[IGSMAIL-6866] igs08_1780.atx: G064 launched, R714 reactivated

[Ralf Schmid]

Dear IGS colleagues!

The absolute IGS antenna correction file (igs08_wwww.atx) has been 
updated. The new release is called 'igs08_1780.atx'. It contains the 
following changes:

1) The fifth Block IIF satellite launched on 21 February 2014 has been 
added:

G30 (G064)

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 (2014-008A?) has not been confirmed yet.

Source:
> The US Air Force’s fifth GPS Block IIF navigation satellite was launched on Thursday night. Liftoff, from Cape Canaveral Air Force Station in Florida, via the United Launch Alliance (ULA) Delta IV rocket, came at the end of a nineteen-minute window, resulting in a T-0 of 8:59 pm Eastern (01:59 UTC on Friday).
...
> GPS IIF-5, which is also numbered GPS IIF SV-5 and has Space Vehicle Number 64. It is expected to be given Pseudo-Random Noise (PRN) code 30.
http://www.nasaspaceflight.com/2014/02/ula-delta-iv-launch-gps-iif-5/

2) According to the Information-Analytical Centre, GLONASS-M satellite 
R714 was reactivated utilizing almanac slot 18. Therefore, the following 
satellite has been added:

R18 (R714)

Sources:

> Orb. slot  Orb. pl.  RF chnl  # GC  Launched
>    18         3        -6      714  25.12.05
http://glonass-iac.ru/en/GLONASS/

> 008-140220
> NOTICE ADVISORY TO GLONASS USERS (NAGU) 008-140220
> REF: 062-111220
> SUBJ: 18/-6 (714) UNUSABLE 16.02/0000 MT - UNFINISHED
> 1.CONDITION: 18/-6 (714) UNUSABLE SINCE 16.02/0000
>  MT (UTC+0300) UNTIL FURTHER NOTICE DUE TO MAINTENANCE
http://glonass-iac.ru/en/CUSGLONASS/index.php

3) Decommission dates for the following satellites were added:

G30 (G049): 10 February 2014
R18 (R724): 11 February 2014

All dates according to the IGS tracking statistics as provided by CODE:
ftp://ftp.unibe.ch/aiub/igsdata/odata_gnss_day.txt


The updated antenna correction model is available at
ftp://igs.org/pub/station/general/igs08_1780.atx
or
ftp://igs.org/pub/station/general/igs08.atx

Many thanks to Richard Langley and Stefan Schaer for their help!

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