********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 7 January 2021 Vol. XXXIV No. 001 ______________________________________________________________________ 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 at the end of June 2021 * * * * 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. * * * * 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, * * unencrypted FTP service has been permanently discontinued at CDDIS. * * * * For other download options from CDDIS, such as HTTPS or FTP-SSL, * * please refer to: * * 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 21 1 1 59215 0.06870 .00009 0.30420 .00009 -0.175360 0.000008 21 1 2 59216 0.06765 .00009 0.30545 .00009 -0.174830 0.000009 21 1 3 59217 0.06601 .00009 0.30672 .00009 -0.174478 0.000011 21 1 4 59218 0.06387 .00009 0.30778 .00009 -0.174333 0.000011 21 1 5 59219 0.06186 .00009 0.30867 .00009 -0.174384 0.000011 21 1 6 59220 0.06046 .00009 0.30952 .00009 -0.174597 0.000011 21 1 7 59221 0.05949 .00009 0.31033 .00009 -0.174879 0.000055 IERS Final Values MJD x y UT1-UTC " " s 20 11 2 59155 0.1568 0.2966 -0.17549 20 11 3 59156 0.1550 0.2961 -0.17555 20 11 4 59157 0.1538 0.2954 -0.17550 20 11 5 59158 0.1531 0.2946 -0.17532 20 11 6 59159 0.1522 0.2935 -0.17505 20 11 7 59160 0.1509 0.2927 -0.17473 20 11 8 59161 0.1493 0.2924 -0.17454 20 11 9 59162 0.1478 0.2921 -0.17458 20 11 10 59163 0.1462 0.2916 -0.17489 20 11 11 59164 0.1441 0.2912 -0.17549 20 11 12 59165 0.1421 0.2906 -0.17628 20 11 13 59166 0.1402 0.2903 -0.17715 20 11 14 59167 0.1378 0.2896 -0.17797 20 11 15 59168 0.1352 0.2890 -0.17862 20 11 16 59169 0.1329 0.2884 -0.17901 20 11 17 59170 0.1308 0.2881 -0.17913 20 11 18 59171 0.1290 0.2873 -0.17902 20 11 19 59172 0.1275 0.2868 -0.17875 20 11 20 59173 0.1263 0.2866 -0.17844 20 11 21 59174 0.1251 0.2869 -0.17818 20 11 22 59175 0.1246 0.2859 -0.17807 20 11 23 59176 0.1246 0.2858 -0.17813 20 11 24 59177 0.1237 0.2863 -0.17834 20 11 25 59178 0.1226 0.2868 -0.17862 20 11 26 59179 0.1210 0.2876 -0.17896 20 11 27 59180 0.1189 0.2879 -0.17917 20 11 28 59181 0.1162 0.2882 -0.17931 20 11 29 59182 0.1136 0.2882 -0.17930 20 11 30 59183 0.1111 0.2887 -0.17920 20 12 1 59184 0.1085 0.2881 -0.17900 _______________________________________________________________________ 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 = 0.1226 - 0.0767 cos A - 0.0758 sin A + 0.0159 cos C + 0.0159 sin C y = 0.3663 - 0.0691 cos A + 0.0688 sin A + 0.0159 cos C - 0.0159 sin C UT1-UTC = -0.1659 + 0.00010 (MJD - 59229) - (UT2-UT1) where A = 2*pi*(MJD-59221)/365.25 and C = 2*pi*(MJD-59221)/435. TAI-UTC(MJD 59222) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59221)**0.80 