********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 20 April 2006 Vol. XIX No. 016 ______________________________________________________________________ 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 14 53839 .10317 .00005 .36740 .00007 .254371 .000012 6 4 15 53840 .10254 .00004 .36687 .00006 .253389 .000012 6 4 16 53841 .10200 .00003 .36632 .00006 .252589 .000013 6 4 17 53842 .10195 .00003 .36596 .00005 .251939 .000014 6 4 18 53843 .10206 .00003 .36569 .00005 .251399 .000015 6 4 19 53844 .10227 .00002 .36521 .00005 .250918 .000015 6 4 20 53845 .10282 .00002 .36457 .00003 .250370 .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 = .0432 - .1166 cos A + .1245 sin A + .1658 cos C - .0976 sin C y = .3557 + .1123 cos A + .1110 sin A - .0976 cos C - .1658 sin C UT1-UTC = .2685 - .00042 (MJD - 53850) - (UT2-UT1) where A = 2*pi*(MJD-53845)/365.25 and C = 2*pi*(MJD-53845)/435. TAI-UTC(MJD 53846) = 33.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-53845)**0.80 S t = 0.00025 (MJD-53845)**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 21 53846 0.1035 0.3640 0.24961 2006 4 22 53847 0.1042 0.3634 0.24855 2006 4 23 53848 0.1048 0.3629 0.24714 2006 4 24 53849 0.1054 0.3624 0.24542 2006 4 25 53850 0.1060 0.3619 0.24349 2006 4 26 53851 0.1065 0.3613 0.24152 2006 4 27 53852 0.1071 0.3608 0.23973 2006 4 28 53853 0.1076 0.3603 0.23827 2006 4 29 53854 0.1082 0.3597 0.23722 2006 4 30 53855 0.1087 0.3591 0.23655 2006 5 1 53856 0.1092 0.3586 0.23616 2006 5 2 53857 0.1097 0.3580 0.23591 2006 5 3 53858 0.1102 0.3574 0.23566 2006 5 4 53859 0.1107 0.3568 0.23532 2006 5 5 53860 0.1112 0.3562 0.23485 2006 5 6 53861 0.1116 0.3555 0.23422 2006 5 7 53862 0.1121 0.3549 0.23342 2006 5 8 53863 0.1126 0.3542 0.23248 2006 5 9 53864 0.1130 0.3536 0.23145 2006 5 10 53865 0.1134 0.3529 0.23040 2006 5 11 53866 0.1138 0.3522 0.22942 2006 5 12 53867 0.1142 0.3515 0.22858 2006 5 13 53868 0.1146 0.3508 0.22794 2006 5 14 53869 0.1150 0.3501 0.22753 2006 5 15 53870 0.1154 0.3493 0.22735 2006 5 16 53871 0.1157 0.3486 0.22731 2006 5 17 53872 0.1160 0.3478 0.22732 2006 5 18 53873 0.1164 0.3471 0.22726 2006 5 19 53874 0.1167 0.3463 0.22700 2006 5 20 53875 0.1170 0.3455 0.22647 2006 5 21 53876 0.1173 0.3447 0.22566 2006 5 22 53877 0.1176 0.3439 0.22463 2006 5 23 53878 0.1178 0.3431 0.22351 2006 5 24 53879 0.1181 0.3423 0.22246 2006 5 25 53880 0.1183 0.3414 0.22163 2006 5 26 53881 0.1186 0.3406 0.22111 2006 5 27 53882 0.1188 0.3397 0.22089 2006 5 28 53883 0.1190 0.3389 0.22093 2006 5 29 53884 0.1192 0.3380 0.22112 2006 5 30 53885 0.1194 0.3371 0.22136 2006 5 31 53886 0.1195 0.3362 0.22153 2006 6 1 53887 0.1197 0.3353 0.22158 2006 6 2 53888 0.1198 0.3344 0.22147 2006 6 3 53889 0.1200 0.3335 0.22121 