********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 1 October 2020 Vol. XXXIII No. 040 ______________________________________________________________________ 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 9 25 59117 0.20005 .00009 0.33184 .00009 -0.176032 0.000017 20 9 26 59118 0.19865 .00009 0.33057 .00009 -0.175571 0.000018 20 9 27 59119 0.19730 .00009 0.32926 .00009 -0.175036 0.000018 20 9 28 59120 0.19612 .00009 0.32795 .00009 -0.174490 0.000016 20 9 29 59121 0.19506 .00009 0.32663 .00009 -0.174036 0.000016 20 9 30 59122 0.19419 .00009 0.32539 .00009 -0.173720 0.000011 20 10 1 59123 0.19350 .00009 0.32446 .00009 -0.173504 0.000007 _______________________________________________________________________ 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 = 0.1153 + 0.0680 cos A - 0.0420 sin A + 0.0113 cos C + 0.0021 sin C y = 0.3599 - 0.0402 cos A - 0.0634 sin A + 0.0021 cos C - 0.0113 sin C UT1-UTC = -0.1815 - 0.00005 (MJD - 59131) - (UT2-UT1) where A = 2*pi*(MJD-59123)/365.25 and C = 2*pi*(MJD-59123)/435. TAI-UTC(MJD 59124) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59123)**0.80 S t = 0.00025 (MJD-59123)**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 2 59124 0.1927 0.3236 -0.17333 2020 10 3 59125 0.1919 0.3228 -0.17318 2020 10 4 59126 0.1910 0.3219 -0.17300 2020 10 5 59127 0.1900 0.3209 -0.17277 2020 10 6 59128 0.1891 0.3199 -0.17243 2020 10 7 59129 0.1882 0.3188 -0.17197 2020 10 8 59130 0.1873 0.3178 -0.17141 2020 10 9 59131 0.1865 0.3167 -0.17077 2020 10 10 59132 0.1856 0.3157 -0.17012 2020 10 11 59133 0.1847 0.3148 -0.16955 2020 10 12 59134 0.1838 0.3138 -0.16912 2020 10 13 59135 0.1829 0.3128 -0.16891 2020 10 14 59136 0.1819 0.3119 -0.16899 2020 10 15 59137 0.1810 0.3109 -0.16935 2020 10 16 59138 0.1800 0.3100 -0.16995 2020 10 17 59139 0.1790 0.3091 -0.17066 2020 10 18 59140 0.1780 0.3082 -0.17129 2020 10 19 59141 0.1769 0.3073 -0.17171 2020 10 20 59142 0.1759 0.3064 -0.17185 2020 10 21 59143 0.1748 0.3056 -0.17176 2020 10 22 59144 0.1738 0.3047 -0.17152 2020 10 23 59145 0.1727 0.3039 -0.17124 2020 10 24 59146 0.1716 0.3031 -0.17098 2020 10 25 59147 0.1704 0.3023 -0.17081 2020 10 26 59148 0.1693 0.3016 -0.17074 2020 10 27 59149 0.1681 0.3008 -0.17077 2020 10 28 59150 0.1669 0.3001 -0.17089 2020 10 29 59151 0.1657 0.2994 -0.17105 2020 10 30 59152 0.1645 0.2987 -0.17122 2020 10 31 59153 0.1633 0.2980 -0.17135 2020 11 1 59154 0.1621 0.2974 -0.17141 2020 11 2 59155 0.1608 0.2968 -0.17137 2020 11 3 59156 0.1596 0.2962 -0.17120 2020 11 4 59157 0.1583 0.2956 -0.17091 2020 11 5 59158 0.1570 0.2950 -0.17052 2020 11 6 59159 0.1557 0.2945 -0.17011 2020 11 7 59160 0.1544 0.2939 -0.16973 2020 11 8 59161 0.1530 0.2934 -0.16948 2020 11 9 59162 0.1517 0.2930 -0.16944 2020 11 10 59163 0.1503 0.2925 -0.16967 2020 11 11 59164 0.1490 0.2921 -0.17019 2020 11 12 59165 0.1476 0.2917 -0.17096 2020 11 13 59166 0.1462 0.2913 -0.17185 2020 11 14 59167 0.1448 0.2909 -0.17273 2020 11 15 59168 0.1434 0.2905 -0.17342 2020 11 16 59169 0.1420 0.2902 -0.17385 2020 11 17 59170 0.1406 0.2899 -0.17401 2020 11 18 59171 0.1391 0.2896 -0.17395 2020 11 19 59172 0.1377 0.2894 -0.17377 2020 11 20 59173 0.1363 0.2891 -0.17358 2020 11 21 59174 0.1348 0.2889 -0.17346 2020 11 22 59175 0.1334 0.2887 -0.17343 2020 11 23 59176 0.1319 0.2886 -0.17350 2020 11 24 59177 0.1304 0.2884 -0.17367 2020 11 25 59178 0.1290 0.2883 -0.17389 2020 11 26 59179 0.1275 0.2882 -0.17413 2020 11 27 59180 0.1260 0.2881 -0.17435 2020 11 28 59181 0.1245 0.2881 -0.17448 2020 11 29 59182 0.1230 0.2881 -0.17450 2020 11 30 59183 0.1215 0.2881 -0.17439 2020 12 1 59184 0.1201 0.2881 -0.17414 2020 12 2 59185 0.1186 0.2882 -0.17377 2020 12 3 59186 0.1171 0.2882 -0.17332 2020 12 4 59187 0.1156 0.2883 -0.17287 2020 12 5 59188 0.1141 0.2885 -0.17250 2020 12 6 59189 0.1126 0.2886 -0.17228 2020 12 7 59190 0.1111 0.2888 -0.17226 2020 12 8 59191 0.1096 0.2890 -0.17248 2020 12 9 59192 0.1082 0.2892 -0.17292 2020 12 10 59193 0.1067 0.2894 -0.17351 2020 12 11 59194 0.1052 0.2897 -0.17414 2020 12 12 59195 0.1037 0.2900 -0.17468 2020 12 13 59196 0.1023 0.2903 -0.17502 2020 12 14 59197 0.1008 0.2906 -0.17512 2020 12 15 59198 0.0993 0.2910 -0.17500 2020 12 16 59199 0.0979 0.2914 -0.17474 2020 12 17 59200 0.0964 0.2918 -0.17445 2020 12 18 59201 0.0950 0.2922 -0.17423 2020 12 19 59202 0.0936 0.2927 -0.17411 2020 12 20 59203 0.0921 0.2932 -0.17413 2020 12 21 59204 0.0907 0.2937 -0.17427 2020 12 22 59205 0.0893 0.2942 -0.17449 2020 12 23 59206 0.0879 0.2947 -0.17474 2020 12 24 59207 0.0865 0.2953 -0.17498 2020 12 25 59208 0.0851 0.2959 -0.17516 2020 12 26 59209 0.0838 0.2965 -0.17525 2020 12 27 59210 0.0824 0.2972 -0.17520 2020 12 28 59211 0.0811 0.2978 -0.17502 2020 12 29 59212 0.0797 0.2985 -0.17472 2020 12 30 59213 0.0784 0.2992 -0.17434 2020 12 31 59214 0.0771 0.2999 -0.17394 2021 1 1 59215 0.0758 0.3007 -0.17359 2021 1 2 59216 0.0745 0.3015 -0.17338 2021 1 3 59217 0.0732 0.3023 -0.17337 2021 1 4 59218 0.0720 0.3031 -0.17357 2021 1 5 59219 0.0707 0.3039 -0.17398 2021 1 6 59220 0.0695 0.3048 -0.17453 2021 1 7 59221 0.0683 0.3056 -0.17514 2021 1 8 59222 0.0671 0.3065 -0.17569 2021 1 9 59223 0.0659 0.3074 -0.17608 2021 1 10 59224 0.0648 0.3084 -0.17626 2021 1 11 59225 0.0636 0.3093 -0.17622 2021 1 12 59226 0.0625 0.3103 -0.17603 2021 1 13 59227 0.0614 0.3113 -0.17578 2021 1 14 59228 0.0603 0.3123 -0.17556 2021 1 15 59229 0.0593 0.3133 -0.17544 2021 1 16 59230 0.0582 0.3144 -0.17545 2021 1 17 59231 0.0572 0.3154 -0.17560 2021 1 18 59232 0.0562 0.3165 -0.17574 2021 1 19 59233 0.0552 0.3176 -0.17593 2021 1 20 59234 0.0542 0.3187 -0.17612 2021 1 21 59235 0.0533 0.3198 -0.17627 2021 1 22 59236 0.0523 0.3210 -0.17632 2021 1 23 59237 0.0514 0.3221 -0.17626 2021 1 24 59238 0.0505 0.3233 -0.17607 2021 1 25 59239 0.0497 0.3245 -0.17576 2021 1 26 59240 0.0489 0.3257 -0.17538 2021 1 27 59241 0.0480 0.3269 -0.17497 2021 1 28 59242 0.0472 0.3282 -0.17460 2021 1 29 59243 0.0465 0.3294 -0.17438 2021 1 30 59244 0.0457 0.3307 -0.17436 2021 1 31 59245 0.0450 0.3319 -0.17460 2021 2 1 59246 0.0443 0.3332 -0.17506 2021 2 2 59247 0.0437 0.3345 -0.17569 2021 2 3 59248 0.0430 0.3358 -0.17638 2021 2 4 59249 0.0424 0.3372 -0.17702 2021 2 5 59250 0.0418 0.3385 -0.17752 2021 2 6 59251 0.0412 0.3398 -0.17781 2021 2 7 59252 0.0407 0.3412 -0.17788 2021 2 8 59253 0.0402 0.3426 -0.17780 2021 2 9 59254 0.0397 0.3439 -0.17764 2021 2 10 59255 0.0392 0.3453 -0.17751 2021 2 11 59256 0.0388 0.3467 -0.17747 2021 2 12 59257 0.0384 0.3481 -0.17758 2021 2 13 59258 0.0380 0.3495 -0.17786 2021 2 14 59259 0.0376 0.3509 -0.17826 2021 2 15 59260 0.0373 0.3523 -0.17875 2021 2 16 59261 0.0370 0.3538 -0.17926 2021 2 17 59262 0.0367 0.3552 -0.17974 2021 2 18 59263 0.0365 0.3566 -0.18014 2021 2 19 59264 0.0363 0.3581 -0.18042 2021 2 20 59265 0.0361 0.3595 -0.18058 2021 2 21 59266 0.0359 0.3610 -0.18062 2021 2 22 59267 0.0358 0.3624 -0.18057 2021 2 23 59268 0.0357 0.3639 -0.18047 2021 2 24 59269 0.0356 0.3653 -0.18040 2021 2 25 59270 0.0356 0.3668 -0.18044 2021 2 26 59271 0.0356 0.3683 -0.18069 2021 2 27 59272 0.0356 0.3697 -0.18119 2021 2 28 59273 0.0356 0.3712 -0.18197 2021 3 1 59274 0.0357 0.3727 -0.18297 2021 3 2 59275 0.0358 0.3741 -0.18407 2021 3 3 59276 0.0359 0.3756 -0.18514 2021 3 4 59277 0.0361 0.3771 -0.18606 2021 3 5 59278 0.0363 0.3786 -0.18676 2021 3 6 59279 0.0365 0.3800 -0.18723 2021 3 7 59280 0.0367 0.3815 -0.18750 2021 3 8 59281 0.0370 0.3829 -0.18766 2021 3 9 59282 0.0373 0.3844 -0.18782 2021 3 10 59283 0.0376 0.3859 -0.18806 2021 3 11 59284 0.0380 0.3873 -0.18843 2021 3 12 59285 0.0384 0.3888 -0.18897 2021 3 13 59286 0.0388 0.3902 -0.18965 2021 3 14 59287 0.0392 0.3916 -0.19043 2021 3 15 59288 0.0397 0.3931 -0.19126 2021 3 16 59289 0.0402 0.3945 -0.19208 2021 3 17 59290 0.0407 0.3959 -0.19282 2021 3 18 59291 0.0413 0.3973 -0.19344 2021 3 19 59292 0.0419 0.3987 -0.19393 2021 3 20 59293 0.0425 0.4001 -0.19428 2021 3 21 59294 0.0431 0.4015 -0.19451 2021 3 22 59295 0.0438 0.4029 -0.19467 2021 3 23 59296 0.0445 0.4043 -0.19482 2021 3 24 59297 0.0452 0.4056 -0.19504 2021 3 25 59298 0.0459 0.4070 -0.19541 2021 3 26 59299 0.0467 0.4083 -0.19601 2021 3 27 59300 0.0475 0.4096 -0.19689 2021 3 28 59301 0.0484 0.4110 -0.19802 2021 3 29 59302 0.0492 0.4123 -0.19933 2021 3 30 59303 0.0501 0.4136 -0.20066 2021 3 31 59304 0.0510 0.4149 -0.20186 2021 4 1 59305 0.0519 0.4161 -0.20282 2021 4 2 59306 0.0529 0.4174 -0.20350 2021 4 3 59307 0.0539 0.4186 -0.20393 2021 4 4 59308 0.0549 0.4198 -0.20419 2021 4 5 59309 0.0559 0.4211 -0.20440 2021 4 6 59310 0.0570 0.4223 -0.20465 2021 4 7 59311 0.0581 0.4234 -0.20502 2021 4 8 59312 0.0592 0.4246 -0.20553 2021 4 9 59313 0.0603 0.4258 -0.20621 2021 4 10 59314 0.0615 0.4269 -0.20700 2021 4 11 59315 0.0626 0.4280 -0.20787 2021 4 12 59316 0.0638 0.4291 -0.20873 2021 4 13 59317 0.0651 0.4302 -0.20952 2021 4 14 59318 0.0663 0.4313 -0.21017 2021 4 15 59319 0.0676 0.4323 -0.21066 2021 4 16 59320 0.0689 0.4333 -0.21097 2021 4 17 59321 0.0702 0.4343 -0.21112 2021 4 18 59322 0.0715 0.4353 -0.21117 2021 4 19 59323 0.0728 0.4363 -0.21119 2021 4 20 59324 0.0742 0.4373 -0.21123 2021 4 21 59325 0.0756 0.4382 -0.21138 2021 4 22 59326 0.0770 0.4391 -0.21171 2021 4 23 59327 0.0784 0.4400 -0.21225 2021 4 24 59328 0.0799 0.4409 -0.21302 2021 4 25 59329 0.0813 0.4417 -0.21398 2021 4 26 59330 0.0828 0.4425 -0.21500 2021 4 27 59331 0.0843 0.4433 -0.21597 2021 4 28 59332 0.0858 0.4441 -0.21673 2021 4 29 59333 0.0873 0.4449 -0.21723 2021 4 30 59334 0.0889 0.4456 -0.21748 2021 5 1 59335 0.0905 0.4463 -0.21756 2021 5 2 59336 0.0920 0.4470 -0.21758 2021 5 3 59337 0.0936 0.4477 -0.21765 2021 5 4 59338 0.0952 0.4483 -0.21786 2021 5 5 59339 0.0968 0.4489 -0.21821 2021 5 6 59340 0.0985 0.4495 -0.21870 2021 5 7 59341 0.1001 0.4501 -0.21929 2021 5 8 59342 0.1018 0.4506 -0.21995 2021 5 9 59343 0.1034 0.4511 -0.22062 2021 5 10 59344 0.1051 0.4516 -0.22126 2021 5 11 59345 0.1068 0.4521 -0.22178 2021 5 12 59346 0.1085 0.4526 -0.22214 2021 5 13 59347 0.1102 0.4530 -0.22238 2021 5 14 59348 0.1119 0.4534 -0.22250 2021 5 15 59349 0.1137 0.4537 -0.22247 2021 5 16 59350 0.1154 0.4541 -0.22233 2021 5 17 59351 0.1172 0.4544 -0.22217 2021 5 18 59352 0.1189 0.4547 -0.22204 2021 5 19 59353 0.1207 0.4549 -0.22203 2021 5 20 59354 0.1224 0.4552 -0.22221 2021 5 21 59355 0.1242 0.4554 -0.22261 2021 5 22 59356 0.1260 0.4555 -0.22322 2021 5 23 59357 0.1278 0.4557 -0.22400 2021 5 24 59358 0.1295 0.4558 -0.22481 2021 5 25 59359 0.1313 0.4559 -0.22555 2021 5 26 59360 0.1331 0.4560 -0.22610 2021 5 27 59361 0.1349 0.4560 -0.22634 2021 5 28 59362 0.1367 0.4560 -0.22623 2021 5 29 59363 0.1385 0.4560 -0.22584 2021 5 30 59364 0.1403 0.4560 -0.22538 2021 5 31 59365 0.1421 0.4559 -0.22495 2021 6 1 59366 0.1439 0.4558 -0.22460 2021 6 2 59367 0.1457 0.4557 -0.22436 2021 6 3 59368 0.1475 0.4556 -0.22421 2021 6 4 59369 0.1493 0.4554 -0.22408 2021 6 5 59370 0.1511 0.4552 -0.22398 2021 6 6 59371 0.1529 0.4549 -0.22389 2021 6 7 59372 0.1547 0.4547 -0.22375 2021 6 8 59373 0.1565 0.4544 -0.22346 2021 6 9 59374 0.1583 0.4541 -0.22300 2021 6 10 59375 0.1601 0.4538 -0.22233 2021 6 11 59376 0.1618 0.4534 -0.22154 2021 6 12 59377 0.1636 0.4530 -0.22071 2021 6 13 59378 0.1654 0.4526 -0.21989 2021 6 14 59379 0.1671 0.4521 -0.21911 2021 6 15 59380 0.1689 0.4516 -0.21848 2021 6 16 59381 0.1706 0.4511 -0.21807 2021 6 17 59382 0.1723 0.4506 -0.21789 2021 6 18 59383 0.1740 0.4501 -0.21798 2021 6 19 59384 0.1758 0.4495 -0.21830 2021 6 20 59385 0.1775 0.4489 -0.21879 2021 6 21 59386 0.1792 0.4482 -0.21928 2021 6 22 59387 0.1808 0.4476 -0.21960 2021 6 23 59388 0.1825 0.4469 -0.21968 2021 6 24 59389 0.1842 0.4462 -0.21951 2021 6 25 59390 0.1858 0.4454 -0.21913 2021 6 26 59391 0.1874 0.4447 -0.21869 2021 6 27 59392 0.1891 0.4439 -0.21832 2021 6 28 59393 0.1907 0.4431 -0.21811 2021 6 29 59394 0.1923 0.4422 -0.21805 2021 6 30 59395 0.1938 0.4413 -0.21809 2021 7 1 59396 0.1954 0.4405 -0.21813 2021 7 2 59397 0.1969 0.4395 -0.21810 2021 7 3 59398 0.1985 0.4386 -0.21787 2021 7 4 59399 0.2000 0.4377 -0.21746 2021 7 5 59400 0.2015 0.4367 -0.21686 2021 7 6 59401 0.2030 0.4357 -0.21605 2021 7 7 59402 0.2044 0.4346 -0.21506 2021 7 8 59403 0.2059 0.4336 -0.21386 2021 7 9 59404 0.2073 0.4325 -0.21251 2021 7 10 59405 0.2087 0.4314 -0.21111 2021 7 11 59406 0.2101 0.4303 -0.20978 2021 7 12 59407 0.2114 0.4291 -0.20859 2021 7 13 59408 0.2128 0.4280 -0.20763 2021 7 14 59409 0.2141 0.4268 -0.20700 2021 7 15 59410 0.2154 0.4256 -0.20668 2021 7 16 59411 0.2167 0.4244 -0.20650 2021 7 17 59412 0.2179 0.4231 -0.20646 2021 7 18 59413 0.2192 0.4219 -0.20645 2021 7 19 59414 0.2204 0.4206 -0.20633 2021 7 20 59415 0.2216 0.4193 -0.20601 2021 7 21 59416 0.2227 0.4180 -0.20544 2021 7 22 59417 0.2238 0.4166 -0.20468 2021 7 23 59418 0.2250 0.4153 -0.20381 2021 7 24 59419 0.2260 0.4139 -0.20296 2021 7 25 59420 0.2271 0.4125 -0.20219 2021 7 26 59421 0.2281 0.4111 -0.20158 2021 7 27 59422 0.2292 0.4097 -0.20109 2021 7 28 59423 0.2301 0.4082 -0.20068 2021 7 29 59424 0.2311 0.4068 -0.20025 2021 7 30 59425 0.2320 0.4053 -0.19973 2021 7 31 59426 0.2329 0.4038 -0.19912 2021 8 1 59427 0.2338 0.4023 -0.19833 2021 8 2 59428 0.2347 0.4008 -0.19732 2021 8 3 59429 0.2355 0.3993 -0.19618 2021 