BULLETIN B 248 6 October 2008 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 2008 " " s s 0.001" 0.001" (0h UTC) Final Bulletin B values. AUG 1 54679 0.28106 0.41833 -0.453696 -33.453696 -66.7 -8.0 AUG 6 54684 0.28857 0.40135 -0.454996 -33.454996 -68.7 -7.9 AUG 11 54689 0.29238 0.38605 -0.456713 -33.456713 -69.1 -7.5 AUG 16 54694 0.29359 0.37066 -0.458346 -33.458346 -69.1 -7.7 AUG 21 54699 0.29612 0.35569 -0.459724 -33.459724 -69.9 -7.8 AUG 26 54704 0.29785 0.33954 -0.461818 -33.461818 -69.3 -8.0 AUG 31 54709 0.29863 0.32243 -0.464201 -33.464201 -69.2 -7.3 Preliminary extension, to be updated weekly in Bulletin A and monthly in Bulletin B. SEP 5 54714 0.29867 0.30358 -0.467119 -33.467119 -71.0 -7.7 SEP 10 54719 0.29689 0.28673 -0.470492 -33.470492 -69.1 -7.7 SEP 15 54724 0.29147 0.27134 -0.474863 -33.474863 -69.7 -7.4 SEP 20 54729 0.28416 0.25469 -0.480226 -33.480226 -70.7 -7.0 SEP 25 54734 0.27478 0.23766 -0.484910 -33.484910 -69.3 -7.1 SEP 30 54739 0.26652 0.22284 -0.489558 -33.489558 -69.1 -6.2 OCT 5 54744 0.25540 0.20982 -0.494413 -33.494413 -69.3 -6.7 OCT 10 54749 0.24363 0.19772 -0.498531 -33.498531 -68.1 -6.6 OCT 15 54754 0.23277 0.18556 -0.502774 -33.502774 -68.4 -6.2 OCT 20 54759 0.21903 0.17507 -0.507320 -33.507320 -67.7 -6.0 OCT 25 54764 0.20506 0.16583 -0.512114 -33.512114 -66.7 -5.8 OCT 30 54769 0.18944 0.15724 -0.517134 -33.517134 -66.9 -5.6 NOV 4 54774 0.17308 0.15006 -0.522274 -33.522274 -65.4 -5.8 NOV 9 54779 0.15612 0.14376 -0.527513 -33.527513 -65.5 -5.3 NOV 14 54784 0.13730 0.13862 -0.532841 -33.532841 -64.7 -5.3 NOV 19 54789 0.11895 0.13472 -0.538165 -33.538165 -64.9 -5.1 NOV 24 54794 0.10067 0.13271 -0.543488 -33.543488 -64.3 -4.5 NOV 29 54799 0.08198 0.13236 -0.548758 -33.548758 -64.1 -5.0 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 248 (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 2007 IERS Annual Report. 2008 MJD x y UT1-UTC UT1-UT1R D dPsi dEpsilon (0 h UTC) " " s ms ms 0.001" 0.001" AUG 1 54679 0.28106 0.41833 -0.453006 0.690 0.291 -66.7 -8.0 AUG 2 54680 0.28226 0.41510 -0.453459 0.514 0.511 -66.8 -7.8 AUG 3 54681 0.28367 0.41164 -0.454034 0.125 0.690 -66.7 -7.7 AUG 4 54682 0.28528 0.40813 -0.454832 -0.381 0.793 -66.9 -7.7 AUG 5 54683 0.28690 0.40469 -0.455632 -0.885 0.741 -67.7 -7.8 AUG 6 54684 0.28857 0.40135 -0.456278 -1.282 0.597 -68.7 -7.9 AUG 7 54685 0.28998 0.39844 -0.456774 -1.503 0.406 -69.6 -8.0 AUG 8 54686 0.29074 0.39561 -0.457133 -1.518 0.219 -69.9 -8.0 AUG 9 54687 0.29141 0.39271 -0.457260 -1.327 0.083 -69.8 -7.8 AUG 10 54688 0.29193 0.38954 -0.457238 -0.959 -0.060 -69.5 -7.6 AUG 11 54689 0.29238 0.38605 -0.457175 -0.462 -0.170 -69.1 -7.5 AUG 12 54690 0.29275 0.38273 -0.456922 0.100 -0.228 -68.9 -7.6 AUG 13 54691 0.29298 0.37940 -0.456718 0.651 -0.173 -68.8 -7.8 AUG 14 54692 0.29303 0.37641 -0.456592 1.116 -0.060 -68.9 -7.9 AUG 15 54693 0.29294 0.37346 -0.456623 1.424 0.088 -69.0 -7.9 AUG 16 54694 0.29359 0.37066 -0.456820 1.526 0.260 -69.1 -7.7 AUG 17 54695 0.29423 0.36810 -0.457137 1.400 0.433 -69.1 -7.6 AUG 18 54696 0.29446 0.36514 -0.457699 1.067 0.651 -69.2 -7.7 AUG 19 54697 0.29480 0.36191 -0.458461 0.589 0.821 -69.3 -7.8 AUG 20 54698 0.29536 0.35878 -0.459296 0.065 0.856 -69.6 -7.8 AUG 21 54699 0.29612 0.35569 -0.460115 -0.391 0.745 -69.9 -7.8 AUG 22 54700 0.29702 0.35236 -0.460801 -0.679 0.554 -70.0 -7.8 AUG 23 54701 0.29805 0.34912 -0.461259 -0.737 0.349 -70.0 -7.8 AUG 24 54702 0.29858 0.34618 -0.461498 -0.564 0.169 -69.8 -7.8 AUG 25 54703 0.29822 0.34312 -0.461576 -0.218 0.047 -69.5 -7.9 AUG 26 54704 0.29785 0.33954 -0.461624 0.194 0.076 -69.3 -8.0 AUG 27 54705 0.29807 0.33593 -0.461780 0.547 0.220 -69.2 -8.0 AUG 28 54706 0.29824 0.33265 -0.462064 0.727 0.371 -69.2 -7.9 AUG 29 54707 0.29828 0.32955 -0.462520 0.672 0.604 -69.3 -7.7 AUG 30 54708 0.29847 0.32623 -0.463338 0.383 0.874 -69.3 -7.5 AUG 31 54709 0.29863 0.32243 -0.464274 -0.073 1.015 -69.2 -7.3 SEP 1 54710 0.29868 0.31859 -0.465333 -0.588 1.041 -69.2 -7.2 SEP 2 54711 0.29891 0.31472 -0.466359 -1.047 0.968 -69.5 -7.3 SEP 3 54712 0.29921 0.31091 -0.467262 -1.356 0.794 -70.2 -7.5 SEP 4 54713 0.29909 0.30729 -0.467970 -1.462 0.588 -70.8 -7.7 SEP 5 54714 0.29867 0.30358 -0.468473 -1.353 0.390 -71.0 -7.7 SEP 6 54715 0.29827 0.29997 -0.468774 -1.049 0.230 -70.9 -7.6 SEP 7 54716 0.29789 0.29648 -0.468969 -0.594 0.124 -70.3 -7.3 SEP 8 54717 0.29755 0.29309 -0.469068 -0.049 0.120 -69.7 -7.3 SEP 9 54718 0.29728 0.28985 -0.469208 0.512 0.203 -69.2 -7.5 SEP 10 54719 0.29689 0.28673 -0.469479 1.013 0.316 -69.1 -7.7 SEP 11 54720 0.29646 0.28380 -0.469860 1.381 0.488 -69.2 -7.8 SEP 12 54721 0.29582 0.28085 -0.470483 1.558 0.768 -69.5 -7.7 SEP 13 54722 0.29448 0.27778 -0.471406 1.508 1.089 -69.8 -7.6 SEP 14 54723 0.29281 0.27462 -0.472635 1.229 1.339 -69.8 -7.5 SEP 15 54724 0.29147 0.27134 -0.474097 0.765 1.529 -69.7 -7.4 SEP 16 54725 0.29046 0.26822 -0.475704 0.206 1.619 -69.7 -7.4 SEP 17 54726 0.28940 0.26511 -0.477355 -0.328 1.569 -70.0 -7.4 SEP 18 54727 0.28786 0.26174 -0.478812 -0.716 1.370 -70.5 -7.3 SEP 19 54728 0.28599 0.25823 -0.480009 -0.870 1.087 -70.8 -7.2 SEP 20 54729 0.28416 0.25469 -0.480996 -0.770 0.842 -70.7 -7.0 SEP 21 54730 0.28225 0.25127 -0.481684 -0.463 0.645 -70.3 -7.0 SEP 22 54731 0.28024 0.24786 -0.482253 -0.053 0.564 -69.9 -7.0 SEP 23 54732 0.27836 0.24433 -0.482886 0.333 0.604 -69.6 -7.0 SEP 24 54733 0.27658 0.24095 -0.483533 0.582 0.708 -69.4 -7.0 SEP 