[IGSMAIL-6775] igs08_1740.atx: Update including Block IIF-4 satellite SVN66/PRN27

[Ralf Schmid]

Dear IGS colleagues!

The absolute IGS antenna correction file (igs08_wwww.atx) has been 
updated. The new release is called 'igs08_1740.atx'. It contains the 
following changes:

The fourth Block IIF satellite launched on 15 May 2013 has been added:

G27 (G066)

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

NANU message 2013031:
> NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2013031
> SUBJ: SVN66 (PRN27) LAUNCH JDAY 135
> 1.     NANU TYPE: LAUNCH
>        NANU NUMBER: 2013031
>        NANU DTG: 152256Z MAY 2013
>        SVN: 66
>        PRN: 27
>        LAUNCH JDAY: 135
>        LAUNCH TIME ZULU: 2138
>
> 2. GPS SATELLITE SVN66 (PRN27) WAS LAUNCHED ON JDAY 135.
>    A USABINIT NANU WILL BE SENT WHEN THE SATELLITE IS SET ACTIVE TO SERVICE.
http://cgls.uscg.mil/pipermail/nanu/2013-May/001502.html

The COSPAR ID (2013-023A?) has not been confirmed yet.


The updated antenna correction model is available at
ftp://igs.org/pub/station/general/igs08_1740.atx
or
ftp://igs.org/pub/station/general/igs08.atx

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