BULLETIN B 218 4 april 2006 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 2006 " " s s 0.001" 0.001" (0h UTC) Final Bulletin B values. FEB 3 53769 0.05025 0.38417 0.322391 -32.677609 -56.7 -2.2 FEB 8 53774 0.05153 0.38430 0.317918 -32.682082 -56.6 -2.9 FEB 13 53779 0.05737 0.38409 0.313308 -32.686692 -55.6 -2.6 FEB 18 53784 0.06422 0.38454 0.309230 -32.690770 -55.1 -2.9 FEB 23 53789 0.06768 0.38383 0.304741 -32.695259 -56.0 -3.7 FEB 28 53794 0.07206 0.38293 0.300062 -32.699938 -55.1 -3.5 MAR 5 53799 0.07876 0.38329 0.294361 -32.705639 -56.3 -3.9 Preliminary extension, to be updated weekly in Bulletin A and monthly in Bulletin B. MAR 10 53804 0.08061 0.38225 0.289352 -32.710648 -55.0 -4.7 MAR 15 53809 0.08362 0.38011 0.285712 -32.714288 -54.7 -3.9 MAR 20 53814 0.09275 0.37814 0.281770 -32.718230 -54.5 -4.8 MAR 25 53819 0.09805 0.37678 0.276821 -32.723179 -54.5 -5.1 MAR 30 53824 0.10146 0.37507 0.270914 -32.729086 -54.3 -4.4 APR 4 53829 0.10399 0.37268 0.265000 -32.735000 -54.9 -5.7 APR 9 53834 0.10587 0.37128 0.259220 -32.740780 -53.9 -5.4 APR 14 53839 0.10731 0.37007 0.254032 -32.745968 -53.9 -4.7 APR 19 53844 0.10841 0.36896 0.249332 -32.750668 -53.9 -5.7 APR 24 53849 0.10940 0.36790 0.245022 -32.754978 -52.8 -6.2 APR 29 53854 0.11034 0.36682 0.241077 -32.758923 -54.1 -5.4 MAY 4 53859 0.11128 0.36571 0.237522 -32.762478 -53.6 -6.4 MAY 9 53864 0.11222 0.36455 0.234356 -32.765644 -53.2 -5.8 MAY 14 53869 0.11315 0.36334 0.231617 -32.768383 -54.4 -5.9 MAY 19 53874 0.11408 0.36206 0.229305 -32.770695 -54.1 -6.2 MAY 24 53879 0.11500 0.36072 0.227444 -32.772556 -53.9 -5.8 MAY 29 53884 0.11586 0.35932 0.226032 -32.773968 -55.1 -6.0 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 218 (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 2004 IERS Annual Report. 2006 MJD x y UT1-UTC UT1-UT1R D dPsi dEpsilon (0 h UTC) " " s ms ms 0.001" 0.001" FEB 3 53769 0.05025 0.38417 0.321173 -1.218 1.507 -56.7 -2.2 FEB 4 53770 0.05015 0.38454 0.319753 -1.748 1.275 -57.1 -2.2 FEB 5 53771 0.05041 0.38458 0.318639 -1.990 0.964 -57.2 -2.3 FEB 6 53772 0.05097 0.38443 0.317817 -1.932 0.699 -57.2 -2.5 FEB 7 53773 0.05122 0.38443 0.317220 -1.622 0.504 -57.0 -2.6 FEB 8 53774 0.05153 0.38430 0.316779 -1.139 0.378 -56.6 -2.9 FEB 9 53775 0.05265 0.38423 0.316432 -0.576 0.343 -56.2 -3.1 FEB 10 53776 0.05388 0.38441 0.316066 -0.023 0.404 -55.8 -3.1 FEB 11 53777 0.05511 0.38452 0.315601 0.445 0.517 -55.7 -3.1 FEB 12 53778 