BULLETIN B 206 1 april 2005 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 2005 " " s s 0.001" 0.001" (0h UTC) Final Bulletin B values. FEB 3 53404 0.08667 0.20685 -0.522104 -32.522104 -55.4 -1.7 FEB 8 53409 0.07315 0.20528 -0.525106 -32.525106 -55.6 -2.4 FEB 13 53414 0.05918 0.20291 -0.529237 -32.529237 -55.4 -1.9 FEB 18 53419 0.04591 0.20306 -0.533737 -32.533737 -55.6 -2.9 FEB 23 53424 0.03320 0.20603 -0.539370 -32.539370 -54.7 -2.8 FEB 28 53429 0.02589 0.20965 -0.545675 -32.545675 -55.2 -2.7 MAR 5 53434 0.01518 0.21570 -0.552579 -32.552579 -54.8 -3.4 Preliminary extension, to be updated weekly in Bulletin A and monthly in Bulletin B. MAR 10 53439 0.00489 0.21932 -0.558265 -32.558265 -54.0 -3.3 MAR 15 53444 -0.00365 0.22314 -0.562376 -32.562376 -55.1 -3.7 MAR 20 53449 -0.00973 0.22566 -0.565507 -32.565507 -53.5 -3.9 MAR 25 53454 -0.01652 0.23264 -0.568843 -32.568843 -51.2 -2.8 MAR 30 53459 -0.02461 0.24036 -0.572549 -32.572549 -52.7 -3.2 APR 4 53464 -0.03295 0.24673 -0.575958 -32.575958 -50.4 -4.3 APR 9 53469 -0.03999 0.25387 -0.579498 -32.579498 -50.3 -3.9 APR 14 53474 -0.04647 0.26157 -0.582901 -32.582901 -50.8 -4.5 APR 19 53479 -0.05233 0.26965 -0.586136 -32.586136 -49.7 -4.9 APR 24 53484 -0.05756 0.27811 -0.589172 -32.589172 -50.0 -4.4 APR 29 53489 -0.06211 0.28686 -0.591995 -32.591995 -50.7 -4.9 MAY 4 53494 -0.06600 0.29588 -0.594559 -32.594559 -49.2 -5.0 MAY 9 53499 -0.06920 0.30509 -0.596832 -32.596832 -50.7 -4.6 MAY 14 53504 -0.07171 0.31446 -0.598808 -32.598808 -50.0 -5.5 MAY 19 53509 -0.07352 0.32391 -0.600464 -32.600464 -49.8 -5.0 MAY 24 53514 -0.07465 0.33342 -0.601768 -32.601768 -51.7 -4.9 MAY 29 53519 -0.07508 0.34292 -0.602722 -32.602722 -50.9 -5.4 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 206 (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 2003 IERS Annual Report. 2005 MJD x y UT1-UTC UT1-UT1R D dPsi dEpsilon (0 h UTC) " " s ms ms 0.001" 0.001" FEB 3 53404 0.08667 0.20685 -0.522426 -0.322 0.426 -55.4 -1.7 FEB 4 53405 0.08392 0.20604 -0.522755 -0.208 0.267 -55.7 -1.8 FEB 5 53406 0.08157 0.20585 -0.522978 0.096 0.160 -55.9 -2.0 FEB 6 53407 0.07892 0.20558 -0.523116 0.499 0.342 -56.0 -2.2 FEB 7 53408 0.07610 0.20577 -0.523714 0.860 0.457 -55.9 -2.4 FEB 8 53409 0.07315 0.20528 -0.524073 1.033 0.581 -55.6 -2.4 FEB 9 53410 0.07003 0.20502 -0.524895 0.922 0.990 -55.3 -2.2 FEB 10 53411 0.06686 0.20409 -0.526038 