**********************************************************************
* *
* I E R S B U L L E T I N - A *
* *
* Rapid Service/Prediction of Earth Orientation *
**********************************************************************
30 April 2020 Vol. XXXIII No. 018
______________________________________________________________________
GENERAL INFORMATION:
To receive this information electronically, contact:
ser7@maia.usno.navy.mil or use
<http://maia.usno.navy.mil/docrequest.html>
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 <http://www.usno.navy.mil/USNO/earth-orientation/
eo-info/general/input-data>. 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 4 24 58963 0.06554 .00009 0.42826 .00009 -0.241353 0.000015
20 4 25 58964 0.06701 .00009 0.42938 .00009 -0.241676 0.000013
20 4 26 58965 0.06833 .00009 0.43071 .00009 -0.241868 0.000017
20 4 27 58966 0.06943 .00009 0.43191 .00009 -0.241973 0.000019
20 4 28 58967 0.07069 .00009 0.43288 .00009 -0.242049 0.000022
20 4 29 58968 0.07230 .00009 0.43373 .00009 -0.242168 0.000024
20 4 30 58969 0.07409 .00009 0.43462 .00009 -0.242312 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 = 0.1219 - 0.0664 cos A + 0.0824 sin A + 0.0211 cos C + 0.0043 sin C
y = 0.3533 + 0.0761 cos A + 0.0610 sin A + 0.0043 cos C - 0.0211 sin C
UT1-UTC = -0.2069 - 0.00015 (MJD - 58977) - (UT2-UT1)
where A = 2*pi*(MJD-58969)/365.25 and C = 2*pi*(MJD-58969)/435.
TAI-UTC(MJD 58970) = 37.0
The accuracy may be estimated from the expressions:
S x,y = 0.00068 (MJD-58969)**0.80 S t = 0.00025 (MJD-58969)**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 1 58970 0.0759 0.4355 -0.24237
2020 5 2 58971 0.0777 0.4364 -0.24256
2020 5 3 58972 0.0794 0.4373 -0.24302
2020 5 4 58973 0.0810 0.4382 -0.24372
2020 5 5 58974 0.0826 0.4391 -0.24459
2020 5 6 58975 0.0842 0.4399 -0.24549
2020 5 7 58976 0.0858 0.4405 -0.24629
2020 5 8 58977 0.0875 0.4412 -0.24688
2020 5 9 58978 0.0892 0.4418 -0.24718
2020 5 10 58979 0.0909 0.4424 -0.24721
2020 5 11 58980 0.0927 0.4430 -0.24704
2020 5 12 58981 0.0944 0.4436 -0.24677
2020 5 13 58982 0.0961 0.4442 -0.24656
2020 5 14 58983 0.0979 0.4448 -0.24641
2020 5 15 58984 0.0996 0.4453 -0.24634
2020 5 16 58985 0.1013 0.4457 -0.24634
2020 5 17 58986 0.1031 0.4462 -0.24640
2020 5 18 58987 0.1049 0.4466 -0.24652
2020 5 19 58988 0.1067 0.4470 -0.24666
2020 5 20 58989 0.1085 0.4473 -0.24677
2020 5 21 58990 0.1104 0.4477 -0.24684
2020 5 22 58991 0.1122 0.4480 -0.24683
2020 5 23 58992 0.1140 0.4483 -0.24671
2020 5 24 58993 0.1158 0.4485 -0.24648
2020 5 25 58994 0.1177 0.4487 -0.24613
2020 5 26 58995 0.1195 0.4489 -0.24572
2020 5 27 58996 0.1214 0.4490 -0.24531
2020 5 28 58997 0.1232 0.4492 -0.24495
2020 5 29 58998 0.1251 0.4493 -0.24474
