********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 5 March 2020 Vol. XXXIII No. 010 ______________________________________________________________________ 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 28 58907 0.02861 .00009 0.35109 .00009 -0.203516 0.000019 20 2 29 58908 0.02827 .00009 0.35321 .00009 -0.204272 0.000016 20 3 1 58909 0.02766 .00009 0.35520 .00009 -0.204976 0.000016 20 3 2 58910 0.02697 .00009 0.35712 .00009 -0.205613 0.000014 20 3 3 58911 0.02638 .00009 0.35896 .00009 -0.206164 0.000014 20 3 4 58912 0.02612 .00009 0.36057 .00009 -0.206647 0.000014 20 3 5 58913 0.02625 .00009 0.36201 .00009 -0.207098 0.000055 IERS Final Values MJD x y UT1-UTC " " s 20 1 2 58850 0.0746 0.2827 -0.17758 20 1 3 58851 0.0727 0.2832 -0.17810 20 1 4 58852 0.0713 0.2840 -0.17865 20 1 5 58853 0.0701 0.2849 -0.17914 20 1 6 58854 0.0684 0.2853 -0.17947 20 1 7 58855 0.0666 0.2855 -0.17961 20 1 8 58856 0.0649 0.2859 -0.17956 20 1 9 58857 0.0636 0.2865 -0.17937 20 1 10 58858 0.0626 0.2875 -0.17912 20 1 11 58859 0.0619 0.2887 -0.17890 20 1 12 58860 0.0611 0.2899 -0.17881 20 1 13 58861 0.0609 0.2910 -0.17894 20 1 14 58862 0.0606 0.2924 -0.17933 20 1 15 58863 0.0596 0.2938 -0.17995 20 1 16 58864 0.0585 0.2953 -0.18078 20 1 17 58865 0.0574 0.2968 -0.18174 20 1 18 58866 0.0565 0.2976 -0.18276 20 1 19 58867 0.0556 0.2986 -0.18373 20 1 20 58868 0.0546 0.2995 -0.18454 20 1 21 58869 0.0538 0.3002 -0.18523 20 1 22 58870 0.0533 0.3011 -0.18580 20 1 23 58871 0.0526 0.3025 -0.18619 20 1 24 58872 0.0519 0.3036 -0.18648 20 1 25 58873 0.0520 0.3048 -0.18680 20 1 26 58874 0.0515 0.3063 -0.18719 20 1 27 58875 0.0505 0.3074 -0.18769 20 1 28 58876 0.0494 0.3087 -0.18833 20 1 29 58877 0.0484 0.3101 -0.18906 20 1 30 58878 0.0471 0.3117 -0.18980 20 1 31 58879 0.0457 0.3129 -0.19052 20 2 1 58880 0.0444 0.3144 -0.19117 _______________________________________________________________________ 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 = 0.1172 - 0.0960 cos A - 0.0046 sin A + 0.0025 cos C + 0.0101 sin C y = 0.3556 - 0.0037 cos A + 0.0852 sin A + 0.0101 cos C - 0.0025 sin C UT1-UTC = -0.2040 - 0.00021 (MJD - 58921) - (UT2-UT1) where A = 2*pi*(MJD-58913)/365.25 and C = 2*pi*(MJD-58913)/435. TAI-UTC(MJD 58914) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58913)**0.80 S t = 0.00025 (MJD-58913)**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 3 6 58914 0.0266 0.3635 -0.20761 2020 3 7 58915 0.0269 0.3651 -0.20824 2020 3 8 58916 0.0272 0.3668 -0.20905 2020 3 9 58917 0.0274 0.3685 -0.21010 2020 3 10 58918 0.0276 0.3703 -0.21140 2020 3 11 58919 0.0278 0.3720 -0.21286 2020 3 12 58920 0.0280 