[LEAPSECS] Fwd: IERS Message No. 144: New Bulletin B

[Rob Seaman]

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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