0.05637 0.38440 0.315017 0.770 0.682 -55.6 -2.9 FEB 13 53779 0.05737 0.38409 0.314231 0.924 0.842 -55.6 -2.6 FEB 14 53780 0.05816 0.38383 0.313336 0.904 0.940 -55.6 -2.4 FEB 15 53781 0.05907 0.38362 0.312365 0.736 1.004 -55.5 -2.3 FEB 16 53782 0.06034 0.38359 0.311347 0.470 1.068 -55.3 -2.4 FEB 17 53783 0.06212 0.38395 0.310253 0.170 1.117 -55.2 -2.6 FEB 18 53784 0.06422 0.38454 0.309136 -0.095 1.085 -55.1 -2.9 FEB 19 53785 0.06586 0.38490 0.308103 -0.261 1.002 -55.1 -3.2 FEB 20 53786 0.06687 0.38480 0.307145 -0.279 0.869 -55.3 -3.5 FEB 21 53787 0.06740 0.38458 0.306370 -0.117 0.661 -55.6 -3.7 FEB 22 53788 0.06751 0.38422 0.305815 0.219 0.462 -55.8 -3.8 FEB 23 53789 0.06768 0.38383 0.305421 0.680 0.363 -56.0 -3.7 FEB 24 53790 0.06807 0.38348 0.305047 1.163 0.426 -56.0 -3.7 FEB 25 53791 0.06894 0.38303 0.304520 1.528 0.642 -55.8 -3.6 FEB 26 53792 0.07023 0.38271 0.303721 1.637 0.996 -55.6 -3.6 FEB 27 53793 0.07140 0.38275 0.302511 1.401 1.426 -55.3 -3.6 FEB 28 53794 0.07206 0.38293 0.300890 0.828 1.776 -55.1 -3.5 MAR 1 53795 0.07248 0.38295 0.299011 0.030 1.971 -55.1 -3.5 MAR 2 53796 0.07360 0.38304 0.297014 -0.813 1.947 -55.3 -3.4 MAR 3 53797 0.07499 0.38327 0.295175 -1.512 1.722 -55.7 -3.5 MAR 4 53798 0.07691 0.38292 0.293602 -1.933 1.419 -56.0 -3.6 MAR 5 53799 0.07876 0.38329 0.292339 -2.022 1.088 -56.3 -3.9 MAR 6 53800 0.07997 0.38344 0.291404 -1.810 0.775 -56.4 -4.2 MAR 7 53801 0.08076 0.38328 0.290757 -1.380 0.529 -56.3 -4.5 MAR 8 53802 0.08125 0.38279 0.290311 -0.835 0.395 -55.9 -4.7 MAR 9 53803 0.08113 0.38238 0.289935 -0.276 0.359 -55.4 -4.8 MAR 10 53804 0.08061 0.38225 0.289569 0.217 0.371 -55.0 -4.7 MAR 11 53805 0.08044 0.38234 0.289177 0.580 0.441 -54.8 -4.5 MAR 12 53806 0.08068 0.38225 0.288679 0.778 0.592 -54.7 -4.3 MAR 13 53807 0.08134 0.38153 0.287994 0.799 0.785 -54.8 -4.0 MAR 14 53808 0.08236 0.38071 0.287121 0.661 0.946 -54.8 -3.9 MAR 15 53809 0.08362 0.38011 0.286120 0.408 1.038 -54.7 -3.9 MAR 16 53810 0.08556 0.37949 0.285067 0.103 1.058 -54.7 -4.1 MAR 17 53811 0.08802 0.37910 0.284030 -0.182 0.986 -54.6 -4.2 MAR 18 53812 0.08990 0.37889 0.283118 -0.378 0.913 -54.6 -4.4 MAR 19 53813 0.09130 0.37853 0.282219 -0.426 0.824 -54.6 -4.6 MAR 20 53814 0.09275 0.37814 0.281476 -0.294 0.665 -54.5 -4.8 MAR 21 53815 0.09392 0.37784 0.280883 0.020 0.538 -54.4 -4.9 MAR 22 53816 0.09512 0.37772 0.280381 0.476 0.474 -54.2 -5.0 MAR 23 53817 0.09625 0.37750 0.279900 0.993 0.502 -54.0 -5.1 MAR 24 53818 