Standoff detection is a research area in the field of remote sensing and homeland security that focuses on the development of technologies and techniques for detecting, identifying, and analyzing objects or substances from a safe distance. This can include the use of various sensors, such as infrared, ultraviolet, and acoustic sensors, as well as imaging technologies like radar and hyperspectral imaging. Standoff detection systems are often used for monitoring air, land, and maritime environments for threats such as explosives, chemical and biological agents, and illicit substances. By enabling detection from a distance, standoff detection systems can help protect personnel and assets from potential threats without requiring close physical proximity to the source of danger.