BULLETIN B 234 (IAU 2000) 31 July 2007 ============================================================================== Following IAU Conventions 2000, IERS provides new products dX, dY, celestial pole offsets with respect to the new IAU2000A Precession-Nutation theory . The present Bulletin B version includes the celestial pole offsets dX, dY: dX = X_obs - X_IAU2000A and dY = Y_obs - Y_IAU2000A where X_obs, Y_obs are the observed coordinates of the Celestial Intermediate Pole (CIP) in the Geocentric Celestial Reference System, and X_IAU2000A, Y_IAU2000A are the celestial pole coordinates provided by using the IAU2000A Precession-Nutation theory. The current Bulletin B including (dpsi,deps)_1980 will be maintained as long as necessary. For more details refer to IERS Messages 38, on IAU 2000 Resolution Compliancy Information. ============================================================================== 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 dX dY 2007 " " s s 0.001" 0.001" (0h UTC) Final Bulletin B values. JUN 3 54254 0.15157 0.45898 -0.145293 -33.145293 0.25 -0.38 JUN 8 54259 0.16239 0.45154 -0.148436 -33.148436 0.16 -0.33 JUN 13 54264 0.17333 0.44333 -0.150856 -33.150856 0.06 -0.42 JUN 18 54269 0.18249 0.43365 -0.152860 -33.152860 0.08 -0.36 JUN 23 54274 0.19363 0.42498 -0.154945 -33.154945 0.09 -0.39 JUN 28 54279 0.20519 0.41643 -0.157095 -33.157095 0.17 -0.43 JUL 3 54284 0.20979 0.40727 -0.159421 -33.159421 0.00 -0.52 Preliminary extension, to be updated weekly in Bulletin A and monthly in Bulletin B. JUL 8 54289 0.21518 0.39632 -0.161163 -33.161163 -0.03 -0.39 JUL 13 54294 0.21947 0.38319 -0.162176 -33.162176 0.13 -0.41 JUL 18 54299 0.22589 0.37049 -0.162647 -33.162647 0.05 -0.61 JUL 23 54304 0.22971 0.35703 -0.162754 -33.162754 0.00 0.00 JUL 28 54309 0.22925 0.34583 -0.162462 -33.162462 0.00 0.00 AUG 2 54314 0.22763 0.33130 -0.163459 -33.163459 0.00 0.00 AUG 7 54319 0.22785 0.31574 -0.164930 -33.164930 0.00 0.00 AUG 12 54324 0.22488 0.30185 -0.166586 -33.166586 0.00 0.00 AUG 17 54329 0.22113 0.28718 -0.168466 -33.168466 0.00 0.00 AUG 22 54334 0.21598 0.27252 -0.170614 -33.170614 0.00 0.00 AUG 27 54339 0.21213 0.25902 -0.173026 -33.173026 0.00 0.00 SEP 1 54344 0.20485 0.24686 -0.175802 -33.175802 0.00 0.00 SEP 6 54349 0.19825 0.23259 -0.178934 -33.178934 0.00 0.00 SEP 11 54354 0.19037 0.21835 -0.182414 -33.182414 0.00 0.00 SEP 16 54359 0.18113 0.20495 -0.186284 -33.186284 0.00 0.00 SEP 21 54364 0.17210 0.19350 -0.190507 -33.190507 0.00 0.00 SEP 26 54369 0.15845 0.18230 -0.195088 -33.195088 0.00 0.00 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, dX, and dY. IERS, B 234 (2) 2 - SMOOTHED VALUES OF x, y, UT1, D, dX, dY (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. 