********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 14 May 2020 Vol. XXXIII No. 020 ______________________________________________________________________ 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. * * * * Currently, 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. * * * * 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 5 8 58977 0.08764 .00009 0.44280 .00009 -0.248685 0.000018 20 5 9 58978 0.08957 .00009 0.44355 .00009 -0.249290 0.000014 20 5 10 58979 0.09152 .00009 0.44452 .00009 -0.249735 0.000015 20 5 11 58980 0.09318 .00009 0.44550 .00009 -0.249982 0.000015 20 5 12 58981 0.09461 .00009 0.44627 .00009 -0.250136 0.000013 20 5 13 58982 0.09595 .00009 0.44666 .00009 -0.250334 0.000012 20 5 14 58983 0.09718 .00009 0.44670 .00009 -0.250567 0.000013 _______________________________________________________________________ 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 = 0.1230 - 0.0473 cos A + 0.0974 sin A + 0.0247 cos C - 0.0000 sin C y = 0.3550 + 0.0901 cos A + 0.0440 sin A - 0.0000 cos C - 0.0247 sin C UT1-UTC = -0.2191 - 0.00015 (MJD - 58991) - (UT2-UT1) where A = 2*pi*(MJD-58983)/365.25 and C = 2*pi*(MJD-58983)/435. TAI-UTC(MJD 58984) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-58983)**0.80 S t = 0.00025 (MJD-58983)**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 5 15 58984 0.0986 0.4466 -0.25080 2020 5 16 58985 0.1002 0.4465 -0.25109 2020 5 17 58986 0.1019 0.4466 -0.25150 2020 5 18 58987 0.1038 0.4468 -0.25200 2020 5 19 58988 0.1056 0.4471 -0.25257 2020 5 20 58989 0.1074 0.4475 -0.25313 2020 5 21 58990 0.1091 0.4478 -0.25363 2020 5 22 58991 0.1107 0.4481 -0.25401 2020 5 23 58992 0.1124 0.4482 -0.25424 2020 5 24 58993 0.1141 0.4484 -0.25432 2020 5 25 58994 0.1159 0.4484 -0.25424 2020 5 26 58995 0.1178 0.4485 -0.25405 2020 5 27 58996 0.1197 0.4486 -0.25388 2020 5 28 58997 0.1215 0.4488 -0.25378 2020 5 29 58998 0.1233 0.4489 -0.25384 2020 5 30 58999 0.1251 0.4489 -0.25407 2020 5 31 59000 0.1268 0.4490 -0.25448 2020 6 1 59001 0.1287 0.4490 -0.25504 2020 6 2 59002 0.1305 0.4490 -0.25564 2020 6 3 59003 0.1324 0.4489 -0.25617 2020 6 4 59004 0.1343 0.4489 -0.25651 2020 6 5 59005 0.1362 0.4489 -0.25657 2020 6 6 59006 0.1380 0.4488 -0.25633 2020 6 7 59007 0.1399 0.4487 -0.25586 2020 6 8 59008 0.1417 0.4486 -0.25525 2020 6 9 59009 0.1435 0.4484 -0.25458 2020 6 10 59010 0.1453 0.4481 -0.25395 2020 6 11 59011 0.1471 0.4479 -0.25340 2020 6 12 59012 0.1489 0.4476 -0.25296 2020 6 13 59013 0.1507 0.4473 -0.25263 2020 6 14 59014 0.1525 0.4470 -0.25238 2020 6 15 59015 0.1543 0.4466 -0.25216 2020 6 16 59016 0.1561 0.4463 -0.25193 2020 6 17 59017 0.1579 0.4458 -0.25163 2020 6 18 59018 0.1596 0.4454 -0.25122 