2020 5 30 58999 0.1269 0.4493 -0.24471
2020 5 31 59000 0.1288 0.4494 -0.24487
2020 6 1 59001 0.1307 0.4494 -0.24519
2020 6 2 59002 0.1325 0.4493 -0.24558
2020 6 3 59003 0.1344 0.4493 -0.24592
2020 6 4 59004 0.1363 0.4492 -0.24610
2020 6 5 59005 0.1381 0.4491 -0.24605
2020 6 6 59006 0.1400 0.4489 -0.24575
2020 6 7 59007 0.1418 0.4487 -0.24526
2020 6 8 59008 0.1437 0.4485 -0.24466
2020 6 9 59009 0.1456 0.4483 -0.24403
2020 6 10 59010 0.1474 0.4480 -0.24346
2020 6 11 59011 0.1493 0.4477 -0.24297
2020 6 12 59012 0.1511 0.4474 -0.24258
2020 6 13 59013 0.1529 0.4470 -0.24228
2020 6 14 59014 0.1548 0.4467 -0.24206
2020 6 15 59015 0.1566 0.4462 -0.24187
2020 6 16 59016 0.1584 0.4458 -0.24167
2020 6 17 59017 0.1602 0.4453 -0.24140
2020 6 18 59018 0.1620 0.4448 -0.24103
2020 6 19 59019 0.1638 0.4443 -0.24052
2020 6 20 59020 0.1656 0.4437 -0.23986
2020 6 21 59021 0.1674 0.4431 -0.23908
2020 6 22 59022 0.1691 0.4425 -0.23821
2020 6 23 59023 0.1709 0.4419 -0.23733
2020 6 24 59024 0.1726 0.4412 -0.23652
2020 6 25 59025 0.1744 0.4405 -0.23587
2020 6 26 59026 0.1761 0.4397 -0.23542
2020 6 27 59027 0.1778 0.4390 -0.23518
2020 6 28 59028 0.1795 0.4382 -0.23513
2020 6 29 59029 0.1811 0.4374 -0.23517
2020 6 30 59030 0.1828 0.4365 -0.23520
2020 7 1 59031 0.1844 0.4357 -0.23513
2020 7 2 59032 0.1861 0.4348 -0.23487
2020 7 3 59033 0.1877 0.4339 -0.23438
2020 7 4 59034 0.1893 0.4329 -0.23370
2020 7 5 59035 0.1909 0.4319 -0.23287
2020 7 6 59036 0.1924 0.4309 -0.23199
2020 7 7 59037 0.1940 0.4299 -0.23113
2020 7 8 59038 0.1955 0.4289 -0.23034
2020 7 9 59039 0.1970 0.4278 -0.22966
2020 7 10 59040 0.1985 0.4267 -0.22908
2020 7 11 59041 0.1999 0.4256 -0.22860
2020 7 12 59042 0.2014 0.4244 -0.22816
2020 7 13 59043 0.2028 0.4233 -0.22774
2020 7 14 59044 0.2042 0.4221 -0.22729
2020 7 15 59045 0.2056 0.4209 -0.22676
2020 7 16 59046 0.2069 0.4196 -0.22612
2020 7 17 59047 0.2082 0.4184 -0.22535
2020 7 18 59048 0.2096 0.4171 -0.22447
2020 7 19 59049 0.2108 0.4158 -0.22349
2020 7 20 59050 0.2121 0.4145 -0.22248
2020 7 21 59051 0.2133 0.4131 -0.22153
2020 7 22 59052 0.2145 0.4118 -0.22073
2020 7 23 59053 0.2157 0.4104 -0.22014
2020 7 24 59054 0.2169 0.4090 -0.21978
2020 7 25 59055 0.2180 0.4076 -0.21961
2020 7 26 59056 0.2191 0.4061 -0.21955
2020 7 27 59057 0.2202 0.4047 -0.21947
2020 7 28 59058 0.2212 0.4032 -0.21929
2020 7 29 59059 0.2223 0.4017 -0.21892
2020 7 30 59060 0.2233 0.4002 -0.21833
2020 7 31 59061 0.2242 0.3987 -0.21754
2020 8 1 59062 0.2252 0.3972 -0.21662
2020 8 2 59063 0.2261 0.3956 -0.21563
2020 8 3 59064 0.2269 0.3940 -0.21467
2020 8 4 59065 0.2278 0.3925 -0.21380
2020 8 5 59066 0.2286 0.3909 -0.21305
2020 8 6 59067 0.2294 0.3893 -0.21243
2020 8 7 59068 0.2302 0.3876 -0.21192
