Intelligence derived by monitoring the electromagnetic spectrum from ultraviolet (0.01 micrometers) through far infrared (1,000 micrometers).
Infrared intelligence was used for the 2004 Summer Olympics. The $312 million U.S. security system received audio and visual images from an electronic Web having greater than 1,000 high-resolution and infrared cameras, a sensor-equipped blimp, mobile command centers, patrol boats, and numerous vehicles. Cameras with speech-recognition software collected spoken-word information and transcribed it into text, searching for particular word patterns.
About Inc. U.S. Military: electro-optical intelligence. [Online, 2004.] About Inc. Website. http://usmilitary.about.com/library/glossary/e/bldef02164.htm; In Brief. Security Rings Olympics. The Globe and Mail, August 12, 2004, p. B7.