**********************************************************************
* *
* I E R S B U L L E T I N - A *
* *
* Rapid Service/Prediction of Earth Orientation *
**********************************************************************
13 April 2006 Vol. XIX No. 015
______________________________________________________________________
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
= +0.3 seconds beginning 01 January 2006 at 0000 UTC
Beginning 1 January 2006:
TAI-UTC(BIPM) = 33.000 000 seconds
**********************************************************************
* No leap second will be introduced into UTC on June 30, 2006. *
* Last positive leap second was introduced in UTC on December 2005. *
* *
* See notice at the end of this Bulletin A for more details. *
**********************************************************************
________________________________________________________________________
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
6 4 7 53832 .10431 .00005 .37165 .00007 .262203 .000011
6 4 8 53833 .10415 .00005 .37133 .00008 .261423 .000012
6 4 9 53834 .10431 .00005 .37083 .00007 .260441 .000013
6 4 10 53835 .10443 .00004 .37021 .00006 .259273 .000013
6 4 11 53836 .10408 .00004 .36941 .00006 .258033 .000013
6 4 12 53837 .10364 .00004 .36854 .00006 .256789 .000015
6 4 13 53838 .10343 .00004 .36790 .00005 .255551 .000007
_______________________________________________________________________
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 = .0480 - .1315 cos A + .1097 sin A + .1750 cos C - .0799 sin C
y = .3559 + .0981 cos A + .1240 sin A - .0799 cos C - .1750 sin C
UT1-UTC = .2738 - .00042 (MJD - 53843) - (UT2-UT1)
where A = 2*pi*(MJD-53838)/365.25 and C = 2*pi*(MJD-53838)/435.
TAI-UTC(MJD 53839) = 33.0
The accuracy may be estimated from the expressions:
S x,y = 0.00068 (MJD-53838)**0.80 S t = 0.00025 (MJD-53838)**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)
2006 4 14 53839 0.1034 0.3675 0.25437
2006 4 15 53840 0.1034 0.3670 0.25331
2006 4 16 53841 0.1035 0.3666 0.25241
2006 4 17 53842 0.1037 0.3662 0.25167
2006 4 18 53843 0.1040 0.3657 0.25110
2006 4 19 53844 0.1043 0.3652 0.25063
2006 4 20 53845 0.1046 0.3648 0.25017
2006 4 21 53846 0.1050 0.3643 0.24962
2006 4 22 53847 0.1055 0.3638 0.24884
2006 4 23 53848 0.1059 0.3633 0.24774
2006 4 24 53849 0.1064 0.3628 0.24634
2006 4 25 53850 0.1069 0.3623 0.24472
2006 4 26 53851 0.1074 0.3617 0.24305
2006 4 27 53852 0.1080 0.3612 0.24149
2006 4 28 53853 0.1085 0.3606 0.24018
2006 4 29 53854 0.1091 0.3601 0.23918
2006 4 30 53855 0.1096 0.3595 0.23849
2006 5 1 53856 0.1102 0.3589 0.23804
2006 5 2 53857 0.1108 0.3583 0.23772
2006 5 3 53858 0.1113 0.3577 0.23742