S t = 0.00025 (MJD-59221)**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) 2021 1 8 59222 0.0587 0.3112 -0.17513 2021 1 9 59223 0.0579 0.3121 -0.17521 2021 1 10 59224 0.0571 0.3133 -0.17504 2021 1 11 59225 0.0562 0.3146 -0.17465 2021 1 12 59226 0.0550 0.3158 -0.17412 2021 1 13 59227 0.0539 0.3170 -0.17356 2021 1 14 59228 0.0528 0.3182 -0.17305 2021 1 15 59229 0.0518 0.3193 -0.17265 2021 1 16 59230 0.0508 0.3203 -0.17238 2021 1 17 59231 0.0498 0.3213 -0.17224 2021 1 18 59232 0.0490 0.3224 -0.17216 2021 1 19 59233 0.0481 0.3236 -0.17213 2021 1 20 59234 0.0473 0.3248 -0.17210 2021 1 21 59235 0.0465 0.3260 -0.17200 2021 1 22 59236 0.0458 0.3271 -0.17181 2021 1 23 59237 0.0451 0.3283 -0.17151 2021 1 24 59238 0.0444 0.3295 -0.17109 2021 1 25 59239 0.0438 0.3307 -0.17057 2021 1 26 59240 0.0431 0.3319 -0.16997 2021 1 27 59241 0.0425 0.3333 -0.16937 2021 1 28 59242 0.0419 0.3346 -0.16882 2021 1 29 59243 0.0413 0.3359 -0.16841 2021 1 30 59244 0.0407 0.3372 -0.16820 2021 1 31 59245 0.0401 0.3384 -0.16823 2021 2 1 59246 0.0396 0.3397 -0.16849 2021 2 2 59247 0.0391 0.3410 -0.16891 2021 2 3 59248 0.0387 0.3424 -0.16941 2021 2 4 59249 0.0382 0.3437 -0.16986 2021 2 5 59250 0.0378 0.3451 -0.17018 2021 2 6 59251 0.0375 0.3465 -0.17030 2021 2 7 59252 0.0371 0.3479 -0.17021 2021 2 8 59253 0.0368 0.3493 -0.16996 2021 2 9 59254 0.0364 0.3507 -0.16962 2021 2 10 59255 0.0362 0.3521 -0.16931 2021 2 11 59256 0.0359 0.3535 -0.16910 2021 2 12 59257 0.0357 0.3549 -0.16903 2021 2 13 59258 0.0355 0.3563 -0.16911 2021 2 14 59259 0.0353 0.3578 -0.16932 2021 2 15 59260 0.0351 0.3592 -0.16960 2021 2 16 59261 0.0350 0.3607 -0.16991 2021 2 17 59262 0.0349 0.3621 -0.17018 2021 2 18 59263 0.0349 0.3636 -0.17038 2021 2 19 59264 0.0348 0.3650 -0.17046 2021 2 20 59265 0.0348 0.3665 -0.17040 2021 2 21 59266 0.0349 0.3679 -0.17024 2021 2 22 59267 0.0349 0.3694 -0.16997 2021 2 23 59268 0.0350 0.3709 -0.16966 2021 2 24 59269 0.0351 0.3724 -0.16938 2021 2 25 59270 0.0352 0.3738 -0.16921 2021 2 26 59271 0.0354 0.3753 -0.16924 2021 2 27 59272 0.0356 0.3768 -0.16955 2021 2 28 59273 0.0358 0.3782 -0.17012 2021 3 1 59274 0.0360 0.3797 -0.17091 2021 3 2 59275 0.0363 0.3812 -0.17179 2021 3 3 59276 0.0366 0.3826 -0.17264 2021 3 4 59277 0.0369 0.3841 -0.17332 2021 3 5 59278 0.0373 0.3856 -0.17377 2021 3 6 59279 0.0377 0.3870 -0.17397 2021 3 7 59280 0.0381 0.3885 -0.17397 2021 3 8 59281 0.0385 0.3899 -0.17386 2021 3 9 59282 0.0390 0.3914 -0.17372 2021 3 10 59283 0.0395 0.3928 -0.17365 2021 3 11 59284 0.0401 0.3943 -0.17370 2021 3 12 59285 0.0406 0.3957 -0.17391 2021 3 13 59286 0.0412 0.3971 -0.17426 2021 3 14 59287 