| Date: | 2010-07-02 17:59:00 | |
| Sender: | Gérard Petit (IERS Conventions Center) <gpetit@bipm.org> | |
| Subject: | [SLR-Mail] No. 1882: updated IERS Conventions Chapters 1, 5, 8, 9 | |
| Author: | Gérard Petit | |
| Content: | ******************************************************************************** SLR Electronic Mail 2010-07-02 17:59:00 UTC Message No. 1882 ******************************************************************************** Author: G=E9rard Petit (IERS Conventions Center) Subject: updated IERS Conventions Chapters 1, 5, 8, 9 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 21 June 2010, see http://tai.bipm.org/iers/convupdt/convupdt_c1.html. Added explanatory text on GM values; Corrected typos; Change uncertainty = of GM(sun). Chapter 5 ”Transformation between the International Terrestrial = Reference System and Geocentric Celestial Reference System” has been updated on 2 July 2010, see http://tai.bipm.org/iers/convupdt/convupdt_c5.html. * Sections 5.5.1 and 5.5.3 of the chapter have been revised by N. Capitaine and A. Brzezinski to include the effects of libration on the motion of the celestial intermediate pole in the ITRS and the Earth = rotation angle. The subroutine UTLIBR.F has been provided to calculate the = effects on UT1 and LOD. * The subroutine PMSDNUT2.F replaces the former version PMsdnut.for. = It uses numeric data consistent with that provided in the Chapter Table and calls the subroutine FUNDARG.F. Differences between PMSDNUT2.F and PMsdnut.for are at the submicroas level. * The subroutine fcnnut has been updated by S. Lambert, see http://syrte.obspm.fr/~lambert/fcn/. * Correction to Table 5.2e: The sign of the terms in t^4 and in t^5 = of the polynomial part has been corrected. This correction mentioned on 21 October 2009 had not been introduced in the Table (noted by M. Weigelt). = Chapter 8 ”Tidal variations in the Earth´s rotation” has been updated on = 2 July 2010, see http://tai.bipm.org/iers/convupdt/convupdt_c8.html. Tables 8.3a and 8.3b have been modified so that the number of = significant digits is consistent for all quantities and consistent with Table 5.1b = and the routine provided with Chaper 5. Chapter 9 ”Models for propagation delays” has been updated on 2 July 2010, see http://tai.bipm.org/iers/convupdt/convupdt_c9.html. Change of notation in equation (37); correction to equation (48) (noted = by O. Colombo). G=E9rard Petit and Brian Luzum IERS Conventions Center From: =?iso-8859-1?Q?G=E9rard_Petit?= ******************************************************************************** |