“An Autonomous Missile Defense System,” Daine Richard Lesniak, Douglas J. Hickok, Kristopher Whisler, and Michael C. Rowe, UWP Computer Science and Software Engineering Student Conference Publications, 2005. The authors, at the University of Wisconsin, Platteville, report [AIR 16:1]:
The paper airplane defense system is organized into three subsystems that detect and locate, track and target, and control a turret and shoot a compressed air gun. This paper describes the details of design,
development, integration, and calibration of the software components as well as the specification and construction of the hardware components of this system.