An Automatic Sensitivity Time Control System
Eugene A. Krueger · IEEE Transactions on Aerospace · 1964
A completely transistorized automatic sensitivity time control (ASTC) circuit was designed and developed to operate in conjunction with a side-looking airborne radar surveillance set. The ASTC technique is a closed loop system which automatically controls the radar receiver gain vs range function in accordance with the average signal return. The addition of ASTC substantially improved the imagery of a side-looking airborne radar recorded during low altitude flights.