BULLETIN B 254 (IAU 2000) 1 April 2009 ============================================================================== Following IAU Conventions 2000, IERS provides new products dX, dY, celestial pole offsets with respect to the new IAU2000A Precession-Nutation theory . The present Bulletin B version includes the celestial pole offsets dX, dY: dX = X_obs - X_IAU2000A and dY = Y_obs - Y_IAU2000A where X_obs, Y_obs are the observed coordinates of the Celestial Intermediate Pole (CIP) in the Geocentric Celestial Reference System, and X_IAU2000A, Y_IAU2000A are the celestial pole coordinates provided by using the IAU2000A Precession-Nutation theory. The current Bulletin B including (dpsi,deps)_1980 will be maintained as long as necessary. For more details refer to IERS Messages 38, on IAU 2000 Resolution Compliancy Information. ============================================================================== 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 dX dY 2009 " " s s 0.001" 0.001" (0h UTC) Final Bulletin B values. FEB 2 54864 -0.10749 0.21066 0.380983 -33.619017 -0.20 -0.14 FEB 7 54869 -0.11381 0.22798 0.377247 -33.622753 -0.18 -0.08 FEB 12 54874 -0.12139 0.24415 0.372964 -33.627036 -0.25 -0.08 FEB 17 54879 -0.12863 0.26215 0.369570 -33.630430 0.08 -0.03 FEB 22 54884 -0.13420 0.27587 0.366235 -33.633765 -0.20 0.04 FEB 27 54889 -0.13361 0.29257 0.362578 -33.637422 -0.07 -0.01 MAR 4 54894 -0.13417 0.30972 0.357345 -33.642655 -0.22 -0.10 Preliminary extension, to be updated weekly in Bulletin A and monthly in Bulletin B. MAR 9 54899 -0.13280 0.32885 0.351735 -33.648265 0.14 -0.10 MAR 14 54904 -0.13089 0.34676 0.345948 -33.654052 0.02 -0.04 MAR 19 54909 -0.12725 0.36337 0.340164 -33.659836 0.02 -0.04 MAR 24 54914 -0.12211 0.38049 0.334089 -33.665911 0.02 -0.04 MAR 29 54919 -0.11805 0.39818 0.327921 -33.672079 0.02 -0.04 APR 3 54924 -0.11725 0.41217 0.322100 -33.677900 0.02 -0.05 APR 8 54929 -0.11111 0.42816 0.315954 -33.684046 0.02 -0.05 APR 13 54934 -0.10497 0.44238 0.309702 -33.690298 0.02 -0.05 APR 18 54939 -0.09814 0.45744 0.303507 -33.696493 0.02 -0.05 APR 23 54944 -0.08983 0.46986 0.297374 -33.702626 0.02 -0.05 APR 28 54949 -0.07831 0.48266 0.291327 -33.708673 0.02 -0.05 MAY 3 54954 -0.06793 0.49361 0.285453 -33.714547 0.00 0.00 MAY 8 54959 -0.05589 0.50194 0.279737 -33.720263 0.00 0.00 MAY 13 54964 -0.04447 0.50959 0.274268 -33.725732 0.00 0.00 MAY 18 54969 -0.02981 0.51795 0.269077 -33.730923 0.00 0.00 MAY 23 54974 -0.01225 0.52472 0.264158 -33.735842 0.00 0.00 MAY 28 54979 0.00452 0.53048 0.259563 -33.740437 0.00 0.00 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, dX, and dY. IERS, B 254 (2) 2 - SMOOTHED VALUES OF x, y, UT1, D, dX, dY (IERS EVALUATION) at one-day intervals. For smoothing characteristics, see Table2 in the explanatory supplement. The reference system is described in the 2007 IERS Annual Report. 