2020 6 19 59019 0.1614 0.4449 -0.25066 2020 6 20 59020 0.1631 0.4444 -0.24994 2020 6 21 59021 0.1649 0.4438 -0.24908 2020 6 22 59022 0.1666 0.4433 -0.24813 2020 6 23 59023 0.1683 0.4427 -0.24716 2020 6 24 59024 0.1700 0.4420 -0.24626 2020 6 25 59025 0.1717 0.4414 -0.24553 2020 6 26 59026 0.1734 0.4407 -0.24499 2020 6 27 59027 0.1750 0.4400 -0.24467 2020 6 28 59028 0.1767 0.4392 -0.24453 2020 6 29 59029 0.1783 0.4384 -0.24449 2020 6 30 59030 0.1800 0.4376 -0.24443 2020 7 1 59031 0.1816 0.4368 -0.24426 2020 7 2 59032 0.1832 0.4360 -0.24390 2020 7 3 59033 0.1847 0.4351 -0.24330 2020 7 4 59034 0.1863 0.4342 -0.24251 2020 7 5 59035 0.1879 0.4333 -0.24159 2020 7 6 59036 0.1894 0.4323 -0.24062 2020 7 7 59037 0.1909 0.4313 -0.23968 2020 7 8 59038 0.1924 0.4303 -0.23883 2020 7 9 59039 0.1939 0.4293 -0.23807 2020 7 10 59040 0.1954 0.4283 -0.23742 2020 7 11 59041 0.1968 0.4272 -0.23685 2020 7 12 59042 0.1982 0.4261 -0.23632 2020 7 13 59043 0.1996 0.4250 -0.23581 2020 7 14 59044 0.2010 0.4238 -0.23526 2020 7 15 59045 0.2024 0.4227 -0.23463 2020 7 16 59046 0.2037 0.4215 -0.23390 2020 7 17 59047 0.2050 0.4203 -0.23305 2020 7 18 59048 0.2063 0.4190 -0.23210 2020 7 19 59049 0.2076 0.4178 -0.23108 2020 7 20 59050 0.2089 0.4165 -0.23005 2020 7 21 59051 0.2101 0.4152 -0.22910 2020 7 22 59052 0.2113 0.4139 -0.22832 2020 7 23 59053 0.2125 0.4126 -0.22776 2020 7 24 59054 0.2136 0.4112 -0.22745 2020 7 25 59055 0.2147 0.4099 -0.22734 2020 7 26 59056 0.2158 0.4085 -0.22733 2020 7 27 59057 0.2169 0.4071 -0.22732 2020 7 28 59058 0.2180 0.4057 -0.22718 2020 7 29 59059 0.2190 0.4042 -0.22686 2020 7 30 59060 0.2200 0.4028 -0.22632 2020 7 31 59061 0.2210 0.4013 -0.22559 2020 8 1 59062 0.2219 0.3998 -0.22473 2020 8 2 59063 0.2228 0.3983 -0.22382 2020 8 3 59064 0.2237 0.3968 -0.22293 2020 8 4 59065 0.2246 0.3953 -0.22214 2020 8 5 59066 0.2254 0.3937 -0.22147 2020 8 6 59067 0.2262 0.3922 -0.22094 2020 8 7 59068 0.2270 0.3906 -0.22051 2020 8 8 59069 0.2277 0.3890 -0.22016 2020 8 9 59070 0.2284 0.3874 -0.21983 2020 8 10 59071 0.2291 0.3858 -0.21948 2020 8 11 59072 0.2297 0.3842 -0.21907 2020 8 12 59073 0.2304 0.3825 -0.21857 2020 8 13 59074 0.2309 0.3809 -0.21796 2020 8 14 59075 0.2315 0.3792 -0.21724 2020 8 15 59076 0.2320 0.3776 -0.21644 2020 8 16 59077 0.2325 0.3759 -0.21561 2020 8 17 59078 0.2330 0.3742 -0.21483 2020 8 18 59079 0.2334 0.3726 -0.21419 2020 8 19 59080 0.2338 0.3709 -0.21377 2020 8 20 59081 0.2342 0.3692 -0.21363 2020 8 21 59082 0.2345 0.3675 -0.21372 2020 8 22 59083 0.2348 0.3657 -0.21398 2020 8 23 59084 0.2351 0.3640 -0.21428 2020 8 24 59085 0.2353 0.3623 -0.21447 2020 8 25 59086 0.2356 0.3606 -0.21449 2020 8 26 59087 0.2357 0.3589 -0.21428 2020 8 27 59088 