********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 12 November 2020 Vol. XXXIII No. 046 ______________________________________________________________________ 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 6 59159 0.15214 .00009 0.29359 .00009 -0.175055 0.000009 20 11 7 59160 0.15088 .00009 0.29280 .00009 -0.174729 0.000009 20 11 8 59161 0.14937 .00009 0.29242 .00009 -0.174520 0.000010 20 11 9 59162 0.14781 .00009 0.29207 .00009 -0.174583 0.000013 20 11 10 59163 0.14613 .00009 0.29167 .00009 -0.174915 0.000014 20 11 11 59164 0.14419 .00009 0.29123 .00009 -0.175507 0.000017 20 11 12 59165 0.14212 .00009 0.29071 .00009 -0.176317 0.000018 _______________________________________________________________________ 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 + 0.0139 cos A - 0.0876 sin A + 0.0117 cos C + 0.0090 sin C y = 0.3597 - 0.0812 cos A - 0.0132 sin A + 0.0090 cos C - 0.0117 sin C UT1-UTC = -0.1746 - 0.00000 (MJD - 59173) - (UT2-UT1) where A = 2*pi*(MJD-59165)/365.25 and C = 2*pi*(MJD-59165)/435. TAI-UTC(MJD 59166) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59165)**0.80 S t = 0.00025 (MJD-59165)**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 13 59166 0.1403 0.2901 -0.17727 2020 11 14 59167 0.1384 0.2895 -0.17821 2020 11 15 59168 0.1367 0.2890 -0.17896 2020 11 16 59169 0.1351 0.2887 -0.17943 2020 11 17 59170 0.1337 0.2884 -0.17960 2020 11 18 59171 0.1322 0.2882 -0.17956 2020 11 19 59172 0.1307 0.2880 -0.17940 2020 11 20 59173 0.1291 0.2878 -0.17924 2020 11 21 59174 0.1276 0.2877 -0.17914 2020 11 22 59175 0.1260 0.2876 -0.17915 2020 11 23 59176 0.1245 0.2874 -0.17928 2020 11 24 59177 0.1230 0.2874 -0.17953 2020 11 25 59178 0.1215 0.2873 -0.17984 2020 11 26 59179 0.1200 0.2873 -0.18016 2020 11 27 59180 0.1185 0.2873 -0.18042 2020 11 28 59181 0.1171 0.2874 -0.18060 2020 11 29 59182 0.1156 0.2875 -0.18068 2020 11 30 59183 0.1141 0.2876 -0.18061 2020 12 1 59184 0.1126 0.2877 -0.18039 2020 12 2 59185 0.1111 0.2878 -0.18004 2020 12 3 59186 0.1097 0.2880 -0.17964 2020 12 4 59187 0.1082 0.2882 -0.17924 2020 12 5 59188 0.1067 0.2884 -0.17894 2020 12 6 59189 0.1053 0.2887 -0.17877 2020 12 7 59190 0.1038 0.2890 -0.17880 2020 12 8 59191 0.1024 0.2893 -0.17905 2020 12 9 59192 0.1009 0.2896 -0.17949 2020 12 10 59193 0.0995 0.2899 -0.18005 2020 12 11 59194 0.0981 0.2903 -0.18061 2020 12 12 59195 0.0966 0.2907 -0.18106 2020 12 13 59196 0.0952 0.2911 -0.18128 2020 12 14 59197 0.0938 0.2915 -0.18123 2020 12 15 59198 0.0924 0.2920 -0.18093 2020 12 16 59199 0.0910 0.2925 -0.18046 2020 12 17 59200 0.0896 0.2930 -0.17994 2020 12 18 59201 0.0882 0.2935 -0.17946 2020 12 19 