BULLETIN B 220 1 june 2006 Contents are described in the Explanatory Supplement available at http://hpiers.obspm.fr/eop-pc/ 1 - EARTH ORIENTATION PARAMETERS (IERS evaluation). The values in this section are samplings of section 2 given at five-day intervals. Date MJD x y UT1R-UTC UT1R-TAI dPsi dEpsilon 2006 " " s s 0.001" 0.001" (0h UTC) Final Bulletin B values. APR 4 53829 0.10406 0.37271 0.264960 -32.735040 -54.8 -5.9 APR 9 53834 0.10430 0.37085 0.259713 -32.740287 -53.4 -5.5 APR 14 53839 0.10320 0.36751 0.254824 -32.745176 -53.6 -5.2 APR 19 53844 0.10223 0.36526 0.250105 -32.749895 -53.8 -6.0 APR 24 53849 0.10564 0.36287 0.245099 -32.754901 -52.6 -6.4 APR 29 53854 0.10854 0.36124 0.239468 -32.760532 -54.3 -5.7 MAY 4 53859 0.10967 0.35802 0.233268 -32.766732 -53.3 -6.7 Preliminary extension, to be updated weekly in Bulletin A and monthly in Bulletin B. MAY 9 53864 0.10803 0.35283 0.227232 -32.772768 -53.3 -5.8 MAY 14 53869 0.10861 0.34990 0.220862 -32.779138 -54.3 -6.3 MAY 19 53874 0.11137 0.34625 0.214785 -32.785215 -53.5 -6.7 MAY 24 53879 0.11357 0.34337 0.210181 -32.789819 -54.3 -5.6 MAY 29 53884 0.11841 0.33791 0.205932 -32.794068 -55.0 -6.3 JUN 3 53889 0.12047 0.33401 0.202656 -32.797344 -54.8 -5.9 JUN 8 53894 0.12187 0.33037 0.200085 -32.799915 -55.6 -5.4 JUN 13 53899 0.12261 0.32696 0.198536 -32.801464 -56.9 -5.9 JUN 18 53904 0.12316 0.32356 0.197826 -32.802174 -56.7 -5.6 JUN 23 53909 0.12336 0.32014 0.197796 -32.802204 -57.9 -5.2 JUN 28 53914 0.12322 0.31668 0.198315 -32.801685 -58.3 -6.1 JUL 3 53919 0.12270 0.31318 0.199253 -32.800747 -59.0 -5.3 JUL 8 53924 0.12180 0.30968 0.200512 -32.799488 -60.9 -5.5 JUL 13 53929 0.12049 0.30619 0.201977 -32.798023 -60.8 -5.5 JUL 18 53934 0.11877 0.30274 0.203579 -32.796421 -62.2 -5.5 JUL 23 53939 0.11660 0.29936 0.205227 -32.794773 -63.0 -5.5 JUL 28 53944 0.11401 0.29608 0.206844 -32.793156 -62.9 -5.3 Note. In UT1R, the effects of zonal tides with periods shorter than 35 days are removed ; UT1-UT1R (smaller than 0.0025s in absolute value) should be added after quadratic interpolation of UT1R. Section 2 of this Bulletin gives the daily interpolation of x, y, UT1, duration of day, dPsi, and dEpsilon. IERS, B 220 (2) 2 - SMOOTHED VALUES OF x, y, UT1, D, DPSI, DEPSILON (IERS EVALUATION) at one-day intervals. For smoothing characteristics, see Table2 in the explanatory supplement. The reference system is described in the 2004 IERS Annual Report. 