2006 5 4 53859 0.1119 0.3571 0.23707
2006 5 5 53860 0.1124 0.3565 0.23662
2006 5 6 53861 0.1130 0.3558 0.23604
2006 5 7 53862 0.1135 0.3552 0.23533
2006 5 8 53863 0.1140 0.3545 0.23452
2006 5 9 53864 0.1145 0.3538 0.23363
2006 5 10 53865 0.1150 0.3531 0.23271
2006 5 11 53866 0.1155 0.3524 0.23184
2006 5 12 53867 0.1160 0.3517 0.23108
2006 5 13 53868 0.1165 0.3510 0.23048
2006 5 14 53869 0.1169 0.3503 0.23009
2006 5 15 53870 0.1173 0.3496 0.22989
2006 5 16 53871 0.1178 0.3488 0.22981
2006 5 17 53872 0.1182 0.3481 0.22976
2006 5 18 53873 0.1186 0.3473 0.22960
2006 5 19 53874 0.1190 0.3465 0.22925
2006 5 20 53875 0.1193 0.3457 0.22863
2006 5 21 53876 0.1197 0.3449 0.22774
2006 5 22 53877 0.1200 0.3441 0.22665
2006 5 23 53878 0.1203 0.3433 0.22547
2006 5 24 53879 0.1206 0.3425 0.22437
2006 5 25 53880 0.1209 0.3416 0.22348
2006 5 26 53881 0.1212 0.3408 0.22288
2006 5 27 53882 0.1215 0.3399 0.22260
2006 5 28 53883 0.1217 0.3391 0.22257
2006 5 29 53884 0.1219 0.3382 0.22270
2006 5 30 53885 0.1221 0.3373 0.22286
2006 5 31 53886 0.1223 0.3364 0.22297
2006 6 1 53887 0.1225 0.3355 0.22298
2006 6 2 53888 0.1227 0.3346 0.22285
2006 6 3 53889 0.1229 0.3336 0.22259
2006 6 4 53890 0.1230 0.3327 0.22222
2006 6 5 53891 0.1231 0.3318 0.22177
2006 6 6 53892 0.1232 0.3308 0.22132
2006 6 7 53893 0.1233 0.3298 0.22093
2006 6 8 53894 0.1234 0.3289 0.22065
2006 6 9 53895 0.1235 0.3279 0.22055
2006 6 10 53896 0.1235 0.3269 0.22066
2006 6 11 53897 0.1236 0.3259 0.22098
2006 6 12 53898 0.1236 0.3249 0.22145
2006 6 13 53899 0.1236 0.3239 0.22198
2006 6 14 53900 0.1236 0.3229 0.22244
2006 6 15 53901 0.1236 0.3218 0.22271
2006 6 16 53902 0.1235 0.3208 0.22271
2006 6 17 53903 0.1235 0.3198 0.22245
2006 6 18 53904 0.1234 0.3187 0.22199
2006 6 19 53905 0.1234 0.3177 0.22145
2006 6 20 53906 0.1233 0.3166 0.22097
2006 6 21 53907 0.1232 0.3155 0.22069
2006 6 22 53908 0.1230 0.3144 0.22069
2006 6 23 53909 0.1229 0.3134 0.22100
2006 6 24 53910 0.1228 0.3123 0.22157
2006 6 25 53911 0.1226 0.3112 0.22232
2006 6 26 53912 0.1224 0.3101 0.22314
2006 6 27 53913 0.1222 0.3090 0.22393
2006 6 28 53914 0.1220 0.3079 0.22462
2006 6 29 53915 0.1218 0.3068 0.22515
2006 6 30 53916 0.1216 0.3056 0.22552
2006 7 1 53917 0.1213 0.3045 0.22574
2006 7 2 53918 0.1210 0.3034 0.22587
2006 7 3 53919 0.1208 0.3023 0.22595
2006 7 4 53920 0.1205 0.3011 0.22605
2006 7 5 53921 0.1201 0.3000 0.22624
2006 7 6 53922 0.1199 0.2989 0.22656
2006 7 7 53923 0.1196 0.2977 0.22706
2006 7 8 53924 0.1192 0.2966 0.22775
2006 7 9 53925 0.1188 0.2955 0.22861
2006 7 10 53926 0.1184 0.2943 0.22954
2006 7 11 53927 0.1180 0.2932 0.23043
2006 7 12 53928 0.1176 0.2920 0.23115
2006 7 13 53929 0.1172 0.2909 0.23160
2006 7 14 53930 0.1167 0.2897 0.23174
