********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 19 November 2020 Vol. XXXIII No. 047 ______________________________________________________________________ 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 31 December 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 no earlier * * than Autumn of 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 * * contact the USNO PAO Geoff Chester at email address directly * * 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. * * * * Until 31 Oct 2020, 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. * * * * Please note that CDDIS is reporting that as of 31 Oct 2020, all * * unencrypted ftp service will be permanently discontinued at CDDIS. * * * * 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 11 13 59166 0.14010 .00009 0.29026 .00009 -0.177159 0.000016 20 11 14 59167 0.13775 .00009 0.28966 .00009 -0.177983 0.000019 20 11 15 59168 0.13524 .00009 0.28897 .00009 -0.178636 0.000018 20 11 16 59169 0.13291 .00009 0.28846 .00009 -0.179025 0.000018 20 11 17 59170 0.13085 .00009 0.28799 .00009 -0.179134 0.000018 20 11 18 59171 0.12907 .00009 0.28740 .00009 -0.179047 0.000022 20 11 19 59172 0.12753 .00009 0.28683 .00009 -0.178867 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 = 0.1174 + 0.0025 cos A - 0.0921 sin A + 0.0114 cos C + 0.0109 sin C y = 0.3586 - 0.0851 cos A - 0.0029 sin A + 0.0109 cos C - 0.0114 sin C UT1-UTC = -0.1728 + 0.00001 (MJD - 59180) - (UT2-UT1) where A = 2*pi*(MJD-59172)/365.25 and C = 2*pi*(MJD-59172)/435. TAI-UTC(MJD 59173) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59172)**0.80 S t = 0.00025 (MJD-59172)**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 11 20 59173 0.1261 0.2864 -0.17865 2020 11 21 59174 0.1246 0.2862 -0.17848 2020 11 22 59175 0.1231 0.2860 -0.17844 2020 11 23 59176 0.1215 0.2859 -0.17856 2020 11 24 59177 0.1199 0.2859 -0.17880 2020 11 25 59178 0.1183 0.2859 -0.17910 2020 11 26 59179 0.1168 0.2858 -0.17941 2020 11 27 59180 0.1153 0.2857 -0.17967 2020 11 28 59181 0.1138 0.2857 -0.17986 2020 11 29 59182 0.1123 0.2858 -0.17995 2020 11 30 59183 0.1108 0.2858 -0.17988 2020 12 1 59184 0.1093 0.2859 -0.17964 2020 12 2 59185 0.1079 0.2861 -0.17928 2020 12 3 59186 0.1064 0.2862 -0.17884 2020 12 4 59187 0.1050 0.2864 -0.17838 2020 12 5 59188 0.1035 0.2867 -0.17800 2020 12 6 59189 0.1021 0.2869 -0.17778 2020 12 7 59190 0.1007 0.2872 -0.17776 2020 12 8 59191 0.0992 0.2875 -0.17797 2020 12 9 59192 0.0978 0.2879 -0.17840 2020 12 10 59193 0.0963 0.2882 -0.17898 2020 12 11 59194 0.0949 0.2886 -0.17959 2020 12 12 59195 0.0935 0.2890 -0.18009 2020 12 13 59196 0.0921 0.2895 -0.18039 2020 12 14 59197 0.0907 0.2900 -0.18045 2020 12 15 59198 0.0893 0.2905 -0.18029 2020 12 16 59199 0.0879 0.2910 -0.17999 2020 12 17 59200 0.0866 0.2915 -0.17965 2020 12 18 59201 0.0852 0.2921 -0.17935 2020 12 19 59202 0.0838 0.2927 -0.17913 2020 12 20 59203 0.0825 0.2933 -0.17901 2020 12 21 59204 0.0811 0.2939 -0.17898 2020 12 22 59205 0.0798 0.2946 -0.17900 2020 12 23 59206 0.0785 0.2953 -0.17903 2020 12 24 59207 0.0772 0.2960 -0.17903 2020 12 25 59208 0.0759 0.2967 -0.17894 2020 12 26 59209 0.0746 0.2974 -0.17873 2020 12 27 59210 0.0733 0.2982 -0.17837 2020 12 28 59211 0.0721 0.2990 -0.17787 2020 12 29 59212 0.0708 0.2998 -0.17726 2020 12 30 59213 0.0696 0.3006 -0.17656 2020 12 31 59214 0.0684 0.3015 -0.17585 2021 1 1 59215 0.0672 0.3024 -0.17520 2021 1 2 59216 0.0660 0.3033 -0.17468 2021 1 3 59217 0.0648 0.3042 -0.17437 2021 1 4 59218 0.0637 0.3051 -0.17428 2021 1 5 59219 0.0625 0.3061 -0.17439 2021 1 6 59220 0.0614 0.3071 -0.17465 2021 1 7 59221 0.0603 0.3081 -0.17495 2021 1 8 59222 0.0592 0.3091 -0.17518 2021 1 9 59223 0.0581 0.3101 -0.17524 2021 1 10 59224 0.0571 0.3112 -0.17507 2021 1 11 59225 0.0561 0.3122 -0.17467 2021 1 12 59226 0.0550 0.3133 -0.17411 2021 1 13 59227 0.0540 0.3144 -0.17348 2021 1 14 59228 0.0531 0.3156 -0.17290 2021 1 15 59229 0.0521 0.3167 -0.17242 2021 1 16 59230 0.0512 0.3178 -0.17209 2021 1 17 59231 0.0503 0.3190 -0.17190 2021 1 18 59232 0.0494 0.3202 -0.17180 2021 1 19 59233 0.0485 0.3214 -0.17176 2021 1 20 59234 0.0476 0.3226 -0.17174 2021 1 21 59235 0.0468 0.3239 -0.17167 2021 1 22 59236 0.0460 0.3251 -0.17153 2021 1 23 59237 0.0452 0.3264 -0.17129 2021 1 24 59238 0.0445 0.3277 -0.17092 2021 1 25 59239 0.0437 0.3290 -0.17046 2021 1 26 59240 0.0430 0.3303 -0.16991 2021 1 27 59241 0.0423 0.3316 -0.16934 2021 1 28 59242 0.0417 0.3329 -0.16881 2021 1 29 59243 0.0410 0.3343 -0.16841 2021 1 30 59244 0.0404 0.3356 -0.16822 2021 1 31 59245 0.0398 0.3370 -0.16828 2021 2 1 59246 0.0392 0.3384 -0.16856 2021 2 2 59247 0.0387 0.3398 -0.16901 2021 2 3 59248 0.0382 0.3412 -0.16951 2021 2 4 59249 0.0377 0.3426 -0.16996 2021 2 5 59250 0.0372 0.3440 -0.17025 2021 2 6 59251 0.0368 0.3454 -0.17033 2021 2 7 59252 0.0364 0.3468 -0.17020 2021 2 8 59253 0.0360 0.3483 -0.16990 2021 2 9 59254 0.0356 0.3497 -0.16953 2021 2 10 59255 0.0353 0.3512 -0.16918 2021 2 11 59256 0.0350 0.3527 -0.16893 2021 2 12 59257 0.0347 0.3541 -0.16884 2021 2 13 59258 0.0345 0.3556 -0.16890 2021 2 14 59259 0.0343 0.3571 -0.16909 2021 2 15 59260 0.0341 0.3586 -0.16936 2021 2 16 59261 0.0339 0.3601 -0.16965 2021 2 17 59262 0.0338 0.3616 -0.16992 2021 2 18 59263 0.0336 0.3631 -0.17010 2021 2 19 59264 0.0336 0.3646 -0.17017 2021 2 20 59265 0.0335 0.3661 -0.17012 2021 2 21 59266 0.0335 0.3676 -0.16995 2021 2 22 59267 0.0335 0.3691 -0.16969 2021 2 23 59268 0.0335 0.3707 -0.16939 2021 2 24 59269 0.0336 0.3722 -0.16913 2021 2 25 59270 0.0337 0.3737 -0.16899 2021 2 26 59271 0.0338 0.3752 -0.16905 2021 2 27 59272 0.0339 0.3767 -0.16938 2021 2 28 59273 0.0341 0.3783 -0.16999 2021 3 1 59274 0.0343 0.3798 -0.17082 2021 3 2 59275 0.0345 0.3813 -0.17177 2021 3 3 59276 0.0348 0.3828 -0.17270 2021 3 4 59277 0.0351 0.3843 -0.17348 2021 3 5 59278 0.0354 0.3858 -0.17405 2021 3 6 59279 0.0357 0.3873 -0.17439 2021 3 7 59280 0.0361 0.3888 -0.17454 2021 3 8 59281 0.0365 0.3903 -0.17451 2021 3 9 59282 0.0369 0.3918 -0.17448 2021 3 10 59283 0.0374 0.3933 -0.17452 2021 3 11 59284 0.0379 0.3948 -0.17470 2021 3 12 59285 0.0384 0.3963 -0.17504 2021 3 13 59286 0.0389 0.3978 -0.17552 2021 3 14 59287 0.0395 0.3992 -0.17610 2021 3 15 59288 0.0401 0.4007 -0.17673 2021 3 16 59289 0.0407 0.4021 -0.17734 2021 3 17 59290 0.0414 0.4036 -0.17788 2021 3 18 59291 0.0420 0.4050 -0.17830 2021 3 19 59292 0.0428 0.4064 -0.17859 2021 3 20 59293 0.0435 0.4079 -0.17874 2021 3 21 59294 0.0443 0.4093 -0.17877 2021 3 22 59295 0.0450 0.4107 -0.17873 2021 3 23 59296 0.0459 0.4120 -0.17868 2021 3 24 59297 0.0467 0.4134 -0.17870 2021 3 25 59298 0.0476 0.4148 -0.17888 2021 3 26 59299 0.0485 0.4161 -0.17929 2021 3 27 59300 0.0494 0.4175 -0.17998 2021 3 28 59301 0.0503 0.4188 -0.18094 2021 3 29 59302 0.0513 0.4201 -0.18207 2021 3 30 59303 0.0523 0.4214 -0.18324 2021 3 31 59304 0.0533 0.4227 -0.18428 2021 4 1 59305 0.0544 0.4239 -0.18509 2021 4 2 59306 0.0554 0.4252 -0.18562 2021 4 3 59307 0.0565 0.4264 -0.18591 2021 4 4 59308 0.0576 0.4277 -0.18604 2021 4 5 59309 0.0588 0.4289 -0.18612 2021 4 6 59310 0.0600 0.4301 -0.18625 2021 4 7 59311 0.0611 0.4312 -0.18648 2021 4 8 59312 0.0624 0.4324 -0.18685 2021 4 9 59313 0.0636 0.4335 -0.18736 2021 4 10 59314 0.0648 0.4346 -0.18797 2021 4 11 59315 0.0661 0.4357 -0.18863 2021 4 12 59316 0.0674 0.4368 -0.18928 2021 4 13 59317 0.0687 0.4379 -0.18986 2021 4 14 59318 0.0701 0.4389 -0.19033 2021 4 15 59319 0.0714 0.4400 -0.19065 2021 4 16 59320 0.0728 0.4410 -0.19081 2021 4 17 59321 0.0742 0.4419 -0.19082 2021 4 18 59322 0.0756 0.4429 -0.19074 2021 4 19 59323 0.0771 0.4439 -0.19061 2021 4 20 59324 0.0785 0.4448 -0.19049 2021 4 21 59325 0.0800 0.4457 -0.19049 2021 4 22 59326 0.0815 0.4465 -0.19066 2021 4 23 59327 0.0830 0.4474 -0.19109 2021 4 24 59328 0.0846 0.4482 -0.19179 2021 4 25 59329 0.0861 0.4490 -0.19271 2021 4 26 59330 0.0877 0.4498 -0.19375 2021 4 27 59331 0.0892 0.4506 -0.19473 2021 4 28 59332 0.0908 0.4513 -0.19553 2021 4 29 59333 0.0924 0.4521 -0.19604 2021 4 30 59334 0.0941 0.4527 -0.19626 2021 5 1 59335 0.0957 0.4534 -0.19627 2021 5 2 59336 0.0974 0.4541 -0.19616 2021 5 3 59337 0.0990 0.4547 -0.19607 2021 5 4 59338 0.1007 0.4553 -0.19605 2021 5 5 59339 0.1024 0.4558 -0.19615 2021 5 6 59340 0.1041 0.4564 -0.19637 2021 5 7 59341 0.1058 0.4569 -0.19669 2021 