BULLETIN B 246 1 August 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. JUN 2 54619 0.12262 0.53930 -0.428922 -33.428922 -58.4 -7.9 JUN 7 54624 0.13988 0.53384 -0.432252 -33.432252 -58.5 -8.5 JUN 12 54629 0.15708 0.52773 -0.434966 -33.434966 -59.9 -7.2 JUN 17 54634 0.17244 0.52066 -0.437463 -33.437463 -60.2 -8.4 JUN 22 54639 0.18701 0.51295 -0.439746 -33.439746 -60.5 -7.9 JUN 27 54644 0.20184 0.50586 -0.442146 -33.442146 -61.5 -8.1 JUL 2 54649 0.21360 0.49538 -0.444945 -33.444945 -62.4 -8.3 Preliminary extension, to be updated weekly in Bulletin A and monthly in Bulletin B. JUL 7 54654 0.22727 0.48550 -0.447021 -33.447021 -63.9 -8.1 JUL 12 54659 0.23879 0.47502 -0.448282 -33.448282 -65.2 -8.1 JUL 17 54664 0.25061 0.46162 -0.449224 -33.449224 -65.9 -8.9 JUL 22 54669 0.26224 0.44767 -0.450259 -33.450259 -66.5 -7.4 JUL 27 54674 0.27506 0.43241 -0.451911 -33.451911 -67.5 -7.6 AUG 1 54679 0.28113 0.41846 -0.453824 -33.453824 -67.4 -7.5 AUG 6 54684 0.28487 0.40276 -0.454808 -33.454808 -68.8 -7.5 AUG 11 54689 0.28762 0.38715 -0.455351 -33.455351 -69.0 -7.3 AUG 16 54694 0.28830 0.37153 -0.455972 -33.455972 -69.5 -7.2 AUG 21 54699 0.28944 0.35606 -0.456846 -33.456846 -70.2 -7.4 AUG 26 54704 0.28877 0.33960 -0.457990 -33.457990 -69.8 -7.6 AUG 31 54709 0.28715 0.32272 -0.459406 -33.459406 -69.5 -7.1 SEP 5 54714 0.28393 0.30665 -0.461164 -33.461164 -71.2 -7.3 SEP 10 54719 0.27884 0.29021 -0.463242 -33.463242 -69.7 -7.2 SEP 15 54724 0.27538 0.27489 -0.465675 -33.465675 -70.1 -7.0 SEP 20 54729 0.26765 0.25950 -0.468519 -33.468519 -70.7 -6.9 SEP 25 54734 0.25714 0.24434 -0.471724 -33.471724 -69.3 -7.0 SEP 30 54739 0.24553 0.23141 -0.475328 -33.475328 -69.1 -6.2 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 246 (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" JUN 2 54619 0.12262 0.53930 -0.429680 -0.759 0.814 -58.4 -7.9 JUN 3 54620 0.12563 0.53852 -0.430341 -0.697 0.564 -59.0 -8.2 JUN 4 54621 0.12904 0.53746 -0.430771 -0.423 0.369 -59.1 -8.4 JUN 5 54622 0.13281 0.53617 -0.431081 -0.064 0.300 -58.9 -8.3 JUN 6 54623 0.13646 0.53499 -0.431455 0.233 0.352 -58.7 -8.3 JUN 7 54624 0.13988 0.53384 -0.431901 0.351 0.531 -58.5 -8.5 JUN 8 54625 0.14325 0.53282 -0.432575 0.248 0.720 -58.4 -8.7 JUN 9 54626 0.14656 0.53177 -0.433306 -0.046 0.848 -58.6 -8.7 JUN 10 54627 0.15016 0.53056 -0.434258 -0.451 0.981 -59.1 -8.2 JUN 11 54628 0.15370 0.52930 -0.435271 -0.873 0.991 -59.6 -7.6 JUN 12 54629 0.15708 0.52773 -0.436192 -1.226 0.837 -59.9 -7.2 JUN 13 54630 0.16059 