********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 9 January 2020 Vol. XXXIII No. 002 ______________________________________________________________________ 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 *********************************************************************** * * * There will NOT be a leap second introduced * * in UTC on 30 June 2020 * * * * 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 3 58851 0.07278 .00009 0.28321 .00009 -0.178121 0.000014 20 1 4 58852 0.07133 .00009 0.28399 .00009 -0.178587 0.000022 20 1 5 58853 0.07000 .00009 0.28475 .00009 -0.179085 0.000029 20 1 6 58854 0.06838 .00009 0.28520 .00009 -0.179445 0.000034 20 1 7 58855 0.06661 .00009 0.28550 .00009 -0.179564 0.000035 20 1 8 58856 0.06496 .00009 0.28595 .00009 -0.179551 0.000040 20 1 9 58857 0.06354 .00009 0.28656 .00009 -0.179486 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 = 0.1206 - 0.0629 cos A - 0.0813 sin A + 0.0067 cos C + 0.0153 sin C y = 0.3449 - 0.0732 cos A + 0.0596 sin A + 0.0153 cos C - 0.0067 sin C UT1-UTC = -0.1711 - 0.00031 (MJD - 58865) - (UT2-UT1) where A = 2*pi*(MJD-58857)/365.25 and C = 2*pi*(MJD-58857)/435. TAI-UTC(MJD 58858) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58857)**0.80 S t = 0.00025 (MJD-58857)**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 10 58858 0.0622 0.2873 -0.17930 2020 1 11 58859 0.0610 0.2882 -0.17911 2020 1 12 58860 0.0598 0.2891 -0.17905 2020 1 13 58861 0.0586 0.2901 -0.17922 2020 1 14 58862 0.0574 0.2912 -0.17967 2020 1 15 58863 0.0562 0.2923 -0.18041 2020 1 16 58864 0.0550 0.2934 -0.18135 2020 1 17 58865 0.0538 0.2945 -0.18236 2020 1 18 58866 0.0527 0.2956 -0.18329 2020 1 19 58867 0.0516 0.2968 -0.18401 2020 1 20 58868 0.0505 0.2980 -0.18443 2020 1 21 58869 0.0495 0.2993 -0.18458 2020 1 22 58870 0.0485 0.3005 -0.18455 2020 1 23 58871 0.0474 0.3018 -0.18441 2020 1 24 58872 0.0464 0.3032 -0.18427 2020 1 25 58873 0.0455 0.3045 -0.18420 2020 1 26 58874 0.0445 0.3059 -0.18425 2020 1 27 58875 0.0436 0.3072 -0.18442 2020 1 28 58876 0.0427 0.3086 -0.18473 2020 1 29 58877 0.0418 0.3100 -0.18515 2020 1 30 58878 0.0409 0.3114 -0.18564 2020 1 31 58879 0.0401 0.3128 -0.18616 2020 2 1 58880 0.0393 0.3142 -0.18665 2020 2 2 58881 0.0386 0.3156 -0.18707 2020 2 3 58882 0.0378 0.3171 -0.18739 2020 2 4 58883 0.0371 0.3186 -0.18760 2020 2 5 58884 0.0364 0.3201 -0.18769 2020 2 6 58885 0.0358 0.3215 -0.18770 2020 2 7 58886 0.0351 0.3231 -0.18769 2020 2 8 58887 0.0345 0.3246 -0.18776 2020 2 9 58888 0.0340 0.3261 -0.18799 2020 2 10 58889 0.0334 0.3276 -0.18846 2020 2 11 58890 0.0329 0.3292 -0.18918 2020 2 12 58891 0.0325 0.3307 -0.19008 2020 2 13 58892 0.0320 0.3323 -0.19106 2020 2 14 58893 0.0316 0.3339 -0.19198 2020 2 15 58894 0.0312 0.3354 -0.19276 2020 2 16 58895 0.0309 0.3370 -0.19332 2020 2 17 58896 0.0305 0.3386 -0.19366 2020 2 18 58897 0.0302 0.3402 -0.19382 2020 2 19 58898 0.0300 0.3418 -0.19387 2020 2 20 58899 0.0297 0.3434 -0.19388 2020 2 21 58900 0.0295 0.3451 -0.19391 2020 2 22 58901 0.0294 0.3467 -0.19401 2020 2 23 58902 0.0292 0.3483 -0.19422 2020 2 24 58903 0.0291 0.3499 -0.19454 2020 2 25 58904 0.0290 0.3516 -0.19497 2020 2 26 58905 0.0290 0.3532 -0.19548 2020 2 27 58906 0.0290 0.3548 -0.19604 2020 2 28 58907 0.0290 0.3565 -0.19661 2020 2 29 58908 0.0290 0.3581 -0.19714 2020 3 1 58909 0.0291 0.3598 -0.19759 2020 3 2 58910 0.0292 0.3614 -0.19795 2020 3 3 58911 0.0294 0.3630 -0.19822 2020 3 4 58912 0.0295 0.3647 -0.19840 2020 3 5 58913 0.0297 0.3663 -0.19854 2020 3 6 58914 0.0300 0.3680 -0.19870 2020 3 7 58915 0.0302 0.3696 -0.19899 2020 3 8 58916 0.0305 0.3712 -0.19949 2020 3 9 58917 0.0309 0.3728 -0.20025 2020 3 10 58918 0.0312 0.3745 -0.20126 2020 3 11 58919 0.0316 0.3761 -0.20242 2020 3 12 58920 0.0320 0.3777 -0.20359 2020 3 13 58921 0.0325 0.3793 -0.20464 2020 3 14 58922 0.0330 0.3809 -0.20547 2020 3 15 58923 0.0335 0.3825 -0.20604 2020 3 16 58924 0.0340 0.3841 -0.20639 2020 3 17 58925 0.0346 0.3857 -0.20657 2020 3 18 58926 0.0352 0.3872 -0.20666 2020 3 19 58927 0.0358 0.3888 -0.20675 2020 3 20 58928 0.0365 0.3903 -0.20690 2020 3 21 58929 0.0372 0.3919 -0.20714 2020 3 22 58930 0.0379 0.3934 -0.20751 2020 3 23 58931 0.0387 0.3949 -0.20799 2020 3 24 58932 0.0394 0.3965 -0.20858 2020 3 25 58933 0.0402 0.3980 -0.20924 2020 3 26 58934 0.0411 0.3995 -0.20993 2020 3 27 58935 0.0420 0.4009 -0.21059 2020 3 28 58936 0.0428 0.4024 -0.21117 2020 3 29 58937 0.0438 0.4039 -0.21167 2020 3 30 58938 0.0447 0.4053 -0.21205 2020 3 31 58939 0.0457 0.4067 -0.21234 2020 4 1 58940 0.0467 0.4081 -0.21257 2020 4 2 58941 0.0477 0.4095 -0.21279 2020 4 3 58942 0.0488 0.4109 -0.21311 2020 4 4 58943 0.0499 0.4123 -0.21360 2020 4 5 58944 0.0510 0.4136 -0.21436 2020 4 6 58945 0.0521 0.4149 -0.21539 2020 4 7 58946 0.0533 0.4163 -0.21665 2020 4 8 58947 0.0545 0.4176 -0.21803 2020 4 9 58948 0.0557 0.4188 -0.21937 2020 4 10 58949 0.0569 0.4201 -0.22052 2020 4 11 58950 0.0582 0.4213 -0.22143 2020 4 12 58951 0.0594 0.4226 -0.22207 2020 4 13 58952 0.0607 0.4238 -0.22250 2020 4 14 58953 0.0621 0.4249 -0.22280 2020 4 15 58954 0.0634 0.4261 -0.22307 2020 4 16 58955 0.0648 0.4272 -0.22336 2020 4 17 58956 0.0662 0.4284 -0.22372 2020 4 18 58957 0.0676 0.4295 -0.22418 2020 4 19 58958 0.0690 0.4305 -0.22475 2020 4 20 58959 0.0705 0.4316 -0.22541 2020 4 21 58960 0.0720 0.4326 -0.22613 2020 4 22 58961 0.0735 0.4336 -0.22687 2020 4 23 58962 0.0750 0.4346 -0.22757 2020 4 24 58963 0.0765 0.4356 -0.22820 2020 4 25 58964 0.0781 0.4365 -0.22872 2020 4 26 58965 0.0797 0.4374 -0.22911 2020 4 27 58966 0.0812 0.4383 -0.22933 2020 4 28 58967 0.0828 0.4392 -0.22944 2020 4 29 58968 0.0845 0.4400 -0.22952 2020 4 30 58969 0.0861 0.4409 -0.22962 2020 5 1 58970 0.0878 0.4417 -0.22985 2020 5 2 58971 0.0894 0.4424 -0.23027 2020 5 3 58972 0.0911 0.4432 -0.23094 2020 5 4 58973 0.0928 0.4439 -0.23184 2020 5 5 58974 0.0945 0.4446 -0.23291 2020 5 6 58975 0.0962 0.4452 -0.23400 2020 5 7 58976 0.0980 0.4459 -0.23498 2020 5 8 58977 0.0997 0.4465 -0.23574 2020 5 9 58978 0.1015 0.4470 -0.23621 2020 5 10 58979 0.1033 0.4476 -0.23644 2020 5 11 58980 0.1050 0.4481 -0.23648 2020 5 12 58981 0.1068 0.4486 -0.23643 2020 5 13 58982 0.1086 0.4491 -0.23637 2020 5 14 58983 0.1105 0.4495 -0.23636 2020 5 15 58984 0.1123 0.4499 -0.23644 2020 5 16 58985 0.1141 0.4503 -0.23660 2020 5 17 58986 0.1159 0.4507 -0.23685 2020 5 18 58987 0.1178 0.4510 -0.23715 2020 5 19 58988 0.1196 0.4513 -0.23747 2020 5 20 58989 0.1215 0.4516 -0.23777 2020 5 21 58990 0.1233 0.4518 -0.23798 2020 5 22 58991 0.1252 0.4520 -0.23809 2020 5 23 58992 0.1271 0.4522 -0.23805 2020 5 24 58993 0.1289 0.4524 -0.23787 2020 5 25 58994 0.1308 0.4525 -0.23758 2020 5 26 58995 0.1327 0.4526 -0.23721 2020 5 27 58996 0.1346 0.4526 -0.23685 2020 5 28 58997 0.1365 0.4527 -0.23658 2020 5 29 58998 0.1383 0.4527 -0.23646 2020 5 30 58999 0.1402 0.4526 -0.23655 2020 5 31 59000 0.1421 0.4526 -0.23686 2020 6 1 59001 0.1440 0.4525 -0.23734 2020 6 2 59002 0.1459 0.4524 -0.23789 2020 6 3 59003 0.1477 0.4522 -0.23838 2020 6 4 59004 0.1496 0.4521 -0.23872 2020 6 5 59005 0.1515 0.4519 -0.23880 2020 6 6 59006 0.1534 0.4516 -0.23864 2020 6 7 59007 0.1552 0.4514 -0.23826 2020 6 8 59008 0.1571 0.4511 -0.23776 2020 6 9 59009 0.1589 0.4508 -0.23723 2020 6 10 59010 0.1608 0.4504 -0.23673 2020 6 11 59011 0.1626 0.4500 -0.23632 2020 6 12 59012 0.1645 0.4496 -0.23599 2020 6 13 59013 0.1663 0.4492 -0.23576 2020 6 14 59014 0.1681 0.4487 -0.23560 2020 6 15 59015 0.1699 0.4482 -0.23546 2020 6 16 59016 0.1717 0.4477 -0.23531 2020 6 17 59017 0.1735 0.4471 -0.23510 2020 6 18 59018 0.1753 0.4465 -0.23479 2020 6 19 59019 0.1770 0.4459 -0.23436 2020 6 20 59020 0.1788 0.4453 -0.23378 2020 6 21 59021 0.1806 0.4446 -0.23308 2020 6 22 59022 0.1823 0.4439 -0.23230 2020 6 23 59023 0.1840 0.4432 -0.23150 2020 6 24 59024 0.1857 0.4425 -0.23077 2020 6 25 59025 0.1874 0.4417 -0.23019 2020 6 26 59026 0.1891 0.4409 -0.22981 2020 6 27 59027 0.1908 0.4400 -0.22963 2020 6 28 59028 0.1924 0.4392 -0.22962 2020 6 29 59029 0.1940 0.4383 -0.22968 2020 6 30 59030 0.1957 0.4374 -0.22971 2020 7 1 59031 0.1973 0.4364 -0.22961 2020 7 2 59032 0.1988 0.4355 -0.22930 2020 7 3 59033 0.2004 0.4345 -0.22874 2020 7 4 59034 0.2019 0.4335 -0.22796 2020 7 5 59035 0.2035 0.4324 -0.22703 2020 7 6 59036 0.2050 0.4314 -0.22603 2020 7 7 59037 0.2065 0.4303 -0.22503 2020 7 8 59038 0.2079 0.4292 -0.22408 2020 7 9 59039 0.2094 0.4280 -0.22321 2020 7 10 59040 0.2108 0.4269 -0.22241 2020 7 11 59041 0.2122 0.4257 -0.22165 2020 7 12 59042 0.2136 0.4245 -0.22090 2020 7 13 59043 0.2150 0.4233 -0.22011 2020 7 14 59044 0.2163 0.4220 -0.21925 2020 7 15 59045 0.2176 0.4208 -0.21828 2020 7 16 59046 0.2189 0.4195 -0.21721 2020 7 17 59047 0.2202 0.4182 -0.21603 2020 7 18 59048 0.2214 0.4168 -0.21477 2020 7 19 59049 0.2226 0.4155 -0.21351 2020 7 20 59050 0.2238 0.4141 -0.21230 2020 7 21 59051 0.2250 0.4127 -0.21122 2020 7 22 59052 0.2261 0.4113 -0.21036 2020 7 23 59053 0.2272 0.4099 -0.20976 2020 7 24 59054 0.2283 0.4084 -0.20942 2020 7 25 59055 0.2294 0.4069 -0.20930 2020 7 26 59056 0.2304 0.4055 -0.20930 2020 7 27 59057 0.2314 0.4040 -0.20930 2020 7 28 59058 0.2324 0.4024 -0.20920 2020 7 29 59059 0.2333 0.4009 -0.20893 2020 7 30 59060 0.2343 0.3994 -0.20846 2020 7 31 59061 0.2351 0.3978 -0.20781 2020 8 1 59062 0.2360 0.3962 -0.20704 2020 8 2 59063 0.2368 0.3946 -0.20625 2020 8 3 59064 0.2376 0.3930 -0.20550 2020 8 4 59065 0.2384 0.3914 -0.20487 2020 8 5 59066 0.2391 0.3898 -0.20439 2020 8 6 59067 0.2399 0.3881 -0.20407 2020 8 7 59068 0.2405 0.3865 -0.20390 2020 8 8 59069 0.2412 0.3848 -0.20382 2020 8 9 59070 0.2418 0.3831 -0.20381 2020 8 10 59071 0.2424 