0.3737 -0.21435 2020 3 13 58921 0.0282 0.3752 -0.21572 2020 3 14 58922 0.0286 0.3767 -0.21686 2020 3 15 58923 0.0290 0.3782 -0.21776 2020 3 16 58924 0.0295 0.3797 -0.21844 2020 3 17 58925 0.0301 0.3812 -0.21899 2020 3 18 58926 0.0306 0.3828 -0.21947 2020 3 19 58927 0.0313 0.3844 -0.21995 2020 3 20 58928 0.0319 0.3859 -0.22047 2020 3 21 58929 0.0325 0.3875 -0.22108 2020 3 22 58930 0.0332 0.3890 -0.22179 2020 3 23 58931 0.0338 0.3905 -0.22263 2020 3 24 58932 0.0346 0.3920 -0.22355 2020 3 25 58933 0.0353 0.3935 -0.22450 2020 3 26 58934 0.0361 0.3950 -0.22544 2020 3 27 58935 0.0370 0.3964 -0.22632 2020 3 28 58936 0.0378 0.3979 -0.22710 2020 3 29 58937 0.0387 0.3993 -0.22777 2020 3 30 58938 0.0396 0.4008 -0.22832 2020 3 31 58939 0.0406 0.4022 -0.22876 2020 4 1 58940 0.0415 0.4036 -0.22914 2020 4 2 58941 0.0425 0.4050 -0.22952 2020 4 3 58942 0.0436 0.4064 -0.23000 2020 4 4 58943 0.0446 0.4078 -0.23067 2020 4 5 58944 0.0457 0.4091 -0.23163 2020 4 6 58945 0.0468 0.4104 -0.23288 2020 4 7 58946 0.0479 0.4118 -0.23439 2020 4 8 58947 0.0491 0.4131 -0.23602 2020 4 9 58948 0.0503 0.4143 -0.23763 2020 4 10 58949 0.0515 0.4156 -0.23906 2020 4 11 58950 0.0527 0.4169 -0.24024 2020 4 12 58951 0.0540 0.4181 -0.24113 2020 4 13 58952 0.0552 0.4193 -0.24179 2020 4 14 58953 0.0565 0.4205 -0.24231 2020 4 15 58954 0.0579 0.4216 -0.24275 2020 4 16 58955 0.0592 0.4228 -0.24321 2020 4 17 58956 0.0606 0.4239 -0.24373 2020 4 18 58957 0.0620 0.4250 -0.24436 2020 4 19 58958 0.0634 0.4261 -0.24508 2020 4 20 58959 0.0649 0.4272 -0.24590 2020 4 21 58960 0.0663 0.4282 -0.24678 2020 4 22 58961 0.0678 0.4292 -0.24767 2020 4 23 58962 0.0693 0.4302 -0.24852 2020 4 24 58963 0.0708 0.4312 -0.24929 2020 4 25 58964 0.0724 0.4321 -0.24992 2020 4 26 58965 0.0739 0.4330 -0.25041 2020 4 27 58966 0.0755 0.4339 -0.25075 2020 4 28 58967 0.0771 0.4348 -0.25098 2020 4 29 58968 0.0787 0.4357 -0.25115 2020 4 30 58969 0.0804 0.4365 -0.25134 2020 5 1 58970 0.0820 0.4373 -0.25165 2020 5 2 58971 0.0837 0.4381 -0.25215 2020 5 3 58972 0.0854 0.4388 -0.25288 2020 5 4 58973 0.0871 0.4396 -0.25385 2020 5 5 58974 0.0888 0.4403 -0.25496 2020 5 6 58975 0.0905 0.4409 -0.25610 2020 5 7 58976 0.0923 0.4416 -0.25712 2020 5 8 58977 0.0940 0.4422 -0.25790 2020 5 9 58978 0.0958 0.4428 -0.25839 2020 5 10 58979 0.0976 0.4433 -0.25862 2020 5 11 58980 0.0993 0.4439 -0.25866 2020 5 12 58981 0.1011 0.4444 -0.25861 2020 5 13 58982 0.1030 0.4449 -0.25855 2020 5 14 58983 0.1048 0.4453 -0.25854 2020 5 15 58984 0.1066 0.4458 -0.25861 2020 5 16 58985 0.1084 0.4462 -0.25876 2020 5 17 58986 0.1103 0.4465 -0.25900 2020 5 18 58987 0.1121 0.4469 -0.25928 2020 5 19 58988 