59202 0.0869 0.2941 -0.17910 2020 12 20 59203 0.0855 0.2947 -0.17887 2020 12 21 59204 0.0841 0.2953 -0.17874 2020 12 22 59205 0.0828 0.2959 -0.17868 2020 12 23 59206 0.0815 0.2966 -0.17866 2020 12 24 59207 0.0801 0.2972 -0.17861 2020 12 25 59208 0.0788 0.2979 -0.17851 2020 12 26 59209 0.0775 0.2987 -0.17829 2020 12 27 59210 0.0762 0.2994 -0.17794 2020 12 28 59211 0.0750 0.3002 -0.17744 2020 12 29 59212 0.0737 0.3009 -0.17681 2020 12 30 59213 0.0725 0.3017 -0.17609 2020 12 31 59214 0.0712 0.3026 -0.17534 2021 1 1 59215 0.0700 0.3034 -0.17464 2021 1 2 59216 0.0688 0.3043 -0.17407 2021 1 3 59217 0.0676 0.3052 -0.17371 2021 1 4 59218 0.0664 0.3061 -0.17357 2021 1 5 59219 0.0653 0.3070 -0.17364 2021 1 6 59220 0.0641 0.3080 -0.17386 2021 1 7 59221 0.0630 0.3089 -0.17413 2021 1 8 59222 0.0619 0.3099 -0.17435 2021 1 9 59223 0.0608 0.3109 -0.17441 2021 1 10 59224 0.0597 0.3120 -0.17427 2021 1 11 59225 0.0587 0.3130 -0.17393 2021 1 12 59226 0.0577 0.3141 -0.17345 2021 1 13 59227 0.0566 0.3151 -0.17292 2021 1 14 59228 0.0556 0.3162 -0.17244 2021 1 15 59229 0.0547 0.3174 -0.17207 2021 1 16 59230 0.0537 0.3185 -0.17185 2021 1 17 59231 0.0528 0.3196 -0.17176 2021 1 18 59232 0.0519 0.3208 -0.17177 2021 1 19 59233 0.0510 0.3220 -0.17183 2021 1 20 59234 0.0501 0.3232 -0.17189 2021 1 21 59235 0.0492 0.3244 -0.17189 2021 1 22 59236 0.0484 0.3256 -0.17180 2021 1 23 59237 0.0476 0.3269 -0.17159 2021 1 24 59238 0.0468 0.3281 -0.17124 2021 1 25 59239 0.0461 0.3294 -0.17077 2021 1 26 59240 0.0453 0.3307 -0.17021 2021 1 27 59241 0.0446 0.3320 -0.16962 2021 1 28 59242 0.0439 0.3333 -0.16908 2021 1 29 59243 0.0433 0.3346 -0.16867 2021 1 30 59244 0.0426 0.3360 -0.16847 2021 1 31 59245 0.0420 0.3373 -0.16852 2021 2 1 59246 0.0414 0.3387 -0.16880 2021 2 2 59247 0.0408 0.3400 -0.16925 2021 2 3 59248 0.0403 0.3414 -0.16976 2021 2 4 59249 0.0398 0.3428 -0.17021 2021 2 5 59250 0.0393 0.3442 -0.17052 2021 2 6 59251 0.0388 0.3456 -0.17062 2021 2 7 59252 0.0384 0.3470 -0.17052 2021 2 8 59253 0.0380 0.3485 -0.17025 2021 2 9 59254 0.0376 0.3499 -0.16990 2021 2 10 59255 0.0373 0.3514 -0.16958 2021 2 11 59256 0.0369 0.3528 -0.16937 2021 2 12 59257 0.0366 0.3543 -0.16931 2021 2 13 59258 0.0363 0.3557 -0.16942 2021 2 14 59259 0.0361 0.3572 -0.16966 2021 2 15 59260 0.0359 0.3587 -0.16999 2021 2 16 59261 0.0357 0.3602 -0.17035 2021 2 17 59262 0.0355 0.3617 -0.17069 2021 2 18 59263 0.0354 0.3631 -0.17096 2021 2 19 59264 0.0353 0.3646 -0.17112 2021 2 20 59265 0.0352 0.3661 -0.17117 2021 2 21 59266 0.0351 0.3676 -0.17110 2021 2 22 59267 0.0351 0.3691 -0.17094 2021 2 23 59268 0.0351 0.3707 -0.17075 2021 2 24 59269 0.0352 0.3722 -0.17059 