********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 17 September 2020 Vol. XXXIII No. 038 ______________________________________________________________________ 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 11 59103 0.21076 .00009 0.34831 .00009 -0.178349 0.000012 20 9 12 59104 0.21022 .00009 0.34755 .00009 -0.177536 0.000011 20 9 13 59105 0.20941 .00009 0.34648 .00009 -0.176745 0.000010 20 9 14 59106 0.20866 .00009 0.34542 .00009 -0.176113 0.000010 20 9 15 59107 0.20808 .00009 0.34416 .00009 -0.175717 0.000011 20 9 16 59108 0.20781 .00009 0.34279 .00009 -0.175563 0.000065 20 9 17 59109 0.20771 .00009 0.34152 .00009 -0.175662 0.000055 _______________________________________________________________________ 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 = 0.1198 + 0.0791 cos A - 0.0235 sin A + 0.0087 cos C + 0.0020 sin C y = 0.3616 - 0.0231 cos A - 0.0743 sin A + 0.0020 cos C - 0.0087 sin C UT1-UTC = -0.1927 - 0.00006 (MJD - 59117) - (UT2-UT1) where A = 2*pi*(MJD-59109)/365.25 and C = 2*pi*(MJD-59109)/435. TAI-UTC(MJD 59110) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59109)**0.80 S t = 0.00025 (MJD-59109)**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 9 18 59110 0.2076 0.3404 -0.17600 2020 9 19 59111 0.2074 0.3392 -0.17650 2020 9 20 59112 0.2071 0.3380 -0.17698 2020 9 21 59113 0.2066 0.3368 -0.17731 2020 9 22 59114 0.2061 0.3356 -0.17740 2020 9 23 59115 0.2056 0.3344 -0.17726 2020 9 24 59116 0.2051 0.3331 -0.17694 2020 9 25 59117 0.2046 0.3318 -0.17652 2020 9 26 59118 0.2041 0.3305 -0.17608 2020 9 27 59119 0.2036 0.3293 -0.17572 2020 9 28 59120 0.2030 0.3280 -0.17545 2020 9 29 59121 0.2024 0.3268 -0.17530 2020 9 30 59122 0.2018 0.3256 -0.17526 2020 10 1 59123 0.2011 0.3244 -0.17533 2020 10 2 59124 0.2004 0.3232 -0.17545 2020 10 3 59125 0.1997 0.3219 -0.17557 2020 10 4 59126 0.1990 0.3207 -0.17562 2020 10 5 59127 0.1982 0.3195 -0.17555 2020 10 6 59128 0.1974 0.3183 -0.17535 2020 10 7 59129 0.1966 0.3172 -0.17501 2020 10 8 59130 0.1958 0.3160 -0.17453 2020 10 9 59131 0.1949 0.3149 -0.17397 2020 10 10 59132 0.1940 0.3137 -0.17340 2020 10 11 59133 0.1931 0.3126 -0.17291 2020 10 12 59134 0.1922 0.3115 -0.17259 2020 10 13 59135 0.1912 0.3104 -0.17253 2020 10 14 59136 0.1902 0.3093 -0.17276 2020 10 15 59137 0.1892 0.3082 -0.17328 2020 10 16 59138 0.1882 0.3072 -0.17401 2020 10 17 59139 0.1872 0.3061 -0.17481 2020 10 18 59140 0.1861 0.3051 -0.17553 2020 10 19 59141 0.1850 0.3041 -0.17605 2020 10 20 59142 0.1839 0.3031 -0.17632 2020 10 21 59143 0.1827 0.3022 -0.17638 2020 10 22 59144 0.1816 0.3012 -0.17630 2020 10 23 59145 0.1804 0.3003 -0.17618 2020 10 24 59146 0.1792 0.2994 -0.17609 2020 10 