********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 15 October 2020 Vol. XXXIII No. 042 ______________________________________________________________________ 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 9 59131 0.18585 .00009 0.31628 .00009 -0.170978 0.000020 20 10 10 59132 0.18451 .00009 0.31500 .00009 -0.170356 0.000016 20 10 11 59133 0.18299 .00009 0.31383 .00009 -0.169829 0.000014 20 10 12 59134 0.18144 .00009 0.31254 .00009 -0.169435 0.000013 20 10 13 59135 0.18014 .00009 0.31137 .00009 -0.169280 0.000010 20 10 14 59136 0.17910 .00009 0.31049 .00009 -0.169450 0.000010 20 10 15 59137 0.17826 .00009 0.30959 .00009 -0.169930 0.000010 IERS Final Values MJD x y UT1-UTC " " s 20 8 2 59063 0.2026 0.3941 -0.20705 20 8 3 59064 0.2039 0.3937 -0.20607 20 8 4 59065 0.2050 0.3933 -0.20522 20 8 5 59066 0.2061 0.3926 -0.20450 20 8 6 59067 0.2071 0.3917 -0.20390 20 8 7 59068 0.2080 0.3909 -0.20342 20 8 8 59069 0.2088 0.3895 -0.20306 20 8 9 59070 0.2099 0.3880 -0.20273 20 8 10 59071 0.2110 0.3867 -0.20234 20 8 11 59072 0.2120 0.3853 -0.20185 20 8 12 59073 0.2131 0.3839 -0.20121 20 8 13 59074 0.2144 0.3822 -0.20043 20 8 14 59075 0.2152 0.3805 -0.19951 20 8 15 59076 0.2157 0.3791 -0.19844 20 8 16 59077 0.2162 0.3779 -0.19729 20 8 17 59078 0.2168 0.3771 -0.19618 20 8 18 59079 0.2172 0.3764 -0.19515 20 8 19 59080 0.2171 0.3758 -0.19429 20 8 20 59081 0.2167 0.3749 -0.19369 20 8 21 59082 0.2168 0.3736 -0.19335 20 8 22 59083 0.2169 0.3718 -0.19322 20 8 23 59084 0.2176 0.3702 -0.19317 20 8 24 59085 0.2184 0.3686 -0.19304 20 8 25 59086 0.2188 0.3674 -0.19271 20 8 26 59087 0.2188 0.3660 -0.19212 20 8 27 59088 0.2185 0.3650 -0.19124 20 8 28 59089 0.2184 0.3637 -0.19014 20 8 29 59090 0.2182 0.3632 -0.18889 20 8 30 59091 0.2175 0.3623 -0.18761 20 8 31 59092 0.2168 0.3616 -0.18641 20 9 1 59093 0.2159 0.3606 -0.18534 _______________________________________________________________________ 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 = 0.1157 + 0.0532 cos A - 0.0608 sin A + 0.0116 cos C + 0.0041 sin C y = 0.3591 - 0.0573 cos A - 0.0497 sin A + 0.0041 cos C - 0.0116 sin C UT1-UTC = -0.1762 - 0.00003 (MJD - 59145) - (UT2-UT1) where A = 2*pi*(MJD-59137)/365.25 and C = 2*pi*(MJD-59137)/435. TAI-UTC(MJD 59138) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59137)**0.80 S t = 0.00025 (MJD-59137)**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 16 59138 0.1774 0.3087 -0.17063 2020 10 17 59139 0.1766 0.3078 -0.17143 2020 10 18 59140 0.1757 0.3070 -0.17216 2020 10 19 59141 0.1747 0.3061 -0.17267 2020 10 20 59142 0.1736 0.3053 -0.17293 2020 10 21 59143 0.1725 0.3045 -0.17297 2020 10 22 59144 0.1714 0.3037 -0.17288 