********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 2 July 2020 Vol. XXXIII No. 027 ______________________________________________________________________ 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 *********************************************************************** * * * 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 6 26 59026 0.15701 .00009 0.43389 .00009 -0.241857 0.000016 20 6 27 59027 0.15888 .00009 0.43334 .00009 -0.241356 0.000014 20 6 28 59028 0.16084 .00009 0.43278 .00009 -0.241028 0.000014 20 6 29 59029 0.16278 .00009 0.43231 .00009 -0.240811 0.000018 20 6 30 59030 0.16480 .00009 0.43206 .00009 -0.240563 0.000019 20 7 1 59031 0.16680 .00009 0.43163 .00009 -0.240129 0.000020 20 7 2 59032 0.16858 .00009 0.43095 .00009 -0.239465 0.000020 _______________________________________________________________________ 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 = 0.1226 + 0.0366 cos A + 0.0843 sin A + 0.0114 cos C - 0.0011 sin C y = 0.3558 + 0.0777 cos A - 0.0369 sin A - 0.0011 cos C - 0.0114 sin C UT1-UTC = -0.2164 - 0.00013 (MJD - 59040) - (UT2-UT1) where A = 2*pi*(MJD-59032)/365.25 and C = 2*pi*(MJD-59032)/435. TAI-UTC(MJD 59033) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-59032)**0.80 S t = 0.00025 (MJD-59032)**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 7 3 59033 0.1703 0.4302 -0.23856 2020 7 4 59034 0.1719 0.4294 -0.23741 2020 7 5 59035 0.1734 0.4286 -0.23608 2020 7 6 59036 0.1750 0.4278 -0.23468 2020 7 7 59037 0.1765 0.4271 -0.23330 2020 7 8 59038 0.1780 0.4263 -0.23199 2020 7 9 59039 0.1795 0.4256 -0.23078 2020 7 10 59040 0.1809 0.4248 -0.22968 2020 7 11 59041 0.1823 0.4239 -0.22866 2020 7 12 59042 0.1837 0.4231 -0.22770 2020 7 13 59043 0.1850 0.4222 -0.22677 2020 7 14 59044 0.1864 0.4213 -0.22582 2020 7 15 59045 0.1877 0.4203 -0.22484 2020 7 16 59046 0.1890 0.4194 -0.22378 2020 7 17 59047 0.1903 0.4184 -0.22263 2020 7 18 59048 0.1915 0.4174 -0.22137 2020 7 19 59049 0.1928 0.4164 -0.22002 2020 7 20 59050 0.1939 0.4153 -0.21864 2020 7 21 59051 0.1951 0.4143 -0.21735 2020 7 22 59052 0.1963 0.4132 -0.21622 2020 7 23 59053 0.1974 0.4121 -0.21533 2020 7 24 59054 0.1985 0.4110 -0.21466 2020 7 25 59055 0.1996 0.4098 -0.21419 2020 7 26 59056 0.2006 0.4087 -0.21385 2020 7 27 59057 0.2017 0.4075 -0.21353 2020 7 28 59058 0.2027 0.4063 -0.21314 2020 7 29 59059 0.2037 0.4051 -0.21259 2020 7 30 59060 0.2046 0.4039 -0.21185 2020 7 31 59061 0.2056 0.4026 -0.21093 2020 8 1 59062 0.2065 0.4014 -0.20991 2020 8 2 59063 0.2074 0.4001 -0.20885 2020 8 3 59064 0.2082 0.3988 -0.20785 2020 8 4 59065 0.2091 0.3975 -0.20695 2020 8 5 59066 0.2099 0.3962 -0.20620 2020 8 6 59067 0.2107 0.3949 -0.20559 2020 8 