2006 6 4 53890 0.1201 0.3325 0.22081 2006 6 5 53891 0.1202 0.3316 0.22032 2006 6 6 53892 0.1203 0.3306 0.21981 2006 6 7 53893 0.1204 0.3297 0.21934 2006 6 8 53894 0.1205 0.3287 0.21898 2006 6 9 53895 0.1205 0.3277 0.21877 2006 6 10 53896 0.1206 0.3268 0.21878 2006 6 11 53897 0.1206 0.3258 0.21898 2006 6 12 53898 0.1206 0.3248 0.21935 2006 6 13 53899 0.1206 0.3237 0.21979 2006 6 14 53900 0.1206 0.3227 0.22018 2006 6 15 53901 0.1206 0.3217 0.22038 2006 6 16 53902 0.1205 0.3207 0.22034 2006 6 17 53903 0.1205 0.3196 0.22004 2006 6 18 53904 0.1204 0.3186 0.21955 2006 6 19 53905 0.1204 0.3175 0.21898 2006 6 20 53906 0.1203 0.3165 0.21849 2006 6 21 53907 0.1202 0.3154 0.21819 2006 6 22 53908 0.1201 0.3143 0.21817 2006 6 23 53909 0.1199 0.3133 0.21846 2006 6 24 53910 0.1198 0.3122 0.21899 2006 6 25 53911 0.1196 0.3111 0.21971 2006 6 26 53912 0.1195 0.3100 0.22048 2006 6 27 53913 0.1193 0.3089 0.22123 2006 6 28 53914 0.1191 0.3078 0.22186 2006 6 29 53915 0.1189 0.3067 0.22234 2006 6 30 53916 0.1186 0.3056 0.22265 2006 7 1 53917 0.1184 0.3044 0.22283 2006 7 2 53918 0.1181 0.3033 0.22292 2006 7 3 53919 0.1179 0.3022 0.22297 2006 7 4 53920 0.1176 0.3011 0.22305 2006 7 5 53921 0.1173 0.2999 0.22322 2006 7 6 53922 0.1170 0.2988 0.22353 2006 7 7 53923 0.1166 0.2977 0.22402 2006 7 8 53924 0.1163 0.2965 0.22471 2006 7 9 53925 0.1159 0.2954 0.22555 2006 7 10 53926 0.1155 0.2942 0.22647 2006 7 11 53927 0.1152 0.2931 0.22734 2006 7 12 53928 0.1147 0.2920 0.22804 2006 7 13 53929 0.1143 0.2908 0.22846 2006 7 14 53930 0.1139 0.2897 0.22857 2006 7 15 53931 0.1134 0.2885 0.22842 2006 7 16 53932 0.1129 0.2874 0.22816 2006 7 17 53933 0.1125 0.2862 0.22792 2006 7 18 53934 0.1119 0.2851 0.22787 2006 7 19 53935 0.1114 0.2840 0.22809 2006 7 20 53936 0.1109 0.2828 0.22860 2006 7 21 53937 0.1103 0.2817 0.22937 2006 7 22 53938 0.1097 0.2806 0.23032 2006 7 23 53939 0.1091 0.2794 0.23134 2006 7 24 53940 0.1085 0.2783 0.23234 2006 7 25 53941 0.1079 0.2772 0.23324 2006 7 26 53942 0.1072 0.2761 0.23398 2006 7 27 53943 0.1066 0.2750 0.23454 2006 7 28 53944 0.1059 0.2739 0.23494 2006 7 29 53945 0.1052 0.2728 0.23521 2006 7 30 53946 0.1045 0.2717 0.23541 2006 7 31 53947 0.1037 0.2706 0.23562 2006 8 1 53948 0.1029 0.2695 0.23588 2006 8 2 53949 0.1022 0.2685 0.23626 2006 8 3 53950 0.1014 0.2674 0.23679 2006 8 4 53951 0.1005 0.2664 0.23744 2006 8 5 53952 0.0997 0.2653 0.23823 2006 8 6 53953 0.0988 0.2643 0.23912 2006 8 7 53954 0.0979 0.2633 0.24000 2006 8 8 53955 0.0970 0.2623 0.24074 2006 8 9 53956 0.0961 0.2613 0.24121 2006 8 10 53957 0.0952 0.2603 0.24133 2006 8 11 53958 0.0942 0.2593 0.24112 2006 8 12 53959 0.0932 0.2583 0.24070 2006 8 13 53960 0.0922 0.2574 0.24025 2006 8 14 53961 0.0912 0.2564 0.23992 2006 8 15 53962 0.0901 