25 59147 0.1780 0.2985 -0.17609 2020 10 26 59148 0.1768 0.2976 -0.17621 2020 10 27 59149 0.1755 0.2968 -0.17644 2020 10 28 59150 0.1742 0.2959 -0.17676 2020 10 29 59151 0.1729 0.2951 -0.17715 2020 10 30 59152 0.1716 0.2943 -0.17755 2020 10 31 59153 0.1703 0.2936 -0.17790 2020 11 1 59154 0.1690 0.2928 -0.17816 2020 11 2 59155 0.1676 0.2921 -0.17830 2020 11 3 59156 0.1662 0.2914 -0.17829 2020 11 4 59157 0.1649 0.2907 -0.17815 2020 11 5 59158 0.1635 0.2900 -0.17791 2020 11 6 59159 0.1620 0.2894 -0.17762 2020 11 7 59160 0.1606 0.2888 -0.17736 2020 11 8 59161 0.1592 0.2882 -0.17720 2020 11 9 59162 0.1577 0.2876 -0.17723 2020 11 10 59163 0.1562 0.2871 -0.17750 2020 11 11 59164 0.1548 0.2865 -0.17804 2020 11 12 59165 0.1533 0.2860 -0.17881 2020 11 13 59166 0.1518 0.2856 -0.17969 2020 11 14 59167 0.1503 0.2851 -0.18055 2020 11 15 59168 0.1487 0.2847 -0.18124 2020 11 16 59169 0.1472 0.2843 -0.18167 2020 11 17 59170 0.1457 0.2839 -0.18183 2020 11 18 59171 0.1441 0.2835 -0.18178 2020 11 19 59172 0.1426 0.2832 -0.18163 2020 11 20 59173 0.1410 0.2829 -0.18148 2020 11 21 59174 0.1394 0.2826 -0.18141 2020 11 22 59175 0.1378 0.2824 -0.18146 2020 11 23 59176 0.1363 0.2821 -0.18163 2020 11 24 59177 0.1347 0.2819 -0.18191 2020 11 25 59178 0.1331 0.2818 -0.18226 2020 11 26 59179 0.1315 0.2816 -0.18264 2020 11 27 59180 0.1299 0.2815 -0.18301 2020 11 28 59181 0.1283 0.2814 -0.18331 2020 11 29 59182 0.1266 0.2813 -0.18350 2020 11 30 59183 0.1250 0.2813 -0.18357 2020 12 1 59184 0.1234 0.2812 -0.18350 2020 12 2 59185 0.1218 0.2812 -0.18333 2020 12 3 59186 0.1202 0.2813 -0.18309 2020 12 4 59187 0.1186 0.2813 -0.18285 2020 12 5 59188 0.1170 0.2814 -0.18270 2020 12 6 59189 0.1153 0.2815 -0.18268 2020 12 7 59190 0.1137 0.2816 -0.18288 2020 12 8 59191 0.1121 0.2818 -0.18331 2020 12 9 59192 0.1105 0.2820 -0.18396 2020 12 10 59193 0.1089 0.2822 -0.18475 2020 12 11 59194 0.1073 0.2824 -0.18557 2020 12 12 59195 0.1057 0.2827 -0.18628 2020 12 13 59196 0.1041 0.2830 -0.18679 2020 12 14 59197 0.1025 0.2833 -0.18703 2020 12 15 59198 0.1009 0.2836 -0.18704 2020 12 16 59199 0.0994 0.2840 -0.18691 2020 12 17 59200 0.0978 0.2844 -0.18673 2020 12 18 59201 0.0962 0.2848 -0.18661 2020 12 19 59202 0.0947 0.2852 -0.18660 2020 12 20 59203 0.0931 0.2857 -0.18671 2020 12 21 59204 0.0916 0.2862 -0.18693 2020 12 22 59205 0.0900 0.2867 -0.18722 2020 12 23 59206 0.0885 0.2873 -0.18755 2020 12 24 59207 0.0870 0.2878 -0.18784 2020 12 25 59208 0.0855 0.2884 -0.18807 2020 12 26 59209 0.0840 0.2890 -0.18818 2020 12 27 59210 0.0825 0.2897 -0.18816 2020 12 28 59211 0.0811 0.2903 -0.18800 2020 12 29 59212 0.0796 0.2910 -0.18772 2020 12 30 59213 0.0782 0.2917 -0.18735 2020 12 31 59214 