| Date: | 2007-11-21 18:25:00 | |
| Sender: | Jim Ray (Conventions Advisory Board) <Jim.Ray <jim.ray@noaa.gov>> | |
| Subject: | [SLR-Mail] No. 1618: recent updates to the IERS Conventions | |
| Author: | Jim Ray | |
| Content: | ******************************************************************************** SLR Electronic Mail 2007-11-21 18:25:00 UTC Message No. 1618 ******************************************************************************** Author: Jim Ray (Conventions Advisory Board) Subject: recent updates to the IERS Conventions Gerard Petit and Brian Luzum of the IERS Conventions Center have announced the following updates in IERS Message No. 121. * Chapter 9 ”Troposheric model” was extensively revised on 28 June 2007, as previously reported. See http://tai.bipm.org/iers/convupdt/convupdt_c9.html * Chapter 5 ”Transformation Celestial and Terrestrial Systems” was updated on + 16 February 2007: Revised section 5.8.3 to make the references for the planetary fundamental arguments clear (from P. Wallace and N. Capitaine). + 23 October 2007: New section 5.4.6 on Free Core Nutation (FCN) has been added with a subroutine for a discrete model by S. Lambert, for those who do not apply IERS published empirical nutation offsets. Additional minor corrections in the text make the chapter´s terminology consistent with current IAU Recommendations. See: http://tai.bipm.org/iers/convupdt/convupdt_c5.html * Chapter 7 ”Displacement of Reference Points” was updated on 20 June 2007 and 23 October 2007 for minor corrections in the solid Earth tides subroutine dehanttideinel.f for effects at the level of 0.1 mm or less. The routine remains under review for some other possible corrections whose effect should be <0.05 mm. See: http://tai.bipm.org/iers/convupdt/convupdt_c7.html Information on all IERS Conventions updates can be found at: http://tai.bipm.org/iers/convupdt/convupdt.html From: ”Jim.Ray” ******************************************************************************** |