BULLETIN B 255 (IAU 2000) 30 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. MAR 4 54894 -0.13417 0.30972 0.357352 -33.642648 -0.23 -0.10 MAR 9 54899 -0.13280 0.32885 0.351736 -33.648264 0.08 -0.07 MAR 14 54904 -0.13087 0.34676 0.345942 -33.654058 -0.22 0.15 MAR 19 54909 -0.12730 0.36336 0.340193 -33.659807 -0.02 -0.01 MAR 24 54914 -0.12210 0.38053 0.334098 -33.665902 -0.03 0.10 MAR 29 54919 -0.11806 0.39819 0.327918 -33.672082 -0.09 0.03 APR 3 54924 -0.11646 0.41102 0.322068 -33.677932 0.10 0.00 Preliminary extension, to be updated weekly in Bulletin A and monthly in Bulletin B. APR 8 54929 -0.10688 0.42619 0.316456 -33.683544 -0.03 0.13 APR 13 54934 -0.09860 0.43958 0.309908 -33.690092 0.19 0.10 APR 18 54939 -0.08686 0.45541 0.303493 -33.696507 0.02 -0.04 APR 23 54944 -0.07696 0.46925 0.296810 -33.703190 0.02 -0.04 APR 28 54949 -0.06979 0.48010 0.290045 -33.709955 0.02 -0.04 MAY 3 54954 -0.05941 0.49145 0.283551 -33.716449 0.02 -0.05 MAY 8 54959 -0.04779 0.50077 0.277848 -33.722152 0.02 -0.05 MAY 13 54964 -0.03506 0.50949 0.272496 -33.727504 0.02 -0.05 MAY 18 54969 -0.01919 0.51823 0.267387 -33.732613 0.02 -0.05 MAY 23 54974 -0.00223 0.52573 0.262498 -33.737502 0.02 -0.05 MAY 28 54979 0.01549 0.53259 0.257910 -33.742090 0.02 -0.05 JUN 2 54984 0.03099 0.53851 0.253642 -33.746358 0.00 0.00 JUN 7 54989 0.04661 0.54286 0.249705 -33.750295 0.00 0.00 JUN 12 54994 0.06371 0.54676 0.246155 -33.753845 0.00 0.00 JUN 17 54999 0.07979 0.54777 0.242937 -33.757063 0.00 0.00 JUN 22 55004 0.09585 0.54788 0.240042 -33.759958 0.00 0.00 JUN 27 55009 0.11645 0.54618 0.237475 -33.762525 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 255 (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" MAR 4 54894 -0.13417 0.30972 0.357317 -0.035 0.794 -0.23 -0.10 MAR 5 54895 -0.13370 0.31326 0.356550 0.359 0.718 -0.20 -0.11 MAR 6 54896 -0.13345 0.31688 0.355780 0.726 0.849 -0.11 -0.11 MAR 7 54897 -0.13314 0.32077 0.354878 0.947 1.023 0.00 -0.12 MAR 8 54898 -0.13300 0.32466 0.353778 0.934 1.223 0.09 -0.11 MAR 9 54899 -0.13280 0.32885 0.352397 0.661 1.538 0.08 -0.07 MAR 10 54900 -0.13252 0.33300 0.350757 0.173 1.745 0.00 -0.02 MAR 11 54901 -0.13213 0.33680 0.349011 -0.420 1.768 -0.11 0.03 MAR 12 54902 -0.13199 0.34068 0.347287 -0.988 1.665 -0.19 0.06 MAR 13 54903 -0.13175 0.34389 0.345699 -1.412 1.483 -0.22 0.10 MAR 14 54904 -0.13087 0.34676 0.344326 -1.616 1.252 -0.22 0.15 MAR 15 54905 -0.13031 0.35019 0.343195 -1.580 1.011 -0.18 0.20 MAR 16 54906 -0.12952 0.35335 0.342276 -1.326 0.816 -0.13 0.20 MAR 17 54907 -0.12848 0.35661 0.341528 -0.907 0.633 -0.08 0.16 MAR 18 54908 -0.12773 0.35992 0.340921 -0.390 0.566 -0.04 0.08 MAR 19 54909 -0.12730 0.36336 0.340346 0.153 0.605 -0.02 -0.01 MAR 20 54910 -0.12687 0.36683 0.339699 0.650 0.682 -0.02 -0.07 MAR 21 54911 -0.12600 0.37014 