2021 2 25 59270 0.0352 0.3737 -0.17055 2021 2 26 59271 0.0353 0.3752 -0.17071 2021 2 27 59272 0.0354 0.3767 -0.17114 2021 2 28 59273 0.0356 0.3782 -0.17184 2021 3 1 59274 0.0358 0.3797 -0.17267 2021 3 2 59275 0.0360 0.3812 -0.17361 2021 3 3 59276 0.0362 0.3827 -0.17452 2021 3 4 59277 0.0365 0.3842 -0.17527 2021 3 5 59278 0.0368 0.3857 -0.17581 2021 3 6 59279 0.0371 0.3872 -0.17610 2021 3 7 59280 0.0374 0.3887 -0.17621 2021 3 8 59281 0.0378 0.3902 -0.17620 2021 3 9 59282 0.0382 0.3917 -0.17619 2021 3 10 59283 0.0386 0.3932 -0.17625 2021 3 11 59284 0.0391 0.3947 -0.17645 2021 3 12 59285 0.0396 0.3961 -0.17680 2021 3 13 59286 0.0401 0.3976 -0.17730 2021 3 14 59287 0.0407 0.3991 -0.17790 2021 3 15 59288 0.0412 0.4005 -0.17854 2021 3 16 59289 0.0418 0.4020 -0.17916 2021 3 17 59290 0.0425 0.4034 -0.17971 2021 3 18 59291 0.0431 0.4048 -0.18014 2021 3 19 59292 0.0438 0.4062 -0.18044 2021 3 20 59293 0.0445 0.4077 -0.18060 2021 3 21 59294 0.0453 0.4091 -0.18064 2021 3 22 59295 0.0460 0.4104 -0.18061 2021 3 23 59296 0.0468 0.4118 -0.18057 2021 3 24 59297 0.0477 0.4132 -0.18061 2021 3 25 59298 0.0485 0.4146 -0.18080 2021 3 26 59299 0.0494 0.4159 -0.18123 2021 3 27 59300 0.0503 0.4172 -0.18194 2021 3 28 59301 0.0512 0.4186 -0.18292 2021 3 29 59302 0.0522 0.4199 -0.18407 2021 3 30 59303 0.0531 0.4212 -0.18526 2021 3 31 59304 0.0541 0.4224 -0.18632 2021 4 1 59305 0.0552 0.4237 -0.18715 2021 4 2 59306 0.0562 0.4250 -0.18771 2021 4 3 59307 0.0573 0.4262 -0.18802 2021 4 4 59308 0.0584 0.4274 -0.18817 2021 4 5 59309 0.0595 0.4286 -0.18827 2021 4 6 59310 0.0607 0.4298 -0.18841 2021 4 7 59311 0.0618 0.4310 -0.18866 2021 4 8 59312 0.0630 0.4321 -0.18904 2021 4 9 59313 0.0643 0.4333 -0.18957 2021 4 10 59314 0.0655 0.4344 -0.19019 2021 4 11 59315 0.0668 0.4355 -0.19086 2021 4 12 59316 0.0680 0.4366 -0.19153 2021 4 13 59317 0.0693 0.4376 -0.19213 2021 4 14 59318 0.0707 0.4387 -0.19261 2021 4 15 59319 0.0720 0.4397 -0.19295 2021 4 16 59320 0.0734 0.4407 -0.19313 2021 4 17 59321 0.0748 0.4417 -0.19317 2021 4 18 59322 0.0762 0.4427 -0.19311 2021 4 19 59323 0.0776 0.4436 -0.19300 2021 4 20 59324 0.0790 0.4445 -0.19292 2021 4 21 59325 0.0805 0.4454 -0.19294 2021 4 22 59326 0.0820 0.4463 -0.19315 2021 4 23 59327 0.0835 0.4472 -0.19361 2021 4 24 59328 0.0850 0.4480 -0.19435 2021 4 25 59329 0.0865 0.4488 -0.19531 2021 4 26 59330 0.0881 0.4496 -0.19638 2021 4 27 59331 0.0897 0.4504 -0.19741 2021 4 28 59332 0.0912 0.4511 -0.19824 2021 4 29 59333 0.0928 0.4518 -0.19879 2021 4 30 59334 0.0944 0.4525 -0.19905 2021 5 1 59335 0.0961 0.4532 -0.19909 2021 5 2 59336 0.0977 0.4538 -0.19902 2021 5 3 59337 0.0994 0.4545 -0.19896 2021 5 