In the 1970's the AFGL developed a suite of radiotelescopes to monitor the Sun for the USAF Air Weather Service (AWS). This radiotelescope system monitored 8 discrete frequencies using 3 parabolic dish antennae. The prototype unit was constructed at Sagamore Hill in Massachusetts, because of its proximity to Hanscom AFB, the home of AFGL. A commercial firm, Cincinnati Electronics, was then commissioned to produce further systems, and these were deployed, in chronological order, at Palehua, Hawaii, Learmonth in Western Australia, and lastly at San Vito in southern Italy (near Brindisi). At the same time, a swept frequency solar interferometer was developed to cover the low VHF band.