Infrared Thermometer: Ground surface temperature - gndirt

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.红外温度计（infrared thermometer，IRT）是一种地面辐射式高温计，可测量其视场内场景的等效黑体亮度温度。下行式红外温度计具有窄视场，用于测量天空温度并探测云团；上行式红外温度计具有宽视场，用于测量地表的窄带辐射温度。