********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 5 November 2020 Vol. XXXIII No. 045 ______________________________________________________________________ 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 30 59152 0.16221 .00009 0.29823 .00009 -0.174761 0.000020 20 10 31 59153 0.16045 .00009 0.29776 .00009 -0.175066 0.000018 20 11 1 59154 0.15857 .00009 0.29711 .00009 -0.175329 0.000016 20 11 2 59155 0.15676 .00009 0.29661 .00009 -0.175490 0.000011 20 11 3 59156 0.15512 .00009 0.29608 .00009 -0.175541 0.000009 20 11 4 59157 0.15388 .00009 0.29541 .00009 -0.175487 0.000008 20 11 5 59158 0.15300 .00009 0.29464 .00009 -0.175297 0.000008 IERS Final Values MJD x y UT1-UTC " " s 20 9 2 59094 0.2149 0.3594 -0.18444 20 9 3 59095 0.2140 0.3579 -0.18367 20 9 4 59096 0.2132 0.3560 -0.18302 20 9 5 59097 0.2128 0.3544 -0.18244 20 9 6 59098 0.2123 0.3532 -0.18187 20 9 7 59099 0.2118 0.3518 -0.18129 20 9 8 59100 0.2112 0.3503 -0.18066 20 9 9 59101 0.2109 0.3495 -0.17995 20 9 10 59102 0.2109 0.3488 -0.17917 20 9 11 59103 0.2109 0.3484 -0.17835 20 9 12 59104 0.2103 0.3476 -0.17752 20 9 13 59105 0.2094 0.3464 -0.17674 20 9 14 59106 0.2087 0.3455 -0.17611 20 9 15 59107 0.2081 0.3442 -0.17571 20 9 16 59108 0.2079 0.3428 -0.17555 20 9 17 59109 0.2078 0.3415 -0.17566 20 9 18 59110 0.2075 0.3400 -0.17598 20 9 19 59111 0.2068 0.3386 -0.17641 20 9 20 59112 0.2058 0.3372 -0.17680 20 9 21 59113 0.2046 0.3360 -0.17702 20 9 22 59114 0.2034 0.3350 -0.17702 20 9 23 59115 0.2024 0.3340 -0.17683 20 9 24 59116 0.2014 0.3330 -0.17648 20 9 25 59117 0.2001 0.3318 -0.17603 20 9 26 59118 0.1987 0.3305 -0.17553 20 9 27 59119 0.1972 0.3293 -0.17502 20 9 28 59120 0.1961 0.3279 -0.17452 20 9 29 59121 0.1950 0.3266 -0.17408 20 9 30 59122 0.1942 0.3253 -0.17371 20 10 1 59123 0.1936 0.3244 -0.17344 _______________________________________________________________________ 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 + 0.0247 cos A - 0.0828 sin A + 0.0115 cos C + 0.0079 sin C y = 0.3601 - 0.0769 cos A - 0.0233 sin A + 0.0079 cos C - 0.0115 sin C UT1-UTC = -0.1748 - 0.00001 (MJD - 59166) - (UT2-UT1) where A = 2*pi*(MJD-59158)/365.25 and C = 2*pi*(MJD-59158)/435. TAI-UTC(MJD 59159) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59158)**0.80 S t = 0.00025 (MJD-59158)**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 6 59159 0.1521 0.2941 -0.17499 2020 11 7 59160 0.1512 0.2934 -0.17468 2020 11 8 59161 0.1502 0.2929 -0.17451 2020 11 9 59162 0.1490 0.2925 -0.17454 2020 11 10 59163 0.1476 0.2921 -0.17483 2020 11 11 59164 0.1463 0.2917 -0.17538 2020 11 12 59165 0.1449 0.2913 -0.17616 2020 11 