Message-ID: <4BA3AFF5.3060600@jpl.nasa.gov>
Date: Fri, 19 Mar 2010 10:10:13 -0700
From: Robert Khachikyan <robertk@jpl.nasa.gov>
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Subject: [IGSMAIL-6111]: Update: igs05_1575.atx
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IGS Electronic Mail      19 Mar 10:10:04 PDT 2010      Message Number 6111
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Author: Ralf Schmid and Robert Khachikyan

Dear IGS colleagues!

The absolute IGS antenna correction file (igs05_wwww.atx) has been
updated. The new release is called 'igs05_1575.atx'. It contains the
following changes:

1) The latest GLONASS-M satellites launched on 1 March 2010 have
been added with preliminary z-offset values of 230.0 cm:

R22 (R731)
R23 (R732)
R24 (R735)

R732 was added with a later 'launch date' (19 March 2010), as R714 was
still active in the same slot. Unfortunately, the date of the
switch-over was not announced. The corresponding COSPAR IDs contained in
the file are not confirmed so far and could be changed later on!

2) 'Decommission' dates for the following satellites have been added:

R22 (R726): 28 February 2010
R23 (R714): 18 March 2010
R24 (R713): 28 February 2010

3) Three additional receiver antenna calibrations provided by Leica
Geosystems AG have been added:

LEIAS10         NONE
LEIGS09         NONE
LEIMNA950GG     NONE

The phase center corrections for the first two antenna types were just
copied from other types that should be identical in construction.
However, a confirmation by one of the calibration institutions is
missing so far.


The updated antenna correction model is available at
ftp://igs.org/pub/station/general/igs05_1575.atx
or
ftp://igs.org/pub/station/general/igs05.atx

Information on the upcoming switch from igs05.atx to igs08.atx may be
found at
http://www.iapg.bv.tum.de/mediadb/117723/117724/Vortrag_AGU09_schmid.pdf

General information on "How to use IGS antenna phase center
corrections?" may be found at
http://techtalk.sidt.gpsworld.com/?p=466

With best regards,
Ralf Schmid and Robert Khachikyan
on behalf of the IGS Antenna Working Group