2007 MJD x y UT1-UTC UT1-UT1R D dX dY (0 h UTC) " " s ms ms 0.001" 0.001" JUN 3 54254 0.15157 0.45898 -0.144401 0.893 0.156 0.25 -0.38 JUN 4 54255 0.15387 0.45739 -0.144548 1.371 0.249 0.14 -0.42 JUN 5 54256 0.15641 0.45598 -0.144930 1.692 0.461 0.06 -0.43 JUN 6 54257 0.15873 0.45477 -0.145527 1.784 0.681 0.04 -0.40 JUN 7 54258 0.16058 0.45323 -0.146281 1.608 0.869 0.09 -0.36 JUN 8 54259 0.16239 0.45154 -0.147258 1.178 1.028 0.16 -0.33 JUN 9 54260 0.16443 0.45007 -0.148330 0.562 1.130 0.19 -0.35 JUN 10 54261 0.16674 0.44869 -0.149468 -0.122 1.142 0.18 -0.41 JUN 11 54262 0.16914 0.44726 -0.150525 -0.729 1.030 0.14 -0.46 JUN 12 54263 0.17133 0.44548 -0.151451 -1.127 0.769 0.09 -0.47 JUN 13 54264 0.17333 0.44333 -0.152092 -1.236 0.427 0.06 -0.42 JUN 14 54265 0.17505 0.44124 -0.152322 -1.062 0.146 0.04 -0.34 JUN 15 54266 0.17663 0.43919 -0.152383 -0.686 -0.035 0.04 -0.27 JUN 16 54267 0.17836 0.43719 -0.152315 -0.242 -0.038 0.04 -0.25 JUN 17 54268 0.18030 0.43538 -0.152315 0.138 0.105 0.05 -0.29 JUN 18 54269 0.18249 0.43365 -0.152501 0.358 0.261 0.08 -0.36 JUN 19 54270 0.18481 0.43200 -0.152870 0.385 0.456 0.13 -0.42 JUN 20 54271 0.18714 0.43069 -0.153434 0.238 0.639 0.17 -0.46 JUN 21 54272 0.18940 0.42931 -0.154134 -0.032 0.735 0.18 -0.45 JUN 22 54273 0.19154 0.42728 -0.154890 -0.356 0.748 0.15 -0.42 JUN 23 54274 0.19363 0.42498 -0.155611 -0.666 0.674 0.09 -0.39 JUN 24 54275 0.19569 0.42288 -0.156207 -0.899 0.571 0.02 -0.37 JUN 25 54276 0.19801 0.42088 -0.156737 -1.005 0.462 0.00 -0.37 JUN 26 54277 0.20072 0.41917 -0.157104 -0.948 0.320 0.03 -0.39 JUN 27 54278 0.20325 0.41780 -0.157319 -0.719 0.157 0.10 -0.41 JUN 28 54279 0.20519 0.41643 -0.157427 -0.332 0.042 0.17 -0.43 JUN 29 54280 0.20673 0.41489 -0.157427 0.167 -0.029 0.21 -0.43 JUN 30 54281 0.20793 0.41334 -0.157391 0.710 -0.057 0.18 -0.41 JUL 1 54282 0.20865 0.41168 -0.157351 1.205 0.013 0.12 -0.41 JUL 2 54283 0.20912 0.40959 -0.157398 1.557 0.184 0.04 -0.45 JUL 3 54284 0.20979 0.40727 -0.157736 1.685 0.438 0.00 -0.52 JUL 4 54285 0.21072 0.40516 -0.158311 1.546 0.675 -0.01 -0.59 JUL 5 54286 0.21181 0.40309 -0.159097 1.151 0.835 0.01 -0.61 JUL 6 54287 0.21312 0.40091 -0.159980 0.570 0.940 0.02 -0.56 JUL 7 54288 0.21436 0.39868 -0.160927 -0.083 0.948 0.00 -0.47 JUL 8 54289 0.21518 0.39632 -0.161837 -0.674 0.766 -0.03 -0.39 JUL 9 54290 0.21584 0.39378 -0.162444 -1.081 0.494 -0.04 -0.37 JUL 10 54291 0.21669 0.39108 -0.162783 -1.226 0.214 -0.01 -0.40 JUL 11 54292 0.21766 