2006 MJD x y UT1-UTC UT1-UT1R D dPsi dEpsilon (0 h UTC) " " s ms ms 0.001" 0.001" APR 4 53829 0.10406 0.37271 0.263951 -1.009 0.549 -54.8 -5.9 APR 5 53830 0.10443 0.37235 0.263419 -0.461 0.536 -54.4 -6.1 APR 6 53831 0.10450 0.37190 0.262851 0.044 0.598 -54.1 -6.1 APR 7 53832 0.10428 0.37171 0.262204 0.435 0.706 -53.8 -6.0 APR 8 53833 0.10410 0.37141 0.261428 0.669 0.880 -53.6 -5.8 APR 9 53834 0.10430 0.37085 0.260443 0.730 1.084 -53.4 -5.5 APR 10 53835 0.10442 0.37034 0.259268 0.626 1.213 -53.4 -5.2 APR 11 53836 0.10403 0.36950 0.258033 0.393 1.258 -53.4 -5.1 APR 12 53837 0.10361 0.36860 0.256773 0.087 1.263 -53.4 -5.0 APR 13 53838 0.10343 0.36801 0.255532 -0.222 1.216 -53.5 -5.1 APR 14 53839 0.10320 0.36751 0.254364 -0.460 1.107 -53.6 -5.2 APR 15 53840 0.10252 0.36693 0.253338 -0.562 0.941 -53.8 -5.3 APR 16 53841 0.10193 0.36632 0.252492 -0.484 0.753 -54.0 -5.4 APR 17 53842 0.10194 0.36599 0.251828 -0.217 0.588 -54.1 -5.6 APR 18 53843 0.10207 0.36580 0.251299 0.209 0.485 -54.0 -5.8 APR 19 53844 0.10223 0.36526 0.250827 0.721 0.472 -53.8 -6.0 APR 20 53845 0.10290 0.36457 0.250316 1.213 0.561 -53.4 -6.3 APR 21 53846 0.10372 0.36413 0.249663 1.562 0.750 -53.0 -6.5 APR 22 53847 0.10438 0.36380 0.248784 1.659 1.041 -52.7 -6.6 APR 23 53848 0.10505 0.36341 0.247571 1.442 1.391 -52.5 -6.5 APR 24 53849 0.10564 0.36287 0.246019 0.920 1.675 -52.6 -6.4 APR 25 53850 0.10600 0.36234 0.244265 0.188 1.812 -52.9 -6.1 APR 26 53851 0.10623 0.36195 0.242454 -0.597 1.825 -53.3 -5.8 APR 27 53852 0.10651 0.36170 0.240672 -1.260 1.718 -53.7 -5.6 APR 28 53853 0.10732 0.36153 0.239053 -1.663 1.476 -54.1 -5.6 APR 29 53854 0.10854 0.36124 0.237726 -1.743 1.157 -54.3 -5.7 APR 30 53855 0.10945 0.36076 0.236718 -1.524 0.872 -54.2 -6.0 MAY 1 53856 0.10980 0.36018 0.235946 -1.094 0.722 -54.0 -6.4 MAY 2 53857 0.10992 0.35961 0.235234 -0.569 0.716 -53.7 -6.6 MAY 3 53858 0.10991 0.35898 0.234480 -0.057 0.792 -53.5 -6.7 MAY 4 53859 0.10967 0.35802 0.233627 0.359 0.921 -53.3 -6.7 MAY 5 53860 0.10921 0.35690 0.232627 0.627 1.041 -53.2 -6.4 MAY 6 53861 0.10878 0.35561 0.231542 0.725 1.202 -53.1 -6.2 MAY 7 53862 0.10862 0.35436 0.230229 0.658 1.350 -53.1 -6.0 MAY 8 53863 0.10834 0.35352 0.228856 0.453 1.428 -53.1 -5.8 MAY 9 53864 0.10803 0.35283 0.227391 0.159 1.492 -53.3 -5.8 MAY 10 53865 0.10777 0.35219 0.225895 -0.159 1.514 -53.5 -5.9 MAY 11 53866 0.10755 0.35181 0.224387 -0.432 1.489 -53.7 -6.0 MAY 12 53867 0.10751 0.35150 0.222939 -0.590 1.371 -54.0 -6.1 MAY 13 53868 0.10784 0.35078 0.221659 -0.580 1.229 -54.2 -6.2 MAY 14 53869 0.10861 0.34990 0.220483 -0.379 1.048 -54.3 -6.3 MAY 15 53870 0.10970 0.34919 0.219548 -0.004 0.858 -54.3 -6.4 MAY 16 53871 0.11074 0.34867 0.218737 0.479 0.760 -54.2 -6.5 MAY 17 53872 0.11111 0.34800 0.217989 0.969 0.745 -54.0 -6.5 MAY 18 53873 0.11118 0.34713 0.217208 1.346 0.834 -53.8 -6.6 MAY 19 53874 0.11137 0.34625 0.216290 1.505 1.024 -53.5 -6.7 MAY 20 53875 0.11161 0.34552 0.215149 1.381 1.249 -53.6 -6.3 MAY 21 53876 0.11194 0.34509 0.213804 0.975 1.439 -53.5 -6.2 MAY 22 53877 0.11231 0.34467 0.212305 0.353 1.565 -53.6 -6.1 MAY 23 53878 0.11286 0.34413 0.210722 -0.361 1.594 -53.9 -5.8 MAY 24 53879 0.11357 0.34337 0.209168 -1.013 1.476 -54.3 -5.6 MAY 25 53880 0.11441 0.34229 0.207810 -1.468 1.232 -54.6 -5.5 IERS, B 220 (3) 3 - NORMAL VALUES OF THE EARTH ORIENTATION PARAMETERS AT FIVE-DAY INTERVALS (IERS evaluation). Raw normal values Uncertainties 2006 MJD x y UT1-UTC dPsi dEps x y UT1 dPsi dEps (0 h UTC) " " s 0.001" 0.001" 0.0001s 0.001" APR 4 53829 0.10406 0.37273 0.263950 -54.73 -5.95 0.01 0.01 0.02 0.05 0.02 APR 9 53834 0.10430 0.37086 0.260439 -53.42 -5.51 0.02 0.02 0.01 0.07 0.03 APR 14 53839 0.10319 0.36751 0.254364 -53.64 -5.24 0.01 0.02 0.02 0.10 0.05 APR 19 53844 0.10222 0.36526 0.250827 -53.88 -6.01 0.01 0.02 0.01 0.05 0.02 APR 24 53849 0.10565 0.36287 0.246019 -52.57 -6.38 0.01 0.01 0.02 0.06 0.03 APR 29 53854 0.10854 0.36124 0.237713 -54.31 -5.69 0.02 0.02 0.02 0.11 0.06 MAY 4 53859 0.10966 0.35803 0.233622 -53.28 -6.64 0.02 0.02 0.02 0.08 0.03 MAY 9 53864 0.10803 0.35282 0.227396 -53.24 -5.83 0.01 0.01 0.02 0.05 0.03 MAY 14 53869 0.10862 0.34991 0.220477 -54.29 -6.32 0.02 0.02 0.02 0.09 0.04 MAY 19 53874 0.11136 0.34624 0.216289 -53.43 -6.74 0.01 0.01 0.02 0.07 0.04 MAY 24 53879 0.11358 0.34337 0.209166 - - 0.02 0.02 0.02 - - 4 - DURATION OF THE DAY AND ANGULAR VELOCITY OF THE EARTH (IERS evaluation). The data of this section are smoothed, with the same characteristics as UT1R in section 1. They are corrected for the effects of zonal tides with periods up to 35 days. Section 2 gives the daily interpolation of D. Date (0h UTC) DR OmegaR 2006 MJD s (microrad/s) APR 4 53829 0.00109 72.921 15054 APR 9 53834 0.00106 15057 APR 14 53839 0.00093 15068 APR 19 53844 0.00100 15062 APR 24 53849 0.00103 15060 APR 29 53854 0.00124 15042 MAY 4 53859 0.00127 15039 5 - INFORMATION ON TIME SCALES A leap second was introduced in UTC on 31 December 2005. No leap second will be introduced in UTC on 30 June 2006. All information concerning time scales : announcements of the leap seconds (Bulletin C) and of the value of DUT1 (Bulletin D) can be found in our web/ftp site : World Wide Web : http://hpiers.obspm.fr Anonymous ftp : hpiers.obspm.fr or 145.238.100.28 IERS, B 220 (4) 6 - SUMMARY OF CONTRIBUTED EARTH ORIENTATION PARAMETERS SERIES This section gives the average precision of the individual series contri- buting to the combination and their average agreement with it. The periods covered start at the beginning of the first month in Section 1 and end with the last available value in the individual series considered. The complete list of measurements is available in the electronic-mailed version of Bulletin B in section 7. Units : 0.001" for x,y , 0.0001s for UT1, 0.001" for dPsi, dEpsi. -------------------------------------------------------------------------------- EOP