********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 13 August 2020 Vol. XXXIII No. 033 ______________________________________________________________________ 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 8 7 59068 0.20799 .00009 0.39079 .00009 -0.203405 0.000017 20 8 8 59069 0.20888 .00009 0.38951 .00009 -0.203041 0.000017 20 8 9 59070 0.20989 .00009 0.38805 .00009 -0.202727 0.000016 20 8 10 59071 0.21097 .00009 0.38669 .00009 -0.202334 0.000013 20 8 11 59072 0.21202 .00009 0.38533 .00009 -0.201818 0.000009 20 8 12 59073 0.21311 .00009 0.38388 .00009 -0.201161 0.000009 20 8 13 59074 0.21421 .00009 0.38231 .00009 -0.200376 0.000010 _______________________________________________________________________ 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 = 0.1256 + 0.0819 cos A + 0.0311 sin A + 0.0057 cos C - 0.0005 sin C y = 0.3578 + 0.0272 cos A - 0.0785 sin A - 0.0005 cos C - 0.0057 sin C UT1-UTC = -0.2123 - 0.00009 (MJD - 59082) - (UT2-UT1) where A = 2*pi*(MJD-59074)/365.25 and C = 2*pi*(MJD-59074)/435. TAI-UTC(MJD 59075) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59074)**0.80 S t = 0.00025 (MJD-59074)**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 8 14 59075 0.2152 0.3809 -0.19951 2020 8 15 59076 0.2160 0.3794 -0.19854 2020 8 16 59077 0.2168 0.3779 -0.19749 2020 8 17 59078 0.2174 0.3765 -0.19645 2020 8 18 59079 0.2180 0.3750 -0.19553 2020 8 19 59080 0.2186 0.3736 -0.19481 2020 8 20 59081 0.2191 0.3722 -0.19435 2020 8 21 59082 0.2195 0.3707 -0.19413 2020 8 22 59083 0.2199 0.3693 -0.19408 2020 8 23 59084 0.2203 0.3678 -0.19409 2020 8 24 59085 0.2206 0.3664 -0.19403 2020 8 25 59086 0.2209 0.3649 -0.19384 2020 8 26 59087 0.2211 0.3634 -0.19345 2020 8 27 59088 0.2213 0.3620 -0.19290 2020 8 28 59089 0.2214 0.3605 -0.19225 2020 8 29 59090 0.2215 0.3590 -0.19157 2020 8 30 59091 0.2216 0.3575 -0.19092 2020 8 31 59092 0.2216 0.3560 -0.19036 2020 9 1 59093 0.2217 0.3545 -0.18991 2020 9 2 59094 0.2216 0.3530 -0.18957 2020 9 3 59095 0.2216 0.3515 -0.18932 2020 9 4 59096 0.2215 0.3500 -0.18913 2020 9 5 59097 0.2214 0.3485 -0.18897 2020 9 6 59098 0.2212 0.3470 -0.18881 2020 9 7 59099 0.2210 0.3455 -0.18858 2020 9 8 59100 0.2208 0.3441 -0.18825 2020 9 9 59101 0.2206 0.3426 -0.18780 2020 9 10 59102 0.2203 0.3411 -0.18722 2020 9 11 59103 0.2200 0.3396 -0.18655 2020 9 12 59104 0.2196 0.3381 -0.18582 2020 9 13 59105 0.2193 0.3367 -0.18511 2020 9 14 59106 0.2189 0.3352 -0.18451 2020 9 15 59107 0.2184 0.3337 -0.18412 2020 9 16 59108 0.2180 0.3323 -0.18400 2020 9 17 59109 0.2175 0.3308 -0.18419 2020 9 18 59110 0.2170 0.3294 -0.18461 2020 9 19 59111 0.2164 0.3280 -0.18516 2020 9 20 59112 0.2159 0.3265 -0.18567 