From robertk at jpl.nasa.gov Thu Oct 18 08:39:09 2012 From: robertk at jpl.nasa.gov (Robert Khachikyan) Date: Thu, 18 Oct 2012 09:39:09 -0600 Subject: [IGSMAIL-6676] igs08_1710.atx: Update including reactivated Block IIR-M satellite SVN49/PRN27 Message-ID: <5080229D.5080309@jpl.nasa.gov> Dear IGS colleagues! The absolute IGS antenna correction file (igs08_wwww.atx) has been updated. The new release is called 'igs08_1710.atx'. It contains the following changes: 1) According to NANU 2012064 BLOCK IIR-M satellite SVN49 "will resume transmitting L-band utilizing PRN27 on approximately 18 OCT 2012". Therefore, the following satellite has been added to igs08.atx: G27 (G049) Source: > NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2012064 NANU TYPE: GENERAL > *** GENERAL MESSAGE TO ALL GPS USERS *** > On approximately 18 OCT 2012 SVN49 will resume transmitting L-band > utilizing PRN27. At L-band activation, SVN49/PRN27 will be unusable > until further notice. Additionally, no broadcast almanacs will > include SVN49/PRN27. Future NANUs will inform users of any changes to > the above-stated status. http://cgls.uscg.mil/pipermail/nanu/2012-October/001449.html 2) A decommission date for the following satellite has been added: G27 (G027): 17 October 2012 Although officially removed from the GPS constellation on 6 October 2012, SVN27 didn't stop signal transmission before 17 October 2012 according to the IGS tracking statistics provided by CODE (ftp://ftp.unibe.ch/aiub/igsdata/odata_gnss_day.txt). Source: > GPS SATELLITE SVN27 (PRN27) WAS UNUSABLE AS OF JDAY 280 (06 OCT 2012) > AND REMOVED FROM THE GPS CONSTELLATION ON JDAY 280 (06 OCT 2012). http://cgls.uscg.mil/pipermail/nanu/2012-October/001448.html The updated antenna correction model is available at ftp://igs.org/pub/station/general/igs08_1710.atx or ftp://igs.org/pub/station/general/igs08.atx With best regards,