series Mean formal uncertainty Periods covered Weighted RMS agreement with Bulletin B -------------------------------------------------------------------------------- x y UT D dPsi dEps Data Number VLBI EOP(AUS) 1 R 1 0.10 0.09 0.04 - 0.20 0.09 14 53829.20 to 53874.27 0.15 0.16 0.09 - 0.40 0.08 EOP(BKG) 3 R 4 0.08 0.08 0.03 - 0.14 0.06 13 53829.20 to 53871.21 0.11 0.15 0.06 - 0.13 0.03 EOP(BKG) 3 R 2 - - 0.11 - - - 44 53829.79 to 53879.79 - - 0.23 - - - EOP(USNO) 5 R 1 - - 0.12 - - - 46 53829.79 to 53879.79 - - 0.18 - - - EOP(GSFC) 4 R 2 0.07 0.07 0.03 - 0.14 0.06 14 53829.20 to 53874.27 0.11 0.11 0.18 - 0.13 0.03 EOP(GSFC) 4 R 1 - - 0.12 - - - 44 53829.79 to 53879.79 - - 0.22 - - - EOP(IAA) 5 R 2 0.08 0.08 0.04 - - - 13 53829.20 to 53874.27 0.11 0.19 0.07 - - - EOP(IAA) 5 R 1 - - 0.11 - - - 44 53829.79 to 53879.79 - - 0.18 - - - EOP(SPBU) 3 R 3 0.26 0.31 0.16 - 0.07 0.03 13 53829.20 to 53871.21 0.20 0.20 0.11 - 0.16 0.06 EOP(SPBU) 2 R 1 - - 0.13 - - - 41 53829.79 to 53876.33 - - 0.19 - - - EOP(MAO) 3 R 1 0.09 0.09 0.04 - - - 13 53829.23 to 53871.21 0.12 0.19 0.08 - - - EOP(USNO) 6 R 1 0.08 0.08 0.04 - 0.17 0.07 14 53829.20 to 53874.27 0.14 0.15 0.08 - 0.10 0.07 EOP(IVS) 0 R 1 0.04 0.04 0.02 - 0.08 0.04 9 53829.00 to 53860.00 0.14 0.29 0.08 - 0.08 0.06 GPS EOP(CODE) 98 P 1 0.01 0.01 - 0.07 - - 51 53829.50 to 53879.50 0.07 0.06 - 0.24 - - EOP(EMR) 96 P 3 0.03 0.03 - 0.04 - - 51 53829.50 to 53879.50 0.08 0.06 - 0.49 - - EOP(ESOC) 96 P 1 0.01 0.01 - 0.04 - - 51 53829.50 to 53879.50 0.05 0.09 - 0.28 - - EOP(GFZ) 96 P 2 0.01 0.01 - 0.02 - - 51 53829.50 to 53879.50 0.05 0.05 - 0.32 - - EOP(IAA) 1 P 1 0.03 0.03 - 0.06 - - 51 53829.50 to 53879.50 0.14 0.25 - 0.70 - - EOP(JPL) 96 P 3 0.02 0.02 - 0.13 - - 47 53829.50 to 53875.50 0.05 0.04 - 0.50 - - EOP(NOAA) 96 P 1 0.00 0.00 - 0.02 - - 26 53829.50 to 53854.50 0.07 0.15 - 0.32 - - EOP(SIO) 96 P 1 0.02 0.02 - 0.00 - - 51 53829.50 to 53879.50 0.24 0.24 - 0.57 - - EOP(IGS F)95 P 2 0.02 0.02 0.09 0.04 - - 40 53829.50 to 53868.50 0.03 0.07 0.20 0.17 - - EOP(IGS R)96 P 2 0.04 0.04 0.19 0.06 - - 51 53829.50 to 53879.50 0.04 0.04 0.72 0.18 - - EOP(IERS) 97 P 1 0.03 0.03 0.19 0.13 - - 51 53829.50 to 53879.50 0.02 0.03 0.20 0.19 - - SLR EOP(ASI) 3 L 2 0.07 0.07 - 0.16 - - 51 53829.50 to 53879.50 0.19 0.24 - 0.49 - - EOP(DUT) 98 L 1 0.09 0.08 - - - - 45 53829.00 to 53880.00 0.46 0.34 - - - - EOP(IAA) 2 L 1 0.03 0.04 0.02 0.02 - - 52 53829.00 to 53880.00 0.18 0.25 0.22 0.13 - - EOP(MCC) 97 L 1 0.15 0.16 - 0.10 - - 52 53829.00 to 53880.00 0.18 0.16 - 0.19 - - EOP(ILRS) 5 L 1 0.06 0.06 - 0.14 - - 47 53829.50 to 53875.50 0.14 0.13 - 0.50 - - Bulletin A EOP(NEOS) 97 C 1 0.04 0.05 0.09 - - - 52 53829.00 to 53880.00 0.07 0.10 0.16 - - -