .00009 0.33023 .00009 -0.196527 0.000008 _______________________________________________________________________ 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 = 0.1189 - 0.0915 cos A - 0.0302 sin A + 0.0069 cos C + 0.0059 sin C y = 0.3505 - 0.0272 cos A + 0.0831 sin A + 0.0059 cos C - 0.0069 sin C UT1-UTC = -0.1943 - 0.00024 (MJD - 58900) - (UT2-UT1) where A = 2*pi*(MJD-58892)/365.25 and C = 2*pi*(MJD-58892)/435. TAI-UTC(MJD 58893) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58892)**0.80 S t = 0.00025 (MJD-58892)**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 14 58893 0.0371 0.3319 -0.19747 2020 2 15 58894 0.0368 0.3335 -0.19827 2020 2 16 58895 0.0363 0.3351 -0.19886 2020 2 17 58896 0.0359 0.3366 -0.19926 2020 2 18 58897 0.0355 0.3379 -0.19950 2020 2 19 58898 0.0353 0.3393 -0.19967 2020 2 20 58899 0.0351 0.3407 -0.19984 2020 2 21 58900 0.0350 0.3422 -0.20005 2020 2 22 58901 0.0348 0.3437 -0.20032 2020 2 23 58902 0.0347 0.3452 -0.20066 2020 2 24 58903 0.0346 0.3468 -0.20107 2020 2 25 58904 0.0345 0.3484 -0.20157 2020 2 26 58905 0.0344 0.3499 -0.20215 2020 2 27 58906 0.0342 0.3514 -0.20280 2020 2 28 58907 0.0342 0.3529 -0.20347 2020 2 29 58908 0.0341 0.3544 -0.20411 2020 3 1 58909 0.0342 0.3559 -0.20470 2020 3 2 58910 0.0342 0.3573 -0.20522 2020 3 3 58911 0.0343 0.3588 -0.20568 2020 3 4 58912 0.0345 0.3603 -0.20611 2020 3 5 58913 0.0346 0.3619 -0.20654 2020 3 6 58914 0.0348 0.3634 -0.20705 2020 3 7 58915 0.0350 0.3649 -0.20773 2020 3 8 58916 0.0352 0.3664 -0.20867 2020 3 9 58917 0.0354 0.3678 -0.20990 2020 3 10 58918 0.0357 0.3693 -0.21140 2020 3 11 58919 0.0360 0.3708 -0.21304 2020 3 12 58920 0.0364 0.3723 -0.21466 2020 3 13 58921 0.0368 0.3737 -0.21614 2020 3 14 58922 0.0372 0.3752 -0.21737 2020 3 15 58923 0.0376 0.3767 -0.21832 2020 3 16 58924 0.0381 0.3781 -0.21904 2020 3 17 58925 0.0386 0.3796 -0.21960 2020 3 18 58926 0.0391 0.3810 -0.22008 2020 3 19 58927 0.0397 0.3825 -0.22056 2020 3 20 58928 0.0403 0.3839 -0.22109 2020 3 21 58929 0.0409 0.3853 -0.22172 2020 3 22 58930 0.0415 0.3867 -0.22246 2020 3 23 58931 0.0422 0.3882 -0.22330 2020 3 24 58932 0.0429 0.3896 -0.22423 2020 3 25 58933 0.0436 0.3909 -0.22519 2020 3 26 58934 0.0444 0.3923 -0.22616 2020 3 27 58935 0.0451 0.3937 -0.22707 2020 3 28 58936 0.0459 0.3950 -0.22789 2020 3 29 58937 0.0468 0.3964 -0.22859 2020 3 30 58938 0.0476 0.3977 -0.22917 2020 3 31 58939 0.0485 0.3990 -0.22963 2020 4 1 58940 0.0494 0.4003 -0.23002 2020 4 2 58941 0.0504 0.4016 -0.23041 2020 4 3 58942 0.0513 0.4029 -0.23087 2020 4 4 58943 0.0523 0.4042 -0.23150 2020 4 5 58944 0.0533 0.4054 -0.23237 2020 4 6 58945 0.0544 0.4067 -0.23350 2020 4 7 58946 0.0554 0.4079 -0.23486 2020 4 8 58947 0.0565 0.4091 -0.23631 2020 4 9 58948 0.0576 0.4103 -0.23770 2020 4 10 58949 0.0588 0.4115 -0.23890 2020 4 11 58950 0.0599 0.4126 -0.23985 2020 4 12 58951 0.0611 0.4138 -0.24052 2020 4 13 58952 0.0623 0.4149 -0.24098 2020 4 14 58953 0.0635 0.4160 -0.24131 2020 4 15 58954 0.0648 0.4171 -0.24158 2020 4 16 58955 0.0661 0.4181 -0.24188 2020 4 17 58956 0.0674 0.4192 -0.24223 2020 4 18 58957 0.0687 0.4202 -0.24268 2020 4 19 58958 0.0700 0.4212 -0.24321 2020 4 20 58959 0.0714 0.4222 -0.24383 2020 4 21 58960 0.0727 0.4232 -0.24449 2020 4 22 58961 0.0741 0.4241 -0.24517 2020 4 23 58962 0.0755 0.4251 -0.24580 2020 4 24 58963 0.0770 0.4260 -0.24636 2020 4 25 58964 0.0784 0.4269 -0.24680 2020 4 26 58965 0.0799 0.4277 -0.24709 2020 4 27 58966 0.0814 0.4286 -0.24725 2020 4 28 58967 0.0829 0.4294 -0.24730 2020 4 29 58968 0.0844 0.4302 -0.24729 2020 4 30 58969 0.0859 0.4309 -0.24731 2020 5 1 58970 0.0874 0.4317 -0.24743 2020 5 2 58971 0.0890 0.4324 -0.24774 2020 5 3 58972 0.0906 0.4331 -0.24828 2020 5 4 58973 0.0922 0.4338 -0.24905 2020 5 5 58974 0.0938 0.4345 -0.24997 2020 5 6 58975 0.0954 0.4351 -0.25092 2020 5 7 58976 0.0970 0.4357 -0.25175 2020 5 8 58977 0.0987 0.4363 -0.25233 2020 5 9 58978 0.1003 0.4368 -0.25264 2020 5 10 58979 0.1020 0.4374 -0.25269 2020 5 11 58980 0.1037 0.4379 -0.25255 2020 5 12 58981 0.1053 0.4383 -0.25233 2020 5 13 58982 0.1070 0.4388 -0.25209 2020 5 14 58983 0.1087 0.4392 -0.25191 2020 5 15 58984 0.1104 0.4396 -0.25181 2020 5 16 58985 0.1122 0.4400 -0.25182 2020 5 17 58986 0.1139 0.4403 -0.25191 2020 5 18 58987 0.1156 0.4407 -0.25206 2020 5 19 58988 0.1174 0.4410 -0.25224 2020 5 20 58989 0.1191 0.4412 -0.25239 2020 5 21 58990 0.1209 0.4415 -0.25247 2020 5 22 58991 0.1226 0.4417 -0.25243 2020 5 23 58992 0.1244 0.4419 -0.25227 2020 5 24 58993 0.1262 0.4420 -0.25196 2020 5 25 58994 0.1279 0.4422 -0.25153 2020 5 26 58995 0.1297 0.4423 -0.25104 2020 5 27 58996 0.1315 0.4423 -0.25056 2020 5 28 58997 0.1333 0.4424 -0.25016 2020 5 29 58998 0.1350 0.4424 -0.24993 2020 5 30 58999 0.1368 0.4424 -0.24991 2020 5 31 59000 0.1386 0.4424 -0.25010 2020 6 1 59001 0.1404 0.4423 -0.25050 2020 6 2 59002 0.1421 0.4422 -0.25097 2020 6 3 59003 0.1439 0.4421 -0.25138 2020 6 4 59004 0.1457 0.4420 -0.25163 2020 6 5 59005 0.1475 0.4418 -0.25163 2020 6 6 59006 0.1492 0.4416 -0.25137 2020 6 7 59007 0.1510 0.4414 -0.25091 2020 6 8 59008 0.1528 0.4411 -0.25032 2020 6 9 59009 0.1545 0.4408 -0.24969 