0.38835 -0.162863 -1.097 -0.034 0.06 -0.46 JUL 12 54293 0.21851 0.38577 -0.162721 -0.751 -0.202 0.12 -0.49 JUL 13 54294 0.21947 0.38319 -0.162476 -0.300 -0.294 0.13 -0.41 JUL 14 54295 0.22079 0.38051 -0.162170 0.126 -0.258 0.06 -0.30 JUL 15 54296 0.22203 0.37789 -0.162014 0.417 -0.103 -0.02 -0.29 JUL 16 54297 0.22317 0.37544 -0.161995 0.513 0.076 -0.06 -0.39 JUL 17 54298 0.22451 0.37300 -0.162159 0.412 0.227 -0.04 -0.51 JUL 18 54299 0.22589 0.37049 -0.162489 0.158 0.341 0.05 -0.61 JUL 19 54300 0.22706 0.36804 -0.162889 -0.178 0.394 0.15 -0.61 JUL 20 54301 0.22787 0.36543 -0.163263 -0.520 0.329 0.17 -0.45 JUL 21 54302 0.22850 0.36260 -0.163560 -0.797 0.220 0.00 0.00 JUL 22 54303 0.22911 0.35971 -0.163739 -0.953 0.069 0.00 0.00 JUL 23 54304 0.22971 0.35703 -0.163704 -0.950 -0.110 0.00 0.00 JUL 24 54305 0.23014 0.35504 -0.163498 -0.772 -0.287 0.00 0.00 JUL 25 54306 0.23022 0.35296 -0.163159 -0.429 -0.489 0.00 0.00 JUL 26 54307 0.23023 0.35068 -0.162576 0.043 -0.598 0.00 0.00 JUL 27 54308 0.23004 0.34844 -0.161937 0.582 -0.615 0.00 0.00 JUL 28 54309 0.22925 0.34583 -0.161360 1.102 -0.530 0.00 0.00 IERS, B 234 (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 dX dY x y UT1 dX dY (0 h UTC) " " s 0.001" 0.001" 0.0001s 0.001" JUN 3 54254 0.15155 0.45896 -0.144397 0.310 -.390 0.01 0.01 0.01 0.05 0.04 JUN 8 54259 0.16237 0.45153 -0.147248 0.153 -.330 0.01 0.01 0.02 0.09 0.09 JUN 13 54264 0.17331 0.44331 -0.152089 0.049 -.375 0.01 0.01 0.02 0.04 0.03 JUN 18 54269 0.18246 0.43363 -0.152501 0.092 -.335 0.01 0.01 0.03 0.06 0.05 JUN 23 54274 0.19360 0.42497 -0.155606 0.087 -.371 0.01 0.01 0.02 0.04 0.04 JUN 28 54279 0.20517 0.41640 -0.157425 0.189 -.430 0.01 0.01 0.02 0.04 0.03 JUL 3 54284 0.20978 0.40725 -0.157729 0.005 -.470 0.01 0.01 0.01 0.03 0.03 JUL 8 54289 0.21515 0.39631 -0.161828 -.018 -.343 0.01 0.02 0.02 0.04 0.03 JUL 13 54294 0.21945 0.38317 -0.162479 0.140 -.471 0.01 0.01 0.04 0.15 0.14 JUL 18 54299 0.22590 0.37040 -0.162486 0.008 -.639 0.03 0.03 0.02 0.07 0.05 JUL 23 54304 0.22973 0.35695 -0.163707 - - 0.04 0.05 0.07 - - JUL 28 54309 0.22921 0.34579 -0.161361 - - 0.03 0.04 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) JUN 3 54254 0.00069 72.921 15089 JUN 8 54259 0.00049 15105 JUN 13 54264 0.00047 15107 JUN 18 54269 0.00039 15114 JUN 23 54274 0.00040 15113 JUN 28 54279 0.00050 15104 JUL 3 54284 0.00044 15110 5 - INFORMATION ON TIME SCALES No leap second will be introduced in UTC on 31 December 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 234 (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. Units : 0.001" for x,y , 0.0001s for