Passive InfraRed
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Passive infrared sensor — A Passive InfraRed sensor (PIR sensor) is an electronic device that measures infrared (IR) light radiating from objects in its field of view. PIR sensors are often used in the construction of PIR based motion detectors (see below). Apparent… … Wikipedia
passive infrared device — n. a device used to detect motion by detecting changes in heat … Locksmith dictionary
Infrared homing — refers to a passive missile guidance system which uses the emission from a target of electromagnetic radiation in the infrared part of the spectrum to track it. Missiles which use infrared seeking are often referred to as heat seekers , since… … Wikipedia
Infrared — For other uses, see Infrared (disambiguation). An image of two people in mid infrared ( thermal ) light (false color) … Wikipedia
Passive solar building design — Elements of passive solar design, shown in a direct gain application … Wikipedia
infrared linescan system — A passive airborne infrared recording system which scans across the ground beneath the flight path, adding successive lines to the record as the vehicle advances along the flight path … Military dictionary
infrared line-scan system — A passive airborne infrared scanning system that scans the ground along the flight path and produces a high resolution film map of the terrain. The picture shows the relative temperature of all objects on the ground below the aircraft. The system … Aviation dictionary
rocket and missile system — ▪ weapons system Introduction any of a variety of weapons systems that deliver explosive warheads to their targets by means of rocket propulsion. Rocket is a general term used broadly to describe a variety of jet propelled missiles… … Universalium
Burglar alarm — Silent alarm redirects here. For the album, see Silent Alarm (album). Burglar (or intrusion), fire and safety alarms are all electronic today. Sensors are connected to a control unit via a low voltage hardwire or narrowband RF signal which is… … Wikipedia
Electro-optical MASINT — is a subdiscipline of Measurement and Signature Intelligence, (MASINT) and refers to intelligence gathering activities which bring together disparate elements that do not fit within the definitions of Signals Intelligence (SIGINT), Imagery… … Wikipedia
Geophysical MASINT — is a branch of Measurement and Signature Intelligence (MASINT) that involves phenomena transmitted through the earth (ground, water, atmosphere) and manmade structures including emitted or reflected sounds, pressure waves, vibrations, and… … Wikipedia
