A passive sensor is a type of sensor that detects and measures the energy emitted by an object or phenomenon without requiring any external energy source. It relies solely on the energy emitted by the object or phenomenon being measured, such as temperature, radiation, or light. Examples of passive sensors include infrared cameras, radiometers, and passive microwave sensors. They are commonly used in remote sensing applications, such as weather forecasting, environmental monitoring, and surveillance.

What is passive sensor

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