0.0418 0.3985 -0.17472 2021 3 15 59288 0.0424 0.3999 -0.17522 2021 3 16 59289 0.0431 0.4013 -0.17570 2021 3 17 59290 0.0438 0.4027 -0.17610 2021 3 18 59291 0.0445 0.4041 -0.17639 2021 3 19 59292 0.0453 0.4055 -0.17654 2021 3 20 59293 0.0461 0.4069 -0.17655 2021 3 21 59294 0.0469 0.4082 -0.17644 2021 3 22 59295 0.0477 0.4096 -0.17625 2021 3 23 59296 0.0485 0.4109 -0.17605 2021 3 24 59297 0.0494 0.4122 -0.17590 2021 3 25 59298 0.0503 0.4135 -0.17591 2021 3 26 59299 0.0513 0.4148 -0.17614 2021 3 27 59300 0.0522 0.4161 -0.17665 2021 3 28 59301 0.0532 0.4174 -0.17743 2021 3 29 59302 0.0542 0.4187 -0.17838 2021 3 30 59303 0.0553 0.4199 -0.17937 2021 3 31 59304 0.0563 0.4212 -0.18023 2021 4 1 59305 0.0574 0.4224 -0.18087 2021 4 2 59306 0.0585 0.4236 -0.18123 2021 4 3 59307 0.0596 0.4248 -0.18135 2021 4 4 59308 0.0608 0.4260 -0.18132 2021 4 5 59309 0.0620 0.4271 -0.18124 2021 4 6 59310 0.0632 0.4283 -0.18122 2021 4 7 59311 0.0644 0.4294 -0.18132 2021 4 8 59312 0.0656 0.4305 -0.18156 2021 4 9 59313 0.0669 0.4316 -0.18194 2021 4 10 59314 0.0682 0.4327 -0.18242 2021 4 11 59315 0.0695 0.4338 -0.18296 2021 4 12 59316 0.0708 0.4348 -0.18349 2021 4 13 59317 0.0722 0.4358 -0.18394 2021 4 14 59318 0.0735 0.4368 -0.18428 2021 4 15 59319 0.0749 0.4378 -0.18447 2021 4 16 59320 0.0763 0.4388 -0.18450 2021 4 17 59321 0.0778 0.4397 -0.18439 2021 4 18 59322 0.0792 0.4406 -0.18417 2021 4 19 59323 0.0807 0.4415 -0.18389 2021 4 20 59324 0.0821 0.4424 -0.18364 2021 4 21 59325 0.0836 0.4433 -0.18349 2021 4 22 59326 0.0852 0.4441 -0.18352 2021 4 23 59327 0.0867 0.4450 -0.18381 2021 4 24 59328 0.0882 0.4457 -0.18436 2021 4 25 59329 0.0898 0.4465 -0.18514 2021 4 26 59330 0.0914 0.4473 -0.18603 2021 4 27 59331 0.0930 0.4480 -0.18686 2021 4 28 59332 0.0946 0.4487 -0.18751 2021 4 29 59333 0.0962 0.4494 -0.18787 2021 4 30 59334 0.0979 0.4500 -0.18794 2021 5 1 59335 0.0995 0.4507 -0.18779 2021 5 2 59336 0.1012 0.4513 -0.18753 2021 5 3 59337 0.1029 0.4519 -0.18727 2021 5 4 59338 0.1045 0.4524 -0.18709 2021 5 5 59339 0.1062 0.4530 -0.18703 2021 5 6 59340 0.1080 0.4535 -0.18710 2021 5 7 59341 0.1097 0.4540 -0.18725 2021 5 8 59342 0.1114 0.4544 -0.18745 2021 5 9 59343 0.1132 0.4549 -0.18764 2021 5 10 59344 0.1149 0.4553 -0.18777 2021 5 11 59345 0.1167 0.4557 -0.18779 2021 5 12 59346 0.1184 0.4560 -0.18765 2021 5 13 59347 0.1202 0.4563 -0.18734 2021 5 14 59348 0.1220 0.4566 -0.18687 2021 5 15 59349 0.1238 0.4569 -0.18627 2021 5 16 59350 0.1256 0.4572 -0.18560 2021 5 17 59351 0.1274 0.4574 -0.18491 2021 5 18 59352 0.1292 0.4576 -0.18429 2021 5 19 59353 0.1310 0.4578 -0.18381 2021 5 20 59354 0.1328 0.4579 -0.18353 2021 5 21 59355 0.1346 