********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 29 October 2020 Vol. XXXIII No. 044 ______________________________________________________________________ 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 10 23 59145 0.17211 .00009 0.30320 .00009 -0.173119 0.000015 20 10 24 59146 0.17092 .00009 0.30240 .00009 -0.173196 0.000013 20 10 25 59147 0.16958 .00009 0.30152 .00009 -0.173325 0.000013 20 10 26 59148 0.16826 .00009 0.30062 .00009 -0.173506 0.000021 20 10 27 59149 0.16693 .00009 0.29988 .00009 -0.173769 0.000023 20 10 28 59150 0.16534 .00009 0.29920 .00009 -0.174120 0.000026 20 10 29 59151 0.16365 .00009 0.29850 .00009 -0.174515 0.000029 _______________________________________________________________________ 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 = 0.1201 + 0.0353 cos A - 0.0765 sin A + 0.0112 cos C + 0.0064 sin C y = 0.3596 - 0.0714 cos A - 0.0331 sin A + 0.0064 cos C - 0.0112 sin C UT1-UTC = -0.1760 - 0.00002 (MJD - 59159) - (UT2-UT1) where A = 2*pi*(MJD-59151)/365.25 and C = 2*pi*(MJD-59151)/435. TAI-UTC(MJD 59152) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59151)**0.80 S t = 0.00025 (MJD-59151)**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 10 30 59152 0.1621 0.2978 -0.17490 2020 10 31 59153 0.1606 0.2971 -0.17524 2020 11 1 59154 0.1592 0.2965 -0.17551 2020 11 2 59155 0.1578 0.2959 -0.17568 2020 11 3 59156 0.1565 0.2952 -0.17572 2020 11 4 59157 0.1551 0.2947 -0.17560 2020 11 5 59158 0.1538 0.2942 -0.17535 2020 11 6 59159 0.1524 0.2937 -0.17503 2020 11 7 59160 0.1510 0.2932 -0.17474 2020 11 8 59161 0.1496 0.2927 -0.17459 2020 11 9 59162 0.1483 0.2923 -0.17463 2020 11 10 59163 0.1469 0.2919 -0.17492 2020 11 11 59164 0.1455 0.2914 -0.17548 2020 11 12 59165 0.1441 0.2911 -0.17629 2020 11 13 59166 0.1427 0.2907 -0.17724 2020 11 14 59167 0.1413 0.2904 -0.17820 2020 11 15 59168 0.1399 0.2900 -0.17897 2020 11 16 59169 0.1385 0.2898 -0.17945 2020 11 17 59170 0.1371 0.2895 -0.17963 2020 11 18 59171 0.1356 0.2893 -0.17956 2020 11 19 59172 0.1342 0.2890 -0.17935 2020 11 20 59173 0.1328 0.2889 -0.17909 2020 11 21 59174 0.1313 0.2887 -0.17888 2020 11 22 59175 0.1299 0.2885 -0.17875 2020 11 23 59176 0.1285 0.2884 -0.17872 2020 11 24 59177 0.1270 0.2883 -0.17876 2020 11 25 59178 0.1256 0.2883 -0.17884 2020 11 26 59179 0.1241 0.2882 -0.17892 2020 11 27 59180 0.1226 0.2882 -0.17898 2020 11 28 59181 0.1212 0.2882 -0.17898 2020 11 29 59182 0.1197 0.2882 -0.17887 2020 11 30 59183 0.1182 0.2883 -0.17863 2020 12 1 59184 0.1168 0.2884 -0.17825 2020 12 2 59185 0.1153 0.2885 -0.17775 2020 12 3 59186 0.1139 0.2886 -0.17719 2020 12 4 59187 0.1124 0.2888 -0.17662 2020 12 5 59188 0.1109 0.2889 -0.17613 2020 12 6 59189 0.1095 0.2891 -0.17578 2020 12 7 59190 0.1080 0.2894 -0.17562 2020 12 8 59191 0.1066 0.2896 -0.17568 2020 12 9 59192 0.1051 0.2899 -0.17595 2020 12 10 59193 0.1036 0.2902 -0.17635 2020 12 11 59194 0.1022 0.2905 -0.17678 2020 12 12 59195 0.1008 0.2908 -0.17710 2020 12 13 59196 0.0993 0.2912 -0.17721 2020 12 14 59197 0.0979 0.2916 -0.17708 2020 12 15 59198 0.0965 0.2920 -0.17672 2020 12 16 59199 0.0950 0.2925 -0.17622 2020 12 17 59200 0.0936 0.2929 -0.17568 2020 12 18 59201 0.0922 0.2934 -0.17520 2020 12 19 59202 0.0908 0.2939 -0.17484 2020 12 20 59203 0.0894 0.2944 -0.17461 2020 12 21 59204 0.0881 0.2950 -0.17451 2020 12 22 59205 0.0867 0.2956 -0.17450 2020 12 23 59206 0.0853 0.2962 -0.17453 2020 12 24 59207 0.0840 0.2968 -0.17456 2020 12 25 59208 0.0826 0.2975 -0.17453 2020 12 26 59209 0.0813 0.2981 -0.17440 2020 12 27 59210 0.0800 0.2988 -0.17414 2020 12 28 59211 0.0787 0.2995 -0.17374 2020 12 29 59212 0.0774 0.3003 -0.17322 2020 12 30 59213 0.0761 0.3010 -0.17261 2020 12 31 59214 0.0749 0.3018 -0.17199 2021 1 1 59215 0.0736 0.3026 -0.17142 2021 1 2 59216 0.0724 0.3034 -0.17098 2021 1 3 59217 0.0711 0.3043 -0.17074 2021 1 4 59218 0.0699 0.3051 -0.17071 2021 1 5 59219 0.0687 0.3060 -0.17089 2021 1 6 59220 0.0676 0.3069 -0.17121 2021 1 7 59221 0.0664 0.3079 -0.17158 2021 1 8 59222 0.0652 0.3088 -0.17188 2021 1 9 59223 0.0641 0.3098 -0.17203 2021 1 10 59224 0.0630 0.3107 -0.17196 2021 1 11 59225 0.0619 0.3117 -0.17168 2021 1 12 59226 0.0608 0.3128 -0.17124 2021 1 13 59227 0.0598 0.3138 -0.17074 2021 1 14 59228 0.0587 0.3149 -0.17028 2021 1 15 59229 0.0577 0.3159 -0.16992 2021 1 16 59230 0.0567 0.3170 -0.16971 2021 1 17 59231 0.0557 0.3181 -0.16963 2021 1 18 59232 0.0548 0.3193 -0.16965 2021 1 19 59233 0.0539 0.3204 -0.16973 2021 1 20 59234 0.0529 0.3216 -0.16981 2021 1 21 59235 0.0520 0.3227 -0.16984 2021 1 22 59236 0.0512 0.3239 -0.16979 2021 1 23 59237 0.0503 0.3251 -0.16963 2021 1 24 59238 0.0495 0.3263 -0.16935 2021 1 25 59239 0.0487 0.3276 -0.16896 2021 1 26 59240 0.0479 0.3288 -0.16849 2021 1 27 59241 0.0471 0.3301 -0.16801 2021 1 28 59242 0.0464 0.3314 -0.16758 2021 1 29 59243 0.0457 0.3326 -0.16730 2021 1 30 59244 0.0450 0.3339 -0.16723 2021 1 31 59245 0.0443 0.3353 -0.16742 2021 2 1 59246 0.0437 0.3366 -0.16785 2021 2 2 59247 0.0431 0.3379 -0.16845 2021 2 3 59248 0.0425 0.3393 -0.16912 2021 2 4 59249 0.0419 0.3406 -0.16974 2021 2 5 59250 0.0414 0.3420 -0.17022 2021 2 6 59251 0.0409 0.3434 -0.17050 2021 2 7 59252 0.0404 0.3448 -0.17057 2021 2 8 59253 0.0399 0.3462 -0.17048 2021 2 9 59254 0.0395 0.3476 -0.17032 2021 2 10 59255 0.0391 0.3490 -0.17017 2021 2 11 59256 0.0387 0.3504 -0.17013 2021 2 