2009 MJD x y UT1-UTC UT1-UT1R D dX dY (0 h UTC) " " s ms ms 0.001" 0.001" FEB 2 54864 -0.10749 0.21066 0.380714 -0.269 0.714 -0.20 -0.14 FEB 3 54865 -0.10840 0.21358 0.380043 -0.304 0.557 -0.19 -0.08 FEB 4 54866 -0.10902 0.21701 0.379507 -0.142 0.450 -0.17 -0.02 FEB 5 54867 -0.11004 0.22074 0.379066 0.174 0.423 -0.15 0.00 FEB 6 54868 -0.11167 0.22443 0.378629 0.547 0.467 -0.15 -0.02 FEB 7 54869 -0.11381 0.22798 0.378094 0.847 0.641 -0.18 -0.08 FEB 8 54870 -0.11590 0.23143 0.377335 0.952 0.896 -0.23 -0.13 FEB 9 54871 -0.11809 0.23448 0.376304 0.793 1.169 -0.29 -0.16 FEB 10 54872 -0.11973 0.23723 0.375024 0.378 1.393 -0.33 -0.16 FEB 11 54873 -0.12054 0.24042 0.373583 -0.204 1.458 -0.31 -0.13 FEB 12 54874 -0.12139 0.24415 0.372143 -0.821 1.380 -0.25 -0.08 FEB 13 54875 -0.12238 0.24776 0.370881 -1.338 1.137 -0.11 -0.05 FEB 14 54876 -0.12369 0.25126 0.369921 -1.662 0.842 0.05 -0.05 FEB 15 54877 -0.12527 0.25496 0.369211 -1.749 0.613 0.18 -0.05 FEB 16 54878 -0.12682 0.25880 0.368679 -1.604 0.422 0.17 -0.05 FEB 17 54879 -0.12863 0.26215 0.368304 -1.265 0.300 0.08 -0.03 FEB 18 54880 -0.13049 0.26510 0.368065 -0.788 0.188 -0.07 -0.01 FEB 19 54881 -0.13235 0.26800 0.367905 -0.239 0.137 -0.19 0.01 FEB 20 54882 -0.13338 0.27047 0.367770 0.307 0.182 -0.25 0.03 FEB 21 54883 -0.13371 0.27309 0.367614 0.780 0.231 -0.24 0.03 FEB 22 54884 -0.13420 0.27587 0.367353 1.118 0.344 -0.20 0.04 FEB 23 54885 -0.13382 0.27872 0.366872 1.277 0.589 -0.19 -0.01 FEB 24 54886 -0.13312 0.28218 0.366152 1.240 0.841 -0.16 -0.01 FEB 25 54887 -0.13336 0.28568 0.365217 1.020 1.002 -0.14 -0.02 FEB 26 54888 -0.13358 0.28900 0.364077 0.666 1.173 -0.10 -0.02 FEB 27 54889 -0.13361 0.29257 0.362829 0.251 1.263 -0.07 -0.01 FEB 28 54890 -0.13399 0.29622 0.361563 -0.132 1.232 -0.06 -0.01 MAR 1 54891 -0.13438 0.29986 0.360343 -0.394 1.159 -0.09 -0.02 MAR 2 54892 -0.13479 0.30332 0.359210 -0.470 1.041 -0.13 -0.05 MAR 3 54893 -0.13478 0.30639 0.358197 -0.339 0.930 -0.19 -0.08 MAR 4 54894 -0.13417 0.30972 0.357310 -0.035 0.793 -0.22 -0.10 MAR 5 54895 -0.13371 0.31326 0.356538 0.359 0.717 -0.20 -0.11 MAR 6 54896 -0.13345 0.31688 0.355776 0.726 0.847 -0.12 -0.11 MAR 7 54897 -0.13314 0.32077 0.354879 0.947 1.021 0.01 -0.11 MAR 8 54898 -0.13300 0.32466 0.353779 0.934 1.222 0.11 -0.12 MAR 9 54899 -0.13280 0.32885 0.352396 0.661 1.537 0.14 -0.10 MAR 10 54900 -0.13252 0.33300 0.350766 0.173 1.744 0.06 -0.05 MAR 11 54901 -0.13213 0.33680 0.349016 -0.420 1.770 -0.10 0.04 MAR 12 54902 -0.13199 0.34068 0.347276 -0.988 1.668 -0.25 0.13 MAR 13 54903 -0.13174 0.34389 0.345696 -1.412 1.489 -0.26 0.14 MAR 14 54904 -0.13089 0.34676 0.344332 -1.616 1.263 0.02 -0.04 MAR 15 54905 -0.13026 0.35022 0.343205 -1.580 1.013 0.02 -0.04 MAR 16 54906 -0.12951 0.35340 0.342281 -1.326 0.809 0.02 -0.04 MAR 17 54907 -0.12850 0.35663 0.341524 -0.907 0.639 0.02 -0.04 MAR 18 54908 -0.12770 0.35995 0.340894 -0.390 0.567 0.02 -0.04 MAR 19 54909 -0.12725 0.36337 0.340317 0.153 0.595 0.02 -0.04 MAR 20 54910 -0.12680 0.36680 0.339695 0.650 0.672 0.02 -0.04 MAR 21 54911 -0.12593 0.37014 0.338929 1.034 0.871 0.02 -0.04 MAR 22 54912 -0.12482 0.37367 0.337930 1.256 1.136 0.02 -0.04 MAR 23 54913 -0.12353 0.37684 0.336682 1.285 1.359 0.02 -0.04 MAR 24 54914 -0.12211 0.38049 0.335211 1.122 1.546 0.02 -0.04 MAR 25 54915 -0.12091 0.38435 0.333594 0.795 1.652 0.02 -0.04 MAR 26 54916 -0.11989 0.38801 0.331944 0.370 1.675 0.02 -0.04 MAR 27 54917 -0.11918 0.39161 0.330283 -0.063 1.633 0.02 -0.04 MAR 28 54918 -0.11854 0.39497 0.328711 -0.405 1.501 0.02 -0.04 MAR 29 54919 -0.11805 0.39818 0.327350 -0.571 1.269 0.02 -0.04 MAR 30 54920 -0.11841 0.40090 0.326253 -0.520 1.001 