2020 9 21 59113 0.2153 0.3251 -0.18600 2020 9 22 59114 0.2146 0.3237 -0.18610 2020 9 23 59115 0.2140 0.3223 -0.18595 2020 9 24 59116 0.2133 0.3209 -0.18563 2020 9 25 59117 0.2126 0.3195 -0.18520 2020 9 26 59118 0.2118 0.3182 -0.18477 2020 9 27 59119 0.2110 0.3168 -0.18442 2020 9 28 59120 0.2103 0.3154 -0.18420 2020 9 29 59121 0.2094 0.3141 -0.18414 2020 9 30 59122 0.2086 0.3128 -0.18422 2020 10 1 59123 0.2077 0.3115 -0.18442 2020 10 2 59124 0.2068 0.3102 -0.18471 2020 10 3 59125 0.2059 0.3089 -0.18502 2020 10 4 59126 0.2049 0.3076 -0.18532 2020 10 5 59127 0.2039 0.3064 -0.18555 2020 10 6 59128 0.2029 0.3051 -0.18568 2020 10 7 59129 0.2019 0.3039 -0.18572 2020 10 8 59130 0.2008 0.3027 -0.18567 2020 10 9 59131 0.1998 0.3015 -0.18556 2020 10 10 59132 0.1987 0.3003 -0.18544 2020 10 11 59133 0.1975 0.2991 -0.18541 2020 10 12 59134 0.1964 0.2980 -0.18553 2020 10 13 59135 0.1952 0.2969 -0.18590 2020 10 14 59136 0.1940 0.2957 -0.18657 2020 10 15 59137 0.1928 0.2947 -0.18751 2020 10 16 59138 0.1916 0.2936 -0.18865 2020 10 17 59139 0.1903 0.2925 -0.18983 2020 10 18 59140 0.1890 0.2915 -0.19090 2020 10 19 59141 0.1877 0.2905 -0.19174 2020 10 20 59142 0.1864 0.2895 -0.19229 2020 10 21 59143 0.1850 0.2885 -0.19259 2020 10 22 59144 0.1837 0.2875 -0.19272 2020 10 23 59145 0.1823 0.2866 -0.19280 2020 10 24 59146 0.1809 0.2857 -0.19290 2020 10 25 59147 0.1795 0.2848 -0.19310 2020 10 26 59148 0.1781 0.2839 -0.19342 2020 10 27 59149 0.1766 0.2831 -0.19387 2020 10 28 59150 0.1751 0.2822 -0.19442 2020 10 29 59151 0.1736 0.2814 -0.19505 2020 10 30 59152 0.1721 0.2806 -0.19569 2020 10 31 59153 0.1706 0.2799 -0.19630 2020 11 1 59154 0.1691 0.2791 -0.19682 2020 11 2 59155 0.1675 0.2784 -0.19722 2020 11 3 59156 0.1660 0.2777 -0.19748 2020 11 4 59157 0.1644 0.2771 -0.19760 2020 11 5 59158 0.1628 0.2764 -0.19762 2020 11 6 59159 0.1612 0.2758 -0.19758 2020 11 7 59160 0.1596 0.2752 -0.19757 2020 11 8 59161 0.1580 0.2746 -0.19767 2020 11 9 59162 0.1563 0.2741 -0.19794 2020 11 10 59163 0.1547 0.2736 -0.19847 2020 11 11 59164 0.1530 0.2731 -0.19926 2020 11 12 59165 0.1513 0.2726 -0.20029 2020 11 13 59166 0.1497 0.2722 -0.20144 2020 11 14 59167 0.1480 0.2718 -0.20256 2020 11 15 59168 0.1463 0.2714 -0.20352 2020 11 16 59169 0.1446 0.2710 -0.20422 2020 11 17 59170 0.1429 0.2707 -0.20465 2020 11 18 59171 0.1411 0.2704 -0.20487 2020 11 19 59172 0.1394 0.2701 -0.20498 2020 11 20 59173 0.1377 0.2698 -0.20508 2020 11 21 59174 0.1359 0.2696 -0.20525 2020 11 22 59175 0.1342 0.2694 -0.20553 2020 11 23 59176 0.1325 0.2692 -0.20591 2020 11 24 59177 0.1307 0.2691 -0.20639 2020 11 25 59178 0.1290 0.2689 -0.20693 2020 11 26 59179 0.1272 0.2688 -0.20749 2020 11 27 