0.3814 -0.20381 2020 8 11 59072 0.2430 0.3797 -0.20378 2020 8 12 59073 0.2435 0.3780 -0.20371 2020 8 13 59074 0.2440 0.3763 -0.20358 2020 8 14 59075 0.2444 0.3746 -0.20336 2020 8 15 59076 0.2449 0.3729 -0.20308 2020 8 16 59077 0.2453 0.3711 -0.20276 2020 8 17 59078 0.2456 0.3694 -0.20247 2020 8 18 59079 0.2459 0.3676 -0.20229 2020 8 19 59080 0.2462 0.3659 -0.20231 2020 8 20 59081 0.2465 0.3641 -0.20258 2020 8 21 59082 0.2467 0.3623 -0.20313 2020 8 22 59083 0.2469 0.3605 -0.20384 2020 8 23 59084 0.2471 0.3588 -0.20456 2020 8 24 59085 0.2472 0.3570 -0.20518 2020 8 25 59086 0.2473 0.3552 -0.20561 2020 8 26 59087 0.2474 0.3534 -0.20579 2020 8 27 59088 0.2474 0.3516 -0.20576 2020 8 28 59089 0.2474 0.3498 -0.20562 2020 8 29 59090 0.2474 0.3480 -0.20544 2020 8 30 59091 0.2473 0.3462 -0.20533 2020 8 31 59092 0.2472 0.3445 -0.20530 2020 9 1 59093 0.2471 0.3427 -0.20536 2020 9 2 59094 0.2469 0.3409 -0.20556 2020 9 3 59095 0.2467 0.3391 -0.20591 2020 9 4 59096 0.2465 0.3373 -0.20632 2020 9 5 59097 0.2462 0.3355 -0.20675 2020 9 6 59098 0.2459 0.3338 -0.20720 2020 9 7 59099 0.2456 0.3320 -0.20759 2020 9 8 59100 0.2452 0.3302 -0.20793 2020 9 9 59101 0.2448 0.3285 -0.20821 2020 9 10 59102 0.2444 0.3267 -0.20839 2020 9 11 59103 0.2439 0.3249 -0.20852 2020 9 12 59104 0.2434 0.3232 -0.20860 2020 9 13 59105 0.2429 0.3215 -0.20868 2020 9 14 59106 0.2423 0.3197 -0.20882 2020 9 15 59107 0.2417 0.3180 -0.20915 2020 9 16 59108 0.2411 0.3163 -0.20980 2020 9 17 59109 0.2404 0.3146 -0.21072 2020 9 18 59110 0.2397 0.3129 -0.21195 2020 9 19 59111 0.2390 0.3112 -0.21330 2020 9 20 59112 0.2382 0.3096 -0.21458 2020 9 21 59113 0.2374 0.3079 -0.21566 2020 9 22 59114 0.2366 0.3063 -0.21643 2020 9 23 59115 0.2358 0.3046 -0.21694 2020 9 24 59116 0.2349 0.3030 -0.21727 2020 9 25 59117 0.2340 0.3014 -0.21750 2020 9 26 59118 0.2330 0.2998 -0.21776 2020 9 27 59119 0.2321 0.2982 -0.21808 2020 9 28 59120 0.2311 0.2966 -0.21847 2020 9 29 59121 0.2300 0.2951 -0.21898 2020 9 30 59122 0.2290 0.2936 -0.21959 2020 10 1 59123 0.2279 0.2920 -0.22027 2020 10 2 59124 0.2268 0.2905 -0.22102 2020 10 3 59125 0.2256 0.2891 -0.22185 2020 10 4 59126 0.2245 0.2876 -0.22270 2020 10 5 59127 0.2233 0.2861 -0.22344 2020 10 6 59128 0.2220 0.2847 -0.22402 2020 10 7 59129 0.2208 0.2833 -0.22446 2020 10 8 59130 0.2195 0.2819 -0.22483 2020 10 9 59131 0.2182 0.2805 -0.22513 2020 10 10 59132 0.2169 0.2792 -0.22537 2020 10 11 