| Date: | 2010-04-10 00:31:00 | |
| Sender: | Gérard Petit (IERS Conventions Center) <gpetit@bipm.org> | |
| Subject: | [SLR-Mail] No. 1858: updated IERS Conventions Chapters 1 and 3 | |
| Author: | Gérard Petit | |
| Content: | ******************************************************************************** SLR Electronic Mail 2010-04-10 00:31:00 UTC Message No. 1858 ******************************************************************************** Author: G=E9rard Petit (IERS Conventions Center) Subject: updated IERS Conventions Chapters 1 and 3 Information on the updates to the IERS Conventions The IERS Conventions Center informs of the following updates: Chapter 1 ”General definitions and numerical standards” has been updated = on 9 April 2010, see http://tai.bipm.org/iers/convupdt/convupdt_c1.html. [Note that an interim version was present on 8 April 2010, please update if you happen to have taken it] The section ”Numerical standards” has been re-written and the list=20 of constants ensures consistency with the IAU (2009) system of=20 astronomical constants. Chapter 3 ”Conventional Dynamical Realization of the ICRS” has been = updated on 8 April 2010, see http://tai.bipm.org/iers/convupdt/convupdt_c3.html. The chapter has been re-written (with W.M. Folkner as main contributor)=20 and provides information on recently released ephemerides.=20 When a conventional choice is needed, DE421 is recommended to provide=20 continuity for implementation by users. G=E9rard Petit and Brian Luzum IERS Conventions Center ---------------------------------------- Gerard Petit Time, frequency and gravimetry department, BIPM Address: Pavillon de Breteuil 92312 Sevres FRANCE Phone: (33)1-45077067 FAX: (33)1-45077059 E-mail: gpetit@bipm.org=20 From: =?iso-8859-1?Q?G=E9rard_Petit?= ******************************************************************************** |