7 59068 0.2114 0.3935 -0.20511 2020 8 8 59069 0.2121 0.3922 -0.20472 2020 8 9 59070 0.2128 0.3908 -0.20437 2020 8 10 59071 0.2135 0.3894 -0.20402 2020 8 11 59072 0.2142 0.3880 -0.20362 2020 8 12 59073 0.2148 0.3866 -0.20313 2020 8 13 59074 0.2154 0.3852 -0.20253 2020 8 14 59075 0.2159 0.3838 -0.20183 2020 8 15 59076 0.2165 0.3823 -0.20105 2020 8 16 59077 0.2170 0.3809 -0.20023 2020 8 17 59078 0.2174 0.3794 -0.19945 2020 8 18 59079 0.2179 0.3780 -0.19881 2020 8 19 59080 0.2183 0.3765 -0.19837 2020 8 20 59081 0.2187 0.3750 -0.19820 2020 8 21 59082 0.2191 0.3735 -0.19827 2020 8 22 59083 0.2194 0.3720 -0.19850 2020 8 23 59084 0.2197 0.3705 -0.19876 2020 8 24 59085 0.2200 0.3690 -0.19894 2020 8 25 59086 0.2202 0.3675 -0.19894 2020 8 26 59087 0.2204 0.3660 -0.19873 2020 8 27 59088 0.2206 0.3645 -0.19831 2020 8 28 59089 0.2207 0.3630 -0.19775 2020 8 29 59090 0.2209 0.3614 -0.19712 2020 8 30 59091 0.2210 0.3599 -0.19651 2020 8 31 59092 0.2210 0.3584 -0.19597 2020 9 1 59093 0.2211 0.3568 -0.19555 2020 9 2 59094 0.2211 0.3553 -0.19526 2020 9 3 59095 0.2210 0.3538 -0.19510 2020 9 4 59096 0.2210 0.3522 -0.19503 2020 9 5 59097 0.2209 0.3507 -0.19501 2020 9 6 59098 0.2208 0.3492 -0.19500 2020 9 7 59099 0.2206 0.3476 -0.19496 2020 9 8 59100 0.2205 0.3461 -0.19483 2020 9 9 59101 0.2202 0.3446 -0.19462 2020 9 10 59102 0.2200 0.3430 -0.19431 2020 9 11 59103 0.2197 0.3415 -0.19392 2020 9 12 59104 0.2194 0.3400 -0.19349 2020 9 13 59105 0.2191 0.3385 -0.19310 2020 9 14 59106 0.2188 0.3370 -0.19282 2020 9 15 59107 0.2184 0.3355 -0.19275 2020 9 16 59108 0.2180 0.3340 -0.19295 2020 9 17 59109 0.2175 0.3325 -0.19346 2020 9 18 59110 0.2170 0.3310 -0.19420 2020 9 19 59111 0.2165 0.3295 -0.19507 2020 9 20 59112 0.2160 0.3280 -0.19589 2020 9 21 59113 0.2154 0.3266 -0.19653 2020 9 22 59114 0.2149 0.3251 -0.19693 2020 9 23 59115 0.2142 0.3236 -0.19708 2020 9 24 59116 0.2136 0.3222 -0.19704 2020 9 25 59117 0.2129 0.3208 -0.19690 2020 9 26 59118 0.2122 0.3193 -0.19676 2020 9 27 59119 0.2115 0.3179 -0.19668 2020 9 28 59120 0.2107 0.3165 -0.19672 2020 9 29 59121 0.2100 0.3151 -0.19691 2020 9 30 59122 0.2091 0.3138 -0.19723 2020 10 1 59123 0.2083 0.3124 -0.19768 2020 10 2 59124 0.2074 0.3110 -0.19819 2020 10 3 59125 0.2066 0.3097 -0.19874 2020 10 4 59126 0.2056 0.3084 -0.19925 2020 10 5 59127 0.2047 0.3071 -0.19970 2020 10 6 59128 0.2037 0.3058 -0.20004 2020 10 7 59129 0.2027 0.3045 -0.20026 2020 10 8 59130 0.2017 0.3032 -0.20038 2020 10 9 59131 0.2007 0.3020 -0.20042 2020 10 10 59132 0.1996 0.3007 -0.20045 2020 10 11 59133 0.1985 0.2995 -0.20054 2020 10 12 59134 0.1974 0.2983 -0.20079 2020 10 13 59135 0.1963 0.2971 -0.20127 2020 10 14 59136 0.1951 0.2960 -0.20204 2020 10 15 