BULLETIN B 230 4 April 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 2007 " " s s 0.001" 0.001" (0h UTC) Final Bulletin B values. FEB 3 54134 -0.04778 0.40280 -0.002566 -33.002566 -57.0 -2.8 FEB 8 54139 -0.03854 0.41238 -0.009635 -33.009635 -57.4 -2.8 FEB 13 54144 -0.03375 0.42166 -0.016457 -33.016457 -57.0 -3.9 FEB 18 54149 -0.02951 0.42890 -0.021575 -33.021575 -57.5 -3.9 FEB 23 54154 -0.02343 0.43570 -0.025533 -33.025533 -58.0 -3.8 FEB 28 54159 -0.01460 0.44178 -0.030101 -33.030101 -57.0 -4.7 MAR 5 54164 -0.01160 0.44986 -0.034465 -33.034465 -55.9 -4.3 Preliminary extension, to be updated weekly in Bulletin A and monthly in Bulletin B. MAR 10 54169 -0.00812 0.45570 -0.039730 -33.039730 -56.6 -4.9 MAR 15 54174 -0.00439 0.46068 -0.045169 -33.045169 -56.0 -5.8 MAR 20 54179 0.00514 0.46864 -0.050724 -33.050724 -56.4 -4.4 MAR 25 54184 0.00956 0.47321 -0.057095 -33.057095 -57.3 -6.0 MAR 30 54189 0.01813 0.47682 -0.062996 -33.062996 -56.0 -5.8 APR 4 54194 0.02974 0.48061 -0.069031 -33.069031 -55.5 -5.3 APR 9 54199 0.04054 0.48269 -0.074944 -33.074944 -55.3 -6.6 APR 14 54204 0.05110 0.48382 -0.080757 -33.080757 -55.1 -6.9 APR 19 54209 0.06149 0.48412 -0.086418 -33.086418 -56.2 -5.7 APR 24 54214 0.07184 0.48360 -0.091927 -33.091927 -55.3 -7.6 APR 29 54219 0.08216 0.48230 -0.097259 -33.097259 -55.3 -6.3 MAY 4 54224 0.09241 0.48021 -0.102387 -33.102387 -55.2 -7.1 MAY 9 54229 0.10255 0.47733 -0.107277 -33.107277 -54.9 -7.3 MAY 14 54234 0.11252 0.47370 -0.111900 -33.111900 -54.8 -7.1 MAY 19 54239 0.12226 0.46930 -0.116234 -33.116234 -56.8 -7.1 MAY 24 54244 0.13172 0.46416 -0.120255 -33.120255 -55.6 -7.0 MAY 29 54249 0.14082 0.45829 -0.123939 -33.123939 -56.2 -6.5 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 230 (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. 2007 MJD x y UT1-UTC UT1-UT1R D dPsi dEpsilon (0 h UTC) " " s ms ms 0.001" 0.001" FEB 3 54134 -0.04778 0.40280 -0.001954 0.612 1.509 -57.0 -2.8 FEB 4 54135 -0.04555 0.40403 -0.003534 0.466 1.637 -57.0 -2.6 FEB 5 54136 -0.04362 0.40559 -0.005208 0.206 1.703 -57.1 -2.5 FEB 6 54137 -0.04122 0.40756 -0.006916 -0.102 1.709 -57.2 -2.5 FEB 7 54138 -0.03954 0.40994 -0.008604 -0.388 1.663 -57.3 -2.6 FEB 8 54139 -0.03854 0.41238 -0.010223 -0.588 1.538 -57.4 -2.8 FEB 9 54140 -0.03774 