[IGSMAIL-8306] igs20_2247: Update including new GPS BLOCK IIIA satellite G079

[arturo.villiger at unibe.ch]

Dear colleagues


The absolute IGS antenna correction file (igs20_wwww.atx) has been updated.

The new release is called 'igs20_2247.atx'. It contains the following

changes:



1)      According to GPS NANU 2023007 a new GPS BLOCK III A satellite was launched on 18. January 2023.



2. GPS SATELLITE SVN79 (PRN28) WAS LAUNCHED ON JDAY 018.

   A USABINIT NANU WILL BE SENT WHEN THE SATELLITE IS SET ACTIVE TO SERVICE.

https://www.navcen.uscg.gov/sites/default/files/gps/nanu/2023/2023007.nnu





The GPS satellite started to transmit on the 31. January 2023. Therefore, following starting date has been added:



G28 (G079): 31. January 2023



As preliminary PCOs the values from GPS BLOCK IIIA G078 has been used.



2)      According to CODE the GPS satellite G049 has stopped transmitting since 2. November 2022.  Therefore, following decommission date has been added:



G28 (G049): 02. November 2022



The updated antenna correction model is available at

https://files.igs.org/pub/station/general/igs20_2247.atx

and

https://files.igs.org/pub/station/general/igs20.atx



With best regards,



Arturo Villiger



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