59137 0.1939 0.2948 -0.20309 2020 10 16 59138 0.1927 0.2937 -0.20434 2020 10 17 59139 0.1915 0.2926 -0.20563 2020 10 18 59140 0.1903 0.2915 -0.20682 2020 10 19 59141 0.1890 0.2904 -0.20771 2020 10 20 59142 0.1877 0.2894 -0.20833 2020 10 21 59143 0.1864 0.2883 -0.20870 2020 10 22 59144 0.1851 0.2873 -0.20892 2020 10 23 59145 0.1837 0.2863 -0.20908 2020 10 24 59146 0.1823 0.2853 -0.20927 2020 10 25 59147 0.1809 0.2844 -0.20955 2020 10 26 59148 0.1795 0.2835 -0.20996 2020 10 27 59149 0.1781 0.2826 -0.21049 2020 10 28 59150 0.1767 0.2817 -0.21112 2020 10 29 59151 0.1752 0.2808 -0.21181 2020 10 30 59152 0.1737 0.2800 -0.21252 2020 10 31 59153 0.1723 0.2792 -0.21319 2020 11 1 59154 0.1707 0.2784 -0.21379 2020 11 2 59155 0.1692 0.2776 -0.21426 2020 11 3 59156 0.1677 0.2769 -0.21460 2020 11 4 59157 0.1661 0.2761 -0.21482 2020 11 5 59158 0.1646 0.2754 -0.21493 2020 11 6 59159 0.1630 0.2748 -0.21500 2020 11 7 59160 0.1614 0.2741 -0.21509 2020 11 8 59161 0.1598 0.2735 -0.21528 2020 11 9 59162 0.1582 0.2729 -0.21566 2020 11 10 59163 0.1565 0.2723 -0.21628 2020 11 11 59164 0.1549 0.2718 -0.21717 2020 11 12 59165 0.1533 0.2713 -0.21828 2020 11 13 59166 0.1516 0.2708 -0.21952 2020 11 14 59167 0.1499 0.2703 -0.22072 2020 11 15 59168 0.1483 0.2699 -0.22175 2020 11 16 59169 0.1466 0.2695 -0.22252 2020 11 17 59170 0.1449 0.2691 -0.22301 2020 11 18 59171 0.1432 0.2687 -0.22329 2020 11 19 59172 0.1415 0.2684 -0.22346 2020 11 20 59173 0.1397 0.2681 -0.22362 2020 11 21 59174 0.1380 0.2678 -0.22384 2020 11 22 59175 0.1363 0.2676 -0.22417 2020 11 23 59176 0.1346 0.2673 -0.22461 2020 11 24 59177 0.1328 0.2672 -0.22514 2020 11 25 59178 0.1311 0.2670 -0.22573 2020 11 26 59179 0.1293 0.2668 -0.22634 2020 11 27 59180 0.1276 0.2667 -0.22692 2020 11 28 59181 0.1258 0.2667 -0.22742 2020 11 29 59182 0.1241 0.2666 -0.22781 2020 11 30 59183 0.1223 0.2666 -0.22805 2020 12 1 59184 0.1206 0.2666 -0.22815 2020 12 2 59185 0.1188 0.2666 -0.22813 2020 12 3 59186 0.1171 0.2667 -0.22804 2020 12 4 59187 0.1153 0.2667 -0.22793 2020 12 5 59188 0.1136 0.2669 -0.22790 2020 12 6 59189 0.1118 0.2670 -0.22801 2020 12 7 59190 0.1101 0.2672 -0.22832 2020 12 8 59191 0.1083 0.2674 -0.22886 2020 12 9 59192 0.1066 0.2676 -0.22962 2020 12 10 59193 0.1049 0.2679 -0.23051 2020 12 11 59194 0.1031 0.2681 -0.23144 2020 12 12 59195 0.1014 0.2684 -0.23226 2020 12 13 59196 0.0997 0.2688 -0.23286 2020 12 14 59197 0.0980 0.2692 -0.23321 2020 12 15 59198 0.0963 0.2695 -0.23333 2020 12 16 59199 0.0946 0.2700 -0.23330 2020 12 17 59200 0.0929 0.2704 -0.23322 2020 12 18 59201 0.0912 0.2709 -0.23319 2020 12 19 59202 0.0895 0.2714 -0.23327 2020 12 20 59203 0.0879 0.2719 -0.23346 2020 12 21 59204 0.0862 0.2725 -0.23375 