[IGSMAIL-5900]: expanded Conventions Chapter 9 posted

[Jim.Ray]

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IGS Electronic Mail      13 Feb 11:43:02 PST 2009      Message Number 5900
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Author: Jim Ray (IERS Conventions Advisory Board)

Yesterday Gerard Petit posted an expanded version of IERS
Conventions Chaper 9.  This chapter previously covered only
tropospheric propagation delays, but it is now expanded to
include ionospheric effects as well.  So the title of the
chapter has been changed accordingly.

Please refer to the website:

http://tai.bipm.org/iers/convupdt/convupdt_c9.html

The new section 9.4 "Ionospheric models for radio techniques"
was written by M. Hernandez Pajares with contributions by
U. Hugentobler, F. Mercier, and others.  It provides a rather
comprehensive summary of the effects over a wide range of
frequencies used for geodesy.


Please refer to the IERS Conventions update website:
http://tai.bipm.org/iers/convupdt/convupdt.html