59133 0.2155 0.2779 -0.22563 2020 10 12 59134 0.2141 0.2765 -0.22598 2020 10 13 59135 0.2127 0.2753 -0.22653 2020 10 14 59136 0.2113 0.2740 -0.22738 2020 10 15 59137 0.2098 0.2727 -0.22852 2020 10 16 59138 0.2083 0.2715 -0.22985 2020 10 17 59139 0.2068 0.2703 -0.23121 2020 10 18 59140 0.2053 0.2692 -0.23253 2020 10 19 59141 0.2038 0.2680 -0.23363 2020 10 20 59142 0.2022 0.2669 -0.23445 2020 10 21 59143 0.2006 0.2658 -0.23501 2020 10 22 59144 0.1990 0.2647 -0.23545 2020 10 23 59145 0.1974 0.2636 -0.23589 2020 10 24 59146 0.1957 0.2626 -0.23632 2020 10 25 59147 0.1941 0.2616 -0.23692 2020 10 26 59148 0.1924 0.2606 -0.23768 2020 10 27 59149 0.1907 0.2597 -0.23859 2020 10 28 59150 0.1889 0.2588 -0.23956 2020 10 29 59151 0.1872 0.2579 -0.24059 2020 10 30 59152 0.1854 0.2570 -0.24160 2020 10 31 59153 0.1837 0.2562 -0.24262 2020 11 1 59154 0.1819 0.2554 -0.24358 2020 11 2 59155 0.1801 0.2546 -0.24438 2020 11 3 59156 0.1782 0.2538 -0.24505 2020 11 4 59157 0.1764 0.2531 -0.24561 2020 11 5 59158 0.1745 0.2524 -0.24605 2020 11 6 59159 0.1727 0.2517 -0.24644 2020 11 7 59160 0.1708 0.2511 -0.24682 2020 11 8 59161 0.1689 0.2505 -0.24731 2020 11 9 59162 0.1670 0.2499 -0.24795 2020 11 10 59163 0.1651 0.2494 -0.24882 2020 11 11 59164 0.1632 0.2488 -0.24999 2020 11 12 59165 0.1613 0.2484 -0.25138 2020 11 13 59166 0.1593 0.2479 -0.25287 2020 11 14 59167 0.1574 0.2475 -0.25433 2020 11 15 59168 0.1554 0.2471 -0.25557 2020 11 16 59169 0.1534 0.2467 -0.25656 2020 11 17 59170 0.1515 0.2464 -0.25729 2020 11 18 59171 0.1495 0.2461 -0.25780 2020 11 19 59172 0.1475 0.2458 -0.25822 2020 11 20 59173 0.1455 0.2456 -0.25862 2020 11 21 59174 0.1435 0.2454 -0.25903 2020 11 22 59175 0.1415 0.2452 -0.25954 2020 11 23 59176 0.1395 0.2450 -0.26016 2020 11 24 59177 0.1375 0.2449 -0.26090 2020 11 25 59178 0.1355 0.2449 -0.26170 2020 11 26 59179 0.1335 0.2448 -0.26247 2020 11 27 59180 0.1315 0.2448 -0.26319 2020 11 28 59181 0.1295 0.2448 -0.26387 2020 11 29 59182 0.1275 0.2449 -0.26442 2020 11 30 59183 0.1254 0.2449 -0.26483 2020 12 1 59184 0.1234 0.2450 -0.26512 2020 12 2 59185 0.1214 0.2452 -0.26529 2020 12 3 59186 0.1194 0.2454 -0.26544 2020 12 4 59187 0.1174 0.2456 -0.26554 2020 12 5 59188 0.1154 0.2458 -0.26572 2020 12 6 59189 0.1134 0.2461 -0.26607 2020 12 7 59190 0.1114 0.2464 -0.26662 2020 12 8 59191 0.1094 0.2467 -0.26746 2020 12 9 59192 0.1074 0.2471 -0.26851 2020 12 10 59193 0.1055 0.2475 -0.26977 2020 12 11 59194 0.1035 0.2479 -0.27107 2020 12 12 59195 0.1015 0.2484 -0.27229 2020 12 13 59196 0.0996 0.2489 -0.27336 2020 12 14 59197 0.0976 0.2494 -0.27423 2020 12 15 59198 0.0957 0.2500 -0.27489 2020 12 16 59199 0.0938 0.2506 -0.27543 2020 12 17 59200 0.0919 0.2512 -0.27598 2020 12 18 59201 0.0900 0.2519 -0.27661 2020 12 19 59202 0.0881 0.2525 -0.27734 2020 12 20 59203 0.0862 0.2533 -0.27821 2020 12 21 59204 0.0843 0.2540 -0.27916 2020 12 22 59205 0.0825 0.2548 -0.28014 2020 12 23 59206 0.0806 0.2556 -0.28115 2020 12 24 59207 0.0788 0.2564 -0.28213 2020 12 25 59208 0.0770 0.2573 -0.28304 2020 12 26 59209 0.0752 0.2582 -0.28385 2020 12 27 59210 0.0734 0.2591 -0.28456 2020 12 28 59211 0.0717 0.2600 -0.28512 2020 12 29 59212 0.0699 0.2610 -0.28557 2020 12 30 59213 0.0682 0.2620 -0.28586 2020 12 31 59214 0.0665 0.2631 -0.28609 2021 1 1 59215 0.0648 0.2641 -0.28642 2021 1 2 59216 0.0631 0.2652 -0.28688 2021 1 3 59217 0.0615 0.2663 -0.28759 2021 1 4 59218 0.0599 0.2675 -0.28856 2021 1 5 59219 0.0582 0.2687 -0.28974 2021 1 6 59220 0.0567 0.2699 -0.29112 2021 1 7 59221 0.0551 0.2711 -0.29251 2021 1 8 59222 0.0535 0.2723 -0.29379 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) 58831 -110.17 0.22 -6.65 0.07 58832 -109.78 0.22 -6.56 0.07 58833 -109.46 0.35 -6.43 0.12 58834 -109.18 0.76 -6.35 0.21 58835 -108.95 0.55 -6.34 0.15 58836 -108.83 0.55 -6.32 0.15 58837 -108.93 0.55 -6.27 0.15 58838 -109.30 0.55 -6.25 0.15 58839 -109.78 0.32 -6.32 0.00 58840 -110.11 0.32 -6.45 0.00 58841 -110.12 0.32 -6.55 0.16 58842 -109.81 0.37 -6.54 0.27 58843 -109.36 0.37 -6.47 0.27 58844 -108.95 0.37 -6.39 0.27 58845 -108.61 0.37 -6.35 0.27 58846 -108.28 0.77 -6.28 0.19 58847 -107.94 0.77 -6.16 0.19 58848 -107.62 1.06 -6.01 0.03 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 58831 0.117 0.089 0.108 0.071 58832 0.128 0.089 0.110 0.071 58833 0.141 0.141 0.111 0.119 58834 0.153 0.302 0.109 0.214 58835 0.163 0.217 0.102 0.147 58836 0.169 0.217 0.091 0.147 58837 0.172 0.217 0.076 0.147 58838 0.174 0.217 0.060 0.147 58839 0.178 0.129 0.046 0.005 58840 0.186 0.129 0.037 0.005 58841 0.201 0.128 0.036 0.160 58842 0.225 0.148 0.046 0.270 58843 0.261 0.148 0.070 0.270 58844 0.311 0.148 0.110 0.270 58845 0.378 0.148 0.170 0.270 58846 0.463 0.307 0.252 0.192 58847 0.570 0.307 0.360 0.192 58848 0.701 0.423 0.496 0.029 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).