BULLETIN B 242 3 april 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. FEB 3 54499 -0.11986 0.33563 -0.304321 -33.304321 -59.0 -3.6 FEB 8 54504 -0.12286 0.34949 -0.309870 -33.309870 -58.8 -3.8 FEB 13 54509 -0.12612 0.36195 -0.315141 -33.315141 -60.4 -3.7 FEB 18 54514 -0.12646 0.37395 -0.320501 -33.320501 -59.2 -4.6 FEB 23 54519 -0.12745 0.38788 -0.325306 -33.325306 -57.9 -4.2 FEB 28 54524 -0.12417 0.40166 -0.329829 -33.329829 -59.0 -4.6 MAR 4 54529 -0.11813 0.41593 -0.333868 -33.333868 -57.9 -5.7 Preliminary extension, to be updated weekly in Bulletin A and monthly in Bulletin B. MAR 9 54534 -0.11192 0.42939 -0.338240 -33.338240 -58.3 -4.8 MAR 14 54539 -0.10486 0.44327 -0.342701 -33.342701 -58.9 -6.0 MAR 19 54544 -0.09410 0.45792 -0.347322 -33.347322 -58.0 -6.5 MAR 24 54549 -0.08072 0.47313 -0.352837 -33.352837 -57.7 -6.3 MAR 29 54554 -0.07060 0.48493 -0.359230 -33.359230 -57.5 -7.0 APR 3 54559 -0.05992 0.49347 -0.365273 -33.365273 -57.3 -7.2 APR 8 54564 -0.04955 0.50355 -0.372249 -33.372249 -58.5 -6.4 APR 13 54569 -0.03571 0.51168 -0.379479 -33.379479 -57.4 -7.9 APR 18 54574 -0.02219 0.52048 -0.386617 -33.386617 -57.0 -7.4 APR 23 54579 -0.01142 0.52653 -0.393592 -33.393592 -56.7 -8.0 APR 28 54584 0.00238 0.53243 -0.400341 -33.400341 -56.1 -8.4 MAY 3 54589 0.02067 0.53847 -0.406877 -33.406877 -56.5 -7.9 MAY 8 54594 0.03949 0.54283 -0.413177 -33.413177 -58.0 -8.3 MAY 13 54599 0.05619 0.54729 -0.419146 -33.419146 -57.4 -8.0 MAY 18 54604 0.07368 0.54986 -0.424803 -33.424803 -57.2 -7.8 MAY 23 54609 0.09084 0.55098 -0.430063 -33.430063 -57.6 -8.5 MAY 28 54614 0.10777 0.55143 -0.434908 -33.434908 -57.4 -8.0 JUN 2 54619 0.12375 0.54998 -0.439369 -33.439369 -59.4 -7.7 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 242 (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 2006 IERS Annual Report. 2008 MJD x y UT1-UTC UT1-UT1R D dPsi dEpsilon (0 h UTC) " " s ms ms 0.001" 0.001" FEB 3 54499 -0.11985 0.33565 -0.303970 0.354 0.565 -59.0 -3.6 FEB 4 54500 -0.12053 0.33841 -0.304523 0.899 0.618 -59.2 -3.8 FEB 5 54501 -0.12085 0.34117 -0.305208 1.344 0.784 -59.4 -3.8 FEB 6 54502 -0.12129 0.34407 -0.306059 1.608 0.981 -59.3 -3.8 FEB 7 54503 -0.12206 0.34693 -0.307170 1.633 1.205 -59.0 -3.8 FEB 8 54504 -0.12286 0.34949 -0.308473 1.397 1.434 -58.8 -3.8 FEB 9 54505 -0.12351 0.35201 -0.309973 0.936 1.560 -58.9 -3.7 FEB 10 54506 -0.12399 0.35488 -0.311570 0.338 1.633 -59.3 -3.6 FEB 11 54507 -0.12473 0.35773 -0.313204 -0.270 1.626 -59.9 -3.5 FEB 12 54508 -0.12566 0.35998 -0.314829 -0.756 1.449 -60.3 -3.6 FEB 13 54509 -0.12612 0.36195 -0.316161 -1.019 1.232 -60.4 -3.7 FEB 14 54510 -0.12577 0.36444 -0.317295 -1.016 1.018 -60.3 -3.8 FEB 15 54511 -0.12529 0.36722 -0.318235 -0.770 0.765 -60.0 -3.9 FEB 16 54512 -0.12528 0.36949 -0.318916 -0.365 0.594 -59.8 -4.1 FEB 17 54513 -0.12572 0.37146 -0.319466 0.077 0.552 -59.5 -4.4 FEB 18 54514 -0.12646 0.37395 -0.320070 0.432 0.686 -59.2 -4.6 FEB 19 54515 -0.12692 0.37681 -0.320871 0.603 0.936 -58.9 -4.6 FEB 20 54516 -0.12719 0.37960 -0.321928 0.549 1.151 -58.5 -4.5 FEB 21 54517 -0.12736 0.38218 -0.323162 0.291 1.303 -58.2 -4.3 FEB 22 54518 -0.12740 0.38494 -0.324501 -0.103 1.347 -58.0 -4.2 FEB 23 54519 -0.12745 0.38788 -0.325841 -0.535 1.310 -57.9 -4.2 FEB 24 54520 -0.12722 0.39092 -0.327104 -0.911 1.216 -57.9 -4.4 FEB 25 54521 -0.12685 0.39388 -0.328289 -1.157 1.090 -58.2 -4.7 FEB 26 54522 -0.12636 0.39646 -0.329283 -1.224 0.882 -58.7 -4.7 FEB 27 54523 -0.12542 0.39900 -0.330064 -1.098 0.646 -59.1 -4.7 FEB 28 54524 -0.12417 0.40166 -0.330617 -0.788 0.454 -59.0 -4.6 FEB 29 54525 -0.12284 0.40409 -0.330973 -0.331 0.296 -58.7 -4.8 MAR 1 54526 -0.12134 0.40678 -0.331205 0.217 0.226 -58.2 -5.2 MAR 2 54527 -0.12012 0.40981 -0.331410 0.782 0.266 -57.8 -5.5 MAR 3 54528 -0.11909 0.41274 -0.331794 1.279 0.386 -57.7 -5.7 MAR 4 54529 -0.11813 0.41593 -0.332242 1.626 0.595 -57.9 -5.7 MAR 5 54530 -0.11701 0.41898 -0.332980 1.748 0.889 -58.2 -5.7 MAR 6 54531 -0.11570 0.42180 -0.333992 1.601 1.162 -58.3 -5.6 MAR 7 54532 -0.11475 0.42436 -0.335262 1.191 1.386 -58.2 -5.4 MAR 8 54533 -0.11341 0.42672 -0.336779 0.585 1.550 -58.1 -5.1 MAR 9 54534 -0.11192 0.42939 -0.338332 -0.092 1.534 -58.3 -4.8 MAR 10 54535 -0.11068 0.43180 -0.339819 -0.691 1.362 -58.8 -4.7 MAR 11 54536 -0.10934 0.43448 -0.341050 -1.077 1.098 -59.2 -4.9 MAR 12 54537 -0.10800 0.43758 -0.342080 -1.181 0.813 -59.3 -5.3 MAR 13 54538 -0.10654 0.44044 -0.342831 -1.007 0.593 -59.1 -5.7 MAR 14 54539 -0.10486 0.44327 -0.343338 -0.637 0.464 -58.9 -6.0 MAR 15 54540 -0.10300 0.44605 -0.343760 -0.190 0.454 -59.2 -6.1 MAR 16 54541 -0.10093 0.44894 -0.344280 0.205 0.563 -58.9 -6.3 MAR 17 54542 -0.09858 0.45207 -0.344919 0.448 0.767 -58.6 -6.4 MAR 18 54543 -0.09631 0.45511 -0.345827 0.486 1.015 -58.3 -6.5 MAR 19 54544 -0.09410 0.45792 -0.347004 0.318 1.252 -58.0 -6.5 MAR 20 54545 -0.09156 0.46091 -0.348311 -0.007 1.393 -57.9 -6.3 MAR 21 54546 -0.08887 0.46390 -0.349693 -0.407 1.461 -57.8 -6.1 MAR 22 54547 -0.08615 0.46699 -0.351214 -0.791 1.467 -57.7 -6.0 MAR 23 54548 -0.08335 0.47022 -0.352678 -1.076 1.427 -57.7 -6.1 MAR 24 54549 -0.08072 0.47313 -0.354038 -1.201 1.309 -57.7 -6.3 MAR 25 54550 -0.07843 0.47586 -0.355274 -1.136 1.152 -57.9 -6.5 MAR 26 54551 -0.07624 0.47835 -0.356344 -0.881 0.974 -58.0 -6.5 MAR 27 54552 -0.07408 0.48067 -0.357227 -0.464 0.789 -58.0 -6.5 MAR 28 54553 -0.07217 0.48288 -0.357973 0.063 0.673 -57.8 -6.7 MAR 29 54554 -0.07060 0.48493 -0.358595 0.634 0.630 -57.5 -7.0 MAR 30 54555 -0.06880 0.48661 -0.359257 1.172 0.710 -57.2 -7.3 MAR 31 54556 -0.06646 0.48831 -0.360027 1.595 0.881 -56.9 -7.4 APR 1 54557 -0.06413 0.49001 -0.360989 1.829 1.075 -56.9 -7.3 APR 2 54558 -0.06197 0.49159 -0.362191 1.813 1.357 -57.1 -7.2 APR 3 54559 -0.05992 0.49347 -0.363747 1.526 1.619 -57.3 -7.2 APR 4 54560 -0.05798 0.49552 -0.365605 0.997 1.820 -57.2 -7.1 APR 5 54561 -0.05609 0.49761 -0.367654 0.321 1.899 -57.0 -6.7 APR 6 54562 -0.05403 0.49970 -0.369738 -0.358 1.821 -57.2 -6.2 APR 7 54563 -0.05177 0.50172 -0.371691 -0.884 1.599 -57.8 -6.1 APR 8 54564 -0.04955 0.50355 -0.373392 -1.143 1.298 -58.5 -6.4 APR 9 54565 -0.04733 0.50527 -0.374801 -1.103 1.008 -58.9 -7.0 APR 10 54566 -0.04481 0.50689 -0.375967 -0.818 0.814 -58.7 -7.4 APR 11 54567 -0.04192 0.50838 -0.377004 -0.409 0.757 -58.2 -7.7 APR 12 54568 -0.03887 0.50986 -0.378054 -0.015 0.833 -57.7 -7.9 APR 13 54569 -0.03571 0.51168 -0.379229 0.250 0.999 -57.4 -7.9 APR 14 54570 -0.03260 0.51378 -0.380589 0.326 1.199 -57.3 -7.8 APR 15 54571 -0.02979 0.51577 -0.382143 0.206 1.380 -57.3 -7.7 APR 16 54572 -0.02704 0.51756 -0.383847 -0.070 1.502 -57.2 -7.6 APR 17 54573 -0.02440 0.51911 -0.385630 -0.432 1.546 -57.1 -7.5 APR 18 54574 -0.02219 0.52048 -0.387416 -0.799 1.507 -57.0 -7.4 APR 19 54575 -0.02015 0.52174 -0.389121 -1.092 1.394 -56.9 -7.3 APR 20 54576 -0.01807 0.52301 -0.390680 -1.247 1.227 -56.7 -7.3 APR 21 54577 -0.01597 0.52422 -0.392054 -1.225 1.033 -56.6 -7.6 APR 22 54578 -0.01381 0.52538 -0.393232 -1.015 0.843 -56.7 -7.8 APR 23 54579 -0.01142 0.52653 -0.394228 -0.635 0.685 -56.7 -8.0 APR 24 54580 -0.00879 0.52769 -0.395094 -0.131 0.581 -56.7 -8.0 APR 25 54581 -0.00594 0.52902 -0.395886 0.436 0.546 -56.7 -8.1 APR 26 54582 -0.00305 0.53024 -0.396680 0.993 0.586 -56.5 -8.3 APR 27 54583 -0.00037 0.53134 -0.397546 1.465 0.699 -56.4 -8.4 APR 28 54584 0.00238 0.53243 -0.398557 1.783 0.878 -56.1 -8.4 APR 29 54585 0.00556 0.53356 -0.399775 1.888 1.107 -55.9 -8.1 APR 30 54586 0.00911 0.53481 -0.401234 1.744 1.356 -56.0 -8.0 MAY 1 54587 0.01287 0.53617 -0.402936 1.352 1.578 -56.2 -8.1 MAY 2 54588 0.01679 0.53744 -0.404817 0.769 1.715 -56.3 -8.1 MAY 3 54589 0.02067 0.53847 -0.406771 0.106 1.717 -56.5 -7.9 MAY 4 54590 0.02441 0.53942 -0.408649 -0.490 1.567 -56.9 -7.4 MAY 5 54591 0.02823 0.54023 -0.410313 -0.881 1.299 -57.6 -7.3 MAY 6 54592 0.03213 0.54095 -0.411680 -0.988 0.991 -58.2 -7.5 MAY 7 54593 0.03591 0.54181 -0.412761 -0.820 0.742 -58.3 -8.0 MAY 8 54594 0.03949 