BULLETIN B 232 4 June 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. APR 4 54194 0.03076 0.48179 -0.069192 -33.069192 -55.0 -6.2 APR 9 54199 0.04152 0.48644 -0.077292 -33.077292 -54.5 -6.9 APR 14 54204 0.04885 0.48890 -0.085229 -33.085229 -54.9 -7.1 APR 19 54209 0.05824 0.49005 -0.092478 -33.092478 -56.2 -6.3 APR 24 54214 0.06528 0.49015 -0.098922 -33.098922 -54.9 -7.9 APR 29 54219 0.07527 0.49091 -0.104791 -33.104791 -54.9 -6.4 MAY 4 54224 0.08515 0.48960 -0.110922 -33.110922 -54.6 -7.7 Preliminary extension, to be updated weekly in Bulletin A and monthly in Bulletin B. MAY 9 54229 0.09551 0.48557 -0.117021 -33.117021 -54.1 -7.9 MAY 14 54234 0.10656 0.48219 -0.123651 -33.123651 -55.0 -7.0 MAY 19 54239 0.11918 0.47768 -0.130542 -33.130542 -56.5 -7.3 MAY 24 54244 0.12902 0.47239 -0.136140 -33.136140 -56.1 -6.6 MAY 29 54249 0.13892 0.46706 -0.141019 -33.141019 -56.4 -6.6 JUN 3 54254 0.14988 0.45965 -0.145481 -33.145481 -57.0 -7.3 JUN 8 54259 0.15794 0.45330 -0.149242 -33.149242 -57.0 -7.0 JUN 13 54264 0.16532 0.44641 -0.152470 -33.152470 -58.3 -6.4 JUN 18 54269 0.17209 0.43890 -0.155270 -33.155270 -58.3 -7.0 JUN 23 54274 0.17825 0.43079 -0.157696 -33.157696 -59.7 -6.3 JUN 28 54279 0.18375 0.42213 -0.159817 -33.159817 -60.4 -6.6 JUL 3 54284 0.18856 0.41297 -0.161678 -33.161678 -61.1 -6.3 JUL 8 54289 0.19265 0.40335 -0.163342 -33.163342 -61.9 -6.3 JUL 13 54294 0.19596 0.39332 -0.164845 -33.164845 -62.9 -6.5 JUL 18 54299 0.19849 0.38294 -0.166241 -33.166241 -62.6 -6.1 JUL 23 54304 0.20020 0.37224 -0.167583 -33.167583 -64.7 -6.4 JUL 28 54309 0.20108 0.36131 -0.168926 -33.168926 -65.3 -6.6 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 232 (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" APR 4 54194 0.03076 0.48179 -0.069971 -0.779 1.487 -55.0 -6.2 APR 5 54195 0.03329 0.48288 -0.071427 -0.757 1.407 -55.0 -6.3 APR 6 54196 0.03582 0.48385 -0.072782 -0.561 1.294 -55.0 -6.5 APR 7 54197 0.03820 0.48491 -0.074023 -0.200 1.222 -54.9 -6.7 APR 8 54198 0.04015 0.48569 -0.075243 0.290 1.198 -54.7 -6.8 APR 9 54199 0.04152 0.48644 -0.076445 0.847 1.222 -54.5 -6.9 APR 10 54200 0.04267 0.48705 -0.077638 1.388 1.179 -54.4 -7.1 APR 11 54201 0.04412 0.48750 -0.078898 1.812 1.285 -54.3 -7.2 APR 12 54202 0.04565 0.48810 -0.080281 2.015 1.470 -54.4 -7.3 APR 13 54203 0.04711 0.48857 -0.081859 1.915 1.733 -54.6 -7.3 APR 14 54204 0.04885 0.48890 -0.083743 1.487 2.031 -54.9 -7.1 APR 15 54205 0.05049 0.48934 -0.085888 0.786 2.234 -55.2 -6.7 APR 16 54206 0.05232 0.48977 -0.088153 -0.049 2.300 -55.5 -6.4 APR 17 54207 0.05437 0.49013 -0.090422 -0.830 2.166 -55.8 -6.1 APR 18 54208 0.05637 0.49013 -0.092434 -1.382 1.837 -56.0 -6.1 APR 19 54209 0.05824 0.49005 -0.094078 -1.600 1.437 -56.2 -6.3 APR 20 54210 0.05986 0.49006 -0.095325 -1.482 1.058 -56.2 -6.8 APR 21 54211 0.06135 0.49016 -0.096236 -1.119 0.846 -56.1 -7.2 APR 22 54212 0.06263 0.49008 -0.097066 -0.649 0.803 -55.7 -7.6 APR 23 54213 0.06384 0.49013 -0.097882 -0.206 0.859 -55.3 -7.9 APR 24 54214 0.06528 0.49015 -0.098808 0.114 0.965 -54.9 -7.9 APR 25 54215 0.06692 0.49012 -0.099820 0.264 1.104 -54.7 -7.7 APR 26 54216 0.06893 0.49029 -0.101011 0.244 1.265 -54.7 -7.4 APR 27 54217 0.07111 0.49068 -0.102336 0.082 1.385 -54.7 -7.0 APR 28 54218 0.07312 0.49092 -0.103764 -0.174 1.509 -54.8 -6.6 APR 29 54219 0.07527 0.49091 -0.105254 -0.462 1.475 -54.9 -6.4 APR 30 54220 0.07721 0.49085 -0.106692 -0.718 1.433 -54.8 -6.5 MAY 1 54221 0.07916 0.49080 -0.108060 -0.879 1.300 -54.7 -6.7 MAY 2 54222 0.08093 0.49066 -0.109279 -0.896 1.158 -54.5 -7.2 MAY 3 54223 0.08284 0.49025 -0.110370 -0.743 1.028 -54.5 -7.5 MAY 4 54224 0.08515 0.48960 -0.111343 -0.421 0.888 -54.6 -7.7 MAY 5 54225 0.08748 0.48891 -0.112161 0.040 0.757 -54.5 -7.8 MAY 6 54226 0.08960 0.48801 -0.112879 0.585 0.670 -54.5 -7.8 MAY 7 54227 0.09168 0.48699 -0.113530 1.134 0.655 -54.3 -7.8 MAY 8 54228 0.09367 0.48626 -0.114220 1.598 0.786 -54.2 -7.8 MAY 9 54229 0.09551 0.48557 -0.115136 1.885 1.041 -54.1 -7.9 MAY 10 54230 0.09746 0.48471 -0.116324 1.917 1.349 -54.0 -7.9 MAY 11 54231 0.09967 0.48414 -0.117840 1.654 1.665 -54.0 -7.8 MAY 12 54232 0.10161 0.48362 -0.119638 1.115 2.019 -54.2 -7.6 MAY 13 54233 0.10395 0.48292 -0.121837 0.391 2.219 -54.5 -7.2 MAY 14 54234 0.10656 0.48219 -0.124018 -0.368 2.158 -55.0 -7.0 MAY 15 54235 0.10953 0.48140 -0.126097 -0.990 1.933 -55.5 -6.8 MAY 16 54236 0.11234 0.48059 -0.127850 -1.340 1.565 -56.1 -7.0 MAY 17 54237 0.11492 0.47968 -0.129225 -1.363 1.221 -56.5 -7.2 MAY 18 54238 0.11712 0.47875 -0.130321 -1.105 0.976 -56.6 -7.5 MAY 19 54239 0.11918 0.47768 -0.131226 -0.683 0.853 -56.5 -7.3 MAY 20 54240 0.12095 0.47659 -0.132073 -0.242 0.906 -55.9 -7.5 MAY 21 54241 0.12254 0.47519 -0.133069 0.099 0.886 -55.3 -7.6 MAY 22 54242 0.12435 0.47367 -0.133977 0.271 0.926 -55.2 -7.4 MAY 23 54243 0.12676 0.47282 -0.134917 0.263 1.037 -55.6 -7.0 MAY 24 54244 0.12902 0.47239 -0.136037 0.103 1.217 -56.1 -6.6 MAY 25 54245 0.13143 0.47157 -0.137332 -0.159 1.313 -56.4 -6.5 MAY 26 54246 0.13372 0.47070 -0.138641 -0.460 1.282 -56.4 -6.5 MAY 27 54247 0.13553 0.46987 -0.139867 -0.737 1.151 -56.3 -6.5 MAY 28 54248 0.13717 0.46862 -0.141002 -0.930 1.084 -56.2 -6.5 MAY 29 54249 0.13892 0.46706 -0.142008 -0.989 0.923 -56.4 -6.6 MAY 30 54250 0.14068 0.46546 -0.142845 -0.882 0.747 -56.6 -6.9 MAY 31 54251 0.14357 0.46340 -0.143497 -0.604 0.590 -56.8 -7.2 JUN 1 54252 0.14619 0.46198 -0.143988 -0.177 0.344 -57.0 -7.4 IERS, B 232 (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" APR 4 54194 0.03079 0.48178 -0.069969 -54.91 -5.96 0.02 0.02 0.01 0.05 0.02 APR 9 54199 0.04155 0.48642 -0.076444 -54.31 -6.80 0.02 0.02 0.01 0.05 0.02 APR 14 54204 0.04885 0.48891 -0.083736 -54.87 -7.13 0.02 0.02 0.02 0.11 0.05 APR 19 54209 0.05826 0.49006 -0.094076 -56.19 -6.37 0.02 0.02 0.01 0.05 0.02 APR 24 54214 0.06530 0.49015 -0.098808 -54.23 -7.67 0.01 0.01 0.01 0.12 0.05 APR 29 54219 0.07526 0.49092 -0.105253 -54.86 -6.44 0.01 0.01 0.01 0.07 0.04 MAY 4 54224 0.08515 0.48959 -0.111344 -54.50 -7.64 0.02 0.02 0.02 0.08 0.03 MAY 9 54229 0.09552 0.48556 -0.115133 -54.08 -7.86 0.01 0.01 0.01 0.05 0.02 MAY 14 54234 0.10656 0.48219 -0.124019 -54.95 -6.96 0.02 0.02 0.02 0.12 0.04 MAY 19 54239 0.11919 0.47768 -0.131230 -56.48 -7.45 0.02 0.02 0.02 0.35 0.14 MAY 24 54244 0.12902 0.47239 -0.136035 - - 0.01 0.01 0.01 - - MAY 29 54249 0.13892 0.46707 -0.142028 - - 0.01 0.01 0.05 - - 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) APR 4 54194 0.00143 72.921 15026 APR 9 54199 0.00179 14995 APR 14 54204 0.00145 15024 APR 19 54209 0.00140 15029 APR 24 54214 0.00121 15045 APR 29 54219 0.00120 15046 MAY 4 54224 0.00129 15038 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 232 (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 0.08 0.08 0.03 - 0.16 0.07 13 54195.27 to 54238.27 0.11 0.09 0.07 - 0.62 0.13 EOP(BKG) 3 R 4 0.07 0.06 0.03 - 0.11 0.06 7 