0.0768 0.2925 -0.18697 2021 1 1 59215 0.0753 0.2932 -0.18665 2021 1 2 59216 0.0739 0.2940 -0.18647 2021 1 3 59217 0.0726 0.2948 -0.18649 2021 1 4 59218 0.0712 0.2957 -0.18665 2021 1 5 59219 0.0698 0.2965 -0.18702 2021 1 6 59220 0.0685 0.2974 -0.18754 2021 1 7 59221 0.0672 0.2983 -0.18811 2021 1 8 59222 0.0659 0.2992 -0.18861 2021 1 9 59223 0.0646 0.3001 -0.18896 2021 1 10 59224 0.0633 0.3011 -0.18910 2021 1 11 59225 0.0621 0.3021 -0.18901 2021 1 12 59226 0.0608 0.3031 -0.18877 2021 1 13 59227 0.0596 0.3041 -0.18847 2021 1 14 59228 0.0584 0.3051 -0.18821 2021 1 15 59229 0.0573 0.3062 -0.18805 2021 1 16 59230 0.0561 0.3072 -0.18804 2021 1 17 59231 0.0550 0.3083 -0.18816 2021 1 18 59232 0.0539 0.3095 -0.18838 2021 1 19 59233 0.0528 0.3106 -0.18866 2021 1 20 59234 0.0517 0.3117 -0.18893 2021 1 21 59235 0.0507 0.3129 -0.18916 2021 1 22 59236 0.0496 0.3141 -0.18930 2021 1 23 59237 0.0487 0.3153 -0.18931 2021 1 24 59238 0.0477 0.3165 -0.18920 2021 1 25 59239 0.0467 0.3178 -0.18898 2021 1 26 59240 0.0458 0.3190 -0.18867 2021 1 27 59241 0.0449 0.3203 -0.18833 2021 1 28 59242 0.0440 0.3216 -0.18805 2021 1 29 59243 0.0432 0.3229 -0.18790 2021 1 30 59244 0.0423 0.3242 -0.18795 2021 1 31 59245 0.0415 0.3255 -0.18826 2021 2 1 59246 0.0408 0.3269 -0.18880 2021 2 2 59247 0.0400 0.3282 -0.18950 2021 2 3 59248 0.0393 0.3296 -0.19027 2021 2 4 59249 0.0386 0.3310 -0.19099 2021 2 5 59250 0.0379 0.3324 -0.19155 2021 2 6 59251 0.0373 0.3338 -0.19191 2021 2 7 59252 0.0366 0.3352 -0.19206 2021 2 8 59253 0.0361 0.3366 -0.19205 2021 2 9 59254 0.0355 0.3380 -0.19196 2021 2 10 59255 0.0350 0.3395 -0.19190 2021 2 11 59256 0.0345 0.3409 -0.19193 2021 2 12 59257 0.0340 0.3424 -0.19212 2021 2 13 59258 0.0335 0.3439 -0.19247 2021 2 14 59259 0.0331 0.3454 -0.19295 2021 2 15 59260 0.0327 0.3468 -0.19351 2021 2 16 59261 0.0324 0.3483 -0.19410 2021 2 17 59262 0.0320 0.3498 -0.19465 2021 2 18 59263 0.0317 0.3513 -0.19513 2021 2 19 59264 0.0315 0.3529 -0.19549 2021 2 20 59265 0.0312 0.3544 -0.19573 2021 2 21 59266 0.0310 0.3559 -0.19584 2021 2 22 59267 0.0308 0.3574 -0.19586 2021 2 23 59268 0.0307 0.3590 -0.19584 2021 2 24 59269 0.0305 0.3605 -0.19584 2021 2 25 59270 0.0304 0.3620 -0.19596 2021 2 26 59271 0.0304 0.3636 -0.19627 2021 2 27 59272 0.0303 0.3651 -0.19684 2021 2 28 59273 0.0303 0.3667 -0.19768 2021 3 1 59274 0.0304 0.3682 -0.19873 2021 3 2 59275 0.0304 0.3698 -0.19989 2021 3 3 59276 0.0305 0.3713 -0.20102 2021 3 4 59277 0.0306 0.3729 -0.20199 2021 3 5 59278 0.0308 0.3744 -0.20274 2021 3 6 59279 0.0309 0.3760 -0.20325 2021 3 7 59280 0.0312 0.3775 -0.20357 2021 3 8 59281 0.0314 0.3791 -0.20379 2021 3 9 59282 0.0317 0.3806 -0.20399 2021 3 10 59283 0.0320 