UT1, 0.001" for dX, dY. -------------------------------------------------------------------------------- EOP series Mean formal uncertainty Periods covered Weighted RMS agreement with Bulletin B -------------------------------------------------------------------------------- x y UT D dX dY Data Number VLBI EOP(AUS) 1 R 1 0.06 0.09 0.03 - - - 11 54256.21 to 54291.21 0.10 0.07 0.04 - - - EOP(BKG) 3 R 4 0.09 0.09 0.06 - - - 15 54256.21 to 54301.29 0.07 0.15 0.07 - - - EOP(BKG) 3 R 2 - - 0.09 - - - 50 54254.33 to 54308.80 - - 0.12 - - - EOP(USNO) 5 R 1 - - 0.10 - - - 51 54254.33 to 54306.79 - - 0.14 - - - EOP(GSFC) 6 R 1 - - 0.10 - - - 52 54254.33 to 54308.80 - - 0.11 - - - EOP(IAA) 5 R 2 0.06 0.08 0.03 - 0.04 0.05 12 54256.21 to 54301.29 0.06 0.12 0.08 - 0.04 0.03 EOP(IAA) 5 R 1 - - 0.09 - - - 52 54254.33 to 54308.80 - - 0.15 - - - EOP(SPBU) 2 R 1 - - 0.10 - - - 7 54254.33 to 54261.33 - - 0.13 - - - EOP(MAO) 3 R 1 0.07 0.11 0.04 - 0.05 0.06 10 54256.24 to 54287.29 0.05 0.09 0.04 - 0.07 0.06 EOP(GSFC) 6 R 1 0.10 0.13 0.07 - - - 15 54256.21 to 54301.27 0.08 0.14 0.08 - - - EOP(USNO) 6 R 2 0.07 0.08 0.03 - - - 14 54256.21 to 54301.27 0.08 0.10 0.05 - - - EOP(IVS) 7 R 1 0.05 0.06 0.02 - - - 14 54256.21 to 54301.29 0.09 0.16 0.08 - - - GPS EOP(CODE) 98 P 1 0.01 0.01 - 0.06 - - 55 54254.50 to 54308.50 0.02 0.03 - 0.13 - - EOP(EMR) 96 P 3 0.03 0.03 - 0.04 - - 55 54254.50 to 54308.50 0.06 0.11 - 0.21 - - EOP(ESOC) 96 P 1 0.01 0.01 - 0.03 - - 54 54254.50 to 54307.50 0.05 0.06 - 0.47 - - EOP(GFZ) 96 P 2 0.01 0.01 - 0.01 - - 55 54254.50 to 54308.50 0.02 0.03 - 0.25 - - EOP(IAA) 1 P 1 0.03 0.03 - 0.06 - - 55 54254.50 to 54308.50 0.23 0.81 - 0.22 - - EOP(JPL) 96 P 3 0.02 0.02 - 0.10 - - 42 54254.50 to 54295.50 0.04 0.06 - 0.20 - - EOP(NOAA) 96 P 1 0.01 0.01 - 0.01 - - 45 54254.50 to 54298.50 0.11 0.07 - 0.26 - - EOP(SIO) 96 P 1 0.05 0.05 - 0.12 - - 55 54254.50 to 54308.50 0.07 0.07 - 0.16 - - EOP(IGS R)96 P 2 0.02 0.03 0.15 0.05 - - 55 54254.50 to 54308.50 0.05 0.04 0.53 0.12 - - EOP(IGS) 0 P 3 0.02 0.02 0.09 0.09 - - 42 54254.50 to 54295.50 0.01 0.01 0.22 0.12 - - EOP(IERS) 97 P 1 0.03 0.03 0.13 0.09 - - 55 54254.50 to 54308.50 0.03 0.04 0.32 0.15 - - SLR EOP(ASI) 3 L 2 0.07 0.08 - 0.16 - - 52 54254.50 to 54305.50 0.22 0.41 - 0.53 - - EOP(IAA) 2 L 1 0.04 0.04 0.02 0.02 - - 56 54254.00 to 54309.00 0.18 0.13 0.25 0.18 - - EOP(MCC) 97 L 1 0.16 0.16 - 0.10 - - 47 54254.00 to 54300.00 0.16 0.15 - 2.57 - - EOP(ILRS) 5 L 1 0.07 0.07 - 0.15 - - 49 54254.50 to 54302.50 0.21 0.20 - 0.60 - - Bulletin A EOP(NEOS) 97 C 1 0.08 0.07 0.13 - - - 56 54254.00 to 54309.00 0.04 0.04 0.12 - - -