0.2359 0.3571 -0.21386 2020 8 28 59089 0.2360 0.3554 -0.21330 2020 8 29 59090 0.2361 0.3537 -0.21267 2020 8 30 59091 0.2361 0.3519 -0.21205 2020 8 31 59092 0.2361 0.3502 -0.21154 2020 9 1 59093 0.2361 0.3484 -0.21116 2020 9 2 59094 0.2361 0.3467 -0.21091 2020 9 3 59095 0.2360 0.3450 -0.21079 2020 9 4 59096 0.2358 0.3432 -0.21077 2020 9 5 59097 0.2357 0.3415 -0.21080 2020 9 6 59098 0.2355 0.3397 -0.21084 2020 9 7 59099 0.2353 0.3380 -0.21083 2020 9 8 59100 0.2350 0.3363 -0.21074 2020 9 9 59101 0.2348 0.3346 -0.21055 2020 9 10 59102 0.2344 0.3328 -0.21026 2020 9 11 59103 0.2341 0.3311 -0.20988 2020 9 12 59104 0.2337 0.3294 -0.20945 2020 9 13 59105 0.2333 0.3277 -0.20904 2020 9 14 59106 0.2328 0.3260 -0.20875 2020 9 15 59107 0.2324 0.3243 -0.20865 2020 9 16 59108 0.2319 0.3226 -0.20884 2020 9 17 59109 0.2313 0.3210 -0.20932 2020 9 18 59110 0.2307 0.3193 -0.21003 2020 9 19 59111 0.2301 0.3176 -0.21086 2020 9 20 59112 0.2295 0.3160 -0.21165 2020 9 21 59113 0.2288 0.3143 -0.21226 2020 9 22 59114 0.2281 0.3127 -0.21263 2020 9 23 59115 0.2274 0.3111 -0.21275 2020 9 24 59116 0.2266 0.3095 -0.21269 2020 9 25 59117 0.2258 0.3079 -0.21252 2020 9 26 59118 0.2250 0.3063 -0.21234 2020 9 27 59119 0.2242 0.3047 -0.21222 2020 9 28 59120 0.2233 0.3032 -0.21222 2020 9 29 59121 0.2224 0.3016 -0.21236 2020 9 30 59122 0.2214 0.3001 -0.21263 2020 10 1 59123 0.2204 0.2986 -0.21300 2020 10 2 59124 0.2194 0.2971 -0.21344 2020 10 3 59125 0.2184 0.2956 -0.21389 2020 10 4 59126 0.2173 0.2942 -0.21431 2020 10 5 59127 0.2163 0.2927 -0.21464 2020 10 6 59128 0.2151 0.2913 -0.21486 2020 10 7 59129 0.2140 0.2899 -0.21497 2020 10 8 59130 0.2128 0.2885 -0.21497 2020 10 9 59131 0.2116 0.2871 -0.21490 2020 10 10 59132 0.2104 0.2857 -0.21481 2020 10 11 59133 0.2092 0.2844 -0.21479 2020 10 12 59134 0.2079 0.2831 -0.21492 2020 10 13 59135 0.2066 0.2818 -0.21528 2020 10 14 59136 0.2053 0.2805 -0.21593 2020 10 15 59137 0.2039 0.2792 -0.21685 2020 10 16 59138 0.2025 0.2780 -0.21797 2020 10 17 59139 0.2011 0.2768 -0.21912 2020 10 18 59140 0.1997 0.2756 -0.22017 2020 10 19 59141 0.1983 0.2744 -0.22098 2020 10 20 59142 0.1968 0.2733 -0.22152 2020 10 21 59143 0.1953 0.2721 -0.22181 2020 10 22 59144 0.1938 0.2710 -0.22194 2020 10 23 59145 0.1922 0.2699 -0.22201 2020 10 24 59146 0.1907 0.2689 -0.22212 2020 10 25 59147 0.1891 0.2679 -0.22232 2020 10 26 59148 0.1875 0.2669 -0.22265 2020 10 27 59149 0.1859 0.2659 -0.22310 2020 10 28 59150 0.1843 0.2649 -0.22366 2020 10 29 59151 0.1826 0.2640 -0.22428 2020 10 30 59152 0.1809 0.2631 -0.22493 2020 10 31 59153 0.1793 0.2622 -0.22554 2020 11 1 59154 0.1775 0.2614 -0.22608 2020 11 2 59155 0.1758 0.2606 -0.22650 2020 11 3 59156 0.1741 0.2598 -0.22680 2020 