sentences:  During 1959 Watertown AFS began providing Semi Automatic Ground Environment (SAGE) data to DC-03 at Syracuse AFS, New York, and the squadron was re-designated as the 655th Radar Squadron (SAGE) on 1 February 1959.In 1959 a 2nd AN/FPS-6 was added and in 1961, the FPS-20 was upgraded to an AN/FPS-66.One height-finder radar was replaced by an Avco AN/FPS-26 Radar in 1963.