59180 0.1254 0.2688 -0.20801 2020 11 28 59181 0.1237 0.2687 -0.20846 2020 11 29 59182 0.1219 0.2687 -0.20879 2020 11 30 59183 0.1202 0.2687 -0.20894 2020 12 1 59184 0.1184 0.2688 -0.20894 2020 12 2 59185 0.1166 0.2689 -0.20882 2020 12 3 59186 0.1149 0.2690 -0.20864 2020 12 4 59187 0.1131 0.2691 -0.20845 2020 12 5 59188 0.1114 0.2692 -0.20833 2020 12 6 59189 0.1096 0.2694 -0.20837 2020 12 7 59190 0.1079 0.2696 -0.20861 2020 12 8 59191 0.1061 0.2699 -0.20909 2020 12 9 59192 0.1044 0.2701 -0.20978 2020 12 10 59193 0.1026 0.2704 -0.21062 2020 12 11 59194 0.1009 0.2707 -0.21149 2020 12 12 59195 0.0992 0.2711 -0.21226 2020 12 13 59196 0.0974 0.2715 -0.21283 2020 12 14 59197 0.0957 0.2719 -0.21315 2020 12 15 59198 0.0940 0.2723 -0.21323 2020 12 16 59199 0.0923 0.2727 -0.21317 2020 12 17 59200 0.0906 0.2732 -0.21306 2020 12 18 59201 0.0890 0.2737 -0.21301 2020 12 19 59202 0.0873 0.2743 -0.21306 2020 12 20 59203 0.0856 0.2748 -0.21322 2020 12 21 59204 0.0840 0.2754 -0.21350 2020 12 22 59205 0.0823 0.2760 -0.21384 2020 12 23 59206 0.0807 0.2767 -0.21422 2020 12 24 59207 0.0791 0.2773 -0.21457 2020 12 25 59208 0.0775 0.2780 -0.21485 2020 12 26 59209 0.0759 0.2787 -0.21504 2020 12 27 59210 0.0743 0.2795 -0.21509 2020 12 28 59211 0.0727 0.2802 -0.21501 2020 12 29 59212 0.0712 0.2810 -0.21480 2020 12 30 59213 0.0697 0.2818 -0.21452 2020 12 31 59214 0.0681 0.2827 -0.21421 2021 1 1 59215 0.0666 0.2835 -0.21397 2021 1 2 59216 0.0652 0.2844 -0.21387 2021 1 3 59217 0.0637 0.2853 -0.21397 2021 1 4 59218 0.0622 0.2863 -0.21429 2021 1 5 59219 0.0608 0.2872 -0.21482 2021 1 6 59220 0.0594 0.2882 -0.21550 2021 1 7 59221 0.0580 0.2892 -0.21623 2021 1 8 59222 0.0566 0.2902 -0.21690 2021 1 9 59223 0.0552 0.2913 -0.21742 2021 1 10 59224 0.0539 0.2924 -0.21771 2021 1 11 59225 0.0526 0.2934 -0.21779 2021 1 12 59226 0.0513 0.2946 -0.21772 2021 1 13 59227 0.0500 0.2957 -0.21758 2021 1 14 59228 0.0487 0.2968 -0.21748 2021 1 15 59229 0.0475 0.2980 -0.21748 2021 1 16 59230 0.0463 0.2992 -0.21763 2021 1 17 59231 0.0451 0.3004 -0.21790 2021 1 18 59232 0.0439 0.3017 -0.21828 2021 1 19 59233 0.0428 0.3029 -0.21870 2021 1 20 59234 0.0417 0.3042 -0.21913 2021 1 21 59235 0.0406 0.3055 -0.21950 2021 1 22 59236 0.0395 0.3068 -0.21978 2021 1 23 59237 0.0385 0.3081 -0.21993 2021 1 24 59238 0.0374 0.3094 -0.21996 2021 1 25 59239 0.0365 0.3108 -0.21987 2021 1 26 59240 0.0355 0.3122 -0.21970 2021 1 27 59241 0.0345 0.3136 -0.21950 2021 1 28 59242 0.0336 0.3150 -0.21934 2021 1 29 59243 0.0327 0.3164 -0.21932 2021 1 30 59244 0.0319 0.3178 -0.21951 2021 1 31 59245 0.0310 0.3193 -0.21994 2021 2 1 59246 0.0302 0.3207 -0.22060 2021 2 2 59247 0.0295 0.3222 -0.22142 2021 2 3 59248 