11 4 59157 0.1723 0.2590 -0.22697 2020 11 5 59158 0.1706 0.2583 -0.22705 2020 11 6 59159 0.1688 0.2575 -0.22709 2020 11 7 59160 0.1670 0.2569 -0.22716 2020 11 8 59161 0.1652 0.2562 -0.22735 2020 11 9 59162 0.1633 0.2556 -0.22773 2020 11 10 59163 0.1615 0.2550 -0.22837 2020 11 11 59164 0.1596 0.2544 -0.22930 2020 11 12 59165 0.1578 0.2539 -0.23048 2020 11 13 59166 0.1559 0.2534 -0.23179 2020 11 14 59167 0.1540 0.2529 -0.23312 2020 11 15 59168 0.1521 0.2525 -0.23430 2020 11 16 59169 0.1502 0.2520 -0.23525 2020 11 17 59170 0.1483 0.2517 -0.23596 2020 11 18 59171 0.1464 0.2513 -0.23649 2020 11 19 59172 0.1444 0.2510 -0.23692 2020 11 20 59173 0.1425 0.2507 -0.23734 2020 11 21 59174 0.1406 0.2504 -0.23781 2020 11 22 59175 0.1386 0.2502 -0.23835 2020 11 23 59176 0.1367 0.2500 -0.23894 2020 11 24 59177 0.1347 0.2498 -0.23956 2020 11 25 59178 0.1327 0.2497 -0.24019 2020 11 26 59179 0.1308 0.2496 -0.24078 2020 11 27 59180 0.1288 0.2495 -0.24130 2020 11 28 59181 0.1268 0.2494 -0.24172 2020 11 29 59182 0.1249 0.2494 -0.24201 2020 11 30 59183 0.1229 0.2494 -0.24215 2020 12 1 59184 0.1209 0.2495 -0.24214 2020 12 2 59185 0.1189 0.2496 -0.24201 2020 12 3 59186 0.1170 0.2497 -0.24182 2020 12 4 59187 0.1150 0.2498 -0.24162 2020 12 5 59188 0.1130 0.2500 -0.24149 2020 12 6 59189 0.1110 0.2502 -0.24151 2020 12 7 59190 0.1091 0.2504 -0.24171 2020 12 8 59191 0.1071 0.2507 -0.24212 2020 12 9 59192 0.1052 0.2510 -0.24272 2020 12 10 59193 0.1032 0.2513 -0.24342 2020 12 11 59194 0.1012 0.2517 -0.24412 2020 12 12 59195 0.0993 0.2521 -0.24469 2020 12 13 59196 0.0974 0.2525 -0.24503 2020 12 14 59197 0.0954 0.2529 -0.24510 2020 12 15 59198 0.0935 0.2534 -0.24493 2020 12 16 59199 0.0916 0.2539 -0.24463 2020 12 17 59200 0.0897 0.2545 -0.24431 2020 12 18 59201 0.0878 0.2551 -0.24405 2020 12 19 59202 0.0859 0.2557 -0.24388 2020 12 20 59203 0.0840 0.2563 -0.24383 2020 12 21 59204 0.0822 0.2570 -0.24390 2020 12 22 59205 0.0803 0.2577 -0.24409 2020 12 23 59206 0.0785 0.2584 -0.24435 2020 12 24 59207 0.0766 0.2592 -0.24461 2020 12 25 59208 0.0748 0.2599 -0.24484 2020 12 26 59209 0.0730 0.2608 -0.24493 2020 12 27 59210 0.0712 0.2616 -0.24484 2020 12 28 59211 0.0694 0.2625 -0.24454 2020 12 29 59212 0.0677 0.2634 -0.24404 2020 12 30 59213 0.0659 0.2643 -0.24341 2020 12 31 59214 0.0642 0.2653 -0.24272 2021 1 1 59215 0.0625 0.2662 -0.24209 2021 1 2 59216 0.0608 0.2673 -0.24154 2021 1 3 59217 0.0591 0.2683 -0.24116 2021 1 4 59218 0.0575 0.2694 -0.24100 2021 1 5 59219 0.0558 0.2704 -0.24106 2021 1 6 59220 0.0542 0.2716 -0.24126 2021 1 7 59221 0.0526 0.2727 -0.24150 2021 1 8 59222 0.0510 0.2739 -0.24167 2021 1 9 59223 0.0495 0.2751 -0.24167 2021 1 10 59224 0.0479 0.2763 -0.24144 2021 1 11 