8 4 59430 0.2363 0.3977 -0.19494 2021 8 5 59431 0.2370 0.3962 -0.19363 2021 8 6 59432 0.2378 0.3946 -0.19229 2021 8 7 59433 0.2385 0.3931 -0.19097 2021 8 8 59434 0.2391 0.3915 -0.18976 2021 8 9 59435 0.2398 0.3899 -0.18873 2021 8 10 59436 0.2404 0.3883 -0.18801 2021 8 11 59437 0.2410 0.3866 -0.18758 2021 8 12 59438 0.2416 0.3850 -0.18735 2021 8 13 59439 0.2421 0.3834 -0.18721 2021 8 14 59440 0.2426 0.3817 -0.18706 2021 8 15 59441 0.2430 0.3801 -0.18682 2021 8 16 59442 0.2435 0.3784 -0.18646 2021 8 17 59443 0.2439 0.3767 -0.18590 2021 8 18 59444 0.2442 0.3751 -0.18516 2021 8 19 59445 0.2446 0.3734 -0.18428 2021 8 20 59446 0.2449 0.3717 -0.18342 2021 8 21 59447 0.2452 0.3700 -0.18265 2021 8 22 59448 0.2454 0.3683 -0.18198 2021 8 23 59449 0.2456 0.3666 -0.18145 2021 8 24 59450 0.2458 0.3649 -0.18111 2021 8 25 59451 0.2459 0.3632 -0.18091 2021 8 26 59452 0.2461 0.3615 -0.18071 2021 8 27 59453 0.2461 0.3598 -0.18046 2021 8 28 59454 0.2462 0.3580 -0.18014 2021 8 29 59455 0.2462 0.3563 -0.17968 2021 8 30 59456 0.2462 0.3546 -0.17900 2021 8 31 59457 0.2462 0.3529 -0.17820 2021 9 1 59458 0.2461 0.3512 -0.17732 2021 9 2 59459 0.2460 0.3494 -0.17648 2021 9 3 59460 0.2458 0.3477 -0.17575 2021 9 4 59461 0.2456 0.3460 -0.17513 2021 9 5 59462 0.2454 0.3443 -0.17467 2021 9 6 59463 0.2452 0.3426 -0.17444 2021 9 7 59464 0.2449 0.3409 -0.17448 2021 9 8 59465 0.2446 0.3392 -0.17479 2021 9 9 59466 0.2443 0.3375 -0.17525 2021 9 10 59467 0.2439 0.3358 -0.17571 2021 9 11 59468 0.2435 0.3341 -0.17602 2021 9 12 59469 0.2431 0.3324 -0.17610 2021 9 13 59470 0.2426 0.3307 -0.17591 2021 9 14 59471 0.2421 0.3290 -0.17551 2021 9 15 59472 0.2416 0.3274 -0.17502 2021 9 16 59473 0.2410 0.3257 -0.17445 2021 9 17 59474 0.2404 0.3241 -0.17392 2021 9 18 59475 0.2398 0.3224 -0.17352 2021 9 19 59476 0.2391 0.3208 -0.17328 2021 9 20 59477 0.2385 0.3192 -0.17322 2021 9 21 59478 0.2377 0.3176 -0.17331 2021 9 22 59479 0.2370 0.3160 -0.17352 2021 9 23 59480 0.2362 0.3144 -0.17374 2021 9 24 59481 0.2354 0.3128 -0.17387 2021 9 25 59482 0.2346 0.3112 -0.17383 2021 9 26 59483 0.2337 0.3097 -0.17363 2021 9 27 59484 0.2328 0.3081 -0.17331 2021 9 28 59485 0.2319 0.3066 -0.17292 2021 9 29 59486 0.2309 0.3051 -0.17250 2021 9 30 59487 0.2299 0.3036 -0.17210 2021 10 1 59488 0.2289 0.3021 -0.17179 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) 59108 -116.95 0.29 -9.62 0.09 59109 -116.95 0.29 -9.34 0.09 59110 -117.16 0.29 -9.23 0.09 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 59108 0.086 0.114 -0.080 0.093 59109 0.072 0.114 -0.087 0.093 59110 0.057 0.114 -0.094 0.093 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).