2020 10 23 59145 0.1703 0.3029 -0.17274 2020 10 24 59146 0.1692 0.3021 -0.17263 2020 10 25 59147 0.1681 0.3013 -0.17258 2020 10 26 59148 0.1669 0.3006 -0.17262 2020 10 27 59149 0.1658 0.2998 -0.17275 2020 10 28 59150 0.1646 0.2992 -0.17293 2020 10 29 59151 0.1634 0.2985 -0.17313 2020 10 30 59152 0.1622 0.2978 -0.17332 2020 10 31 59153 0.1610 0.2972 -0.17346 2020 11 1 59154 0.1597 0.2966 -0.17350 2020 11 2 59155 0.1585 0.2960 -0.17342 2020 11 3 59156 0.1572 0.2954 -0.17319 2020 11 4 59157 0.1559 0.2949 -0.17280 2020 11 5 59158 0.1546 0.2943 -0.17232 2020 11 6 59159 0.1533 0.2938 -0.17180 2020 11 7 59160 0.1520 0.2934 -0.17133 2020 11 8 59161 0.1506 0.2929 -0.17099 2020 11 9 59162 0.1493 0.2924 -0.17084 2020 11 10 59163 0.1479 0.2920 -0.17095 2020 11 11 59164 0.1466 0.2916 -0.17133 2020 11 12 59165 0.1452 0.2913 -0.17194 2020 11 13 59166 0.1438 0.2909 -0.17268 2020 11 14 59167 0.1424 0.2906 -0.17340 2020 11 15 59168 0.1410 0.2903 -0.17393 2020 11 16 59169 0.1396 0.2900 -0.17420 2020 11 17 59170 0.1382 0.2897 -0.17417 2020 11 18 59171 0.1367 0.2895 -0.17393 2020 11 19 59172 0.1353 0.2893 -0.17355 2020 11 20 59173 0.1339 0.2891 -0.17316 2020 11 21 59174 0.1324 0.2889 -0.17284 2020 11 22 59175 0.1310 0.2888 -0.17262 2020 11 23 59176 0.1295 0.2886 -0.17254 2020 11 24 59177 0.1280 0.2885 -0.17255 2020 11 25 59178 0.1266 0.2885 -0.17263 2020 11 26 59179 0.1251 0.2884 -0.17274 2020 11 27 59180 0.1236 0.2884 -0.17282 2020 11 28 59181 0.1222 0.2884 -0.17285 2020 11 29 59182 0.1207 0.2884 -0.17277 2020 11 30 59183 0.1192 0.2885 -0.17258 2020 12 1 59184 0.1177 0.2885 -0.17227 2020 12 2 59185 0.1163 0.2886 -0.17187 2020 12 3 59186 0.1148 0.2887 -0.17140 2020 12 4 59187 0.1133 0.2889 -0.17095 2020 12 5 59188 0.1118 0.2890 -0.17057 2020 12 6 59189 0.1103 0.2892 -0.17034 2020 12 7 59190 0.1089 0.2894 -0.17031 2020 12 8 59191 0.1074 0.2897 -0.17050 2020 12 9 59192 0.1059 0.2899 -0.17092 2020 12 10 59193 0.1045 0.2902 -0.17147 2020 12 11 59194 0.1030 0.2905 -0.17206 2020 12 12 59195 0.1016 0.2909 -0.17254 2020 12 13 59196 0.1001 0.2912 -0.17280 2020 12 14 59197 0.0987 0.2916 -0.17280 2020 12 15 59198 0.0972 0.2920 -0.17257 2020 12 16 59199 0.0958 0.2924 -0.17219 2020 12 17 59200 0.0944 0.2929 -0.17177 2020 12 18 59201 0.0929 0.2934 -0.17139 2020 12 19 59202 0.0915 0.2939 -0.17112 2020 12 20 59203 0.0901 0.2944 -0.17098 2020 12 21 59204 0.0887 0.2949 -0.17094 2020 12 22 59205 0.0873 0.2955 -0.17098 2020 12 23 59206 0.0860 0.2961 -0.17105 2020 12 24 59207 0.0846 0.2967 -0.17109 2020 12 25 59208 0.0832 0.2973 -0.17107 2020 12 26 59209 0.0819 0.2980 -0.17095 2020 12 27 59210 0.0806 0.2987 -0.17070 2020 12 28 59211 0.0792 0.2994 -0.17032 