0.2555 0.23987 2006 8 16 53963 0.0890 0.2546 0.24012 2006 8 17 53964 0.0879 0.2537 0.24065 2006 8 18 53965 0.0868 0.2528 0.24138 2006 8 19 53966 0.0857 0.2520 0.24219 2006 8 20 53967 0.0845 0.2511 0.24297 2006 8 21 53968 0.0833 0.2503 0.24366 2006 8 22 53969 0.0821 0.2495 0.24418 2006 8 23 53970 0.0809 0.2487 0.24451 2006 8 24 53971 0.0796 0.2479 0.24465 2006 8 25 53972 0.0784 0.2471 0.24464 2006 8 26 53973 0.0771 0.2464 0.24454 2006 8 27 53974 0.0757 0.2457 0.24440 2006 8 28 53975 0.0744 0.2450 0.24429 2006 8 29 53976 0.0730 0.2443 0.24428 2006 8 30 53977 0.0716 0.2436 0.24441 2006 8 31 53978 0.0702 0.2430 0.24468 2006 9 1 53979 0.0688 0.2424 0.24511 2006 9 2 53980 0.0674 0.2418 0.24563 2006 9 3 53981 0.0659 0.2412 0.24618 2006 9 4 53982 0.0644 0.2406 0.24662 2006 9 5 53983 0.0629 0.2401 0.24684 2006 9 6 53984 0.0613 0.2396 0.24672 2006 9 7 53985 0.0598 0.2391 0.24623 2006 9 8 53986 0.0582 0.2387 0.24544 2006 9 9 53987 0.0566 0.2382 0.24449 2006 9 10 53988 0.0549 0.2378 0.24360 2006 9 11 53989 0.0533 0.2375 0.24293 2006 9 12 53990 0.0516 0.2371 0.24258 2006 9 13 53991 0.0499 0.2368 0.24256 2006 9 14 53992 0.0482 0.2365 0.24277 2006 9 15 53993 0.0465 0.2362 0.24312 2006 9 16 53994 0.0448 0.2360 0.24347 2006 9 17 53995 0.0430 0.2358 0.24373 2006 9 18 53996 0.0412 0.2356 0.24383 2006 9 19 53997 0.0394 0.2354 0.24375 2006 9 20 53998 0.0376 0.2353 0.24347 2006 9 21 53999 0.0357 0.2352 0.24304 2006 9 22 54000 0.0339 0.2351 0.24249 2006 9 23 54001 0.0320 0.2351 0.24189 2006 9 24 54002 0.0301 0.2351 0.24131 2006 9 25 54003 0.0282 0.2351 0.24081 2006 9 26 54004 0.0262 0.2352 0.24045 2006 9 27 54005 0.0243 0.2353 0.24025 2006 9 28 54006 0.0223 0.2354 0.24019 2006 9 29 54007 0.0203 0.2356 0.24026 2006 9 30 54008 0.0183 0.2357 0.24037 2006 10 1 54009 0.0163 0.2360 0.24044 2006 10 2 54010 0.0143 0.2362 0.24033 2006 10 3 54011 0.0123 0.2365 0.23994 2006 10 4 54012 0.0102 0.2368 0.23920 2006 10 5 54013 0.0082 0.2372 0.23812 2006 10 6 54014 0.0061 0.2376 0.23680 2006 10 7 54015 0.0040 0.2380 0.23542 2006 10 8 54016 0.0019 0.2384 0.23418 2006 10 9 54017 -0.0002 0.2389 0.23323 2006 10 10 54018 -0.0023 0.2394 0.23262 2006 10 11 54019 -0.0044 0.2400 0.23231 2006 10 12 54020 -0.0065 0.2406 0.23220 2006 10 13 54021 -0.0087 0.2412 0.23216 2006 10 14 54022 -0.0108 0.2419 0.23207 2006 10 15 54023 -0.0129 0.2426 0.23185 2006 10 16 54024 -0.0151 0.2433 0.23146 2006 10 17 54025 -0.0172 0.2440 0.23091 2006 10 18 54026 -0.0194 0.2448 0.23020 2006 10 19 54027 -0.0216 0.2457 0.22939 2006 10 20 54028 -0.0237 0.2465 0.22854 2006 10 21 54029 -0.0259 0.2475 0.22770 2006 10 22 54030 -0.0281 0.2484 0.22695 2006 10 23 54031 -0.0302 0.2494 0.22634 2006 10 24 54032 -0.0324 0.2504 0.22590 2006 10 25 54033 -0.0346 0.2514 