12 59257 0.0384 0.3518 -0.17023 2021 2 13 59258 0.0380 0.3533 -0.17049 2021 2 14 59259 0.0377 0.3547 -0.17087 2021 2 15 59260 0.0375 0.3561 -0.17124 2021 2 16 59261 0.0372 0.3576 -0.17164 2021 2 17 59262 0.0370 0.3591 -0.17200 2021 2 18 59263 0.0368 0.3605 -0.17228 2021 2 19 59264 0.0367 0.3620 -0.17244 2021 2 20 59265 0.0365 0.3635 -0.17247 2021 2 21 59266 0.0364 0.3649 -0.17239 2021 2 22 59267 0.0363 0.3664 -0.17221 2021 2 23 59268 0.0363 0.3679 -0.17199 2021 2 24 59269 0.0363 0.3694 -0.17179 2021 2 25 59270 0.0363 0.3709 -0.17171 2021 2 26 59271 0.0363 0.3724 -0.17182 2021 2 27 59272 0.0364 0.3738 -0.17220 2021 2 28 59273 0.0365 0.3753 -0.17285 2021 3 1 59274 0.0366 0.3768 -0.17371 2021 3 2 59275 0.0368 0.3783 -0.17468 2021 3 3 59276 0.0370 0.3798 -0.17562 2021 3 4 59277 0.0372 0.3813 -0.17640 2021 3 5 59278 0.0374 0.3828 -0.17697 2021 3 6 59279 0.0377 0.3842 -0.17729 2021 3 7 59280 0.0380 0.3857 -0.17742 2021 3 8 59281 0.0383 0.3872 -0.17745 2021 3 9 59282 0.0386 0.3887 -0.17746 2021 3 10 59283 0.0390 0.3901 -0.17756 2021 3 11 59284 0.0394 0.3916 -0.17779 2021 3 12 59285 0.0399 0.3931 -0.17817 2021 3 13 59286 0.0403 0.3945 -0.17870 2021 3 14 59287 0.0408 0.3960 -0.17934 2021 3 15 59288 0.0414 0.3974 -0.18001 2021 3 16 59289 0.0419 0.3988 -0.18067 2021 3 17 59290 0.0425 0.4002 -0.18126 2021 3 18 59291 0.0431 0.4017 -0.18174 2021 3 19 59292 0.0437 0.4031 -0.18207 2021 3 20 59293 0.0444 0.4045 -0.18227 2021 3 21 59294 0.0451 0.4059 -0.18236 2021 3 22 59295 0.0458 0.4072 -0.18238 2021 3 23 59296 0.0465 0.4086 -0.18239 2021 3 24 59297 0.0473 0.4100 -0.18247 2021 3 25 59298 0.0481 0.4113 -0.18272 2021 3 26 59299 0.0489 0.4127 -0.18320 2021 3 27 59300 0.0498 0.4140 -0.18397 2021 3 28 59301 0.0506 0.4153 -0.18500 2021 3 29 59302 0.0515 0.4166 -0.18621 2021 3 30 59303 0.0525 0.4179 -0.18745 2021 3 31 59304 0.0534 0.4192 -0.18858 2021 4 1 59305 0.0544 0.4204 -0.18947 2021 4 2 59306 0.0554 0.4217 -0.19009 2021 4 3 59307 0.0564 0.4229 -0.19047 2021 4 4 59308 0.0575 0.4241 -0.19069 2021 4 5 59309 0.0586 0.4254 -0.19086 2021 4 6 59310 0.0597 0.4265 -0.19107 2021 4 7 59311 0.0608 0.4277 -0.19139 2021 4 8 59312 0.0619 0.4289 -0.19185 2021 4 9 59313 0.0631 0.4300 -0.19245 2021 4 10 59314 0.0643 0.4311 -0.19314 2021 4 11 59315 0.0655 0.4322 -0.19389 2021 4 12 59316 0.0667 0.4333 -0.19463 2021 4 13 59317 0.0680 0.4344 -0.19531 2021 4 14 59318 0.0693 0.4354 -0.19587 2021 4 15 59319 0.0706 0.4365 -0.19628 2021 4 16 59320 0.0719 0.4375 -0.19653 2021 4 17 59321 0.0733 0.4385 -0.19664 2021 4 18 59322 0.0746 0.4394 -0.19665 2021 4 19 59323 0.0760 0.4404 -0.19661 2021 4 20 59324 0.0774 0.4413 -0.19659 2021 4 21 59325 0.0788 0.4422 -0.19667 2021 