0.0287 0.3237 -0.22230 2021 2 4 59249 0.0280 0.3252 -0.22313 2021 2 5 59250 0.0273 0.3267 -0.22381 2021 2 6 59251 0.0266 0.3283 -0.22427 2021 2 7 59252 0.0260 0.3298 -0.22453 2021 2 8 59253 0.0254 0.3314 -0.22461 2021 2 9 59254 0.0248 0.3329 -0.22461 2021 2 10 59255 0.0242 0.3345 -0.22463 2021 2 11 59256 0.0237 0.3361 -0.22474 2021 2 12 59257 0.0232 0.3377 -0.22499 2021 2 13 59258 0.0228 0.3393 -0.22539 2021 2 14 59259 0.0224 0.3409 -0.22590 2021 2 15 59260 0.0220 0.3425 -0.22648 2021 2 16 59261 0.0216 0.3441 -0.22707 2021 2 17 59262 0.0213 0.3457 -0.22760 2021 2 18 59263 0.0210 0.3474 -0.22803 2021 2 19 59264 0.0207 0.3490 -0.22833 2021 2 20 59265 0.0204 0.3506 -0.22849 2021 2 21 59266 0.0202 0.3523 -0.22853 2021 2 22 59267 0.0201 0.3540 -0.22848 2021 2 23 59268 0.0199 0.3556 -0.22840 2021 2 24 59269 0.0198 0.3573 -0.22837 2021 2 25 59270 0.0197 0.3589 -0.22847 2021 2 26 59271 0.0197 0.3606 -0.22879 2021 2 27 59272 0.0196 0.3623 -0.22938 2021 2 28 59273 0.0196 0.3639 -0.23025 2021 3 1 59274 0.0197 0.3656 -0.23131 2021 3 2 59275 0.0198 0.3673 -0.23247 2021 3 3 59276 0.0199 0.3690 -0.23358 2021 3 4 59277 0.0200 0.3706 -0.23453 2021 3 5 59278 0.0202 0.3723 -0.23526 2021 3 6 59279 0.0204 0.3740 -0.23576 2021 3 7 59280 0.0206 0.3757 -0.23609 2021 3 8 59281 0.0209 0.3773 -0.23635 2021 3 9 59282 0.0212 0.3790 -0.23664 2021 3 10 59283 0.0215 0.3806 -0.23704 2021 3 11 59284 0.0219 0.3823 -0.23763 2021 3 12 59285 0.0223 0.3839 -0.23841 2021 3 13 59286 0.0227 0.3856 -0.23940 2021 3 14 59287 0.0231 0.3872 -0.24054 2021 3 15 59288 0.0236 0.3889 -0.24178 2021 3 16 59289 0.0242 0.3905 -0.24305 2021 3 17 59290 0.0247 0.3921 -0.24427 2021 3 18 59291 0.0253 0.3937 -0.24538 2021 3 19 59292 0.0259 0.3953 -0.24635 2021 3 20 59293 0.0265 0.3969 -0.24719 2021 3 21 59294 0.0272 0.3985 -0.24795 2021 3 22 59295 0.0279 0.4001 -0.24866 2021 3 23 59296 0.0286 0.4017 -0.24936 2021 3 24 59297 0.0294 0.4032 -0.25011 2021 3 25 59298 0.0302 0.4048 -0.25095 2021 3 26 59299 0.0310 0.4063 -0.25195 2021 3 27 59300 0.0319 0.4079 -0.25308 2021 3 28 59301 0.0327 0.4094 -0.25438 2021 3 29 59302 0.0336 0.4109 -0.25580 2021 3 30 59303 0.0346 0.4124 -0.25720 2021 3 31 59304 0.0355 0.4139 -0.25844 2021 4 1 59305 0.0365 0.4153 -0.25940 2021 4 2 59306 0.0376 0.4168 -0.26001 2021 4 3 59307 0.0386 0.4182 -0.26037 2021 4 4 59308 0.0397 0.4196 -0.26060 2021 4 5 59309 0.0408 0.4210 -0.26080 2021 4 6 59310 0.0419 0.4224 -0.26108 2021 4 7 59311 0.0431 0.4238 -0.26160 2021 4 8 59312 0.0442 0.4251 -0.26234 2021 4 9 59313 0.0455 0.4265 -0.26320 2021 4 10 59314 0.0467 0.4278 -0.26419 2021 4 11 59315 0.0479 0.4291 -0.26528 2021 4 12 59316 0.0492 0.4304 -0.26637 2021 4 13 59317 0.0505 