2020 8 8 59069 0.2309 0.3860 -0.21149
2020 8 9 59070 0.2316 0.3844 -0.21109
2020 8 10 59071 0.2322 0.3827 -0.21068
2020 8 11 59072 0.2329 0.3810 -0.21020
2020 8 12 59073 0.2335 0.3794 -0.20963
2020 8 13 59074 0.2341 0.3777 -0.20895
2020 8 14 59075 0.2346 0.3760 -0.20817
2020 8 15 59076 0.2351 0.3743 -0.20730
2020 8 16 59077 0.2356 0.3726 -0.20640
2020 8 17 59078 0.2360 0.3708 -0.20555
2020 8 18 59079 0.2364 0.3691 -0.20486
2020 8 19 59080 0.2368 0.3674 -0.20439
2020 8 20 59081 0.2371 0.3656 -0.20419
2020 8 21 59082 0.2375 0.3639 -0.20424
2020 8 22 59083 0.2377 0.3621 -0.20446
2020 8 23 59084 0.2380 0.3604 -0.20472
2020 8 24 59085 0.2382 0.3586 -0.20488
2020 8 25 59086 0.2384 0.3568 -0.20486
2020 8 26 59087 0.2385 0.3551 -0.20462
2020 8 27 59088 0.2386 0.3533 -0.20416
2020 8 28 59089 0.2387 0.3515 -0.20356
2020 8 29 59090 0.2387 0.3498 -0.20289
2020 8 30 59091 0.2387 0.3480 -0.20225
2020 8 31 59092 0.2387 0.3462 -0.20168
2020 9 1 59093 0.2386 0.3444 -0.20124
2020 9 2 59094 0.2385 0.3427 -0.20095
2020 9 3 59095 0.2384 0.3409 -0.20078
2020 9 4 59096 0.2383 0.3391 -0.20072
2020 9 5 59097 0.2381 0.3374 -0.20070
2020 9 6 59098 0.2378 0.3356 -0.20070
2020 9 7 59099 0.2376 0.3338 -0.20065
2020 9 8 59100 0.2373 0.3321 -0.20051
2020 9 9 59101 0.2369 0.3303 -0.20028
2020 9 10 59102 0.2366 0.3286 -0.19995
2020 9 11 59103 0.2362 0.3268 -0.19953
2020 9 12 59104 0.2357 0.3251 -0.19907
2020 9 13 59105 0.2353 0.3234 -0.19863
2020 9 14 59106 0.2348 0.3216 -0.19829
2020 9 15 59107 0.2342 0.3199 -0.19815
2020 9 16 59108 0.2337 0.3182 -0.19829
2020 9 17 59109 0.2331 0.3165 -0.19872
2020 9 18 59110 0.2324 0.3149 -0.19939
2020 9 19 59111 0.2318 0.3132 -0.20017
2020 9 20 59112 0.2311 0.3115 -0.20091
2020 9 21 59113 0.2303 0.3099 -0.20148
2020 9 22 59114 0.2296 0.3082 -0.20181
2020 9 23 59115 0.2288 0.3066 -0.20189
2020 9 24 59116 0.2280 0.3050 -0.20178
2020 9 25 59117 0.2271 0.3034 -0.20157
2020 9 26 59118 0.2262 0.3018 -0.20136
2020 9 27 59119 0.2253 0.3002 -0.20121
2020 9 28 59120 0.2244 0.2986 -0.20118
2020 9 29 59121 0.2234 0.2971 -0.20129
2020 9 30 59122 0.2224 0.2955 -0.20154
2020 10 1 59123 0.2213 0.2940 -0.20190
2020 10 2 59124 0.2203 0.2925 -0.20232
2020 10 3 59125 0.2192 0.2910 -0.20276
2020 10 4 59126 0.2180 0.2896 -0.20317
2020 10 5 59127 0.2169 0.2881 -0.20349
2020 10 6 59128 0.2157 0.2867 -0.20371
2020 10 7 59129 0.2145 0.2853 -0.20381
2020 10 8 59130 0.2132 0.2839 -0.20381
2020 10 9 59131 0.2120 0.2825 -0.20374
2020 10 10 59132 0.2107 0.2812 -0.20366
2020 10 11 59133 0.2094 0.2798 -0.20365
2020 10 12 59134 0.2080 0.2785 -0.20379
2020 10 13 59135 0.2067 0.2772 -0.20417
2020 10 14 59136 0.2053 0.2760 -0.20483
2020 10 15 59137 0.2038 0.2747 -0.20578
2020 10 16 59138 0.2024 0.2735 -0.20692