4 22 59326 0.0803 0.4431 -0.19693 2021 4 23 59327 0.0817 0.4440 -0.19744 2021 4 24 59328 0.0832 0.4448 -0.19821 2021 4 25 59329 0.0847 0.4457 -0.19921 2021 4 26 59330 0.0862 0.4465 -0.20031 2021 4 27 59331 0.0877 0.4472 -0.20135 2021 4 28 59332 0.0893 0.4480 -0.20219 2021 4 29 59333 0.0908 0.4487 -0.20273 2021 4 30 59334 0.0924 0.4494 -0.20297 2021 5 1 59335 0.0940 0.4501 -0.20298 2021 5 2 59336 0.0956 0.4508 -0.20285 2021 5 3 59337 0.0972 0.4514 -0.20272 2021 5 4 59338 0.0988 0.4520 -0.20266 2021 5 5 59339 0.1005 0.4526 -0.20271 2021 5 6 59340 0.1021 0.4532 -0.20290 2021 5 7 59341 0.1038 0.4537 -0.20321 2021 5 8 59342 0.1055 0.4542 -0.20362 2021 5 9 59343 0.1072 0.4547 -0.20409 2021 5 10 59344 0.1089 0.4551 -0.20457 2021 5 11 59345 0.1106 0.4556 -0.20500 2021 5 12 59346 0.1123 0.4560 -0.20533 2021 5 13 59347 0.1140 0.4564 -0.20554 2021 5 14 59348 0.1158 0.4567 -0.20559 2021 5 15 59349 0.1175 0.4571 -0.20552 2021 5 16 59350 0.1193 0.4574 -0.20534 2021 5 17 59351 0.1210 0.4576 -0.20511 2021 5 18 59352 0.1228 0.4579 -0.20491 2021 5 19 59353 0.1246 0.4581 -0.20479 2021 5 20 59354 0.1263 0.4583 -0.20484 2021 5 21 59355 0.1281 0.4585 -0.20507 2021 5 22 59356 0.1299 0.4586 -0.20550 2021 5 23 59357 0.1317 0.4587 -0.20605 2021 5 24 59358 0.1335 0.4588 -0.20661 2021 5 25 59359 0.1353 0.4588 -0.20702 2021 5 26 59360 0.1371 0.4589 -0.20718 2021 5 27 59361 0.1389 0.4589 -0.20705 2021 5 28 59362 0.1407 0.4589 -0.20667 2021 5 29 59363 0.1425 0.4588 -0.20616 2021 5 30 59364 0.1443 0.4587 -0.20564 2021 5 31 59365 0.1461 0.4586 -0.20522 2021 6 1 59366 0.1480 0.4585 -0.20498 2021 6 2 59367 0.1498 0.4583 -0.20494 2021 6 3 59368 0.1516 0.4581 -0.20505 2021 6 4 59369 0.1534 0.4579 -0.20525 2021 6 5 59370 0.1552 0.4576 -0.20545 2021 6 6 59371 0.1570 0.4574 -0.20559 2021 6 7 59372 0.1588 0.4571 -0.20559 2021 6 8 59373 0.1606 0.4567 -0.20541 2021 6 9 59374 0.1623 0.4564 -0.20502 2021 6 10 59375 0.1641 0.4560 -0.20444 2021 6 11 59376 0.1659 0.4556 -0.20367 2021 6 12 59377 0.1677 0.4551 -0.20274 2021 6 13 59378 0.1694 0.4547 -0.20176 2021 6 14 59379 0.1712 0.4542 -0.20077 2021 6 15 59380 0.1729 0.4536 -0.19984 2021 6 16 59381 0.1747 0.4531 -0.19903 2021 6 17 59382 0.1764 0.4525 -0.19842 2021 6 18 59383 0.1781 0.4519 -0.19800 2021 6 19 59384 0.1798 0.4513 -0.19771 2021 6 20 59385 0.1815 0.4506 -0.19752 2021 6 21 59386 0.1832 0.4499 -0.19730 2021 6 22 59387 0.1849 0.4492 -0.19695 2021 6 23 59388 0.1866 0.4485 -0.19633 2021 6 24 59389 0.1882 0.4477 -0.19549 2021 6 25 59390 0.1898 0.4469 -0.19456 2021 6 26 59391 0.1915 0.4461 -0.19360 2021 6 27 59392 0.1931 0.4453 -0.19273 2021 6 28 59393 0.1947 0.4444 -0.19205 2021 6 29 59394 0.1963 0.4435 -0.19154 