13 59166 0.1436 0.2909 -0.17705 2020 11 14 59167 0.1422 0.2905 -0.17792 2020 11 15 59168 0.1409 0.2901 -0.17861 2020 11 16 59169 0.1395 0.2898 -0.17903 2020 11 17 59170 0.1381 0.2895 -0.17916 2020 11 18 59171 0.1367 0.2892 -0.17909 2020 11 19 59172 0.1353 0.2890 -0.17892 2020 11 20 59173 0.1339 0.2888 -0.17875 2020 11 21 59174 0.1325 0.2886 -0.17862 2020 11 22 59175 0.1311 0.2885 -0.17861 2020 11 23 59176 0.1297 0.2883 -0.17873 2020 11 24 59177 0.1282 0.2882 -0.17898 2020 11 25 59178 0.1268 0.2882 -0.17930 2020 11 26 59179 0.1253 0.2881 -0.17962 2020 11 27 59180 0.1239 0.2881 -0.17990 2020 11 28 59181 0.1224 0.2881 -0.18008 2020 11 29 59182 0.1209 0.2881 -0.18011 2020 11 30 59183 0.1195 0.2881 -0.17997 2020 12 1 59184 0.1180 0.2882 -0.17967 2020 12 2 59185 0.1166 0.2883 -0.17922 2020 12 3 59186 0.1151 0.2884 -0.17869 2020 12 4 59187 0.1136 0.2885 -0.17814 2020 12 5 59188 0.1122 0.2887 -0.17763 2020 12 6 59189 0.1107 0.2889 -0.17726 2020 12 7 59190 0.1093 0.2891 -0.17708 2020 12 8 59191 0.1078 0.2893 -0.17714 2020 12 9 59192 0.1063 0.2896 -0.17743 2020 12 10 59193 0.1049 0.2898 -0.17787 2020 12 11 59194 0.1034 0.2901 -0.17834 2020 12 12 59195 0.1020 0.2905 -0.17871 2020 12 13 59196 0.1006 0.2908 -0.17888 2020 12 14 59197 0.0991 0.2912 -0.17880 2020 12 15 59198 0.0977 0.2916 -0.17848 2020 12 16 59199 0.0963 0.2920 -0.17802 2020 12 17 59200 0.0949 0.2925 -0.17751 2020 12 18 59201 0.0935 0.2930 -0.17703 2020 12 19 59202 0.0921 0.2935 -0.17665 2020 12 20 59203 0.0907 0.2940 -0.17639 2020 12 21 59204 0.0893 0.2945 -0.17621 2020 12 22 59205 0.0879 0.2951 -0.17610 2020 12 23 59206 0.0866 0.2957 -0.17602 2020 12 24 59207 0.0852 0.2963 -0.17592 2020 12 25 59208 0.0839 0.2969 -0.17577 2020 12 26 59209 0.0825 0.2976 -0.17551 2020 12 27 59210 0.0812 0.2983 -0.17512 2020 12 28 59211 0.0799 0.2990 -0.17460 2020 12 29 59212 0.0786 0.2997 -0.17397 2020 12 30 59213 0.0773 0.3004 -0.17327 2020 12 31 59214 0.0761 0.3012 -0.17257 2021 1 1 59215 0.0748 0.3020 -0.17194 2021 1 2 59216 0.0736 0.3028 -0.17147 2021 1 3 59217 0.0724 0.3036 -0.17121 2021 1 4 59218 0.0711 0.3045 -0.17119 2021 1 5 59219 0.0699 0.3054 -0.17138 2021 1 6 59220 0.0688 0.3063 -0.17171 2021 1 7 59221 0.0676 0.3072 -0.17210 2021 1 8 59222 0.0665 0.3081 -0.17242 2021 1 9 59223 0.0653 0.3091 -0.17258 2021 1 10 59224 0.0642 0.3100 -0.17252 2021 1 11 59225 0.0631 0.3110 -0.17224 2021 1 12 59226 0.0620 0.3120 -0.17180 2021 1 13 59227 0.0610 0.3131 -0.17129 2021 1 14 59228 0.0599 0.3141 -0.17081 2021 1 15 59229 0.0589 0.3152 -0.17044 2021 1 16 59230 0.0579 0.3163 -0.17021 2021 1 17 59231 0.0569 0.3174 -0.17010 2021 1 18 59232 0.0560 