From jim.ray at noaa.gov Thu Jun 18 06:05:33 2009 From: jim.ray at noaa.gov (Jim.Ray) Date: Thu, 18 Jun 2009 09:05:33 -0400 Subject: [IGSMAIL-5955]: updated IERS Conventions Chapter 5 Message-ID: <4A3A3B9D.2040609@noaa.gov> ****************************************************************************** IGS Electronic Mail 18 Jun 06:05:59 PDT 2009 Message Number 5955 ****************************************************************************** Author: Jim Ray (forward of IERS Message) -------- Original Message -------- ************************************************************************ IERS Message No. 147 June 18, 2009 ************************************************************************ Information on the updates to the IERS Conventions The IERS Conventions Center provides the following information on the updates to the IERS Conventions since IERS Message No. 143 (April 16, 2009). Chapter 5 "Transformation between the International Terrestrial Reference System and Geocentric Celestial Reference System" has been updated on 16 June 2009, see http://tai.bipm.org/iers/convupdt/convupdt_c5.html . The chapter (with a new title) has been significantly rewritten, with N. Capitaine and P. Wallace as the main authors, in order to make the chapter compliant with the IAU 2000/2006 resolutions and the corresponding terminology. A presentation of the IAU 2006 resolutions has been added, and a description of the models, procedures and software to implement the IAU 2000/2006 resolutions have been included. The organization of the chapter has been modified in order to clarify the successive steps to be followed in the coordinate transformation. As numerous changes have occured throughout the whole chapter, they cannot be individually highlighted. Minor changes have been made on 14 May 2009 to Chapters 6, 7 and 10, see the links in http://tai.bipm.org/iers/convupdt.html . Gerard Petit and Brian Luzum IERS Conventions Center ************************************************************************ 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/ ************************************************************************