0.52614 -0.436914 -1.448 0.655 -59.9 -7.1 JUN 14 54631 0.16390 0.52477 -0.437499 -1.501 0.460 -59.8 -7.1 JUN 15 54632 0.16678 0.52339 -0.437824 -1.368 0.250 -59.9 -7.4 JUN 16 54633 0.16956 0.52199 -0.437990 -1.058 0.127 -60.0 -7.9 JUN 17 54634 0.17244 0.52066 -0.438064 -0.601 0.032 -60.2 -8.4 JUN 18 54635 0.17519 0.51914 -0.438024 -0.053 -0.046 -60.2 -8.7 JUN 19 54636 0.17778 0.51749 -0.437951 0.517 -0.071 -60.1 -8.7 JUN 20 54637 0.18043 0.51591 -0.437908 1.035 -0.043 -60.1 -8.3 JUN 21 54638 0.18360 0.51443 -0.437917 1.431 0.089 -60.2 -8.0 JUN 22 54639 0.18701 0.51295 -0.438095 1.651 0.289 -60.5 -7.9 JUN 23 54640 0.19028 0.51141 -0.438523 1.664 0.545 -60.8 -7.9 JUN 24 54641 0.19340 0.50996 -0.439198 1.466 0.771 -61.0 -8.0 JUN 25 54642 0.19650 0.50845 -0.440071 1.088 0.934 -61.0 -8.1 JUN 26 54643 0.19947 0.50717 -0.441034 0.594 1.030 -61.1 -8.2 JUN 27 54644 0.20184 0.50586 -0.442068 0.079 0.997 -61.5 -8.1 JUN 28 54645 0.20421 0.50407 -0.442983 -0.348 0.878 -62.2 -7.9 JUN 29 54646 0.20655 0.50214 -0.443754 -0.586 0.702 -63.1 -7.7 JUN 30 54647 0.20875 0.49991 -0.444408 -0.584 0.493 -63.5 -7.7 JUL 1 54648 0.21120 0.49756 -0.444751 -0.361 0.280 -63.2 -8.0 JUL 2 54649 0.21360 0.49538 -0.444954 -0.009 0.145 -62.4 -8.3 JUL 3 54650 0.21612 0.49331 -0.445081 0.330 0.173 -61.9 -8.4 JUL 4 54651 0.21885 0.49126 -0.445376 0.522 0.345 -62.2 -8.4 JUL 5 54652 0.22171 0.48913 -0.445846 0.484 0.543 -63.1 -8.3 JUL 6 54653 0.22467 0.48730 -0.446467 0.216 0.710 -63.8 -8.3 JUL 7 54654 0.22727 0.48550 -0.447234 -0.213 0.808 -63.9 -8.1 JUL 8 54655 0.22961 0.48332 -0.448071 -0.698 0.759 -63.6 -7.8 JUL 9 54656 0.23190 0.48117 -0.448733 -1.133 0.638 -63.3 -7.6 JUL 10 54657 0.23416 0.47924 -0.449315 -1.436 0.489 -63.5 -7.7 JUL 11 54658 0.23650 0.47733 -0.449742 -1.561 0.274 -64.2 -7.9 JUL 12 54659 0.23879 0.47502 -0.449772 -1.490 0.031 -65.2 -8.1 JUL 13 54660 0.24123 0.47252 -0.449825 -1.230 -0.170 -66.0 -8.4 JUL 14 54661 0.24337 0.46997 -0.449507 -0.810 -0.307 -66.3 -8.6 JUL 15 54662 0.24532 0.46702 -0.449188 -0.282 -0.387 -66.2 -9.0 JUL 16 54663 0.24785 0.46412 -0.448770 0.288 -0.396 -65.9 -9.1 JUL 17 54664 0.25061 0.46162 -0.448399 0.825 -0.329 -65.9 -8.9 JUL 18 54665 0.25293 0.45919 -0.448171 1.252 -0.194 -66.0 -8.2 JUL 19 54666 0.25497 0.45664 -0.448061 1.510 0.007 -66.1 -7.3 JUL 20 54667 0.25720 0.45379 -0.448193 1.559 0.273 -66.1 -7.2 JUL 21 54668 0.25965 0.45090 -0.448592 1.394 0.515 -66.3 -7.3 JUL 22 54669 0.26224 0.44767 -0.449215 1.044 0.678 -66.5 -7.4 JUL 23 54670 0.26509 