0.3185 -0.17010 2021 1 19 59233 0.0550 0.3196 -0.17014 2021 1 20 59234 0.0541 0.3208 -0.17019 2021 1 21 59235 0.0532 0.3219 -0.17018 2021 1 22 59236 0.0523 0.3231 -0.17009 2021 1 23 59237 0.0515 0.3243 -0.16988 2021 1 24 59238 0.0507 0.3255 -0.16954 2021 1 25 59239 0.0498 0.3268 -0.16908 2021 1 26 59240 0.0491 0.3280 -0.16854 2021 1 27 59241 0.0483 0.3292 -0.16798 2021 1 28 59242 0.0476 0.3305 -0.16747 2021 1 29 59243 0.0468 0.3318 -0.16709 2021 1 30 59244 0.0462 0.3331 -0.16691 2021 1 31 59245 0.0455 0.3344 -0.16699 2021 2 1 59246 0.0448 0.3357 -0.16731 2021 2 2 59247 0.0442 0.3370 -0.16780 2021 2 3 59248 0.0436 0.3384 -0.16836 2021 2 4 59249 0.0431 0.3397 -0.16888 2021 2 5 59250 0.0425 0.3411 -0.16925 2021 2 6 59251 0.0420 0.3425 -0.16943 2021 2 7 59252 0.0415 0.3439 -0.16940 2021 2 8 59253 0.0411 0.3453 -0.16922 2021 2 9 59254 0.0406 0.3467 -0.16897 2021 2 10 59255 0.0402 0.3481 -0.16876 2021 2 11 59256 0.0398 0.3495 -0.16865 2021 2 12 59257 0.0395 0.3509 -0.16870 2021 2 13 59258 0.0391 0.3523 -0.16891 2021 2 14 59259 0.0388 0.3538 -0.16926 2021 2 15 59260 0.0386 0.3552 -0.16969 2021 2 16 59261 0.0383 0.3567 -0.17016 2021 2 17 59262 0.0381 0.3581 -0.17060 2021 2 18 59263 0.0379 0.3596 -0.17095 2021 2 19 59264 0.0377 0.3611 -0.17120 2021 2 20 59265 0.0376 0.3625 -0.17132 2021 2 21 59266 0.0375 0.3640 -0.17131 2021 2 22 59267 0.0374 0.3655 -0.17112 2021 2 23 59268 0.0374 0.3670 -0.17089 2021 2 24 59269 0.0373 0.3685 -0.17068 2021 2 25 59270 0.0373 0.3699 -0.17058 2021 2 26 59271 0.0374 0.3714 -0.17068 2021 2 27 59272 0.0374 0.3729 -0.17103 2021 2 28 59273 0.0375 0.3744 -0.17166 2021 3 1 59274 0.0376 0.3759 -0.17250 2021 3 2 59275 0.0378 0.3774 -0.17345 2021 3 3 59276 0.0380 0.3789 -0.17437 2021 3 4 59277 0.0382 0.3804 -0.17513 2021 3 5 59278 0.0384 0.3818 -0.17567 2021 3 6 59279 0.0387 0.3833 -0.17597 2021 3 7 59280 0.0390 0.3848 -0.17608 2021 3 8 59281 0.0393 0.3863 -0.17609 2021 3 9 59282 0.0396 0.3877 -0.17609 2021 3 10 59283 0.0400 0.3892 -0.17616 2021 3 11 59284 0.0404 0.3907 -0.17638 2021 3 12 59285 0.0408 0.3921 -0.17675 2021 3 13 59286 0.0413 0.3936 -0.17727 2021 3 14 59287 0.0418 0.3950 -0.17789 2021 3 15 59288 0.0423 0.3965 -0.17855 2021 3 16 59289 0.0428 0.3979 -0.17919 2021 3 17 59290 0.0434 0.3993 -0.17976 2021 3 18 59291 0.0440 0.4008 -0.18022 2021 3 19 59292 0.0446 0.4022 -0.18053 2021 3 20 59293 0.0453 0.4036 -0.18071 2021 3 21 59294 0.0460 0.4050 -0.18078 2021 3 22 59295 0.0467 0.4063 -0.18077 2021 3 23 59296 0.0474 0.4077 -0.18075 2021 3 24 59297 0.0482 0.4091 -0.18080 2021 3 25 59298 0.0490 0.4104 -0.18101 2021 3 26 59299 0.0498 0.4118 -0.18145 2021 3 