2020 12 22 59205 0.0846 0.2731 -0.23412 2020 12 23 59206 0.0829 0.2737 -0.23452 2020 12 24 59207 0.0813 0.2743 -0.23490 2020 12 25 59208 0.0797 0.2750 -0.23521 2020 12 26 59209 0.0781 0.2757 -0.23542 2020 12 27 59210 0.0765 0.2764 -0.23551 2020 12 28 59211 0.0750 0.2771 -0.23546 2020 12 29 59212 0.0734 0.2779 -0.23530 2020 12 30 59213 0.0719 0.2787 -0.23506 2020 12 31 59214 0.0703 0.2795 -0.23482 2021 1 1 59215 0.0688 0.2803 -0.23466 2021 1 2 59216 0.0673 0.2812 -0.23466 2021 1 3 59217 0.0658 0.2821 -0.23488 2021 1 4 59218 0.0644 0.2830 -0.23535 2021 1 5 59219 0.0629 0.2839 -0.23607 2021 1 6 59220 0.0615 0.2849 -0.23697 2021 1 7 59221 0.0601 0.2859 -0.23795 2021 1 8 59222 0.0587 0.2869 -0.23891 2021 1 9 59223 0.0573 0.2879 -0.23973 2021 1 10 59224 0.0560 0.2890 -0.24034 2021 1 11 59225 0.0546 0.2901 -0.24074 2021 1 12 59226 0.0533 0.2912 -0.24098 2021 1 13 59227 0.0520 0.2923 -0.24116 2021 1 14 59228 0.0508 0.2934 -0.24136 2021 1 15 59229 0.0495 0.2946 -0.24166 2021 1 16 59230 0.0483 0.2958 -0.24206 2021 1 17 59231 0.0471 0.2970 -0.24257 2021 1 18 59232 0.0459 0.2982 -0.24312 2021 1 19 59233 0.0447 0.2995 -0.24368 2021 1 20 59234 0.0436 0.3007 -0.24421 2021 1 21 59235 0.0425 0.3020 -0.24467 2021 1 22 59236 0.0414 0.3033 -0.24504 2021 1 23 59237 0.0403 0.3046 -0.24530 2021 1 24 59238 0.0393 0.3060 -0.24544 2021 1 25 59239 0.0383 0.3073 -0.24546 2021 1 26 59240 0.0373 0.3087 -0.24537 2021 1 27 59241 0.0363 0.3101 -0.24522 2021 1 28 59242 0.0354 0.3115 -0.24507 2021 1 29 59243 0.0345 0.3129 -0.24499 2021 1 30 59244 0.0336 0.3143 -0.24507 2021 1 31 59245 0.0327 0.3158 -0.24533 2021 2 1 59246 0.0319 0.3173 -0.24578 2021 2 2 59247 0.0311 0.3187 -0.24636 2021 2 3 59248 0.0303 0.3202 -0.24700 2021 2 4 59249 0.0296 0.3217 -0.24760 2021 2 5 59250 0.0288 0.3233 -0.24805 2021 2 6 59251 0.0281 0.3248 -0.24830 2021 2 7 59252 0.0275 0.3263 -0.24834 2021 2 8 59253 0.0268 0.3279 -0.24821 2021 2 9 59254 0.0262 0.3295 -0.24805 2021 2 10 59255 0.0257 0.3310 -0.24796 2021 2 11 59256 0.0251 0.3326 -0.24798 2021 2 12 59257 0.0246 0.3342 -0.24813 2021 2 13 59258 0.0241 0.3358 -0.24842 2021 2 14 59259 0.0237 0.3375 -0.24885 2021 2 15 59260 0.0232 0.3391 -0.24941 2021 2 16 59261 0.0229 0.3407 -0.25001 2021 2 17 59262 0.0225 0.3424 -0.25058 2021 2 18 59263 0.0222 0.3440 -0.25104 2021 2 19 59264 0.0219 0.3457 -0.25139 2021 2 20 59265 0.0216 0.3473 -0.25159 2021 2 21 59266 0.0213 0.3490 -0.25160 2021 2 22 59267 0.0211 0.3506 -0.25145 2021 2 23 59268 0.0210 0.3523 -0.25128 2021 2 24 59269 0.0208 0.3540 -0.25118 2021 2 25 59270 0.0207 0.3557 -0.25116 2021 2 26 59271 0.0206 0.3574 -0.25134 2021 2 27 59272 0.0206 0.3591 -0.25181 2021 2 28 59273 0.0206 0.3607 -0.25254 2021 3 1 