0.22563 2006 10 26 54034 -0.0367 0.2525 0.22549 2006 10 27 54035 -0.0389 0.2536 0.22544 2006 10 28 54036 -0.0410 0.2547 0.22538 2006 10 29 54037 -0.0432 0.2559 0.22521 2006 10 30 54038 -0.0454 0.2571 0.22484 2006 10 31 54039 -0.0476 0.2583 0.22418 2006 11 1 54040 -0.0497 0.2596 0.22322 2006 11 2 54041 -0.0519 0.2609 0.22203 2006 11 3 54042 -0.0540 0.2622 0.22072 2006 11 4 54043 -0.0561 0.2636 0.21947 2006 11 5 54044 -0.0583 0.2650 0.21846 2006 11 6 54045 -0.0604 0.2664 0.21777 2006 11 7 54046 -0.0625 0.2679 0.21743 2006 11 8 54047 -0.0645 0.2694 0.21736 2006 11 9 54048 -0.0666 0.2710 0.21744 2006 11 10 54049 -0.0686 0.2725 0.21752 2006 11 11 54050 -0.0707 0.2741 0.21750 2006 11 12 54051 -0.0727 0.2757 0.21732 2006 11 13 54052 -0.0747 0.2774 0.21697 2006 11 14 54053 -0.0766 0.2791 0.21646 2006 11 15 54054 -0.0786 0.2808 0.21585 2006 11 16 54055 -0.0805 0.2826 0.21517 2006 11 17 54056 -0.0824 0.2844 0.21449 2006 11 18 54057 -0.0843 0.2862 0.21387 2006 11 19 54058 -0.0862 0.2880 0.21338 2006 11 20 54059 -0.0880 0.2899 0.21304 2006 11 21 54060 -0.0898 0.2918 0.21288 2006 11 22 54061 -0.0916 0.2937 0.21285 2006 11 23 54062 -0.0934 0.2957 0.21289 2006 11 24 54063 -0.0951 0.2977 0.21291 2006 11 25 54064 -0.0968 0.2997 0.21280 2006 11 26 54065 -0.0985 0.3017 0.21245 2006 11 27 54066 -0.1001 0.3038 0.21180 2006 11 28 54067 -0.1017 0.3059 0.21084 2006 11 29 54068 -0.1033 0.3080 0.20963 2006 11 30 54069 -0.1048 0.3101 0.20828 2006 12 1 54070 -0.1063 0.3123 0.20695 2006 12 2 54071 -0.1078 0.3145 0.20581 2006 12 3 54072 -0.1092 0.3167 0.20497 2006 12 4 54073 -0.1106 0.3189 0.20445 2006 12 5 54074 -0.1120 0.3212 0.20419 2006 12 6 54075 -0.1133 0.3234 0.20415 2006 12 7 54076 -0.1146 0.3257 0.20415 2006 12 8 54077 -0.1158 0.3280 0.20404 2006 12 9 54078 -0.1170 0.3304 0.20376 2006 12 10 54079 -0.1182 0.3327 0.20332 2006 12 11 54080 -0.1193 0.3351 0.20277 2006 12 12 54081 -0.1203 0.3375 0.20219 2006 12 13 54082 -0.1214 0.3399 0.20162 2006 12 14 54083 -0.1224 0.3423 0.20109 2006 12 15 54084 -0.1233 0.3448 0.20060 2006 12 16 54085 -0.1242 0.3472 0.20028 2006 12 17 54086 -0.1250 0.3497 0.20023 2006 12 18 54087 -0.1258 0.3522 0.20042 2006 12 19 54088 -0.1266 0.3547 0.20079 2006 12 20 54089 -0.1273 0.3572 0.20125 2006 12 21 54090 -0.1280 0.3597 0.20169 2006 12 22 54091 -0.1286 0.3622 0.20198 2006 12 23 54092 -0.1291 0.3648 0.20205 2006 12 24 54093 -0.1296 0.3673 0.20178 2006 12 25 54094 -0.1301 0.3699 0.20123 2006 12 26 54095 -0.1305 0.3725 0.20044 2006 12 27 54096 -0.1309 0.3750 0.19945 2006 12 28 54097 -0.1312 0.3776 0.19839 2006 12 29 54098 -0.1314 0.3802 0.19745 2006 12 30 54099 -0.1316 0.3828 0.19678 2006 12 31 54100 -0.1318 0.3854 0.19640 2007 1 1 54101 -0.1319 0.3880 0.19624 2007 1 2 54102 -0.1319 0.3906 