OVERVIEW: A satellite-based IR (Infrared) camera is a spaceborne imaging sensor designed to detect and record thermal radiation emitted by objects on Earth or in space. These cameras enable continuous, high-altitude thermal surveillance for military, environmental, meteorological, and strategic intelligence purposes.

GENERAL DESCRIPTION: Satellite IR Cameras (1st generation) were early space-based thermal imaging systems developed during the Cold War for detecting large heat sources such as missile launches and industrial activity. Operating in the mid to long-wave infrared spectrum, they used low-resolution scanning arrays with rudimentary onboard processing. While constrained by pixel resolution and limited real-time capability, these systems marked the beginning of persistent global IR surveillance from orbit.

ROLE SUMMARY:
Category: Infrared Surveillance / Strategic Early Warning
Primary Use: Missile launch detection, heat signature monitoring, strategic reconnaissance
Function: Passive long-range thermal detection from geosynchronous or polar orbit
Platform: Early warning and reconnaissance satellites (e.g., U.S. Defense Support Program - DSP)

See Specific information under [Sensors/EW] and [Properties] sections.

SOURCE:
U.S. Air Force DSP Satellite Program Records
FAS: Space-Based IR Surveillance