0.338928 1.034 0.885 -0.02 -0.08 MAR 22 54912 -0.12490 0.37369 0.337925 1.256 1.144 -0.02 -0.05 MAR 23 54913 -0.12348 0.37688 0.336679 1.285 1.362 -0.03 0.04 MAR 24 54914 -0.12210 0.38053 0.335220 1.122 1.545 -0.03 0.10 MAR 25 54915 -0.12093 0.38439 0.333611 0.795 1.643 -0.02 0.13 MAR 26 54916 -0.11990 0.38798 0.331948 0.370 1.666 -0.01 0.12 MAR 27 54917 -0.11921 0.39159 0.330292 -0.063 1.622 -0.03 0.08 MAR 28 54918 -0.11850 0.39499 0.328718 -0.405 1.487 -0.07 0.04 MAR 29 54919 -0.11806 0.39819 0.327347 -0.571 1.254 -0.09 0.03 MAR 30 54920 -0.11840 0.40090 0.326221 -0.520 0.998 -0.05 0.08 MAR 31 54921 -0.11894 0.40361 0.325290 -0.272 0.828 0.05 0.13 APR 1 54922 -0.11885 0.40601 0.324486 0.099 0.776 0.15 0.13 APR 2 54923 -0.11779 0.40840 0.323700 0.480 0.822 0.18 0.07 APR 3 54924 -0.11646 0.41102 0.322822 0.754 0.937 0.10 0.00 APR 4 54925 -0.11517 0.41375 0.321804 0.831 1.106 -0.05 0.00 APR 5 54926 -0.11330 0.41650 0.320613 0.672 1.326 -0.18 0.07 APR 6 54927 -0.11076 0.41956 0.319164 0.298 1.577 -0.21 0.16 APR 7 54928 -0.10847 0.42314 0.317491 -0.214 1.747 -0.14 0.20 APR 8 54929 -0.10688 0.42619 0.315703 -0.753 1.774 -0.03 0.13 APR 9 54930 -0.10535 0.42889 0.313974 -1.205 1.639 0.06 0.02 APR 10 54931 -0.10373 0.43172 0.312402 -1.477 1.464 0.11 -0.06 APR 11 54932 -0.10231 0.43467 0.311022 -1.525 1.285 0.14 -0.06 APR 12 54933 -0.10071 0.43715 0.309858 -1.349 1.039 0.16 0.01 APR 13 54934 -0.09860 0.43958 0.308920 -0.988 0.812 0.19 0.10 APR 14 54935 -0.09651 0.44249 0.308155 -0.505 0.711 0.22 0.18 APR 15 54936 -0.09411 0.44567 0.307425 0.028 0.744 0.22 0.22 APR 16 54937 -0.09143 0.44920 0.306633 0.539 0.826 0.18 0.20 APR 17 54938 -0.08898 0.45247 0.305754 0.961 0.957 0.12 0.11 APR 18 54939 -0.08686 0.45541 0.304736 1.243 1.106 0.02 -0.04 APR 19 54940 -0.08483 0.45827 0.303555 1.348 1.266 0.02 -0.04 APR 20 54941 -0.08269 0.46088 0.302195 1.265 1.476 0.02 -0.04 APR 21 54942 -0.08047 0.46356 0.300605 1.008 1.689 0.02 -0.04 APR 22 54943 -0.07847 0.46638 0.298820 0.623 1.819 0.02 -0.04 APR 23 54944 -0.07696 0.46925 0.296993 0.182 1.811 0.02 -0.04 APR 24 54945 -0.07589 0.47170 0.295254 -0.216 1.692 0.02 -0.04 APR 25 54946 -0.07494 0.47388 0.293646 -0.477 1.511 0.02 -0.04 APR 26 54947 -0.07375 0.47622 0.292232 -0.533 1.292 0.02 -0.04 APR 27 54948 -0.07200 0.47818 0.291035 -0.376 1.095 0.02 -0.04 APR 28 54949 -0.06979 0.48010 0.289981 -0.064 1.015 0.02 -0.04 APR 29 54950 -0.06758 0.48232 0.288981 0.293 1.014 0.02 -0.04 APR 30 54951 -0.06520 0.48455 0.287945 0.573 1.102 0.02 -0.04 MAY 1 54952 -0.06278 0.48671 0.286709 0.676 1.279 0.02 -0.05 MAY 2 54953 -0.06097 0.48899 0.285328 0.558 1.480 0.02 -0.05 MAY 3 54954 -0.05941 0.49145 0.283788 0.236 1.644 0.02 -0.05 MAY 4 54955 -0.05751 0.49378 0.282146 -0.222 1.726 0.02 -0.05 MAY 5 54956 -0.05532 0.49582 0.280488 -0.722 1.707 