BULLETIN B 228 1 february 2007 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 2006/07 " " s s 0.001" 0.001" (0h UTC) Final Bulletin B values. DEC 5 54074 -0.03880 0.31017 0.067907 -32.932093 -59.2 -2.7 DEC 10 54079 -0.04335 0.31858 0.061927 -32.938073 -57.9 -2.5 DEC 15 54084 -0.04786 0.32491 0.056244 -32.943756 -57.8 -2.1 DEC 20 54089 -0.05109 0.33195 0.050979 -32.949021 -58.6 -2.4 DEC 25 54094 -0.05128 0.33659 0.045945 -32.954055 -58.0 -2.3 DEC 30 54099 -0.04947 0.34516 0.040980 -32.959020 -58.8 -2.0 JAN 4 54104 -0.05290 0.35102 0.035693 -32.964307 -58.0 -2.3 Preliminary extension, to be updated weekly in Bulletin A and monthly in Bulletin B. JAN 9 54109 -0.05756 0.35877 0.030963 -32.969037 -57.0 -1.9 JAN 14 54114 -0.05835 0.36786 0.025343 -32.974657 -57.8 -2.3 JAN 19 54119 -0.05589 0.37698 0.018926 -32.981074 -57.4 -2.7 JAN 24 54124 -0.05484 0.38671 0.012200 -32.987800 -58.6 -2.3 JAN 29 54129 -0.05187 0.39545 0.004815 -32.995185 -58.9 -2.5 FEB 3 54134 -0.04812 0.40431 -0.002544 -33.002544 -57.5 -2.8 FEB 8 54139 -0.04270 0.41248 -0.009441 -33.009441 -57.5 -2.6 FEB 13 54144 -0.03655 0.42035 -0.015789 -33.015789 -57.9 -3.6 FEB 18 54149 -0.02963 0.42789 -0.021725 -33.021725 -58.1 -3.8 FEB 23 54154 -0.02210 0.43504 -0.027378 -33.027378 -58.7 -3.4 FEB 28 54159 -0.01404 0.44174 -0.032871 -33.032871 -58.1 -4.4 MAR 5 54164 -0.00550 0.44795 -0.038288 -33.038288 -56.9 -3.9 MAR 10 54169 0.00344 0.45361 -0.043697 -33.043697 -56.9 -4.5 MAR 15 54174 0.01273 0.45868 -0.049152 -33.049152 -56.5 -5.3 MAR 20 54179 0.02230 0.46311 -0.054684 -33.054684 -56.0 -4.8 MAR 25 54184 0.03211 0.46686 -0.060307 -33.060307 -57.7 -5.6 MAR 30 54189 0.04209 0.46990 -0.066029 -33.066029 -56.2 -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 228 (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 2005 IERS Annual Report. 2006/07 MJD x y UT1-UTC UT1-UT1R D dPsi dEpsilon (0 h UTC) " " s ms ms 0.001" 0.001" DEC 5 54074 -0.03880 0.31017 0.066752 -1.155 0.805 -59.2 -2.7 DEC 6 54075 -0.03929 0.31200 0.065998 -0.715 0.706 -58.7 -3.0 DEC 7 54076 -0.04025 0.31398 0.065298 -0.235 0.723 -58.2 -3.1 DEC 8 54077 -0.04147 0.31590 0.064519 0.171 0.863 -58.1 -3.0 DEC 9 54078 -0.04251 0.31744 0.063556 0.430 1.039 -58.0 -2.8 DEC 10 54079 -0.04335 0.31858 0.062440 0.513 1.210 -57.9 -2.5 DEC 11 54080 -0.04417 0.31950 0.061155 0.432 1.356 -58.3 -2.2 DEC 12 54081 -0.04483 0.32050 0.059746 0.225 1.439 -58.2 -2.1 DEC 13 54082 -0.04557 0.32196 0.058297 -0.057 1.432 -57.9 -2.0 DEC 14 54083 -0.04661 0.32354 0.056904 -0.352 1.335 -57.7 -2.0 DEC 15 54084 -0.04786 0.32491 0.055647 -0.596 1.247 -57.8 -2.1 DEC 16 54085 -0.04890 0.32626 0.054427 -0.734 1.131 -59.0 -1.9 DEC 17 54086 -0.04958 0.32770 0.053397 -0.721 0.932 -59.1 -2.0 DEC 18 54087 -0.05010 0.32923 0.052565 -0.537 0.756 -59.2 -2.2 DEC 19 54088 -0.05050 0.33070 0.051874 -0.188 0.642 -58.6 -2.4 DEC 20 54089 -0.05109 0.33195 0.051261 0.282 0.560 -58.6 -2.4 DEC 21 54090 -0.05193 0.33282 0.050723 0.796 0.519 -58.3 -2.4 DEC 22 54091 -0.05254 0.33330 0.050184 1.249 0.609 -58.1 -2.3 DEC 23 54092 -0.05254 0.33389 0.049470 1.531 0.834 -58.1 -2.3 DEC 24 54093 -0.05202 0.33499 0.048497 1.560 1.111 -58.0 -2.2 DEC 25 54094 -0.05128 0.33659 0.047249 1.304 1.371 -58.0 -2.3 DEC 26 54095 -0.05072 0.33836 0.045768 0.801 1.554 -57.9 -2.2 DEC 27 54096 -0.05044 0.34011 0.044175 0.146 1.623 -58.0 -2.2 DEC 28 54097 -0.05024 0.34190 0.042571 -0.525 1.625 -58.3 -2.1 DEC 29 54098 -0.04981 0.34366 0.041028 -1.074 1.505 -58.6 -2.0 DEC 30 54099 -0.04947 0.34516 0.039587 -1.393 1.307 -58.8 -2.0 DEC 31 54100 -0.04939 0.34614 0.038419 -1.430 1.005 -58.9 -2.1 JAN 1 54101 -0.04943 0.34705 0.037563 -1.201 0.731 -58.9 -2.3 JAN 2 54102 -0.04993 0.34830 0.036930 -0.785 0.565 -58.7 -2.5 JAN 3 54103 -0.05118 0.34968 0.036392 -0.295 0.525 -58.4 -2.6 JAN 4 54104 -0.05290 0.35102 0.035844 0.151 0.567 -58.0 -2.3 JAN 5 54105 -0.05450 0.35243 0.035257 0.464 0.688 -57.5 -2.4 JAN 6 54106 -0.05586 0.35392 0.034469 0.600 0.887 -57.2 -2.3 JAN 7 54107 -0.05671 0.35532 0.033489 0.557 1.068 -57.0 -2.1 JAN 8 54108 -0.05714 0.35686 0.032349 0.369 1.228 -56.9 -2.0 JAN 9 54109 -0.05756 0.35877 0.031053 0.090 1.352 -57.0 -1.9 JAN 10 54110 -0.05806 0.36093 0.029672 -0.216 1.362 -56.8 -1.9 JAN 11 54111 -0.05896 0.36281 0.028350 -0.482 1.302 -57.0 -1.9 JAN 12 54112 -0.05912 0.36443 0.027092 -0.653 1.273 -57.3 -2.0 JAN 13 54113 -0.05867 0.36619 0.025823 -0.681 1.148 -57.6 -2.1 JAN 14 54114 -0.05835 0.36786 0.024800 -0.544 0.995 -57.8 -2.3 JAN 15 54115 -0.05797 0.36944 0.023828 -0.239 0.901 -57.9 -2.5 JAN 16 54116 -0.05738 0.37114 0.022982 0.201 0.799 -57.9 -2.6 JAN 17 