59274 0.0206 0.3624 -0.25341 2021 3 2 59275 0.0206 0.3641 -0.25441 2021 3 3 59276 0.0207 0.3658 -0.25540 2021 3 4 59277 0.0208 0.3675 -0.25631 2021 3 5 59278 0.0209 0.3692 -0.25710 2021 3 6 59279 0.0211 0.3709 -0.25765 2021 3 7 59280 0.0213 0.3726 -0.25800 2021 3 8 59281 0.0215 0.3743 -0.25822 2021 3 9 59282 0.0218 0.3759 -0.25844 2021 3 10 59283 0.0221 0.3776 -0.25876 2021 3 11 59284 0.0224 0.3793 -0.25920 2021 3 12 59285 0.0228 0.3810 -0.25976 2021 3 13 59286 0.0232 0.3826 -0.26041 2021 3 14 59287 0.0236 0.3843 -0.26111 2021 3 15 59288 0.0241 0.3860 -0.26180 2021 3 16 59289 0.0245 0.3876 -0.26248 2021 3 17 59290 0.0251 0.3893 -0.26312 2021 3 18 59291 0.0256 0.3909 -0.26359 2021 3 19 59292 0.0262 0.3925 -0.26388 2021 3 20 59293 0.0268 0.3942 -0.26399 2021 3 21 59294 0.0274 0.3958 -0.26396 2021 3 22 59295 0.0281 0.3974 -0.26384 2021 3 23 59296 0.0288 0.3990 -0.26373 2021 3 24 59297 0.0295 0.4006 -0.26375 2021 3 25 59298 0.0303 0.4021 -0.26396 2021 3 26 59299 0.0311 0.4037 -0.26439 2021 3 27 59300 0.0319 0.4053 -0.26508 2021 3 28 59301 0.0327 0.4068 -0.26602 2021 3 29 59302 0.0336 0.4083 -0.26716 2021 3 30 59303 0.0345 0.4099 -0.26838 2021 3 31 59304 0.0354 0.4114 -0.26953 2021 4 1 59305 0.0364 0.4129 -0.27047 2021 4 2 59306 0.0374 0.4143 -0.27117 2021 4 3 59307 0.0384 0.4158 -0.27158 2021 4 4 59308 0.0395 0.4172 -0.27178 2021 4 5 59309 0.0405 0.4187 -0.27187 2021 4 6 59310 0.0416 0.4201 -0.27191 2021 4 7 59311 0.0427 0.4215 -0.27200 2021 4 8 59312 0.0439 0.4229 -0.27221 2021 4 9 59313 0.0451 0.4242 -0.27254 2021 4 10 59314 0.0463 0.4256 -0.27293 2021 4 11 59315 0.0475 0.4269 -0.27332 2021 4 12 59316 0.0487 0.4282 -0.27371 2021 4 13 59317 0.0500 0.4295 -0.27405 2021 4 14 59318 0.0513 0.4308 -0.27426 2021 4 15 59319 0.0526 0.4320 -0.27431 2021 4 16 59320 0.0540 0.4333 -0.27420 2021 4 17 59321 0.0554 0.4345 -0.27395 2021 4 18 59322 0.0568 0.4357 -0.27357 2021 4 19 59323 0.0582 0.4369 -0.27320 2021 4 20 59324 0.0596 0.4380 -0.27296 2021 4 21 59325 0.0611 0.4391 -0.27285 2021 4 22 59326 0.0625 0.4402 -0.27297 2021 4 23 59327 0.0640 0.4413 -0.27337 2021 4 24 59328 0.0656 0.4424 -0.27402 2021 4 25 59329 0.0671 0.4434 -0.27483 2021 4 26 59330 0.0687 0.4444 -0.27568 2021 4 27 59331 0.0702 0.4454 -0.27647 2021 4 28 59332 0.0718 0.4464 -0.27709 2021 4 29 59333 0.0734 0.4473 -0.27741 2021 4 30 59334 0.0751 0.4482 -0.27745 2021 5 1 59335 0.0767 0.4491 -0.27731 2021 5 2 59336 0.0784 0.4500 -0.27709 2021 5 3 59337 0.0801 0.4508 -0.27691 2021 5 4 59338 0.0818 0.4517 -0.27683 2021 5 5 59339 0.0835 0.4524 -0.27693 2021 5 6 59340 0.0852 0.4532 -0.27725 2021 5 7 59341 0.0870 0.4539 -0.27767 2021 5 8 59342 0.0887 0.4547 -0.27810 2021 5 9 59343 0.0905 0.4553 -0.27854 