2021 6 30 59395 0.1978 0.4426 -0.19115 2021 7 1 59396 0.1994 0.4417 -0.19086 2021 7 2 59397 0.2009 0.4407 -0.19059 2021 7 3 59398 0.2024 0.4397 -0.19026 2021 7 4 59399 0.2039 0.4387 -0.18990 2021 7 5 59400 0.2054 0.4377 -0.18944 2021 7 6 59401 0.2069 0.4366 -0.18879 2021 7 7 59402 0.2083 0.4355 -0.18798 2021 7 8 59403 0.2098 0.4344 -0.18709 2021 7 9 59404 0.2112 0.4333 -0.18615 2021 7 10 59405 0.2126 0.4322 -0.18514 2021 7 11 59406 0.2139 0.4310 -0.18416 2021 7 12 59407 0.2153 0.4298 -0.18327 2021 7 13 59408 0.2166 0.4286 -0.18252 2021 7 14 59409 0.2179 0.4274 -0.18199 2021 7 15 59410 0.2192 0.4261 -0.18165 2021 7 16 59411 0.2205 0.4248 -0.18146 2021 7 17 59412 0.2217 0.4235 -0.18135 2021 7 18 59413 0.2229 0.4222 -0.18123 2021 7 19 59414 0.2241 0.4209 -0.18101 2021 7 20 59415 0.2253 0.4195 -0.18062 2021 7 21 59416 0.2264 0.4182 -0.18005 2021 7 22 59417 0.2276 0.4168 -0.17928 2021 7 23 59418 0.2287 0.4154 -0.17832 2021 7 24 59419 0.2297 0.4140 -0.17727 2021 7 25 59420 0.2308 0.4125 -0.17631 2021 7 26 59421 0.2318 0.4111 -0.17550 2021 7 27 59422 0.2328 0.4096 -0.17481 2021 7 28 59423 0.2337 0.4081 -0.17424 2021 7 29 59424 0.2347 0.4066 -0.17371 2021 7 30 59425 0.2356 0.4051 -0.17313 2021 7 31 59426 0.2365 0.4036 -0.17253 2021 8 1 59427 0.2373 0.4020 -0.17186 2021 8 2 59428 0.2382 0.4005 -0.17112 2021 8 3 59429 0.2390 0.3989 -0.17023 2021 8 4 59430 0.2397 0.3973 -0.16919 2021 8 5 59431 0.2405 0.3957 -0.16803 2021 8 6 59432 0.2412 0.3941 -0.16684 2021 8 7 59433 0.2419 0.3925 -0.16575 2021 8 8 59434 0.2425 0.3908 -0.16481 2021 8 9 59435 0.2432 0.3892 -0.16406 2021 8 10 59436 0.2437 0.3875 -0.16357 2021 8 11 59437 0.2443 0.3859 -0.16337 2021 8 12 59438 0.2448 0.3842 -0.16338 2021 8 13 59439 0.2454 0.3825 -0.16357 2021 8 14 59440 0.2458 0.3808 -0.16383 2021 8 15 59441 0.2463 0.3792 -0.16407 2021 8 16 59442 0.2467 0.3774 -0.16418 2021 8 17 59443 0.2471 0.3757 -0.16408 2021 8 18 59444 0.2474 0.3740 -0.16381 2021 8 19 59445 0.2477 0.3723 -0.16344 2021 8 20 59446 0.2480 0.3706 -0.16305 2021 8 21 59447 0.2483 0.3688 -0.16280 2021 8 22 59448 0.2485 0.3671 -0.16274 2021 8 23 59449 0.2487 0.3654 -0.16293 2021 8 24 59450 0.2488 0.3636 -0.16329 2021 8 25 59451 0.2490 0.3619 -0.16371 2021 8 26 59452 0.2491 0.3601 -0.16410 2021 8 27 59453 0.2491 0.3584 -0.16435 2021 8 28 59454 0.2491 0.3566 -0.16435 2021 8 29 59455 0.2491 0.3549 -0.16412 2021 8 30 59456 0.2491 0.3531 -0.16369 2021 8 31 59457 0.2490 0.3514 -0.16308 2021 9 1 59458 0.2489 0.3496 -0.16234 2021 9 2 59459 0.2488 0.3479 -0.16149 2021 9 3 59460 0.2486 0.3461 -0.16060 2021 9 4 59461 0.2484 0.3444 -0.15979 2021 9 5 59462 0.2482 0.3426 -0.15919 2021 9 6 59463 0.2479 0.3409 -0.15886 2021 