0.54283 -0.413654 -0.477 0.621 -58.0 -8.3 MAY 9 54595 0.04305 0.54387 -0.414499 -0.101 0.650 -57.5 -8.5 MAY 10 54596 0.04652 0.54473 -0.415432 0.171 0.794 -57.1 -8.6 MAY 11 54597 0.04983 0.54551 -0.416538 0.257 0.988 -56.9 -8.5 MAY 12 54598 0.05300 0.54639 -0.417837 0.141 1.165 -57.1 -8.3 MAY 13 54599 0.05619 0.54729 -0.419282 -0.136 1.281 -57.4 -8.0 MAY 14 54600 0.05963 0.54800 -0.420808 -0.501 1.317 -57.7 -7.8 MAY 15 54601 0.06328 0.54857 -0.422326 -0.873 1.273 -57.7 -7.8 MAY 16 54602 0.06681 0.54906 -0.423763 -1.178 1.160 -57.5 -7.8 MAY 17 54603 0.07022 0.54952 -0.425057 -1.355 0.995 -57.3 -7.8 MAY 18 54604 0.07368 0.54986 -0.426168 -1.365 0.800 -57.2 -7.8 MAY 19 54605 0.07709 0.55004 -0.427078 -1.191 0.602 -57.3 -8.1 MAY 20 54606 0.08061 0.55022 -0.427801 -0.844 0.428 -57.4 -8.4 MAY 21 54607 0.08407 0.55040 -0.428370 -0.362 0.303 -57.6 -8.6 MAY 22 54608 0.08743 0.55064 -0.428849 0.197 0.244 -57.7 -8.6 MAY 23 54609 0.09084 0.55098 -0.429300 0.763 0.258 -57.6 -8.5 MAY 24 54610 0.09411 0.55130 -0.429804 1.262 0.344 -57.6 -8.4 MAY 25 54611 0.09728 0.55145 -0.430422 1.628 0.492 -57.6 -8.4 MAY 26 54612 0.10055 0.55148 -0.431210 1.807 0.684 -57.6 -8.3 MAY 27 54613 0.10407 0.55153 -0.432203 1.766 0.898 -57.4 -8.1 MAY 28 54614 0.10777 0.55143 -0.433409 1.499 1.101 -57.4 -8.0 MAY 29 54615 0.11143 0.55113 -0.434791 1.039 1.249 -57.6 -8.0 MAY 30 54616 0.11487 0.55081 -0.436275 0.463 1.297 -57.9 -8.2 MAY 31 54617 0.11799 0.55054 -0.437744 -0.111 1.215 -58.3 -8.1 JUN 1 54618 0.12088 0.55025 -0.439063 -0.552 1.006 -58.8 -7.8 JUN 2 54619 0.12375 0.54998 -0.440127 -0.759 0.723 -59.4 -7.7 IERS, B 242 (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" FEB 3 54499 -0.11986 0.33563 -0.303970 -59.01 -3.62 0.01 0.01 0.01 0.03 0.02 FEB 8 54504 -0.12287 0.34948 -0.308467 -58.85 -3.74 0.01 0.01 0.01 0.05 0.03 FEB 13 54509 -0.12613 0.36194 -0.316158 -60.45 -3.65 0.01 0.01 0.01 0.04 0.02 FEB 18 54514 -0.12647 0.37394 -0.320067 -59.21 -4.52 0.01 0.01 0.01 0.04 0.02 FEB 23 54519 -0.12746 0.38787 -0.325839 -57.80 -4.22 0.01 0.01 0.01 0.06 0.04 FEB 28 54524 -0.12418 0.40164 -0.330615 -58.97 -4.57 0.01 0.01 - 0.03 0.02 MAR 4 54529 -0.11814 0.41593 -0.332233 -57.91 -5.68 0.01 0.01 0.01 0.04 0.03 MAR 9 54534 -0.11193 0.42938 -0.338328 -58.32 -4.85 0.01 0.01 0.01 0.10 0.09 MAR 14 54539 -0.10487 0.44326 -0.343337 -58.83 -6.02 0.01 0.01 0.01 0.04 0.03 MAR 19 54544 -0.09413 0.45790 -0.347009 -57.56 -6.67 0.02 0.02 0.03 0.43 0.18 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) FEB 3 54499 0.00114 72.921 15051 FEB 8 54504 0.00108 15056 FEB 13 54509 0.00110 15053 FEB 18 54514 0.00097 15065 FEB 23 54519 0.00090 15071 FEB 28 54524 0.00085 15075 MAR 4 54529 0.00084 15075 5 - INFORMATION ON TIME SCALES No leap second will be introduced in UTC on 30 June 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 242 (4) 6 - SUMMARY OF CONTRIBUTED EARTH ORIENTATION PARAMETERS SERIES This section gives the average precision of the various series with respect to the combination . 