0.09731 0.37706 0.279332 1.450 0.661 -53.9 -5.2 MAR 25 53819 0.09805 0.37678 0.278534 1.713 0.982 -54.5 -5.1 MAR 26 53820 0.09864 0.37664 0.277339 1.670 1.364 -54.4 -5.3 MAR 27 53821 0.09926 0.37642 0.275807 1.278 1.700 -54.1 -5.2 MAR 28 53822 0.09997 0.37597 0.273973 0.591 1.967 -53.9 -4.8 MAR 29 53823 0.10082 0.37551 0.271934 -0.248 2.087 -54.0 -4.5 MAR 30 53824 0.10146 0.37507 0.269865 -1.049 1.976 -54.3 -4.4 IERS, B 218 (3) 3 - NORMAL VALUES OF THE EARTH ORIENTATION PARAMETERS AT FIVE-DAY INTERVALS (IERS evaluation). Raw normal values Uncertainties 2006 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 53769 0.05024 0.38418 0.321173 -56.71 -2.27 0.01 0.01 0.01 0.07 0.03 FEB 8 53774 0.05153 0.38432 0.316779 -56.55 -2.88 0.02 0.02 0.02 0.04 0.02 FEB 13 53779 0.05736 0.38409 0.314231 -55.60 -2.65 0.02 0.02 0.02 0.05 0.02 FEB 18 53784 0.06423 0.38454 0.309138 -54.96 -2.76 0.01 0.01 0.02 0.10 0.04 FEB 23 53789 0.06770 0.38383 0.305420 -55.94 -3.73 0.02 0.02 0.02 0.05 0.02 FEB 28 53794 0.07206 0.38293 0.300890 -55.08 -3.52 0.01 0.01 0.02 0.05 0.02 MAR 5 53799 0.07874 0.38331 0.292339 -56.31 -3.89 0.01 0.01 0.01 0.03 0.01 MAR 10 53804 0.08061 0.38223 0.289569 -54.92 -4.75 0.01 0.01 0.01 0.08 0.03 MAR 15 53809 0.08362 0.38012 0.286119 -54.76 -3.95 0.01 0.01 0.02 0.06 0.03 MAR 20 53814 0.09274 0.37813 0.281474 -54.51 -4.77 0.01 0.01 0.02 0.09 0.04 MAR 25 53819 0.09806 0.37679 0.278534 -54.27 -5.13 0.01 0.02 0.01 0.10 0.04 MAR 30 53824 0.10146 0.37506 0.269864 - - 0.02 0.02 0.02 - - 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 2006 MJD s (microrad/s) FEB 3 53769 0.00086 72.921 15074 FEB 8 53774 0.00092 15069 FEB 13 53779 0.00091 15070 FEB 18 53784 0.00086 15074 FEB 23 53789 0.00086 15074 FEB 28 53794 0.00107 15056 MAR 5 53799 0.00117 15048 5 - INFORMATION ON TIME SCALES A leap second was introduced in UTC on 31 December 2005. No leap second will be introduced in UTC on 30 June 2006. 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 218 (4) 6 - SUMMARY OF CONTRIBUTED EARTH ORIENTATION PARAMETERS SERIES This section gives the average precision of the individual series contri- buting to the combination and their average agreement with it. 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. The complete list of measurements is available in the electronic-mailed version of Bulletin B in section 7. 