0.44416 -0.449939 0.575 0.750 -66.7 -7.5 JUL 24 54671 0.26778 0.44071 -0.450702 0.083 0.761 -66.9 -7.6 JUL 25 54672 0.27030 0.43739 -0.451455 -0.331 0.706 -67.0 -7.6 JUL 26 54673 0.27286 0.43479 -0.452103 -0.576 0.549 -67.2 -7.6 JUL 27 54674 0.27506 0.43241 -0.452507 -0.597 0.326 -67.5 -7.6 JUL 28 54675 0.27676 0.42965 -0.452693 -0.397 0.101 -67.6 -7.7 JUL 29 54676 0.27825 0.42683 -0.452730 -0.047 -0.001 -67.5 -7.8 JUL 30 54677 0.27946 0.42413 -0.452737 0.337 0.035 -67.4 -7.9 JUL 31 54678 0.28032 0.42134 -0.452809 0.618 0.119 -67.3 -7.7 AUG 1 54679 0.28113 0.41846 -0.453134 0.690 0.356 -67.4 -7.5 AUG 2 54680 0.28191 0.41546 -0.453605 0.514 0.568 -67.4 -7.4 AUG 3 54681 0.28254 0.41237 -0.454221 0.125 0.722 -67.4 -7.4 AUG 4 54682 0.28318 0.40919 -0.454909 -0.381 0.770 -67.5 -7.4 AUG 5 54683 0.28404 0.40587 -0.455565 -0.885 0.708 -68.0 -7.4 AUG 6 54684 0.28487 0.40276 -0.456090 -1.282 0.561 -68.8 -7.5 AUG 7 54685 0.28562 0.39988 -0.456430 -1.503 0.366 -69.4 -7.5 AUG 8 54686 0.28624 0.39694 -0.456555 -1.518 0.160 -69.5 -7.6 AUG 9 54687 0.28678 0.39377 -0.456470 -1.327 -0.028 -69.4 -7.5 AUG 10 54688 0.28732 0.39048 -0.456206 -0.959 -0.178 -69.1 -7.4 AUG 11 54689 0.28762 0.38715 -0.455813 -0.462 -0.270 -69.0 -7.3 AUG 12 54690 0.28779 0.38389 -0.455364 0.100 -0.290 -69.0 -7.3 AUG 13 54691 0.28806 0.38090 -0.454928 0.651 -0.232 -69.1 -7.4 AUG 14 54692 0.28817 0.37788 -0.454587 1.116 -0.098 -69.3 -7.5 AUG 15 54693 0.28810 0.37467 -0.454406 1.424 0.098 -69.4 -7.4 AUG 16 54694 0.28830 0.37153 -0.454446 1.526 0.332 -69.5 -7.2 AUG 17 54695 0.28879 0.36846 -0.454722 1.400 0.568 -69.4 -7.2 AUG 18 54696 0.28923 0.36536 -0.455220 1.067 0.763 -69.5 -7.2 AUG 19 54697 0.28938 0.36223 -0.455871 0.589 0.876 -69.6 -7.3 AUG 20 54698 0.28936 0.35913 -0.456579 0.065 0.877 -69.9 -7.3 AUG 21 54699 0.28944 0.35606 -0.457237 -0.391 0.766 -70.2 -7.4 AUG 22 54700 0.28951 0.35297 -0.457734 -0.679 0.568 -70.3 -7.4 AUG 23 54701 0.28933 0.34985 -0.458012 -0.737 0.337 -70.3 -7.4 AUG 24 54702 0.28908 0.34654 -0.458068 -0.564 0.135 -70.2 -7.4 AUG 25 54703 0.28895 0.34307 -0.457959 -0.218 0.018 -70.0 -7.5 AUG 26 54704 0.28877 0.33960 -0.457796 0.194 0.024 -69.8 -7.6 AUG 27 54705 0.28856 0.33606 -0.457701 0.547 0.156 -69.6 -7.6 AUG 28 54706 0.28838 0.33250 -0.457792 0.727 0.382 -69.6 -7.6 AUG 29 54707 0.28802 0.32911 -0.458129 0.672 0.642 -69.6 -7.5 AUG 30 54708 0.28754 0.32590 -0.458714 0.383 0.865 -69.6 -7.3 AUG 31 54709 0.28715 0.32272 -0.459480 -0.073 0.995 -69.5 -7.1 SEP 1 54710 0.28675 0.31965 -0.460322 -0.588 1.009 -69.5 -7.0 SEP 2 54711 0.28629 0.31664 -0.461118 -1.047 0.913 -69.9 -7.0 SEP 3 54712 0.28579 0.31345 -0.461777 -1.356 0.743 -70.4 -7.1 SEP 4 54713 0.28497 0.31008 -0.462250 -1.462 0.540 -71.0 -7.2 SEP 5 54714 0.28393 0.30665 -0.462518 -1.353 0.342 -71.2 -7.3 SEP 6 54715 0.28286 0.30323 -0.462604 -1.049 0.177 -71.1 -7.2 SEP 7 54716 0.28174 0.29993 -0.462553 -0.594 0.066 -70.6 -7.1 SEP 8 54717 0.28063 0.29675 -0.462422 -0.049 0.024 -70.2 -7.0 SEP 9 54718 0.27965 0.29344 -0.462289 0.512 0.059 -69.8 -7.1 SEP 10 54719 0.27884 0.29021 -0.462229 1.013 0.170 -69.7 -7.2 SEP 11 54720 0.27817 0.28726 -0.462312 1.381 0.349 -69.8 -7.3 SEP 12 54721 0.27763 0.28423 -0.462606 1.558 0.578 -70.0 -7.2 SEP 13 54722 0.27707 0.28111 -0.463145 1.508 0.828 -70.1 -7.1 SEP 14 54723 0.27633 0.27803 -0.463925 1.229 1.059 -70.2 -7.1 SEP 15 54724 0.27538 0.27489 -0.464909 0.765 1.223 -70.1 -7.0 SEP 16 54725 0.27435 0.27171 -0.466004 0.206 1.278 -70.2 -6.9 SEP 17 54726 0.27315 0.26855 -0.467090 -0.328 1.205 -70.4 -6.8 SEP 18 54727 0.27168 0.26548 -0.468047 -0.716 1.021 -70.6 -6.8 SEP 19 54728 0.26978 0.26245 -0.468789 -0.870 0.778 -70.8 -6.9 SEP 20 54729 0.26765 0.25950 -0.469288 -0.770 0.549 -70.7 -6.9 SEP 21 54730 0.26555 0.25649 -0.469596 -0.463 0.401 -70.4 -6.9 SEP 22 54731 0.26344 0.25327 -0.469814 -0.053 0.374 -70.0 -6.9 SEP 23 54732 0.26137 0.25012 -0.470066 0.333 0.473 -69.6 -6.9 SEP 24 54733 0.25931 0.24721 -0.470471 0.582 0.670 -69.5 -7.0 SEP 25 54734 0.25714 0.24434 -0.471103 0.621 0.913 -69.3 -7.0 SEP 26 54735 0.25480 0.24161 -0.471977 0.435 1.142 -69.2 -7.0 SEP 27 54736 0.25244 0.23900 -0.473052 0.065 1.304 -69.0 -6.8 SEP 28 54737 0.25014 0.23637 -0.474240 -0.403 1.365 -68.9 -6.5 SEP 29 54738 0.24780 0.23386 -0.475438 -0.863 1.320 -69.0 -6.3 SEP 30 54739 0.24553 0.23141 -0.476544 -1.216 1.186 -69.1 -6.2 IERS, B 246 (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" JUN 2 54619 0.12261 0.53929 -0.429671 -58.51 -7.90 0.01 0.01 0.01 0.03 0.02 JUN 7 54624 0.13988 0.53382 -0.431893 -58.42 -8.35 0.01 0.01 0.01 0.09 0.07 JUN 12 54629 0.15707 0.52771 -0.436188 -59.66 -7.21 0.01 0.01 0.01 0.06 0.05 JUN 17 54634 0.17244 0.52064 -0.438061 -60.17 -8.47 0.01 0.01 0.01 0.04 0.02 JUN 22 54639 0.18701 0.51294 -0.438093 -60.56 -7.84 0.01 0.01 0.01 0.04 0.03 JUN 27 54644 0.20183 0.50584 -0.442071 -61.48 -8.35 0.01 0.01 0.01 0.13 0.09 JUL 2 54649 0.21360 0.49537 -0.444949 -62.48 -8.25 0.01 0.01 0.02 0.06 0.04 JUL 7 54654 0.22726 0.48549 -0.447234 -64.00 -8.07 0.01 