2020 12 29 59212 0.0779 0.3001 -0.16981 2020 12 30 59213 0.0766 0.3009 -0.16923 2020 12 31 59214 0.0754 0.3016 -0.16864 2021 1 1 59215 0.0741 0.3024 -0.16811 2021 1 2 59216 0.0728 0.3032 -0.16773 2021 1 3 59217 0.0716 0.3040 -0.16756 2021 1 4 59218 0.0704 0.3049 -0.16762 2021 1 5 59219 0.0691 0.3058 -0.16790 2021 1 6 59220 0.0680 0.3067 -0.16833 2021 1 7 59221 0.0668 0.3076 -0.16882 2021 1 8 59222 0.0656 0.3085 -0.16927 2021 1 9 59223 0.0645 0.3095 -0.16956 2021 1 10 59224 0.0633 0.3104 -0.16964 2021 1 11 59225 0.0622 0.3114 -0.16952 2021 1 12 59226 0.0611 0.3124 -0.16925 2021 1 13 59227 0.0601 0.3134 -0.16892 2021 1 14 59228 0.0590 0.3145 -0.16863 2021 1 15 59229 0.0580 0.3155 -0.16847 2021 1 16 59230 0.0570 0.3166 -0.16844 2021 1 17 59231 0.0560 0.3177 -0.16855 2021 1 18 59232 0.0550 0.3188 -0.16877 2021 1 19 59233 0.0540 0.3200 -0.16903 2021 1 20 59234 0.0531 0.3211 -0.16930 2021 1 21 59235 0.0522 0.3223 -0.16951 2021 1 22 59236 0.0513 0.3234 -0.16963 2021 1 23 59237 0.0504 0.3246 -0.16963 2021 1 24 59238 0.0496 0.3258 -0.16950 2021 1 25 59239 0.0488 0.3271 -0.16924 2021 1 26 59240 0.0480 0.3283 -0.16890 2021 1 27 59241 0.0472 0.3295 -0.16854 2021 1 28 59242 0.0464 0.3308 -0.16822 2021 1 29 59243 0.0457 0.3321 -0.16804 2021 1 30 59244 0.0450 0.3334 -0.16807 2021 1 31 59245 0.0443 0.3347 -0.16835 2021 2 1 59246 0.0437 0.3360 -0.16876 2021 2 2 59247 0.0430 0.3373 -0.16933 2021 2 3 59248 0.0424 0.3387 -0.16996 2021 2 4 59249 0.0418 0.3400 -0.17053 2021 2 5 59250 0.0413 0.3414 -0.17096 2021 2 6 59251 0.0408 0.3427 -0.17118 2021 2 7 59252 0.0403 0.3441 -0.17119 2021 2 8 59253 0.0398 0.3455 -0.17104 2021 2 9 59254 0.0393 0.3469 -0.17081 2021 2 10 59255 0.0389 0.3483 -0.17060 2021 2 11 59256 0.0385 0.3497 -0.17049 2021 2 12 59257 0.0381 0.3511 -0.17052 2021 2 13 59258 0.0378 0.3525 -0.17072 2021 2 14 59259 0.0375 0.3540 -0.17105 2021 2 15 59260 0.0372 0.3554 -0.17145 2021 2 16 59261 0.0369 0.3569 -0.17188 2021 2 17 59262 0.0367 0.3583 -0.17228 2021 2 18 59263 0.0365 0.3598 -0.17260 2021 2 19 59264 0.0363 0.3612 -0.17280 2021 2 20 59265 0.0362 0.3627 -0.17288 2021 2 21 59266 0.0360 0.3641 -0.17284 2021 2 22 59267 0.0360 0.3656 -0.17271 2021 2 23 59268 0.0359 0.3671 -0.17253 2021 2 24 59269 0.0359 0.3686 -0.17239 2021 2 25 59270 0.0358 0.3700 -0.17236 2021 2 26 59271 0.0359 0.3715 -0.17252 2021 2 27 59272 0.0359 0.3730 -0.17296 2021 2 28 59273 0.0360 0.3745 -0.17366 2021 3 1 59274 0.0361 0.3760 -0.17458 2021 3 2 59275 0.0362 0.3774 -0.17561 2021 3 3 59276 0.0364 0.3789 -0.17661 2021 3 4 59277 0.0366 0.3804 -0.17746 2021 3 5 59278 0.0368 0.3819 -0.17808 2021 3 6 59279 0.0371 0.3833 -0.17848 2021 3 7 59280 0.0374 0.3848 -0.17868 2021 3 8 59281 0.0377 0.3863 -0.17877 2021 3 9 59282 0.0380 0.3877 -0.17886 2021 3 10 59283 0.0384 0.3892 -0.17903 2021 3 11 59284 0.0388 0.3907 -0.17933 2021 3 12 59285 0.0392 0.3921 -0.17980 2021 3 13 59286 0.0396 0.3935 -0.18040 2021 3 14 59287 0.0401 0.3950 -0.18111 2021 3 15 59288 0.0406 0.3964 -0.18187 2021 3 16 59289 0.0412 0.3978 -0.18261 2021 3 17 59290 0.0417 0.3993 -0.18328 2021 3 18 59291 0.0423 0.4007 -0.18383 2021 3 19 59292 0.0429 0.4021 -0.18425 2021 3 20 59293 0.0436 0.4035 -0.18453 2021 3 21 59294 0.0443 0.4049 -0.18470 2021 3 22 59295 0.0450 0.4062 -0.18480 2021 3 23 59296 0.0457 0.4076 -0.18489 2021 3 24 59297 0.0465 0.4090 -0.18504 2021 3 25 59298 0.0472 0.4103 -0.18536 2021 3 26 59299 0.0480 0.4116 -0.18591 2021 3 27 59300 0.0489 0.4130 -0.18675 2021 3 28 59301 0.0497 0.4143 -0.18786 2021 3 29 59302 0.0506 0.4156 -0.18914 2021 3 30 59303 0.0515 0.4169 -0.19045 2021 3 31 59304 0.0525 0.4181 -0.19165 2021 4 1 59305 0.0535 0.4194 -0.19261 2021 4 2 59306 0.0544 0.4206 -0.19329 2021 4 3 59307 0.0555 0.4219 -0.19373 2021 4 4 59308 0.0565 0.4231 -0.19402 2021 4 5 59309 0.0576 0.4243 -0.19424 2021 4 6 59310 0.0587 0.4255 -0.19451 2021 4 7 59311 0.0598 0.4266 -0.19489 2021 4 8 59312 0.0609 0.4278 -0.19540 2021 4 9 59313 0.0621 0.4289 -0.19604 2021 4 10 59314 0.0632 0.4301 -0.19679 2021 4 11 59315 0.0645 0.4312 -0.19758 2021 4 12 59316 0.0657 0.4322 -0.19835 2021 4 13 59317 0.0669 0.4333 -0.19905 2021 4 14 59318 0.0682 0.4344 -0.19963 2021 4 15 59319 0.0695 0.4354 -0.20004 2021 4 16 59320 0.0708 0.4364 -0.20029 2021 4 17 59321 0.0721 0.4374 -0.20038 2021 4 18 59322 0.0735 0.4384 -0.20036 2021 4 19 59323 0.0749 0.4393 -0.20028 2021 4 20 59324 0.0763 0.4402 -0.20023 2021 4 21 59325 0.0777 0.4412 -0.20029 2021 4 22 59326 0.0791 0.4420 -0.20055 2021 4 23 59327 0.0805 0.4429 -0.20110 2021 4 24 59328 0.0820 0.4438 -0.20197 2021 4 25 59329 0.0835 0.4446 -0.20312 2021 4 26 59330 0.0850 0.4454 -0.20442 2021 4 27 59331 0.0865 0.4462 -0.20571 2021 4 28 59332 0.0881 0.4469 -0.20681 2021 4 29 59333 0.0896 0.4476 -0.20762 2021 4 30 59334 0.0912 0.4484 -0.20811 2021 5 1 59335 0.0927 0.4490 -0.20834 2021 5 2 59336 0.0943 0.4497 -0.20843 2021 5 3 59337 0.0960 0.4503 -0.20849 2021 5 4 59338 0.0976 0.4510 -0.20860 2021 5 5 59339 0.0992 0.4516 -0.20883 2021 5 6 59340 0.1009 0.4521 -0.20918 2021 5 7 59341 0.1025 0.4527 -0.20964 2021 5 8 59342 0.1042 0.4532 -0.21018 2021 5 9 59343 0.1059 0.4537 -0.21075 2021 5 10 59344 0.1076 0.4541 -0.21129 2021 5 11 59345 0.1093 0.4546 -0.21174 2021 5 12 59346 0.1110 0.4550 -0.21203 2021 5 13 59347 0.1127 0.4554 -0.21214 2021 5 14 59348 0.1144 0.4557 -0.21205 2021 5 15 59349 0.1162 