0.4316 -0.26739 2021 4 14 59318 0.0519 0.4329 -0.26828 2021 4 15 59319 0.0532 0.4341 -0.26900 2021 4 16 59320 0.0546 0.4353 -0.26957 2021 4 17 59321 0.0560 0.4365 -0.26997 2021 4 18 59322 0.0574 0.4377 -0.27024 2021 4 19 59323 0.0589 0.4388 -0.27044 2021 4 20 59324 0.0603 0.4399 -0.27063 2021 4 21 59325 0.0618 0.4410 -0.27087 2021 4 22 59326 0.0633 0.4421 -0.27123 2021 4 23 59327 0.0649 0.4432 -0.27176 2021 4 24 59328 0.0664 0.4442 -0.27254 2021 4 25 59329 0.0680 0.4452 -0.27350 2021 4 26 59330 0.0696 0.4462 -0.27449 2021 4 27 59331 0.0712 0.4472 -0.27544 2021 4 28 59332 0.0728 0.4481 -0.27622 2021 4 29 59333 0.0744 0.4490 -0.27675 2021 4 30 59334 0.0761 0.4499 -0.27700 2021 5 1 59335 0.0778 0.4508 -0.27701 2021 5 2 59336 0.0795 0.4516 -0.27692 2021 5 3 59337 0.0812 0.4524 -0.27681 2021 5 4 59338 0.0829 0.4532 -0.27684 2021 5 5 59339 0.0846 0.4540 -0.27706 2021 5 6 59340 0.0864 0.4547 -0.27739 2021 5 7 59341 0.0882 0.4554 -0.27778 2021 5 8 59342 0.0899 0.4561 -0.27821 2021 5 9 59343 0.0917 0.4568 -0.27865 2021 5 10 59344 0.0935 0.4574 -0.27907 2021 5 11 59345 0.0954 0.4580 -0.27940 2021 5 12 59346 0.0972 0.4586 -0.27957 2021 5 13 59347 0.0990 0.4591 -0.27954 2021 5 14 59348 0.1009 0.4596 -0.27937 2021 5 15 59349 0.1027 0.4601 -0.27904 2021 5 16 59350 0.1046 0.4606 -0.27856 2021 5 17 59351 0.1065 0.4610 -0.27800 2021 5 18 59352 0.1084 0.4614 -0.27754 2021 5 19 59353 0.1103 0.4618 -0.27725 2021 5 20 59354 0.1122 0.4622 -0.27714 2021 5 21 59355 0.1141 0.4625 -0.27727 2021 5 22 59356 0.1160 0.4628 -0.27766 2021 5 23 59357 0.1179 0.4631 -0.27819 2021 5 24 59358 0.1198 0.4633 -0.27869 2021 5 25 59359 0.1218 0.4635 -0.27909 2021 5 26 59360 0.1237 0.4637 -0.27927 2021 5 27 59361 0.1256 0.4638 -0.27924 2021 5 28 59362 0.1276 0.4639 -0.27904 2021 5 29 59363 0.1295 0.4640 -0.27869 2021 5 30 59364 0.1315 0.4641 -0.27828 2021 5 31 59365 0.1334 0.4641 -0.27792 2021 6 1 59366 0.1354 0.4641 -0.27767 2021 6 2 59367 0.1373 0.4641 -0.27757 2021 6 3 59368 0.1392 0.4640 -0.27756 2021 6 4 59369 0.1412 0.4639 -0.27755 2021 6 5 59370 0.1431 0.4638 -0.27748 2021 6 6 59371 0.1451 0.4636 -0.27730 2021 6 7 59372 0.1470 0.4635 -0.27696 2021 6 8 59373 0.1489 0.4632 -0.27648 2021 6 9 59374 0.1509 0.4630 -0.27587 2021 6 10 59375 0.1528 0.4627 -0.27503 2021 6 11 59376 0.1547 0.4624 -0.27402 2021 6 12 59377 0.1566 0.4621 -0.27287 2021 6 13 59378 0.1585 0.4617 -0.27166 2021 6 14 59379 0.1604 0.4614 -0.27049 2021 6 15 59380 0.1623 0.4609 -0.26946 2021 6 16 59381 0.1642 0.4605 -0.26865 2021 6 17 59382 0.1661 0.4600 -0.26809 2021 6 18 59383 0.1679 0.4595 -0.26774 2021 6 19 59384 0.1698 0.4590 -0.26752 2021 6 20 59385 0.1716 0.4584 -0.26738 2021 6 21 59386 