5 8 59342 0.1075 0.4574 -0.19705 2021 5 9 59343 0.1093 0.4578 -0.19741 2021 5 10 59344 0.1110 0.4583 -0.19770 2021 5 11 59345 0.1128 0.4587 -0.19787 2021 5 12 59346 0.1145 0.4591 -0.19788 2021 5 13 59347 0.1163 0.4594 -0.19773 2021 5 14 59348 0.1181 0.4598 -0.19740 2021 5 15 59349 0.1198 0.4601 -0.19694 2021 5 16 59350 0.1216 0.4604 -0.19640 2021 5 17 59351 0.1234 0.4606 -0.19583 2021 5 18 59352 0.1252 0.4608 -0.19531 2021 5 19 59353 0.1271 0.4610 -0.19492 2021 5 20 59354 0.1289 0.4612 -0.19471 2021 5 21 59355 0.1307 0.4613 -0.19472 2021 5 22 59356 0.1325 0.4614 -0.19493 2021 5 23 59357 0.1343 0.4615 -0.19528 2021 5 24 59358 0.1362 0.4616 -0.19563 2021 5 25 59359 0.1380 0.4616 -0.19584 2021 5 26 59360 0.1398 0.4616 -0.19578 2021 5 27 59361 0.1417 0.4616 -0.19542 2021 5 28 59362 0.1435 0.4615 -0.19479 2021 5 29 59363 0.1453 0.4614 -0.19402 2021 5 30 59364 0.1472 0.4613 -0.19324 2021 5 31 59365 0.1490 0.4612 -0.19256 2021 6 1 59366 0.1508 0.4610 -0.19207 2021 6 2 59367 0.1527 0.4608 -0.19176 2021 6 3 59368 0.1545 0.4606 -0.19162 2021 6 4 59369 0.1563 0.4603 -0.19160 2021 6 5 59370 0.1582 0.4601 -0.19163 2021 6 6 59371 0.1600 0.4597 -0.19166 2021 6 7 59372 0.1618 0.4594 -0.19164 2021 6 8 59373 0.1636 0.4590 -0.19150 2021 6 9 59374 0.1654 0.4586 -0.19123 2021 6 10 59375 0.1672 0.4582 -0.19081 2021 6 11 59376 0.1690 0.4578 -0.19026 2021 6 12 59377 0.1708 0.4573 -0.18961 2021 6 13 59378 0.1726 0.4568 -0.18894 2021 6 14 59379 0.1743 0.4563 -0.18830 2021 6 15 59380 0.1761 0.4557 -0.18777 2021 6 16 59381 0.1778 0.4551 -0.18739 2021 6 17 59382 0.1796 0.4545 -0.18722 2021 6 18 59383 0.1813 0.4539 -0.18724 2021 6 19 59384 0.1830 0.4532 -0.18741 2021 6 20 59385 0.1848 0.4525 -0.18761 2021 6 21 59386 0.1865 0.4518 -0.18773 2021 6 22 59387 0.1881 0.4510 -0.18765 2021 6 23 59388 0.1898 0.4502 -0.18731 2021 6 24 59389 0.1915 0.4494 -0.18671 2021 6 25 59390 0.1931 0.4486 -0.18591 2021 6 26 59391 0.1948 0.4478 -0.18501 2021 6 27 59392 0.1964 0.4469 -0.18414 2021 6 28 59393 0.1980 0.4460 -0.18338 2021 6 29 59394 0.1996 0.4450 -0.18273 2021 6 30 59395 0.2011 0.4441 -0.18215 2021 7 1 59396 0.2027 0.4431 -0.18158 2021 7 2 59397 0.2042 0.4421 -0.18101 2021 7 3 59398 0.2058 0.4411 -0.18037 2021 7 4 59399 0.2073 0.4400 -0.17962 2021 7 5 59400 0.2087 0.4390 -0.17872 2021 7 6 59401 0.2102 0.4379 -0.17767 2021 7 7 59402 0.2117 0.4367 -0.17653 2021 7 8 59403 0.2131 0.4356 -0.17528 2021 7 9 59404 0.2145 0.4344 -0.17394 2021 7 10 59405 0.2159 0.4332 -0.17253 2021 7 11 59406 0.2173 0.4320 -0.17118 2021 7 12 59407 0.2186 0.4308 -0.17005 2021 7 13 59408 0.2199 0.4295 -0.16919 2021 7 14 59409 0.2212 0.4283 -0.16863 2021 7 15 59410 0.2225 0.4270 -0.16832 2021 7 16 59411 0.2238 0.4257 -0.16821 2021 7 17 59412 0.2250 0.4243 -0.16821 2021 7 18 59413 