2006 7 15 53931 0.1162 0.2886 0.23163
2006 7 16 53932 0.1157 0.2874 0.23140
2006 7 17 53933 0.1152 0.2863 0.23120
2006 7 18 53934 0.1147 0.2852 0.23118
2006 7 19 53935 0.1141 0.2840 0.23144
2006 7 20 53936 0.1136 0.2829 0.23199
2006 7 21 53937 0.1130 0.2818 0.23280
2006 7 22 53938 0.1124 0.2806 0.23380
2006 7 23 53939 0.1118 0.2795 0.23487
2006 7 24 53940 0.1111 0.2784 0.23592
2006 7 25 53941 0.1105 0.2773 0.23686
2006 7 26 53942 0.1098 0.2761 0.23765
2006 7 27 53943 0.1091 0.2750 0.23826
2006 7 28 53944 0.1084 0.2739 0.23865
2006 7 29 53945 0.1077 0.2728 0.23891
2006 7 30 53946 0.1070 0.2718 0.23911
2006 7 31 53947 0.1062 0.2707 0.23929
2006 8 1 53948 0.1054 0.2696 0.23954
2006 8 2 53949 0.1046 0.2685 0.23989
2006 8 3 53950 0.1038 0.2675 0.24039
2006 8 4 53951 0.1029 0.2664 0.24106
2006 8 5 53952 0.1021 0.2654 0.24188
2006 8 6 53953 0.1012 0.2643 0.24279
2006 8 7 53954 0.1003 0.2633 0.24368
2006 8 8 53955 0.0994 0.2623 0.24443
2006 8 9 53956 0.0984 0.2613 0.24491
2006 8 10 53957 0.0975 0.2603 0.24504
2006 8 11 53958 0.0965 0.2593 0.24484
2006 8 12 53959 0.0955 0.2584 0.24442
2006 8 13 53960 0.0944 0.2574 0.24397
2006 8 14 53961 0.0934 0.2565 0.24365
2006 8 15 53962 0.0923 0.2556 0.24360
2006 8 16 53963 0.0912 0.2547 0.24386
2006 8 17 53964 0.0901 0.2538 0.24440
2006 8 18 53965 0.0890 0.2529 0.24514
2006 8 19 53966 0.0878 0.2520 0.24595
2006 8 20 53967 0.0866 0.2512 0.24675
2006 8 21 53968 0.0854 0.2503 0.24745
2006 8 22 53969 0.0842 0.2495 0.24799
2006 8 23 53970 0.0829 0.2487 0.24833
2006 8 24 53971 0.0817 0.2479 0.24849
2006 8 25 53972 0.0804 0.2472 0.24850
2006 8 26 53973 0.0791 0.2464 0.24841
2006 8 27 53974 0.0777 0.2457 0.24830
2006 8 28 53975 0.0764 0.2450 0.24821
2006 8 29 53976 0.0750 0.2443 0.24822
2006 8 30 53977 0.0736 0.2437 0.24836
2006 8 31 53978 0.0722 0.2430 0.24866
2006 9 1 53979 0.0707 0.2424 0.24909
2006 9 2 53980 0.0692 0.2418 0.24963
2006 9 3 53981 0.0677 0.2412 0.25019
2006 9 4 53982 0.0662 0.2407 0.25065
2006 9 5 53983 0.0647 0.2402 0.25087
2006 9 6 53984 0.0631 0.2397 0.25076
2006 9 7 53985 0.0615 0.2392 0.25027
2006 9 8 53986 0.0599 0.2387 0.24948
2006 9 9 53987 0.0583 0.2383 0.24854
2006 9 10 53988 0.0567 0.2379 0.24765
2006 9 11 53989 0.0550 0.2375 0.24698
2006 9 12 53990 0.0533 0.2372 0.24663
2006 9 13 53991 0.0516 0.2368 0.24661
2006 9 14 53992 0.0499 0.2365 0.24683
2006 9 15 53993 0.0481 0.2363 0.24718
2006 9 16 53994 0.0463 0.2360 0.24753
2006 9 17 53995 0.0445 0.2358 0.24779
2006 9 18 53996 0.0427 0.2356 0.24789
2006 9 19 53997 0.0409 0.2355 0.24781
2006 9 20 53998 0.0390 0.2353 0.24754
2006 9 21 53999 0.0372 0.2352 0.24711
2006 9 22 54000 0.0353 0.2352 0.24656
2006 9 23 54001 0.0334 0.2351 0.24597