27 59300 0.0506 0.4131 -0.18218 2021 3 28 59301 0.0515 0.4144 -0.18317 2021 3 29 59302 0.0524 0.4157 -0.18434 2021 3 30 59303 0.0533 0.4170 -0.18554 2021 3 31 59304 0.0543 0.4183 -0.18662 2021 4 1 59305 0.0552 0.4196 -0.18747 2021 4 2 59306 0.0562 0.4208 -0.18804 2021 4 3 59307 0.0573 0.4221 -0.18838 2021 4 4 59308 0.0583 0.4233 -0.18855 2021 4 5 59309 0.0594 0.4245 -0.18868 2021 4 6 59310 0.0605 0.4257 -0.18885 2021 4 7 59311 0.0616 0.4269 -0.18913 2021 4 8 59312 0.0627 0.4280 -0.18955 2021 4 9 59313 0.0639 0.4292 -0.19011 2021 4 10 59314 0.0651 0.4303 -0.19077 2021 4 11 59315 0.0663 0.4314 -0.19149 2021 4 12 59316 0.0675 0.4325 -0.19220 2021 4 13 59317 0.0688 0.4336 -0.19284 2021 4 14 59318 0.0700 0.4346 -0.19337 2021 4 15 59319 0.0713 0.4356 -0.19374 2021 4 16 59320 0.0727 0.4367 -0.19397 2021 4 17 59321 0.0740 0.4377 -0.19405 2021 4 18 59322 0.0753 0.4386 -0.19403 2021 4 19 59323 0.0767 0.4396 -0.19396 2021 4 20 59324 0.0781 0.4405 -0.19392 2021 4 21 59325 0.0795 0.4414 -0.19398 2021 4 22 59326 0.0810 0.4423 -0.19422 2021 4 23 59327 0.0824 0.4432 -0.19472 2021 4 24 59328 0.0839 0.4440 -0.19548 2021 4 25 59329 0.0854 0.4449 -0.19647 2021 4 26 59330 0.0869 0.4457 -0.19757 2021 4 27 59331 0.0884 0.4465 -0.19861 2021 4 28 59332 0.0899 0.4472 -0.19947 2021 4 29 59333 0.0915 0.4479 -0.20004 2021 4 30 59334 0.0930 0.4487 -0.20031 2021 5 1 59335 0.0946 0.4493 -0.20036 2021 5 2 59336 0.0962 0.4500 -0.20029 2021 5 3 59337 0.0978 0.4506 -0.20022 2021 5 4 59338 0.0994 0.4513 -0.20021 2021 5 5 59339 0.1011 0.4519 -0.20032 2021 5 6 59340 0.1027 0.4524 -0.20053 2021 5 7 59341 0.1044 0.4530 -0.20081 2021 5 8 59342 0.1060 0.4535 -0.20113 2021 5 9 59343 0.1077 0.4540 -0.20142 2021 5 10 59344 0.1094 0.4544 -0.20162 2021 5 11 59345 0.1111 0.4549 -0.20170 2021 5 12 59346 0.1128 0.4553 -0.20161 2021 5 13 59347 0.1146 0.4557 -0.20136 2021 5 14 59348 0.1163 0.4560 -0.20097 2021 5 15 59349 0.1180 0.4564 -0.20049 2021 5 16 59350 0.1198 0.4567 -0.19999 2021 5 17 59351 0.1215 0.4569 -0.19956 2021 5 18 59352 0.1233 0.4572 -0.19927 2021 5 19 59353 0.1250 0.4574 -0.19919 2021 5 20 59354 0.1268 0.4576 -0.19937 2021 5 21 59355 0.1286 0.4578 -0.19983 2021 5 22 59356 0.1304 0.4579 -0.20055 2021 5 23 59357 0.1322 0.4581 -0.20145 2021 5 24 59358 0.1340 0.4581 -0.20237 2021 5 25 59359 0.1357 0.4582 -0.20316 2021 5 26 59360 0.1375 0.4582 -0.20368 2021 5 27 59361 0.1393 0.4582 -0.20388 2021 5 28 59362 0.1411 0.4582 -0.20378 2021 5 29 59363 0.1429 0.4582 -0.20349 2021 5 30 59364 0.1447 0.4581 -0.20311 2021 5 31 59365 0.1465 0.4580 -0.20275 2021 6 1 59366 0.1483 0.4579 -0.20247 2021 6 2 59367 0.1501 0.4577 -0.20228 