0.1140 0.4472 -0.25957 2020 5 20 58989 0.1159 0.4475 -0.25982 2020 5 21 58990 0.1177 0.4477 -0.25999 2020 5 22 58991 0.1196 0.4479 -0.26004 2020 5 23 58992 0.1215 0.4481 -0.25994 2020 5 24 58993 0.1234 0.4483 -0.25969 2020 5 25 58994 0.1253 0.4484 -0.25932 2020 5 26 58995 0.1272 0.4485 -0.25887 2020 5 27 58996 0.1291 0.4486 -0.25843 2020 5 28 58997 0.1310 0.4487 -0.25805 2020 5 29 58998 0.1329 0.4487 -0.25783 2020 5 30 58999 0.1348 0.4487 -0.25780 2020 5 31 59000 0.1367 0.4486 -0.25798 2020 6 1 59001 0.1386 0.4486 -0.25831 2020 6 2 59002 0.1405 0.4485 -0.25870 2020 6 3 59003 0.1424 0.4484 -0.25903 2020 6 4 59004 0.1443 0.4482 -0.25918 2020 6 5 59005 0.1462 0.4480 -0.25908 2020 6 6 59006 0.1481 0.4478 -0.25872 2020 6 7 59007 0.1500 0.4475 -0.25815 2020 6 8 59008 0.1519 0.4473 -0.25744 2020 6 9 59009 0.1537 0.4470 -0.25669 2020 6 10 59010 0.1556 0.4466 -0.25597 2020 6 11 59011 0.1575 0.4463 -0.25533 2020 6 12 59012 0.1593 0.4459 -0.25478 2020 6 13 59013 0.1612 0.4455 -0.25432 2020 6 14 59014 0.1630 0.4450 -0.25393 2020 6 15 59015 0.1649 0.4445 -0.25356 2020 6 16 59016 0.1667 0.4440 -0.25319 2020 6 17 59017 0.1685 0.4435 -0.25277 2020 6 18 59018 0.1703 0.4429 -0.25225 2020 6 19 59019 0.1721 0.4423 -0.25160 2020 6 20 59020 0.1739 0.4417 -0.25082 2020 6 21 59021 0.1757 0.4411 -0.24991 2020 6 22 59022 0.1775 0.4404 -0.24900 2020 6 23 59023 0.1792 0.4397 -0.24807 2020 6 24 59024 0.1809 0.4389 -0.24721 2020 6 25 59025 0.1827 0.4382 -0.24650 2020 6 26 59026 0.1844 0.4374 -0.24599 2020 6 27 59027 0.1861 0.4366 -0.24568 2020 6 28 59028 0.1878 0.4357 -0.24554 2020 6 29 59029 0.1894 0.4349 -0.24548 2020 6 30 59030 0.1911 0.4340 -0.24539 2020 7 1 59031 0.1927 0.4331 -0.24518 2020 7 2 59032 0.1943 0.4321 -0.24477 2020 7 3 59033 0.1959 0.4312 -0.24413 2020 7 4 59034 0.1975 0.4302 -0.24328 2020 7 5 59035 0.1990 0.4292 -0.24230 2020 7 6 59036 0.2006 0.4281 -0.24126 2020 7 7 59037 0.2021 0.4270 -0.24025 2020 7 8 59038 0.2036 0.4260 -0.23933 2020 7 9 59039 0.2051 0.4248 -0.23852 2020 7 10 59040 0.2065 0.4237 -0.23781 2020 7 11 59041 0.2080 0.4225 -0.23719 2020 7 12 59042 0.2094 0.4214 -0.23662 2020 7 13 59043 0.2108 0.4202 -0.23606 2020 7 14 59044 0.2121 0.4189 -0.23546 2020 7 15 59045 0.2135 0.4177 -0.23479 2020 7 16 59046 0.2148 0.4164 -0.23402 2020 7 17 59047 0.2161 0.4151 -0.23312 2020 7 18 59048 0.2174 0.4138 -0.23211 2020 7 19 59049 0.2186 0.4125 -0.23102 2020 7 20 59050 0.2198 0.4111 -0.22991 2020 7 21 59051 0.2210 0.4098 -0.22887 2020 7 22 59052 0.2222 0.4084 -0.22798 2020 7 23 59053 0.2233 0.4070 -0.22731 2020 7 24 59054 0.2245 0.4055 -0.22687 2020 7 25 59055 0.2255 0.4041 -0.22663 2020 7 