A TELEVISION SYSTEM FOR TERRAIN SURVEILLANCE

摘要

A system for terrain surveillance from an aircraft utilizing a scanning optical system, a TV monitor, and a modified video recorder. A rotating mirror scans a section of the terrain below the aircraft extending transversely to the aircraft flight path and directs the reflected light onto a photocell. The photocell signal forms the input to the video recorder and TV monitor. The TV display is unconventional in that each frame presented has one new scan added and the lower-most old scan is removed and thus the pilot sees on his monitor a terrain picture which advances as the aircraft moves along its flight path.