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. 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 0.06 0.05 0.03 - 0.13 0.04 8 54501.21 to 54525.27 0.17 0.08 0.04 - 0.11 0.08 EOP(BKG) 3 R 4 0.11 0.07 0.07 - 0.13 0.05 9 54501.21 to 54525.27 0.14 0.09 0.04 - 0.09 0.04 EOP(BKG) 3 R 2 - - 0.10 - - - 32 54499.33 to 54528.79 - - 0.11 - - - EOP(USNO) 5 R 1 - - 0.12 - - - 32 54499.33 to 54528.79 - - 0.16 - - - EOP(GSFC) 6 R 1 - - 0.13 - - - 32 54499.33 to 54528.79 - - 0.08 - - - EOP(IAA) 5 R 2 0.05 0.05 0.03 - 0.09 0.04 9 54501.21 to 54525.27 0.13 0.11 0.03 - 0.10 0.03 EOP(IAA) 5 R 1 - - 0.10 - - - 31 54499.33 to 54528.79 - - 0.09 - - - EOP(MAO) 3 R 1 0.09 0.06 0.04 - 0.14 0.05 8 54501.21 to 54525.34 0.12 0.08 0.07 - 0.29 0.10 EOP(GSFC) 7 R 1 0.10 0.07 0.07 - 0.15 0.06 10 54501.21 to 54525.27 0.20 0.40 0.03 - 0.12 0.05 EOP(USNO) 6 R 2 0.07 0.06 0.03 - 0.16 0.05 3 54501.21 to 54508.21 0.12 0.08 0.05 - 0.09 0.03 EOP(IVS) 2 R 1 0.02 0.02 0.01 - 0.06 0.02 8 54501.21 to 54525.28 0.10 0.08 0.03 - 0.05 0.04 GPS EOP(CODE) 98 P 1 0.01 0.01 - 0.07 - - 30 54499.50 to 54528.50 0.03 0.03 - 0.14 - - EOP(EMR) 96 P 3 0.03 0.03 - 0.04 - - 30 54499.50 to 54528.50 0.06 0.04 - 0.16 - - EOP(ESOC) 96 P 1 0.25 0.24 - 0.02 - - 15 54499.50 to 54527.50 0.07 0.19 - 0.39 - - EOP(GFZ) 96 P 2 0.00 0.00 - 0.01 - - 30 54499.50 to 54528.50 0.04 0.03 - 0.11 - - EOP(IAA) 1 P 1 0.03 0.03 - 0.06 - - 30 54499.50 to 54528.50 0.10 0.19 - 0.28 - - EOP(JPL) 96 P 3 0.01 0.01 - 0.07 - - 30 54499.50 to 54528.50 0.08 0.19 - 0.22 - - EOP(NOAA) 96 P 1 0.00 0.00 - 0.25 - - 30 54499.50 to 54528.50 0.14 0.10 - 0.09 - - EOP(SIO) 96 P 1 0.02 0.02 - 0.05 - - 30 54499.50 to 54528.50 0.05 0.04 - 0.18 - - EOP(IGS R)96 P 2 0.02 0.03 0.14 0.05 - - 30 54499.50 to 54528.50 0.04 0.03 0.46 0.08 - - EOP(IGS) 7 P 1 0.02 0.02 0.03 0.06 - - 30 54499.50 to 54528.50 0.02 0.02 0.20 0.09 - - SLR EOP(ASI) 3 L 2 0.07 0.07 - 0.18 - - 30 54499.50 to 54528.50 0.21 0.15 - 0.54 - - EOP(ILRS) 5 L 1 0.05 0.05 - 0.49 - - 30 54499.50 to 54528.50 0.16 0.26 - 0.40 - - EOP(IAA) 2 L 1 0.04 0.05 0.02 0.02 - - 31 54499.00 to 54529.00 0.18 0.18 0.29 0.11 - - EOP(MCC) 97 L 1 0.16 0.17 - 0.16 - - 31 54499.00 to 54529.00 0.18 0.25 - 1.00 - - Bulletin A EOP(NEOS) 97 C 1 0.04 0.03 0.03 - - - 31 54499.00 to 54529.00 0.06 0.08 0.14 - - -