0.02 -0.05 MAY 6 54957 -0.05286 0.49751 0.278910 -1.161 1.592 0.02 -0.05 MAY 7 54958 -0.05031 0.49917 0.277502 -1.452 1.406 0.02 -0.05 MAY 8 54959 -0.04779 0.50077 0.276306 -1.542 1.185 0.02 -0.05 MAY 9 54960 -0.04511 0.50218 0.275339 -1.417 0.969 0.02 -0.05 MAY 10 54961 -0.04240 0.50389 0.274571 -1.100 0.794 0.02 -0.05 MAY 11 54962 -0.04003 0.50560 0.273958 -0.645 0.680 0.02 -0.05 MAY 12 54963 -0.03766 0.50747 0.273425 -0.119 0.640 0.02 -0.05 MAY 13 54964 -0.03506 0.50949 0.272900 0.404 0.670 0.02 -0.05 MAY 14 54965 -0.03226 0.51132 0.272313 0.857 0.762 0.02 -0.05 MAY 15 54966 -0.02910 0.51331 0.271611 1.187 0.899 0.02 -0.05 MAY 16 54967 -0.02590 0.51518 0.270760 1.357 1.063 0.02 -0.05 MAY 17 54968 -0.02260 0.51667 0.269744 1.352 1.231 0.02 -0.05 MAY 18 54969 -0.01919 0.51823 0.268566 1.179 1.380 0.02 -0.05 MAY 19 54970 -0.01589 0.51996 0.267255 0.867 1.486 0.02 -0.05 MAY 20 54971 -0.01268 0.52154 0.265876 0.474 1.524 0.02 -0.05 MAY 21 54972 -0.00927 0.52302 0.264500 0.077 1.472 0.02 -0.05 MAY 22 54973 -0.00573 0.52439 0.263223 -0.232 1.329 0.02 -0.05 MAY 23 54974 -0.00223 0.52573 0.262124 -0.374 1.122 0.02 -0.05 MAY 24 54975 0.00119 0.52708 0.261247 -0.310 0.905 0.02 -0.05 MAY 25 54976 0.00474 0.52838 0.260555 -0.068 0.751 0.02 -0.05 MAY 26 54977 0.00845 0.52971 0.259961 0.258 0.715 0.02 -0.05 MAY 27 54978 0.01201 0.53113 0.259339 0.539 0.812 0.02 -0.05 MAY 28 54979 0.01549 0.53259 0.258567 0.657 1.006 0.02 -0.05 MAY 29 54980 0.01891 0.53390 0.257584 0.548 1.229 0.02 -0.05 MAY 30 54981 0.02192 0.53509 0.256391 0.220 1.409 0.02 -0.05 IERS, B 255 (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" MAR 4 54894 -0.13418 0.30970 0.357316 -.110 -.088 0.01 0.01 0.01 0.01 0.02 MAR 9 54899 -0.13281 0.32884 0.352400 0.073 -.057 0.01 0.01 0.01 0.02 0.02 MAR 14 54904 -0.13088 0.34675 0.344324 -.188 0.170 0.01 0.01 0.01 0.02 0.02 MAR 19 54909 -0.12730 0.36334 0.340356 -.066 0.001 0.01 0.01 0.01 0.02 0.02 MAR 24 54914 -0.12211 0.38050 0.335219 -.052 0.114 0.01 0.01 0.01 0.03 0.03 MAR 29 54919 -0.11806 0.39817 0.327345 -.125 0.026 0.01 0.01 0.01 0.02 0.02 APR 3 54924 -0.11646 0.41101 0.322829 0.226 0.072 0.01 0.01 0.02 0.05 0.06 APR 8 54929 -0.10689 0.42617 0.315703 -.048 0.128 0.01 0.01 0.01 0.02 0.02 APR 13 54934 -0.09861 0.43956 0.308921 - - 0.01 0.01 0.04 - 0.82 APR 18 54939 -0.08687 0.45539 0.304729 0.022 0.014 0.01 0.01 0.02 0.04 0.03 APR 23 54944 -0.07700 0.46922 0.296994 - - 0.03 0.02 0.03 - 0.77 APR 28 54949 -0.06982 0.48006 0.289979 - - 0.02 0.02 0.03 - 0.79 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) MAR 4 54894 0.00117 72.921 15048 MAR 9 54899 0.00115 15050 MAR 14 54904 0.00117 15048 MAR 19 54909 0.00114 15050 MAR 24 54914 0.00130 15037 MAR 29 54919 0.00120 15045 APR 3 54924 0.00113 15051 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