0.4561 -0.21177 2021 5 16 59350 0.1179 0.4564 -0.21137 2021 5 17 59351 0.1197 0.4566 -0.21091 2021 5 18 59352 0.1215 0.4569 -0.21045 2021 5 19 59353 0.1232 0.4571 -0.21009 2021 5 20 59354 0.1250 0.4573 -0.20988 2021 5 21 59355 0.1268 0.4575 -0.20989 2021 5 22 59356 0.1286 0.4576 -0.21011 2021 5 23 59357 0.1304 0.4578 -0.21048 2021 5 24 59358 0.1322 0.4579 -0.21091 2021 5 25 59359 0.1340 0.4579 -0.21124 2021 5 26 59360 0.1358 0.4580 -0.21134 2021 5 27 59361 0.1376 0.4580 -0.21118 2021 5 28 59362 0.1394 0.4580 -0.21084 2021 5 29 59363 0.1412 0.4579 -0.21040 2021 5 30 59364 0.1430 0.4578 -0.20996 2021 5 31 59365 0.1448 0.4577 -0.20966 2021 6 1 59366 0.1466 0.4576 -0.20949 2021 6 2 59367 0.1484 0.4574 -0.20944 2021 6 3 59368 0.1502 0.4573 -0.20951 2021 6 4 59369 0.1520 0.4571 -0.20963 2021 6 5 59370 0.1538 0.4568 -0.20974 2021 6 6 59371 0.1556 0.4565 -0.20985 2021 6 7 59372 0.1574 0.4563 -0.20989 2021 6 8 59373 0.1592 0.4559 -0.20975 2021 6 9 59374 0.1610 0.4556 -0.20944 2021 6 10 59375 0.1628 0.4552 -0.20902 2021 6 11 59376 0.1645 0.4548 -0.20850 2021 6 12 59377 0.1663 0.4544 -0.20786 2021 6 13 59378 0.1681 0.4539 -0.20717 2021 6 14 59379 0.1698 0.4534 -0.20651 2021 6 15 59380 0.1716 0.4529 -0.20593 2021 6 16 59381 0.1733 0.4524 -0.20551 2021 6 17 59382 0.1750 0.4518 -0.20529 2021 6 18 59383 0.1767 0.4512 -0.20527 2021 6 19 59384 0.1785 0.4506 -0.20540 2021 6 20 59385 0.1802 0.4500 -0.20561 2021 6 21 59386 0.1818 0.4493 -0.20578 2021 6 22 59387 0.1835 0.4486 -0.20583 2021 6 23 59388 0.1852 0.4479 -0.20566 2021 6 24 59389 0.1868 0.4471 -0.20523 2021 6 25 59390 0.1885 0.4463 -0.20452 2021 6 26 59391 0.1901 0.4455 -0.20361 2021 6 27 59392 0.1917 0.4447 -0.20271 2021 6 28 59393 0.1933 0.4439 -0.20191 2021 6 29 59394 0.1949 0.4430 -0.20122 2021 6 30 59395 0.1965 0.4421 -0.20064 2021 7 1 59396 0.1980 0.4412 -0.20012 2021 7 2 59397 0.1996 0.4402 -0.19959 2021 7 3 59398 0.2011 0.4392 -0.19906 2021 7 4 59399 0.2026 0.4382 -0.19850 2021 7 5 59400 0.2041 0.4372 -0.19786 2021 7 6 59401 0.2055 0.4362 -0.19707 2021 7 7 59402 0.2070 0.4351 -0.19610 2021 7 8 59403 0.2084 0.4340 -0.19497 2021 7 9 59404 0.2098 0.4329 -0.19375 2021 7 10 59405 0.2112 0.4318 -0.19255 2021 7 11 59406 0.2126 0.4306 -0.19144 2021 7 12 59407 0.2140 0.4295 -0.19044 2021 7 13 59408 0.2153 0.4283 -0.18964 2021 7 14 59409 0.2166 0.4270 -0.18911 2021 7 15 59410 0.2179 0.4258 -0.18880 2021 7 16 59411 0.2191 0.4245 -0.18873 2021 7 17 59412 0.2204 0.4233 -0.18882 2021 7 18 59413 0.2216 0.4220 -0.18898 2021 7 19 59414 0.2228 0.4207 -0.18907 2021 7 20 59415 0.2240 0.4193 -0.18896 2021 7 21 59416 0.2251 0.4180 -0.18864 2021 7 22 59417 0.2262 0.4166 -0.18812 2021 7 23 