25 54734 0.27478 0.23766 -0.484289 0.621 0.928 -69.3 -7.1 SEP 26 54735 0.27306 0.23445 -0.485379 0.435 1.165 -69.2 -7.0 SEP 27 54736 0.27136 0.23111 -0.486615 0.065 1.315 -69.0 -6.8 SEP 28 54737 0.26982 0.22794 -0.487971 -0.403 1.419 -68.9 -6.6 SEP 29 54738 0.26830 0.22537 -0.489424 -0.863 1.403 -68.9 -6.3 SEP 30 54739 0.26652 0.22284 -0.490774 -1.216 1.286 -69.1 -6.2 OCT 1 54740 0.26460 0.22028 -0.491967 -1.392 1.096 -69.4 -6.4 OCT 2 54741 0.26256 0.21779 -0.492953 -1.357 0.896 -69.8 -6.6 OCT 3 54742 0.26026 0.21528 -0.493735 -1.117 0.709 -70.0 -6.7 OCT 4 54743 0.25781 0.21264 -0.494249 -0.708 0.577 -69.8 -6.7 OCT 5 54744 0.25540 0.20982 -0.494600 -0.187 0.511 -69.3 -6.7 OCT 6 54745 0.25297 0.20720 -0.494885 0.375 0.518 -68.7 -6.7 OCT 7 54746 0.25049 0.20485 -0.495177 0.906 0.600 -68.3 -6.7 OCT 8 54747 0.24807 0.20247 -0.495567 1.331 0.750 -68.0 -6.8 OCT 9 54748 0.24578 0.20007 -0.496122 1.591 0.955 -68.0 -6.7 OCT 10 54749 0.24363 0.19772 -0.496889 1.641 1.192 -68.1 -6.6 OCT 11 54750 0.24137 0.19526 -0.497891 1.463 1.432 -68.3 -6.5 OCT 12 54751 0.23910 0.19272 -0.499117 1.074 1.632 -68.4 -6.5 OCT 13 54752 0.23710 0.19027 -0.500503 0.538 1.745 -68.5 -6.4 OCT 14 54753 0.23507 0.18787 -0.501939 -0.039 1.736 -68.4 -6.3 OCT 15 54754 0.23277 0.18556 -0.503303 -0.529 1.597 -68.4 -6.2 OCT 16 54755 0.23020 0.18339 -0.504481 -0.817 1.363 -68.3 -6.1 OCT 17 54756 0.22757 0.18132 -0.505405 -0.845 1.107 -68.2 -6.2 OCT 18 54757 0.22494 0.17922 -0.506106 -0.631 0.910 -68.0 -6.2 OCT 19 54758 0.22207 0.17706 -0.506663 -0.269 0.832 -67.9 -6.1 OCT 20 54759 0.21903 0.17507 -0.507210 0.110 0.890 -67.7 -6.0 OCT 21 54760 0.21606 0.17327 -0.507878 0.381 1.057 -67.6 -6.0 OCT 22 54761 0.21311 0.17147 -0.508746 0.461 1.278 -67.4 -6.0 OCT 23 54762 0.21030 0.16955 -0.509838 0.327 1.492 -67.2 -6.1 OCT 24 54763 0.20770 0.16768 -0.511120 0.014 1.648 -66.9 -6.0 OCT 25 54764 0.20506 0.16583 -0.512518 -0.404 1.717 -66.7 -5.8 OCT 26 54765 0.20237 0.16384 -0.513939 -0.836 1.691 -66.6 -5.6 OCT 27 54766 0.19948 0.16193 -0.515291 -1.190 1.580 -66.6 -5.4 OCT 28 54767 0.19614 0.16020 -0.516502 -1.396 1.409 -66.7 -5.3 OCT 29 54768 0.19268 0.15865 -0.517524 -1.408 1.211 -66.8 -5.4 OCT 30 54769 0.18944 0.15724 -0.518354 -1.220 1.020 -66.9 -5.6 OCT 31 54770 0.18619 0.15574 -0.519008 -0.853 0.866 -66.9 -5.9 NOV 1 54771 0.18286 0.15413 -0.519535 -0.357 0.771 -66.8 -6.0 NOV 2 54772 0.17954 0.15266 -0.520004 0.201 0.747 -66.3 -5.9 NOV 3 54773 0.17624 0.15133 -0.520489 0.750 0.796 -65.8 -5.8 NOV 4 54774 0.17308 0.15006 -0.521056 1.219 0.911 -65.4 -5.8 NOV 5 54775 0.17000 0.14882 -0.521764 1.548 1.080 -65.2 -5.8 NOV 6 54776 0.16681 0.14752 -0.522665 1.692 1.284 -65.2 -5.6 NOV 7 54777 0.16332 0.14621 -0.523778 1.627 1.502 -65.2 -5.3 NOV 8 54778 0.15971 0.14497 -0.525104 1.353 1.701 -65.3 -5.2 NOV 9 54779 0.15612 0.14376 -0.526604 0.909 1.844 -65.5 -5.3 NOV 10 54780 0.15242 0.14261 -0.528203 0.371 1.889 -65.7 -5.4 NOV 11 54781 0.14858 0.14147 -0.529785 -0.150 1.813 -65.7 -5.4 NOV 12 54782 0.14469 0.14045 -0.531236 -0.535 1.623 -65.6 -5.3 NOV 13 54783 0.14089 0.13956 -0.532464 -0.692 1.371 -65.2 -5.3 NOV 14 54784 0.13730 0.13862 -0.533441 -0.600 1.137 -64.7 -5.3 NOV 15 54785 0.13379 0.13772 -0.534226 -0.319 1.000 -64.3 -5.2 NOV 16 54786 0.13030 0.13690 -0.534949 0.027 1.005 -64.3 -4.9 NOV 17 54787 0.12668 0.13613 -0.535740 0.299 1.140 -64.6 -4.8 NOV 18 54788 0.12284 0.13540 -0.536713 0.389 1.351 -64.9 -4.9 NOV 19 54789 0.11895 0.13472 -0.537903 0.262 1.564 -64.9 -5.1 NOV 20 54790 0.11509 0.13417 -0.539285 -0.054 1.718 -64.7 -5.1 NOV 21 54791 0.11122 0.13369 -0.540774 -0.479 1.779 -64.5 -5.0 NOV 22 54792 0.10751 0.13328 -0.542280 -0.918 1.745 -64.3 -4.8 NOV 23 54793 0.10406 0.13299 -0.543708 -1.282 1.630 -64.3 -4.6 NOV 24 54794 0.10067 0.13271 -0.544994 -1.505 1.461 -64.3 -4.5 NOV 25 54795 0.09714 0.13250 -0.546095 -1.546 1.263 -64.3 -4.4 NOV 26 54796 0.09350 0.13226 -0.547001 -1.392 1.067 -64.3 -4.5 NOV 27 54797 0.08971 0.13216 -0.547720 -1.058 0.899 -64.3 -4.7 NOV 28 54798 0.08576 0.13229 -0.548299 -0.586 0.782 -64.3 -4.9 NOV 29 54799 0.08198 0.13236 -0.548793 -0.034 0.732 -64.1 -5.0 IERS, B 248 (3) 3 - NORMAL VALUES OF THE EARTH ORIENTATION PARAMETERS AT FIVE-DAY INTERVALS (IERS evaluation). Raw normal values Uncertainties 2008 MJD x y UT1-UTC dPsi dEps x y UT1 dPsi dEps (0 h UTC) " " s 0.001" 0.001" 0.0001s 0.001" AUG 1 54679 0.28106 0.41831 -0.453006 -66.90 -8.01 0.01 0.01 0.02 0.07 0.04 AUG 6 54684 0.28856 0.40133 -0.456280 -68.78 -7.89 0.02 0.02 0.02 0.07 0.04 AUG 11 54689 0.29237 0.38602 -0.457175 -69.15 -7.47 0.02 0.01 0.02 0.27 0.10 AUG 16 54694 0.29359 0.37063 -0.456810 -68.98 -7.64 0.02 0.02 0.02 0.25 0.11 AUG 21 54699 0.29611 0.35567 -0.460115 -69.85 -7.79 0.01 0.01 - 0.03 0.02 AUG 26 54704 0.29784 0.33951 -0.461623 -69.26 -8.00 0.02 0.02 0.02 0.33 0.15 AUG 31 54709 0.29862 0.32241 -0.464273 -69.21 -7.24 0.01 0.01 0.02 0.07 0.06 SEP 5 54714 0.29866 0.30355 -0.468484 -71.08 -7.71 0.01 0.01 0.01 0.04 0.03 SEP 10 54719 0.29688 0.28669 -0.469474 -68.92 -7.76 0.01 0.01 0.01 0.05 0.03 SEP 15 54724 0.29151 0.27128 -0.474082 -69.67 -7.22 0.01 0.01 0.02 0.38 0.14 SEP 20 54729 0.28416 0.25462 -0.480993 - - 0.01 0.02 0.05 - - SEP 25 54734 0.27476 0.23764 -0.484295 - - 0.01 0.02 0.05 - - SEP 30 54739 0.26657 0.22275 -0.490788 - - 0.03 0.04 0.04 - - 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 2008 MJD s (microrad/s) AUG 1 54679 0.00024 72.921 15126 AUG 6 54684 0.00028 15123 AUG 11 54689 0.00038 15115 AUG 16 54694 0.00025 15125 AUG 21 54699 0.00036 15116 AUG 26 54704 0.00048 15106 AUG 31 54709 0.00051 15103 5 - INFORMATION ON TIME SCALES A leap second will be introduced in UTC on 31 December 2008. 