Representation of weather and terrain effects on intrusion detection

Two types of decision aids for incorporating weather and terrain effects in IDS-based security decisions are presented for eight classes of exterior IDSs: passive [thermal] infrared, fence-mounted, microwave radar, taut wire, near-infrared beambreak, ground motion, ported. coaxial cable, and video motion detection. One decision aid is a diagram of weather and terrain influences; it indicates interactions among site conditions and their joint impact on IDS detection capability. The second decision aid is a set of rankings of most- to least-favorable site conditions for IDS reliability in terms of meeting physical security standards of 90% probability of detection at 90% confidence level, with a low nuisance alarm rate.