2021 6 3 59368 0.1519 0.4575 -0.20216 2021 6 4 59369 0.1537 0.4573 -0.20204 2021 6 5 59370 0.1555 0.4570 -0.20188 2021 6 6 59371 0.1573 0.4568 -0.20163 2021 6 7 59372 0.1591 0.4565 -0.20126 2021 6 8 59373 0.1609 0.4561 -0.20075 2021 6 9 59374 0.1627 0.4558 -0.20008 2021 6 10 59375 0.1644 0.4554 -0.19928 2021 6 11 59376 0.1662 0.4550 -0.19835 2021 6 12 59377 0.1680 0.4546 -0.19732 2021 6 13 59378 0.1697 0.4541 -0.19629 2021 6 14 59379 0.1715 0.4536 -0.19538 2021 6 15 59380 0.1732 0.4531 -0.19467 2021 6 16 59381 0.1749 0.4525 -0.19423 2021 6 17 59382 0.1767 0.4520 -0.19403 2021 6 18 59383 0.1784 0.4514 -0.19408 2021 6 19 59384 0.1801 0.4507 -0.19432 2021 6 20 59385 0.1818 0.4501 -0.19460 2021 6 21 59386 0.1834 0.4494 -0.19481 2021 6 22 59387 0.1851 0.4487 -0.19481 2021 6 23 59388 0.1868 0.4480 -0.19454 2021 6 24 59389 0.1884 0.4472 -0.19396 2021 6 25 59390 0.1901 0.4464 -0.19315 2021 6 26 59391 0.1917 0.4456 -0.19221 2021 6 27 59392 0.1933 0.4448 -0.19128 2021 6 28 59393 0.1949 0.4439 -0.19042 2021 6 29 59394 0.1964 0.4430 -0.18964 2021 6 30 59395 0.1980 0.4421 -0.18893 2021 7 1 59396 0.1996 0.4412 -0.18830 2021 7 2 59397 0.2011 0.4402 -0.18764 2021 7 3 59398 0.2026 0.4392 -0.18690 2021 7 4 59399 0.2041 0.4382 -0.18609 2021 7 5 59400 0.2056 0.4372 -0.18516 2021 7 6 59401 0.2070 0.4361 -0.18411 2021 7 7 59402 0.2085 0.4351 -0.18289 2021 7 8 59403 0.2099 0.4340 -0.18157 2021 7 9 59404 0.2113 0.4328 -0.18025 2021 7 10 59405 0.2127 0.4317 -0.17894 2021 7 11 59406 0.2140 0.4305 -0.17772 2021 7 12 59407 0.2154 0.4294 -0.17669 2021 7 13 59408 0.2167 0.4281 -0.17586 2021 7 14 59409 0.2180 0.4269 -0.17524 2021 7 15 59410 0.2193 0.4257 -0.17486 2021 7 16 59411 0.2205 0.4244 -0.17466 2021 7 17 59412 0.2218 0.4231 -0.17455 2021 7 18 59413 0.2230 0.4218 -0.17448 2021 7 19 59414 0.2242 0.4205 -0.17433 2021 7 20 59415 0.2253 0.4191 -0.17395 2021 7 21 59416 0.2265 0.4178 -0.17334 2021 7 22 59417 0.2276 0.4164 -0.17259 2021 7 23 59418 0.2287 0.4150 -0.17179 2021 7 24 59419 0.2297 0.4136 -0.17099 2021 7 25 59420 0.2308 0.4121 -0.17029 2021 7 26 59421 0.2318 0.4107 -0.16974 2021 7 27 59422 0.2328 0.4092 -0.16932 2021 7 28 59423 0.2337 0.4077 -0.16902 2021 7 29 59424 0.2347 0.4062 -0.16875 2021 7 30 59425 0.2356 0.4047 -0.16845 2021 7 31 59426 0.2365 0.4032 -0.16805 2021 8 1 59427 0.2373 0.4016 -0.16754 2021 8 2 59428 0.2381 0.4001 -0.16690 2021 8 3 59429 0.2389 0.3985 -0.16615 2021 8 4 59430 0.2397 0.3969 -0.16531 2021 8 5 59431 0.2404 0.3953 -0.16437 2021 8 6 59432 0.2412 0.3937 -0.16330 2021 8 7 59433 0.2418 0.3921 -0.16215 2021 8 8 59434 0.2425 0.3905 -0.16108 2021 8 9 59435 0.2431 0.3888 -0.16018 2021 8 10 59436 0.2437 0.3872 -0.15947 2021 8 11 59437 0.2443 0.3855 -0.15899 2021 8 12 59438 0.2448 0.3839 -0.15871 2021 8 13 59439 0.2453 0.3822 -0.15851 2021 8 14 59440 0.2458 0.3805 -0.15836 2021 8 15 59441 0.2462 0.3788 -0.15817 2021 8 16 59442 0.2466 0.3771 -0.15786 2021 8 17 59443 0.2470 0.3754 -0.15735 2021 8 18 59444 0.2473 0.3737 -0.15664 2021 8 19 59445 0.2477 0.3720 -0.15579 2021 8 20 59446 0.2479 0.3702 -0.15495 2021 8 21 59447 0.2482 0.3685 -0.15428 2021 8 22 59448 0.2484 0.3668 -0.15383 2021 8 23 59449 0.2486 0.3650 -0.15358 2021 8 24 59450 0.2488 0.3633 -0.15352 2021 8 25 59451 0.2489 0.3615 -0.15360 2021 8 26 59452 0.2490 0.3598 -0.15373 2021 8 27 59453 0.2490 0.3580 -0.15387 2021 8 28 59454 0.2491 0.3563 -0.15396 2021 8 29 59455 0.2491 0.3545 -0.15402 2021 8 30 59456 0.2490 0.3528 -0.15397 2021 8 31 59457 0.2489 0.3510 -0.15379 2021 9 1 59458 0.2488 0.3493 -0.15353 2021 9 2 59459 0.2487 0.3475 -0.15321 2021 9 3 59460 0.2485 0.3458 -0.15290 2021 9 4 59461 0.2483 0.3440 -0.15271 2021 9 5 59462 0.2481 0.3423 -0.15272 2021 9 6 59463 0.2479 0.3406 -0.15303 2021 9 7 59464 0.2476 0.3388 -0.15360 2021 9 8 59465 0.2472 0.3371 -0.15438 2021 9 9 59466 0.2469 0.3354 -0.15526 2021 9 10 59467 0.2465 0.3336 -0.15610 2021 9 11 59468 0.2461 0.3319 -0.15669 2021 9 12 59469 0.2456 0.3302 -0.15701 2021 9 13 59470 0.2451 0.3285 -0.15705 2021 9 14 59471 0.2446 0.3268 -0.15684 2021 9 15 59472 0.2440 0.3251 -0.15646 2021 9 16 59473 0.2435 0.3234 -0.15600 2021 9 17 59474 0.2429 0.3217 -0.15556 2021 9 18 59475 0.2422 0.3201 -0.15527 2021 9 19 59476 0.2415 0.3184 -0.15520 2021 9 20 59477 0.2408 0.3168 -0.15535 2021 9 21 59478 0.2401 0.3151 -0.15568 2021 9 22 59479 0.2393 0.3135 -0.15618 2021 9 23 59480 0.2385 0.3119 -0.15676 2021 9 24 59481 0.2377 0.3103 -0.15723 2021 9 25 59482 0.2368 0.3087 -0.15761 2021 9 26 59483 0.2360 0.3071 -0.15787 2021 9 27 59484 0.2350 0.3056 -0.15800 2021 9 28 59485 0.2341 0.3040 -0.15800 2021 9 29 59486 0.2331 0.3025 -0.15792 2021 9 30 59487 0.2321 0.3010 -0.15782 2021 10 1 59488 0.2311 0.2995 -0.15778 2021 10 2 59489 0.2300 0.2980 -0.15787 2021 10 3 59490 0.2289 0.2965 -0.15814 2021 10 4 59491 0.2278 0.2951 -0.15865 2021 10 5 59492 0.2267 0.2936 -0.15941 2021 10 6 59493 0.2255 0.2922 -0.16033 2021 10 7 59494 0.2243 0.2908 -0.16128 2021 10 8 59495 0.2231 0.2894 -0.16212 2021 10 9 59496 0.2218 0.2880 -0.16277 2021 10 10 59497 0.2206 0.2867 -0.16311 2021 10 11 59498 0.2193 0.2854 -0.16312 2021 10 12 59499 0.2179 0.2840 -0.16296 2021 10 13 59500 0.2166 0.2828 -0.16276 2021 10 14 59501 0.2152 0.2815 -0.16264 2021 10 15 59502 0.2138 0.2802 -0.16264 