54117 -0.05695 0.37293 0.022202 0.712 0.772 -57.8 -2.7 JAN 18 54118 -0.05647 0.37473 0.021401 1.193 0.854 -57.6 -2.7 JAN 19 54119 -0.05589 0.37698 0.020456 1.529 1.073 -57.4 -2.7 JAN 20 54120 -0.05567 0.37946 0.019226 1.616 1.386 -58.3 -2.5 JAN 21 54121 -0.05559 0.38142 0.017678 1.397 1.697 -58.1 -2.3 JAN 22 54122 -0.05531 0.38310 0.015853 0.894 1.951 -58.0 -2.2 JAN 23 54123 -0.05504 0.38484 0.013818 0.204 2.115 -58.2 -2.2 JAN 24 54124 -0.05484 0.38671 0.011676 -0.523 2.123 -58.6 -2.3 JAN 25 54125 -0.05467 0.38861 0.009621 -1.133 1.959 -59.0 -2.3 IERS, B 228 (3) 3 - NORMAL VALUES OF THE EARTH ORIENTATION PARAMETERS AT FIVE-DAY INTERVALS (IERS evaluation). Raw normal values Uncertainties 2006/07 MJD x y UT1-UTC dPsi dEps x y UT1 dPsi dEps (0 h UTC) " " s 0.001" 0.001" 0.0001s 0.001" DEC 5 54074 -0.03880 0.31017 0.066749 -59.42 -2.74 0.01 0.01 0.01 0.06 0.02 DEC 10 54079 -0.04335 0.31857 0.062444 -58.05 -2.47 0.01 0.01 0.01 0.06 0.02 DEC 15 54084 -0.04786 0.32492 0.055648 -57.52 -2.15 0.01 0.02 0.01 0.15 0.07 DEC 20 54089 -0.05109 0.33194 0.051258 -58.59 -2.47 0.02 0.02 0.02 0.05 0.02 DEC 25 54094 -0.05129 0.33658 0.047252 - - 0.02 0.02 0.04 - - DEC 30 54099 -0.04947 0.34515 0.039586 -58.65 -2.11 0.02 0.02 0.02 0.08 0.03 JAN 4 54104 -0.05290 0.35102 0.035848 -57.88 -2.33 0.01 0.01 0.02 0.08 0.03 JAN 9 54109 -0.05756 0.35877 0.031050 - - 0.01 0.02 0.02 - - JAN 14 54114 -0.05835 0.36785 0.024804 -57.81 -2.29 0.02 0.03 0.03 0.11 0.05 JAN 19 54119 -0.05589 0.37699 0.020456 -57.17 -2.75 0.01 0.01 0.01 0.15 0.06 JAN 24 54124 -0.05484 0.38671 0.011677 - - 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 2006/07 MJD s (microrad/s) DEC 5 54074 0.00119 72.921 15047 DEC 10 54079 0.00121 15044 DEC 15 54084 0.00105 15058 DEC 20 54089 0.00107 15056 DEC 25 54094 0.00098 15064 DEC 30 54099 0.00113 15051 JAN 4 54104 0.00096 15065 5 - INFORMATION ON TIME SCALES No leap second was introduced in UTC on 31 December 2006. No leap second will be introduced in UTC on 30 June 2007. 