The E-4B was heard eastbound the other day on their WBFM 337.300 UHF Air/ground link system or GEP radio system
Possible bleed over? They usually turn this system off when overseas as few ground stations
there to receive it.Strong signals come from this system.The Navy E-6B's also use GEP system as well.
(UHF-LOS (Line Of Sight) system, is used
to provide up to 12 in-the-clear full duplex voice grade telephone
circuits via a FM-FDM-SSB link in the 225-400 mhz band to Ground Entry
Points (GEPs). The GEPs are located on AT&T microwave towers at
hardened underground switching centers (nuclear bomb proof bunkers)
which are mostly located along the routes of the old hardened
transcontinental coaxial cables. There are also GEPs located at some
military bases and the various underground command and control bunkers
(such as site R). GEP coverage of the US is less extensive than the E/F
coverage but has been provided along most routes that AF-1 often
travels. There are GEPs in other places around the world outside of
the continental US as well.)
Possible bleed over? They usually turn this system off when overseas as few ground stations
there to receive it.Strong signals come from this system.The Navy E-6B's also use GEP system as well.
(UHF-LOS (Line Of Sight) system, is used
to provide up to 12 in-the-clear full duplex voice grade telephone
circuits via a FM-FDM-SSB link in the 225-400 mhz band to Ground Entry
Points (GEPs). The GEPs are located on AT&T microwave towers at
hardened underground switching centers (nuclear bomb proof bunkers)
which are mostly located along the routes of the old hardened
transcontinental coaxial cables. There are also GEPs located at some
military bases and the various underground command and control bunkers
(such as site R). GEP coverage of the US is less extensive than the E/F
coverage but has been provided along most routes that AF-1 often
travels. There are GEPs in other places around the world outside of
the continental US as well.)
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