0.4580 -0.18349 2021 5 22 59356 0.1364 0.4581 -0.18368 2021 5 23 59357 0.1382 0.4582 -0.18403 2021 5 24 59358 0.1401 0.4582 -0.18442 2021 5 25 59359 0.1419 0.4582 -0.18469 2021 5 26 59360 0.1437 0.4582 -0.18472 2021 5 27 59361 0.1456 0.4581 -0.18447 2021 5 28 59362 0.1474 0.4580 -0.18395 2021 5 29 59363 0.1492 0.4579 -0.18328 2021 5 30 59364 0.1510 0.4578 -0.18256 2021 5 31 59365 0.1529 0.4576 -0.18191 2021 6 1 59366 0.1547 0.4575 -0.18138 2021 6 2 59367 0.1565 0.4572 -0.18096 2021 6 3 59368 0.1583 0.4570 -0.18065 2021 6 4 59369 0.1601 0.4567 -0.18038 2021 6 5 59370 0.1619 0.4564 -0.18011 2021 6 6 59371 0.1637 0.4561 -0.17979 2021 6 7 59372 0.1655 0.4557 -0.17935 2021 6 8 59373 0.1673 0.4553 -0.17877 2021 6 9 59374 0.1691 0.4549 -0.17803 2021 6 10 59375 0.1709 0.4545 -0.17712 2021 6 11 59376 0.1726 0.4540 -0.17607 2021 6 12 59377 0.1744 0.4535 -0.17492 2021 6 13 59378 0.1762 0.4530 -0.17375 2021 6 14 59379 0.1779 0.4525 -0.17263 2021 6 15 59380 0.1796 0.4519 -0.17163 2021 6 16 59381 0.1814 0.4513 -0.17080 2021 6 17 59382 0.1831 0.4507 -0.17019 2021 6 18 59383 0.1848 0.4500 -0.16979 2021 6 19 59384 0.1865 0.4493 -0.16956 2021 6 20 59385 0.1882 0.4486 -0.16941 2021 6 21 59386 0.1898 0.4479 -0.16921 2021 6 22 59387 0.1915 0.4471 -0.16884 2021 6 23 59388 0.1931 0.4464 -0.16822 2021 6 24 59389 0.1947 0.4455 -0.16734 2021 6 25 59390 0.1964 0.4447 -0.16627 2021 6 26 59391 0.1980 0.4438 -0.16513 2021 6 27 59392 0.1995 0.4430 -0.16402 2021 6 28 59393 0.2011 0.4420 -0.16302 2021 6 29 59394 0.2027 0.4411 -0.16217 2021 6 30 59395 0.2042 0.4401 -0.16143 2021 7 1 59396 0.2057 0.4392 -0.16076 2021 7 2 59397 0.2072 0.4382 -0.16009 2021 7 3 59398 0.2087 0.4371 -0.15937 2021 7 4 59399 0.2101 0.4361 -0.15853 2021 7 5 59400 0.2116 0.4350 -0.15754 2021 7 6 59401 0.2130 0.4339 -0.15637 2021 7 7 59402 0.2144 0.4328 -0.15502 2021 7 8 59403 0.2158 0.4316 -0.15350 2021 7 9 59404 0.2172 0.4304 -0.15185 2021 7 10 59405 0.2185 0.4293 -0.15012 2021 7 11 59406 0.2198 0.4280 -0.14840 2021 7 12 59407 0.2211 0.4268 -0.14674 2021 7 13 59408 0.2224 0.4256 -0.14522 2021 7 14 59409 0.2237 0.4243 -0.14388 2021 7 15 59410 0.2249 0.4230 -0.14273 2021 7 16 59411 0.2261 0.4217 -0.14176 2021 7 17 59412 0.2273 0.4203 -0.14091 2021 7 18 59413 0.2284 0.4190 -0.14010 2021 7 19 59414 0.2296 0.4176 -0.13924 2021 7 20 59415 0.2307 0.4162 -0.13825 2021 7 21 59416 0.2318 0.4148 -0.13709 2021 7 22 59417 0.2328 0.4134 -0.13578 2021 7 23 59418 0.2338 0.4119 -0.13439 2021 7 24 59419 0.2348 0.4105 -0.13302 2021 7 25 59420 0.2358 0.4090 -0.13176 2021 7 26 59421 0.2368 0.4075 -0.13064 2021 7 27 59422 0.2377 0.4060 -0.12968 2021 7 28 59423 0.2386 0.4045 -0.12882 2021 7 29 59424 0.2395 0.4029 -0.12803 2021 7 30 59425 0.2403 0.4014 -0.12723 2021 7 31 59426 0.2411 0.3998 -0.12638 2021 8 1 59427 0.2419 0.3982 -0.12543 2021 8 2 59428 0.2427 0.3966 -0.12437 2021 8 3 59429 0.2434 0.3950 -0.12318 2021 8 4 59430 0.2441 0.3934 -0.12188 2021 8 5 59431 0.2447 0.3918 -0.12049 2021 8 6 59432 0.2454 0.3901 -0.11907 2021 8 7 59433 0.2460 0.3885 -0.11768 2021 8 8 59434 0.2466 0.3868 -0.11640 2021 8 9 59435 0.2471 0.3852 -0.11529 2021 8 10 59436 0.2476 0.3835 -0.11440 2021 8 11 59437 0.2481 0.3818 -0.11377 2021 8 12 59438 0.2486 0.3801 -0.11335 2021 8 13 59439 0.2490 0.3784 -0.11307 2021 8 14 59440 0.2494 0.3766 -0.11283 2021 8 15 59441 0.2497 0.3749 -0.11252 2021 8 16 59442 0.2501 0.3732 -0.11203 2021 8 17 59443 0.2504 0.3714 -0.11133 2021 8 18 59444 0.2506 0.3697 -0.11041 2021 8 19 59445 0.2509 0.3679 -0.10931 2021 8 20 59446 0.2511 0.3662 -0.10817 2021 8 21 59447 0.2512 0.3644 -0.10722 2021 8 22 59448 0.2514 0.3627 -0.10657 2021 8 23 59449 0.2515 0.3609 -0.10617 2021 8 24 59450 0.2515 0.3591 -0.10604 2021 8 25 59451 0.2516 0.3574 -0.10604 2021 8 26 59452 0.2516 0.3556 -0.10607 2021 8 27 59453 0.2516 0.3538 -0.10606 2021 8 28 59454 0.2515 0.3520 -0.10591 2021 8 29 59455 0.2514 0.3502 -0.10564 2021 8 30 59456 0.2513 0.3485 -0.10526 2021 8 31 59457 0.2511 0.3467 -0.10477 2021 9 1 59458 0.2509 0.3449 -0.10417 2021 9 2 59459 0.2507 0.3431 -0.10353 2021 9 3 59460 0.2505 0.3414 -0.10290 2021 9 4 59461 0.2502 0.3396 -0.10241 2021 9 5 59462 0.2499 0.3378 -0.10213 2021 9 6 59463 0.2495 0.3361 -0.10215 2021 9 7 59464 0.2491 0.3343 -0.10241 2021 9 8 59465 0.2487 0.3325 -0.10288 2021 9 9 59466 0.2483 0.3308 -0.10354 2021 9 10 59467 0.2478 0.3290 -0.10427 2021 9 11 59468 0.2473 0.3273 -0.10493 2021 9 12 59469 0.2467 0.3256 -0.10542 2021 9 13 59470 0.2461 0.3238 -0.10567 2021 9 14 59471 0.2455 0.3221 -0.10575 2021 9 15 59472 0.2449 0.3204 -0.10563 2021 9 16 59473 0.2442 0.3187 -0.10543 2021 9 17 59474 0.2435 0.3170 -0.10531 2021 9 18 59475 0.2428 0.3153 -0.10533 2021 9 19 59476 0.2420 0.3137 -0.10562 2021 9 20 59477 0.2412 0.3120 -0.10613 2021 9 21 59478 0.2404 0.3103 -0.10673 2021 9 22 59479 0.2396 0.3087 -0.10739 2021 9 23 59480 0.2387 0.3071 -0.10804 2021 9 24 59481 0.2378 0.3055 -0.10850 2021 9 25 59482 0.2368 0.3039 -0.10881 2021 9 26 59483 0.2358 0.3023 -0.10894 2021 9 27 59484 0.2348 0.3007 -0.10884 2021 9 28 59485 0.2338 0.2991 -0.10863 2021 9 29 59486 0.2327 0.2976 -0.10837 2021 9 30 59487 0.2317 0.2960 -0.10811 2021 10 1 59488 0.2305 0.2945 -0.10789 2021 10 2 59489 0.2294 0.2930 -0.10778 2021 10 3 59490 0.2282 0.2915 -0.10788 2021 10 4 59491 0.2270 0.2901 -0.10824 