2020 10 17 59139 0.2009 0.2723 -0.20811
2020 10 18 59140 0.1994 0.2711 -0.20919
2020 10 19 59141 0.1979 0.2700 -0.21004
2020 10 20 59142 0.1964 0.2689 -0.21061
2020 10 21 59143 0.1948 0.2677 -0.21095
2020 10 22 59144 0.1932 0.2667 -0.21112
2020 10 23 59145 0.1916 0.2656 -0.21125
2020 10 24 59146 0.1900 0.2646 -0.21141
2020 10 25 59147 0.1884 0.2636 -0.21168
2020 10 26 59148 0.1867 0.2626 -0.21207
2020 10 27 59149 0.1850 0.2617 -0.21260
2020 10 28 59150 0.1833 0.2607 -0.21324
2020 10 29 59151 0.1816 0.2598 -0.21396
2020 10 30 59152 0.1798 0.2590 -0.21472
2020 10 31 59153 0.1781 0.2581 -0.21545
2020 11 1 59154 0.1763 0.2573 -0.21612
2020 11 2 59155 0.1745 0.2565 -0.21669
2020 11 3 59156 0.1727 0.2558 -0.21714
2020 11 4 59157 0.1709 0.2550 -0.21747
2020 11 5 59158 0.1690 0.2544 -0.21771
2020 11 6 59159 0.1672 0.2537 -0.21789
2020 11 7 59160 0.1653 0.2530 -0.21807
2020 11 8 59161 0.1634 0.2524 -0.21833
2020 11 9 59162 0.1615 0.2519 -0.21875
2020 11 10 59163 0.1596 0.2513 -0.21938
2020 11 11 59164 0.1577 0.2508 -0.22025
2020 11 12 59165 0.1558 0.2503 -0.22133
2020 11 13 59166 0.1539 0.2498 -0.22250
2020 11 14 59167 0.1519 0.2494 -0.22363
2020 11 15 59168 0.1500 0.2490 -0.22456
2020 11 16 59169 0.1480 0.2486 -0.22521
2020 11 17 59170 0.1460 0.2483 -0.22556
2020 11 18 59171 0.1440 0.2480 -0.22567
2020 11 19 59172 0.1420 0.2477 -0.22563
2020 11 20 59173 0.1400 0.2475 -0.22556
2020 11 21 59174 0.1380 0.2473 -0.22553
2020 11 22 59175 0.1360 0.2471 -0.22559
2020 11 23 59176 0.1340 0.2470 -0.22577
2020 11 24 59177 0.1320 0.2469 -0.22606
2020 11 25 59178 0.1300 0.2468 -0.22642
2020 11 26 59179 0.1280 0.2467 -0.22682
2020 11 27 59180 0.1260 0.2467 -0.22720
2020 11 28 59181 0.1239 0.2467 -0.22751
2020 11 29 59182 0.1219 0.2468 -0.22768
2020 11 30 59183 0.1199 0.2469 -0.22768
2020 12 1 59184 0.1179 0.2470 -0.22748
2020 12 2 59185 0.1158 0.2471 -0.22710
2020 12 3 59186 0.1138 0.2473 -0.22660
2020 12 4 59187 0.1118 0.2475 -0.22607
2020 12 5 59188 0.1098 0.2477 -0.22557
2020 12 6 59189 0.1078 0.2480 -0.22518
2020 12 7 59190 0.1058 0.2483 -0.22500
2020 12 8 59191 0.1038 0.2487 -0.22505
2020 12 9 59192 0.1018 0.2490 -0.22531
2020 12 10 59193 0.0998 0.2494 -0.22570
2020 12 11 59194 0.0978 0.2499 -0.22613
2020 12 12 59195 0.0958 0.2503 -0.22645
2020 12 13 59196 0.0938 0.2508 -0.22653
2020 12 14 59197 0.0919 0.2514 -0.22643
2020 12 15 59198 0.0899 0.2519 -0.22620
2020 12 16 59199 0.0879 0.2525 -0.22586
2020 12 17 59200 0.0860 0.2531 -0.22550
2020 12 18 59201 0.0841 0.2538 -0.22524
2020 12 19 59202 0.0822 0.2545 -0.22506
2020 12 20 59203 0.0803 0.2552 -0.22493
2020 12 21 59204 0.0784 0.2559 -0.22484
2020 12 22 59205 0.0765 0.2567 -0.22481
2020 12 23 59206 0.0746 0.2575 -0.22482