2021 10 16 59503 0.2124 0.2790 -0.16281 2021 10 17 59504 0.2110 0.2778 -0.16316 2021 10 18 59505 0.2095 0.2766 -0.16363 2021 10 19 59506 0.2080 0.2755 -0.16424 2021 10 20 59507 0.2065 0.2743 -0.16490 2021 10 21 59508 0.2049 0.2732 -0.16550 2021 10 22 59509 0.2034 0.2721 -0.16594 2021 10 23 59510 0.2018 0.2711 -0.16621 2021 10 24 59511 0.2002 0.2700 -0.16632 2021 10 25 59512 0.1986 0.2690 -0.16634 2021 10 26 59513 0.1970 0.2680 -0.16627 2021 10 27 59514 0.1953 0.2670 -0.16616 2021 10 28 59515 0.1936 0.2661 -0.16604 2021 10 29 59516 0.1919 0.2652 -0.16603 2021 10 30 59517 0.1902 0.2643 -0.16617 2021 10 31 59518 0.1885 0.2634 -0.16646 2021 11 1 59519 0.1868 0.2626 -0.16696 2021 11 2 59520 0.1850 0.2618 -0.16772 2021 11 3 59521 0.1832 0.2610 -0.16869 2021 11 4 59522 0.1814 0.2602 -0.16967 2021 11 5 59523 0.1796 0.2595 -0.17052 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) 59139 -115.55 0.16 -8.16 0.07 59140 -115.48 0.17 -8.47 0.04 59141 -115.19 0.17 -8.55 0.04 59142 -114.92 0.06 -8.35 0.03 59143 -114.82 0.40 -8.16 0.12 59144 -114.79 0.40 -8.23 0.12 59145 -114.74 0.40 -8.42 0.12 IERS Celestial Pole Offset Final Series MJD dpsi deps (msec. of arc) 59094 -117.4 -10.2 59095 -117.4 -9.9 59096 -117.5 -9.7 59097 -117.5 -9.6 59098 -117.5 -9.6 59099 -117.2 -9.7 59100 -117.1 -9.7 59101 -117.3 -9.7 59102 -118.1 -9.9 59103 -118.9 -10.1 59104 -118.8 -10.2 59105 -118.2 -10.1 59106 -117.6 -10.0 59107 -117.1 -9.8 59108 -117.0 -9.6 59109 -117.2 -9.4 59110 -117.5 -9.3 59111 -117.8 -9.5 59112 -118.0 -9.8 59113 -118.0 -10.0 59114 -117.9 -9.9 59115 -117.8 -9.7 59116 -117.8 -9.7 59117 -117.8 -9.7 59118 -117.8 -9.7 59119 -117.7 -9.6 59120 -117.4 -9.6 59121 -117.1 -9.6 59122 -116.8 -9.4 59123 -116.6 -9.1 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 59139 0.077 0.065 0.021 0.068 59140 0.081 0.067 0.035 0.037 59141 0.089 0.067 0.049 0.037 59142 0.101 0.026 0.065 0.034 59143 0.119 0.158 0.082 0.116 59144 0.141 0.158 0.100 0.116 59145 0.166 0.158 0.119 0.116 IAU2000A Celestial Pole Offset Final Series MJD dX dY (msec. of arc) 59094 0.17 -0.06 59095 0.17 -0.08 59096 0.17 -0.10 59097 0.17 -0.10 59098 0.18 -0.09 59099 0.18 -0.08 59100 0.18 -0.07 59101 0.19 -0.06 59102 0.07 -0.05 59103 -0.07 -0.04 59104 -0.07 -0.03 59105 -0.02 -0.02 59106 0.03 -0.02 59107 0.08 -0.01 59108 0.04 -0.05 59109 -0.02 -0.10 59110 -0.08 -0.15 59111 -0.08 -0.17 59112 -0.04 -0.17 59113 -0.01 -0.18 59114 0.02 -0.18 59115 0.03 -0.14 59116 0.04 -0.07 59117 0.04 -0.01 59118 0.04 0.01 59119 0.05 0.02 59120 0.06 0.02 59121 0.07 0.03 59122 0.09 0.00 59123 0.12 -0.03 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).