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 248 (4) 6 - SUMMARY OF CONTRIBUTED EARTH ORIENTATION PARAMETERS SERIES This section gives the average precision of the various series with respect to the combination 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 0.04 0.04 0.02 - 0.10 0.04 8 54683.21 to 54707.27 0.42 0.13 0.10 - 0.24 0.04 EOP(BKG) 3 R 4 0.28 0.10 0.33 - 0.22 0.09 10 54679.27 to 54707.27 0.10 0.09 0.05 - 0.11 0.04 EOP(BKG) 3 R 2 - - 0.12 - - - 30 54679.80 to 54708.33 - - 0.19 - - - EOP(USNO) 5 R 1 - - 0.22 - - - 30 54679.80 to 54708.33 - - 0.18 - - - EOP(GSFC) 8 R 4 0.05 0.05 0.02 - 0.10 0.04 9 54679.27 to 54707.27 0.07 0.06 0.06 - 0.08 0.03 EOP(GSFC) 6 R 1 - - 0.24 - - - 30 54679.80 to 54708.33 - - 0.15 - - - EOP(IAA) 5 R 2 0.05 0.05 0.02 - 0.09 0.04 8 54683.21 to 54707.27 0.04 0.06 0.04 - 0.12 0.05 EOP(IAA) 5 R 1 - - 0.14 - - - 30 54679.80 to 54708.33 - - 0.19 - - - EOP(SPBU) 3 R 3 0.05 0.05 0.02 - 0.12 0.05 8 54683.21 to 54707.27 0.10 0.09 0.03 - 0.18 0.09 EOP(MAO) 3 R 1 0.05 0.04 0.02 - 0.09 0.04 8 54683.21 to 54707.32 0.10 0.08 0.03 - 0.16 0.05 EOP(IVS) 2 R 1 0.03 0.03 0.01 - 0.07 0.02 5 54679.27 to 54707.27 0.10 0.12 0.06 - 0.08 0.03 GPS EOP(CODE) 98 P 1 0.01 0.01 - 0.07 - - 30 54679.50 to 54708.50 0.03 0.03 - 0.12 - - EOP(EMR) 96 P 3 0.03 0.03 - 0.04 - - 30 54679.50 to 54708.50 0.08 0.06 - 0.20 - - EOP(ESOC) 96 P 1 0.27 0.26 - 0.02 - - 30 54679.50 to 54708.50 0.05 0.06 - 0.09 - - EOP(GFZ) 96 P 2 0.00 0.00 - 0.01 - - 30 54679.50 to 54708.50 0.03 0.03 - 0.10 - - EOP(IAA) 1 P 1 0.03 0.04 - 0.07 - - 30 54679.50 to 54708.50 0.18 0.18 - 0.36 - - EOP(JPL) 96 P 3 0.01 0.01 - 0.06 - - 30 54679.50 to 54708.50 0.03 0.04 - 0.17 - - EOP(NOAA) 96 P 1 0.00 0.00 - 0.36 - - 30 54679.50 to 54708.50 0.11 0.08 - 0.16 - - EOP(SIO) 96 P 1 0.02 0.02 - 0.05 - - 30 54679.50 to 54708.50 0.04 0.03 - 0.15 - - EOP(IGS R)96 P 2 0.02 0.02 - 0.05 - - 30 54679.50 to 54708.50 0.04 0.04 - 0.08 - - EOP(IGS) 7 P 1 0.02 0.02 - 0.05 - - 30 54679.50 to 54708.50 0.02 0.02 - 0.06 - - SLR EOP(ASI) 3 L 2 0.08 0.08 - 0.18 - - 30 54679.50 to 54708.50 0.20 0.26 - 0.46 - - EOP(ILRS) 5 L 1 0.04 0.04 - 0.38 - - 30 54679.50 to 54708.50 0.19 0.21 - 0.21 - - EOP(IAA) 2 L 1 0.03 0.04 0.02 0.02 - - 31 54679.00 to 54709.00 0.13 0.16 0.28 0.17 - - EOP(MCC) 97 L 1 0.13 0.16 - 0.13 - - 31 54679.00 to 54709.00 0.12 0.14 - 2.82 - - Bulletin A EOP(NEOS) 97 C 1 0.03 0.03 0.05 - - - 31 54679.00 to 54709.00 0.06 0.03 0.11 - - -