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 0.07 0.08 0.04 - 0.16 0.06 15 53769.27 to 53818.27 0.12 0.14 0.07 - 0.56 0.11 EOP(BKG) 3 R 4 0.08 0.08 0.07 - 0.15 0.05 15 53769.27 to 53815.21 0.10 0.16 0.06 - 0.16 0.05 EOP(BKG) 3 R 2 - - 0.11 - - - 50 53769.80 to 53823.79 - - 0.10 - - - EOP(USNO) 5 R 1 - - 0.12 - - - 54 53769.80 to 53823.79 - - 0.11 - - - EOP(GSFC) 4 R 2 0.10 0.10 0.07 - 0.23 0.08 13 53769.27 to 53811.27 0.10 0.14 0.06 - 0.20 0.06 EOP(GSFC) 4 R 1 - - 0.13 - - - 47 53769.80 to 53819.33 - - 0.09 - - - EOP(IAA) 5 R 2 0.07 0.08 0.04 - - - 15 53769.27 to 53818.27 0.09 0.11 0.08 - - - EOP(IAA) 5 R 1 - - 0.11 - - - 48 53769.80 to 53820.33 - - 0.08 - - - EOP(SPBU) 3 R 3 0.23 0.32 0.16 - 0.06 0.03 12 53769.27 to 53811.27 0.19 0.19 0.09 - 0.12 0.07 EOP(SPBU) 2 R 1 - - 0.12 - - - 44 53769.80 to 53816.79 - - 0.11 - - - EOP(MAO) 3 R 1 0.07 0.09 0.04 - - - 12 53769.29 to 53811.34 0.08 0.13 0.05 - - - EOP(USNO) 6 R 1 0.08 0.08 0.03 - 0.18 0.07 15 53769.27 to 53818.27 0.08 0.13 0.09 - 0.14 0.08 EOP(IVS) 0 R 1 0.04 0.04 0.02 - 0.08 0.03 13 53769.00 to 53811.00 0.15 0.30 0.04 - 0.06 0.05 GPS EOP(CODE) 98 P 1 0.01 0.01 - 0.07 - - 55 53769.50 to 53823.50 0.05 0.05 - 0.22 - - EOP(EMR) 96 P 3 0.03 0.03 - 0.04 - - 55 53769.50 to 53823.50 0.09 0.08 - 0.48 - - EOP(ESOC) 96 P 1 0.01 0.01 - 0.04 - - 55 53769.50 to 53823.50 0.06 0.05 - 0.68 - - EOP(GFZ) 96 P 2 0.01 0.01 - 0.03 - - 55 53769.50 to 53823.50 0.05 0.10 - 0.29 - - EOP(IAA) 1 P 1 0.03 0.03 - 0.06 - - 55 53769.50 to 53823.50 0.14 0.23 - 0.54 - - EOP(JPL) 96 P 3 0.02 0.02 - 0.14 - - 51 53769.50 to 53819.50 0.05 0.04 - 0.30 - - EOP(NOAA) 96 P 1 0.00 0.00 - 0.02 - - 46 53769.50 to 53814.50 0.09 0.10 - 0.24 - - EOP(SIO) 96 P 1 0.03 0.04 - 0.06 - - 55 53769.50 to 53823.50 0.16 0.21 - 0.40 - - EOP(IGS F)95 P 2 0.02 0.02 0.06 0.05 - - 44 53769.50 to 53812.50 0.03 0.08 0.16 0.12 - - EOP(IGS R)96 P 2 0.05 0.04 0.17 0.07 - - 55 53769.50 to 53823.50 0.06 0.05 0.53 0.19 - - EOP(IERS) 97 P 1 0.03 0.03 0.17 0.12 - - 55 53769.50 to 53823.50 0.03 0.03 0.27 0.20 - - SLR EOP(ASI) 3 L 2 0.08 0.08 - 0.19 - - 54 53769.50 to 53822.50 0.22 0.25 - 0.74 - - EOP(DUT) 98 L 1 0.10 0.11 - - - - 12 53799.00 to 53824.00 0.47 0.56 - - - - EOP(IAA) 2 L 1 0.04 0.04 0.02 0.02 - - 56 53769.00 to 53824.00 0.16 0.18 0.20 0.14 - - EOP(MCC) 97 L 1 0.16 0.17 - 0.10 - - 21 53769.00 to 53789.00 0.16 0.24 - 0.25 - - EOP(ILRS) 5 L 1 0.07 0.07 - 0.14 - - 51 53769.50 to 53819.50 0.16 0.22 - 0.58 - - Bulletin A EOP(NEOS) 97 C 1 0.04 0.06 0.06 - - - 56 53769.00 to 53824.00 0.08 0.12 0.11 - - -