[IGSMAIL-6720] Updates to the IERS Conventions (2010)

[Gerard Petit]

Author: Gérard Petit (IERS Conventions Center)



Information on the updates to the IERS Conventions (2010)



The IERS Conventions Center informs of the following updates:



15 January 2013



* Chapter 9 "Models for atmospheric propagation delays" has been updated,
see http://tai.bipm.org/iers/convupdt/convupdt_c9.html .

Changes are the following:

*         Introduce the model Global Pressure and Temperature 2 in
sections 9.2 "Tropospheric model for radio techniques" and 9.3 "Sources
for meteorological data" (provided by J. Boehm).

*         In the section 9.4 "Ionospheric models for radio techniques",
correct some numerical values in a number of equations for using exact
CODATA (2010) values of fundamental constants (noted by R. Langley).
Changes are not significant with respect to the uncertainties of the
quantities.



* Appendix E with the IUGG Resolution 3 Adopted at the XXVth General
Assembly (2012), has been added, see
http://tai.bipm.org/iers/convupdt/convupdt_ap.html .





The USNO web site http://maia.usno.navy.mil/conv2010/convupdt.html has
similarly been updated.



Gérard Petit and Brian Luzum

IERS Conventions Center



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