[IGSMAIL-7386] igs08_1926.atx: Reactivated SVN34/PRN04 and four Galileo satellites added

[Ralf Schmid]

Dear IGS colleagues!

The absolute IGS antenna correction file (igs08_wwww.atx) has been 
updated. The new release is called 'igs08_1926.atx'. It contains the 
following changes:

1) According to NANU 2016072, Block IIA satellite SVN34 will resume 
transmitting L-band utilizing PRN04 on approximately 9 December 2016. 
Therefore, the following satellite has been added to igs08.atx (The 
actual start date will be adapted with the next release.):

G04 (G034)

NANU message 2016072:
> NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2016072 NANU TYPE: GENERAL
> *** GENERAL MESSAGE TO ALL GPS USERS ***
> ON APPROXIMATELY 09 DEC 2016 SVN34 WILL RESUME TRANSMITTING L-BAND UTILIZING PRN04. AT L-BAND ACTIVATION, SVN34/PRN04 WILL BE UNUSABLE UNTIL FURTHER NOTICE. ADDITIONALLY, NO BROADCAST ALMANACS WILL INCLUDE SVN34/PRN04 UNTIL FURTHER NOTICE.
http://www.navcen.uscg.gov/?Do=gpsShowNanu&num=2016072

2) The four GALILEO-2 satellites launched on 17 November 2016 have been 
added (The corresponding COSPAR IDs have not been confirmed yet and 
could be changed later on, if needed.):

E03 (E212)
E04 (E213)
E05 (E214)
E07 (E207)

The following phase center offset (PCO) values were assigned:

PCO_X =  12.0 cm
PCO_Y =  -1.0 cm
PCO_Z = 110.0 cm

NAGU message 2016050:
>  NOTICE ADVISORY TO GALILEO USERS (NAGU) 2016050
> DATE GENERATED (UTC): 2016-11-22 08:20
>
> NAGU TYPE: GENERAL
> NAGU NUMBER: 2016050
> NAGU SUBJECT: LAUNCH OF GSAT0207, GSAT0212, GSAT0213 AND GSAT0214
> NAGU REFERENCED TO: N/A
> START DATE EVENT (UTC): 2016-11-17 13:06
> END DATE EVENT (UTC): N/A
> SATELLITE AFFECTED: GSAT0207, GSAT0212, GSAT0213, GSAT0214
>
> EVENT DESCRIPTION: GALILEO SATELLITES GSAT0207 (SVID 07), GSAT0212 (SVID 03), GSAT0213 (SVID 04) AND GSAT0214 (SVID 05) WERE LAUNCHED ON 2016-11-17 AT 13:06 UTC.  GSAT0207, GSAT0212, GSAT0213 AND GSAT0214 ARE PLANNED TO BE POSITIONED IN SLOTS C06, C08, C03 AND C01 OF THE CONSTELLATION.  USERS WILL BE ADVISED OF AVAILABILITY OF SIGNALS FOLLOWING COMPLETION OF COMMISSIONING ACTIVITIES.
https://www.gsc-europa.eu/notice-advisory-to-galileo-users-nagu-2016050

More information on the Galileo constellation can be found at
http://mgex.igs.org/IGS_MGEX_Status_GAL.html

3) According to the IGS tracking statistics provided by CODE 
(ftp://ftp.unibe.ch/aiub/igsdata/odata_gnss_day.txt), G032 stopped 
signal transmission on 5 December 2016. Therefore, a decommission date 
for the following satellite has been added:

G04 (G032): 5 December 2016

4) One robot calibration provided by Geomax AG has been added:

GMXZENITH15     NONE


The updated antenna correction model is available at
ftp://ftp.igs.org/pub/station/general/igs08_1926.atx
or
ftp://ftp.igs.org/pub/station/general/igs08.atx

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