26 59056 0.2266 0.4026 -0.22649 2020 7 27 59057 0.2276 0.4012 -0.22636 2020 7 28 59058 0.2286 0.3997 -0.22611 2020 7 29 59059 0.2296 0.3982 -0.22568 2020 7 30 59060 0.2306 0.3966 -0.22504 2020 7 31 59061 0.2315 0.3951 -0.22421 2020 8 1 59062 0.2324 0.3935 -0.22324 2020 8 2 59063 0.2332 0.3920 -0.22222 2020 8 3 59064 0.2340 0.3904 -0.22123 2020 8 4 59065 0.2348 0.3888 -0.22032 2020 8 5 59066 0.2356 0.3872 -0.21953 2020 8 6 59067 0.2363 0.3856 -0.21888 2020 8 7 59068 0.2370 0.3839 -0.21833 2020 8 8 59069 0.2377 0.3823 -0.21786 2020 8 9 59070 0.2384 0.3806 -0.21743 2020 8 10 59071 0.2390 0.3790 -0.21698 2020 8 11 59072 0.2395 0.3773 -0.21648 2020 8 12 59073 0.2401 0.3756 -0.21588 2020 8 13 59074 0.2406 0.3739 -0.21518 2020 8 14 59075 0.2411 0.3722 -0.21438 2020 8 15 59076 0.2415 0.3705 -0.21350 2020 8 16 59077 0.2419 0.3688 -0.21259 2020 8 17 59078 0.2423 0.3670 -0.21172 2020 8 18 59079 0.2427 0.3653 -0.21100 2020 8 19 59080 0.2430 0.3636 -0.21051 2020 8 20 59081 0.2433 0.3618 -0.21029 2020 8 21 59082 0.2435 0.3601 -0.21032 2020 8 22 59083 0.2437 0.3583 -0.21051 2020 8 23 59084 0.2439 0.3566 -0.21074 2020 8 24 59085 0.2440 0.3548 -0.21088 2020 8 25 59086 0.2442 0.3531 -0.21084 2020 8 26 59087 0.2442 0.3513 -0.21056 2020 8 27 59088 0.2443 0.3495 -0.21008 2020 8 28 59089 0.2443 0.3478 -0.20944 2020 8 29 59090 0.2443 0.3460 -0.20873 2020 8 30 59091 0.2442 0.3442 -0.20802 2020 8 31 59092 0.2441 0.3425 -0.20739 2020 9 1 59093 0.2440 0.3407 -0.20686 2020 9 2 59094 0.2438 0.3390 -0.20644 2020 9 3 59095 0.2436 0.3372 -0.20612 2020 9 4 59096 0.2434 0.3354 -0.20586 2020 9 5 59097 0.2431 0.3337 -0.20560 2020 9 6 59098 0.2428 0.3319 -0.20530 2020 9 7 59099 0.2425 0.3302 -0.20489 2020 9 8 59100 0.2422 0.3284 -0.20433 2020 9 9 59101 0.2418 0.3267 -0.20360 2020 9 10 59102 0.2413 0.3250 -0.20271 2020 9 11 59103 0.2409 0.3232 -0.20169 2020 9 12 59104 0.2404 0.3215 -0.20060 2020 9 13 59105 0.2398 0.3198 -0.19953 2020 9 14 59106 0.2393 0.3181 -0.19859 2020 9 15 59107 0.2387 0.3164 -0.19789 2020 9 16 59108 0.2380 0.3147 -0.19751 2020 9 17 59109 0.2374 0.3130 -0.19749 2020 9 18 59110 0.2367 0.3114 -0.19777 2020 9 19 59111 0.2360 0.3097 -0.19824 2020 9 20 59112 0.2352 0.3081 -0.19875 2020 9 21 59113 0.2344 0.3064 -0.19917 2020 9 22 59114 0.2336 0.3048 -0.19942 2020 9 23 59115 0.2327 0.3032 -0.19950 2020 9 24 59116 0.2318 0.3016 -0.19946 2020 9 25 59117 0.2309 0.3000 -0.19936 2020 9 26 59118 0.2300 0.2984 -0.19929 2020 9 27 59119 0.2290 0.2969 -0.19931 2020 9 28 59120 0.2280 0.2954 -0.19945 2020 9 29 59121 0.2270 0.2938 -0.19973 2020 9 30 59122 0.2259 0.2923 -0.20015 2020 10 1 59123 0.2248 0.2908 -0.20068 