0.01 0.02 0.07 0.04 JUL 12 54659 0.23879 0.47500 -0.449799 -65.23 -8.14 0.01 0.01 0.02 0.06 0.05 JUL 17 54664 0.25060 0.46159 -0.448400 - - 0.01 0.01 0.03 - - 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) JUN 2 54619 0.00075 72.921 15084 JUN 7 54624 0.00054 15101 JUN 12 54629 0.00055 15101 JUN 17 54634 0.00055 15100 JUN 22 54639 0.00041 15112 JUN 27 54644 0.00051 15103 JUL 2 54649 0.00052 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 246 (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 0.08 0.08 0.03 - 0.15 0.07 9 54620.21 to 54648.21 0.51 0.17 0.12 - 0.17 0.09 EOP(BKG) 3 R 4 0.10 0.09 0.06 - 0.18 0.07 10 54620.21 to 54648.21 0.15 0.10 0.04 - 0.23 0.06 EOP(BKG) 3 R 2 - - 0.11 - - - 34 54619.31 to 54648.79 - - 0.18 - - - EOP(USNO) 5 R 1 - - 0.15 - - - 34 54619.31 to 54648.79 - - 0.15 - - - EOP(GSFC) 6 R 1 - - 0.15 - - - 10 54619.31 to 54626.79 - - 0.22 - - - EOP(IAA) 5 R 2 0.07 0.07 0.03 - 0.12 0.05 9 54620.21 to 54648.21 0.10 0.20 0.05 - 0.18 0.05 EOP(IAA) 5 R 1 - - 0.11 - - - 33 54619.79 to 54648.79 - - 0.21 - - - EOP(MAO) 3 R 1 0.08 0.07 0.03 - 0.13 0.06 9 54620.22 to 54648.21 0.14 0.17 0.07 - 0.27 0.11 EOP(IVS) 2 R 1 0.03 0.02 0.01 - 0.06 0.02 9 54620.21 to 54648.21 0.12 0.14 0.04 - 0.14 0.05 GPS EOP(CODE) 98 P 1 0.01 0.01 - 0.06 - - 30 54619.50 to 54648.50 0.04 0.04 - 0.12 - - EOP(EMR) 96 P 3 0.03 0.03 - 0.04 - - 30 54619.50 to 54648.50 0.05 0.10 - 0.33 - - EOP(ESOC) 96 P 1 0.26 0.26 - 0.02 - - 30 54619.50 to 54648.50 0.03 0.03 - 0.30 - - EOP(GFZ) 96 P 2 0.00 0.00 - 0.01 - - 30 54619.50 to 54648.50 0.04 0.02 - 0.10 - - EOP(IAA) 1 P 1 0.03 0.03 - 0.07 - - 30 54619.50 to 54648.50 0.23 0.16 - 0.23 - - EOP(JPL) 96 P 3 0.01 0.01 - 0.05 - - 30 54619.50 to 54648.50 0.06 0.15 - 0.19 - - EOP(NOAA) 96 P 1 0.00 0.00 - 0.39 - - 30 54619.50 to 54648.50 0.07 0.09 - 0.19 - - EOP(SIO) 96 P 1 0.02 0.02 - 0.05 - - 30 54619.50 to 54648.50 0.03 0.04 - 0.18 - - EOP(IGS R)96 P 2 0.02 0.02 0.16 0.04 - - 30 54619.50 to 54648.50 0.04 0.03 0.51 0.08 - - EOP(IGS) 7 P 1 0.02 0.02 - 0.05 - - 30 54619.50 to 54648.50 0.02 0.01 - 0.07 - - SLR EOP(ASI) 3 L 2 0.09 0.08 - 0.18 - - 30 54619.50 to 54648.50 0.26 0.22 - 0.55 - - EOP(ILRS) 5 L 1 0.05 0.05 - 0.50 - - 30 54619.50 to 54648.50 0.27 0.17 - 0.42 - - EOP(IAA) 2 L 1 0.04 0.04 0.02 0.02 - - 31 54619.00 to 54649.00 0.16 0.15 0.30 0.24 - - EOP(MCC) 97 L 1 0.17 0.16 - 0.23 - - 29 54619.00 to 54649.00 0.19 0.12 - 2.60 - - Bulletin A EOP(NEOS) 97 C 1 0.03 0.04 0.04 - - - 31 54619.00 to 54649.00 0.05 0.09 0.13 - - -