2020 12 24 59207 0.0728 0.2583 -0.22481
2020 12 25 59208 0.0709 0.2592 -0.22473
2020 12 26 59209 0.0691 0.2601 -0.22459
2020 12 27 59210 0.0673 0.2610 -0.22435
2020 12 28 59211 0.0655 0.2620 -0.22401
2020 12 29 59212 0.0638 0.2629 -0.22357
2020 12 30 59213 0.0620 0.2639 -0.22311
2020 12 31 59214 0.0603 0.2650 -0.22273
2021 1 1 59215 0.0585 0.2660 -0.22241
2021 1 2 59216 0.0568 0.2671 -0.22220
2021 1 3 59217 0.0552 0.2682 -0.22220
2021 1 4 59218 0.0535 0.2694 -0.22251
2021 1 5 59219 0.0519 0.2706 -0.22304
2021 1 6 59220 0.0502 0.2718 -0.22376
2021 1 7 59221 0.0486 0.2730 -0.22462
2021 1 8 59222 0.0471 0.2742 -0.22539
2021 1 9 59223 0.0455 0.2755 -0.22604
2021 1 10 59224 0.0440 0.2768 -0.22650
2021 1 11 59225 0.0425 0.2781 -0.22672
2021 1 12 59226 0.0410 0.2795 -0.22673
2021 1 13 59227 0.0395 0.2808 -0.22671
2021 1 14 59228 0.0381 0.2822 -0.22667
2021 1 15 59229 0.0367 0.2836 -0.22669
2021 1 16 59230 0.0353 0.2851 -0.22688
2021 1 17 59231 0.0339 0.2865 -0.22723
2021 1 18 59232 0.0326 0.2880 -0.22770
2021 1 19 59233 0.0313 0.2895 -0.22821
2021 1 20 59234 0.0300 0.2910 -0.22874
2021 1 21 59235 0.0288 0.2926 -0.22926
2021 1 22 59236 0.0276 0.2941 -0.22972
2021 1 23 59237 0.0264 0.2957 -0.23000
2021 1 24 59238 0.0252 0.2973 -0.23011
2021 1 25 59239 0.0241 0.2990 -0.23007
2021 1 26 59240 0.0230 0.3006 -0.22991
2021 1 27 59241 0.0219 0.3022 -0.22973
2021 1 28 59242 0.0208 0.3039 -0.22965
2021 1 29 59243 0.0198 0.3056 -0.22972
2021 1 30 59244 0.0188 0.3073 -0.23010
2021 1 31 59245 0.0179 0.3090 -0.23071
2021 2 1 59246 0.0170 0.3108 -0.23148
2021 2 2 59247 0.0161 0.3125 -0.23240
2021 2 3 59248 0.0152 0.3143 -0.23344
2021 2 4 59249 0.0144 0.3161 -0.23443
2021 2 5 59250 0.0136 0.3179 -0.23529
2021 2 6 59251 0.0129 0.3197 -0.23601
2021 2 7 59252 0.0121 0.3215 -0.23655
2021 2 8 59253 0.0114 0.3233 -0.23692
2021 2 9 59254 0.0108 0.3252 -0.23720
2021 2 10 59255 0.0102 0.3270 -0.23747
2021 2 11 59256 0.0096 0.3289 -0.23782
2021 2 12 59257 0.0090 0.3308 -0.23830
2021 2 13 59258 0.0085 0.3326 -0.23893
2021 2 14 59259 0.0080 0.3345 -0.23969
2021 2 15 59260 0.0076 0.3364 -0.24053
2021 2 16 59261 0.0071 0.3383 -0.24139
2021 2 17 59262 0.0068 0.3402 -0.24224
2021 2 18 59263 0.0064 0.3421 -0.24301
2021 2 19 59264 0.0061 0.3441 -0.24358
2021 2 20 59265 0.0058 0.3460 -0.24401
2021 2 21 59266 0.0056 0.3479 -0.24434
2021 2 22 59267 0.0054 0.3499 -0.24457
2021 2 23 59268 0.0052 0.3518 -0.24469
2021 2 24 59269 0.0051 0.3537 -0.24488
2021 2 25 59270 0.0050 0.3557 -0.24527
2021 2 26 59271 0.0049 0.3576 -0.24582
2021 2 27 59272 0.0049 0.3596 -0.24661
2021 2 28 59273 0.0049 0.3615 -0.24764
2021 3 1 59274 0.0050 0.3635 -0.24885
2021 3 2 59275 0.0051 0.3654 -0.25011
2021 3 3 59276 0.0052 0.3674 -0.25135