0.521 1.303 -55.0 -2.0 FEB 11 53412 0.06412 0.20361 -0.527460 -0.085 1.517 -54.9 -1.9 FEB 12 53413 0.06167 0.20315 -0.529021 -0.755 1.583 -55.0 -1.8 FEB 13 53414 0.05918 0.20291 -0.530580 -1.342 1.444 -55.4 -1.9 FEB 14 53415 0.05748 0.20302 -0.531881 -1.736 1.205 -55.8 -2.0 FEB 15 53416 0.05456 0.20327 -0.532982 -1.879 0.932 -56.1 -2.1 FEB 16 53417 0.05210 0.20299 -0.533752 -1.771 0.647 -56.1 -2.4 FEB 17 53418 0.04825 0.20283 -0.534293 -1.448 0.464 -55.9 -2.6 FEB 18 53419 0.04591 0.20306 -0.534703 -0.966 0.402 -55.6 -2.9 FEB 19 53420 0.04238 0.20371 -0.535122 -0.399 0.478 -55.3 -3.0 FEB 20 53421 0.04051 0.20436 -0.535685 0.179 0.576 -55.0 -3.1 FEB 21 53422 0.03757 0.20513 -0.536298 0.691 0.702 -54.8 -3.0 FEB 22 53423 0.03571 0.20559 -0.537108 1.072 0.892 -54.7 -2.9 FEB 23 53424 0.03320 0.20603 -0.538094 1.276 1.092 -54.7 -2.8 FEB 24 53425 0.03176 0.20599 -0.539294 1.280 1.314 -54.7 -2.6 FEB 25 53426 0.03033 0.20657 -0.540713 1.095 1.510 -54.8 -2.5 FEB 26 53427 0.02943 0.20740 -0.542295 0.765 1.694 -54.9 -2.5 FEB 27 53428 0.02772 0.20853 -0.544073 0.359 1.723 -55.0 -2.6 FEB 28 53429 0.02589 0.20965 -0.545711 -0.036 1.646 -55.2 -2.7 MAR 1 53430 0.02411 0.21109 -0.547336 -0.329 1.571 -55.3 -2.8 MAR 2 53431 0.02188 0.21275 -0.548833 -0.447 1.383 -55.3 -3.0 MAR 3 53432 0.01944 0.21397 -0.550097 -0.352 1.187 -55.2 -3.1 MAR 4 53433 0.01716 0.21493 -0.551220 -0.056 1.040 -55.0 -3.2 MAR 5 53434 0.01518 0.21570 -0.552211 0.369 0.969 -54.8 -3.4 MAR 6 53435 0.01283 0.21647 -0.553204 0.802 0.905 -54.6 -3.5 MAR 7 53436 0.01057 0.21688 -0.554067 1.101 0.994 -54.4 -3.6 MAR 8 53437 0.00891 0.21763 -0.555222 1.150 1.220 -54.2 -3.6 MAR 9 53438 0.00674 0.21852 -0.556509 0.895 1.348 -54.0 -3.5 MAR 10 53439 0.00489 0.21932 -0.557890 0.375 1.460 -54.0 -3.3 MAR 11 53440 0.00242 0.22022 -0.559382 -0.295 1.534 -54.1 -3.2 MAR 12 53441 0.00068 0.22103 -0.560906 -0.962 1.477 -54.4 -3.1 MAR 13 53442 -0.00153 0.22199 -0.562296 -1.484 1.255 -54.7 -3.2 MAR 14 53443 -0.00246 0.22225 -0.563396 -1.767 0.931 -55.0 -3.4 MAR 15 53444 -0.00365 0.22314 -0.564158 -1.781 0.587 -55.1 -3.7 MAR 16 53445 -0.00560 0.22300 -0.564584 -1.547 0.290 -54.9 -3.9 MAR 17 53446 -0.00676 0.22360 -0.564760 -1.122 0.099 -54.6 -4.0 MAR 18 53447 -0.00800 0.22378 -0.564808 -0.579 0.028 -54.3 -4.1 MAR 19 53448 -0.00893 0.22470 -0.564843 0.001 0.068 -53.9 -4.1 MAR 20 53449 -0.00973 0.22566 -0.564969 0.538 0.127 -53.5 -3.9 MAR 21 53450 -0.01068 0.22674 -0.565119 0.962 0.224 -53.1 -3.7 MAR 22 53451 -0.01171 0.22823 -0.565431 1.218 0.447 -52.5 -3.4 MAR 23 53452 -0.01314 0.22994 -0.566020 1.276 0.737 -51.9 -3.1 MAR 24 53453 -0.01524 0.23184 -0.566918 1.131 1.005 -51.1 -2.9 MAR 25 53454 -0.01652 0.23264 -0.568028 0.815 1.174 -51.2 -2.8 MAR 26 53455 -0.01771 0.23464 -0.569236 0.391 1.222 -51.4 -2.8 MAR 27 53456 -0.01918 0.23572 -0.570440 -0.051 1.171 -51.7 -2.9 MAR 28 53457 -0.02073 0.23804 -0.571545 -0.410 0.949 -52.1 -3.0 MAR 29 53458 -0.02264 0.23875 -0.572460 -0.596 0.829 -52.5 -3.1 MAR 30 53459 -0.02461 0.24036 -0.573109 -0.560 0.505 -52.7 -3.2 MAR 31 53460 -0.02691 0.24075 -0.573481 -0.304 0.308 -52.7 -3.5 IERS, B 206 (3) 3 - NORMAL VALUES OF THE EARTH ORIENTATION PARAMETERS AT FIVE-DAY INTERVALS (IERS evaluation). Raw normal values Uncertainties 2005 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 53404 0.08666 0.20686 -0.522424 -55.39 -1.66 0.02 0.02 0.02 0.06 0.03 FEB 8 53409 0.07315 0.20528 -0.524070 -55.73 -2.42 0.01 0.02 0.02 0.06 0.02 FEB 13 53414 0.05918 0.20291 -0.530580 -55.40 -1.88 0.01 0.01 0.01 0.05 0.02 FEB 18 53419 0.04588 0.20305 -0.534700 -55.56 -2.81 0.02 0.02 0.02 0.12 0.05 FEB 23 53424 0.03319 0.20603 -0.538090 -54.60 -2.78 0.01 0.01 0.01 0.06 0.02 FEB 28 53429 0.02589 0.20966 -0.545712 -55.19 -2.75 0.02 0.02 0.02 0.10 0.04 MAR 5 53434 0.01518 0.21568 -0.552210 -54.80 -3.34 0.02 0.02 0.01 0.11 0.04 MAR 10 53439 0.00488 0.21931 -0.557891 -53.99 -3.34 0.01 0.01 0.01 0.05 0.02 MAR 15 53444 -0.00363 0.22318 -0.564157 -55.08 -3.67 0.02 0.02 0.02 0.08 0.04 MAR 20 53449 -0.00972 0.22565 -0.564971 -53.53 -3.95 0.01 0.01 0.01 0.09 0.04 MAR 25 53454 -0.01652 0.23264 -0.568023 - - 0.01 0.02 0.03 - - MAR 30 53459 -0.02461 0.24036 - - - 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 2005 MJD s (microrad/s) FEB 3 53404 0.00044 72.921 15110 FEB 8 53409 0.00063 15094 FEB 13 53414 0.00094 15067 FEB 18 53419 0.00094 15067 FEB 23 53424 0.00120 15045 FEB 28 53429 0.00129 15038 MAR 5 53434 0.00143 15026 5 - INFORMATION ON TIME SCALES No leap second was introduced in UTC on 31 December 2004. No leap second will be introduced in UTC on 30 June 2005. 