The JSLSCAD is a passive infrared (IR) detection system that detects the presence or absence of chemical warfare agents in the 800 to 1200 wave number region of the electromagnetic spectrum by monitoring the ambient background IR radiation. The JSLSCAD signal processing hardware discriminates between the chemical targets and the other nontoxic species in a complex battlefield environment.The Joint Service Lightweight Standoff Chemical Agent Detector is a small, fully-automatic, standoff chemical agent detector. The unit is capable of on-the-move, real-time detection from either aerial or surface platforms. The unit will detect and alarm to a chemical agent cloud up to 5 kilometers away. The detector also provides chemical identification information and data for activation of countermeasures to avoid contamination. The JSLSCAD is equipped for visual and audible alarm and can display the agent class and relative position. This information is available locally and transmission to battlefield information networks. JSLSCAD also has the capability to indicate an all-clear condition.