Either someone out there is reading leapsecs - or somebody else is paying attention. Either way it is a good thing :-) --
Begin forwarded message: > From: <[email protected]> > Date: January 7, 2011 8:40:47 AM MST > To: <[email protected]> > Subject: IERS Message No. 180 - revised version > > Please note: This is a corrected version of IERS Message No. 180 > distributed on January 5, 2011. > > ************************************************************************ > IERS Message No. 180 January 07, 2011 > ************************************************************************ > > > Revision of IERS Earth Rotation Series effective 1 February 2011 > > > The current series of IERS Earth Orientation Parameters (EOP) provides > the official transformation between the International Celestial > Reference Frame (ICRF) and the International Terrestrial Reference Frame > (ITRF). > > In order to be consistent with the recently released ITRF2008, the IERS > EOP C04 is being revised. The new solution 08C04 is the reference > solution starting on 1 February 2011. Relative to 05C04, changes in the > EOP series consist of > > 1) A negligible bias in x-pole and a bias of about -50 +/- 25 > microarcseconds in y-pole in the sense of y (08C04) - y (05C04); > > 2) Changes in UT1-TAI and celestial pole offsets are respectively on > the order of 2 microseconds, 1, and 17 microarcseconds which are > at the level of the WRMS between IVS individual solutions. > > Other IERS EOP series (Bulletin B, C01) will be expressed in this new > system consistent with ITRF2008 starting with solutions after 1 February > 2011. > > The Rapid Service/Prediction Center solutions (Bulletin A and daily) > will be expressed in the new system starting with solutions made on > 1 February 2011. > > The new version of the C 04 computed in the new system is now called > IERS 08 C 04. > > IERS 08 C 04 series will be available at: > ftp://hpiers.obspm.fr/iers/eop/eopc04 > > A notice describing its characteristics will be available at: > ftp://hpiers.obspm.fr/iers/eop/eopc04/C04.guide.pdf > > Past version of C 04 can be downloaded until 30 June 2011 from: > ftp://hpiers.obspm.fr/iers/eop/eopc04_05/ > > > Thank you for your cooperation > > D. Gambis, C. Bizouard, Earth Orientation Center, > Paris Observatory > B. Luzum, N. Stamatakos, IERS Rapid Service/Predictions Center, > US Naval Observatory > > > ************************************************************************ > IERS Messages are edited and distributed by the IERS Central Bureau. > To submit texts for distribution and to subscribe or unsubscribe, > please write to <[email protected]>. > Archives: http://www.iers.org/Messages/ > ************************************************************************ > _______________________________________________ LEAPSECS mailing list [email protected] http://six.pairlist.net/mailman/listinfo/leapsecs