9 7 59464 0.2476 0.3391 -0.15885 2021 9 8 59465 0.2473 0.3374 -0.15920 2021 9 9 59466 0.2470 0.3357 -0.15980 2021 9 10 59467 0.2466 0.3339 -0.16042 2021 9 11 59468 0.2461 0.3322 -0.16099 2021 9 12 59469 0.2457 0.3305 -0.16142 2021 9 13 59470 0.2452 0.3288 -0.16163 2021 9 14 59471 0.2447 0.3271 -0.16163 2021 9 15 59472 0.2441 0.3254 -0.16149 2021 9 16 59473 0.2435 0.3237 -0.16132 2021 9 17 59474 0.2429 0.3220 -0.16122 2021 9 18 59475 0.2423 0.3204 -0.16127 2021 9 19 59476 0.2416 0.3187 -0.16149 2021 9 20 59477 0.2409 0.3171 -0.16186 2021 9 21 59478 0.2402 0.3154 -0.16235 2021 9 22 59479 0.2394 0.3138 -0.16283 2021 9 23 59480 0.2386 0.3122 -0.16323 2021 9 24 59481 0.2378 0.3106 -0.16347 2021 9 25 59482 0.2369 0.3090 -0.16356 2021 9 26 59483 0.2360 0.3074 -0.16345 2021 9 27 59484 0.2351 0.3059 -0.16310 2021 9 28 59485 0.2341 0.3043 -0.16265 2021 9 29 59486 0.2332 0.3028 -0.16215 2021 9 30 59487 0.2322 0.3013 -0.16168 2021 10 1 59488 0.2311 0.2998 -0.16127 2021 10 2 59489 0.2301 0.2983 -0.16100 2021 10 3 59490 0.2290 0.2968 -0.16094 2021 10 4 59491 0.2278 0.2953 -0.16113 2021 10 5 59492 0.2267 0.2939 -0.16166 2021 10 6 59493 0.2255 0.2925 -0.16247 2021 10 7 59494 0.2243 0.2911 -0.16338 2021 10 8 59495 0.2231 0.2897 -0.16422 2021 10 9 59496 0.2218 0.2883 -0.16487 2021 10 10 59497 0.2206 0.2870 -0.16529 2021 10 11 59498 0.2193 0.2856 -0.16551 2021 10 12 59499 0.2179 0.2843 -0.16556 2021 10 13 59500 0.2166 0.2830 -0.16554 2021 10 14 59501 0.2152 0.2818 -0.16554 2021 10 15 59502 0.2138 0.2805 -0.16568 2021 10 16 59503 0.2124 0.2793 -0.16597 2021 10 17 59504 0.2109 0.2781 -0.16636 2021 10 18 59505 0.2094 0.2769 -0.16683 2021 10 19 59506 0.2079 0.2758 -0.16740 2021 10 20 59507 0.2064 0.2746 -0.16801 2021 10 21 59508 0.2049 0.2735 -0.16852 2021 10 22 59509 0.2033 0.2724 -0.16890 2021 10 23 59510 0.2017 0.2714 -0.16916 2021 10 24 59511 0.2001 0.2703 -0.16923 2021 10 25 59512 0.1985 0.2693 -0.16909 2021 10 26 59513 0.1969 0.2683 -0.16886 2021 10 27 59514 0.1952 0.2673 -0.16861 2021 10 28 59515 0.1935 0.2664 -0.16846 2021 10 29 59516 0.1918 0.2655 -0.16851 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) 59132 -116.45 0.27 -9.40 0.05 59133 -115.91 0.27 -9.15 0.05 59134 -115.38 0.21 -8.83 0.06 59135 -115.12 0.15 -8.57 0.07 59136 -115.08 0.15 -8.33 0.07 59137 -115.16 0.15 -8.09 0.07 59138 -115.37 0.15 -7.99 0.07 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 59132 0.097 0.109 -0.017 0.047 59133 0.094 0.109 -0.017 0.047 59134 0.088 0.083 -0.018 0.064 59135 0.080 0.061 -0.019 0.073 59136 0.072 0.061 -0.020 0.073 59137 0.070 0.061 -0.020 0.073 59138 0.070 0.061 -0.020 0.073 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).