2021 10 5 59492 0.2258 0.2886 -0.10885 2021 10 6 59493 0.2246 0.2872 -0.10960 2021 10 7 59494 0.2233 0.2858 -0.11040 2021 10 8 59495 0.2220 0.2844 -0.11113 2021 10 9 59496 0.2206 0.2830 -0.11168 2021 10 10 59497 0.2193 0.2816 -0.11196 2021 10 11 59498 0.2179 0.2803 -0.11197 2021 10 12 59499 0.2165 0.2790 -0.11181 2021 10 13 59500 0.2151 0.2777 -0.11164 2021 10 14 59501 0.2136 0.2764 -0.11155 2021 10 15 59502 0.2121 0.2751 -0.11159 2021 10 16 59503 0.2107 0.2739 -0.11177 2021 10 17 59504 0.2091 0.2727 -0.11215 2021 10 18 59505 0.2076 0.2715 -0.11276 2021 10 19 59506 0.2060 0.2703 -0.11355 2021 10 20 59507 0.2044 0.2692 -0.11442 2021 10 21 59508 0.2028 0.2681 -0.11525 2021 10 22 59509 0.2012 0.2670 -0.11598 2021 10 23 59510 0.1996 0.2659 -0.11656 2021 10 24 59511 0.1979 0.2648 -0.11695 2021 10 25 59512 0.1962 0.2638 -0.11716 2021 10 26 59513 0.1945 0.2628 -0.11724 2021 10 27 59514 0.1928 0.2618 -0.11723 2021 10 28 59515 0.1910 0.2609 -0.11721 2021 10 29 59516 0.1893 0.2600 -0.11725 2021 10 30 59517 0.1875 0.2591 -0.11740 2021 10 31 59518 0.1857 0.2582 -0.11776 2021 11 1 59519 0.1839 0.2574 -0.11832 2021 11 2 59520 0.1821 0.2565 -0.11906 2021 11 3 59521 0.1803 0.2558 -0.11991 2021 11 4 59522 0.1784 0.2550 -0.12079 2021 11 5 59523 0.1765 0.2543 -0.12151 2021 11 6 59524 0.1747 0.2536 -0.12197 2021 11 7 59525 0.1728 0.2529 -0.12217 2021 11 8 59526 0.1709 0.2522 -0.12214 2021 11 9 59527 0.1690 0.2516 -0.12203 2021 11 10 59528 0.1670 0.2510 -0.12188 2021 11 11 59529 0.1651 0.2505 -0.12187 2021 11 12 59530 0.1632 0.2499 -0.12212 2021 11 13 59531 0.1612 0.2494 -0.12257 2021 11 14 59532 0.1592 0.2490 -0.12320 2021 11 15 59533 0.1573 0.2485 -0.12397 2021 11 16 59534 0.1553 0.2481 -0.12476 2021 11 17 59535 0.1533 0.2477 -0.12548 2021 11 18 59536 0.1513 0.2474 -0.12611 2021 11 19 59537 0.1493 0.2470 -0.12659 2021 11 20 59538 0.1473 0.2468 -0.12688 2021 11 21 59539 0.1453 0.2465 -0.12707 2021 11 22 59540 0.1433 0.2463 -0.12716 2021 11 23 59541 0.1412 0.2461 -0.12715 2021 11 24 59542 0.1392 0.2459 -0.12712 2021 11 25 59543 0.1372 0.2458 -0.12721 2021 11 26 59544 0.1352 0.2456 -0.12748 2021 11 27 59545 0.1331 0.2456 -0.12791 2021 11 28 59546 0.1311 0.2455 -0.12854 2021 11 29 59547 0.1291 0.2455 -0.12939 2021 11 30 59548 0.1270 0.2455 -0.13039 2021 12 1 59549 0.1250 0.2456 -0.13147 2021 12 2 59550 0.1230 0.2457 -0.13251 2021 12 3 59551 0.1209 0.2458 -0.13334 2021 12 4 59552 0.1189 0.2459 -0.13390 2021 12 5 59553 0.1169 0.2461 -0.13420 2021 12 6 59554 0.1149 0.2463 -0.13433 2021 12 7 59555 0.1128 0.2465 -0.13444 2021 12 8 59556 0.1108 0.2468 -0.13466 2021 12 9 59557 0.1088 0.2471 -0.13502 2021 12 10 59558 