2020 10 2 59124 0.2237 0.2893 -0.20129 2020 10 3 59125 0.2225 0.2879 -0.20191 2020 10 4 59126 0.2213 0.2864 -0.20249 2020 10 5 59127 0.2201 0.2850 -0.20297 2020 10 6 59128 0.2189 0.2836 -0.20332 2020 10 7 59129 0.2176 0.2822 -0.20354 2020 10 8 59130 0.2163 0.2809 -0.20368 2020 10 9 59131 0.2150 0.2795 -0.20379 2020 10 10 59132 0.2137 0.2782 -0.20393 2020 10 11 59133 0.2123 0.2769 -0.20415 2020 10 12 59134 0.2109 0.2756 -0.20449 2020 10 13 59135 0.2095 0.2743 -0.20504 2020 10 14 59136 0.2080 0.2731 -0.20593 2020 10 15 59137 0.2065 0.2718 -0.20710 2020 10 16 59138 0.2051 0.2706 -0.20849 2020 10 17 59139 0.2035 0.2695 -0.20999 2020 10 18 59140 0.2020 0.2683 -0.21140 2020 10 19 59141 0.2004 0.2672 -0.21259 2020 10 20 59142 0.1988 0.2661 -0.21349 2020 10 21 59143 0.1972 0.2650 -0.21411 2020 10 22 59144 0.1956 0.2639 -0.21455 2020 10 23 59145 0.1940 0.2629 -0.21491 2020 10 24 59146 0.1923 0.2619 -0.21531 2020 10 25 59147 0.1906 0.2609 -0.21579 2020 10 26 59148 0.1889 0.2600 -0.21640 2020 10 27 59149 0.1872 0.2590 -0.21713 2020 10 28 59150 0.1854 0.2581 -0.21797 2020 10 29 59151 0.1837 0.2573 -0.21888 2020 10 30 59152 0.1819 0.2564 -0.21974 2020 10 31 59153 0.1801 0.2556 -0.22054 2020 11 1 59154 0.1783 0.2548 -0.22129 2020 11 2 59155 0.1764 0.2541 -0.22190 2020 11 3 59156 0.1746 0.2533 -0.22232 2020 11 4 59157 0.1727 0.2526 -0.22267 2020 11 5 59158 0.1709 0.2519 -0.22300 2020 11 6 59159 0.1690 0.2513 -0.22324 2020 11 7 59160 0.1671 0.2507 -0.22349 2020 11 8 59161 0.1652 0.2501 -0.22380 2020 11 9 59162 0.1632 0.2495 -0.22427 2020 11 10 59163 0.1613 0.2490 -0.22493 2020 11 11 59164 0.1594 0.2485 -0.22585 2020 11 12 59165 0.1574 0.2480 -0.22705 2020 11 13 59166 0.1554 0.2476 -0.22841 2020 11 14 59167 0.1535 0.2472 -0.22977 2020 11 15 59168 0.1515 0.2468 -0.23099 2020 11 16 59169 0.1495 0.2464 -0.23191 2020 11 17 59170 0.1475 0.2461 -0.23255 2020 11 18 59171 0.1455 0.2458 -0.23297 2020 11 19 59172 0.1435 0.2456 -0.23334 2020 11 20 59173 0.1415 0.2453 -0.23365 2020 11 21 59174 0.1394 0.2451 -0.23402 2020 11 22 59175 0.1374 0.2450 -0.23452 2020 11 23 59176 0.1354 0.2448 -0.23521 2020 11 24 59177 0.1334 0.2447 -0.23607 2020 11 25 59178 0.1313 0.2447 -0.23698 2020 11 26 59179 0.1293 0.2446 -0.23792 2020 11 27 59180 0.1273 0.2446 -0.23884 2020 11 28 59181 0.1252 0.2447 -0.23965 2020 11 29 59182 0.1232 0.2447 -0.24039 2020 11 30 59183 0.1211 0.2448 -0.24101 2020 12 1 59184 0.1191 0.2449 -0.24155 2020 12 2 59185 0.1171 0.2451 -0.24203 2020 12 3 59186 0.1150 0.2453 -0.24243 2020 12 4 59187 0.1130 0.2455 -0.24287 2020 12 5 59188 0.1110 0.2457 -0.24338 2020 12 6 59189 0.1090 0.2460 -0.24402 2020 12 