[IGSMAIL-7406] igs08_1930.atx: Update including reactivated Block IIR-M satellite SVN49/PRN04

[Ralf Schmid]

Dear IGS colleagues!

A happy and healthy new year to all of you!

The absolute IGS antenna correction file (igs08_wwww.atx) has been 
updated. The new release is called 'igs08_1930.atx'. It contains the 
following changes:

1) According to NANU 2017001, Block IIR-M satellite SVN49 will resume 
transmitting L-band utilizing PRN04 on approximately 5 January 2017. 
Therefore, the following satellite has been added to igs08.atx:

G04 (G049)

NANU message 2017001:
> NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2017001 NANU TYPE: GENERAL
> *** GENERAL MESSAGE TO ALL GPS USERS ***
> ON APPROXIMATELY 05 JAN 2017, SVN49 WILL RESUME TRANSMITTING L-BAND UTILIZING PRN04. AT L-BAND ACTIVATION, SVN49/PRN04 WILL BE UNUSABLE UNTIL FURTHER NOTICE. ADDITIONALLY, NO BROADCAST ALMANACS WILL INCLUDE SVN49/PRN04 UNTIL FURTHER NOTICE.
http://www.navcen.uscg.gov/?Do=gpsShowNanu&num=2017001

2) According to CODE, G034 stopped signal transmission on 3 January 
2017. Therefore, a decommission date for the following satellite has 
been added:

G04 (G034): 3 January 2017


The updated antenna correction model is available at
ftp://ftp.igs.org/pub/station/general/igs08_1930.atx
or
ftp://ftp.igs.org/pub/station/general/igs08.atx

Many thanks to Andreja Susnik and Rolf Dach for their help!

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