[IGSMAIL-7089] igs08_1842.atx: Update including reactivated Block IIR-M satellite SVN49/PRN08

[Ralf Schmid]

Dear IGS colleagues!

The absolute IGS antenna correction file (igs08_wwww.atx) has been 
updated. The new release is called 'igs08_1842.atx'. It contains the 
following changes:

1) According to NANU 2015032, Block IIR-M satellite SVN49 will resume 
transmitting L-band utilizing PRN08 on approximately 30 April 2015. 
Therefore, the following satellite has been added to igs08.atx:

G08 (G049)

Source:
> NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2015032 NANU TYPE: GENERAL
> *** GENERAL MESSAGE TO ALL GPS USERS ***
> ON APPROXIMATELY 30 APR 2015, SVN49 WILL RESUME TRANSMITTING L-BAND UTILIZING PRN08. AT L-BAND ACTIVATION, SVN49/PRN08 WILL BE UNUSABLE UNTIL FURTHER NOTICE. ADDITIONALLY, NO BROADCAST ALMANACS WILL INCLUDE SVN49/PRN08 UNTIL FURTHER NOTICE.
http://www.navcen.uscg.gov/?Do=gpsShowNanu&num=2015032

2) Four robot calibrations provided by GeoMax AG were added:

GMXZENITH10     NONE
GMXZENITH20     NONE
GMXZENITH25     NONE
GMXZENITH25PRO  NONE


The updated antenna correction model is available at
ftp://ftp.igs.org/pub/station/general/igs08_1842.atx
or
ftp://ftp.igs.org/pub/station/general/igs08.atx

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