7 59190 0.1069 0.2463 -0.24484 2020 12 8 59191 0.1049 0.2467 -0.24587 2020 12 9 59192 0.1029 0.2470 -0.24707 2020 12 10 59193 0.1009 0.2475 -0.24839 2020 12 11 59194 0.0989 0.2479 -0.24979 2020 12 12 59195 0.0970 0.2484 -0.25107 2020 12 13 59196 0.0950 0.2489 -0.25212 2020 12 14 59197 0.0930 0.2494 -0.25290 2020 12 15 59198 0.0911 0.2500 -0.25344 2020 12 16 59199 0.0891 0.2505 -0.25382 2020 12 17 59200 0.0872 0.2512 -0.25414 2020 12 18 59201 0.0853 0.2518 -0.25454 2020 12 19 59202 0.0833 0.2525 -0.25509 2020 12 20 59203 0.0814 0.2532 -0.25579 2020 12 21 59204 0.0796 0.2540 -0.25659 2020 12 22 59205 0.0777 0.2547 -0.25743 2020 12 23 59206 0.0758 0.2555 -0.25829 2020 12 24 59207 0.0740 0.2564 -0.25915 2020 12 25 59208 0.0721 0.2572 -0.25989 2020 12 26 59209 0.0703 0.2581 -0.26051 2020 12 27 59210 0.0685 0.2590 -0.26101 2020 12 28 59211 0.0668 0.2600 -0.26134 2020 12 29 59212 0.0650 0.2609 -0.26159 2020 12 30 59213 0.0632 0.2620 -0.26178 2020 12 31 59214 0.0615 0.2630 -0.26197 2021 1 1 59215 0.0598 0.2640 -0.26224 2021 1 2 59216 0.0581 0.2651 -0.26265 2021 1 3 59217 0.0565 0.2662 -0.26322 2021 1 4 59218 0.0548 0.2674 -0.26397 2021 1 5 59219 0.0532 0.2685 -0.26492 2021 1 6 59220 0.0516 0.2697 -0.26603 2021 1 7 59221 0.0500 0.2709 -0.26719 2021 1 8 59222 0.0484 0.2722 -0.26835 2021 1 9 59223 0.0469 0.2734 -0.26936 2021 1 10 59224 0.0454 0.2747 -0.27012 2021 1 11 59225 0.0439 0.2760 -0.27062 2021 1 12 59226 0.0424 0.2774 -0.27090 2021 1 13 59227 0.0410 0.2787 -0.27110 2021 1 14 59228 0.0396 0.2801 -0.27135 2021 1 15 59229 0.0382 0.2815 -0.27171 2021 1 16 59230 0.0368 0.2829 -0.27224 2021 1 17 59231 0.0355 0.2844 -0.27289 2021 1 18 59232 0.0342 0.2858 -0.27360 2021 1 19 59233 0.0329 0.2873 -0.27434 2021 1 20 59234 0.0316 0.2889 -0.27505 2021 1 21 59235 0.0304 0.2904 -0.27566 2021 1 22 59236 0.0292 0.2919 -0.27619 2021 1 23 59237 0.0281 0.2935 -0.27667 2021 1 24 59238 0.0269 0.2951 -0.27706 2021 1 25 59239 0.0258 0.2967 -0.27731 2021 1 26 59240 0.0247 0.2983 -0.27742 2021 1 27 59241 0.0237 0.3000 -0.27749 2021 1 28 59242 0.0227 0.3016 -0.27763 2021 1 29 59243 0.0217 0.3033 -0.27791 2021 1 30 59244 0.0207 0.3050 -0.27835 2021 1 31 59245 0.0198 0.3067 -0.27898 2021 2 1 59246 0.0189 0.3084 -0.27978 2021 2 2 59247 0.0180 0.3102 -0.28070 2021 2 3 59248 0.0172 0.3119 -0.28169 2021 2 4 59249 0.0164 0.3137 -0.28265 2021 2 5 59250 0.0157 0.3154 -0.28345 2021 2 6 59251 0.0149 0.3172 -0.28404 2021 2 7 59252 0.0142 0.3190 -0.28448 2021 2 8 59253 0.0136 0.3209 -0.28476 2021 2 9 59254 0.0130 0.3227 -0.28496 2021 2 10 59255 0.0124 0.3245 -0.28518 2021 2 11 59256 0.0118 0.3264 -0.28553 2021 2 12 59257 