2006 9 24 54002 0.0315 0.2351 0.24539
2006 9 25 54003 0.0295 0.2352 0.24489
2006 9 26 54004 0.0276 0.2352 0.24453
2006 9 27 54005 0.0256 0.2353 0.24432
2006 9 28 54006 0.0236 0.2354 0.24426
2006 9 29 54007 0.0216 0.2356 0.24432
2006 9 30 54008 0.0196 0.2358 0.24444
2006 10 1 54009 0.0175 0.2360 0.24451
2006 10 2 54010 0.0155 0.2362 0.24441
2006 10 3 54011 0.0134 0.2365 0.24403
2006 10 4 54012 0.0114 0.2368 0.24330
2006 10 5 54013 0.0093 0.2372 0.24224
2006 10 6 54014 0.0072 0.2375 0.24094
2006 10 7 54015 0.0051 0.2380 0.23960
2006 10 8 54016 0.0029 0.2384 0.23839
2006 10 9 54017 0.0008 0.2389 0.23749
2006 10 10 54018 -0.0013 0.2394 0.23694
2006 10 11 54019 -0.0035 0.2400 0.23670
2006 10 12 54020 -0.0056 0.2405 0.23668
2006 10 13 54021 -0.0078 0.2412 0.23673
2006 10 14 54022 -0.0100 0.2418 0.23673
2006 10 15 54023 -0.0121 0.2425 0.23662
2006 10 16 54024 -0.0143 0.2432 0.23635
2006 10 17 54025 -0.0165 0.2440 0.23590
2006 10 18 54026 -0.0187 0.2448 0.23529
2006 10 19 54027 -0.0209 0.2456 0.23457
2006 10 20 54028 -0.0231 0.2465 0.23379
2006 10 21 54029 -0.0253 0.2474 0.23303
2006 10 22 54030 -0.0275 0.2483 0.23235
2006 10 23 54031 -0.0297 0.2492 0.23182
2006 10 24 54032 -0.0319 0.2502 0.23147
2006 10 25 54033 -0.0341 0.2512 0.23132
2006 10 26 54034 -0.0363 0.2523 0.23132
2006 10 27 54035 -0.0385 0.2534 0.23143
2006 10 28 54036 -0.0407 0.2545 0.23154
2006 10 29 54037 -0.0429 0.2556 0.23154
2006 10 30 54038 -0.0450 0.2568 0.23133
2006 10 31 54039 -0.0472 0.2580 0.23082
2006 11 1 54040 -0.0494 0.2593 0.23000
2006 11 2 54041 -0.0515 0.2606 0.22890
2006 11 3 54042 -0.0537 0.2619 0.22767
2006 11 4 54043 -0.0558 0.2633 0.22647
2006 11 5 54044 -0.0579 0.2647 0.22548
2006 11 6 54045 -0.0601 0.2661 0.22479
2006 11 7 54046 -0.0622 0.2676 0.22442
2006 11 8 54047 -0.0642 0.2691 0.22428
2006 11 9 54048 -0.0663 0.2706 0.22423
2006 11 10 54049 -0.0684 0.2722 0.22415
2006 11 11 54050 -0.0704 0.2737 0.22391
2006 11 12 54051 -0.0724 0.2754 0.22347
2006 11 13 54052 -0.0744 0.2770 0.22281
2006 11 14 54053 -0.0764 0.2787 0.22197
2006 11 15 54054 -0.0784 0.2804 0.22100
2006 11 16 54055 -0.0803 0.2822 0.21997
2006 11 17 54056 -0.0822 0.2839 0.21896
2006 11 18 54057 -0.0841 0.2858 0.21805
2006 11 19 54058 -0.0860 0.2876 0.21731
2006 11 20 54059 -0.0878 0.2895 0.21675
2006 11 21 54060 -0.0896 0.2914 0.21635
2006 11 22 54061 -0.0914 0.2933 0.21616
2006 11 23 54062 -0.0932 0.2952 0.21608
2006 11 24 54063 -0.0949 0.2972 0.21597
2006 11 25 54064 -0.0966 0.2992 0.21576
2006 11 26 54065 -0.0983 0.3012 0.21537
2006 11 27 54066 -0.1000 0.3033 0.21478
2006 11 28 54067 -0.1016 0.3054 0.21401
2006 11 29 54068 -0.1032 0.3075 0.21307
2006 11 30 54069 -0.1047 0.3096 0.21202