4 59338 0.1010 0.4551 -0.19897 2021 5 5 59339 0.1027 0.4556 -0.19909 2021 5 6 59340 0.1044 0.4562 -0.19933 2021 5 7 59341 0.1061 0.4567 -0.19966 2021 5 8 59342 0.1078 0.4572 -0.20003 2021 5 9 59343 0.1095 0.4577 -0.20038 2021 5 10 59344 0.1113 0.4581 -0.20066 2021 5 11 59345 0.1130 0.4585 -0.20081 2021 5 12 59346 0.1148 0.4589 -0.20080 2021 5 13 59347 0.1165 0.4593 -0.20061 2021 5 14 59348 0.1183 0.4596 -0.20023 2021 5 15 59349 0.1201 0.4599 -0.19970 2021 5 16 59350 0.1219 0.4602 -0.19908 2021 5 17 59351 0.1237 0.4604 -0.19842 2021 5 18 59352 0.1255 0.4607 -0.19780 2021 5 19 59353 0.1273 0.4609 -0.19730 2021 5 20 59354 0.1291 0.4610 -0.19700 2021 5 21 59355 0.1309 0.4612 -0.19694 2021 5 22 59356 0.1327 0.4613 -0.19715 2021 5 23 59357 0.1345 0.4614 -0.19756 2021 5 24 59358 0.1364 0.4614 -0.19807 2021 5 25 59359 0.1382 0.4615 -0.19854 2021 5 26 59360 0.1400 0.4615 -0.19884 2021 5 27 59361 0.1418 0.4615 -0.19893 2021 5 28 59362 0.1437 0.4614 -0.19882 2021 5 29 59363 0.1455 0.4613 -0.19860 2021 5 30 59364 0.1473 0.4612 -0.19838 2021 5 31 59365 0.1492 0.4611 -0.19825 2021 6 1 59366 0.1510 0.4609 -0.19825 2021 6 2 59367 0.1528 0.4607 -0.19836 2021 6 3 59368 0.1547 0.4605 -0.19857 2021 6 4 59369 0.1565 0.4602 -0.19880 2021 6 5 59370 0.1583 0.4600 -0.19901 2021 6 6 59371 0.1601 0.4597 -0.19913 2021 6 7 59372 0.1619 0.4593 -0.19911 2021 6 8 59373 0.1637 0.4590 -0.19891 2021 6 9 59374 0.1655 0.4586 -0.19851 2021 6 10 59375 0.1673 0.4582 -0.19792 2021 6 11 59376 0.1691 0.4577 -0.19716 2021 6 12 59377 0.1709 0.4572 -0.19628 2021 6 13 59378 0.1727 0.4567 -0.19536 2021 6 14 59379 0.1745 0.4562 -0.19447 2021 6 15 59380 0.1762 0.4556 -0.19366 2021 6 16 59381 0.1780 0.4551 -0.19298 2021 6 17 59382 0.1797 0.4545 -0.19248 2021 6 18 59383 0.1815 0.4538 -0.19215 2021 6 19 59384 0.1832 0.4531 -0.19196 2021 6 20 59385 0.1849 0.4525 -0.19184 2021 6 21 59386 0.1866 0.4517 -0.19165 2021 6 22 59387 0.1883 0.4510 -0.19131 2021 6 23 59388 0.1900 0.4502 -0.19076 2021 6 24 59389 0.1916 0.4494 -0.18999 2021 6 25 59390 0.1933 0.4486 -0.18904 2021 6 26 59391 0.1949 0.4477 -0.18798 2021 6 27 59392 0.1965 0.4469 -0.18698 2021 6 28 59393 0.1981 0.4460 -0.18620 2021 6 29 59394 0.1997 0.4451 -0.18566 2021 6 30 59395 0.2013 0.4441 -0.18533 2021 7 1 59396 0.2029 0.4431 -0.18511 2021 7 2 59397 0.2044 0.4421 -0.18492 2021 7 3 59398 0.2059 0.4411 -0.18471 2021 7 4 59399 0.2074 0.4401 -0.18436 2021 7 5 59400 0.2089 0.4390 -0.18387 2021 7 6 59401 0.2104 0.4379 -0.18317 2021 7 7 59402 0.2119 0.4368 -0.18229 2021 7 8 59403 0.2133 0.4356 -0.18124 2021 7 9 59404 0.2147 0.4345 -0.18004 2021 7 10 59405 0.2161 0.4333 -0.17875 2021 7 11 59406 