Abstract
A land-based, passive IR system for the detection of airborne targets has been developed at Saab Missiles. The system operates in the 8 - 12 micrometers region. It scans 360 degree(s) in azimuth and up to 45 degree(s) in elevation and detects targets automatically. The paper describes the system in general, and in more detail the principles of the signal processing, that enable automatic detection of targets in the thermal clutter of sky and terrain background. A unique concept for rejection of false alarms from small objects at short distance (birds) is also described.
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