0.19617 2007 1 3 54103 -0.1319 0.3933 0.19620 2007 1 4 54104 -0.1319 0.3959 0.19618 2007 1 5 54105 -0.1317 0.3985 0.19594 2007 1 6 54106 -0.1316 0.4011 0.19550 2007 1 7 54107 -0.1314 0.4037 0.19484 2007 1 8 54108 -0.1311 0.4064 0.19400 2007 1 9 54109 -0.1307 0.4090 0.19306 2007 1 10 54110 -0.1304 0.4116 0.19213 2007 1 11 54111 -0.1299 0.4142 0.19129 2007 1 12 54112 -0.1294 0.4168 0.19060 2007 1 13 54113 -0.1289 0.4194 0.19009 2007 1 14 54114 -0.1283 0.4220 0.18977 2007 1 15 54115 -0.1276 0.4246 0.18958 2007 1 16 54116 -0.1269 0.4272 0.18946 2007 1 17 54117 -0.1261 0.4298 0.18937 2007 1 18 54118 -0.1253 0.4324 0.18926 2007 1 19 54119 -0.1245 0.4349 0.18900 2007 1 20 54120 -0.1235 0.4375 0.18847 2007 1 21 54121 -0.1225 0.4400 0.18767 2007 1 22 54122 -0.1215 0.4426 0.18660 2007 1 23 54123 -0.1204 0.4451 0.18537 2007 1 24 54124 -0.1193 0.4476 0.18414 2007 1 25 54125 -0.1181 0.4501 0.18308 2007 1 26 54126 -0.1168 0.4526 0.18232 2007 1 27 54127 -0.1155 0.4551 0.18192 2007 1 28 54128 -0.1142 0.4575 0.18187 2007 1 29 54129 -0.1128 0.4600 0.18198 2007 1 30 54130 -0.1113 0.4624 0.18217 2007 1 31 54131 -0.1098 0.4648 0.18237 2007 2 1 54132 -0.1083 0.4672 0.18244 2007 2 2 54133 -0.1067 0.4696 0.18231 2007 2 3 54134 -0.1050 0.4719 0.18198 2007 2 4 54135 -0.1033 0.4743 0.18147 2007 2 5 54136 -0.1016 0.4766 0.18081 2007 2 6 54137 -0.0998 0.4789 0.18009 2007 2 7 54138 -0.0979 0.4811 0.17938 2007 2 8 54139 -0.0960 0.4834 0.17878 2007 2 9 54140 -0.0941 0.4856 0.17834 2007 2 10 54141 -0.0921 0.4878 0.17804 2007 2 11 54142 -0.0901 0.4900 0.17790 2007 2 12 54143 -0.0880 0.4921 0.17794 2007 2 13 54144 -0.0858 0.4943 0.17812 2007 2 14 54145 -0.0837 0.4964 0.17834 2007 2 15 54146 -0.0815 0.4984 0.17846 2007 2 16 54147 -0.0792 0.5005 0.17830 2007 2 17 54148 -0.0769 0.5025 0.17777 2007 2 18 54149 -0.0746 0.5045 0.17688 2007 2 19 54150 -0.0722 0.5065 0.17571 2007 2 20 54151 -0.0698 0.5084 0.17443 2007 2 21 54152 -0.0673 0.5103 0.17316 2007 2 22 54153 -0.0648 0.5122 0.17204 2007 2 23 54154 -0.0623 0.5140 0.17117 2007 2 24 54155 -0.0597 0.5158 0.17059 2007 2 25 54156 -0.0571 0.5176 0.17026 2007 2 26 54157 -0.0545 0.5193 0.17008 2007 2 27 54158 -0.0518 0.5211 0.16992 2007 2 28 54159 -0.0491 0.5227 0.16966 2007 3 1 54160 -0.0464 0.5244 0.16924 2007 3 2 54161 -0.0436 0.5260 0.16862 2007 3 3 54162 -0.0408 0.5275 0.16779 2007 3 4 54163 -0.0380 0.5291 0.16684 2007 3 5 54164 -0.0351 0.5306 0.16587 2007 3 6 54165 -0.0322 0.5320 0.16495 2007 3 7 54166 -0.0293 0.5335 0.16410 2007 3 8 54167 -0.0263 0.5349 0.16338 2007 3 9 54168 -0.0234 0.5362 0.16276 2007 3 10 54169 -0.0204 0.5375 0.16228 2007 3 11 54170 -0.0173 0.5388 0.16198 2007 3 12 54171 -0.0143 0.5400 0.16181 2007 3 13 54172 -0.0112 0.5412 0.16164 2007 3 14 54173 -0.0081 0.5424 0.16140 2007 3 15 54174 -0.0050 0.5435 0.16100 2007 3 16 54175 -0.0019 0.5445 0.16035 2007 3 17 54176 0.0013 0.5456 0.15939 2007 3 18 54177 0.0044 0.5466 0.15808 2007 3 19 54178 0.0076 0.5475 0.15652 2007 3 20 54179 0.0108 0.5484 0.15498 2007 3 21 54180 0.0140 0.5493 0.15365 2007 3 22 54181 0.0173 0.5501 0.15266 2007 3 23 54182 0.0205 0.5509 0.15202 2007 3 24 54183 0.0238 0.5516 0.15170 2007 3 25 54184 0.0270 0.5523 0.15158 2007 3 26 54185 0.0303 0.5529 0.15148 2007 3 27 54186 0.0336 0.5535 0.15122 2007 3 28 54187 0.0369 0.5541 0.15074 2007 3 29 54188 0.0402 0.5546 0.15002 2007 3 30 54189 0.0436 0.5550 0.14909 2007 3 31 54190 0.0469 0.5554 0.14803 2007 4 1 54191 0.0502 0.5558 0.14684 2007 4 2 54192 0.0536 0.5561 0.14562 2007 4 3 54193 0.0569 0.5564 0.14443 2007 4 4 54194 0.0602 0.5566 0.14331 2007 4 5 54195 0.0636 0.5568 0.14232 2007 4 6 54196 0.0669 0.5569 0.14153 2007 4 7 54197 0.0703 0.5570 0.14093 2007 4 8 54198 0.0736 0.5571 0.14041 2007 4 9 54199 0.0770 0.5571 0.13999 2007 4 10 54200 0.0803 0.5570 0.13955 2007 4 11 54201 0.0837 0.5569 0.13901 2007 4 12 54202 0.0870 0.5568 0.13827 2007 4 13 54203 0.0904 0.5566 0.13727 2007 4 14 54204 0.0937 0.5563 0.13602 2007 4 15 54205 0.0970 0.5560 0.13451 2007 4 16 54206 0.1003 0.5557 0.13286 2007 4 17 54207 0.1037 0.5553 0.13127 2007 4 18 54208 0.1070 0.5548 0.12993 2007 4 19 54209 0.1103 0.5544 0.12893 2007 4 20 54210 0.1135 0.5538 0.12828 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) 53826 -55.15 .30 -5.00 .34 53827 -55.39 .30 -5.24 .34 53828 -55.23 .30 -5.65 .34 53829 -54.77 .22 -6.07 .34 53830 -54.30 .20 -6.25 .10 53831 -54.01 .20 -6.15 .10 53832 -53.81 .20 -5.96 .10 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 53826 0.029 0.119 -0.410 0.340 53827 0.028 0.119 -0.388 0.340 53828 0.037 0.119 -0.383 0.340 53829 0.049 0.088 -0.401 0.340 53830 0.072 0.080 -0.416 0.100 53831 0.094 0.080 -0.412 0.100 53832 0.106 0.080 -0.403 0.100 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. ************************************************************************** Important Notices - Important Notices - Important Notices ************************************************************************** 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 ************************************************************************** Important Notice - IAU 2000 Resolution Compliancy Information ************************************************************************** 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. ************************************************************************** Important Notice - IAU 2000 Resolution Compliancy Information **************************************************************************