[IGSMAIL-5983]: New: igs05_1544.atx

[Robert Khachikyan]

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IGS Electronic Mail      13 Aug 01:14:27 PDT 2009      Message Number 5983
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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_1544.atx'. It contains the 
following changes:

1) In preparation for the launch of SVN50, a 'decommission date' for the 
following satellite has been added:

G05 (G035): 8 June 2009

"Although SVN35/PRN05 was decommissioned from active service on 26 March 
2009, its L-band transmitters remained active for over two months. 
According to International GNSS Service monitoring reports, the L-band 
transmitters were shut off on June 8."
https://listserv.unb.ca/cgi-bin/wa?A2=ind0906&L=CANSPACE&P=10398
http://www.navcen.uscg.gov/archives/GPS/2009/NANUS/2009023.nnu

2) Three additional robot calibrations provided by Geo++ GmbH:

TPSCR.G3        NONE

This antenna type obviously is already in use at IGS site VALD.
http://igscb.jpl.nasa.gov/mail/igsstation/2009/msg00453.html

TRM59800.80     NONE
TRM59800.80     SCIS

The latter calibration values were copied from the corresponding 
TRM59800.00 antenna/radome combinations. As TRM59800.00 and TRM59800.80 
(TRM29659.00 upgraded to TRM59800.00) are identical in construction, the 
two antenna types are assumed to show similar phase center corrections. 
However, a confirmation by one of the calibration institutions is 
missing so far.

The update of the antenna correction model is available at
ftp://igscb.jpl.nasa.gov/pub/station/general/igs05_1544.atx
or
ftp://igscb.jpl.nasa.gov/pub/station/general/igs05.atx


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