59418 0.2273 0.4152 -0.18750 2021 7 24 59419 0.2284 0.4138 -0.18692 2021 7 25 59420 0.2295 0.4124 -0.18648 2021 7 26 59421 0.2305 0.4110 -0.18626 2021 7 27 59422 0.2315 0.4095 -0.18621 2021 7 28 59423 0.2325 0.4080 -0.18625 2021 7 29 59424 0.2334 0.4065 -0.18628 2021 7 30 59425 0.2343 0.4050 -0.18620 2021 7 31 59426 0.2352 0.4035 -0.18590 2021 8 1 59427 0.2361 0.4020 -0.18540 2021 8 2 59428 0.2369 0.4005 -0.18469 2021 8 3 59429 0.2377 0.3989 -0.18378 2021 8 4 59430 0.2385 0.3973 -0.18271 2021 8 5 59431 0.2392 0.3957 -0.18149 2021 8 6 59432 0.2399 0.3942 -0.18017 2021 8 7 59433 0.2406 0.3926 -0.17887 2021 8 8 59434 0.2413 0.3909 -0.17772 2021 8 9 59435 0.2419 0.3893 -0.17678 2021 8 10 59436 0.2425 0.3877 -0.17612 2021 8 11 59437 0.2431 0.3860 -0.17583 2021 8 12 59438 0.2436 0.3844 -0.17582 2021 8 13 59439 0.2441 0.3827 -0.17591 2021 8 14 59440 0.2446 0.3810 -0.17604 2021 8 15 59441 0.2450 0.3794 -0.17611 2021 8 16 59442 0.2455 0.3777 -0.17601 2021 8 17 59443 0.2458 0.3760 -0.17570 2021 8 18 59444 0.2462 0.3743 -0.17519 2021 8 19 59445 0.2465 0.3726 -0.17456 2021 8 20 59446 0.2468 0.3709 -0.17394 2021 8 21 59447 0.2471 0.3692 -0.17341 2021 8 22 59448 0.2473 0.3674 -0.17302 2021 8 23 59449 0.2475 0.3657 -0.17281 2021 8 24 59450 0.2476 0.3640 -0.17274 2021 8 25 59451 0.2478 0.3622 -0.17271 2021 8 26 59452 0.2479 0.3605 -0.17263 2021 8 27 59453 0.2479 0.3588 -0.17244 2021 8 28 59454 0.2480 0.3570 -0.17213 2021 8 29 59455 0.2480 0.3553 -0.17163 2021 8 30 59456 0.2479 0.3536 -0.17090 2021 8 31 59457 0.2479 0.3518 -0.17005 2021 9 1 59458 0.2478 0.3501 -0.16913 2021 9 2 59459 0.2476 0.3484 -0.16819 2021 9 3 59460 0.2475 0.3466 -0.16728 2021 9 4 59461 0.2473 0.3449 -0.16645 2021 9 5 59462 0.2470 0.3432 -0.16580 2021 9 6 59463 0.2468 0.3414 -0.16538 2021 9 7 59464 0.2465 0.3397 -0.16530 2021 9 8 59465 0.2462 0.3380 -0.16552 2021 9 9 59466 0.2458 0.3363 -0.16590 2021 9 10 59467 0.2454 0.3346 -0.16629 2021 9 11 59468 0.2450 0.3329 -0.16658 2021 9 12 59469 0.2445 0.3312 -0.16670 2021 9 13 59470 0.2441 0.3295 -0.16664 2021 9 14 59471 0.2435 0.3278 -0.16640 2021 9 15 59472 0.2430 0.3261 -0.16603 2021 9 16 59473 0.2424 0.3244 -0.16560 2021 9 17 59474 0.2418 0.3228 -0.16527 2021 9 18 59475 0.2411 0.3211 -0.16508 2021 9 19 59476 0.2405 0.3195 -0.16501 2021 9 20 59477 0.2398 0.3179 -0.16507 2021 9 21 59478 0.2390 0.3162 -0.16528 2021 9 22 59479 0.2383 0.3146 -0.16560 2021 9 23 59480 0.2375 0.3130 -0.16587 2021 9 24 59481 0.2366 0.3114 -0.16606 2021 9 25 59482 0.2358 0.3099 -0.16614 2021 9 26 59483 0.2349 0.3083 -0.16606 2021 9 27 59484 0.2340 0.3068 -0.16576 2021 9 28 59485 0.2330 0.3052 -0.16536 2021 9 29 59486 0.2320 0.3037 -0.16491 