The Air Force had a program called Spacetrack, which was a network of space-probing cameras and radar.
[2] (Bendix, Sperry Rand and Hughes competed for SPADATS contract in the early 1962 on the basis of their prior experience in phased array technology.
[3]) It first operated at the Electronic Systems Command building at Hanscom and in 1963 was transferred to the Ent Air Force Base[2] and then to the Cheyenne Mountain Complex in 1965[4] or 1966.
[2] SPADATS was developed in assembly language and the hardware at all three locations was Philco 2000/Model 212 large scale transistor computers.
[5] Spiral Decay, a Special Perturbation Program, was used to model the motion of space objects re-entering the Earth's atmosphere.