0.0113 0.3282 -0.28608 2021 2 13 59258 0.0108 0.3301 -0.28675 2021 2 14 59259 0.0103 0.3319 -0.28762 2021 2 15 59260 0.0099 0.3338 -0.28862 2021 2 16 59261 0.0095 0.3357 -0.28965 2021 2 17 59262 0.0092 0.3376 -0.29063 2021 2 18 59263 0.0089 0.3395 -0.29151 2021 2 19 59264 0.0086 0.3414 -0.29225 2021 2 20 59265 0.0084 0.3433 -0.29289 2021 2 21 59266 0.0082 0.3452 -0.29343 2021 2 22 59267 0.0080 0.3472 -0.29385 2021 2 23 59268 0.0079 0.3491 -0.29422 2021 2 24 59269 0.0078 0.3510 -0.29462 2021 2 25 59270 0.0077 0.3529 -0.29513 2021 2 26 59271 0.0077 0.3549 -0.29582 2021 2 27 59272 0.0077 0.3568 -0.29675 2021 2 28 59273 0.0078 0.3587 -0.29795 2021 3 1 59274 0.0079 0.3607 -0.29933 2021 3 2 59275 0.0080 0.3626 -0.30081 2021 3 3 59276 0.0081 0.3645 -0.30228 2021 3 4 59277 0.0083 0.3665 -0.30360 2021 3 5 59278 0.0086 0.3684 -0.30469 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) 58891 -106.99 0.47 -7.05 0.08 58892 -107.38 0.47 -7.08 0.08 58893 -107.80 0.47 -7.19 0.08 58894 -108.03 0.75 -7.25 0.05 58895 -108.12 0.72 -7.30 0.05 58896 -108.18 0.72 -7.35 0.05 58897 -108.20 0.66 -7.40 0.04 IERS Celestial Pole Offset Final Series MJD dpsi deps (msec. of arc) 58850 -108.7 -6.6 58851 -108.6 -6.6 58852 -108.6 -6.5 58853 -108.9 -6.3 58854 -109.2 -5.9 58855 -109.6 -5.7 58856 -110.0 -5.7 58857 -110.0 -6.0 58858 -109.7 -6.4 58859 -109.4 -6.7 58860 -108.9 -6.7 58861 -108.2 -6.4 58862 -107.9 -6.2 58863 -107.7 -6.2 58864 -107.8 -6.3 58865 -108.0 -6.4 58866 -108.4 -6.5 58867 -108.7 -6.4 58868 -109.1 -6.4 58869 -109.2 -6.4 58870 -109.0 -6.4 58871 -108.6 -6.4 58872 -108.2 -6.5 58873 -108.1 -6.6 58874 -108.1 -6.7 58875 -108.1 -6.7 58876 -108.2 -6.7 58877 -108.4 -6.8 58878 -108.4 -6.9 58879 -108.3 -7.0 58880 -108.0 -7.0 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 58891 0.185 0.189 -0.049 0.079 58892 0.191 0.189 -0.047 0.079 58893 0.203 0.189 -0.043 0.079 58894 0.216 0.297 -0.039 0.055 58895 0.230 0.288 -0.036 0.050 58896 0.245 0.288 -0.034 0.050 58897 0.259 0.264 -0.033 0.040 IAU2000A Celestial Pole Offset Final Series MJD dX dY (msec. of arc) 58850 0.35 0.08 58851 0.40 0.11 58852 0.35 0.12 58853 0.25 0.12 58854 0.16 0.12 58855 0.06 0.12 58856 -0.03 0.12 58857 0.01 0.10 58858 0.10 0.06 58859 0.13 0.05 58860 0.13 0.05 58861 0.14 0.05 58862 0.14 0.05 58863 0.17 0.02 58864 0.20 -0.03 58865 0.23 -0.07 58866 0.22 -0.06 58867 0.20 -0.03 58868 0.17 0.00 58869 0.15 0.03 58870 0.13 0.06 58871 0.14 0.07 58872 0.16 0.07 58873 0.17 0.07 58874 0.17 0.06 58875 0.18 0.05 58876 0.18 0.04 58877 0.19 0.04 58878 0.19 0.03 58879 0.20 0.02 58880 0.21 0.03 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).