2021 9 30 59487 0.2310 0.3022 -0.16453 2021 10 1 59488 0.2300 0.3007 -0.16431 2021 10 2 59489 0.2289 0.2992 -0.16423 2021 10 3 59490 0.2279 0.2978 -0.16437 2021 10 4 59491 0.2267 0.2963 -0.16475 2021 10 5 59492 0.2256 0.2949 -0.16541 2021 10 6 59493 0.2244 0.2935 -0.16631 2021 10 7 59494 0.2232 0.2921 -0.16730 2021 10 8 59495 0.2220 0.2907 -0.16821 2021 10 9 59496 0.2207 0.2894 -0.16888 2021 10 10 59497 0.2194 0.2880 -0.16926 2021 10 11 59498 0.2181 0.2867 -0.16934 2021 10 12 59499 0.2168 0.2854 -0.16924 2021 10 13 59500 0.2155 0.2841 -0.16910 2021 10 14 59501 0.2141 0.2829 -0.16895 2021 10 15 59502 0.2127 0.2816 -0.16890 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) 59115 -117.95 0.05 -9.60 0.04 59116 -117.94 0.05 -9.60 0.04 59117 -117.96 0.05 -9.65 0.04 59118 -117.96 0.05 -9.66 0.04 59119 -117.82 0.19 -9.65 0.09 59120 -117.50 0.19 -9.63 0.09 59121 -117.13 0.20 -9.58 0.09 59122 -116.84 0.29 -9.38 0.08 59123 -116.65 0.29 -9.04 0.08 59124 -116.49 0.29 -8.74 0.08 IERS Celestial Pole Offset Final Series MJD dpsi deps (msec. of arc) 59063 -116.3 -10.1 59064 -116.0 -10.3 59065 -115.8 -10.4 59066 -115.8 -10.4 59067 -115.9 -10.3 59068 -116.1 -10.1 59069 -116.4 -10.1 59070 -116.5 -10.1 59071 -116.4 -10.1 59072 -116.4 -10.0 59073 -116.7 -9.9 59074 -117.3 -9.9 59075 -117.9 -10.0 59076 -118.0 -10.2 59077 -117.7 -10.5 59078 -117.4 -10.6 59079 -117.1 -10.6 59080 -116.9 -10.5 59081 -116.6 -10.2 59082 -116.5 -10.0 59083 -116.9 -10.1 59084 -117.5 -10.3 59085 -117.9 -10.4 59086 -118.2 -10.4 59087 -118.2 -10.3 59088 -118.2 -10.2 59089 -118.2 -10.1 59090 -118.2 -10.1 59091 -118.0 -10.2 59092 -117.7 -10.3 59093 -117.5 -10.4 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 59115 -0.018 0.019 -0.051 0.042 59116 -0.019 0.019 -0.046 0.042 59117 -0.014 0.019 -0.041 0.042 59118 -0.004 0.019 -0.036 0.042 59119 0.011 0.076 -0.030 0.087 59120 0.032 0.076 -0.025 0.087 59121 0.057 0.080 -0.021 0.092 59122 0.088 0.115 -0.017 0.077 59123 0.122 0.115 -0.014 0.077 59124 0.159 0.115 -0.011 0.077 IAU2000A Celestial Pole Offset Final Series MJD dX dY (msec. of arc) 59063 -0.02 0.05 59064 0.01 0.03 59065 0.05 -0.01 59066 0.07 -0.04 59067 0.10 -0.01 59068 0.13 -0.01 59069 0.14 -0.03 59070 0.15 -0.06 59071 0.16 -0.09 59072 0.16 -0.12 59073 0.17 -0.14 59074 0.15 -0.12 59075 0.14 -0.09 59076 0.13 -0.09 59077 0.13 -0.11 59078 0.13 -0.13 59079 0.13 -0.14 59080 0.12 -0.16 59081 0.18 -0.13 59082 0.24 -0.09 59083 0.22 -0.08 59084 0.16 -0.08 59085 0.10 -0.08 59086 0.05 -0.08 59087 0.07 -0.07 59088 0.10 -0.05 59089 0.14 -0.04 59090 0.15 -0.04 59091 0.16 -0.04 59092 0.17 -0.04 59093 0.17 -0.04 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).