0.2262 0.4230 -0.16816 2021 7 19 59414 0.2274 0.4216 -0.16797 2021 7 20 59415 0.2286 0.4202 -0.16754 2021 7 21 59416 0.2297 0.4188 -0.16686 2021 7 22 59417 0.2308 0.4174 -0.16594 2021 7 23 59418 0.2319 0.4159 -0.16489 2021 7 24 59419 0.2329 0.4145 -0.16381 2021 7 25 59420 0.2340 0.4130 -0.16281 2021 7 26 59421 0.2350 0.4115 -0.16194 2021 7 27 59422 0.2360 0.4100 -0.16117 2021 7 28 59423 0.2369 0.4084 -0.16047 2021 7 29 59424 0.2379 0.4069 -0.15982 2021 7 30 59425 0.2388 0.4053 -0.15911 2021 7 31 59426 0.2396 0.4038 -0.15830 2021 8 1 59427 0.2405 0.4022 -0.15739 2021 8 2 59428 0.2413 0.4006 -0.15635 2021 8 3 59429 0.2421 0.3990 -0.15521 2021 8 4 59430 0.2428 0.3973 -0.15391 2021 8 5 59431 0.2436 0.3957 -0.15257 2021 8 6 59432 0.2442 0.3940 -0.15128 2021 8 7 59433 0.2449 0.3924 -0.15007 2021 8 8 59434 0.2456 0.3907 -0.14903 2021 8 9 59435 0.2462 0.3890 -0.14825 2021 8 10 59436 0.2467 0.3873 -0.14773 2021 8 11 59437 0.2473 0.3856 -0.14744 2021 8 12 59438 0.2478 0.3839 -0.14738 2021 8 13 59439 0.2483 0.3822 -0.14744 2021 8 14 59440 0.2488 0.3805 -0.14749 2021 8 15 59441 0.2492 0.3787 -0.14751 2021 8 16 59442 0.2496 0.3770 -0.14738 2021 8 17 59443 0.2499 0.3752 -0.14701 2021 8 18 59444 0.2503 0.3735 -0.14645 2021 8 19 59445 0.2506 0.3717 -0.14584 2021 8 20 59446 0.2508 0.3699 -0.14528 2021 8 21 59447 0.2511 0.3682 -0.14481 2021 8 22 59448 0.2513 0.3664 -0.14448 2021 8 23 59449 0.2514 0.3646 -0.14435 2021 8 24 59450 0.2516 0.3628 -0.14433 2021 8 25 59451 0.2517 0.3610 -0.14442 2021 8 26 59452 0.2517 0.3593 -0.14451 2021 8 27 59453 0.2518 0.3575 -0.14453 2021 8 28 59454 0.2518 0.3557 -0.14444 2021 8 29 59455 0.2518 0.3539 -0.14421 2021 8 30 59456 0.2517 0.3521 -0.14384 2021 8 31 59457 0.2516 0.3503 -0.14339 2021 9 1 59458 0.2515 0.3485 -0.14287 2021 9 2 59459 0.2513 0.3467 -0.14230 2021 9 3 59460 0.2512 0.3449 -0.14166 2021 9 4 59461 0.2509 0.3431 -0.14101 2021 9 5 59462 0.2507 0.3414 -0.14049 2021 9 6 59463 0.2504 0.3396 -0.14020 2021 9 7 59464 0.2501 0.3378 -0.14013 2021 9 8 59465 0.2497 0.3360 -0.14030 2021 9 9 59466 0.2493 0.3343 -0.14063 2021 9 10 59467 0.2489 0.3325 -0.14096 2021 9 11 59468 0.2485 0.3308 -0.14125 2021 9 12 59469 0.2480 0.3290 -0.14142 2021 9 13 59470 0.2475 0.3273 -0.14142 2021 9 14 59471 0.2469 0.3255 -0.14122 2021 9 15 59472 0.2464 0.3238 -0.14088 2021 9 16 59473 0.2458 0.3221 -0.14048 2021 9 17 59474 0.2451 0.3204 -0.14017 2021 9 18 59475 0.2445 0.3187 -0.14008 2021 9 19 59476 0.2438 0.3170 -0.14023 2021 9 20 59477 0.2430 0.3153 -0.14057 2021 9 21 59478 0.2423 0.3136 -0.14106 2021 9 22 59479 0.2415 0.3120 -0.14166 2021 9 23 59480 0.2407 0.3103 -0.14226 2021 9 24 59481 0.2398 0.3087 -0.14283 2021 9 25 59482 0.2389 0.3071 -0.14333 2021 9 26 59483 0.2380 0.3055 -0.14377 2021 9 27 59484 0.2371 