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 206 (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 0.07 0.03 - 0.17 0.07 13 53405.27 to 53447.27 0.17 0.18 0.05 - 0.29 0.09 EOP(BKG) 3 R 4 0.13 0.10 0.08 - 0.22 0.08 14 53405.27 to 53447.27 0.16 0.17 0.06 - 0.20 0.07 EOP(BKG) 3 R 2 - - 0.11 - - - 46 53404.79 to 53452.79 - - 0.13 - - - EOP(USNO) 5 R 1 - - 0.11 - - - 46 53404.79 to 53452.79 - - 0.12 - - - EOP(GSFC) 4 R 2 0.09 0.07 0.07 - 0.16 0.06 14 53405.27 to 53447.27 0.17 0.13 0.08 - 0.08 0.05 EOP(GSFC) 4 R 1 - - 0.11 - - - 46 53404.79 to 53452.79 - - 0.13 - - - EOP(IAA) 5 R 1 0.08 0.07 0.03 - - - 13 53405.27 to 53447.27 0.22 0.16 0.08 - - - EOP(IAA) 3 R 3 - - 0.11 - - - 46 53404.79 to 53452.79 - - 0.12 - - - EOP(SPBU) 3 R 3 0.22 0.27 0.14 - 0.07 0.03 13 53405.27 to 53447.27 0.13 0.13 0.11 - 0.24 0.06 EOP(SPBU) 2 R 1 - - 0.14 - - - 33 53404.79 to 53452.79 - - 0.13 - - - EOP(MAO) 3 R 1 0.09 0.08 0.03 - - - 13 53405.27 to 53447.26 0.26 0.18 0.10 - - - EOP(USNO) 5 R 1 0.07 0.07 0.02 - 0.16 0.06 13 53405.27 to 53447.27 0.13 0.17 0.05 - 0.11 0.07 EOP(IVS) 0 R 1 0.06 0.06 0.02 - 0.07 0.04 11 53405.00 to 53440.00 0.26 0.15 0.06 - 0.16 0.03 GPS EOP(CODE) 98 P 1 0.02 0.02 - 0.18 - - 56 53404.50 to 53459.50 0.03 0.09 - 0.28 - - EOP(EMR) 96 P 3 0.03 0.03 - 0.04 - - 56 53404.50 to 53459.50 0.06 0.17 - 0.52 - - EOP(ESOC) 96 P 1 0.02 0.02 - 0.08 - - 55 53404.50 to 53458.50 0.06 0.12 - 0.34 - - EOP(GFZ) 96 P 2 0.01 0.01 - 0.01 - - 56 53404.50 to 53459.50 0.03 0.06 - 0.26 - - EOP(IAA) 1 P 1 0.03 0.03 - 0.06 - - 55 53404.50 to 53458.50 0.15 0.37 - 0.41 - - EOP(JPL) 96 P 3 0.02 0.02 - 0.15 - - 45 53404.50 to 53448.50 0.05 0.03 - 0.28 - - EOP(NOAA) 96 P 1 0.01 0.01 - 0.02 - - 50 53404.50 to 53453.50 0.13 0.13 - 0.34 - - EOP(SIO) 96 P 1 0.05 0.05 - 0.13 - - 56 53404.50 to 53459.50 0.07 0.09 - 0.34 - - EOP(IGS F)95 P 2 0.02 0.03 0.07 0.06 - - 38 53404.50 to 53441.50 0.04 0.12 0.24 0.22 - - EOP(IGS R)96 P 2 0.03 0.04 0.18 0.07 - - 56 53404.50 to 53459.50 0.07 0.10 0.60 0.20 - - EOP(IERS) 97 P 1 0.03 0.03 0.25 0.13 - - 56 53404.50 to 53459.50 0.02 0.03 0.32 0.19 - - SLR EOP(ASI) 3 L 2 0.09 0.10 - 0.20 - - 55 53404.50 to 53458.50 0.23 0.36 - 0.91 - - EOP(ILRS) 5 L 1 0.13 0.15 - 0.29 - - 52 53404.50 to 53455.50 0.34 0.25 - 0.84 - - EOP(DUT) 98 L 1 0.12 0.13 - - - - 45 53404.00 to 53448.00 0.56 0.38 - - - - EOP(IAA) 2 L 1 0.05 0.05 0.03 0.03 - - 55 53404.00 to 53458.00 0.26 0.23 0.76 0.37 - - EOP(MCC) 97 L 1 0.06 0.07 - 0.10 - - 50 53404.00 to 53453.00 0.18 0.28 - 0.62 - - Bulletin A EOP(NEOS) 97 C 1 0.07 0.07 0.08 - - - 57 53404.00 to 53460.00 0.13 0.21 0.32 - - -