59225 0.0464 0.2775 -0.24105 2021 1 12 59226 0.0449 0.2788 -0.24060 2021 1 13 59227 0.0435 0.2801 -0.24013 2021 1 14 59228 0.0420 0.2814 -0.23973 2021 1 15 59229 0.0406 0.2828 -0.23948 2021 1 16 59230 0.0392 0.2841 -0.23934 2021 1 17 59231 0.0378 0.2855 -0.23926 2021 1 18 59232 0.0365 0.2869 -0.23921 2021 1 19 59233 0.0352 0.2883 -0.23921 2021 1 20 59234 0.0339 0.2898 -0.23923 2021 1 21 59235 0.0326 0.2913 -0.23917 2021 1 22 59236 0.0314 0.2927 -0.23904 2021 1 23 59237 0.0301 0.2943 -0.23883 2021 1 24 59238 0.0290 0.2958 -0.23852 2021 1 25 59239 0.0278 0.2973 -0.23813 2021 1 26 59240 0.0267 0.2989 -0.23767 2021 1 27 59241 0.0256 0.3005 -0.23725 2021 1 28 59242 0.0245 0.3021 -0.23697 2021 1 29 59243 0.0234 0.3037 -0.23683 2021 1 30 59244 0.0224 0.3054 -0.23687 2021 1 31 59245 0.0214 0.3070 -0.23716 2021 2 1 59246 0.0205 0.3087 -0.23778 2021 2 2 59247 0.0195 0.3104 -0.23857 2021 2 3 59248 0.0186 0.3121 -0.23947 2021 2 4 59249 0.0178 0.3138 -0.24040 2021 2 5 59250 0.0169 0.3155 -0.24117 2021 2 6 59251 0.0161 0.3173 -0.24175 2021 2 7 59252 0.0154 0.3190 -0.24216 2021 2 8 59253 0.0146 0.3208 -0.24238 2021 2 9 59254 0.0139 0.3226 -0.24248 2021 2 10 59255 0.0133 0.3244 -0.24261 2021 2 11 59256 0.0126 0.3262 -0.24280 2021 2 12 59257 0.0120 0.3280 -0.24309 2021 2 13 59258 0.0114 0.3298 -0.24357 2021 2 14 59259 0.0109 0.3316 -0.24419 2021 2 15 59260 0.0104 0.3335 -0.24493 2021 2 16 59261 0.0099 0.3353 -0.24568 2021 2 17 59262 0.0095 0.3372 -0.24642 2021 2 18 59263 0.0091 0.3391 -0.24711 2021 2 19 59264 0.0087 0.3409 -0.24772 2021 2 20 59265 0.0084 0.3428 -0.24814 2021 2 21 59266 0.0081 0.3447 -0.24840 2021 2 22 59267 0.0078 0.3466 -0.24853 2021 2 23 59268 0.0076 0.3485 -0.24858 2021 2 24 59269 0.0074 0.3504 -0.24867 2021 2 25 59270 0.0072 0.3523 -0.24892 2021 2 26 59271 0.0071 0.3542 -0.24939 2021 2 27 59272 0.0070 0.3561 -0.25021 2021 2 28 59273 0.0069 0.3580 -0.25129 2021 3 1 59274 0.0069 0.3599 -0.25252 2021 3 2 59275 0.0069 0.3619 -0.25384 2021 3 3 59276 0.0070 0.3638 -0.25519 2021 3 4 59277 0.0070 0.3657 -0.25638 2021 3 5 59278 0.0072 0.3676 -0.25738 2021 3 6 59279 0.0073 0.3695 -0.25820 2021 3 7 59280 0.0075 0.3714 -0.25886 2021 3 8 59281 0.0077 0.3733 -0.25941 2021 3 9 59282 0.0080 0.3752 -0.25994 2021 3 10 59283 0.0083 0.3771 -0.26052 2021 3 11 59284 0.0086 0.3790 -0.26120 2021 3 12 59285 0.0090 0.3809 -0.26203 2021 3 13 59286 0.0094 0.3828 -0.26300 2021 3 14 59287 0.0098 0.3847 -0.26407 2021 3 15 59288 0.0103 0.3865 -0.26518 2021 3 16 59289 0.0108 0.3884 -0.26627 2021 3 17 59290 0.0113 0.3903 -0.26730 2021 3 18 59291 0.0119 0.3921 -0.26823 2021 3 19 59292 0.0125 0.3939 -0.26893 2021 3 20 59293 0.0131 0.3958 -0.26949 2021 3 21 59294 0.0138 0.3976 -0.26994 2021 3 22 59295 0.0145 0.3994 -0.27032 2021 3 23 59296 0.0153 0.4012 -0.27063 2021 3 24 59297 0.0160 0.4030 -0.27106 2021 3 25 59298 0.0169 0.4048 -0.27172 2021 3 26 59299 0.0177 0.4065 -0.27258 2021 3 27 59300 0.0186 0.4083 -0.27371 2021 3 28 59301 0.0195 0.4100 -0.27507 2021 3 29 59302 0.0204 0.4118 -0.27657 2021 3 30 59303 0.0214 0.4135 -0.27805 2021 3 31 59304 0.0224 0.4152 -0.27941 2021 4 1 59305 0.0234 0.4168 -0.28058 2021 4 2 59306 0.0245 0.4185 -0.28152 2021 4 3 59307 0.0256 0.4202 -0.28225 2021 4 4 59308 0.0267 0.4218 -0.28284 2021 4 5 59309 0.0279 0.4234 -0.28336 2021 4 6 59310 0.0291 0.4250 -0.28389 2021 4 7 59311 0.0303 0.4266 -0.28454 2021 4 8 59312 0.0315 0.4281 -0.28537 2021 4 9 59313 0.0328 0.4297 -0.28630 2021 4 10 59314 0.0341 0.4312 -0.28732 2021 4 11 59315 0.0355 0.4327 -0.28841 2021 4 12 59316 0.0368 0.4342 -0.28958 2021 4 13 59317 0.0382 0.4356 -0.29074 2021 4 14 59318 0.0396 0.4371 -0.29178 2021 4 15 59319 0.0411 0.4385 -0.29268 2021 4 16 59320 0.0425 0.4399 -0.29343 2021 4 17 59321 0.0440 0.4412 -0.29401 2021 4 18 59322 0.0456 0.4426 -0.29452 2021 4 19 59323 0.0471 0.4439 -0.29502 2021 4 20 59324 0.0487 0.4452 -0.29559 2021 4 21 59325 0.0503 0.4465 -0.29633 2021 4 22 59326 0.0519 0.4477 -0.29724 2021 4 23 59327 0.0535 0.4489 -0.29845 2021 4 24 59328 0.0552 0.4501 -0.29993 2021 4 25 59329 0.0569 0.4513 -0.30161 2021 4 26 59330 0.0586 0.4524 -0.30338 2021 4 27 59331 0.0603 0.4535 -0.30509 2021 4 28 59332 0.0621 0.4546 -0.30655 2021 4 29 59333 0.0639 0.4557 -0.30771 2021 4 30 59334 0.0657 0.4567 -0.30861 2021 5 1 59335 0.0675 0.4577 -0.30929 2021 5 2 59336 0.0693 0.4587 -0.30983 2021 5 3 59337 0.0712 0.4597 -0.31036 2021 5 4 59338 0.0730 0.4606 -0.31096 2021 5 5 59339 0.0749 0.4615 -0.31166 2021 5 6 59340 0.0768 0.4623 -0.31248 2021 5 7 59341 0.0788 0.4632 -0.31340 2021 5 8 59342 0.0807 0.4640 -0.31442 2021 5 9 59343 0.0827 0.4647 -0.31546 2021 5 10 59344 0.0846 0.4655 -0.31644 2021 5 11 59345 0.0866 0.4662 -0.31726 2021 5 12 59346 0.0886 0.4669 -0.31793 2021 5 13 59347 0.0906 0.4675 -0.31844 2021 5 14 59348 0.0926 0.4681 -0.31874 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) 58961 -105.30 0.32 -9.39 0.14 58962 -105.38 0.32 -9.58 0.14 58963 -105.34 0.32 -9.88 0.14 58964 -105.29 0.31 -10.13 0.08 58965 -105.32 0.32 -10.31 0.07 58966 -105.48 0.34 -10.45 0.05 58967 -105.71 0.34 -10.59 0.05 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 58961 0.170 0.127 -0.023 0.138 58962 0.165 0.127 -0.041 0.138 58963 0.153 0.127 -0.056 0.138 58964 0.133 0.123 -0.062 0.077 58965 0.106 0.125 -0.063 0.072 58966 0.075 0.134 -0.059 0.052 58967 0.042 0.134 -0.052 0.052 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).