0.41464 -0.011665 -0.653 1.361 -57.4 -3.0 FEB 10 54141 -0.03686 0.41651 -0.012934 -0.553 1.184 -57.4 -3.2 FEB 11 54142 -0.03600 0.41817 -0.014037 -0.284 1.029 -57.3 -3.4 FEB 12 54143 -0.03497 0.41989 -0.015002 0.133 0.876 -57.1 -3.7 FEB 13 54144 -0.03375 0.42166 -0.015812 0.646 0.756 -57.0 -3.9 FEB 14 54145 -0.03270 0.42329 -0.016548 1.168 0.717 -57.1 -4.1 FEB 15 54146 -0.03147 0.42494 -0.017286 1.588 0.828 -57.3 -4.2 FEB 16 54147 -0.03076 0.42648 -0.018121 1.787 0.923 -57.4 -4.2 FEB 17 54148 -0.03031 0.42764 -0.019153 1.675 1.114 -57.5 -4.1 FEB 18 54149 -0.02951 0.42890 -0.020342 1.233 1.371 -57.5 -3.9 FEB 19 54150 -0.02856 0.43034 -0.021856 0.530 1.595 -57.5 -3.8 FEB 20 54151 -0.02769 0.43172 -0.023473 -0.284 1.564 -57.5 -3.7 FEB 21 54152 -0.02691 0.43308 -0.025003 -1.029 1.391 -57.6 -3.6 FEB 22 54153 -0.02560 0.43429 -0.026291 -1.544 1.115 -57.8 -3.7 FEB 23 54154 -0.02343 0.43570 -0.027276 -1.743 0.847 -58.0 -3.8 FEB 24 54155 -0.02133 0.43687 -0.028038 -1.624 0.616 -58.1 -4.0 FEB 25 54156 -0.01917 0.43781 -0.028562 -1.259 0.464 -58.0 -4.2 FEB 26 54157 -0.01748 0.43906 -0.029006 -0.760 0.421 -57.8 -4.4 FEB 27 54158 -0.01593 0.44018 -0.029441 -0.248 0.446 -57.4 -4.6 FEB 28 54159 -0.01460 0.44178 -0.029924 0.178 0.537 -57.0 -4.7 MAR 1 54160 -0.01377 0.44344 -0.030529 0.448 0.688 -56.6 -4.7 MAR 2 54161 -0.01312 0.44531 -0.031302 0.534 0.866 -56.3 -4.6 MAR 3 54162 -0.01274 0.44713 -0.032252 0.447 1.029 -56.1 -4.5 MAR 4 54163 -0.01226 0.44855 -0.033343 0.226 1.151 -55.9 -4.4 MAR 5 54164 -0.01160 0.44986 -0.034532 -0.068 1.227 -55.9 -4.3 MAR 6 54165 -0.01109 0.45099 -0.035770 -0.362 1.237 -56.0 -4.2 MAR 7 54166 -0.01056 0.45210 -0.036985 -0.587 1.197 -56.2 -4.3 MAR 8 54167 -0.00980 0.45354 -0.038150 -0.687 1.119 -56.9 -4.3 MAR 9 54168 -0.00901 0.45478 -0.039213 -0.626 0.985 -56.6 -4.6 MAR 10 54169 -0.00812 0.45570 -0.040121 -0.391 0.776 -56.6 -4.9 MAR 11 54170 -0.00726 0.45656 -0.040854 0.002 0.662 -56.4 -5.2 MAR 12 54171 -0.00640 0.45740 -0.041464 0.509 0.572 -56.3 -5.4 MAR 13 54172 -0.00573 0.45843 -0.042026 1.062 0.554 -56.2 -5.5 MAR 14 54173 -0.00527 0.45964 -0.042606 1.561 0.609 -56.0 -5.7 MAR 15 54174 -0.00439 0.46068 -0.043279 1.891 0.789 -56.0 -5.8 MAR 16 54175 -0.00280 0.46185 -0.044214 1.944 1.121 -56.1 -5.8 MAR 17 54176 -0.00084 0.46310 -0.045529 1.658 1.537 -56.8 -5.7 MAR 18 54177 0.00127 0.46442 -0.047267 1.050 1.889 -56.3 -5.4 MAR 19 54178 0.00336 0.46631 -0.049257 0.232 2.050 -56.0 -4.8 MAR 20 54179 0.00514 0.46864 -0.051341 -0.617 2.072 -56.4 -4.4 MAR 21 54180 0.00640 0.47041 -0.053382 -1.304 1.830 -57.1 -4.5 MAR 22 54181 0.00701 0.47138 -0.055127 -1.689 1.434 -57.6 -4.8 MAR 23 54182 0.00747 0.47206 -0.056431 -1.725 1.066 -57.8 -5.2 MAR 24 54183 0.00833 0.47270 -0.057349 -1.459 0.773 -57.7 -5.6 MAR 25 54184 0.00956 0.47321 -0.058102 -1.007 0.691 -57.3 -6.0 MAR 26 54185 0.01067 0.47376 -0.058816 -0.502 0.706 -56.8 -6.3 MAR 27 54186 0.01169 0.47452 -0.059546 -0.058 0.776 -56.4 -6.4 MAR 28 54187 0.01351 0.47528 -0.060387 0.246 0.948 -56.3 -6.2 MAR 29 54188 0.01576 0.47600 -0.061447 0.377 1.109 -56.2 -6.0 IERS, B 230 (3) 3 - NORMAL VALUES OF THE EARTH ORIENTATION PARAMETERS AT FIVE-DAY INTERVALS (IERS evaluation). Raw normal values Uncertainties 2007 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 54134 -0.04777 0.40281 -0.001956 -57.08 -2.88 0.02 0.01 0.01 0.08 0.03 FEB 8 54139 -0.03852 0.41239 -0.010227 -57.02 -2.87 0.02 0.02 0.01 0.05 0.02 FEB 13 54144 -0.03372 0.42166 -0.015813 -56.98 -3.90 0.02 0.02 0.02 0.06 0.03 FEB 18 54149 -0.02952 0.42891 -0.020340 -57.55 -3.92 0.02 0.02 0.02 0.08 0.03 FEB 23 54154 -0.02342 0.43573 -0.027278 -58.05 -3.77 0.01 0.01 0.01 0.03 0.01 FEB 28 54159 -0.01457 0.44176 -0.029923 -57.03 -4.74 0.02 0.02 0.02 0.05 0.02 MAR 5 54164 -0.01161 0.44986 -0.034534 -55.87 -4.34 0.02 0.02 0.01 0.04 0.02 MAR 10 54169 -0.00812 0.45571 -0.040125 - - 0.01 0.02 0.02 - - MAR 15 54174 -0.00437 0.46069 -0.043277 -55.81 -5.85 0.01 0.01 0.01 0.06 0.03 MAR 20 54179 0.00514 0.46864 -0.051343 - - 0.02 0.02 0.02 - - MAR 25 54184 0.00956 0.47321 -0.058104 - - 0.01 0.01 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 2007 MJD s (microrad/s) FEB 3 54134 0.00144 72.921 15025 FEB 8 54139 0.00140 15028 FEB 13 54144 0.00130 15037 FEB 18 54149 0.00078 15081 FEB 23 54154 0.00082 15078 FEB 28 54159 0.00090 15071 MAR 5 54164 0.00093 15069 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 230 (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 0.07 0.03 - 0.15 0.06 12 54137.21 to 54175.27 0.09 0.13 0.06 - 0.70 0.12 EOP(BKG) 3 R 4 0.06 0.06 0.03 - 0.11 0.04 11 54137.21 