0.2175 0.4321 -0.17747 2021 7 12 59407 0.2188 0.4309 -0.17626 2021 7 13 59408 0.2201 0.4296 -0.17516 2021 7 14 59409 0.2215 0.4283 -0.17423 2021 7 15 59410 0.2227 0.4270 -0.17350 2021 7 16 59411 0.2240 0.4257 -0.17291 2021 7 17 59412 0.2252 0.4244 -0.17239 2021 7 18 59413 0.2265 0.4230 -0.17187 2021 7 19 59414 0.2276 0.4217 -0.17125 2021 7 20 59415 0.2288 0.4203 -0.17047 2021 7 21 59416 0.2300 0.4189 -0.16944 2021 7 22 59417 0.2311 0.4175 -0.16827 2021 7 23 59418 0.2322 0.4160 -0.16709 2021 7 24 59419 0.2332 0.4146 -0.16598 2021 7 25 59420 0.2343 0.4131 -0.16505 2021 7 26 59421 0.2353 0.4116 -0.16436 2021 7 27 59422 0.2363 0.4101 -0.16386 2021 7 28 59423 0.2372 0.4085 -0.16347 2021 7 29 59424 0.2382 0.4070 -0.16316 2021 7 30 59425 0.2391 0.4055 -0.16285 2021 7 31 59426 0.2399 0.4039 -0.16245 2021 8 1 59427 0.2408 0.4023 -0.16199 2021 8 2 59428 0.2416 0.4007 -0.16142 2021 8 3 59429 0.2424 0.3991 -0.16068 2021 8 4 59430 0.2432 0.3975 -0.15980 2021 8 5 59431 0.2439 0.3958 -0.15888 2021 8 6 59432 0.2446 0.3942 -0.15797 2021 8 7 59433 0.2453 0.3925 -0.15707 2021 8 8 59434 0.2459 0.3908 -0.15626 2021 8 9 59435 0.2466 0.3892 -0.15562 2021 8 10 59436 0.2471 0.3875 -0.15518 2021 8 11 59437 0.2477 0.3858 -0.15497 2021 8 12 59438 0.2482 0.3841 -0.15495 2021 8 13 59439 0.2487 0.3823 -0.15503 2021 8 14 59440 0.2492 0.3806 -0.15509 2021 8 15 59441 0.2496 0.3789 -0.15505 2021 8 16 59442 0.2500 0.3771 -0.15485 2021 8 17 59443 0.2504 0.3754 -0.15447 2021 8 18 59444 0.2507 0.3736 -0.15395 2021 8 19 59445 0.2510 0.3719 -0.15332 2021 8 20 59446 0.2513 0.3701 -0.15260 2021 8 21 59447 0.2515 0.3683 -0.15188 2021 8 22 59448 0.2517 0.3666 -0.15130 2021 8 23 59449 0.2519 0.3648 -0.15089 2021 8 24 59450 0.2521 0.3630 -0.15061 2021 8 25 59451 0.2522 0.3612 -0.15043 2021 8 26 59452 0.2523 0.3594 -0.15025 2021 8 27 59453 0.2523 0.3576 -0.15000 2021 8 28 59454 0.2523 0.3559 -0.14970 2021 8 29 59455 0.2523 0.3541 -0.14932 2021 8 30 59456 0.2522 0.3523 -0.14885 2021 8 31 59457 0.2522 0.3505 -0.14826 2021 9 1 59458 0.2520 0.3487 -0.14755 2021 9 2 59459 0.2519 0.3469 -0.14676 2021 9 3 59460 0.2517 0.3451 -0.14600 2021 9 4 59461 0.2515 0.3433 -0.14540 2021 9 5 59462 0.2513 0.3416 -0.14501 2021 9 6 59463 0.2510 0.3398 -0.14487 2021 9 7 59464 0.2507 0.3380 -0.14503 2021 9 8 59465 0.2503 0.3362 -0.14547 2021 9 9 59466 0.2499 0.3345 -0.14609 2021 9 10 59467 0.2495 0.3327 -0.14681 2021 9 11 59468 0.2491 0.3310 -0.14751 2021 9 12 59469 0.2486 0.3292 -0.14811 2021 9 13 59470 0.2481 0.3275 -0.14852 2021 9 14 59471 0.2476 0.3257 -0.14874 2021 9 15 59472 0.2470 0.3240 -0.14884 2021 9 16 59473 0.2464 0.3223 -0.14892 2021 9 17 59474 