2006 12 1 54070 -0.1062 0.3118 0.21096
2006 12 2 54071 -0.1077 0.3140 0.21011
2006 12 3 54072 -0.1091 0.3162 0.20964
2006 12 4 54073 -0.1105 0.3184 0.20953
2006 12 5 54074 -0.1119 0.3206 0.20972
2006 12 6 54075 -0.1132 0.3229 0.21005
2006 12 7 54076 -0.1145 0.3252 0.21035
2006 12 8 54077 -0.1157 0.3275 0.21049
2006 12 9 54078 -0.1170 0.3299 0.21044
2006 12 10 54079 -0.1181 0.3322 0.21012
2006 12 11 54080 -0.1192 0.3346 0.20966
2006 12 12 54081 -0.1203 0.3370 0.20907
2006 12 13 54082 -0.1213 0.3394 0.20837
2006 12 14 54083 -0.1223 0.3418 0.20759
2006 12 15 54084 -0.1233 0.3442 0.20687
2006 12 16 54085 -0.1242 0.3467 0.20631
2006 12 17 54086 -0.1250 0.3492 0.20591
2006 12 18 54087 -0.1258 0.3516 0.20563
2006 12 19 54088 -0.1266 0.3541 0.20542
2006 12 20 54089 -0.1273 0.3566 0.20537
2006 12 21 54090 -0.1280 0.3592 0.20536
2006 12 22 54091 -0.1286 0.3617 0.20521
2006 12 23 54092 -0.1292 0.3642 0.20486
2006 12 24 54093 -0.1297 0.3668 0.20423
2006 12 25 54094 -0.1301 0.3694 0.20328
2006 12 26 54095 -0.1305 0.3719 0.20207
2006 12 27 54096 -0.1309 0.3745 0.20076
2006 12 28 54097 -0.1312 0.3771 0.19949
2006 12 29 54098 -0.1315 0.3797 0.19839
2006 12 30 54099 -0.1317 0.3823 0.19757
2006 12 31 54100 -0.1318 0.3849 0.19707
2007 1 1 54101 -0.1319 0.3875 0.19679
2007 1 2 54102 -0.1320 0.3902 0.19665
2007 1 3 54103 -0.1320 0.3928 0.19654
2007 1 4 54104 -0.1319 0.3954 0.19639
2007 1 5 54105 -0.1318 0.3980 0.19612
2007 1 6 54106 -0.1316 0.4006 0.19566
2007 1 7 54107 -0.1314 0.4033 0.19505
2007 1 8 54108 -0.1312 0.4059 0.19432
2007 1 9 54109 -0.1308 0.4085 0.19353
2007 1 10 54110 -0.1304 0.4112 0.19276
2007 1 11 54111 -0.1300 0.4138 0.19208
2007 1 12 54112 -0.1295 0.4164 0.19158
2007 1 13 54113 -0.1290 0.4190 0.19128
2007 1 14 54114 -0.1284 0.4216 0.19123
2007 1 15 54115 -0.1277 0.4242 0.19130
2007 1 16 54116 -0.1270 0.4268 0.19149
2007 1 17 54117 -0.1262 0.4294 0.19178
2007 1 18 54118 -0.1254 0.4320 0.19203
2007 1 19 54119 -0.1245 0.4346 0.19210
2007 1 20 54120 -0.1236 0.4371 0.19193
2007 1 21 54121 -0.1226 0.4397 0.19143
2007 1 22 54122 -0.1216 0.4422 0.19062
2007 1 23 54123 -0.1205 0.4448 0.18961
2007 1 24 54124 -0.1194 0.4473 0.18856
2007 1 25 54125 -0.1182 0.4498 0.18764
2007 1 26 54126 -0.1169 0.4523 0.18700
2007 1 27 54127 -0.1156 0.4548 0.18663
2007 1 28 54128 -0.1143 0.4573 0.18653
2007 1 29 54129 -0.1129 0.4597 0.18668
2007 1 30 54130 -0.1114 0.4621 0.18697
2007 1 31 54131 -0.1099 0.4646 0.18727
2007 2 1 54132 -0.1084 0.4670 0.18746
2007 2 2 54133 -0.1068 0.4694 0.18744
2007 2 3 54134 -0.1051 0.4717 0.18717
2007 2 4 54135 -0.1034 0.4741 0.18671
2007 2 5 54136 -0.1016 0.4764 0.18611
2007 2 6 54137 -0.0998 0.4787 0.18546
2007 2 7 54138 -0.0980 0.4810 0.18479
