[IGSMAIL-6743] igs08_1730.atx: Update including reactivated R743

[Robert Khachikyan]

Dear IGS colleagues!

The absolute IGS antenna correction file (igs08_wwww.atx) has been 
updated. The new release is called 'igs08_1730.atx'. It contains the 
following changes:

1) According to the Information-Analytical Centre, GLONASS-M satellite 
R743 was reactivated utilizing almanac slot 8. Therefore, the following 
satellite has been added to igs08.atx:

R08 (R743)

> According to the monitoring IAC, a planned maintenance with SC 
> Glonass-M #743 (orbital slot 8) successfully completed, the SC is used 
> for the intended purpose
http://www.glonass-ianc.rsa.ru/en/content/news/?ELEMENT_ID=403

According to Stefan Schaer (IGSMAIL-6734) and Richard Langley 
(IGSMAIL-6737), the satellite already got activated on 22 February 2013.

2) According to IGSMAIL-6734 and IGSMAIL-6737, GLONASS-K1 satellite R801 
was still active using the same almanac slot, when R743 was switched on. 
This is reflected by the following new file entry:

R26 (R801)


For more information please refer to the following two IGSMAILs:

[IGSMAIL-6734] Irregular GLONASS constellation change (for R08)
http://igscb.jpl.nasa.gov/pipermail/igsmail/2013/007924.html

[IGSMAIL-6737] Two Active GLONASS Slot 8 Satellites Temporarily -- 
Potential Difficulties
http://igscb.jpl.nasa.gov/pipermail/igsmail/2013/007927.html


The updated antenna correction model is available at
ftp://igs.org/pub/station/general/igs08_1730.atx
or
ftp://igs.org/pub/station/general/igs08.atx

Thanks to Stefan and Richard for their help and sorry for the delay!

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