2021 5 10 59344 0.0923 0.4560 -0.27899 2021 5 11 59345 0.0941 0.4566 -0.27935 2021 5 12 59346 0.0959 0.4572 -0.27960 2021 5 13 59347 0.0977 0.4578 -0.27977 2021 5 14 59348 0.0995 0.4583 -0.27977 2021 5 15 59349 0.1013 0.4588 -0.27965 2021 5 16 59350 0.1032 0.4593 -0.27950 2021 5 17 59351 0.1050 0.4598 -0.27931 2021 5 18 59352 0.1069 0.4602 -0.27914 2021 5 19 59353 0.1088 0.4606 -0.27912 2021 5 20 59354 0.1107 0.4610 -0.27926 2021 5 21 59355 0.1125 0.4613 -0.27959 2021 5 22 59356 0.1144 0.4616 -0.28018 2021 5 23 59357 0.1163 0.4619 -0.28095 2021 5 24 59358 0.1182 0.4622 -0.28179 2021 5 25 59359 0.1202 0.4624 -0.28249 2021 5 26 59360 0.1221 0.4626 -0.28298 2021 5 27 59361 0.1240 0.4628 -0.28322 2021 5 28 59362 0.1259 0.4629 -0.28321 2021 5 29 59363 0.1278 0.4630 -0.28299 2021 5 30 59364 0.1298 0.4631 -0.28270 2021 5 31 59365 0.1317 0.4631 -0.28243 2021 6 1 59366 0.1336 0.4631 -0.28224 2021 6 2 59367 0.1355 0.4631 -0.28218 2021 6 3 59368 0.1375 0.4631 -0.28227 2021 6 4 59369 0.1394 0.4630 -0.28242 2021 6 5 59370 0.1413 0.4629 -0.28267 2021 6 6 59371 0.1432 0.4627 -0.28284 2021 6 7 59372 0.1451 0.4626 -0.28284 2021 6 8 59373 0.1471 0.4624 -0.28267 2021 6 9 59374 0.1490 0.4621 -0.28240 2021 6 10 59375 0.1509 0.4619 -0.28196 2021 6 11 59376 0.1528 0.4616 -0.28141 2021 6 12 59377 0.1547 0.4613 -0.28082 2021 6 13 59378 0.1566 0.4609 -0.28024 2021 6 14 59379 0.1585 0.4605 -0.27971 2021 6 15 59380 0.1603 0.4601 -0.27927 2021 6 16 59381 0.1622 0.4597 -0.27898 2021 6 17 59382 0.1641 0.4592 -0.27888 2021 6 18 59383 0.1659 0.4587 -0.27898 2021 6 19 59384 0.1678 0.4582 -0.27924 2021 6 20 59385 0.1696 0.4576 -0.27958 2021 6 21 59386 0.1714 0.4571 -0.27988 2021 6 22 59387 0.1733 0.4564 -0.27999 2021 6 23 59388 0.1751 0.4558 -0.27988 2021 6 24 59389 0.1769 0.4551 -0.27951 2021 6 25 59390 0.1786 0.4544 -0.27888 2021 6 26 59391 0.1804 0.4537 -0.27815 2021 6 27 59392 0.1822 0.4529 -0.27749 2021 6 28 59393 0.1839 0.4522 -0.27694 2021 6 29 59394 0.1856 0.4513 -0.27647 2021 6 30 59395 0.1873 0.4505 -0.27619 2021 7 1 59396 0.1890 0.4496 -0.27605 2021 7 2 59397 0.1907 0.4487 -0.27589 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) 59010 -107.42 0.25 -10.55 0.12 59011 -107.66 0.25 -10.56 0.12 59012 -107.86 0.25 -10.45 0.12 59013 -107.90 0.28 -10.33 0.13 59014 -107.87 0.61 -10.25 0.14 59015 -107.96 1.10 -10.11 0.16 59016 -108.23 1.10 -9.88 0.16 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 59010 0.122 0.100 -0.056 0.118 59011 0.147 0.100 -0.038 0.118 59012 0.179 0.100 -0.015 0.118 59013 0.219 0.113 0.012 0.134 59014 0.264 0.244 0.042 0.141 59015 0.313 0.438 0.075 0.157 59016 0.364 0.438 0.110 0.157 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).