************************************************************************ IERS Message No. 144 May 05, 2009 ************************************************************************ New Bulletin B Dear Bulletin B users Bulletin B made by the IERS EOP Centre is more than 20 years old. Following a survey which was made recently among the community, we are proposing a new presentation. The new Bulletin B and its content description are available on ftp://hpiers.obspm.fr/iers/bul/bulb_new/bulletinb.dat and ftp://hpiers.obspm.fr/iers/bul/bulb_new/bulletinb.pdf It contains: 1 - DAILY FINAL VALUES AND PRELIMINARY VALUES OF x, y, UT1-UTC, dX, dY and their respective uncertainties. Angular unit is milliarcsecond (mas), time unit is millisecond (ms). 2 - DAILY SMOOTHED VALUES OF CELESTIAL POLE OFFSETS (dPsi1980, dEps1980) with respect to IAU 1980 precession-nutation model and their uncertainties. 3 - EARTH ANGULAR VELOCITY : DAILY VALUES OF LOD, OMEGA AT 0hUTC LOD : Excess of the Length of day - 86400 s TAI OMEGA : Earth angular velocity 4 - INFORMATION ON TIME SCALES: TAI-UTC, leap second announcements 5 - SUMMARY OF CONTRIBUTED EARTH ORIENTATION PARAMETERS SERIES This section gives statistics in term of formal errors and WRMS of the combined Technique Centres solutions with respect to the combined solution as well as individual series. The period covered is that one of Bulletin B. In order to allow users to modify their uploading procedures, the previous Bulletin B will still be available under its regular presentation until January 1, 2010 on: ftp://hpiers.obspm.fr/iers/bul/bulb/bulletinb.dat Note that in the new version of Bulletin B, C02 and C03 series which became obsolete are discontinued. We hope these changes will not bring any disagreement. If any question or requirements contact: Daniel.gambis@obspm.fr or Christian.bizouard@obspm.fr. Best regards Daniel Gambis and Christian Bizouard ************************************************************************ IERS Messages are edited and distributed by the IERS Central Bureau. To subscribe or unsubscribe, please write to . Archives: http://www.iers.org/iers/publications/messages/ ************************************************************************