The AN/FPS-35 radar was a long range radar used in the early 1960s.
Sperry Corporation built 12 long range radars (picking up objects 200 miles away) in the 1960s to succeed existing Semi Automatic Ground Environment (SAGE) to provide enhanced electronic countermeasures (ECM). The systems operated at 420 to 450 MHz. The antennas weighed 70 to 80 tons and had numerous problems. The concrete tower bases were 80 feet high.