| Date: | 2010-09-24 09:04:00 | |
| Sender: | Gérard Petit (IERS Conventions Center) <gpetit@bipm.org> | |
| Subject: | [SLR-Mail] No. 1912: updated IERS Conventions Chapters 6, 7, 9 | |
| Author: | Gérard Petit | |
| Content: | ******************************************************************************** SLR Electronic Mail 2010-09-24 09:04:00 UTC Message No. 1912 ******************************************************************************** Author: G=E9rard Petit (IERS Conventions Center) Subject: updated IERS Conventions Chapters 6, 7, 9 Information on the updates to the IERS Conventions The IERS Conventions Center informs of the following updates. Three chapters of the IERS Conventions have been updated: * Chapter 6 ”Geopotential” has been updated on 19 September 2010,=20 see http://tai.bipm.org/iers/convupdt/convupdt_c6.html. The section 6.3 ”Effect of the ocean tides” has been rewritten, and the = tide model FES2004=20 is described (main contributors are S. Bettadpur, R. Biancale and J. = Ries).=20 The introduction has been expanded to present general notions. * Chapter 7 ”Displacement of reference points” has been updated on 21 September 2010, see http://tai.bipm.org/iers/convupdt/convupdt_c7.html. The chapter has been reorganized to consider three kinds of = displacements, see the chapter´s introduction for details. A new section treats ”S1-S2 atmospheric pressure loading” based on the = work of T. van Dam and R. Ray; the model is implemented at http://geophy.uni.lu/ggfc-about/tide-loading-calculator.html, see the = text for details. * Chapter 9 ”Models for propagation delays” has been updated on 21 = September 2010:=20 see http://tai.bipm.org/iers/convupdt/convupdt_c9.html. A mean a priori model for gradients is given along with information on = its use for radio techniques (provided by J. Boehm). G=E9rard Petit and Brian Luzum IERS Conventions Center From: =?iso-8859-1?Q?G=E9rard_Petit?= ******************************************************************************** |