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 228 (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 0.10 0.13 0.04 - 0.19 0.08 12 54074.21 to 54119.27 0.19 0.14 0.10 - 0.45 0.14 EOP(BKG) 3 R 4 0.07 0.06 0.03 - 0.13 0.06 4 54077.29 to 54112.27 0.11 0.10 0.15 - 0.17 0.05 EOP(BKG) 3 R 2 - - 0.09 - - - 39 54074.79 to 54124.79 - - 0.09 - - - EOP(USNO) 5 R 1 - - 0.10 - - - 40 54074.79 to 54124.79 - - 0.12 - - - EOP(GSFC) 6 R 1 - - 0.10 - - - 39 54074.79 to 54124.79 - - 0.11 - - - EOP(IAA) 5 R 2 0.08 0.08 0.03 - - - 11 54074.21 to 54119.27 0.11 0.14 0.09 - - - EOP(IAA) 5 R 1 - - 0.09 - - - 39 54074.79 to 54124.79 - - 0.17 - - - EOP(SPBU) 3 R 3 0.27 0.33 0.21 - 0.06 0.03 7 54074.21 to 54098.27 0.24 0.30 0.11 - 0.16 0.12 EOP(SPBU) 2 R 1 - - 0.11 - - - 39 54074.79 to 54124.79 - - 0.11 - - - EOP(MAO) 3 R 1 0.11 0.10 0.05 - - - 10 54074.23 to 54112.28 0.14 0.13 0.09 - - - EOP(GSFC) 6 R 1 0.07 0.07 0.03 - 0.16 0.06 10 54074.21 to 54112.27 0.09 0.07 0.10 - 0.12 0.09 EOP(USNO) 6 R 2 0.08 0.07 0.03 - 0.18 0.07 10 54074.21 to 54112.27 0.11 0.08 0.11 - 0.21 0.10 EOP(IVS) 0 R 1 0.06 0.06 0.02 - 0.09 0.04 10 54074.00 to 54112.00 0.11 0.12 0.07 - 0.08 0.08 GPS EOP(CODE) 98 P 1 0.01 0.01 - 0.06 - - 51 54074.50 to 54124.50 0.06 0.05 - 0.17 - - EOP(EMR) 96 P 3 0.03 0.03 - 0.04 - - 51 54074.50 to 54124.50 0.05 0.07 - 0.39 - - EOP(ESOC) 96 P 1 0.01 0.01 - 0.03 - - 51 54074.50 to 54124.50 0.06 0.05 - 0.42 - - EOP(GFZ) 96 P 2 0.01 0.01 - 0.02 - - 51 54074.50 to 54124.50 0.04 0.12 - 0.22 - - EOP(IAA) 1 P 1 0.03 0.03 - 0.06 - - 51 54074.50 to 54124.50 0.15 0.57 - 0.30 - - EOP(JPL) 96 P 3 0.02 0.02 - 0.11 - - 47 54074.50 to 54120.50 0.04 0.04 - 0.32 - - EOP(NOAA) 96 P 1 0.01 0.01 - 0.01 - - 51 54074.50 to 54124.50 0.15 0.09 - 0.26 - - EOP(SIO) 96 P 1 0.05 0.05 - 0.11 - - 51 54074.50 to 54124.50 0.11 0.32 - 0.20 - - EOP(IGS F)95 P 2 0.02 0.02 0.11 0.04 - - 40 54074.50 to 54113.50 0.03 0.06 0.26 0.15 - - EOP(IGS R)96 P 2 0.02 0.04 0.16 0.06 - - 51 54074.50 to 54124.50 0.04 0.06 0.74 0.18 - - EOP(IERS) 97 P 1 0.03 0.03 0.15 0.10 - - 51 54074.50 to 54124.50 0.02 0.03 0.25 0.17 - - SLR EOP(ASI) 3 L 2 0.08 0.07 - 0.18 - - 51 54074.50 to 54124.50 0.17 0.22 - 0.43 - - EOP(ILRS) 5 L 1 0.10 0.08 - 0.18 - - 44 54074.50 to 54124.50 0.14 0.15 - 0.41 - - EOP(IAA) 2 L 1 0.04 0.04 0.02 0.02 - - 52 54074.00 to 54125.00 0.19 0.16 0.24 0.17 - - EOP(MCC) 97 L 1 0.16 0.18 - 0.10 - - 52 54074.00 to 54125.00 0.29 0.17 - 0.75 - - EOP(ILRS) 5 L 1 0.10 0.08 - 0.18 - - 44 54074.50 to 54124.50 0.14 0.15 - 0.41 - - Bulletin A EOP(NEOS) 97 C 1 0.06 0.06 0.08 - - - 52 54074.00 to 54125.00 0.04 0.04 0.18 - - -