2020 6 10 59010 0.1563 0.4405 -0.24910 2020 6 11 59011 0.1580 0.4402 -0.24859 2020 6 12 59012 0.1597 0.4398 -0.24817 2020 6 13 59013 0.1615 0.4394 -0.24784 2020 6 14 59014 0.1632 0.4390 -0.24757 2020 6 15 59015 0.1649 0.4386 -0.24733 2020 6 16 59016 0.1666 0.4381 -0.24708 2020 6 17 59017 0.1683 0.4376 -0.24677 2020 6 18 59018 0.1700 0.4371 -0.24636 2020 6 19 59019 0.1717 0.4365 -0.24582 2020 6 20 59020 0.1734 0.4359 -0.24514 2020 6 21 59021 0.1750 0.4353 -0.24433 2020 6 22 59022 0.1767 0.4347 -0.24344 2020 6 23 59023 0.1783 0.4341 -0.24253 2020 6 24 59024 0.1799 0.4334 -0.24170 2020 6 25 59025 0.1815 0.4327 -0.24101 2020 6 26 59026 0.1831 0.4319 -0.24052 2020 6 27 59027 0.1847 0.4312 -0.24023 2020 6 28 59028 0.1863 0.4304 -0.24010 2020 6 29 59029 0.1878 0.4296 -0.24006 2020 6 30 59030 0.1894 0.4288 -0.23999 2020 7 1 59031 0.1909 0.4279 -0.23980 2020 7 2 59032 0.1924 0.4270 -0.23940 2020 7 3 59033 0.1939 0.4261 -0.23877 2020 7 4 59034 0.1954 0.4252 -0.23793 2020 7 5 59035 0.1968 0.4242 -0.23696 2020 7 6 59036 0.1983 0.4233 -0.23593 2020 7 7 59037 0.1997 0.4223 -0.23494 2020 7 8 59038 0.2011 0.4213 -0.23402 2020 7 9 59039 0.2024 0.4202 -0.23322 2020 7 10 59040 0.2038 0.4191 -0.23253 2020 7 11 59041 0.2051 0.4181 -0.23192 2020 7 12 59042 0.2065 0.4170 -0.23137 2020 7 13 59043 0.2077 0.4158 -0.23083 2020 7 14 59044 0.2090 0.4147 -0.23025 2020 7 15 59045 0.2103 0.4135 -0.22960 2020 7 16 59046 0.2115 0.4123 -0.22885 2020 7 17 59047 0.2127 0.4111 -0.22798 2020 7 18 59048 0.2139 0.4099 -0.22700 2020 7 19 59049 0.2151 0.4087 -0.22593 2020 7 20 59050 0.2162 0.4074 -0.22485 2020 7 21 59051 0.2173 0.4061 -0.22383 2020 7 22 59052 0.2184 0.4048 -0.22296 2020 7 23 59053 0.2194 0.4035 -0.22231 2020 7 24 59054 0.2205 0.4022 -0.22190 2020 7 25 59055 0.2215 0.4008 -0.22168 2020 7 26 59056 0.2225 0.3994 -0.22157 2020 7 27 59057 0.2234 0.3981 -0.22145 2020 7 28 59058 0.2244 0.3967 -0.22122 2020 7 29 59059 0.2253 0.3952 -0.22081 2020 7 30 59060 0.2262 0.3938 -0.22018 2020 7 31 59061 0.2270 0.3924 -0.21936 2020 8 1 59062 0.2278 0.3909 -0.21841 2020 8 2 59063 0.2286 0.3894 -0.21740 2020 8 3 59064 0.2294 0.3879 -0.21641 2020 8 4 59065 0.2301 0.3865 -0.21551 2020 8 5 59066 0.2308 0.3849 -0.21472 2020 8 6 59067 0.2315 0.3834 -0.21406 2020 8 7 59068 0.2322 0.3819 -0.21350 2020 8 8 59069 0.2328 0.3803 -0.21300 2020 8 9 59070 0.2334 0.3788 -0.21252 2020 8 10 59071 0.2339 0.3772 -0.21201 2020 8 11 59072 0.2345 0.3757 -0.21141 2020 8 12 59073 0.2350 0.3741 -0.21069 2020 8 13 59074 0.2354 0.3725 -0.20983 2020 8 14 59075 0.2359 0.3709 -0.20882 