to 54175.27 0.09 0.13 0.06 - 0.26 0.07 EOP(BKG) 3 R 2 - - 0.09 - - - 48 54134.33 to 54187.79 - - 0.11 - - - EOP(USNO) 5 R 1 - - 0.10 - - - 50 54134.33 to 54187.79 - - 0.09 - - - EOP(GSFC) 6 R 1 - - 0.09 - - - 48 54134.33 to 54187.79 - - 0.11 - - - EOP(IAA) 5 R 2 0.05 0.05 0.02 - - - 11 54137.21 to 54175.28 0.18 0.13 0.06 - - - EOP(IAA) 5 R 1 - - 0.09 - - - 47 54134.33 to 54186.79 - - 0.13 - - - EOP(SPBU) 3 R 3 0.21 0.28 0.13 - 0.06 0.02 10 54137.21 to 54175.27 0.17 0.31 0.08 - 0.25 0.08 EOP(SPBU) 2 R 1 - - 0.10 - - - 48 54134.33 to 54187.79 - - 0.12 - - - EOP(MAO) 3 R 1 0.06 0.07 0.03 - - - 10 54137.22 to 54166.24 0.11 0.13 0.07 - - - EOP(GSFC) 6 R 1 0.05 0.05 0.02 - 0.11 0.05 10 54137.21 to 54166.27 0.08 0.11 0.10 - 0.21 0.07 EOP(USNO) 6 R 2 0.05 0.05 0.02 - 0.12 0.05 12 54137.21 to 54175.27 0.07 0.09 0.06 - 0.21 0.07 EOP(IVS) 7 R 1 0.02 0.02 0.01 - 0.14 0.02 8 54137.21 to 54166.27 0.08 0.19 0.08 - 0.33 0.07 GPS EOP(CODE) 98 P 1 0.01 0.01 - 0.07 - - 54 54134.50 to 54187.50 0.05 0.04 - 0.25 - - EOP(EMR) 96 P 3 0.03 0.03 - 0.04 - - 54 54134.50 to 54187.50 0.06 0.05 - 0.47 - - EOP(ESOC) 96 P 1 0.01 0.01 - 0.04 - - 54 54134.50 to 54187.50 0.05 0.05 - 0.79 - - EOP(GFZ) 96 P 2 0.01 0.01 - 0.02 - - 54 54134.50 to 54187.50 0.04 0.14 - 0.32 - - EOP(IAA) 1 P 1 0.03 0.03 - 0.06 - - 54 54134.50 to 54187.50 0.17 0.61 - 0.36 - - EOP(JPL) 96 P 3 0.02 0.02 - 0.13 - - 43 54134.50 to 54176.50 0.04 0.04 - 0.25 - - EOP(NOAA) 96 P 1 0.01 0.01 - 0.01 - - 53 54134.50 to 54186.50 0.09 0.10 - 0.21 - - EOP(SIO) 96 P 1 0.04 0.05 - 0.12 - - 54 54134.50 to 54187.50 0.08 0.28 - 0.24 - - EOP(IGS F)95 P 2 0.01 0.02 0.08 0.04 - - 43 54134.50 to 54176.50 0.02 0.05 0.15 0.09 - - EOP(IGS R)96 P 2 0.03 0.04 0.18 0.07 - - 54 54134.50 to 54187.50 0.05 0.07 0.72 0.21 - - EOP(IERS) 97 P 1 0.03 0.03 0.15 0.10 - - 54 54134.50 to 54187.50 0.03 0.02 0.24 0.12 - - SLR EOP(ASI) 3 L 2 0.07 0.07 - 0.00 - - 53 54134.50 to 54186.50 0.29 0.25 - 0.00 - - EOP(IAA) 2 L 1 0.04 0.04 0.02 0.02 - - 55 54134.00 to 54188.00 0.14 0.13 0.24 0.25 - - EOP(MCC) 97 L 1 0.14 0.14 - 0.10 - - 34 54134.00 to 54181.00 0.28 0.15 - 2.64 - - EOP(ILRS) 5 L 1 0.08 0.07 - 0.15 - - 50 54134.50 to 54183.50 0.13 0.14 - 0.41 - - Bulletin A EOP(NEOS) 97 C 1 0.06 0.06 0.09 - - - 55 54134.00 to 54188.00 0.05 0.04 0.09 - - -