From seaman at noao.edu  Tue May  5 11:34:22 2009
From: seaman at noao.edu (Rob Seaman)
Date: Tue, 5 May 2009 08:34:22 -0700
Subject: [LEAPSECS] Fwd: IERS Message No. 144: New Bulletin B
References: <371BE82A03680E4087F343D5C9883D8D02D3EDBC@FS029EXCH.bkg>
Message-ID: <CE98E341-C4ED-47E1-841A-F1BB27C4E762@noao.edu>

FYI (although I suppose most here are subscribed to these messages :-)

Begin forwarded message:

> From: <central_bureau at iers.org>
> Date: May 5, 2009 6:47:29 AM GMT-07:00
> To: <messages at iers.org>
> Subject: IERS Message No. 144: New Bulletin B
>
> ************************************************************************
> 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 at obspm.fr or
> Christian.bizouard at 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  
> <central_bureau at iers.org>.
> Archives: http://www.iers.org/iers/publications/messages/
> ************************************************************************

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