[IGSMAIL-6914] igs08_1793.atx: Update including Block IIF-6 satellite SVN67/PRN06

[Ralf Schmid]

Dear IGS colleagues!

The absolute IGS antenna correction file (igs08_wwww.atx) has been 
updated. The new release is called 'igs08_1793.atx'. It contains the 
following changes:

1) The sixth Block IIF satellite launched on 17 May 2014 has been added:

G06 (G067)

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

PCO_X =  39.4 cm
PCO_Y =   0.0 cm
PCO_Z = 160.0 cm

The COSPAR ID (2014-026A?) has not been confirmed yet.

NANU message 2014045:
> NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2014045
> SUBJ: SVN67 (PRN06) LAUNCH JDAY 137
> 1. NANU TYPE: LAUNCH
> NANU NUMBER: 2014045
> NANU DTG: 170002Z MAY 2014
> SVN: 67
> PRN: 06
> LAUNCH JDAY: 137
> LAUNCH TIME ZULU: 0003
>
> 2. GPS SATELLITE SVN67 (PRN6) WAS LAUNCHED ON JDAY 137.
> A USABINIT NANU WILL BE SENT WHEN THE SATELLITE IS SET ACTIVE TO SERVICE.
http://www.navcen.uscg.gov/?Do=gpsShowNanu&num=2014045

spaceflightnow.com: New GPS satellite headed to upgrade navigation network
http://www.spaceflightnow.com/delta/d366/#.U3n1N8uACnw


2) A decommission date for the following satellite was added according 
to the IGS tracking statistics as provided by CODE 
(ftp://ftp.unibe.ch/aiub/igsdata/odata_gnss_day.txt):

G06 (G049): 5 May 2014


The updated antenna correction model is available at
ftp://igs.org/pub/station/general/igs08_1793.atx
or
ftp://igs.org/pub/station/general/igs08.atx

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