2020 8 15 59076 0.2363 0.3693 -0.20767 2020 8 16 59077 0.2367 0.3677 -0.20643 2020 8 17 59078 0.2370 0.3661 -0.20516 2020 8 18 59079 0.2373 0.3644 -0.20397 2020 8 19 59080 0.2376 0.3628 -0.20293 2020 8 20 59081 0.2379 0.3612 -0.20213 2020 8 21 59082 0.2381 0.3595 -0.20155 2020 8 22 59083 0.2383 0.3579 -0.20115 2020 8 23 59084 0.2384 0.3562 -0.20084 2020 8 24 59085 0.2386 0.3546 -0.20053 2020 8 25 59086 0.2387 0.3529 -0.20015 2020 8 26 59087 0.2387 0.3513 -0.19965 2020 8 27 59088 0.2387 0.3496 -0.19906 2020 8 28 59089 0.2387 0.3479 -0.19841 2020 8 29 59090 0.2387 0.3463 -0.19777 2020 8 30 59091 0.2386 0.3446 -0.19721 2020 8 31 59092 0.2385 0.3429 -0.19677 2020 9 1 59093 0.2384 0.3413 -0.19648 2020 9 2 59094 0.2383 0.3396 -0.19635 2020 9 3 59095 0.2381 0.3380 -0.19637 2020 9 4 59096 0.2378 0.3363 -0.19650 2020 9 5 59097 0.2376 0.3347 -0.19671 2020 9 6 59098 0.2373 0.3330 -0.19694 2020 9 7 59099 0.2370 0.3314 -0.19715 2020 9 8 59100 0.2366 0.3297 -0.19730 2020 9 9 59101 0.2362 0.3281 -0.19736 2020 9 10 59102 0.2358 0.3265 -0.19733 2020 9 11 59103 0.2354 0.3248 -0.19721 2020 9 12 59104 0.2349 0.3232 -0.19704 2020 9 13 59105 0.2344 0.3216 -0.19688 2020 9 14 59106 0.2338 0.3200 -0.19683 2020 9 15 59107 0.2333 0.3184 -0.19698 2020 9 16 59108 0.2327 0.3168 -0.19740 2020 9 17 59109 0.2320 0.3152 -0.19811 2020 9 18 59110 0.2314 0.3136 -0.19904 2020 9 19 59111 0.2307 0.3121 -0.20006 2020 9 20 59112 0.2299 0.3105 -0.20103 2020 9 21 59113 0.2292 0.3090 -0.20183 2020 9 22 59114 0.2284 0.3075 -0.20235 2020 9 23 59115 0.2276 0.3059 -0.20266 2020 9 24 59116 0.2267 0.3044 -0.20285 2020 9 25 59117 0.2259 0.3029 -0.20291 2020 9 26 59118 0.2250 0.3014 -0.20295 2020 9 27 59119 0.2240 0.3000 -0.20302 2020 9 28 59120 0.2231 0.2985 -0.20318 2020 9 29 59121 0.2221 0.2971 -0.20342 2020 9 30 59122 0.2211 0.2957 -0.20380 2020 10 1 59123 0.2200 0.2942 -0.20433 2020 10 2 59124 0.2190 0.2928 -0.20497 2020 10 3 59125 0.2179 0.2915 -0.20566 2020 10 4 59126 0.2167 0.2901 -0.20634 2020 10 5 59127 0.2156 0.2888 -0.20691 2020 10 6 59128 0.2144 0.2874 -0.20735 2020 10 7 59129 0.2132 0.2861 -0.20768 2020 10 8 59130 0.2120 0.2848 -0.20795 2020 10 9 59131 0.2107 0.2835 -0.20812 2020 10 10 59132 0.2095 0.2823 -0.20827 2020 10 11 59133 0.2082 0.2810 -0.20850 2020 10 12 59134 0.2068 0.2798 -0.20897 2020 10 13 59135 0.2055 0.2786 -0.20974 2020 10 14 59136 0.2041 0.2775 -0.21080 2020 10 15 59137 0.2027 0.2763 -0.21214 2020 10 16 59138 0.2013 0.2752 -0.21368 2020 10 17 59139 0.1999 0.2741 -0.21525 2020 10 18 59140 0.1984 0.2730 -0.21674 2020 10 19 59141 