0.1735 0.4578 -0.26721 2021 6 22 59387 0.1753 0.4572 -0.26692 2021 6 23 59388 0.1771 0.4566 -0.26643 2021 6 24 59389 0.1789 0.4559 -0.26570 2021 6 25 59390 0.1807 0.4552 -0.26481 2021 6 26 59391 0.1825 0.4544 -0.26382 2021 6 27 59392 0.1842 0.4537 -0.26281 2021 6 28 59393 0.1860 0.4529 -0.26186 2021 6 29 59394 0.1877 0.4521 -0.26097 2021 6 30 59395 0.1894 0.4512 -0.26015 2021 7 1 59396 0.1911 0.4504 -0.25938 2021 7 2 59397 0.1928 0.4495 -0.25861 2021 7 3 59398 0.1945 0.4486 -0.25774 2021 7 4 59399 0.1961 0.4476 -0.25675 2021 7 5 59400 0.1977 0.4466 -0.25562 2021 7 6 59401 0.1994 0.4457 -0.25435 2021 7 7 59402 0.2010 0.4446 -0.25292 2021 7 8 59403 0.2025 0.4436 -0.25133 2021 7 9 59404 0.2041 0.4425 -0.24965 2021 7 10 59405 0.2056 0.4414 -0.24792 2021 7 11 59406 0.2071 0.4403 -0.24623 2021 7 12 59407 0.2086 0.4392 -0.24470 2021 7 13 59408 0.2101 0.4380 -0.24346 2021 7 14 59409 0.2115 0.4368 -0.24247 2021 7 15 59410 0.2130 0.4356 -0.24173 2021 7 16 59411 0.2144 0.4343 -0.24120 2021 7 17 59412 0.2157 0.4331 -0.24073 2021 7 18 59413 0.2171 0.4318 -0.24019 2021 7 19 59414 0.2184 0.4305 -0.23946 2021 7 20 59415 0.2197 0.4292 -0.23853 2021 7 21 59416 0.2210 0.4278 -0.23738 2021 7 22 59417 0.2223 0.4265 -0.23603 2021 7 23 59418 0.2235 0.4251 -0.23460 2021 7 24 59419 0.2247 0.4237 -0.23322 2021 7 25 59420 0.2259 0.4223 -0.23201 2021 7 26 59421 0.2270 0.4208 -0.23100 2021 7 27 59422 0.2282 0.4194 -0.23018 2021 7 28 59423 0.2293 0.4179 -0.22954 2021 7 29 59424 0.2303 0.4164 -0.22905 2021 7 30 59425 0.2314 0.4149 -0.22855 2021 7 31 59426 0.2324 0.4134 -0.22795 2021 8 1 59427 0.2334 0.4118 -0.22724 2021 8 2 59428 0.2343 0.4102 -0.22647 2021 8 3 59429 0.2352 0.4087 -0.22557 2021 8 4 59430 0.2361 0.4071 -0.22459 2021 8 5 59431 0.2370 0.4055 -0.22360 2021 8 6 59432 0.2378 0.4039 -0.22256 2021 8 7 59433 0.2386 0.4022 -0.22158 2021 8 8 59434 0.2394 0.4006 -0.22075 2021 8 9 59435 0.2402 0.3989 -0.22008 2021 8 10 59436 0.2409 0.3972 -0.21960 2021 8 11 59437 0.2415 0.3956 -0.21939 2021 8 12 59438 0.2422 0.3939 -0.21933 2021 8 13 59439 0.2428 0.3922 -0.21933 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) 59052 -114.27 0.45 -10.42 0.14 59053 -114.25 0.45 -10.29 0.14 59054 -114.29 0.45 -10.26 0.14 59055 -114.40 0.35 -10.31 0.13 59056 -114.58 0.40 -10.36 0.12 59057 -114.83 0.40 -10.31 0.12 59058 -115.16 0.42 -10.21 0.11 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 59052 0.182 0.178 -0.146 0.137 59053 0.180 0.178 -0.141 0.137 59054 0.179 0.178 -0.135 0.137 59055 0.178 0.140 -0.129 0.130 59056 0.180 0.160 -0.122 0.118 59057 0.183 0.160 -0.116 0.118 59058 0.186 0.165 -0.110 0.112 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).