0.3821 -0.20427 2021 3 11 59284 0.0323 0.3837 -0.20468 2021 3 12 59285 0.0327 0.3852 -0.20525 2021 3 13 59286 0.0330 0.3867 -0.20596 2021 3 14 59287 0.0335 0.3883 -0.20677 2021 3 15 59288 0.0339 0.3898 -0.20762 2021 3 16 59289 0.0344 0.3913 -0.20846 2021 3 17 59290 0.0349 0.3928 -0.20921 2021 3 18 59291 0.0354 0.3943 -0.20984 2021 3 19 59292 0.0360 0.3958 -0.21033 2021 3 20 59293 0.0366 0.3973 -0.21068 2021 3 21 59294 0.0372 0.3987 -0.21090 2021 3 22 59295 0.0379 0.4002 -0.21104 2021 3 23 59296 0.0386 0.4017 -0.21116 2021 3 24 59297 0.0393 0.4031 -0.21134 2021 3 25 59298 0.0400 0.4045 -0.21168 2021 3 26 59299 0.0408 0.4060 -0.21224 2021 3 27 59300 0.0416 0.4074 -0.21308 2021 3 28 59301 0.0424 0.4088 -0.21417 2021 3 29 59302 0.0433 0.4102 -0.21543 2021 3 30 59303 0.0442 0.4116 -0.21671 2021 3 31 59304 0.0451 0.4129 -0.21785 2021 4 1 59305 0.0460 0.4143 -0.21876 2021 4 2 59306 0.0470 0.4156 -0.21940 2021 4 3 59307 0.0480 0.4169 -0.21978 2021 4 4 59308 0.0490 0.4183 -0.22001 2021 4 5 59309 0.0500 0.4195 -0.22018 2021 4 6 59310 0.0511 0.4208 -0.22039 2021 4 7 59311 0.0522 0.4221 -0.22071 2021 4 8 59312 0.0533 0.4233 -0.22119 2021 4 9 59313 0.0545 0.4246 -0.22185 2021 4 10 59314 0.0556 0.4258 -0.22265 2021 4 11 59315 0.0568 0.4270 -0.22356 2021 4 12 59316 0.0580 0.4282 -0.22451 2021 4 13 59317 0.0593 0.4294 -0.22543 2021 4 14 59318 0.0605 0.4305 -0.22626 2021 4 15 59319 0.0618 0.4316 -0.22697 2021 4 16 59320 0.0631 0.4327 -0.22753 2021 4 17 59321 0.0645 0.4338 -0.22796 2021 4 18 59322 0.0658 0.4349 -0.22829 2021 4 19 59323 0.0672 0.4359 -0.22856 2021 4 20 59324 0.0686 0.4370 -0.22884 2021 4 21 59325 0.0700 0.4380 -0.22919 2021 4 22 59326 0.0714 0.4390 -0.22971 2021 4 23 59327 0.0729 0.4399 -0.23047 2021 4 24 59328 0.0744 0.4409 -0.23148 2021 4 25 59329 0.0759 0.4418 -0.23271 2021 4 26 59330 0.0774 0.4427 -0.23407 2021 4 27 59331 0.0789 0.4436 -0.23541 2021 4 28 59332 0.0804 0.4444 -0.23659 2021 4 29 59333 0.0820 0.4453 -0.23748 2021 4 30 59334 0.0836 0.4461 -0.23801 2021 5 1 59335 0.0852 0.4469 -0.23819 2021 5 2 59336 0.0868 0.4476 -0.23823 2021 5 3 59337 0.0884 0.4484 -0.23825 2021 5 4 59338 0.0901 0.4491 -0.23830 2021 5 5 59339 0.0917 0.4498 -0.23847 2021 5 6 59340 0.0934 0.4504 -0.23875 2021 5 7 59341 0.0951 0.4511 -0.23908 2021 5 8 59342 0.0968 0.4517 -0.23951 2021 5 9 59343 0.0985 0.4522 -0.24000 2021 5 10 59344 0.1002 0.4528 -0.24047 2021 5 11 59345 0.1020 0.4533 -0.24084 2021 5 12 59346 0.1037 0.4538 -0.24105 2021 5 13 59347 0.1055 0.4543 -0.24104 2021 5 14 59348 0.1073 0.4548 -0.24089 2021 5 15 59349 0.1090 0.4552 -0.24067 2021 5 16 59350 0.1108 0.4556 -0.24040 2021 5 17 59351 0.1126 0.4560 -0.24013 2021 5 18 59352 