0.1969 0.2719 -0.21803 2020 10 20 59142 0.1954 0.2708 -0.21909 2020 10 21 59143 0.1939 0.2698 -0.21998 2020 10 22 59144 0.1923 0.2688 -0.22069 2020 10 23 59145 0.1908 0.2678 -0.22139 2020 10 24 59146 0.1892 0.2669 -0.22214 2020 10 25 59147 0.1876 0.2660 -0.22294 2020 10 26 59148 0.1860 0.2651 -0.22385 2020 10 27 59149 0.1843 0.2642 -0.22486 2020 10 28 59150 0.1827 0.2633 -0.22592 2020 10 29 59151 0.1810 0.2625 -0.22703 2020 10 30 59152 0.1793 0.2617 -0.22819 2020 10 31 59153 0.1776 0.2609 -0.22932 2020 11 1 59154 0.1759 0.2602 -0.23032 2020 11 2 59155 0.1742 0.2594 -0.23121 2020 11 3 59156 0.1724 0.2587 -0.23194 2020 11 4 59157 0.1707 0.2581 -0.23253 2020 11 5 59158 0.1689 0.2574 -0.23302 2020 11 6 59159 0.1671 0.2568 -0.23348 2020 11 7 59160 0.1653 0.2562 -0.23400 2020 11 8 59161 0.1635 0.2556 -0.23467 2020 11 9 59162 0.1617 0.2551 -0.23551 2020 11 10 59163 0.1599 0.2546 -0.23656 2020 11 11 59164 0.1580 0.2541 -0.23787 2020 11 12 59165 0.1562 0.2537 -0.23943 2020 11 13 59166 0.1543 0.2532 -0.24105 2020 11 14 59167 0.1524 0.2529 -0.24264 2020 11 15 59168 0.1506 0.2525 -0.24405 2020 11 16 59169 0.1487 0.2522 -0.24518 2020 11 17 59170 0.1468 0.2519 -0.24606 2020 11 18 59171 0.1449 0.2516 -0.24677 2020 11 19 59172 0.1430 0.2513 -0.24737 2020 11 20 59173 0.1411 0.2511 -0.24799 2020 11 21 59174 0.1392 0.2509 -0.24868 2020 11 22 59175 0.1372 0.2508 -0.24944 2020 11 23 59176 0.1353 0.2506 -0.25027 2020 11 24 59177 0.1334 0.2505 -0.25119 2020 11 25 59178 0.1315 0.2505 -0.25219 2020 11 26 59179 0.1296 0.2504 -0.25320 2020 11 27 59180 0.1276 0.2504 -0.25425 2020 11 28 59181 0.1257 0.2505 -0.25523 2020 11 29 59182 0.1238 0.2505 -0.25606 2020 11 30 59183 0.1218 0.2506 -0.25671 2020 12 1 59184 0.1199 0.2507 -0.25716 2020 12 2 59185 0.1180 0.2508 -0.25747 2020 12 3 59186 0.1161 0.2510 -0.25772 2020 12 4 59187 0.1142 0.2512 -0.25797 2020 12 5 59188 0.1122 0.2515 -0.25832 2020 12 6 59189 0.1103 0.2517 -0.25881 2020 12 7 59190 0.1084 0.2520 -0.25947 2020 12 8 59191 0.1065 0.2523 -0.26033 2020 12 9 59192 0.1046 0.2527 -0.26138 2020 12 10 59193 0.1027 0.2531 -0.26253 2020 12 11 59194 0.1008 0.2535 -0.26372 2020 12 12 59195 0.0990 0.2539 -0.26488 2020 12 13 59196 0.0971 0.2544 -0.26587 2020 12 14 59197 0.0952 0.2549 -0.26658 2020 12 15 59198 0.0934 0.2554 -0.26701 2020 12 16 59199 0.0916 0.2560 -0.26728 2020 12 17 59200 0.0897 0.2566 -0.26753 2020 12 18 59201 0.0879 0.2572 -0.26784 2020 12 19 59202 0.0861 0.2578 -0.26819 2020 12 20 59203 0.0843 0.2585 -0.26862 2020 12 21 59204 0.0825 0.2592 -0.26910 2020 12 22 59205 0.0807 0.2599 -0.26960 2020 12 23 59206 0.0790 0.2607 -0.27014 2020 12 24 59207 0.0772 0.2615 -0.27068 2020 12 25 59208 0.0755 0.2623 -0.27114 2020 12 26 59209 0.0738 0.2631 -0.27150 2020 12 27 59210 0.0721 0.2640 -0.27178 2020 12 28 59211 0.0704 0.2649 -0.27193 2020 12 29 59212 0.0688 0.2658 -0.27197 2020 12 30 59213 0.0671 0.2668 -0.27191 2020 12 31 59214 0.0655 0.2678 -0.27188 2021 1 1 59215 0.0639 0.2688 -0.27194 2021 1 2 59216 0.0623 0.2698 -0.27211 2021 1 3 59217 0.0607 0.2708 -0.27255 2021 1 4 59218 0.0591 0.2719 -0.27326 2021 1 5 59219 0.0576 0.2730 -0.27419 2021 1 6 59220 0.0561 0.2742 -0.27524 2021 1 7 59221 0.0546 0.2753 -0.27632 2021 1 8 59222 0.0531 0.2765 -0.27731 2021 1 9 59223 0.0517 0.2777 -0.27818 2021 1 10 59224 0.0502 0.2789 -0.27886 2021 1 11 59225 0.0488 0.2802 -0.27927 2021 1 12 59226 0.0475 0.2814 -0.27953 2021 1 13 59227 0.0461 0.2827 -0.27974 2021 1 14 59228 0.0448 0.2840 -0.27998 2021 1 15 59229 0.0434 0.2854 -0.28032 2021 1 16 59230 0.0422 0.2867 -0.28076 2021 1 17 59231 0.0409 0.2881 -0.28134 2021 1 18 59232 0.0397 0.2895 -0.28199 2021 1 19 59233 0.0385 0.2909 -0.28267 2021 1 20 59234 0.0373 0.2924 -0.28338 2021 1 21 59235 0.0361 0.2938 -0.28404 2021 1 22 59236 0.0350 0.2953 -0.28460 2021 1 23 59237 0.0339 0.2968 -0.28503 2021 1 24 59238 0.0328 0.2983 -0.28528 2021 1 25 59239 0.0318 0.2998 -0.28542 2021 1 26 59240 0.0308 0.3014 -0.28549 2021 1 27 59241 0.0298 0.3029 -0.28553 2021 1 28 59242 0.0288 0.3045 -0.28564 2021 1 29 59243 0.0279 0.3061 -0.28587 2021 1 30 59244 0.0270 0.3077 -0.28625 2021 1 31 59245 0.0261 0.3094 -0.28686 2021 2 1 59246 0.0253 0.3110 -0.28771 2021 2 2 59247 0.0245 0.3127 -0.28874 2021 2 3 59248 0.0237 0.3143 -0.28983 2021 2 4 59249 0.0230 0.3160 -0.29082 2021 2 5 59250 0.0223 0.3177 -0.29165 2021 2 6 59251 0.0216 0.3194 -0.29229 2021 2 7 59252 0.0209 0.3211 -0.29272 2021 2 8 59253 0.0203 0.3229 -0.29298 2021 2 9 59254 0.0197 0.3246 -0.29318 2021 2 10 59255 0.0192 0.3264 -0.29341 2021 2 11 59256 0.0187 0.3281 -0.29378 2021 2 12 59257 0.0182 0.3299 -0.29426 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) 58871 -108.64 0.35 -6.40 0.09 58872 -108.26 0.35 -6.50 0.09 58873 -108.06 0.35 -6.60 0.09 58874 -107.97 0.40 -6.65 0.08 58875 -107.94 0.40 -6.63 0.08 58876 -107.94 0.88 -6.64 0.08 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 58871 0.135 0.138 0.044 0.085 58872 0.157 0.138 0.055 0.085 58873 0.189 0.138 0.064 0.085 58874 0.226 0.159 0.072 0.085 58875 0.267 0.159 0.079 0.085 58876 0.310 0.351 0.087 0.083 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).