0.3039 -0.14411 2021 9 28 59485 0.2361 0.3023 -0.14432 2021 9 29 59486 0.2351 0.3007 -0.14448 2021 9 30 59487 0.2341 0.2992 -0.14463 2021 10 1 59488 0.2330 0.2977 -0.14483 2021 10 2 59489 0.2319 0.2961 -0.14520 2021 10 3 59490 0.2308 0.2946 -0.14580 2021 10 4 59491 0.2297 0.2931 -0.14671 2021 10 5 59492 0.2285 0.2917 -0.14790 2021 10 6 59493 0.2273 0.2902 -0.14927 2021 10 7 59494 0.2261 0.2888 -0.15068 2021 10 8 59495 0.2248 0.2874 -0.15197 2021 10 9 59496 0.2236 0.2860 -0.15292 2021 10 10 59497 0.2223 0.2846 -0.15354 2021 10 11 59498 0.2209 0.2833 -0.15385 2021 10 12 59499 0.2196 0.2819 -0.15393 2021 10 13 59500 0.2182 0.2806 -0.15391 2021 10 14 59501 0.2168 0.2793 -0.15387 2021 10 15 59502 0.2154 0.2780 -0.15390 2021 10 16 59503 0.2139 0.2768 -0.15409 2021 10 17 59504 0.2125 0.2756 -0.15449 2021 10 18 59505 0.2110 0.2744 -0.15505 2021 10 19 59506 0.2094 0.2732 -0.15572 2021 10 20 59507 0.2079 0.2720 -0.15652 2021 10 21 59508 0.2064 0.2709 -0.15734 2021 10 22 59509 0.2048 0.2698 -0.15801 2021 10 23 59510 0.2032 0.2687 -0.15855 2021 10 24 59511 0.2015 0.2676 -0.15898 2021 10 25 59512 0.1999 0.2666 -0.15926 2021 10 26 59513 0.1982 0.2656 -0.15944 2021 10 27 59514 0.1966 0.2646 -0.15956 2021 10 28 59515 0.1949 0.2636 -0.15969 2021 10 29 59516 0.1931 0.2627 -0.15992 2021 10 30 59517 0.1914 0.2618 -0.16030 2021 10 31 59518 0.1897 0.2609 -0.16088 2021 11 1 59519 0.1879 0.2600 -0.16169 2021 11 2 59520 0.1861 0.2592 -0.16272 2021 11 3 59521 0.1843 0.2584 -0.16386 2021 11 4 59522 0.1825 0.2576 -0.16496 2021 11 5 59523 0.1807 0.2569 -0.16587 2021 11 6 59524 0.1788 0.2562 -0.16653 2021 11 7 59525 0.1770 0.2555 -0.16685 2021 11 8 59526 0.1751 0.2548 -0.16685 2021 11 9 59527 0.1732 0.2542 -0.16674 2021 11 10 59528 0.1713 0.2536 -0.16664 2021 11 11 59529 0.1694 0.2530 -0.16667 2021 11 12 59530 0.1675 0.2525 -0.16686 2021 11 13 59531 0.1656 0.2519 -0.16720 2021 11 14 59532 0.1636 0.2515 -0.16767 2021 11 15 59533 0.1617 0.2510 -0.16819 2021 11 16 59534 0.1597 0.2506 -0.16878 2021 11 17 59535 0.1578 0.2502 -0.16936 2021 11 18 59536 0.1558 0.2498 -0.16982 2021 11 19 59537 0.1538 0.2495 -0.17010 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) 59150 -113.95 0.55 -8.02 0.17 59151 -113.80 0.55 -7.78 0.17 59152 -113.71 0.55 -7.52 0.17 59153 -113.59 0.71 -7.39 0.16 59154 -113.42 0.71 -7.45 0.16 59155 -113.27 0.66 -7.59 0.14 59156 -113.17 0.53 -7.71 0.06 59157 -113.16 0.53 -7.78 0.06 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 59150 0.214 0.219 0.021 0.172 59151 0.227 0.219 0.028 0.172 59152 0.237 0.219 0.038 0.172 59153 0.242 0.283 0.046 0.165 59154 0.244 0.283 0.054 0.165 59155 0.243 0.263 0.061 0.141 59156 0.240 0.211 0.068 0.062 59157 0.236 0.211 0.074 0.062 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).