An infrared imaging system is described that has multiple target capability to measure infrared radiation and to obtain spatial data on missiles in the launch, boost, and re-entry phases. Unclassified aspects of measurements of launch vehicles made at the Seehorn Site, White Sands Missile Range, are discussed. Major components of the system include an infrared vidicon sensitive about 1.4 and an f/1.2 optical system with a 6-deg. field of view for focusing infrared radiation onto the vidicon sensing surface. The output video is viewed on a television monitor and simultaneously recorded in real time on video tape at normal TV rates. From the video recording, it is possible to obtain an A-scope presentation of any single video line on a per frame basis, and hence the radiant intensity of multiple targets can be quantitatively determined from a single observation.