0.2458 0.3206 -0.14906 2021 9 18 59475 0.2451 0.3189 -0.14939 2021 9 19 59476 0.2444 0.3172 -0.14993 2021 9 20 59477 0.2437 0.3155 -0.15071 2021 9 21 59478 0.2429 0.3139 -0.15162 2021 9 22 59479 0.2422 0.3122 -0.15256 2021 9 23 59480 0.2413 0.3106 -0.15342 2021 9 24 59481 0.2405 0.3089 -0.15411 2021 9 25 59482 0.2396 0.3073 -0.15451 2021 9 26 59483 0.2387 0.3057 -0.15467 2021 9 27 59484 0.2378 0.3041 -0.15462 2021 9 28 59485 0.2368 0.3025 -0.15441 2021 9 29 59486 0.2358 0.3010 -0.15409 2021 9 30 59487 0.2348 0.2994 -0.15370 2021 10 1 59488 0.2337 0.2979 -0.15332 2021 10 2 59489 0.2326 0.2964 -0.15306 2021 10 3 59490 0.2315 0.2949 -0.15305 2021 10 4 59491 0.2304 0.2934 -0.15334 2021 10 5 59492 0.2292 0.2919 -0.15394 2021 10 6 59493 0.2280 0.2905 -0.15488 2021 10 7 59494 0.2268 0.2890 -0.15601 2021 10 8 59495 0.2256 0.2876 -0.15708 2021 10 9 59496 0.2243 0.2862 -0.15801 2021 10 10 59497 0.2230 0.2848 -0.15873 2021 10 11 59498 0.2217 0.2835 -0.15922 2021 10 12 59499 0.2203 0.2822 -0.15952 2021 10 13 59500 0.2190 0.2808 -0.15973 2021 10 14 59501 0.2176 0.2795 -0.15998 2021 10 15 59502 0.2161 0.2783 -0.16035 2021 10 16 59503 0.2147 0.2770 -0.16088 2021 10 17 59504 0.2132 0.2758 -0.16156 2021 10 18 59505 0.2117 0.2746 -0.16235 2021 10 19 59506 0.2102 0.2734 -0.16318 2021 10 20 59507 0.2087 0.2723 -0.16396 2021 10 21 59508 0.2071 0.2711 -0.16460 2021 10 22 59509 0.2055 0.2700 -0.16504 2021 10 23 59510 0.2039 0.2689 -0.16530 2021 10 24 59511 0.2023 0.2679 -0.16534 2021 10 25 59512 0.2007 0.2668 -0.16515 2021 10 26 59513 0.1990 0.2658 -0.16487 2021 10 27 59514 0.1973 0.2648 -0.16457 2021 10 28 59515 0.1956 0.2639 -0.16433 2021 10 29 59516 0.1939 0.2629 -0.16420 2021 10 30 59517 0.1922 0.2620 -0.16422 2021 10 31 59518 0.1904 0.2611 -0.16446 2021 11 1 59519 0.1887 0.2603 -0.16496 2021 11 2 59520 0.1869 0.2594 -0.16576 2021 11 3 59521 0.1851 0.2586 -0.16679 2021 11 4 59522 0.1833 0.2579 -0.16785 2021 11 5 59523 0.1814 0.2571 -0.16876 2021 11 6 59524 0.1796 0.2564 -0.16942 2021 11 7 59525 0.1777 0.2557 -0.16982 2021 11 8 59526 0.1759 0.2551 -0.17003 2021 11 9 59527 0.1740 0.2544 -0.17013 2021 11 10 59528 0.1721 0.2538 -0.17021 2021 11 11 59529 0.1702 0.2533 -0.17036 2021 11 12 59530 0.1682 0.2527 -0.17069 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) 59146 -114.83 0.56 -8.61 0.15 59147 -114.76 0.50 -8.50 0.17 59148 -114.55 0.50 -8.35 0.17 59149 -114.24 0.47 -8.26 0.18 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 59146 0.138 0.224 -0.001 0.154 59147 0.157 0.198 -0.022 0.168 59148 0.175 0.198 -0.046 0.168 59149 0.193 0.186 -0.073 0.176 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).