2007 2 8 54139 -0.0961 0.4833 0.18413
2007 2 9 54140 -0.0941 0.4855 0.18352
2007 2 10 54141 -0.0922 0.4877 0.18306
2007 2 11 54142 -0.0901 0.4899 0.18277
2007 2 12 54143 -0.0880 0.4921 0.18265
2007 2 13 54144 -0.0859 0.4942 0.18263
2007 2 14 54145 -0.0837 0.4963 0.18261
2007 2 15 54146 -0.0815 0.4984 0.18248
2007 2 16 54147 -0.0793 0.5005 0.18210
2007 2 17 54148 -0.0770 0.5025 0.18139
2007 2 18 54149 -0.0746 0.5045 0.18036
2007 2 19 54150 -0.0723 0.5065 0.17912
2007 2 20 54151 -0.0698 0.5084 0.17780
2007 2 21 54152 -0.0674 0.5104 0.17657
2007 2 22 54153 -0.0649 0.5122 0.17556
2007 2 23 54154 -0.0623 0.5141 0.17482
2007 2 24 54155 -0.0598 0.5159 0.17435
2007 2 25 54156 -0.0572 0.5177 0.17415
2007 2 26 54157 -0.0545 0.5195 0.17409
2007 2 27 54158 -0.0519 0.5212 0.17400
2007 2 28 54159 -0.0491 0.5229 0.17380
2007 3 1 54160 -0.0464 0.5245 0.17345
2007 3 2 54161 -0.0436 0.5262 0.17293
2007 3 3 54162 -0.0408 0.5278 0.17229
2007 3 4 54163 -0.0380 0.5293 0.17147
2007 3 5 54164 -0.0351 0.5308 0.17053
2007 3 6 54165 -0.0322 0.5323 0.16964
2007 3 7 54166 -0.0293 0.5337 0.16886
2007 3 8 54167 -0.0264 0.5351 0.16824
2007 3 9 54168 -0.0234 0.5365 0.16779
2007 3 10 54169 -0.0204 0.5378 0.16751
2007 3 11 54170 -0.0174 0.5391 0.16741
2007 3 12 54171 -0.0143 0.5404 0.16737
2007 3 13 54172 -0.0113 0.5416 0.16729
2007 3 14 54173 -0.0082 0.5427 0.16707
2007 3 15 54174 -0.0051 0.5439 0.16660
2007 3 16 54175 -0.0019 0.5449 0.16581
2007 3 17 54176 0.0012 0.5460 0.16469
2007 3 18 54177 0.0044 0.5470 0.16319
2007 3 19 54178 0.0076 0.5479 0.16147
2007 3 20 54179 0.0108 0.5489 0.15971
2007 3 21 54180 0.0140 0.5497 0.15804
2007 3 22 54181 0.0172 0.5506 0.15665
2007 3 23 54182 0.0205 0.5513 0.15564
2007 3 24 54183 0.0237 0.5521 0.15494
2007 3 25 54184 0.0270 0.5528 0.15438
2007 3 26 54185 0.0303 0.5534 0.15388
2007 3 27 54186 0.0336 0.5540 0.15332
2007 3 28 54187 0.0369 0.5546 0.15264
2007 3 29 54188 0.0402 0.5551 0.15179
2007 3 30 54189 0.0435 0.5556 0.15081
2007 3 31 54190 0.0468 0.5560 0.14975
2007 4 1 54191 0.0502 0.5564 0.14862
2007 4 2 54192 0.0535 0.5567 0.14746
2007 4 3 54193 0.0568 0.5570 0.14633
2007 4 4 54194 0.0602 0.5572 0.14534
2007 4 5 54195 0.0635 0.5574 0.14450
2007 4 6 54196 0.0669 0.5576 0.14383
2007 4 7 54197 0.0702 0.5577 0.14331
2007 4 8 54198 0.0736 0.5577 0.14294
2007 4 9 54199 0.0769 0.5577 0.14260
2007 4 10 54200 0.0803 0.5577 0.14220
2007 4 11 54201 0.0836 0.5576 0.14167
2007 4 12 54202 0.0870 0.5574 0.14095
2007 4 13 54203 0.0903 0.5573 0.13998
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)
53819 -54.25 .34 -5.54 .16
53820 -54.08 .39 -5.70 .13
53821 -53.76 .39 -5.56 .13
53822 -53.56 .45 -5.20 .34
53823 -53.68 .46 -4.88 .34
53824 -54.05 .46 -4.80 .34