54195.27 to 54224.27 0.11 0.07 0.06 - 0.14 0.11 EOP(BKG) 3 R 2 - - 0.09 - - - 47 54194.79 to 54247.33 - - 0.18 - - - EOP(USNO) 5 R 1 - - 0.10 - - - 52 54194.79 to 54247.33 - - 0.14 - - - EOP(GSFC) 6 R 1 - - 0.09 - - - 49 54194.79 to 54247.33 - - 0.13 - - - EOP(IAA) 5 R 2 0.06 0.05 0.03 - - - 10 54195.27 to 54231.27 0.15 0.15 0.06 - - - EOP(IAA) 5 R 1 - - 0.09 - - - 49 54194.79 to 54247.33 - - 0.16 - - - EOP(SPBU) 3 R 3 0.28 0.38 0.17 - 0.07 0.03 5 54195.27 to 54224.27 0.26 0.35 0.08 - 0.08 0.10 EOP(SPBU) 2 R 1 - - 0.09 - - - 45 54194.79 to 54243.79 - - 0.13 - - - EOP(MAO) 3 R 1 0.07 0.08 0.04 - - - 9 54195.31 to 54231.29 0.04 0.12 0.04 - - - EOP(GSFC) 6 R 1 0.21 0.08 0.11 - 0.20 0.09 14 54195.27 to 54238.27 0.10 0.09 0.10 - 0.21 0.09 EOP(USNO) 6 R 2 0.06 0.06 0.02 - 0.14 0.06 10 54195.27 to 54238.27 0.09 0.08 0.02 - 0.10 0.10 EOP(IVS) 7 R 1 0.04 0.04 0.02 - 0.22 0.04 9 54195.27 to 54231.27 0.10 0.13 0.03 - 0.13 0.12 GPS EOP(CODE) 98 P 1 0.01 0.01 - 0.07 - - 58 54194.50 to 54251.50 0.05 0.06 - 0.15 - - EOP(EMR) 96 P 3 0.03 0.03 - 0.04 - - 57 54194.50 to 54250.50 0.09 0.06 - 0.65 - - EOP(ESOC) 96 P 1 0.01 0.01 - 0.04 - - 57 54194.50 to 54250.50 0.04 0.09 - 0.32 - - EOP(GFZ) 96 P 2 0.01 0.01 - 0.01 - - 57 54194.50 to 54250.50 0.04 0.16 - 0.15 - - EOP(IAA) 1 P 1 0.04 0.04 - 0.07 - - 54 54194.50 to 54247.50 0.13 0.56 - 0.35 - - EOP(JPL) 96 P 3 0.02 0.02 - 0.13 - - 46 54194.50 to 54239.50 0.04 0.03 - 0.41 - - EOP(NOAA) 96 P 1 0.01 0.01 - 0.01 - - 46 54194.50 to 54239.50 0.07 0.16 - 0.17 - - EOP(SIO) 96 P 1 0.05 0.05 - 0.12 - - 51 54194.50 to 54244.50 0.05 0.35 - 0.41 - - EOP(IGS F)95 P 2 0.01 0.01 0.06 0.03 - - 17 54216.50 to 54232.50 0.02 0.07 0.12 0.13 - - EOP(IGS R)96 P 2 0.02 0.04 0.16 0.05 - - 57 54194.50 to 54250.50 0.04 0.09 0.54 0.14 - - EOP(IERS) 97 P 1 0.03 0.03 0.22 0.12 - - 58 54194.50 to 54251.50 0.02 0.01 0.23 0.13 - - SLR EOP(ASI) 3 L 2 0.06 0.07 - 0.15 - - 56 54194.50 to 54249.50 0.18 0.16 - 0.57 - - EOP(IAA) 2 L 1 0.05 0.05 0.03 0.03 - - 56 54194.00 to 54249.00 0.18 0.19 0.52 0.26 - - EOP(MCC) 97 L 1 0.12 0.14 - 0.10 - - 35 54203.00 to 54244.00 0.23 0.19 - 3.14 - - EOP(ILRS) 5 L 1 0.05 0.06 - 0.13 - - 53 54194.50 to 54246.50 0.20 0.14 - 0.39 - - Bulletin A EOP(NEOS) 97 C 1 0.07 0.07 0.11 - - - 59 54194.00 to 54252.00 0.06 0.04 0.09 - - -