0.02 -0.04 MAR 31 54921 -0.11887 0.40354 0.325328 -0.272 0.890 0.02 -0.04 APR 1 54922 -0.11879 0.40627 0.324567 0.099 0.774 0.02 -0.05 APR 2 54923 -0.11818 0.40907 0.323775 0.480 0.836 0.02 -0.05 APR 3 54924 -0.11725 0.41217 0.322854 0.754 1.005 0.02 -0.05 APR 4 54925 -0.11619 0.41532 0.321722 0.831 1.241 0.02 -0.05 APR 5 54926 -0.11475 0.41859 0.320343 0.672 1.486 0.02 -0.05 APR 6 54927 -0.11328 0.42198 0.318737 0.298 1.678 0.02 -0.05 APR 7 54928 -0.11213 0.42525 0.316982 -0.214 1.771 0.02 -0.05 APR 8 54929 -0.11111 0.42816 0.315200 -0.753 1.743 0.02 -0.05 APR 9 54930 -0.10988 0.43068 0.313497 -1.205 1.608 0.02 -0.05 APR 10 54931 -0.10870 0.43321 0.311975 -1.477 1.400 0.02 -0.05 APR 11 54932 -0.10752 0.43599 0.310677 -1.525 1.169 0.02 -0.05 APR 12 54933 -0.10618 0.43904 0.309602 -1.349 0.959 0.02 -0.05 APR 13 54934 -0.10497 0.44238 0.308714 -0.988 0.802 0.02 -0.05 APR 14 54935 -0.10369 0.44585 0.307952 -0.505 0.713 0.02 -0.05 APR 15 54936 -0.10243 0.44932 0.307243 0.028 0.698 0.02 -0.05 APR 16 54937 -0.10115 0.45224 0.306514 0.539 0.754 0.02 -0.05 APR 17 54938 -0.09972 0.45485 0.305704 0.961 0.870 0.02 -0.05 APR 18 54939 -0.09814 0.45744 0.304750 1.243 1.031 0.02 -0.05 APR 19 54940 -0.09634 0.45998 0.303625 1.348 1.216 0.02 -0.05 APR 20 54941 -0.09446 0.46267 0.302312 1.265 1.400 0.02 -0.05 APR 21 54942 -0.09281 0.46511 0.300831 1.008 1.556 0.02 -0.05 APR 22 54943 -0.09143 0.46742 0.299217 0.623 1.651 0.02 -0.05 APR 23 54944 -0.08983 0.46986 0.297556 0.182 1.657 0.02 -0.05 APR 24 54945 -0.08788 0.47224 0.295939 -0.216 1.562 0.02 -0.05 APR 25 54946 -0.08593 0.47462 0.294464 -0.477 1.379 0.02 -0.05 APR 26 54947 -0.08371 0.47738 0.293196 -0.533 1.153 0.02 -0.05 APR 27 54948 -0.08101 0.48008 0.292150 -0.376 0.952 0.02 -0.05 APR 28 54949 -0.07831 0.48266 0.291263 -0.064 0.839 0.02 -0.05 APR 29 54950 -0.07603 0.48535 0.290433 0.293 0.850 0.02 -0.05 APR 30 54951 -0.07371 0.48754 0.289529 0.573 0.978 0.02 -0.05 IERS, B 254 (3) 3 - NORMAL VALUES OF THE EARTH ORIENTATION PARAMETERS AT FIVE-DAY INTERVALS (IERS evaluation). Raw normal values Uncertainties 2009 MJD x y UT1-UTC dX dY x y UT1 dX dY (0 h UTC) " " s 0.001" 0.001" 0.0001s 0.001" FEB 2 54864 -0.10750 0.21064 0.380717 -.239 -.120 0.01 0.01 0.02 0.05 0.08 FEB 7 54869 -0.11382 0.22796 0.378097 -.127 -.117 0.01 0.01 0.01 0.03 0.05 FEB 12 54874 -0.12139 0.24413 0.372141 -.222 -.096 0.01 0.01 0.01 0.03 0.04 FEB 17 54879 -0.12864 0.26213 0.368307 0.020 0.021 0.01 0.01 0.01 0.03 0.05 FEB 22 54884 -0.13421 0.27584 0.367352 -.178 0.081 0.01 0.01 0.01 0.02 0.04 FEB 27 54889 -0.13362 0.29255 0.362829 -.016 0.066 0.01 0.01 0.01 0.02 0.04 MAR 4 54894 -0.13418 0.30970 0.357310 -.092 -.079 0.01 0.01 0.01 0.01 0.04 MAR 9 54899 -0.13281 0.32884 0.352424 0.109 -.019 0.01 0.01 0.02 0.13 0.14 MAR 14 54904 -0.13090 0.34675 0.344325 0.003 -.016 0.01 0.01 0.02 0.08 0.08 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 2009 MJD s (microrad/s) FEB 2 54864 0.00059 72.921 15097 FEB 7 54869 0.00087 15074 FEB 12 54874 0.00080 15079 FEB 17 54879 0.00072 15086 FEB 22 54884 0.00060 15096 FEB 27 54889 0.00085 15075 MAR 4 54894 0.00116 15048 5 - INFORMATION ON TIME SCALES No leap second will be introduced in UTC on 30 June 2009 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