53825 -54.53 .46 -4.87 .34
IAU2000A Celestial Pole Offset Series
MJD dX error dY error
(msec. of arc)
53819 0.117 0.135 -0.475 0.160
53820 0.141 0.155 -0.434 0.130
53821 0.144 0.155 -0.379 0.130
53822 0.131 0.179 -0.383 0.340
53823 0.116 0.183 -0.403 0.340
53824 0.107 0.183 -0.426 0.340
53825 0.099 0.183 -0.424 0.340
The IERS Conventions recommended software to predict celestial pole
offsets is available at ftp://maia.usno.navy.mil/conventions/chapter5/
ceppred.f and software for the calculation of the dX and dY with
respect to IAU2000A Nutation/Precession Theory can be found at the
web site in section chapter 5.
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Important Notices - Important Notices - Important Notices
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A positive leap second was introduced in UTC on 31 December 2005.
The sequence of dates of the UTC second markers will be:
2005 December 31, 23h 59m 59s
2005 December 31, 23h 59m 60s
2006 January 1, 0h 0m 0s
The difference between UTC and the International Atomic Time (TAI) is:
from 1999 January 1, 0h UTC, to 2006 January 1 0h UTC : UTC-TAI = - 32s
from 2006 January 1, 0h UTC, until further notice : UTC-TAI = - 33s
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Important Notice - IAU 2000 Resolution Compliancy Information
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Resolutions passed at the 24th General Assembly of the International
Astronomical Union (IAU) recommend the implementation of a number of new
procedures concerning the transformation between the celestial and
terrestrial reference systems. Information regarding these procedures
is available in Chapter 5 of the IERS Conventions 2003 available at
.
With these resolutions, beginning on 1 January 2003, IERS Bulletins A and
B will publish new products in addition to those already published. These
products will include the celestial pole offsets X_obs-X_IAU2000A
and Y_obs-Y_IAU2000A where
X_obs and Y_obs are the observed X, Y coordinates of the Celestial
Intermediate Pole in the Geocentric Celestial Reference System, and
X_IAU2000A and Y_IAU2000A are the celestial pole coordinates provided by
using the IAU2000A Precession-Nutation theory.
It is expected that Celestial Pole offsets related to the IAU1980 Nutation
Theory will continue to be published through 15 January 2006. The new
celestial pole offsets related to the new IAU2000A Precession-Nutation
theory will be produced in a separate data file as well as appended to
to this file.
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Important Notice - IAU 2000 Resolution Compliancy Information
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