0.1144 0.4563 -0.23994 2021 5 19 59353 0.1162 0.4566 -0.23994 2021 5 20 59354 0.1181 0.4569 -0.24015 2021 5 21 59355 0.1199 0.4572 -0.24067 2021 5 22 59356 0.1217 0.4574 -0.24147 2021 5 23 59357 0.1236 0.4576 -0.24253 2021 5 24 59358 0.1254 0.4578 -0.24366 2021 5 25 59359 0.1272 0.4580 -0.24468 2021 5 26 59360 0.1291 0.4581 -0.24547 2021 5 27 59361 0.1309 0.4582 -0.24597 2021 5 28 59362 0.1328 0.4583 -0.24619 2021 5 29 59363 0.1347 0.4583 -0.24627 2021 5 30 59364 0.1365 0.4583 -0.24633 2021 5 31 59365 0.1384 0.4583 -0.24650 2021 6 1 59366 0.1402 0.4582 -0.24679 2021 6 2 59367 0.1421 0.4582 -0.24716 2021 6 3 59368 0.1440 0.4581 -0.24756 2021 6 4 59369 0.1458 0.4579 -0.24794 2021 6 5 59370 0.1477 0.4578 -0.24815 2021 6 6 59371 0.1495 0.4576 -0.24821 2021 6 7 59372 0.1514 0.4574 -0.24810 2021 6 8 59373 0.1532 0.4571 -0.24780 2021 6 9 59374 0.1551 0.4569 -0.24731 2021 6 10 59375 0.1569 0.4566 -0.24658 2021 6 11 59376 0.1588 0.4562 -0.24565 2021 6 12 59377 0.1606 0.4559 -0.24462 2021 6 13 59378 0.1624 0.4555 -0.24358 2021 6 14 59379 0.1642 0.4551 -0.24262 2021 6 15 59380 0.1660 0.4546 -0.24181 2021 6 16 59381 0.1678 0.4541 -0.24131 2021 6 17 59382 0.1696 0.4537 -0.24111 2021 6 18 59383 0.1714 0.4531 -0.24110 2021 6 19 59384 0.1732 0.4526 -0.24129 2021 6 20 59385 0.1750 0.4520 -0.24161 2021 6 21 59386 0.1767 0.4514 -0.24189 2021 6 22 59387 0.1785 0.4507 -0.24200 2021 6 23 59388 0.1802 0.4501 -0.24184 2021 6 24 59389 0.1819 0.4494 -0.24142 2021 6 25 59390 0.1836 0.4487 -0.24080 2021 6 26 59391 0.1853 0.4479 -0.24009 2021 6 27 59392 0.1870 0.4472 -0.23938 2021 6 28 59393 0.1887 0.4464 -0.23878 2021 6 29 59394 0.1904 0.4456 -0.23829 2021 6 30 59395 0.1920 0.4447 -0.23787 2021 7 1 59396 0.1936 0.4438 -0.23745 2021 7 2 59397 0.1952 0.4429 -0.23698 2021 7 3 59398 0.1968 0.4420 -0.23644 2021 7 4 59399 0.1984 0.4411 -0.23575 2021 7 5 59400 0.2000 0.4401 -0.23485 2021 7 6 59401 0.2015 0.4391 -0.23381 2021 7 7 59402 0.2030 0.4381 -0.23263 2021 7 8 59403 0.2045 0.4371 -0.23135 2021 7 9 59404 0.2060 0.4360 -0.22998 2021 7 10 59405 0.2075 0.4349 -0.22855 2021 7 11 59406 0.2089 0.4338 -0.22717 2021 7 12 59407 0.2104 0.4327 -0.22590 2021 7 13 59408 0.2118 0.4315 -0.22486 2021 7 14 59409 0.2131 0.4303 -0.22410 2021 7 15 59410 0.2145 0.4291 -0.22356 2021 7 16 59411 0.2158 0.4279 -0.22315 2021 7 17 59412 0.2172 0.4267 -0.22283 2021 7 18 59413 0.2184 0.4254 -0.22252 2021 7 19 59414 0.2197 0.4241 -0.22213 2021 7 20 59415 0.2210 0.4228 -0.22157 2021 7 21 59416 0.2222 0.4215 -0.22077 2021 7 22 59417 0.2234 0.4201 -0.21975 2021 7 23 59418 0.2245 0.4188 -0.21865 2021 7 24 59419 0.2257 0.4174 -0.21756 2021 7 25 59420 0.2268 0.4160 -0.21651 2021 7 26 59421 