0.1068 0.2474 -0.13546 2021 12 11 59559 0.1048 0.2478 -0.13591 2021 12 12 59560 0.1028 0.2482 -0.13641 2021 12 13 59561 0.1008 0.2486 -0.13688 2021 12 14 59562 0.0989 0.2491 -0.13725 2021 12 15 59563 0.0969 0.2495 -0.13749 2021 12 16 59564 0.0949 0.2501 -0.13758 2021 12 17 59565 0.0930 0.2506 -0.13745 2021 12 18 59566 0.0911 0.2512 -0.13721 2021 12 19 59567 0.0891 0.2518 -0.13689 2021 12 20 59568 0.0872 0.2524 -0.13654 2021 12 21 59569 0.0853 0.2531 -0.13617 2021 12 22 59570 0.0834 0.2538 -0.13583 2021 12 23 59571 0.0815 0.2545 -0.13557 2021 12 24 59572 0.0797 0.2553 -0.13548 2021 12 25 59573 0.0778 0.2560 -0.13566 2021 12 26 59574 0.0760 0.2569 -0.13609 2021 12 27 59575 0.0742 0.2577 -0.13670 2021 12 28 59576 0.0724 0.2586 -0.13746 2021 12 29 59577 0.0706 0.2595 -0.13829 2021 12 30 59578 0.0688 0.2604 -0.13901 2021 12 31 59579 0.0670 0.2614 -0.13960 2022 1 1 59580 0.0653 0.2623 -0.14000 2022 1 2 59581 0.0636 0.2633 -0.14030 2022 1 3 59582 0.0619 0.2644 -0.14055 2022 1 4 59583 0.0602 0.2654 -0.14083 2022 1 5 59584 0.0585 0.2665 -0.14128 2022 1 6 59585 0.0569 0.2677 -0.14192 2022 1 7 59586 0.0553 0.2688 -0.14271 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) 59199 -110.95 0.12 -5.97 0.06 59200 -110.68 0.12 -6.01 0.06 59201 -110.42 0.12 -6.21 0.06 IERS Celestial Pole Offset Final Series MJD dpsi deps (msec. of arc) 59155 -113.4 -7.6 59156 -113.4 -7.7 59157 -113.4 -7.8 59158 -113.5 -7.9 59159 -113.7 -8.0 59160 -113.4 -7.9 59161 -112.8 -7.7 59162 -112.2 -7.5 59163 -111.8 -7.3 59164 -111.8 -7.1 59165 -112.1 -7.0 59166 -112.5 -6.9 59167 -112.9 -6.9 59168 -113.0 -7.2 59169 -112.8 -7.2 59170 -112.6 -7.0 59171 -112.3 -6.8 59172 -112.1 -6.9 59173 -111.9 -7.1 59174 -111.8 -7.2 59175 -111.7 -7.0 59176 -111.7 -6.7 59177 -111.5 -6.6 59178 -111.4 -6.5 59179 -111.6 -6.4 59180 -112.0 -6.1 59181 -112.0 -6.0 59182 -111.9 -6.0 59183 -111.8 -6.1 59184 -111.7 -6.3 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 59199 -0.005 0.046 -0.074 0.063 59200 -0.023 0.046 -0.063 0.063 59201 -0.039 0.046 -0.053 0.063 IAU2000A Celestial Pole Offset Final Series MJD dX dY (msec. of arc) 59155 0.17 0.11 59156 0.16 0.10 59157 0.14 0.09 59158 0.10 0.10 59159 0.05 0.12 59160 0.09 0.10 59161 0.15 0.07 59162 0.22 0.04 59163 0.28 0.01 59164 0.27 -0.03 59165 0.24 -0.08 59166 0.19 -0.06 59167 0.14 -0.03 59168 0.09 0.00 59169 0.03 0.03 59170 -0.02 0.05 59171 0.01 0.06 59172 0.05 0.06 59173 0.10 0.06 59174 0.14 0.06 59175 0.17 0.06 59176 0.19 0.06 59177 0.22 0.06 59178 0.25 0.06 59179 0.15 0.09 59180 0.02 0.11 59181 -0.00 0.13 59182 0.01 0.14 59183 0.03 0.16 59184 0.05 0.17 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).