Infrared Thermometer: Sky brightness temperature, 5-Hz instantaneous - irt200ms

The infrared thermometer (IRT) is a ground-based radiation pyrometer that measures the equivalent blackbody brightness temperature of the scene in its field of view. The downwelling version has a narrow field of view for measuring sky temperature and detecting clouds. The upwelling version has a wide field of view for measuring the narrowband radiating temperature of the ground surface.

红外测温仪（infrared thermometer, IRT）是一种地面辐射高温计，可测量其视场内场景的等效黑体亮度温度。下行型红外测温仪具备窄视场，用于测量天空温度并探测云层。上行型红外测温仪具备宽视场，用于测量地表的窄带辐射温度。