0.2279 0.4146 -0.21556 2021 7 27 59422 0.2290 0.4132 -0.21482 2021 7 28 59423 0.2300 0.4117 -0.21424 2021 7 29 59424 0.2310 0.4103 -0.21368 2021 7 30 59425 0.2320 0.4088 -0.21310 2021 7 31 59426 0.2330 0.4073 -0.21248 2021 8 1 59427 0.2339 0.4058 -0.21174 2021 8 2 59428 0.2348 0.4042 -0.21077 2021 8 3 59429 0.2357 0.4027 -0.20968 2021 8 4 59430 0.2365 0.4011 -0.20848 2021 8 5 59431 0.2373 0.3996 -0.20727 2021 8 6 59432 0.2381 0.3980 -0.20611 2021 8 7 59433 0.2389 0.3964 -0.20499 2021 8 8 59434 0.2396 0.3948 -0.20398 2021 8 9 59435 0.2403 0.3932 -0.20314 2021 8 10 59436 0.2410 0.3915 -0.20254 2021 8 11 59437 0.2416 0.3899 -0.20220 2021 8 12 59438 0.2422 0.3883 -0.20205 2021 8 13 59439 0.2428 0.3866 -0.20198 2021 8 14 59440 0.2433 0.3849 -0.20186 2021 8 15 59441 0.2438 0.3832 -0.20158 2021 8 16 59442 0.2443 0.3816 -0.20108 2021 8 17 59443 0.2448 0.3799 -0.20036 2021 8 18 59444 0.2452 0.3782 -0.19950 2021 8 19 59445 0.2455 0.3765 -0.19848 2021 8 20 59446 0.2459 0.3747 -0.19743 2021 8 21 59447 0.2462 0.3730 -0.19644 2021 8 22 59448 0.2465 0.3713 -0.19560 2021 8 23 59449 0.2468 0.3696 -0.19496 2021 8 24 59450 0.2470 0.3678 -0.19449 2021 8 25 59451 0.2472 0.3661 -0.19418 2021 8 26 59452 0.2473 0.3643 -0.19393 2021 8 27 59453 0.2474 0.3626 -0.19362 2021 8 28 59454 0.2475 0.3608 -0.19319 2021 8 29 59455 0.2476 0.3591 -0.19260 2021 8 30 59456 0.2476 0.3573 -0.19189 2021 8 31 59457 0.2476 0.3556 -0.19111 2021 9 1 59458 0.2475 0.3538 -0.19026 2021 9 2 59459 0.2475 0.3521 -0.18940 2021 9 3 59460 0.2473 0.3503 -0.18859 2021 9 4 59461 0.2472 0.3486 -0.18784 2021 9 5 59462 0.2470 0.3468 -0.18722 2021 9 6 59463 0.2468 0.3451 -0.18677 2021 9 7 59464 0.2466 0.3433 -0.18651 2021 9 8 59465 0.2463 0.3416 -0.18644 2021 9 9 59466 0.2460 0.3398 -0.18650 2021 9 10 59467 0.2456 0.3381 -0.18660 2021 9 11 59468 0.2453 0.3364 -0.18656 2021 9 12 59469 0.2449 0.3346 -0.18630 2021 9 13 59470 0.2444 0.3329 -0.18581 2021 9 14 59471 0.2439 0.3312 -0.18513 2021 9 15 59472 0.2434 0.3295 -0.18431 2021 9 16 59473 0.2429 0.3278 -0.18346 2021 9 17 59474 0.2423 0.3261 -0.18269 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) 59087 -118.25 0.12 -10.27 0.10 59088 -118.30 0.12 -10.17 0.10 59089 -118.36 0.12 -10.12 0.10 59090 -118.30 0.34 -10.13 0.15 59091 -118.06 0.43 -10.21 0.10 59092 -117.74 0.43 -10.30 0.10 59093 -117.48 0.46 -10.30 0.03 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 59087 0.046 0.048 -0.098 0.099 59088 0.062 0.048 -0.087 0.099 59089 0.083 0.048 -0.076 0.099 59090 0.105 0.134 -0.064 0.155 59091 0.127 0.169 -0.050 0.101 59092 0.151 0.169 -0.036 0.101 59093 0.174 0.184 -0.021 0.029 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).