2021 3 4 59277 0.0054 0.3693 -0.25248
2021 3 5 59278 0.0056 0.3713 -0.25342
2021 3 6 59279 0.0058 0.3732 -0.25416
2021 3 7 59280 0.0061 0.3751 -0.25474
2021 3 8 59281 0.0064 0.3771 -0.25517
2021 3 9 59282 0.0067 0.3790 -0.25558
2021 3 10 59283 0.0071 0.3809 -0.25608
2021 3 11 59284 0.0075 0.3828 -0.25675
2021 3 12 59285 0.0079 0.3847 -0.25755
2021 3 13 59286 0.0084 0.3866 -0.25847
2021 3 14 59287 0.0089 0.3885 -0.25952
2021 3 15 59288 0.0095 0.3904 -0.26070
2021 3 16 59289 0.0101 0.3923 -0.26192
2021 3 17 59290 0.0107 0.3942 -0.26306
2021 3 18 59291 0.0114 0.3960 -0.26410
2021 3 19 59292 0.0121 0.3979 -0.26500
2021 3 20 59293 0.0128 0.3997 -0.26574
2021 3 21 59294 0.0136 0.4015 -0.26641
2021 3 22 59295 0.0144 0.4034 -0.26703
2021 3 23 59296 0.0152 0.4052 -0.26769
2021 3 24 59297 0.0161 0.4070 -0.26848
2021 3 25 59298 0.0170 0.4087 -0.26943
2021 3 26 59299 0.0179 0.4105 -0.27065
2021 3 27 59300 0.0189 0.4122 -0.27216
2021 3 28 59301 0.0199 0.4140 -0.27391
2021 3 29 59302 0.0209 0.4157 -0.27581
2021 3 30 59303 0.0219 0.4174 -0.27773
2021 3 31 59304 0.0230 0.4191 -0.27947
2021 4 1 59305 0.0242 0.4207 -0.28097
2021 4 2 59306 0.0253 0.4224 -0.28222
2021 4 3 59307 0.0265 0.4240 -0.28323
2021 4 4 59308 0.0277 0.4256 -0.28404
2021 4 5 59309 0.0290 0.4272 -0.28479
2021 4 6 59310 0.0303 0.4288 -0.28557
2021 4 7 59311 0.0316 0.4304 -0.28644
2021 4 8 59312 0.0329 0.4319 -0.28744
2021 4 9 59313 0.0343 0.4334 -0.28860
2021 4 10 59314 0.0357 0.4349 -0.28990
2021 4 11 59315 0.0371 0.4364 -0.29129
2021 4 12 59316 0.0386 0.4378 -0.29267
2021 4 13 59317 0.0401 0.4393 -0.29394
2021 4 14 59318 0.0416 0.4407 -0.29508
2021 4 15 59319 0.0431 0.4420 -0.29610
2021 4 16 59320 0.0447 0.4434 -0.29691
2021 4 17 59321 0.0463 0.4447 -0.29757
2021 4 18 59322 0.0479 0.4460 -0.29812
2021 4 19 59323 0.0495 0.4473 -0.29861
2021 4 20 59324 0.0512 0.4486 -0.29915
2021 4 21 59325 0.0529 0.4498 -0.29981
2021 4 22 59326 0.0546 0.4510 -0.30068
2021 4 23 59327 0.0563 0.4522 -0.30182
2021 4 24 59328 0.0581 0.4533 -0.30324
2021 4 25 59329 0.0599 0.4544 -0.30484
2021 4 26 59330 0.0617 0.4555 -0.30650
2021 4 27 59331 0.0635 0.4566 -0.30812
2021 4 28 59332 0.0653 0.4576 -0.30956
2021 4 29 59333 0.0672 0.4586 -0.31071
2021 4 30 59334 0.0691 0.4596 -0.31164
These predictions are based on all announced leap seconds.
The recommended software to predict celestial pole offsets can be found at
<http://www.usno.navy.mil/USNO/earth-orientation/software/aux/ceppred.f>
and software for the calculation of the dX and dY components with
respect to IAU2000A Nutation/Precession Theory can be found at the
<http://maia.usno.navy.mil/conv2010/conventions.html>
web site in Chapter 5 Section 5.5 of the IERS Conventions (2010).