infrared line-scan system
infrared line-scan system (IRLS)
A passive airborne infrared scanning system that scans the ground along the flight path and produces a high-resolution film map of the terrain. The picture shows the relative temperature of all objects on the ground below the aircraft. The system is widely used to detect camouflaged targets as well as to take photographs of the enemy's areas at night.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved